3a81661b4f7e5d2e44847a52b46b49fb92fa2e12a4e3ab63df4b248966397567

General

Target
4797668cd0a042063e3d2f34aaf3333c_JaffaCakes118.exe
Size 145KB
Sample240715-bkbfrstekc
SHA256 3a81661b4f7e5d2e44847a52b46b49fb92fa2e12a4e3ab63df4b248966397567
MD5 4797668cd0a042063e3d2f34aaf3333c
SHA1 fdf90f965acbee58ee8e31fa62ddb657cfc12eb0
SHA512 1deb315b1bed701b191a0454d44fde877b1712215864c2274c0df29f6ed6c5e91f59a563fe7864252d5f201ea27ba6532b2b217a117a36a211261321fb241f4c
SSDEEP 3072:3R1+aJe1mgawzxsBub861jIHxowR1sxn8xfyRGF27T+Ihi0Mbk6/pb8DEc3OjQD8:3RUTV5ny1sl44FMbkm5c3rZFPM0pjmbp
MD5 SHA1 SHA512 SSDEEP

Score

8^/10

persistence privilege_escalation

Malware Config

Signatures

Event Triggered Execution: AppInit DLLs 1 TTPs
Adversaries may establish persistence and/or elevate privileges by executing malicious content triggered by AppInit DLLs loaded into processes.
persistence privilege_escalation

AppInit DLLs
T1546.010

Executes dropped EXE 1 IoCs

pid	Process
1224	serv.exe

Loads dropped DLL 3 IoCs

pid	Process
1224	serv.exe
1224	serv.exe
1224	serv.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\serv = "C:\\Windows\\serv.exe s"	serv.exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\kbdkwmas.dll	serv.exe
File created	C:\Windows\SysWOW64\mscowmsd.exe	serv.exe
File created	C:\Windows\SysWOW64\msvcwuap.dll	serv.exe
File created	C:\Windows\SysWOW64\e1.dll	serv.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\serv.exe	4797668cd0a042063e3d2f34aaf3333c_JaffaCakes118.exe
File created	C:\Windows\serv.dll	serv.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
4612	notepad.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1224	serv.exe
1224	serv.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1224	serv.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1224	serv.exe
1224	serv.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1464 wrote to memory of 1224	1464	4797668cd0a042063e3d2f34aaf3333c_JaffaCakes118.exe	89
PID 1464 wrote to memory of 1224	1464	4797668cd0a042063e3d2f34aaf3333c_JaffaCakes118.exe	89
PID 1464 wrote to memory of 1224	1464	4797668cd0a042063e3d2f34aaf3333c_JaffaCakes118.exe	89
PID 1464 wrote to memory of 4612	1464	4797668cd0a042063e3d2f34aaf3333c_JaffaCakes118.exe	90
PID 1464 wrote to memory of 4612	1464	4797668cd0a042063e3d2f34aaf3333c_JaffaCakes118.exe	90
PID 1464 wrote to memory of 4612	1464	4797668cd0a042063e3d2f34aaf3333c_JaffaCakes118.exe	90
PID 1224 wrote to memory of 3428	1224	serv.exe	56

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3428
- C:\Users\Admin\AppData\Local\Temp\4797668cd0a042063e3d2f34aaf3333c_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\4797668cd0a042063e3d2f34aaf3333c_JaffaCakes118.exe"
  2⤵
  - Drops file in Windows directory
  - Suspicious use of WriteProcessMemory
  PID:1464
- - C:\Windows\serv.exe
    C:\Windows\serv.exe s
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Adds Run key to start application
    - Drops file in System32 directory
    - Drops file in Windows directory
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1224
- - C:\Windows\SysWOW64\notepad.exe
    C:\Windows\System32\notepad.exe C:\Users\Admin\AppData\Local\Temp\824F.tmp
    3⤵
    - Opens file in notepad (likely ransom note)
    PID:4612

