zloader | d91912b4b945e88e881e54573390e6723cfc41916b6546453b59e60f9beee337

Analysis

max time kernel
101s
max time network
106s
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, 02:26

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General

Target

08751be484e1572995ebb085df1c2c6372084d63a64dce7fab28130d79a6ea2d.dll
Size

144KB
MD5

9e9bb42a965b89a9dce86c8b36b24799
SHA1

e2d1161ac7fa3420648ba59f7a5315ed0acb04c2
SHA256

08751be484e1572995ebb085df1c2c6372084d63a64dce7fab28130d79a6ea2d
SHA512

e5ba20e364c96260c821bc61eab51906e2075aa0d3755ef25aabfc8f6f9545452930be42d978d96e3a68e2b92120df4940b276c9872ebf36fa50913523c51ce8
SSDEEP

3072:ep1qwbk6Wbh/UR++pz1OBrNtZtHpspurmxwPtnneZY:epoP6WV/C116rNbtHpsYrmSP1neZY

Score

10^/10

zloader main 26.02.2020 botnet discovery persistence trojan

Malware Config

Extracted

Family

zloader

Botnet

main

Campaign

26.02.2020

https://airnaa.org/sound.php

https://banog.org/sound.php

https://rayonch.org/sound.php

Attributes

build_id
19

rc4.plain

Signatures

Zloader family
zloader
Zloader, Terdot, DELoader, ZeusSphinx
Zloader is a malware strain that was initially discovered back in August 2015.
trojan botnet zloader

Loads dropped DLL 1 IoCs

pid	Process
4744	rundll32.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-1-5-21-3674642747-2260306818-3009887879-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Uhgaif = "rundll32.exe C:\\Users\\Admin\\AppData\\Roaming\\Cuogbi\\geycfyud.dll,DllRegisterServer"	msiexec.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 328 set thread context of 4948	328	regsvr32.exe	86
PID 4744 set thread context of 4224	4744	rundll32.exe	94

System Location Discovery: System Language Discovery 1 TTPs 4 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	regsvr32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	msiexec.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	msiexec.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeSecurityPrivilege	4948	msiexec.exe
Token: SeSecurityPrivilege	4948	msiexec.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 3152 wrote to memory of 328	3152	regsvr32.exe	85
PID 3152 wrote to memory of 328	3152	regsvr32.exe	85
PID 3152 wrote to memory of 328	3152	regsvr32.exe	85
PID 328 wrote to memory of 4948	328	regsvr32.exe	86
PID 328 wrote to memory of 4948	328	regsvr32.exe	86
PID 328 wrote to memory of 4948	328	regsvr32.exe	86
PID 328 wrote to memory of 4948	328	regsvr32.exe	86
PID 328 wrote to memory of 4948	328	regsvr32.exe	86
PID 3684 wrote to memory of 1400	3684	cmd.exe	89
PID 3684 wrote to memory of 1400	3684	cmd.exe	89
PID 1400 wrote to memory of 4744	1400	rundll32.exe	90
PID 1400 wrote to memory of 4744	1400	rundll32.exe	90
PID 1400 wrote to memory of 4744	1400	rundll32.exe	90
PID 4744 wrote to memory of 4224	4744	rundll32.exe	94
PID 4744 wrote to memory of 4224	4744	rundll32.exe	94
PID 4744 wrote to memory of 4224	4744	rundll32.exe	94
PID 4744 wrote to memory of 4224	4744	rundll32.exe	94
PID 4744 wrote to memory of 4224	4744	rundll32.exe	94

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\08751be484e1572995ebb085df1c2c6372084d63a64dce7fab28130d79a6ea2d.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:3152
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\08751be484e1572995ebb085df1c2c6372084d63a64dce7fab28130d79a6ea2d.dll
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:328
- - C:\Windows\SysWOW64\msiexec.exe
    msiexec.exe
    3⤵
    - Adds Run key to start application
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:4948

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c rundll32.exe C:\Users\Admin\AppData\Roaming\Cuogbi\geycfyud.dll,DllRegisterServer
1⤵
- Suspicious use of WriteProcessMemory
PID:3684
- C:\Windows\system32\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Roaming\Cuogbi\geycfyud.dll,DllRegisterServer
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1400
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Roaming\Cuogbi\geycfyud.dll,DllRegisterServer
    3⤵
    - Loads dropped DLL
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:4744
  - - C:\Windows\SysWOW64\msiexec.exe
      msiexec.exe
      4⤵
      System Location Discovery: System Language Discovery
      PID:4224

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

Modify Registry

T1112

Credential Access

Discovery

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\Roaming\Cuogbi\geycfyud.dll

Filesize
144KB

MD5
9e9bb42a965b89a9dce86c8b36b24799

SHA1
e2d1161ac7fa3420648ba59f7a5315ed0acb04c2

SHA256
08751be484e1572995ebb085df1c2c6372084d63a64dce7fab28130d79a6ea2d

SHA512
e5ba20e364c96260c821bc61eab51906e2075aa0d3755ef25aabfc8f6f9545452930be42d978d96e3a68e2b92120df4940b276c9872ebf36fa50913523c51ce8

Download Submit
memory/4224-4-0x0000000000E50000-0x0000000000E75000-memory.dmp

Filesize
148KB

Download
memory/4948-0-0x0000000000C00000-0x0000000000C25000-memory.dmp

Filesize
148KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads