a19f49bc321326c5361f10fc216789bb894f993ccbe9c8530a661d8711be0aa1

Analysis

max time kernel
143s
max time network
154s
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, 14:27

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General

Target

2024-02-04_4d6be2cd723c8d005fcd8d011bcc27c8_cryptolocker.exe
Size

37KB
MD5

4d6be2cd723c8d005fcd8d011bcc27c8
SHA1

55e7cbe8ff59177b241af8983ab963b4f5b258ae
SHA256

a19f49bc321326c5361f10fc216789bb894f993ccbe9c8530a661d8711be0aa1
SHA512

69a3684d7b5340fec6dd366aac71f9efa8d00f36c329a6c31fdb563f24e5758f2e2ff939ba91080144d4478aab84af927c81df9b5ed60f314d78cf729ba20095
SSDEEP

384:btBYQg/WIEhUCSNyepEjYnDOAlzVol6U/zzo+tkq4XDIwNiJXxXuni8LBEc:btB9g/WItCSsAGjX7e9N0hunLSc

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x00070000000231f5-12.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-1-5-21-635608581-3370340891-292606865-1000\Control Panel\International\Geo\Nation	2024-02-04_4d6be2cd723c8d005fcd8d011bcc27c8_cryptolocker.exe
Key value queried	\REGISTRY\USER\S-1-5-21-635608581-3370340891-292606865-1000\Control Panel\International\Geo\Nation	gewos.exe

Executes dropped EXE 1 IoCs

pid	Process
3288	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 636 wrote to memory of 3288	636	2024-02-04_4d6be2cd723c8d005fcd8d011bcc27c8_cryptolocker.exe	83
PID 636 wrote to memory of 3288	636	2024-02-04_4d6be2cd723c8d005fcd8d011bcc27c8_cryptolocker.exe	83
PID 636 wrote to memory of 3288	636	2024-02-04_4d6be2cd723c8d005fcd8d011bcc27c8_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-02-04_4d6be2cd723c8d005fcd8d011bcc27c8_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-04_4d6be2cd723c8d005fcd8d011bcc27c8_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:636
- 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:3288

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
37KB

MD5
6954f4f685e2f56fa2749c42ebe8cd30

SHA1
80035c1ea6f84771754ba3bd1bcb968e51cbdfde

SHA256
460cfc8580e0008385c87a6f3fe894c2effbcd644189c8b140199134e978736a

SHA512
33cbe9cf73dbe1f94cec72ad3bdb47b18b214596c7e51364d919bf6285a5c8bc8d992704269246bc7f82b364fc737fced7a4ca99e334411e0fe1a28bd344ccbd

Download Submit
memory/636-0-0x0000000000730000-0x0000000000736000-memory.dmp

Filesize
24KB

Download
memory/636-1-0x0000000000730000-0x0000000000736000-memory.dmp

Filesize
24KB

Download
memory/636-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/3288-21-0x00000000005F0000-0x00000000005F6000-memory.dmp

Filesize
24KB

Download