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Event Triggered Execution

1

T1546

AppInit DLLs

1

T1546.010

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Event Triggered Execution

1

T1546

AppInit DLLs

1

T1546.010

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

824F.tmp

Path C:\Users\Admin\AppData\Local\Temp\824F.tmp
Size 65KB
SHA256 c546388480e575816370ca9614a23241ecb885094bd3a4f64aae43574d0cd113
MD5 a1443bcab5fdf3e3cc70485ff9a1ba7c
SHA1 2e7f79fe403030bf3487169bd3e233a6e432c48c
SHA512 3aa1a1cb844863409976b2139f101d9e91dcf16b83517eb0b81de63e99c38af7236f64281bd802353843b59c47ecbf01760bbac236a1459db7861aae59124458
SSDEEP 1536:enfGhVavdo+LAOv0HMfmAHkuUFuyhrW8NZxbK:eWV+nLAy+8m8kuUgCi8s
MD5 SHA1 SHA512 SSDEEP

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msvcwuap.dll

Path C:\Windows\SysWOW64\msvcwuap.dll
Size 20KB
SHA256 1bcb085f7d3507ad1966427eee490c18a1df054d9262ccedf6b3e4230befdbb7
MD5 f76d28f5028944a79b35ff1eceda8e97
SHA1 ecd7ab75eb98fe8b424bdc2f9bead7045eb95b46
SHA512 ab5addcdfd097e48ec6c17f79955f3b77ecdfa33e572a1cb49cba4114998ea7da5e417fc38de4d378c5b7b2cbf925e4751ab8d6936136315ca048e16e8296f0e
SSDEEP 192:DroYYWWX3zJdQ2AZ0bpQK7hzx7XvWf0BojSp/uMPw4tlBeGVZeWEZ3Jz11:Dr70XVS20upQK9z1X2Spn44tDzZe/J
MD5 SHA1 SHA512 SSDEEP

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serv.dll

Path C:\Windows\serv.dll
Size 7KB
SHA256 8e83d6374ee37f26b1f10040df7bdba87768a1ee802893a72ed3fd4e128d2cd7
MD5 348b8714e4a6c47615b24eac4f6caf55
SHA1 cbcaa8b7ca3406bc488624129bb4551fc09dceff
SHA512 6001547ee3bbf313791032f3ab3b4f5be31c1e869966df9b6b66d82b4aa405ac5fc86c0d162824af48cce0fb0f821df09912bb8f0f5baf81f4b53b8574658474
SSDEEP 96:VbDGVYV+FILR0X0tsL4XjHKS8w6DpaSNZXxb:V1VZLm0s1S8lP
MD5 SHA1 SHA512 SSDEEP

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serv.exe

Path C:\Windows\serv.exe
Size 145KB
SHA256 3a81661b4f7e5d2e44847a52b46b49fb92fa2e12a4e3ab63df4b248966397567
MD5 4797668cd0a042063e3d2f34aaf3333c
SHA1 fdf90f965acbee58ee8e31fa62ddb657cfc12eb0
SHA512 1deb315b1bed701b191a0454d44fde877b1712215864c2274c0df29f6ed6c5e91f59a563fe7864252d5f201ea27ba6532b2b217a117a36a211261321fb241f4c
SSDEEP 3072:3R1+aJe1mgawzxsBub861jIHxowR1sxn8xfyRGF27T+Ihi0Mbk6/pb8DEc3OjQD8:3RUTV5ny1sl44FMbkm5c3rZFPM0pjmbp
MD5 SHA1 SHA512 SSDEEP

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memory/1224-21-0x0000000077752000-0x0000000077753000-memory.dmp

Download

memory/1224-22-0x0000000000400000-0x0000000000482000-memory.dmp

Download

memory/1464-0-0x0000000000400000-0x0000000000482000-memory.dmp

Download

memory/1464-6-0x0000000000400000-0x0000000000482000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads