3a2d9cf453c89b5e9f8ba8ad37e358a5cd3291a8698f1fb6625214d28754af64

Analysis

max time kernel
146s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
08/01/2024, 01:01

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
4a3c98653be09f933e30b0e7a70af105.exe
Size 15KB
Sample240108-bdhw9saed6
SHA256 3a2d9cf453c89b5e9f8ba8ad37e358a5cd3291a8698f1fb6625214d28754af64
MD5 4a3c98653be09f933e30b0e7a70af105
SHA1 345d57c831096f5e88ffeeac93afc66e472c34c3
SHA512 f420468653d2b063c9ebb6a3339a6fedff8c5a0fcb96766e5a1b383aa726e369edafe260eec31cf5a2d3d94005f147248b59fab0d3684f908d02e5ab9ac1e06f
SSDEEP 192:xT3ytdvCgHT8YktCeO00Svu/iseaVPVGoFPNEad56cKOenUoynxkmFEEgn:xTIKgHUXvu/i5YQoFPLocKOZbkLX
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

persistence

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = ",C:\\Windows\\4a3c98653be09f933e30b0e7a70af105.exe"	4a3c98653be09f933e30b0e7a70af105.exe

Executes dropped EXE 1 IoCs

pid	Process
5100	4a3c98653be09f933e30b0e7a70af105.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\4a3c98653be09f933e30b0e7a70af105.exe	4a3c98653be09f933e30b0e7a70af105.exe
File opened for modification	C:\Windows\4a3c98653be09f933e30b0e7a70af105.exe	4a3c98653be09f933e30b0e7a70af105.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4288	1624	WerFault.exe	14

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
5100	4a3c98653be09f933e30b0e7a70af105.exe
5100	4a3c98653be09f933e30b0e7a70af105.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5100	4a3c98653be09f933e30b0e7a70af105.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1624 wrote to memory of 5100	1624	4a3c98653be09f933e30b0e7a70af105.exe	18
PID 1624 wrote to memory of 5100	1624	4a3c98653be09f933e30b0e7a70af105.exe	18
PID 1624 wrote to memory of 5100	1624	4a3c98653be09f933e30b0e7a70af105.exe	18
PID 5100 wrote to memory of 3396	5100	4a3c98653be09f933e30b0e7a70af105.exe	50
PID 5100 wrote to memory of 3396	5100	4a3c98653be09f933e30b0e7a70af105.exe	50

C:\Users\Admin\AppData\Local\Temp\4a3c98653be09f933e30b0e7a70af105.exe
"C:\Users\Admin\AppData\Local\Temp\4a3c98653be09f933e30b0e7a70af105.exe"
1⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1624
- C:\Windows\4a3c98653be09f933e30b0e7a70af105.exe
  C:\Windows\4a3c98653be09f933e30b0e7a70af105.exe
  2⤵
  - Modifies WinLogon for persistence
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:5100
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1624 -s 704
  2⤵
  - Program crash
  PID:4288

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3396

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 208 -p 1624 -ip 1624
1⤵
PID:3740

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Winlogon Helper DLL

T1547.004

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

4a3c98653be09f933e30b0e7a70af105.exe

Path C:\Windows\4a3c98653be09f933e30b0e7a70af105.exe
Size 15KB
SHA256 3a2d9cf453c89b5e9f8ba8ad37e358a5cd3291a8698f1fb6625214d28754af64
MD5 4a3c98653be09f933e30b0e7a70af105
SHA1 345d57c831096f5e88ffeeac93afc66e472c34c3
SHA512 f420468653d2b063c9ebb6a3339a6fedff8c5a0fcb96766e5a1b383aa726e369edafe260eec31cf5a2d3d94005f147248b59fab0d3684f908d02e5ab9ac1e06f
SSDEEP 192:xT3ytdvCgHT8YktCeO00Svu/iseaVPVGoFPNEad56cKOenUoynxkmFEEgn:xTIKgHUXvu/i5YQoFPLocKOZbkLX
MD5 SHA1 SHA512 SSDEEP

Submit Download