cryptolocker | 9ec4697891cc6c9add803044a29bdd9d05701509b9eddc370d4caf00c15ef734

General

Target

de400607d06b41a6f8b0935c3607541d_JaffaCakes118.exe
Size

355KB
MD5

de400607d06b41a6f8b0935c3607541d
SHA1

f9924a0eb4e715f2c5e370235d39f295b6f95aa8
SHA256

9ec4697891cc6c9add803044a29bdd9d05701509b9eddc370d4caf00c15ef734
SHA512

4c7949096a20017489635d5440ab46513ccf12fe9cb57a1a0b0fd609db9ccf624bf1623d254c2adba8c510f4fcda1dc6b521a6b66860f7904cc8baac45f8018e
SSDEEP

6144:MzsQe4NQnn7swHWLJwpFHBqZ4IBbe5RJ7GgcbjYkuyfRVnL:MzReciWLMFh4DYRJ7EYklpp

Score

10^/10

cryptolocker discovery persistence ransomware

Malware Config

Signatures

CryptoLocker
Ransomware family with multiple variants.
ransomware cryptolocker
Cryptolocker family
cryptolocker

Deletes itself 1 IoCs

pid	Process
2764	Avywuixyxmexxtr.exe

Executes dropped EXE 2 IoCs

pid	Process
2764	Avywuixyxmexxtr.exe
2688	Avywuixyxmexxtr.exe

Loads dropped DLL 1 IoCs

pid	Process
2216	de400607d06b41a6f8b0935c3607541d_JaffaCakes118.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2703099537-420551529-3771253338-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\*CryptoLocker = "C:\\Users\\Admin\\AppData\\Local\\Avywuixyxmexxtr.exe"	Avywuixyxmexxtr.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2703099537-420551529-3771253338-1000\Software\Microsoft\Windows\CurrentVersion\Run\CryptoLocker = "C:\\Users\\Admin\\AppData\\Local\\Avywuixyxmexxtr.exe"	Avywuixyxmexxtr.exe

System Location Discovery: System Language Discovery 1 TTPs 3 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	de400607d06b41a6f8b0935c3607541d_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Avywuixyxmexxtr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Avywuixyxmexxtr.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2216 wrote to memory of 2764	2216	de400607d06b41a6f8b0935c3607541d_JaffaCakes118.exe	30
PID 2216 wrote to memory of 2764	2216	de400607d06b41a6f8b0935c3607541d_JaffaCakes118.exe	30
PID 2216 wrote to memory of 2764	2216	de400607d06b41a6f8b0935c3607541d_JaffaCakes118.exe	30
PID 2216 wrote to memory of 2764	2216	de400607d06b41a6f8b0935c3607541d_JaffaCakes118.exe	30
PID 2764 wrote to memory of 2688	2764	Avywuixyxmexxtr.exe	31
PID 2764 wrote to memory of 2688	2764	Avywuixyxmexxtr.exe	31
PID 2764 wrote to memory of 2688	2764	Avywuixyxmexxtr.exe	31
PID 2764 wrote to memory of 2688	2764	Avywuixyxmexxtr.exe	31

C:\Users\Admin\AppData\Local\Temp\de400607d06b41a6f8b0935c3607541d_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\de400607d06b41a6f8b0935c3607541d_JaffaCakes118.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2216
- C:\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe
  "C:\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe" "-rC:\Users\Admin\AppData\Local\Temp\de400607d06b41a6f8b0935c3607541d_JaffaCakes118.exe"
  2⤵
  - Deletes itself
  - Executes dropped EXE
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2764
- - C:\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe
    "C:\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe" -w11c
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:2688

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

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

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

\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe

Filesize
355KB

MD5
de400607d06b41a6f8b0935c3607541d

SHA1
f9924a0eb4e715f2c5e370235d39f295b6f95aa8

SHA256
9ec4697891cc6c9add803044a29bdd9d05701509b9eddc370d4caf00c15ef734

SHA512
4c7949096a20017489635d5440ab46513ccf12fe9cb57a1a0b0fd609db9ccf624bf1623d254c2adba8c510f4fcda1dc6b521a6b66860f7904cc8baac45f8018e

Download Submit
memory/2216-0-0x000000000045B000-0x0000000000460000-memory.dmp

Filesize
20KB

Download
memory/2216-1-0x0000000000400000-0x0000000000465000-memory.dmp

Filesize
404KB

Download
memory/2216-2-0x0000000000400000-0x0000000000465000-memory.dmp

Filesize
404KB

Download
memory/2216-11-0x0000000000400000-0x0000000000465000-memory.dmp

Filesize
404KB

Download
memory/2216-10-0x000000000045B000-0x0000000000460000-memory.dmp

Filesize
20KB

Download
memory/2688-17-0x0000000000400000-0x0000000000465000-memory.dmp

Filesize
404KB

Download
memory/2688-18-0x0000000000400000-0x0000000000465000-memory.dmp

Filesize
404KB

Download
memory/2688-20-0x0000000000400000-0x0000000000465000-memory.dmp

Filesize
404KB

Download
memory/2764-13-0x0000000000400000-0x0000000000465000-memory.dmp

Filesize
404KB

Download
memory/2764-14-0x0000000000400000-0x0000000000465000-memory.dmp

Filesize
404KB

Download
memory/2764-12-0x0000000000400000-0x0000000000465000-memory.dmp

Filesize
404KB

Download
memory/2764-19-0x0000000000400000-0x0000000000465000-memory.dmp

Filesize
404KB

Download
memory/2764-23-0x0000000000400000-0x0000000000465000-memory.dmp

Filesize
404KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads