6043080749c24698cf20972fef7e48d43b51df1e822b548b730e2b0af6158b5c

Analysis

max time kernel
79s
max time network
145s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
28-01-2024 04:32

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General

Target

2024-01-28_4fd641b34a9cefac25c637d942fdabbb_cryptolocker.exe
Size

58KB
MD5

4fd641b34a9cefac25c637d942fdabbb
SHA1

e841ed0f4f3a799d056c9ebdf3c7bb73ee326675
SHA256

6043080749c24698cf20972fef7e48d43b51df1e822b548b730e2b0af6158b5c
SHA512

55f17f1f0300b23f59bd07021abf42c9bc18a4ef96c36a1907361fadfaf899bbc8452af32797b27e86cc898fb3fece66568b9d76b2ac7d2a476a65e04f357b54
SSDEEP

1536:btB9g/xtCSKfxLIc//Xr+/AO/kIZ3ft2nVuTKB6nggOlHdUHc:btng54SMLr+/AO/kIhfoKMHdt

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x0009000000022480-12.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-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	gewos.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	2024-01-28_4fd641b34a9cefac25c637d942fdabbb_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
880	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 1388 wrote to memory of 880	1388	2024-01-28_4fd641b34a9cefac25c637d942fdabbb_cryptolocker.exe	90
PID 1388 wrote to memory of 880	1388	2024-01-28_4fd641b34a9cefac25c637d942fdabbb_cryptolocker.exe	90
PID 1388 wrote to memory of 880	1388	2024-01-28_4fd641b34a9cefac25c637d942fdabbb_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-01-28_4fd641b34a9cefac25c637d942fdabbb_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-28_4fd641b34a9cefac25c637d942fdabbb_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1388
- 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:880

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
59KB

MD5
9829dbea5d74c51c7c8fca8d68236841

SHA1
83b91474e64ac725524a23d77531a92e32a72261

SHA256
845a7e2b48555d304f3abd9e92d1201b3299a97176b2277f2d142d21b9b4392d

SHA512
7fe3fa845fe38d60f1960cf51c16d3e4cb3394f2a1baeb02a73e1d3991e736ce8cd44c28304d5c6448f47e17286988e852b0cb25f4ad4b2153b0e7bd6296b057

Download Submit
memory/880-20-0x00000000006F0000-0x00000000006F6000-memory.dmp

Filesize
24KB

Download
memory/1388-0-0x0000000000740000-0x0000000000746000-memory.dmp

Filesize
24KB

Download
memory/1388-1-0x0000000000740000-0x0000000000746000-memory.dmp

Filesize
24KB

Download
memory/1388-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download