5ce5268d1e3cc90d6f397fccf6c7379352dd7e81eb9601b3128fe18de535b4de

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
06-04-2024 09:48

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General

Target

2024-04-06_a4949f2741364fdd6f1bd4347f1df4bc_cryptolocker.exe
Size

43KB
MD5

a4949f2741364fdd6f1bd4347f1df4bc
SHA1

96d43c4e4ee6963ca7dd0c284f0e9c1cee3a2cae
SHA256

5ce5268d1e3cc90d6f397fccf6c7379352dd7e81eb9601b3128fe18de535b4de
SHA512

377d50c2f7bf3b3f815f0a80c7d6969224b97bdfad3e22bcf6fb4a31d5e126d14ad7c86143e34fe68384258644e189e548364d2234c7ffd1eae563672567e021
SSDEEP

768:b7o/2n1TCraU6GD1a4X0WcO+wMVm+slAMvcWp8EB0/z:bc/y2lkF0+B2j8C0/z

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x0008000000023201-12.dat	CryptoLocker_rule2

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-1-5-21-983155329-280873152-1838004294-1000\Control Panel\International\Geo\Nation	2024-04-06_a4949f2741364fdd6f1bd4347f1df4bc_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3636	rewok.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 1208 wrote to memory of 3636	1208	2024-04-06_a4949f2741364fdd6f1bd4347f1df4bc_cryptolocker.exe	88
PID 1208 wrote to memory of 3636	1208	2024-04-06_a4949f2741364fdd6f1bd4347f1df4bc_cryptolocker.exe	88
PID 1208 wrote to memory of 3636	1208	2024-04-06_a4949f2741364fdd6f1bd4347f1df4bc_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-04-06_a4949f2741364fdd6f1bd4347f1df4bc_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-06_a4949f2741364fdd6f1bd4347f1df4bc_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1208
- C:\Users\Admin\AppData\Local\Temp\rewok.exe
  "C:\Users\Admin\AppData\Local\Temp\rewok.exe"
  2⤵
  - Executes dropped EXE
  PID:3636

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

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Downloads

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

Filesize
43KB

MD5
cda7e3b0d41b6e14fc0ef30145390f62

SHA1
818fc6d81e886b9fa6b2bc5af04a55cd59917110

SHA256
5d73dfa69bc59ee3b9874316a2d9c7be2c0c2ff59c7d40c541405a6c8269b04f

SHA512
27394c07485a2d8ff11756d598d88a7f4c3285f351a1e5a2f0aa07d302bce1e21c876af347353d4da39f85accf55cc3f76c0e5f6146389f76d3b02c071f6f698

Download Submit
memory/1208-0-0x0000000000700000-0x0000000000706000-memory.dmp

Filesize
24KB

Download
memory/1208-1-0x0000000000700000-0x0000000000706000-memory.dmp

Filesize
24KB

Download
memory/1208-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/3636-20-0x0000000002120000-0x0000000002126000-memory.dmp

Filesize
24KB

Download