djvu | d91912b4b945e88e881e54573390e6723cfc41916b6546453b59e60f9beee337

Analysis

max time kernel
141s
max time network
130s
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, 02:19

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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
behavioral11/memory/5708-2-0x0000000002410000-0x000000000252A000-memory.dmp	family_djvu
behavioral11/memory/5708-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral11/memory/4108-14-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral11/memory/5708-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral11/memory/5708-20-0x0000000002410000-0x000000000252A000-memory.dmp	family_djvu
behavioral11/memory/4108-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral11/memory/4108-25-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral11/memory/4108-26-0x0000000000400000-0x0000000000537000-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-1-5-21-237734941-4188669080-153779821-1000\Control Panel\International\Geo\Nation	c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
1324	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-1-5-21-237734941-4188669080-153779821-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\77b0f379-cce3-437a-98b0-c5f5ce3f5b5a\\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
1	api.2ip.ua
2	api.2ip.ua
19	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
1344	5708	WerFault.exe	84

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
5708	c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe
5708	c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe
4108	c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe
4108	c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 5708 wrote to memory of 1324	5708	c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe	88
PID 5708 wrote to memory of 1324	5708	c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe	88
PID 5708 wrote to memory of 1324	5708	c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe	88
PID 5708 wrote to memory of 4108	5708	c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe	89
PID 5708 wrote to memory of 4108	5708	c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe	89
PID 5708 wrote to memory of 4108	5708	c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe	89

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:5708
- C:\Windows\SysWOW64\icacls.exe
  icacls "C:\Users\Admin\AppData\Local\77b0f379-cce3-437a-98b0-c5f5ce3f5b5a" /deny *S-1-1-0:(OI)(CI)(DE,DC)
  2⤵
  - Modifies file permissions
  - System Location Discovery: System Language Discovery
  PID:1324
- 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:4108
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5708 -s 1600
  2⤵
  - Program crash
  PID:1344

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 5708 -ip 5708
1⤵
PID:5680

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

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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
ce15e5c8d280936ed710404ee523ccef

SHA1
f3f878849913966aa2aa884f4e0c691d808fbca3

SHA256
7f4f2cb3eec02814524c263b3d081e243e1eaf777c42fedf4e1da086eaff3284

SHA512
53a05b01ad96ca7771d10ddbaef0161f70c22827921c46330dd801db587af0a0c7a5fdadd888de33cf0326162117f33a0112f45eb31889e619fe7080605ced31

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

Filesize
170B

MD5
a95a68378bce827291d03dab84b7dd48

SHA1
1f8f40a2f9aa8b7d42942fb5f5635a44f044fce9

SHA256
d6c85eda3ce236042f7fd52e012949731f18ba740edddaa8884ba19026e17642

SHA512
5b2f40bc6427c83e81e4647d02df64510752bad5affa38aa2866b4f6a802a497b8dec4f5ea62936a6e6613ab2cc7aea522e2e3663debee12597bcef0c45a8c83

Download Submit
C:\Users\Admin\AppData\Local\77b0f379-cce3-437a-98b0-c5f5ce3f5b5a\c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe

Filesize
983KB

MD5
e15e3cfa542459e8d87e8bfdf70a38a1

SHA1
1c98fbf7b780fc8ab7f73d468ab77b41570c9665

SHA256
c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286

SHA512
fd55639cc4f757f90a01236b10bf33bd678ef7a141c6538a5285133aa8d610bb0bf287043717557a26d28a924f3c44fbf37c13421f27a389f2e8fc76ce4b91fe

Download Submit
memory/4108-13-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4108-14-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4108-21-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4108-25-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4108-26-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/5708-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/5708-2-0x0000000002410000-0x000000000252A000-memory.dmp

Filesize
1.1MB

Download
memory/5708-1-0x0000000002340000-0x0000000002408000-memory.dmp

Filesize
800KB

Download
memory/5708-19-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/5708-20-0x0000000002410000-0x000000000252A000-memory.dmp

Filesize
1.1MB

Download