55c61d1035c3baf3c2f95b226518ad22befe356548eec0e0b45549b53a305359

General

Target

55c61d1035c3baf3c2f95b226518ad22befe356548eec0e0b45549b53a305359.exe
Size

330KB
MD5

8486d46bb72ad027f5a74138f24a93a0
SHA1

dacac93526809f512498222e0063522f3e6c89ae
SHA256

55c61d1035c3baf3c2f95b226518ad22befe356548eec0e0b45549b53a305359
SHA512

5f68dd3c4dcccef2b85c1ce1052249342f696254395c11d7a0644433efe0c6dbb1213bfef6c6a4c24df4b810eebeabc323a8a917f9f3a9e71946246ec8d58adc
SSDEEP

6144:eZrPQQbo0hcTkRB5RQ2RgkgFndytTnYfZfPehvOH5Wph:8rPo0KTkH5e2YdytjYdPek

Score

10^/10

persistence

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 2 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "\"C:\\Users\\Admin\\AppData\\Roaming\\winlogon.exe\\TVtQEuRsgeOs.exe\",explorer.exe"	55c61d1035c3baf3c2f95b226518ad22befe356548eec0e0b45549b53a305359.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "\"C:\\Users\\Admin\\AppData\\Roaming\\winlogon.exe\\BoWjmgRAEYII.exe\",explorer.exe"	55c61d1035c3baf3c2f95b226518ad22befe356548eec0e0b45549b53a305359.exe

Executes dropped EXE 2 IoCs

pid	Process
228	winlogon.exe
4012	winlogon.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1340 set thread context of 1520	1340	55c61d1035c3baf3c2f95b226518ad22befe356548eec0e0b45549b53a305359.exe	85
PID 1340 set thread context of 4012	1340	55c61d1035c3baf3c2f95b226518ad22befe356548eec0e0b45549b53a305359.exe	87

