cryptolocker | 43c5f2e7aacbc9a3439a810e3768087b7c8bea191ef84d71b2aa8686befed073

General

Target

Vcffipzmnipbxzdl.exe
Size

827KB
MD5

7f9c454a2e016e533e181d53eba113bc
SHA1

694dc7713537a7237030f7623881423fcb8d8c5c
SHA256

c7dc529d8aae76b4e797e4e9e3ea7cd69669e6c3bb3f94d80f1974d1b9f69378
SHA512

6869cf5a7c3526acf402b1ef09a9477dedf6cf534ff728e0823b9413ba41e888bd5b61cc20421d4a799df493126598a4a906ac2ab46147d9e4bcfa5d3600a110

Score

10^/10

cryptolocker persistence ransomware suricata

Malware Config

Signatures

CryptoLocker
Ransomware family with multiple variants.
ransomware cryptolocker
suricata: ET MALWARE Possible Zeus GameOver/FluBot Related DGA NXDOMAIN Responses
suricata: ET MALWARE Possible Zeus GameOver/FluBot Related DGA NXDOMAIN Responses
suricata

Executes dropped EXE 2 IoCs

pid	Process
1612	Avywuixyxmexxtr.exe
1732	Avywuixyxmexxtr.exe

Deletes itself 1 IoCs

pid	Process
1612	Avywuixyxmexxtr.exe

Loads dropped DLL 2 IoCs

pid	Process
836	Vcffipzmnipbxzdl.exe
836	Vcffipzmnipbxzdl.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows\CurrentVersion\Run	Avywuixyxmexxtr.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows\CurrentVersion\Run\CryptoLocker = "C:\\Users\\Admin\\AppData\\Local\\Avywuixyxmexxtr.exe"	Avywuixyxmexxtr.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce	Avywuixyxmexxtr.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\*CryptoLocker = "C:\\Users\\Admin\\AppData\\Local\\Avywuixyxmexxtr.exe"	Avywuixyxmexxtr.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 836 wrote to memory of 1612	836	Vcffipzmnipbxzdl.exe	28
PID 836 wrote to memory of 1612	836	Vcffipzmnipbxzdl.exe	28
PID 836 wrote to memory of 1612	836	Vcffipzmnipbxzdl.exe	28
PID 836 wrote to memory of 1612	836	Vcffipzmnipbxzdl.exe	28
PID 1612 wrote to memory of 1732	1612	Avywuixyxmexxtr.exe	29
PID 1612 wrote to memory of 1732	1612	Avywuixyxmexxtr.exe	29
PID 1612 wrote to memory of 1732	1612	Avywuixyxmexxtr.exe	29
PID 1612 wrote to memory of 1732	1612	Avywuixyxmexxtr.exe	29

C:\Users\Admin\AppData\Local\Temp\Vcffipzmnipbxzdl.exe
"C:\Users\Admin\AppData\Local\Temp\Vcffipzmnipbxzdl.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:836
- C:\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe
  "C:\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe" "-rC:\Users\Admin\AppData\Local\Temp\Vcffipzmnipbxzdl.exe"
  2⤵
  - Executes dropped EXE
  - Deletes itself
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:1612
- - C:\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe
    "C:\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe" -w130
    3⤵
    - Executes dropped EXE
    PID:1732

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
827KB

MD5
7f9c454a2e016e533e181d53eba113bc

SHA1
694dc7713537a7237030f7623881423fcb8d8c5c

SHA256
c7dc529d8aae76b4e797e4e9e3ea7cd69669e6c3bb3f94d80f1974d1b9f69378

SHA512
6869cf5a7c3526acf402b1ef09a9477dedf6cf534ff728e0823b9413ba41e888bd5b61cc20421d4a799df493126598a4a906ac2ab46147d9e4bcfa5d3600a110

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

Filesize
827KB

MD5
7f9c454a2e016e533e181d53eba113bc

SHA1
694dc7713537a7237030f7623881423fcb8d8c5c

SHA256
c7dc529d8aae76b4e797e4e9e3ea7cd69669e6c3bb3f94d80f1974d1b9f69378

SHA512
6869cf5a7c3526acf402b1ef09a9477dedf6cf534ff728e0823b9413ba41e888bd5b61cc20421d4a799df493126598a4a906ac2ab46147d9e4bcfa5d3600a110

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

Filesize
827KB

MD5
7f9c454a2e016e533e181d53eba113bc

SHA1
694dc7713537a7237030f7623881423fcb8d8c5c

SHA256
c7dc529d8aae76b4e797e4e9e3ea7cd69669e6c3bb3f94d80f1974d1b9f69378

SHA512
6869cf5a7c3526acf402b1ef09a9477dedf6cf534ff728e0823b9413ba41e888bd5b61cc20421d4a799df493126598a4a906ac2ab46147d9e4bcfa5d3600a110

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

Filesize
827KB

MD5
7f9c454a2e016e533e181d53eba113bc

SHA1
694dc7713537a7237030f7623881423fcb8d8c5c

SHA256
c7dc529d8aae76b4e797e4e9e3ea7cd69669e6c3bb3f94d80f1974d1b9f69378

SHA512
6869cf5a7c3526acf402b1ef09a9477dedf6cf534ff728e0823b9413ba41e888bd5b61cc20421d4a799df493126598a4a906ac2ab46147d9e4bcfa5d3600a110

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

Filesize
827KB

MD5
7f9c454a2e016e533e181d53eba113bc

SHA1
694dc7713537a7237030f7623881423fcb8d8c5c

SHA256
c7dc529d8aae76b4e797e4e9e3ea7cd69669e6c3bb3f94d80f1974d1b9f69378

SHA512
6869cf5a7c3526acf402b1ef09a9477dedf6cf534ff728e0823b9413ba41e888bd5b61cc20421d4a799df493126598a4a906ac2ab46147d9e4bcfa5d3600a110

Download Submit
memory/836-54-0x0000000075721000-0x0000000075723000-memory.dmp

Filesize
8KB

Download
memory/836-55-0x0000000000400000-0x0000000000520000-memory.dmp

Filesize
1.1MB

Download
memory/1612-63-0x0000000000400000-0x0000000000520000-memory.dmp

Filesize
1.1MB

Download
memory/1732-70-0x0000000000400000-0x0000000000520000-memory.dmp

Filesize
1.1MB

Download

Analysis

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