djvu | d91912b4b945e88e881e54573390e6723cfc41916b6546453b59e60f9beee337

Analysis

max time kernel
141s
max time network
127s
platform
windows10-2004_x64
resource
win10v2004-20250502-en
resource tags

arch:x64arch:x86image:win10v2004-20250502-enlocale:en-usos:windows10-2004-x64system
submitted
04/05/2025, 04:53

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General

Target

c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe
Size

983KB
MD5

e15e3cfa542459e8d87e8bfdf70a38a1
SHA1

1c98fbf7b780fc8ab7f73d468ab77b41570c9665
SHA256

c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286
SHA512

fd55639cc4f757f90a01236b10bf33bd678ef7a141c6538a5285133aa8d610bb0bf287043717557a26d28a924f3c44fbf37c13421f27a389f2e8fc76ce4b91fe
SSDEEP

24576:Fp90jN2CdssXMZ/ggHEfsLJ4qFKqyqG5nFYR1t:N0NDdssygGl94qFKqyqYa

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

http://dell1.ug/hosuhf37t5iqy3guygg6w4guiner/37tiuywgw/get.php

Attributes

extension
.meds
offline_id
Pq9d1D32xIxjAlRK7OkLl3utdbWN8syVVEm35xt1
payload_url
http://dell1.ug/files/cost/updatewin1.exe

http://dell1.ug/files/cost/updatewin2.exe

http://dell1.ug/files/cost/updatewin.exe

http://dell1.ug/files/cost/3.exe

http://dell1.ug/files/cost/4.exe

http://dell1.ug/files/cost/5.exe
ransomnote
ATTENTION! Don't worry, you can return all your files! All your files like photos, databases, documents and other important are encrypted with strongest encryption and unique key. The only method of recovering files is to purchase decrypt tool and unique key for you. This software will decrypt all your encrypted files. What guarantees you have? You can send one of your encrypted file from your PC and we decrypt it for free. But we can decrypt only 1 file for free. File must not contain valuable information. You can get and look video overview decrypt tool: https://we.tl/t-ZFjRnJfc9f Price of private key and decrypt software is $980. Discount 50% available if you contact us first 72 hours, that's price for you is $490. Please note that you'll never restore your data without payment. Check your e-mail "Spam" or "Junk" folder if you don't get answer more than 6 hours. To get this software you need write on our e-mail: [email protected] Reserve e-mail address to contact us: [email protected] Your personal ID: 162Ad768734uygjdfg

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 8 IoCs

resource	yara_rule
behavioral21/memory/1952-2-0x0000000002450000-0x000000000256A000-memory.dmp	family_djvu
behavioral21/memory/1952-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral21/memory/4136-14-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral21/memory/1952-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral21/memory/1952-20-0x0000000002450000-0x000000000256A000-memory.dmp	family_djvu
behavioral21/memory/4136-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral21/memory/4136-25-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral21/memory/4136-26-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu
Djvu family
djvu

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3342576763-1998465526-3870295501-1000\Control Panel\International\Geo\Nation	c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
3928	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3342576763-1998465526-3870295501-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\d7ee7c73-ed53-417d-8e1a-b9132bd0f954\\c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe\" --AutoStart"	c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe

Looks up external IP address via web service 3 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
3	api.2ip.ua
13	api.2ip.ua
1	api.2ip.ua

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1072	1952	WerFault.exe	86

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1952	c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe
1952	c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe
4136	c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe
4136	c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1952 wrote to memory of 3928	1952	c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe	90
PID 1952 wrote to memory of 3928	1952	c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe	90
PID 1952 wrote to memory of 3928	1952	c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe	90
PID 1952 wrote to memory of 4136	1952	c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe	91
PID 1952 wrote to memory of 4136	1952	c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe	91
PID 1952 wrote to memory of 4136	1952	c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe	91

