d3ab4fdc157beccbe0b4c8715302a923974fbba6a6255513a282b19836316977

Analysis

max time kernel
119s
max time network
125s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
11-01-2024 11:15

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General

Target

535e3bd19e7ca45eb301a562bc29d360.dll
Size

236KB
MD5

535e3bd19e7ca45eb301a562bc29d360
SHA1

c167bfa101b015adfeb9c753405451118f121ada
SHA256

d3ab4fdc157beccbe0b4c8715302a923974fbba6a6255513a282b19836316977
SHA512

44ce4b0de5ed72f9af8d07ff87118610e60d0535356b1f8788081cd30ef8ee579e698cc8c63ed3b0b9e9fa8f2ba6b31f817ee257725703915e82ab50a96420db
SSDEEP

1536:1dKaTHN2ymZ0ofa5uQm4V7HG8ldINh+RhFtFftCgpcGO5lPf/XG8GmGwktbm:1Y4tIQG8XAmbFfaGc1fawk1m

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\whhdoghgk = "{6ddbaabe-e553-3aa8-f664-e55322362ec3}"	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
2304	rundll32.exe

Drops file in System32 directory 4 IoCs

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

Modifies registry class 5 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{6ddbaabe-e553-3aa8-f664-e55322362ec3}	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{6ddbaabe-e553-3aa8-f664-e55322362ec3}\	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{6ddbaabe-e553-3aa8-f664-e55322362ec3}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{6ddbaabe-e553-3aa8-f664-e55322362ec3}\InprocServer32\ = "C:\\Windows\\SysWow64\\rccyjbcbf.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{6ddbaabe-e553-3aa8-f664-e55322362ec3}\InprocServer32\ThreadingModel = "Apartment"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2304	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2304	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2304	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 760 wrote to memory of 2304	760	rundll32.exe	28
PID 760 wrote to memory of 2304	760	rundll32.exe	28
PID 760 wrote to memory of 2304	760	rundll32.exe	28
PID 760 wrote to memory of 2304	760	rundll32.exe	28
PID 760 wrote to memory of 2304	760	rundll32.exe	28
PID 760 wrote to memory of 2304	760	rundll32.exe	28
PID 760 wrote to memory of 2304	760	rundll32.exe	28

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\535e3bd19e7ca45eb301a562bc29d360.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:760
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\535e3bd19e7ca45eb301a562bc29d360.dll,#1
  2⤵
  - 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:2304

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

\Windows\SysWOW64\juuqbtutx.dll

Filesize
625KB

MD5
95e2376b3323f062eb562b8586d0f14a

SHA1
453d4c3bf4a489433b593420a37bbffb7749875a

SHA256
bd3fa8750123d00aa0967fba44372c46ea002681da9c9b77a4f9261553e26017

SHA512
b898603d07a49237e4dfc6872d5caa7616bae1258926f10e66c4d3f0d81cccefac1e844395b65bb1f308fbc022061b52e51f60658d0a546c04b365b3428cc87d

Download Submit
memory/2304-0-0x0000000000270000-0x00000000002B4000-memory.dmp

Filesize
272KB

Download
memory/2304-1-0x0000000000270000-0x00000000002B4000-memory.dmp

Filesize
272KB

Download
memory/2304-7-0x00000000767D0000-0x0000000076870000-memory.dmp

Filesize
640KB

Download
memory/2304-10-0x0000000000270000-0x00000000002B4000-memory.dmp

Filesize
272KB

Download
memory/2304-11-0x00000000767D0000-0x0000000076870000-memory.dmp

Filesize
640KB

Download