b9273927c2703c5c996f3bffb4617744f9dcdf9444e9bc5cf5c2c6ecc6c46e70

Analysis

max time kernel
150s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240221-en
resource tags

arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
submitted
25/02/2024, 02:42

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General

Target

2024-02-25_a791b39ef4640d6e8f1a01f2177f00d9_cryptolocker.exe
Size

43KB
MD5

a791b39ef4640d6e8f1a01f2177f00d9
SHA1

46b523056a5892dce676015ea4c282943d493e6b
SHA256

b9273927c2703c5c996f3bffb4617744f9dcdf9444e9bc5cf5c2c6ecc6c46e70
SHA512

08af77a032f7d76ced2acf03a06b384be82e8930cab3c0366d8b36181a181fc98a778c5d94dfe2a015b1fb41a1e83b450f1e606fb5208eabecc542e0ccce8322
SSDEEP

768:btB9g/WItCSsAGjX7r3BPOMHocM4vUUOmJ+96eg1le:btB9g/xtCSKfxLIcMzUw96De

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000b00000001e597-12.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-1-5-21-1712835645-2080934712-2142796781-1000\Control Panel\International\Geo\Nation	2024-02-25_a791b39ef4640d6e8f1a01f2177f00d9_cryptolocker.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1712835645-2080934712-2142796781-1000\Control Panel\International\Geo\Nation	gewos.exe

Executes dropped EXE 1 IoCs

pid	Process
3348	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 4080 wrote to memory of 3348	4080	2024-02-25_a791b39ef4640d6e8f1a01f2177f00d9_cryptolocker.exe	87
PID 4080 wrote to memory of 3348	4080	2024-02-25_a791b39ef4640d6e8f1a01f2177f00d9_cryptolocker.exe	87
PID 4080 wrote to memory of 3348	4080	2024-02-25_a791b39ef4640d6e8f1a01f2177f00d9_cryptolocker.exe	87

C:\Users\Admin\AppData\Local\Temp\2024-02-25_a791b39ef4640d6e8f1a01f2177f00d9_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-25_a791b39ef4640d6e8f1a01f2177f00d9_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4080
- 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:3348

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
43KB

MD5
e8e9c0ef8c9d71c355eadc29d1ee6875

SHA1
92a82cbe38aff06a40b7ad0227b96107bdfb125a

SHA256
3867038411f68c941f6cb1c28555a4318408a6deaf328310c9724e842340828a

SHA512
75ac8304b767970990533bc1e9cc8dc87a94ce4caf39fdc3f33a79de4ff09c8488635bea3a53dbb3eb864e2d96d3afa27febba75538fc3b6a6e2f8ed20454288

Download Submit
memory/3348-21-0x0000000000760000-0x0000000000766000-memory.dmp

Filesize
24KB

Download
memory/4080-0-0x0000000002E90000-0x0000000002E96000-memory.dmp

Filesize
24KB

Download
memory/4080-1-0x0000000002E90000-0x0000000002E96000-memory.dmp

Filesize
24KB

Download
memory/4080-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download