ab45b21802c92cd561e3dc246e26ca541eeb7adccb3804debb36a186713a87eb

Analysis

max time kernel
88s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
20/02/2024, 14:56

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General

Target

2024-02-20_b1771fd91b44cc136d63a8d9cd4346b2_cryptolocker.exe
Size

59KB
MD5

b1771fd91b44cc136d63a8d9cd4346b2
SHA1

f076b81d28be9bcabc7a0568841d9a3d254964c4
SHA256

ab45b21802c92cd561e3dc246e26ca541eeb7adccb3804debb36a186713a87eb
SHA512

fb8f228fdb064eb165a563c0e8f620f79f203b40621ec784388d59492bf489a6ed9ef790ff9209ea5fc5c516707b8ffca3d8c7259e4bd0a01bf38d46c8dfa00c
SSDEEP

1536:btB9g/xtCSKfxLIc//Xr+/AO/kIZ3ft2nVuTKB6nggOlHdUHTdj:btng54SMLr+/AO/kIhfoKMHdU

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x00070000000231fe-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-1-5-21-768304381-2824894965-3840216961-1000\Control Panel\International\Geo\Nation	2024-02-20_b1771fd91b44cc136d63a8d9cd4346b2_cryptolocker.exe
Key value queried	\REGISTRY\USER\S-1-5-21-768304381-2824894965-3840216961-1000\Control Panel\International\Geo\Nation	gewos.exe

Executes dropped EXE 1 IoCs

pid	Process
5112	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 2588 wrote to memory of 5112	2588	2024-02-20_b1771fd91b44cc136d63a8d9cd4346b2_cryptolocker.exe	85
PID 2588 wrote to memory of 5112	2588	2024-02-20_b1771fd91b44cc136d63a8d9cd4346b2_cryptolocker.exe	85
PID 2588 wrote to memory of 5112	2588	2024-02-20_b1771fd91b44cc136d63a8d9cd4346b2_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-02-20_b1771fd91b44cc136d63a8d9cd4346b2_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-20_b1771fd91b44cc136d63a8d9cd4346b2_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2588
- 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:5112

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

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Downloads

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

Filesize
59KB

MD5
9e3b1692bcac999180e82d32e5a0e518

SHA1
3deb634cddd36f8b5fe2e290b1b871af187ad84c

SHA256
de2a8cdb3dbc25724959adaf10df4cb525abea6fc3237dad3ba8f6d25e437591

SHA512
e6e611b9def7fc278f6abaaa46da24e17454ac025a79c6a1a854c7dff935e12ee69d135e81f8cbd5324469bab25c0912fffdfb9bc6097cbb345423b107d8844d

Download Submit
memory/2588-0-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/2588-1-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/2588-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/5112-20-0x0000000002090000-0x0000000002096000-memory.dmp

Filesize
24KB

Download