f74fdf8bab4f34e17d4296520bebfdf9e8fedc54ca36bef2ba0188e238f9a57b

Analysis

max time kernel
205s
max time network
205s
platform
windows10-2004_x64
resource
win10v2004-20240221-en
resource tags

arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
submitted
24-02-2024 15:27

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General

Target

a22f3b376007f00de176ef06161277fa.exe
Size

48KB
MD5

a22f3b376007f00de176ef06161277fa
SHA1

1dfcc52da270bb2b01cf20346a419cb8b12c5ddc
SHA256

f74fdf8bab4f34e17d4296520bebfdf9e8fedc54ca36bef2ba0188e238f9a57b
SHA512

36090cf557ed79470ed3dc998ca5209ae99040d656c99df96d3618128a14278a34fbe1e2e9d447115de4873002ecda2377b142851cdf7f02c3120b1f76f3fa50
SSDEEP

768:r96ZHtKypHPkT/MbpVYI18HoFNxTvWXbPQK2/sJuF171banFR+jT+9Lf4S3MZm3n:Yz/HMQbpSNqrTvWXEFQuF171bWR+P0PJ

Score

7^/10

persistence

Malware Config

Signatures

Loads dropped DLL 2 IoCs

pid	Process
1120	a22f3b376007f00de176ef06161277fa.exe
2296	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\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\MSServer = "rundll32.exe C:\\Windows\\system32\\pmnnNeFu.dll,#1"	rundll32.exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\ddcAstus.dll	a22f3b376007f00de176ef06161277fa.exe
File created	C:\Windows\SysWOW64\ddcAstus.dll	a22f3b376007f00de176ef06161277fa.exe
File created	C:\Windows\SysWOW64\pmnnNeFu.dll	a22f3b376007f00de176ef06161277fa.exe
File opened for modification	C:\Windows\SysWOW64\pmnnNeFu.dll	a22f3b376007f00de176ef06161277fa.exe

Modifies registry class 4 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{F088ADC9-094C-4180-A813-234FC6D7D703}	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{F088ADC9-094C-4180-A813-234FC6D7D703}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{F088ADC9-094C-4180-A813-234FC6D7D703}\InprocServer32\ = "C:\\Windows\\SysWow64\\pmnnNeFu.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{F088ADC9-094C-4180-A813-234FC6D7D703}\InprocServer32\ThreadingModel = "Both"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
1120	a22f3b376007f00de176ef06161277fa.exe
1120	a22f3b376007f00de176ef06161277fa.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1120	a22f3b376007f00de176ef06161277fa.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1120	a22f3b376007f00de176ef06161277fa.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1120 wrote to memory of 628	1120	a22f3b376007f00de176ef06161277fa.exe	6
PID 1120 wrote to memory of 2296	1120	a22f3b376007f00de176ef06161277fa.exe	91
PID 1120 wrote to memory of 2296	1120	a22f3b376007f00de176ef06161277fa.exe	91
PID 1120 wrote to memory of 2296	1120	a22f3b376007f00de176ef06161277fa.exe	91
PID 1120 wrote to memory of 2228	1120	a22f3b376007f00de176ef06161277fa.exe	92
PID 1120 wrote to memory of 2228	1120	a22f3b376007f00de176ef06161277fa.exe	92
PID 1120 wrote to memory of 2228	1120	a22f3b376007f00de176ef06161277fa.exe	92

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:628

C:\Users\Admin\AppData\Local\Temp\a22f3b376007f00de176ef06161277fa.exe
"C:\Users\Admin\AppData\Local\Temp\a22f3b376007f00de176ef06161277fa.exe"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1120
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Windows\system32\pmnnNeFu.dll,a
  2⤵
  - Loads dropped DLL
  - Adds Run key to start application
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  PID:2296
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\removalfile.bat "C:\Users\Admin\AppData\Local\Temp\a22f3b376007f00de176ef06161277fa.exe"
  2⤵
  PID:2228

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:\Users\Admin\AppData\Local\Temp\removalfile.bat

Filesize
43B

MD5
9a7ef09167a6f4433681b94351509043

SHA1
259b1375ed8e84943ca1d42646bb416325c89e12

SHA256
d5739a0510d89da572eb0b0d394d4fb4dd361cd9ee0144b9b31c590df93c3be7

SHA512
96b84cd88a0e4b7c1122af3ed6ce5edf0a9a4e9bf79575eadfac16b2c46f1278d57755d29f21d7c6dcb4403be24b7ac7da4837c6cc9c602342a8f2b8e54883df

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

Filesize
34KB

MD5
7ff799da23cc681a00516c0acd878c68

SHA1
0b3c438b36f6ab52aa2d2946aa1fbc2a90c60a24

SHA256
bf607b17970935088b3aa26a0174b3ce4af90b64b325772aa1441a0ccb5ea11e

SHA512
7d4ff4b2208d7c77e23313922658ac7b8322f0d1b9a732b171d3fb04a6c7d1926dd1f5acfe858443bc5ae55ff0dd08e507d822fa00fdcd941702b59bb971980e

Download Submit
memory/1120-11-0x0000000010000000-0x0000000010010000-memory.dmp

Filesize
64KB

Download
memory/1120-2-0x0000000000530000-0x0000000000536000-memory.dmp

Filesize
24KB

Download
memory/1120-8-0x0000000010000000-0x0000000010010000-memory.dmp

Filesize
64KB

Download
memory/1120-9-0x0000000002A80000-0x0000000002A85000-memory.dmp

Filesize
20KB

Download
memory/1120-0-0x0000000000400000-0x000000000040F000-memory.dmp

Filesize
60KB

Download
memory/1120-19-0x0000000002A80000-0x0000000002A85000-memory.dmp

Filesize
20KB

Download
memory/1120-1-0x0000000000400000-0x000000000040F000-memory.dmp

Filesize
60KB

Download
memory/2296-27-0x0000000010000000-0x0000000010010000-memory.dmp

Filesize
64KB

Download
memory/2296-28-0x0000000000600000-0x0000000000605000-memory.dmp

Filesize
20KB

Download
memory/2296-29-0x0000000010000000-0x0000000010010000-memory.dmp

Filesize
64KB

Download
memory/2296-31-0x0000000010000000-0x0000000010010000-memory.dmp

Filesize
64KB

Download