4ec9e919597ae3de952e3a3c30ff52f076fd16333db63c419ba68eee1be74753

Analysis

max time kernel
149s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
13/03/2024, 01:51

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-03-13_b3c71fe4784494d0c52bf5a5d3ffb6f4_cryptolocker.exe
Size

104KB
MD5

b3c71fe4784494d0c52bf5a5d3ffb6f4
SHA1

51a9c427eb277856a896b7baf866e1df7e26814b
SHA256

4ec9e919597ae3de952e3a3c30ff52f076fd16333db63c419ba68eee1be74753
SHA512

289acaf15e42ba3bb93245c3f325ec3ac5fa8cf1f335e1992794a6d374d3d15931142bef12d49a184e89cb692bc535ec48fd58c34c1e3bcb020489a608d0d792
SSDEEP

1536:V6QFElP6n+gMQMOtEvwDpjQGYQbN/PKwNgpQbCJhA:V6a+pOtEvwDpjtzx

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000e000000023154-12.dat	CryptoLocker_rule2

Detection of Cryptolocker Samples 1 IoCs

resource	yara_rule
behavioral2/files/0x000e000000023154-12.dat	CryptoLocker_set1

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-275798769-4264537674-1142822080-1000\Control Panel\International\Geo\Nation	2024-03-13_b3c71fe4784494d0c52bf5a5d3ffb6f4_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2876	asih.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3480 wrote to memory of 2876	3480	2024-03-13_b3c71fe4784494d0c52bf5a5d3ffb6f4_cryptolocker.exe	87
PID 3480 wrote to memory of 2876	3480	2024-03-13_b3c71fe4784494d0c52bf5a5d3ffb6f4_cryptolocker.exe	87
PID 3480 wrote to memory of 2876	3480	2024-03-13_b3c71fe4784494d0c52bf5a5d3ffb6f4_cryptolocker.exe	87

C:\Users\Admin\AppData\Local\Temp\2024-03-13_b3c71fe4784494d0c52bf5a5d3ffb6f4_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-13_b3c71fe4784494d0c52bf5a5d3ffb6f4_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3480
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2876

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
105KB

MD5
6abe99c4d9f6c44e3071bf27eef69fb4

SHA1
93ab0d1e3687f293ac0a29e036c28aa862f85651

SHA256
8b1042729a0eb0b27f48e5b2c35da6afaad82d9f8cf29c2f751241f26d3f61f7

SHA512
92438024d82cfa10dba375835cd92f35028695341b243e9f8f6bd3808153e73320fc506b462c68ced2ad9400ae207f2250d2ab8891e97f77b52edd7d9eb86431

Download Submit
memory/2876-18-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/2876-17-0x0000000002080000-0x0000000002086000-memory.dmp

Filesize
24KB

Download
memory/3480-0-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/3480-1-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/3480-2-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download