C:\Users\Admin\AppData\Local\Temp\c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe
"C:\Users\Admin\AppData\Local\Temp\c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1952
- C:\Windows\SysWOW64\icacls.exe
  icacls "C:\Users\Admin\AppData\Local\d7ee7c73-ed53-417d-8e1a-b9132bd0f954" /deny *S-1-1-0:(OI)(CI)(DE,DC)
  2⤵
  - Modifies file permissions
  - System Location Discovery: System Language Discovery
  PID:3928
- C:\Users\Admin\AppData\Local\Temp\c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe
  "C:\Users\Admin\AppData\Local\Temp\c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe" --Admin IsNotAutoStart IsNotTask
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:4136
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1952 -s 1972
  2⤵
  - Program crash
  PID:1072

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 1952 -ip 1952
1⤵
PID:4748

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

File and Directory Permissions Modification

T1222

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\8B2B9A00839EED1DFDCCC3BFC2F5DF12

Filesize
1KB

MD5
4a90329071ae30b759d279cca342b0a6

SHA1
0ac7c4f3357ce87f37a3a112d6878051c875eda5

SHA256
fb6a7c3edcd7b97fabc18855102a39fc4d6d3f82c0fdd39b1667807b71b9c49b

SHA512
f0e206053d4369437c2c0f1f90f0fd03d631e4b9859d807049b41efde823d64cf4d75c28316d932360f7c03bd409e923c8bc2d4f5959361feacecfcf101ae823

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B46811C17859FFB409CF0E904A4AA8F8

Filesize
530B

MD5
1fbb37f79b317a9a248e7c4ce4f5bac5

SHA1
0ff4d709ebf17be0c28e66dc8bf74672ca28362a

SHA256
6fb1b8e593cb0388f67ead35313a230f524657317ea86271b3a97362e5ec6ad9

SHA512
287e1d62c9ceb660965c266f677c467fbb997c2f5dcd1d63e185e266488aafc3489ac1d3feec81d10f01ce4a72e61a8bc4e124f137ce8675a220aa7797002e74

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8B2B9A00839EED1DFDCCC3BFC2F5DF12

Filesize
174B

MD5
10af3d496ce13bb4bd35cb5702c19d96

SHA1
e86d1fe7bcb15334fcefc89f4e9c19b6bc90942c

SHA256
625d10de8f8cb7448613b595b4983022e9689be43add5d153d6f44affa6dab5a

SHA512
adba18ae9e2c90a996d7c375397583030ec574b975858a4727a8294a486dff1ebf39343ae47e9c42c1f870679eff0ac200b836153f5b4c71e49f7120e0f1bac5

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B46811C17859FFB409CF0E904A4AA8F8

Filesize
170B

MD5
32c7563e1db168f8d2f359422208a743

SHA1
8edc3c70d3e645522947908812cd438259de6980

SHA256
62bb38aabbf3a60f98cbb40b45921e8343528e2075a868394299bf4fcc2864f5

SHA512
1160e9e99d6e48b0f59fef3813859ddbe3293762e4fe1a4e2a8670b16d21c6b00823761267d616475c2e437868645bf988e5a2918455d0de584e32a3cd37133e

Download Submit
C:\Users\Admin\AppData\Local\d7ee7c73-ed53-417d-8e1a-b9132bd0f954\c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe

Filesize
983KB

MD5
e15e3cfa542459e8d87e8bfdf70a38a1

SHA1
1c98fbf7b780fc8ab7f73d468ab77b41570c9665

SHA256
c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286

SHA512
fd55639cc4f757f90a01236b10bf33bd678ef7a141c6538a5285133aa8d610bb0bf287043717557a26d28a924f3c44fbf37c13421f27a389f2e8fc76ce4b91fe

Download Submit
memory/1952-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1952-2-0x0000000002450000-0x000000000256A000-memory.dmp

Filesize
1.1MB

Download
memory/1952-1-0x0000000002380000-0x000000000244A000-memory.dmp

Filesize
808KB

Download
memory/1952-19-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1952-20-0x0000000002450000-0x000000000256A000-memory.dmp

Filesize
1.1MB

Download
memory/4136-13-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4136-14-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4136-21-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4136-25-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4136-26-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download