41e3ca9433fb114e0a354c2e165ec36e1869fbbe71a34bdc4bdf1e67b2e175fe

Analysis

max time kernel
120s
max time network
142s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
30-12-2023 10:09

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

156bc530f752631a64bd470c23e86c7d.dll
Size

236KB
MD5

156bc530f752631a64bd470c23e86c7d
SHA1

275f370e92d56249f9a05c7bd6d68e410142471f
SHA256

41e3ca9433fb114e0a354c2e165ec36e1869fbbe71a34bdc4bdf1e67b2e175fe
SHA512

a40697c4306660065638cf09b2bd54d38475e5fdf858ac3a47c91220340ee0fea86d68b0c1eae322c52850b0d1cd9e39c7ecf4f01dfc7e2b9743ce5a1837f7da
SSDEEP

3072:SeqmgHwlaazN9U3J+P0wFp+bLrt2wkkI3:+Qj9U3jwO3rt5U

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\whhivjljg = "{ad90bf75-2518-7a6d-3629-251837fd6bde}"	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
2336	rundll32.exe

Drops file in System32 directory 4 IoCs

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

Modifies registry class 5 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{ad90bf75-2518-7a6d-3629-251837fd6bde}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{ad90bf75-2518-7a6d-3629-251837fd6bde}\InprocServer32\ = "C:\\Windows\\SysWow64\\rccdqegeb.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{ad90bf75-2518-7a6d-3629-251837fd6bde}\InprocServer32\ThreadingModel = "Apartment"	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{ad90bf75-2518-7a6d-3629-251837fd6bde}	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{ad90bf75-2518-7a6d-3629-251837fd6bde}\	rundll32.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2336	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2336	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2336	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2256 wrote to memory of 2336	2256	rundll32.exe	28
PID 2256 wrote to memory of 2336	2256	rundll32.exe	28
PID 2256 wrote to memory of 2336	2256	rundll32.exe	28
PID 2256 wrote to memory of 2336	2256	rundll32.exe	28
PID 2256 wrote to memory of 2336	2256	rundll32.exe	28
PID 2256 wrote to memory of 2336	2256	rundll32.exe	28
PID 2256 wrote to memory of 2336	2256	rundll32.exe	28

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\156bc530f752631a64bd470c23e86c7d.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2256
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\156bc530f752631a64bd470c23e86c7d.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:2336

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

Loading Replay Monitor...

Downloads

\Windows\SysWOW64\juuviwywt.dll

Filesize
625KB

MD5
95e2376b3323f062eb562b8586d0f14a

SHA1
453d4c3bf4a489433b593420a37bbffb7749875a

SHA256
bd3fa8750123d00aa0967fba44372c46ea002681da9c9b77a4f9261553e26017

SHA512
b898603d07a49237e4dfc6872d5caa7616bae1258926f10e66c4d3f0d81cccefac1e844395b65bb1f308fbc022061b52e51f60658d0a546c04b365b3428cc87d

Download Submit
memory/2336-0-0x0000000000400000-0x0000000000444000-memory.dmp

Filesize
272KB

Download
memory/2336-6-0x0000000075960000-0x0000000075A00000-memory.dmp

Filesize
640KB

Download
memory/2336-9-0x0000000075960000-0x0000000075A00000-memory.dmp

Filesize
640KB

Download
memory/2336-10-0x0000000000400000-0x0000000000444000-memory.dmp

Filesize
272KB

Download
memory/2336-11-0x0000000075960000-0x0000000075A00000-memory.dmp

Filesize
640KB

Download