841688d5f79b5ffeba436e04c80cbb7b1377900c79694b7a8ca0a46470377a57

Analysis

max time kernel
92s
max time network
129s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
29/02/2024, 03:46

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General

Target

2024-02-29_a528fb66cdd6d7ded55d42fc4e75f5ab_cryptolocker.exe
Size

39KB
MD5

a528fb66cdd6d7ded55d42fc4e75f5ab
SHA1

8b49a6e8ea2ba382f0b78adf3bb44c0340868518
SHA256

841688d5f79b5ffeba436e04c80cbb7b1377900c79694b7a8ca0a46470377a57
SHA512

53dc79754d8bbd3bd1037995eb8cda0c2a340abfc53ace8d20f10e8099530147d083ba4b448ebdd665fc81bf340559268553537f745d4cbeff07175ad6aad770
SSDEEP

384:btBYQg/WIEhUCSNyepEjYnDOAlzVol6U/zzo+tkq4XDIwNiJXxXunrkwIxZN:btB9g/WItCSsAGjX7e9N0hunrknN

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 2 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-1-5-21-2727153400-192325109-1870347593-1000\Control Panel\International\Geo\Nation	2024-02-29_a528fb66cdd6d7ded55d42fc4e75f5ab_cryptolocker.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2727153400-192325109-1870347593-1000\Control Panel\International\Geo\Nation	gewos.exe

Executes dropped EXE 1 IoCs

pid	Process
5044	gewos.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 2968 wrote to memory of 5044	2968	2024-02-29_a528fb66cdd6d7ded55d42fc4e75f5ab_cryptolocker.exe	89
PID 2968 wrote to memory of 5044	2968	2024-02-29_a528fb66cdd6d7ded55d42fc4e75f5ab_cryptolocker.exe	89
PID 2968 wrote to memory of 5044	2968	2024-02-29_a528fb66cdd6d7ded55d42fc4e75f5ab_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-02-29_a528fb66cdd6d7ded55d42fc4e75f5ab_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-29_a528fb66cdd6d7ded55d42fc4e75f5ab_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2968
- C:\Users\Admin\AppData\Local\Temp\gewos.exe
  "C:\Users\Admin\AppData\Local\Temp\gewos.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  PID:5044

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\gewos.exe

Filesize
39KB

MD5
28b8069f9ba718629a9785332c54e67b

SHA1
294a82ff050fe538354716461cc7229061862f99

SHA256
c3613415147486006b6ac4afee39dc6ee16b1a6aa8469ab10c674d1f6995ebb7

SHA512
8cb3667a07832b7370239ac99e681cff158910dce9e5c300ffaccaac6a3ce71e4de150c717d54facd25c61933c9a3d19d398b7c94a87bd6a180be1081e54fdd0

Download Submit
memory/2968-0-0x0000000000550000-0x0000000000556000-memory.dmp

Filesize
24KB

Download
memory/2968-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2968-1-0x0000000000550000-0x0000000000556000-memory.dmp

Filesize
24KB

Download
memory/5044-21-0x0000000002210000-0x0000000002216000-memory.dmp

Filesize
24KB

Download