Suspicious behavior: EnumeratesProcesses 12 IoCs

pid	Process
1340	55c61d1035c3baf3c2f95b226518ad22befe356548eec0e0b45549b53a305359.exe
1340	55c61d1035c3baf3c2f95b226518ad22befe356548eec0e0b45549b53a305359.exe
1340	55c61d1035c3baf3c2f95b226518ad22befe356548eec0e0b45549b53a305359.exe
1340	55c61d1035c3baf3c2f95b226518ad22befe356548eec0e0b45549b53a305359.exe
1340	55c61d1035c3baf3c2f95b226518ad22befe356548eec0e0b45549b53a305359.exe
1340	55c61d1035c3baf3c2f95b226518ad22befe356548eec0e0b45549b53a305359.exe
1340	55c61d1035c3baf3c2f95b226518ad22befe356548eec0e0b45549b53a305359.exe
1340	55c61d1035c3baf3c2f95b226518ad22befe356548eec0e0b45549b53a305359.exe
1340	55c61d1035c3baf3c2f95b226518ad22befe356548eec0e0b45549b53a305359.exe
1340	55c61d1035c3baf3c2f95b226518ad22befe356548eec0e0b45549b53a305359.exe
1340	55c61d1035c3baf3c2f95b226518ad22befe356548eec0e0b45549b53a305359.exe
1340	55c61d1035c3baf3c2f95b226518ad22befe356548eec0e0b45549b53a305359.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1340	55c61d1035c3baf3c2f95b226518ad22befe356548eec0e0b45549b53a305359.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1520	55c61d1035c3baf3c2f95b226518ad22befe356548eec0e0b45549b53a305359.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 1340 wrote to memory of 4264	1340	55c61d1035c3baf3c2f95b226518ad22befe356548eec0e0b45549b53a305359.exe	84
PID 1340 wrote to memory of 4264	1340	55c61d1035c3baf3c2f95b226518ad22befe356548eec0e0b45549b53a305359.exe	84
PID 1340 wrote to memory of 4264	1340	55c61d1035c3baf3c2f95b226518ad22befe356548eec0e0b45549b53a305359.exe	84
PID 1340 wrote to memory of 1520	1340	55c61d1035c3baf3c2f95b226518ad22befe356548eec0e0b45549b53a305359.exe	85
PID 1340 wrote to memory of 1520	1340	55c61d1035c3baf3c2f95b226518ad22befe356548eec0e0b45549b53a305359.exe	85
PID 1340 wrote to memory of 1520	1340	55c61d1035c3baf3c2f95b226518ad22befe356548eec0e0b45549b53a305359.exe	85
PID 1340 wrote to memory of 1520	1340	55c61d1035c3baf3c2f95b226518ad22befe356548eec0e0b45549b53a305359.exe	85
PID 1340 wrote to memory of 1520	1340	55c61d1035c3baf3c2f95b226518ad22befe356548eec0e0b45549b53a305359.exe	85
PID 1340 wrote to memory of 1520	1340	55c61d1035c3baf3c2f95b226518ad22befe356548eec0e0b45549b53a305359.exe	85
PID 1340 wrote to memory of 1520	1340	55c61d1035c3baf3c2f95b226518ad22befe356548eec0e0b45549b53a305359.exe	85
PID 1340 wrote to memory of 1520	1340	55c61d1035c3baf3c2f95b226518ad22befe356548eec0e0b45549b53a305359.exe	85
PID 1340 wrote to memory of 228	1340	55c61d1035c3baf3c2f95b226518ad22befe356548eec0e0b45549b53a305359.exe	86
PID 1340 wrote to memory of 228	1340	55c61d1035c3baf3c2f95b226518ad22befe356548eec0e0b45549b53a305359.exe	86
PID 1340 wrote to memory of 228	1340	55c61d1035c3baf3c2f95b226518ad22befe356548eec0e0b45549b53a305359.exe	86
PID 1340 wrote to memory of 4012	1340	55c61d1035c3baf3c2f95b226518ad22befe356548eec0e0b45549b53a305359.exe	87
PID 1340 wrote to memory of 4012	1340	55c61d1035c3baf3c2f95b226518ad22befe356548eec0e0b45549b53a305359.exe	87
PID 1340 wrote to memory of 4012	1340	55c61d1035c3baf3c2f95b226518ad22befe356548eec0e0b45549b53a305359.exe	87
PID 1340 wrote to memory of 4012	1340	55c61d1035c3baf3c2f95b226518ad22befe356548eec0e0b45549b53a305359.exe	87
PID 1340 wrote to memory of 4012	1340	55c61d1035c3baf3c2f95b226518ad22befe356548eec0e0b45549b53a305359.exe	87
PID 1340 wrote to memory of 4012	1340	55c61d1035c3baf3c2f95b226518ad22befe356548eec0e0b45549b53a305359.exe	87
PID 1340 wrote to memory of 4012	1340	55c61d1035c3baf3c2f95b226518ad22befe356548eec0e0b45549b53a305359.exe	87
PID 1340 wrote to memory of 4012	1340	55c61d1035c3baf3c2f95b226518ad22befe356548eec0e0b45549b53a305359.exe	87

C:\Users\Admin\AppData\Local\Temp\55c61d1035c3baf3c2f95b226518ad22befe356548eec0e0b45549b53a305359.exe
"C:\Users\Admin\AppData\Local\Temp\55c61d1035c3baf3c2f95b226518ad22befe356548eec0e0b45549b53a305359.exe"
1⤵
- Modifies WinLogon for persistence
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1340
- C:\Users\Admin\AppData\Local\Temp\55c61d1035c3baf3c2f95b226518ad22befe356548eec0e0b45549b53a305359.exe
  "C:\Users\Admin\AppData\Local\Temp\55c61d1035c3baf3c2f95b226518ad22befe356548eec0e0b45549b53a305359.exe"
  2⤵
  PID:4264
- C:\Users\Admin\AppData\Local\Temp\55c61d1035c3baf3c2f95b226518ad22befe356548eec0e0b45549b53a305359.exe
  "C:\Users\Admin\AppData\Local\Temp\55c61d1035c3baf3c2f95b226518ad22befe356548eec0e0b45549b53a305359.exe"
  2⤵
  - Suspicious use of SetWindowsHookEx
  PID:1520
- C:\Users\Admin\AppData\Local\Temp\h0z57uLqmKP5kw1u\winlogon.exe
  "C:\Users\Admin\AppData\Local\Temp\h0z57uLqmKP5kw1u\winlogon.exe"
  2⤵
  - Executes dropped EXE
  PID:228
- C:\Users\Admin\AppData\Local\Temp\h0z57uLqmKP5kw1u\winlogon.exe
  "C:\Users\Admin\AppData\Local\Temp\h0z57uLqmKP5kw1u\winlogon.exe"
  2⤵
  - Executes dropped EXE
  PID:4012

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

1

T1004

Privilege Escalation

Defense Evasion

Modify Registry

1

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\h0z57uLqmKP5kw1u\winlogon.exe

Filesize
330KB

MD5
8486d46bb72ad027f5a74138f24a93a0

SHA1
dacac93526809f512498222e0063522f3e6c89ae

SHA256
55c61d1035c3baf3c2f95b226518ad22befe356548eec0e0b45549b53a305359

SHA512
5f68dd3c4dcccef2b85c1ce1052249342f696254395c11d7a0644433efe0c6dbb1213bfef6c6a4c24df4b810eebeabc323a8a917f9f3a9e71946246ec8d58adc

Download Submit
C:\Users\Admin\AppData\Local\Temp\h0z57uLqmKP5kw1u\winlogon.exe

Filesize
330KB

MD5
8486d46bb72ad027f5a74138f24a93a0

SHA1
dacac93526809f512498222e0063522f3e6c89ae

SHA256
55c61d1035c3baf3c2f95b226518ad22befe356548eec0e0b45549b53a305359

SHA512
5f68dd3c4dcccef2b85c1ce1052249342f696254395c11d7a0644433efe0c6dbb1213bfef6c6a4c24df4b810eebeabc323a8a917f9f3a9e71946246ec8d58adc

Download Submit
C:\Users\Admin\AppData\Local\Temp\h0z57uLqmKP5kw1u\winlogon.exe

Filesize
330KB

MD5
8486d46bb72ad027f5a74138f24a93a0

SHA1
dacac93526809f512498222e0063522f3e6c89ae

SHA256
55c61d1035c3baf3c2f95b226518ad22befe356548eec0e0b45549b53a305359

SHA512
5f68dd3c4dcccef2b85c1ce1052249342f696254395c11d7a0644433efe0c6dbb1213bfef6c6a4c24df4b810eebeabc323a8a917f9f3a9e71946246ec8d58adc

Download Submit
memory/228-136-0x0000000000000000-mapping.dmp

Download
memory/1340-144-0x0000000074D00000-0x00000000752B1000-memory.dmp

Filesize
5.7MB

Download
memory/1340-132-0x0000000074D00000-0x00000000752B1000-memory.dmp

Filesize
5.7MB

Download
memory/1520-135-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/1520-134-0x0000000000000000-mapping.dmp

Download
memory/1520-143-0x0000000074D00000-0x00000000752B1000-memory.dmp

Filesize
5.7MB

Download
memory/1520-145-0x0000000074D00000-0x00000000752B1000-memory.dmp

Filesize
5.7MB

Download
memory/4012-138-0x0000000000000000-mapping.dmp

Download
memory/4012-142-0x0000000074D00000-0x00000000752B1000-memory.dmp

Filesize
5.7MB

Download
memory/4264-133-0x0000000000000000-mapping.dmp

Download

Analysis

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