cryptolocker | 9ec4697891cc6c9add803044a29bdd9d05701509b9eddc370d4caf00c15ef734

General

Target

9ec4697891cc6c9add803044a29bdd9d05701509b9eddc370d4caf00c15ef734.exe
Size

355KB
MD5

de400607d06b41a6f8b0935c3607541d
SHA1

f9924a0eb4e715f2c5e370235d39f295b6f95aa8
SHA256

9ec4697891cc6c9add803044a29bdd9d05701509b9eddc370d4caf00c15ef734
SHA512

4c7949096a20017489635d5440ab46513ccf12fe9cb57a1a0b0fd609db9ccf624bf1623d254c2adba8c510f4fcda1dc6b521a6b66860f7904cc8baac45f8018e
SSDEEP

6144:MzsQe4NQnn7swHWLJwpFHBqZ4IBbe5RJ7GgcbjYkuyfRVnL:MzReciWLMFh4DYRJ7EYklpp

Score

10^/10

cryptolocker persistence ransomware

Malware Config

Signatures

CryptoLocker
Ransomware family with multiple variants.
ransomware cryptolocker
Executes dropped EXE 2 IoCs

Processes:

Avywuixyxmexxtr.exeAvywuixyxmexxtr.exe

pid process

1876 Avywuixyxmexxtr.exe
1568 Avywuixyxmexxtr.exe
Deletes itself 1 IoCs

Processes:

Avywuixyxmexxtr.exe

pid process

1876 Avywuixyxmexxtr.exe
Loads dropped DLL 1 IoCs

Processes:

9ec4697891cc6c9add803044a29bdd9d05701509b9eddc370d4caf00c15ef734.exe

pid process

828 9ec4697891cc6c9add803044a29bdd9d05701509b9eddc370d4caf00c15ef734.exe

pid	process
1876	Avywuixyxmexxtr.exe
1568	Avywuixyxmexxtr.exe

pid	process
1876	Avywuixyxmexxtr.exe

pid	process
828	9ec4697891cc6c9add803044a29bdd9d05701509b9eddc370d4caf00c15ef734.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

Avywuixyxmexxtr.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run	Avywuixyxmexxtr.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\CryptoLocker = "C:\\Users\\Admin\\AppData\\Local\\Avywuixyxmexxtr.exe"	Avywuixyxmexxtr.exe
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce	Avywuixyxmexxtr.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\*CryptoLocker = "C:\\Users\\Admin\\AppData\\Local\\Avywuixyxmexxtr.exe"	Avywuixyxmexxtr.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

9ec4697891cc6c9add803044a29bdd9d05701509b9eddc370d4caf00c15ef734.exeAvywuixyxmexxtr.exe

description	pid	process	target process
PID 828 wrote to memory of 1876	828	9ec4697891cc6c9add803044a29bdd9d05701509b9eddc370d4caf00c15ef734.exe	Avywuixyxmexxtr.exe
PID 828 wrote to memory of 1876	828	9ec4697891cc6c9add803044a29bdd9d05701509b9eddc370d4caf00c15ef734.exe	Avywuixyxmexxtr.exe
PID 828 wrote to memory of 1876	828	9ec4697891cc6c9add803044a29bdd9d05701509b9eddc370d4caf00c15ef734.exe	Avywuixyxmexxtr.exe
PID 828 wrote to memory of 1876	828	9ec4697891cc6c9add803044a29bdd9d05701509b9eddc370d4caf00c15ef734.exe	Avywuixyxmexxtr.exe
PID 1876 wrote to memory of 1568	1876	Avywuixyxmexxtr.exe	Avywuixyxmexxtr.exe
PID 1876 wrote to memory of 1568	1876	Avywuixyxmexxtr.exe	Avywuixyxmexxtr.exe
PID 1876 wrote to memory of 1568	1876	Avywuixyxmexxtr.exe	Avywuixyxmexxtr.exe
PID 1876 wrote to memory of 1568	1876	Avywuixyxmexxtr.exe	Avywuixyxmexxtr.exe

