854e55541ca15e0544812a906d68398832b2db88834021d1630c12ea8f194bc1

General

Target
jaffacakes118_854e55541ca15e0544812a906d68398832b2db88834021d1630c12ea8f194bc1.exe
Size 64KB
Sample260930-l6f89awsas
SHA256 854e55541ca15e0544812a906d68398832b2db88834021d1630c12ea8f194bc1
MD5 5f40356106244de5ae356b8024b51f83
SHA1 f683023df0441fca528e34bbefd59d82d2260790
SHA512 1e74c30adeb2ab9313e8d26ececf57118d4572658fdf5aaeb6adbe3c0be73d8fc106a60baefb2e5ad468b9a8ef274bcd8f2f33e91fa8d3825482392ba7b6f518
SSDEEP 1536:qffRHe1qRMI/1wz8a0gyz8CXZ5ym2NmFuEHBJkPEHp:qf3RMI/Kz8eCJIfoFuwTkPEHp
TLSH
T1F453BF06E1CB486ADC81DC3902E19F364426A4F225755EFE8FD48FF9382D16DE5361CA
MD5 SHA1 SHA512 SSDEEP TLSH

Score

7^/10

defense_evasion discovery execution

Malware Config

Signatures

Deletes itself 1 TTPs 1 IoCs

defense_evasion

File Deletion

T1070.004

pid	Process
2412	rundll32.exe

Disables service(s) 3 TTPs
defense_evasion execution

Windows Service
T1543.003

Service Stop
T1489

Service Execution
T1569.002

Loads dropped DLL 1 IoCs

pid	Process
2412	rundll32.exe

Stops running service(s) 4 TTPs
defense_evasion execution

Windows Service
T1543.003

Impair Defenses
T1562

Service Stop
T1489

Service Execution
T1569.002

Drops file in System32 directory 11 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\yuksuser.dll	jaffacakes118_854e55541ca15e0544812a906d68398832b2db88834021d1630c12ea8f194bc1.exe
File opened for modification	C:\Windows\SysWOW64\yuksuser.dll	jaffacakes118_854e55541ca15e0544812a906d68398832b2db88834021d1630c12ea8f194bc1.exe
File created	C:\Windows\SysWOW64\ksuser.dll	jaffacakes118_854e55541ca15e0544812a906d68398832b2db88834021d1630c12ea8f194bc1.exe
File created	C:\Windows\SysWOW64\dllcache\ksuser.dll	jaffacakes118_854e55541ca15e0544812a906d68398832b2db88834021d1630c12ea8f194bc1.exe
File created	C:\Windows\SysWOW64\yumidimap.dll	jaffacakes118_854e55541ca15e0544812a906d68398832b2db88834021d1630c12ea8f194bc1.exe
File created	C:\Windows\SysWOW64\yumsimg32.dll	jaffacakes118_854e55541ca15e0544812a906d68398832b2db88834021d1630c12ea8f194bc1.exe
File created	C:\Windows\SysWOW64\msimg32.dll	jaffacakes118_854e55541ca15e0544812a906d68398832b2db88834021d1630c12ea8f194bc1.exe
File created	C:\Windows\SysWOW64\dllcache\msimg32.dll	jaffacakes118_854e55541ca15e0544812a906d68398832b2db88834021d1630c12ea8f194bc1.exe
File created	C:\Windows\SysWOW64\midimap.dll	jaffacakes118_854e55541ca15e0544812a906d68398832b2db88834021d1630c12ea8f194bc1.exe
File created	C:\Windows\SysWOW64\dllcache\midimap.dll	jaffacakes118_854e55541ca15e0544812a906d68398832b2db88834021d1630c12ea8f194bc1.exe
File created	C:\Windows\SysWOW64\sysapp29.dll	jaffacakes118_854e55541ca15e0544812a906d68398832b2db88834021d1630c12ea8f194bc1.exe

Launches sc.exe 2 IoCs

Sc.exe is a Windows utlilty to control services on the system.

pid	Process
4512	sc.exe
3480	sc.exe

System Location Discovery: System Language Discovery 1 TTPs 6 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	jaffacakes118_854e55541ca15e0544812a906d68398832b2db88834021d1630c12ea8f194bc1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	net.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	net1.exe

Runs net.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3964	jaffacakes118_854e55541ca15e0544812a906d68398832b2db88834021d1630c12ea8f194bc1.exe
3964	jaffacakes118_854e55541ca15e0544812a906d68398832b2db88834021d1630c12ea8f194bc1.exe
3964	jaffacakes118_854e55541ca15e0544812a906d68398832b2db88834021d1630c12ea8f194bc1.exe
3964	jaffacakes118_854e55541ca15e0544812a906d68398832b2db88834021d1630c12ea8f194bc1.exe
3964	jaffacakes118_854e55541ca15e0544812a906d68398832b2db88834021d1630c12ea8f194bc1.exe
3964	jaffacakes118_854e55541ca15e0544812a906d68398832b2db88834021d1630c12ea8f194bc1.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3964	jaffacakes118_854e55541ca15e0544812a906d68398832b2db88834021d1630c12ea8f194bc1.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 3964 wrote to memory of 4788	3964	jaffacakes118_854e55541ca15e0544812a906d68398832b2db88834021d1630c12ea8f194bc1.exe	87
PID 3964 wrote to memory of 3480	3964	jaffacakes118_854e55541ca15e0544812a906d68398832b2db88834021d1630c12ea8f194bc1.exe	88
PID 3964 wrote to memory of 4512	3964	jaffacakes118_854e55541ca15e0544812a906d68398832b2db88834021d1630c12ea8f194bc1.exe	89
PID 3964 wrote to memory of 2412	3964	jaffacakes118_854e55541ca15e0544812a906d68398832b2db88834021d1630c12ea8f194bc1.exe	92
PID 4788 wrote to memory of 4480	4788	net.exe	94

C:\Users\Admin\AppData\Local\Temp\jaffacakes118_854e55541ca15e0544812a906d68398832b2db88834021d1630c12ea8f194bc1.exe
"C:\Users\Admin\AppData\Local\Temp\jaffacakes118_854e55541ca15e0544812a906d68398832b2db88834021d1630c12ea8f194bc1.exe"
1⤵
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3964
- C:\Windows\SysWOW64\net.exe
  net stop cryptsvc
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4788
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop cryptsvc
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4480
- C:\Windows\SysWOW64\sc.exe
  sc config cryptsvc start= disabled
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3480
- C:\Windows\SysWOW64\sc.exe
  sc delete cryptsvc
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4512
- C:\Windows\SysWOW64\rundll32.exe
  C:\Users\Admin\AppData\Local\Temp\1790762917.dat, ServerMain c:\users\admin\appdata\local\temp\jaffacakes118_854e55541ca15e0544812a906d68398832b2db88834021d1630c12ea8f194bc1.exe
  2⤵
  - Deletes itself
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  PID:2412

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

System Services

2

T1569

Service Execution

2

T1569.002

Persistence

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Privilege Escalation

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Defense Evasion

Impair Defenses

1

T1562

Indicator Removal

1

T1070

File Deletion

1

T1070.004

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Service Stop

2

T1489

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Downloads

1790762917.dat

Path C:\Users\Admin\AppData\Local\Temp\1790762917.dat
Size 32KB
SHA256 e46261d5ca069072aaac2b8e32789a42259728b2616839fe4a61adb71a72e2fd
MD5 2317a50c84c1dc3f058ed4e9d1fb2cfb
SHA1 ea851baa082f016b6197e95465416c767feeb04d
SHA512 606f2b6c3183e9fc2f592970541c0cf4fde12df433168e4d74c41f9f4cc03b12101b14bc2749c4e25e1b3f1333f5f0908f89e1ec4a826ef1f868fb9a3bdbdadc
SSDEEP 768:RqLJLLEIkVf5/75L+vjGm4dA5oCR+wEHsLT:cLJL3kV175L+vjGmdNRfEHsP
TLSH
T1D0E25B137A4B89B2E2A2823136512BB99BFC68341E0715A9DB72D6871DB54C3DE36207
MD5 SHA1 SHA512 SSDEEP TLSH

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