fb815dc3d683c7d3e0dc92a8b4738b473c2a680a074cb28797a00497dfe6c497

Analysis

max time kernel
150s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240221-en
resource tags

arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
submitted
21/02/2024, 14:02

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General

Target

2024-02-21_b88a28575a5076cadfe51fdc7bcb49a1_cryptolocker.exe
Size

46KB
MD5

b88a28575a5076cadfe51fdc7bcb49a1
SHA1

a459854f46b6017135caffdd89285828fd435e33
SHA256

fb815dc3d683c7d3e0dc92a8b4738b473c2a680a074cb28797a00497dfe6c497
SHA512

af62c7385c414ebc8b16160b29ac0da1d03eb8e1f4c1f76339a03f72781f7699dd1ca88b52bc08ebf9ab0f7cb732fee227ab5f33f5071653aa5e0b4c796952f2
SSDEEP

768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05W2Moo9i:qmbhXDmjr5MOtEvwDpj5cDtKkQZQS9xg

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1436-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00080000000231fa-13.dat	CryptoLocker_rule2
behavioral2/memory/1436-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4784-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/1436-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4784-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1436-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x00080000000231fa-13.dat	UPX
behavioral2/memory/1436-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4784-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

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-1-5-21-1414748551-1520717498-2956787782-1000\Control Panel\International\Geo\Nation	2024-02-21_b88a28575a5076cadfe51fdc7bcb49a1_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4784	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 1436 wrote to memory of 4784	1436	2024-02-21_b88a28575a5076cadfe51fdc7bcb49a1_cryptolocker.exe	86
PID 1436 wrote to memory of 4784	1436	2024-02-21_b88a28575a5076cadfe51fdc7bcb49a1_cryptolocker.exe	86
PID 1436 wrote to memory of 4784	1436	2024-02-21_b88a28575a5076cadfe51fdc7bcb49a1_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-02-21_b88a28575a5076cadfe51fdc7bcb49a1_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-21_b88a28575a5076cadfe51fdc7bcb49a1_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1436
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4784

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
47KB

MD5
59eaa8a550e1cefd5788bb707d397e09

SHA1
4ecc34f51a36bf27b133d0f51933803f47fdfe61

SHA256
bb8ff88f490cb5ad5fa9f95ec6f9d72a5da0d086971c14caea74806a7f9e06f2

SHA512
12be4b077d460fee2032adce67f250e55c858a5bfaa029951945cf2246beb2f80a591700adb8814a6e668ad8535d6b4aa34a852524b0c797d82de29398215286

Download Submit
memory/1436-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1436-1-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/1436-2-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/1436-3-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/1436-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4784-19-0x0000000000640000-0x0000000000646000-memory.dmp

Filesize
24KB

Download
memory/4784-20-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/4784-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download