simda | 0bc9c22ddc2ba03bb1e04a7a04812761c3bca4ae3956f760ef854762825c1799

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\userinit = "C:\\Windows\\system32\\userinit.exe,C:\\Users\\Admin\\AppData\\Local\\Temp\\9AA601~1.EXE,"	9aa60120b1c37bf537fed3e3618cd53f_JaffaCakes118.exe

Simda family
simda
simda
Simda is an infostealer written in C++.
stealer trojan simda

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3551809350-4263495960-1443967649-1000\Software\Microsoft\Windows\CurrentVersion\Run\userinit = "C:\\Users\\Admin\\AppData\\Local\\Temp\\9AA601~1.EXE"	9aa60120b1c37bf537fed3e3618cd53f_JaffaCakes118.exe

Modifies WinLogon 2 TTPs 2 IoCs

persistence

Winlogon Helper DLL

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\5a2b4407 = "ÂÛ=\x10ƒôû½ìùdc™Ž5·@\u008dLiŒ7©Í\"S7\x04Lê ìÐ™á‘)>\x18iºõ\x1b)m:Ž$PP\n\a€ÔýÝÍÕæL\t£üµ››·\x17àf®w^\x01ÒmKÀ\x14‘>Lh¬PIfîÎ6\u00ad}¾hxv]q\x18å)¸¨8F\x18€\x18Ø¨€IñPèÕ\x10\u00a0Èhõá°¨ŽÀ"	9aa60120b1c37bf537fed3e3618cd53f_JaffaCakes118.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\System = "C:\\Users\\Admin\\AppData\\Local\\Temp\\9AA601~1.EXE"	9aa60120b1c37bf537fed3e3618cd53f_JaffaCakes118.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2556	2700	WerFault.exe	29

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	9aa60120b1c37bf537fed3e3618cd53f_JaffaCakes118.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2700	9aa60120b1c37bf537fed3e3618cd53f_JaffaCakes118.exe
2700	9aa60120b1c37bf537fed3e3618cd53f_JaffaCakes118.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeSecurityPrivilege	2700	9aa60120b1c37bf537fed3e3618cd53f_JaffaCakes118.exe
Token: SeSecurityPrivilege	2700	9aa60120b1c37bf537fed3e3618cd53f_JaffaCakes118.exe
Token: SeSecurityPrivilege	2700	9aa60120b1c37bf537fed3e3618cd53f_JaffaCakes118.exe
Token: SeSecurityPrivilege	2700	9aa60120b1c37bf537fed3e3618cd53f_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2700 wrote to memory of 2556	2700	9aa60120b1c37bf537fed3e3618cd53f_JaffaCakes118.exe	30
PID 2700 wrote to memory of 2556	2700	9aa60120b1c37bf537fed3e3618cd53f_JaffaCakes118.exe	30
PID 2700 wrote to memory of 2556	2700	9aa60120b1c37bf537fed3e3618cd53f_JaffaCakes118.exe	30
PID 2700 wrote to memory of 2556	2700	9aa60120b1c37bf537fed3e3618cd53f_JaffaCakes118.exe	30

C:\Users\Admin\AppData\Local\Temp\9aa60120b1c37bf537fed3e3618cd53f_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\9aa60120b1c37bf537fed3e3618cd53f_JaffaCakes118.exe"
1⤵
- Modifies WinLogon for persistence
- Adds Run key to start application
- Modifies WinLogon
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2700
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2700 -s 432
  2⤵
  - Program crash
  PID:2556

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

3

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

2

Privilege Escalation

Boot or Logon Autostart Execution

3

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

2

Defense Evasion

Modify Registry

3

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery