d139ba078f15c69c93814667c6c105ff1c6c76620b30626f10cd4f2ffca04ff1

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
27-01-2024 17:36

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General

Target

2024-01-27_c81bc7c5cc88ac434bb39b91729dc503_cryptolocker.exe
Size

41KB
MD5

c81bc7c5cc88ac434bb39b91729dc503
SHA1

134d1544688a0a2a22ce37d6727989800cd7ef3e
SHA256

d139ba078f15c69c93814667c6c105ff1c6c76620b30626f10cd4f2ffca04ff1
SHA512

b0084ba07298eb4eefa4aab36ca96fca5ed55fc14040441e066971aedbdf9b3fdff9a5ba25d9535ff6fcd9e15229ae846bd31730b15ba8eebf465b6519e9c3a7
SSDEEP

768:b7o/2n1TCraU6GD1a4X0WcO+wMVm+slAMRqRQ:bc/y2lkF0+BjS

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x00080000000231f9-12.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-1-5-21-3803511929-1339359695-2191195476-1000\Control Panel\International\Geo\Nation	2024-01-27_c81bc7c5cc88ac434bb39b91729dc503_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1772	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 2960 wrote to memory of 1772	2960	2024-01-27_c81bc7c5cc88ac434bb39b91729dc503_cryptolocker.exe	84
PID 2960 wrote to memory of 1772	2960	2024-01-27_c81bc7c5cc88ac434bb39b91729dc503_cryptolocker.exe	84
PID 2960 wrote to memory of 1772	2960	2024-01-27_c81bc7c5cc88ac434bb39b91729dc503_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-01-27_c81bc7c5cc88ac434bb39b91729dc503_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-27_c81bc7c5cc88ac434bb39b91729dc503_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2960
- C:\Users\Admin\AppData\Local\Temp\rewok.exe
  "C:\Users\Admin\AppData\Local\Temp\rewok.exe"
  2⤵
  - Executes dropped EXE
  PID:1772

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
41KB

MD5
a65b7acaa4c36f6ff275ddbca4e94192

SHA1
8a8a96fd05d4a31a29e0ac100242a6ecb05c2d9a

SHA256
efbc023a9ba65c05072c44a900b1997b3b6d75676565c557bee5fc6a78195cbf

SHA512
559b906d180bc6cec71b502ad9d212db35182d841ee26c2f13df404003eeb389b749760fbbff6e246521183d2e94fee79fce5a310e70c40e0e0009c8a9b1a11a

Download Submit
memory/1772-20-0x0000000001F90000-0x0000000001F96000-memory.dmp

Filesize
24KB

Download
memory/2960-0-0x0000000002200000-0x0000000002206000-memory.dmp

Filesize
24KB

Download
memory/2960-1-0x0000000002200000-0x0000000002206000-memory.dmp

Filesize
24KB

Download
memory/2960-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download