dfa0d8e3f525c8c5ef6caf3da3a0c7496aa4c0b1fbe163aa2d11a321230491a0

General

Target

a47b787a42c886785fb2e232af09fa09_JaffaCakes118.exe
Size

16KB
MD5

a47b787a42c886785fb2e232af09fa09
SHA1

1902a8660ceb274ee4ff87dd07e14b2ce474f79a
SHA256

dfa0d8e3f525c8c5ef6caf3da3a0c7496aa4c0b1fbe163aa2d11a321230491a0
SHA512

20d455690a6fd91a1afc331a3a569cbb8318b6f8e4edd51b6863e9b8d2d4a24ff1e6859319e213d7f0be65ad1f11048520c5d5eb322ec487da1bc10e40418a8b
SSDEEP

384:z93OPkSyyNmFfR0K9erK7Xo1WQEFlAtSeaJAO9FGy:z93ukJyNmFfFeoY1WQEF2Da+MF

Score

8^/10

discovery persistence privilege_escalation upx

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

Deletes itself 1 IoCs

pid	Process
2808	cmd.exe

Executes dropped EXE 1 IoCs

pid	Process
2152	lenyunsk.exe

Loads dropped DLL 2 IoCs

pid	Process
2412	a47b787a42c886785fb2e232af09fa09_JaffaCakes118.exe
2412	a47b787a42c886785fb2e232af09fa09_JaffaCakes118.exe

UPX packed file 4 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/memory/2412-0-0x0000000000400000-0x0000000000410000-memory.dmp	upx
behavioral1/files/0x0008000000018d89-3.dat	upx
behavioral1/memory/2412-11-0x0000000000400000-0x0000000000410000-memory.dmp	upx
behavioral1/memory/2152-14-0x0000000000400000-0x0000000000410000-memory.dmp	upx

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\lenyuns.dll	a47b787a42c886785fb2e232af09fa09_JaffaCakes118.exe
File created	C:\Windows\SysWOW64\lenyunsk.exe	a47b787a42c886785fb2e232af09fa09_JaffaCakes118.exe
File opened for modification	C:\Windows\SysWOW64\lenyunsk.exe	a47b787a42c886785fb2e232af09fa09_JaffaCakes118.exe

System Location Discovery: System Language Discovery 1 TTPs 2 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	a47b787a42c886785fb2e232af09fa09_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2412 wrote to memory of 2152	2412	a47b787a42c886785fb2e232af09fa09_JaffaCakes118.exe	30
PID 2412 wrote to memory of 2152	2412	a47b787a42c886785fb2e232af09fa09_JaffaCakes118.exe	30
PID 2412 wrote to memory of 2152	2412	a47b787a42c886785fb2e232af09fa09_JaffaCakes118.exe	30
PID 2412 wrote to memory of 2152	2412	a47b787a42c886785fb2e232af09fa09_JaffaCakes118.exe	30
PID 2412 wrote to memory of 2808	2412	a47b787a42c886785fb2e232af09fa09_JaffaCakes118.exe	32
PID 2412 wrote to memory of 2808	2412	a47b787a42c886785fb2e232af09fa09_JaffaCakes118.exe	32
PID 2412 wrote to memory of 2808	2412	a47b787a42c886785fb2e232af09fa09_JaffaCakes118.exe	32
PID 2412 wrote to memory of 2808	2412	a47b787a42c886785fb2e232af09fa09_JaffaCakes118.exe	32

C:\Users\Admin\AppData\Local\Temp\a47b787a42c886785fb2e232af09fa09_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\a47b787a42c886785fb2e232af09fa09_JaffaCakes118.exe"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2412
- C:\Windows\SysWOW64\lenyunsk.exe
  C:\Windows\system32\lenyunsk.exe ˜‰
  2⤵
  - Executes dropped EXE
  PID:2152
- C:\Windows\SysWOW64\cmd.exe
  cmd /c C:\Users\Admin\AppData\Local\Temp\a47b787a42c886785fb2e232af09fa09_JaffaCakes118.exe.bat
  2⤵
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2808

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Event Triggered Execution

1

T1546

AppInit DLLs

1

T1546.010

Privilege Escalation

Event Triggered Execution

1

T1546

AppInit DLLs

1

T1546.010

Defense Evasion

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\a47b787a42c886785fb2e232af09fa09_JaffaCakes118.exe.bat

Filesize
210B

MD5
660dfe5890db408df8fc01445c01ec71

SHA1
439a8b8fd7662a48597dacb8f4a4adc085f375ee

SHA256
e7ff0ae5d24011f4957237a42df6a638fd1770de8031d27d39d489c2091f8d0e

SHA512
225cf266c733fc10667bfa0aebfc56bdb4673c0bcdfc3fc9d89483ab334575c4b8cc6f0ff9014c5032c5a48acfa1bc115585d776eedb9001c478aaf2b9372940

Download Submit
\Windows\SysWOW64\lenyunsk.exe

Filesize
16KB

MD5
a47b787a42c886785fb2e232af09fa09

SHA1
1902a8660ceb274ee4ff87dd07e14b2ce474f79a

SHA256
dfa0d8e3f525c8c5ef6caf3da3a0c7496aa4c0b1fbe163aa2d11a321230491a0

SHA512
20d455690a6fd91a1afc331a3a569cbb8318b6f8e4edd51b6863e9b8d2d4a24ff1e6859319e213d7f0be65ad1f11048520c5d5eb322ec487da1bc10e40418a8b

Download Submit
memory/2152-14-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/2412-0-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/2412-9-0x0000000000230000-0x0000000000240000-memory.dmp

Filesize
64KB

Download
memory/2412-11-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/2412-12-0x0000000000230000-0x0000000000240000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing