cryptolocker | 59cb0eca818103244e9d3812600269cf57f6d341d3bdbbbe4d2f3dd26a476646

General

Target

59cb0eca818103244e9d3812600269cf57f6d341d3bdbbbe4d2f3dd26a476646.exe
Size

821KB
MD5

685634dac8b4c2b9429e80f8cd572563
SHA1

2c55e2ae8fc5b9426144b1045739552198ea8461
SHA256

59cb0eca818103244e9d3812600269cf57f6d341d3bdbbbe4d2f3dd26a476646
SHA512

b5f965e91e7949fab6fa519bbba1c3dbdad2e4e2410ac23ee8412f61c0bce3f160febb1c34b9db71d25782dd0784d3b3b1bfea5186b61f0b89394f196e7648b4

Score

10^/10

cryptolocker persistence ransomware

Malware Config

Signatures

CryptoLocker
Ransomware family with multiple variants.
ransomware cryptolocker

Executes dropped EXE 2 IoCs

pid	Process
1924	Avywuixyxmexxtr.exe
1256	Avywuixyxmexxtr.exe

Deletes itself 1 IoCs

pid	Process
1924	Avywuixyxmexxtr.exe

Loads dropped DLL 2 IoCs

pid	Process
1584	59cb0eca818103244e9d3812600269cf57f6d341d3bdbbbe4d2f3dd26a476646.exe
1584	59cb0eca818103244e9d3812600269cf57f6d341d3bdbbbe4d2f3dd26a476646.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-1-5-21-3762437355-3468409815-1164039494-1000\Software\Microsoft\Windows\CurrentVersion\Run	Avywuixyxmexxtr.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3762437355-3468409815-1164039494-1000\Software\Microsoft\Windows\CurrentVersion\Run\CryptoLocker = "C:\\Users\\Admin\\AppData\\Local\\Avywuixyxmexxtr.exe"	Avywuixyxmexxtr.exe
Key created	\REGISTRY\USER\S-1-5-21-3762437355-3468409815-1164039494-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce	Avywuixyxmexxtr.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3762437355-3468409815-1164039494-1000\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 1584 wrote to memory of 1924	1584	59cb0eca818103244e9d3812600269cf57f6d341d3bdbbbe4d2f3dd26a476646.exe	28
PID 1584 wrote to memory of 1924	1584	59cb0eca818103244e9d3812600269cf57f6d341d3bdbbbe4d2f3dd26a476646.exe	28
PID 1584 wrote to memory of 1924	1584	59cb0eca818103244e9d3812600269cf57f6d341d3bdbbbe4d2f3dd26a476646.exe	28
PID 1584 wrote to memory of 1924	1584	59cb0eca818103244e9d3812600269cf57f6d341d3bdbbbe4d2f3dd26a476646.exe	28
PID 1924 wrote to memory of 1256	1924	Avywuixyxmexxtr.exe	29
PID 1924 wrote to memory of 1256	1924	Avywuixyxmexxtr.exe	29
PID 1924 wrote to memory of 1256	1924	Avywuixyxmexxtr.exe	29
PID 1924 wrote to memory of 1256	1924	Avywuixyxmexxtr.exe	29

C:\Users\Admin\AppData\Local\Temp\59cb0eca818103244e9d3812600269cf57f6d341d3bdbbbe4d2f3dd26a476646.exe
"C:\Users\Admin\AppData\Local\Temp\59cb0eca818103244e9d3812600269cf57f6d341d3bdbbbe4d2f3dd26a476646.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1584
- C:\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe
  "C:\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe" "-rC:\Users\Admin\AppData\Local\Temp\59cb0eca818103244e9d3812600269cf57f6d341d3bdbbbe4d2f3dd26a476646.exe"
  2⤵
  - Executes dropped EXE
  - Deletes itself
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:1924
- - C:\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe
    "C:\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe" -w128
    3⤵
    - Executes dropped EXE
    PID:1256

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
821KB

MD5
685634dac8b4c2b9429e80f8cd572563

SHA1
2c55e2ae8fc5b9426144b1045739552198ea8461

SHA256
59cb0eca818103244e9d3812600269cf57f6d341d3bdbbbe4d2f3dd26a476646

SHA512
b5f965e91e7949fab6fa519bbba1c3dbdad2e4e2410ac23ee8412f61c0bce3f160febb1c34b9db71d25782dd0784d3b3b1bfea5186b61f0b89394f196e7648b4

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

Filesize
821KB

MD5
685634dac8b4c2b9429e80f8cd572563

SHA1
2c55e2ae8fc5b9426144b1045739552198ea8461

SHA256
59cb0eca818103244e9d3812600269cf57f6d341d3bdbbbe4d2f3dd26a476646

SHA512
b5f965e91e7949fab6fa519bbba1c3dbdad2e4e2410ac23ee8412f61c0bce3f160febb1c34b9db71d25782dd0784d3b3b1bfea5186b61f0b89394f196e7648b4

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

Filesize
821KB

MD5
685634dac8b4c2b9429e80f8cd572563

SHA1
2c55e2ae8fc5b9426144b1045739552198ea8461

SHA256
59cb0eca818103244e9d3812600269cf57f6d341d3bdbbbe4d2f3dd26a476646

SHA512
b5f965e91e7949fab6fa519bbba1c3dbdad2e4e2410ac23ee8412f61c0bce3f160febb1c34b9db71d25782dd0784d3b3b1bfea5186b61f0b89394f196e7648b4

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

Filesize
821KB

MD5
685634dac8b4c2b9429e80f8cd572563

SHA1
2c55e2ae8fc5b9426144b1045739552198ea8461

SHA256
59cb0eca818103244e9d3812600269cf57f6d341d3bdbbbe4d2f3dd26a476646

SHA512
b5f965e91e7949fab6fa519bbba1c3dbdad2e4e2410ac23ee8412f61c0bce3f160febb1c34b9db71d25782dd0784d3b3b1bfea5186b61f0b89394f196e7648b4

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

Filesize
821KB

MD5
685634dac8b4c2b9429e80f8cd572563

SHA1
2c55e2ae8fc5b9426144b1045739552198ea8461

SHA256
59cb0eca818103244e9d3812600269cf57f6d341d3bdbbbe4d2f3dd26a476646

SHA512
b5f965e91e7949fab6fa519bbba1c3dbdad2e4e2410ac23ee8412f61c0bce3f160febb1c34b9db71d25782dd0784d3b3b1bfea5186b61f0b89394f196e7648b4

Download Submit
memory/1256-71-0x0000000000400000-0x0000000000945000-memory.dmp

Filesize
5.3MB

Download
memory/1256-77-0x0000000000400000-0x0000000000945000-memory.dmp

Filesize
5.3MB

Download
memory/1256-73-0x0000000000400000-0x0000000000945000-memory.dmp

Filesize
5.3MB

Download
memory/1584-55-0x0000000000400000-0x0000000000945000-memory.dmp

Filesize
5.3MB

Download
memory/1584-54-0x00000000756B1000-0x00000000756B3000-memory.dmp

Filesize
8KB

Download
memory/1584-62-0x0000000000400000-0x0000000000945000-memory.dmp

Filesize
5.3MB

Download
memory/1924-67-0x0000000000400000-0x0000000000945000-memory.dmp

Filesize
5.3MB

Download
memory/1924-76-0x0000000000400000-0x0000000000945000-memory.dmp

Filesize
5.3MB

Download
memory/1924-64-0x0000000000400000-0x0000000000945000-memory.dmp

Filesize
5.3MB

Download

Analysis

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