838cbcc58fdb74beff2b2d0869c1939713ca6a8f99f29941630a515f7b59e0a4

Analysis

max time kernel
141s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
04/02/2024, 17:24

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General

Target

2024-02-04_39e47d29beac650071b566bb06491db1_cryptolocker.exe
Size

46KB
MD5

39e47d29beac650071b566bb06491db1
SHA1

ca75435b28b0bdd7b7738e3ec1e88e96f14c2c4c
SHA256

838cbcc58fdb74beff2b2d0869c1939713ca6a8f99f29941630a515f7b59e0a4
SHA512

4a75725584b589fcd6fde8ea19976905b3d4598062022317586dca0f4048fa3deafc91a25e625d215deab33760eb110f7c2a10f9d41dc71905570041db66de44
SSDEEP

768:wHGGaSawqnwjRQ6ESlmFOsPoOdQtOOtEvwDpjm6j4AYsqSh+DETkedmhXSJJG:YGzl5wjRQBBOsP1QMOtEvwDpjl39+D+M

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral2/memory/4380-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00070000000231fc-13.dat	CryptoLocker_rule2
behavioral2/memory/4380-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/4380-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00070000000231fc-13.dat	CryptoLocker_set1
behavioral2/memory/4380-17-0x0000000000500000-0x000000000050B000-memory.dmp	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-1-5-21-635608581-3370340891-292606865-1000\Control Panel\International\Geo\Nation	2024-02-04_39e47d29beac650071b566bb06491db1_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1360	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 4380 wrote to memory of 1360	4380	2024-02-04_39e47d29beac650071b566bb06491db1_cryptolocker.exe	84
PID 4380 wrote to memory of 1360	4380	2024-02-04_39e47d29beac650071b566bb06491db1_cryptolocker.exe	84
PID 4380 wrote to memory of 1360	4380	2024-02-04_39e47d29beac650071b566bb06491db1_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-02-04_39e47d29beac650071b566bb06491db1_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-04_39e47d29beac650071b566bb06491db1_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4380
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1360

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\asih.exe

Filesize
46KB

MD5
79e084c9992f8b666191fd16324d87ef

SHA1
8976c4d106b17e54fc0d9890fd73e558126ec17f

SHA256
d62423ee8982470d58694b39967cdc4be8f13526f1bca2f14f981b2289913566

SHA512
62c917b6417c9c634fde7db183d2f9c51e44fe81e80ba20b160cbf4266b42ccc3cbdae411c6c4447568c2a71947b74075f0ce4cdcc6dedd9e100fb496baa2854

Download Submit
memory/1360-19-0x00000000007E0000-0x00000000007E6000-memory.dmp

Filesize
24KB

Download
memory/1360-22-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/4380-0-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/4380-1-0x0000000000560000-0x0000000000566000-memory.dmp

Filesize
24KB

Download
memory/4380-2-0x0000000000560000-0x0000000000566000-memory.dmp

Filesize
24KB

Download
memory/4380-3-0x0000000000680000-0x0000000000686000-memory.dmp

Filesize
24KB

Download
memory/4380-17-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download