e13289ab40e0f04991f9381da9540ef870d00891cc0b4fc71bd77a8673119d5d

Analysis

max time kernel
117s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
24/12/2023, 16:26

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General

Target

0598ad17b8be2fa8afd0ff8789c45f51.dll
Size

236KB
MD5

0598ad17b8be2fa8afd0ff8789c45f51
SHA1

c5c1ea8f70b7c3e20cb7d03fff312b23b58dcc57
SHA256

e13289ab40e0f04991f9381da9540ef870d00891cc0b4fc71bd77a8673119d5d
SHA512

83de74939a98ad8b1cb48599748132f8b26f9916291b0bd30cfe62dea72b6d62beae562b0570719855952af6a5f54a4ff4da4c8704e8bef2c8d9fffd7330f456
SSDEEP

3072:SeqmgHwlaazN9U3J+P0wFp+bLrt2wkkIf:+Qj9U3jwO3rt5w

Score

10^/10

persistence

Malware Config

Signatures

Adds autorun key to be loaded by Explorer.exe on startup 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad\qhowuahzx = "{492ee053-c1a6-16fb-d2b7-c1a668db9d13}"	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
3552	rundll32.exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\dubjhnumk.dll	rundll32.exe
File opened for modification	C:\Windows\SysWOW64\dubjhnumk.dll	rundll32.exe
File created	C:\Windows\SysWOW64\lcjrpvcus.dll	rundll32.exe
File opened for modification	C:\Windows\SysWOW64\lcjrpvcus.dll	rundll32.exe

Modifies registry class 5 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{492ee053-c1a6-16fb-d2b7-c1a668db9d13}	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{492ee053-c1a6-16fb-d2b7-c1a668db9d13}\	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{492ee053-c1a6-16fb-d2b7-c1a668db9d13}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{492ee053-c1a6-16fb-d2b7-c1a668db9d13}\InprocServer32\ = "C:\\Windows\\SysWow64\\lcjrpvcus.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{492ee053-c1a6-16fb-d2b7-c1a668db9d13}\InprocServer32\ThreadingModel = "Apartment"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3552	rundll32.exe
3552	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3552	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3552	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1880 wrote to memory of 3552	1880	rundll32.exe	14
PID 1880 wrote to memory of 3552	1880	rundll32.exe	14
PID 1880 wrote to memory of 3552	1880	rundll32.exe	14

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\0598ad17b8be2fa8afd0ff8789c45f51.dll,#1
1⤵
- Adds autorun key to be loaded by Explorer.exe on startup
- Loads dropped DLL
- Drops file in System32 directory
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:3552

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\0598ad17b8be2fa8afd0ff8789c45f51.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1880

Network

MITRE ATT&CK Enterprise v15

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\SysWOW64\dubjhnumk.dll

Filesize
83KB

MD5
05afb066565e1d9fee25704136fe6011

SHA1
17e8a72dc48acf49984f0d386f2eafc57e564292

SHA256
932282c35f93d09134987b94ffe63abb9c7b5fdf78415162f8f95e43e836dcd7

SHA512
168340db8fc343af619801d14027d85a4aba271289d4c0f4b1d048f98c1610be0e03cb3d85769158485bb831b06d9455b659cab8234000620a3b28b210b597a9

Download Submit
C:\Windows\SysWOW64\dubjhnumk.dll

Filesize
126KB

MD5
b5fdbc7c64a8aff80c81501e1809876b

SHA1
259fc7d72123f652c86cd3872f50c38eb57bade5

SHA256
72cd54113ae6fde4558fe75c91ed0aa48442e30fbfa98ef0ae7e2b5d84d63530

SHA512
31c8bd7ffc7367530f8a179d78aaa957e28d3f526884673ffe82131ff872e6bc0e482998e7e635cba36b531e23576629bc6cff839dd9fd891d65af4f37f8e9fc

Download Submit
memory/3552-7-0x0000000076830000-0x00000000768AA000-memory.dmp

Filesize
488KB

Download
memory/3552-1-0x0000000000400000-0x0000000000444000-memory.dmp

Filesize
272KB

Download
memory/3552-11-0x0000000076830000-0x00000000768AA000-memory.dmp

Filesize
488KB

Download
memory/3552-10-0x0000000000400000-0x0000000000444000-memory.dmp

Filesize
272KB

Download