890325fad3f9c772484726594a1fde37c309cbeb71c82f1cecf39babc26daba7

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
23-05-2024 08:43

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General

Target

2024-05-23_3fb77ce9ba423af7b51d3559ffaea13b_cryptolocker.exe
Size

51KB
MD5

3fb77ce9ba423af7b51d3559ffaea13b
SHA1

a265e9c35a1a7e6b100abd6366b5f215ca172d52
SHA256

890325fad3f9c772484726594a1fde37c309cbeb71c82f1cecf39babc26daba7
SHA512

9d5db0724800a7e0e5df22829a7505a71bb8385c6a61b64ac2005c106d15b4cc6676648ccb587a73d2f52ca76d7009561892d186b986b4658401a8a8c6f273b1
SSDEEP

768:X6LsoEEeegiZPvEhHSG+gp/QtOOtEvwDpjBaaEqbIu55id3AMWZU0:X6QFElP6n+gJQMOtEvwDpjB0GIWiWLq0

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x0008000000022f51-12.dat	CryptoLocker_rule2

Detection of Cryptolocker Samples 1 IoCs

resource	yara_rule
behavioral2/files/0x0008000000022f51-12.dat	CryptoLocker_set1

Checks computer location settings 2 TTPs 1 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-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	2024-05-23_3fb77ce9ba423af7b51d3559ffaea13b_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4220	asih.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 4656 wrote to memory of 4220	4656	2024-05-23_3fb77ce9ba423af7b51d3559ffaea13b_cryptolocker.exe	83
PID 4656 wrote to memory of 4220	4656	2024-05-23_3fb77ce9ba423af7b51d3559ffaea13b_cryptolocker.exe	83
PID 4656 wrote to memory of 4220	4656	2024-05-23_3fb77ce9ba423af7b51d3559ffaea13b_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-05-23_3fb77ce9ba423af7b51d3559ffaea13b_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_3fb77ce9ba423af7b51d3559ffaea13b_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4656
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4220

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\asih.exe

Filesize
51KB

MD5
94595d7134892878a388b94b03da88e1

SHA1
e1e27bbb28ba1a3bea60e142dab7dd04dcace1bb

SHA256
4d214cb91d83f49ca5db453b3e51d43821c6b914774dd26dd2cc06f834af41d2

SHA512
dda1315bc624285e8f44317b227360afb8572d50d4674d77446544b314124deb85a48341520ac530d546d725cedb77ca23daf5e1e47c6be4048a24a42160fa7b

Download Submit
memory/4220-17-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4220-23-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4656-0-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/4656-1-0x00000000006E0000-0x00000000006E6000-memory.dmp

Filesize
24KB

Download
memory/4656-8-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download