bc45f5b81ccc96507a314c27b34f20ee61a674128e54dd5dc2171a312c9540f9

Analysis

max time kernel
150s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
14/02/2024, 03:59

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General

Target

2024-02-14_7d50d9c5b6f7d3c59e6780ddb1c03e17_cryptolocker.exe
Size

93KB
MD5

7d50d9c5b6f7d3c59e6780ddb1c03e17
SHA1

da036d2036fcec1b2e43b93caf662becc15a4b30
SHA256

bc45f5b81ccc96507a314c27b34f20ee61a674128e54dd5dc2171a312c9540f9
SHA512

6e9339bb6fe27875c777d3df30f54bb1bc3e6aacdebf4a69c3403a44a2e1a4e1e22ed6ab738a1c7414307cb6d4cf0a700c5819166b124a878f538af97c695f97
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgp016:AnBdOOtEvwDpj6zM

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/1952-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000e000000023152-13.dat	CryptoLocker_rule2
behavioral2/memory/4052-19-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1952-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4052-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/1952-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000e000000023152-13.dat	CryptoLocker_set1
behavioral2/memory/4052-19-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1952-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4052-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/1952-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x000e000000023152-13.dat	UPX
behavioral2/memory/4052-19-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/1952-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/4052-27-0x0000000000500000-0x000000000050F000-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-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation	2024-02-14_7d50d9c5b6f7d3c59e6780ddb1c03e17_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4052	asih.exe

UPX packed file 5 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/1952-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x000e000000023152-13.dat	upx
behavioral2/memory/4052-19-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/1952-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/4052-27-0x0000000000500000-0x000000000050F000-memory.dmp	upx

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 1952 wrote to memory of 4052	1952	2024-02-14_7d50d9c5b6f7d3c59e6780ddb1c03e17_cryptolocker.exe	85
PID 1952 wrote to memory of 4052	1952	2024-02-14_7d50d9c5b6f7d3c59e6780ddb1c03e17_cryptolocker.exe	85
PID 1952 wrote to memory of 4052	1952	2024-02-14_7d50d9c5b6f7d3c59e6780ddb1c03e17_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-02-14_7d50d9c5b6f7d3c59e6780ddb1c03e17_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-14_7d50d9c5b6f7d3c59e6780ddb1c03e17_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1952
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4052

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
93KB

MD5
e9fa35c9a66fbe3aad91d8ba32e34b28

SHA1
ed0b3b8700941dd2cee80ac7c4673a499a96d439

SHA256
38d2a8f137e97feebad75fcb46f47db7c6cb6a3560e0ee18a4dd465c9e927e53

SHA512
f2caa685fd16677d50c8c9315253b733ed9b42cbaa859d53f7661eff8394d54f324e48d69dc001cb749de0b044c8c3353687f5caf99481cf1564da7b98b2399c

Download Submit
memory/1952-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1952-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1952-3-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/1952-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1952-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4052-19-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4052-20-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/4052-23-0x0000000000730000-0x0000000000736000-memory.dmp

Filesize
24KB

Download
memory/4052-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download