C:\Users\Admin\AppData\Local\Temp\9ec4697891cc6c9add803044a29bdd9d05701509b9eddc370d4caf00c15ef734.exe
"C:\Users\Admin\AppData\Local\Temp\9ec4697891cc6c9add803044a29bdd9d05701509b9eddc370d4caf00c15ef734.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:828
- C:\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe
  "C:\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe" "-rC:\Users\Admin\AppData\Local\Temp\9ec4697891cc6c9add803044a29bdd9d05701509b9eddc370d4caf00c15ef734.exe"
  2⤵
  - Executes dropped EXE
  - Deletes itself
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:1876
- - C:\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe
    "C:\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe" -w11c
    3⤵
    - Executes dropped EXE
    PID:1568

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
355KB

MD5
de400607d06b41a6f8b0935c3607541d

SHA1
f9924a0eb4e715f2c5e370235d39f295b6f95aa8

SHA256
9ec4697891cc6c9add803044a29bdd9d05701509b9eddc370d4caf00c15ef734

SHA512
4c7949096a20017489635d5440ab46513ccf12fe9cb57a1a0b0fd609db9ccf624bf1623d254c2adba8c510f4fcda1dc6b521a6b66860f7904cc8baac45f8018e

Download Submit
C:\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe

Filesize
355KB

MD5
de400607d06b41a6f8b0935c3607541d

SHA1
f9924a0eb4e715f2c5e370235d39f295b6f95aa8

SHA256
9ec4697891cc6c9add803044a29bdd9d05701509b9eddc370d4caf00c15ef734

SHA512
4c7949096a20017489635d5440ab46513ccf12fe9cb57a1a0b0fd609db9ccf624bf1623d254c2adba8c510f4fcda1dc6b521a6b66860f7904cc8baac45f8018e

Download Submit
C:\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe

Filesize
355KB

MD5
de400607d06b41a6f8b0935c3607541d

SHA1
f9924a0eb4e715f2c5e370235d39f295b6f95aa8

SHA256
9ec4697891cc6c9add803044a29bdd9d05701509b9eddc370d4caf00c15ef734

SHA512
4c7949096a20017489635d5440ab46513ccf12fe9cb57a1a0b0fd609db9ccf624bf1623d254c2adba8c510f4fcda1dc6b521a6b66860f7904cc8baac45f8018e

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

Filesize
355KB

MD5
de400607d06b41a6f8b0935c3607541d

SHA1
f9924a0eb4e715f2c5e370235d39f295b6f95aa8

SHA256
9ec4697891cc6c9add803044a29bdd9d05701509b9eddc370d4caf00c15ef734

SHA512
4c7949096a20017489635d5440ab46513ccf12fe9cb57a1a0b0fd609db9ccf624bf1623d254c2adba8c510f4fcda1dc6b521a6b66860f7904cc8baac45f8018e

Download Submit
memory/828-60-0x0000000000400000-0x0000000000465000-memory.dmp

Filesize
404KB

Download
memory/828-54-0x0000000000400000-0x0000000000465000-memory.dmp

Filesize
404KB

Download
memory/828-61-0x0000000001EA0000-0x0000000001F05000-memory.dmp

Filesize
404KB

Download
memory/828-56-0x0000000075A11000-0x0000000075A13000-memory.dmp

Filesize
8KB

Download
memory/828-55-0x0000000001EA0000-0x0000000001F05000-memory.dmp

Filesize
404KB

Download
memory/1568-69-0x0000000000400000-0x0000000000465000-memory.dmp

Filesize
404KB

Download
memory/1568-72-0x0000000000400000-0x0000000000465000-memory.dmp

Filesize
404KB

Download
memory/1568-70-0x00000000002E0000-0x0000000000345000-memory.dmp

Filesize
404KB

Download
memory/1568-66-0x0000000000000000-mapping.dmp

Download
memory/1876-58-0x0000000000000000-mapping.dmp

Download
memory/1876-68-0x0000000000400000-0x0000000000465000-memory.dmp

Filesize
404KB

Download
memory/1876-63-0x00000000002D0000-0x0000000000335000-memory.dmp

Filesize
404KB

Download
memory/1876-62-0x0000000000400000-0x0000000000465000-memory.dmp

Filesize
404KB

Download
memory/1876-73-0x00000000002D0000-0x0000000000335000-memory.dmp

Filesize
404KB

Download

Analysis

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