5fc66f1bc8952553492dad6545e6a958bbc9eb068d39df37ae4ac61981b36dff

General

Target
jaffacakes118_5fc66f1bc8952553492dad6545e6a958bbc9eb068d39df37ae4ac61981b36dff.exe
Size 64KB
Sample260924-mcdfyabb69
SHA256 5fc66f1bc8952553492dad6545e6a958bbc9eb068d39df37ae4ac61981b36dff
MD5 36b8c46cef64371f2961fd42c23b9823
SHA1 d52b1ceb4484d0294642c1b07bbba0921bdbdd2f
SHA512 28c1efd79fca7756c58df58966d6b06b6c7e7eeade0b9719fa01c5b27bef5559407379e2b496b12a5f836347dfc46f18beaa2782766287d615f9f624038a374d
SSDEEP 1536:cFRVTcEtSQACTM+fWcVSHzAUNpdIHHMX5:cFDcUSQAAM+HSpdIHHMX5
TLSH
T1E5536C06D9CB0067DC11DD3C12E25BB84462A5F229795EFE9FC48FB8B42D259D2372C9
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
2868	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
2868	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_5fc66f1bc8952553492dad6545e6a958bbc9eb068d39df37ae4ac61981b36dff.exe
File opened for modification	C:\Windows\SysWOW64\yuksuser.dll	jaffacakes118_5fc66f1bc8952553492dad6545e6a958bbc9eb068d39df37ae4ac61981b36dff.exe
File created	C:\Windows\SysWOW64\ksuser.dll	jaffacakes118_5fc66f1bc8952553492dad6545e6a958bbc9eb068d39df37ae4ac61981b36dff.exe
File created	C:\Windows\SysWOW64\yumidimap.dll	jaffacakes118_5fc66f1bc8952553492dad6545e6a958bbc9eb068d39df37ae4ac61981b36dff.exe
File created	C:\Windows\SysWOW64\midimap.dll	jaffacakes118_5fc66f1bc8952553492dad6545e6a958bbc9eb068d39df37ae4ac61981b36dff.exe
File created	C:\Windows\SysWOW64\yumsimg32.dll	jaffacakes118_5fc66f1bc8952553492dad6545e6a958bbc9eb068d39df37ae4ac61981b36dff.exe
File created	C:\Windows\SysWOW64\msimg32.dll	jaffacakes118_5fc66f1bc8952553492dad6545e6a958bbc9eb068d39df37ae4ac61981b36dff.exe
File created	C:\Windows\SysWOW64\dllcache\msimg32.dll	jaffacakes118_5fc66f1bc8952553492dad6545e6a958bbc9eb068d39df37ae4ac61981b36dff.exe
File created	C:\Windows\SysWOW64\dllcache\ksuser.dll	jaffacakes118_5fc66f1bc8952553492dad6545e6a958bbc9eb068d39df37ae4ac61981b36dff.exe
File created	C:\Windows\SysWOW64\dllcache\midimap.dll	jaffacakes118_5fc66f1bc8952553492dad6545e6a958bbc9eb068d39df37ae4ac61981b36dff.exe
File created	C:\Windows\SysWOW64\sysapp44.dll	jaffacakes118_5fc66f1bc8952553492dad6545e6a958bbc9eb068d39df37ae4ac61981b36dff.exe

Launches sc.exe 2 IoCs

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

pid	Process
768	sc.exe
4948	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_5fc66f1bc8952553492dad6545e6a958bbc9eb068d39df37ae4ac61981b36dff.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	net.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	net1.exe

Runs net.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4820	jaffacakes118_5fc66f1bc8952553492dad6545e6a958bbc9eb068d39df37ae4ac61981b36dff.exe
4820	jaffacakes118_5fc66f1bc8952553492dad6545e6a958bbc9eb068d39df37ae4ac61981b36dff.exe
4820	jaffacakes118_5fc66f1bc8952553492dad6545e6a958bbc9eb068d39df37ae4ac61981b36dff.exe
4820	jaffacakes118_5fc66f1bc8952553492dad6545e6a958bbc9eb068d39df37ae4ac61981b36dff.exe
4820	jaffacakes118_5fc66f1bc8952553492dad6545e6a958bbc9eb068d39df37ae4ac61981b36dff.exe
4820	jaffacakes118_5fc66f1bc8952553492dad6545e6a958bbc9eb068d39df37ae4ac61981b36dff.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4820	jaffacakes118_5fc66f1bc8952553492dad6545e6a958bbc9eb068d39df37ae4ac61981b36dff.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4820 wrote to memory of 760	4820	jaffacakes118_5fc66f1bc8952553492dad6545e6a958bbc9eb068d39df37ae4ac61981b36dff.exe	86
PID 4820 wrote to memory of 4948	4820	jaffacakes118_5fc66f1bc8952553492dad6545e6a958bbc9eb068d39df37ae4ac61981b36dff.exe	87
PID 4820 wrote to memory of 768	4820	jaffacakes118_5fc66f1bc8952553492dad6545e6a958bbc9eb068d39df37ae4ac61981b36dff.exe	88
PID 4820 wrote to memory of 2868	4820	jaffacakes118_5fc66f1bc8952553492dad6545e6a958bbc9eb068d39df37ae4ac61981b36dff.exe	90
PID 760 wrote to memory of 3348	760	net.exe	93

C:\Users\Admin\AppData\Local\Temp\jaffacakes118_5fc66f1bc8952553492dad6545e6a958bbc9eb068d39df37ae4ac61981b36dff.exe
"C:\Users\Admin\AppData\Local\Temp\jaffacakes118_5fc66f1bc8952553492dad6545e6a958bbc9eb068d39df37ae4ac61981b36dff.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:4820
- C:\Windows\SysWOW64\net.exe
  net stop cryptsvc
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:760
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop cryptsvc
    3⤵
    - System Location Discovery: System Language Discovery
    PID:3348
- C:\Windows\SysWOW64\sc.exe
  sc config cryptsvc start= disabled
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4948
- C:\Windows\SysWOW64\sc.exe
  sc delete cryptsvc
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:768
- C:\Windows\SysWOW64\rundll32.exe
  C:\Users\Admin\AppData\Local\Temp\1790245254.dat, ServerMain c:\users\admin\appdata\local\temp\jaffacakes118_5fc66f1bc8952553492dad6545e6a958bbc9eb068d39df37ae4ac61981b36dff.exe
  2⤵
  - Deletes itself
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  PID:2868

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

1790245254.dat

Path C:\Users\Admin\AppData\Local\Temp\1790245254.dat
Size 32KB
SHA256 7c23866e2f93949392f4976f4d9b69f03246414cec205ae39a53a90836a4af93
MD5 fa6be5cf7233e2766b65ffac7abadac2
SHA1 c3fd6f981e988a59594e9372abdbec994f26b28d
SHA512 32483d76ee15a58dfd046b76b44036090577d85cf44fdcbf5cf625f73a55ee677cce0965ec6c4a8f59fade40feb99eb2b20fa253b5c0b87dc18c40b9fbeb24d2
SSDEEP 768:WMhqpHLSlNb31pbNG7v6fbZOVO9KTR8Mu8Xco:LqpA1pQ7ifbKpR8Mu8X3
TLSH
T126E25B127A4785B2D192813076452BB59FFC28301A1665A9DF728B5F1E71AC6EB3B203
MD5 SHA1 SHA512 SSDEEP TLSH

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