cryptolocker | a8ff366f374462d0dfda4205b58c93f2c98b0fecf7e81de4b12725cd3e938247

General

Target

a8ff366f374462d0dfda4205b58c93f2c98b0fecf7e81de4b12725cd3e938247.exe
Size

380KB
MD5

a2481f0e6e6ba5262846a3c9919fc3f0
SHA1

ea7f82eb961fe7846d9d50ac256c005722cbdd93
SHA256

a8ff366f374462d0dfda4205b58c93f2c98b0fecf7e81de4b12725cd3e938247
SHA512

c130d91021a55836a07cce65bb545f86f3a309ff8545646bdf49430eae6d2729f217878fd9bf6e08d40223cf5de97474a054eb3dd274e24fa244721df5ad3603
SSDEEP

6144:dhdo9xPW/afhV3ceWu5e2Rio6AMqXv+/WgTO3x5N22vWvLRKKAX5l++SyVI:Twsafhege+6AMq/+bT85I2vCMX5l+Zn

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

1860 Avywuixyxmexxtr.exe
1060 Avywuixyxmexxtr.exe
Deletes itself 1 IoCs

Processes:

Avywuixyxmexxtr.exe

pid process

1860 Avywuixyxmexxtr.exe
Loads dropped DLL 1 IoCs

Processes:

a8ff366f374462d0dfda4205b58c93f2c98b0fecf7e81de4b12725cd3e938247.exe

pid process

1928 a8ff366f374462d0dfda4205b58c93f2c98b0fecf7e81de4b12725cd3e938247.exe

pid	process
1860	Avywuixyxmexxtr.exe
1060	Avywuixyxmexxtr.exe

pid	process
1860	Avywuixyxmexxtr.exe

pid	process
1928	a8ff366f374462d0dfda4205b58c93f2c98b0fecf7e81de4b12725cd3e938247.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
Set value (str)	\REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000\Software\Microsoft\Windows\CurrentVersion\Run\CryptoLocker = "C:\\Users\\Admin\\AppData\\Local\\Avywuixyxmexxtr.exe"	Avywuixyxmexxtr.exe
Key created	\REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce	Avywuixyxmexxtr.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\*CryptoLocker = "C:\\Users\\Admin\\AppData\\Local\\Avywuixyxmexxtr.exe"	Avywuixyxmexxtr.exe
Key created	\REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000\Software\Microsoft\Windows\CurrentVersion\Run	Avywuixyxmexxtr.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

a8ff366f374462d0dfda4205b58c93f2c98b0fecf7e81de4b12725cd3e938247.exeAvywuixyxmexxtr.exe

description	pid	process	target process
PID 1928 wrote to memory of 1860	1928	a8ff366f374462d0dfda4205b58c93f2c98b0fecf7e81de4b12725cd3e938247.exe	Avywuixyxmexxtr.exe
PID 1928 wrote to memory of 1860	1928	a8ff366f374462d0dfda4205b58c93f2c98b0fecf7e81de4b12725cd3e938247.exe	Avywuixyxmexxtr.exe
PID 1928 wrote to memory of 1860	1928	a8ff366f374462d0dfda4205b58c93f2c98b0fecf7e81de4b12725cd3e938247.exe	Avywuixyxmexxtr.exe
PID 1928 wrote to memory of 1860	1928	a8ff366f374462d0dfda4205b58c93f2c98b0fecf7e81de4b12725cd3e938247.exe	Avywuixyxmexxtr.exe
PID 1860 wrote to memory of 1060	1860	Avywuixyxmexxtr.exe	Avywuixyxmexxtr.exe
PID 1860 wrote to memory of 1060	1860	Avywuixyxmexxtr.exe	Avywuixyxmexxtr.exe
PID 1860 wrote to memory of 1060	1860	Avywuixyxmexxtr.exe	Avywuixyxmexxtr.exe
PID 1860 wrote to memory of 1060	1860	Avywuixyxmexxtr.exe	Avywuixyxmexxtr.exe

C:\Users\Admin\AppData\Local\Temp\a8ff366f374462d0dfda4205b58c93f2c98b0fecf7e81de4b12725cd3e938247.exe
"C:\Users\Admin\AppData\Local\Temp\a8ff366f374462d0dfda4205b58c93f2c98b0fecf7e81de4b12725cd3e938247.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1928
- C:\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe
  "C:\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe" "-rC:\Users\Admin\AppData\Local\Temp\a8ff366f374462d0dfda4205b58c93f2c98b0fecf7e81de4b12725cd3e938247.exe"
  2⤵
  - Executes dropped EXE
  - Deletes itself
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:1860
- - C:\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe
    "C:\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe" -w120
    3⤵
    - Executes dropped EXE
    PID:1060

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

Loading Replay Monitor...

Downloads

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

Filesize
380KB

MD5
a2481f0e6e6ba5262846a3c9919fc3f0

SHA1
ea7f82eb961fe7846d9d50ac256c005722cbdd93

SHA256
a8ff366f374462d0dfda4205b58c93f2c98b0fecf7e81de4b12725cd3e938247

SHA512
c130d91021a55836a07cce65bb545f86f3a309ff8545646bdf49430eae6d2729f217878fd9bf6e08d40223cf5de97474a054eb3dd274e24fa244721df5ad3603

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

Filesize
380KB

MD5
a2481f0e6e6ba5262846a3c9919fc3f0

SHA1
ea7f82eb961fe7846d9d50ac256c005722cbdd93

SHA256
a8ff366f374462d0dfda4205b58c93f2c98b0fecf7e81de4b12725cd3e938247

SHA512
c130d91021a55836a07cce65bb545f86f3a309ff8545646bdf49430eae6d2729f217878fd9bf6e08d40223cf5de97474a054eb3dd274e24fa244721df5ad3603

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

Filesize
380KB

MD5
a2481f0e6e6ba5262846a3c9919fc3f0

SHA1
ea7f82eb961fe7846d9d50ac256c005722cbdd93

SHA256
a8ff366f374462d0dfda4205b58c93f2c98b0fecf7e81de4b12725cd3e938247

SHA512
c130d91021a55836a07cce65bb545f86f3a309ff8545646bdf49430eae6d2729f217878fd9bf6e08d40223cf5de97474a054eb3dd274e24fa244721df5ad3603

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

Filesize
380KB

MD5
a2481f0e6e6ba5262846a3c9919fc3f0

SHA1
ea7f82eb961fe7846d9d50ac256c005722cbdd93

SHA256
a8ff366f374462d0dfda4205b58c93f2c98b0fecf7e81de4b12725cd3e938247

SHA512
c130d91021a55836a07cce65bb545f86f3a309ff8545646bdf49430eae6d2729f217878fd9bf6e08d40223cf5de97474a054eb3dd274e24fa244721df5ad3603

Download Submit
memory/1060-60-0x0000000000000000-mapping.dmp

Download
memory/1860-56-0x0000000000000000-mapping.dmp

Download
memory/1928-54-0x00000000762B1000-0x00000000762B3000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing