e598ef79d32a5c6600a1c8c11bf7b439ba3a48803115541107f6b79208e11eb6

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
10/04/2024, 19:30

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General

Target

2024-04-10_5d2fc1bbba45c1366d70a9a9d436c8b0_cryptolocker.exe
Size

129KB
MD5

5d2fc1bbba45c1366d70a9a9d436c8b0
SHA1

d42b66c2a5f14cdec45dbd002b52ab81cc3cc1bd
SHA256

e598ef79d32a5c6600a1c8c11bf7b439ba3a48803115541107f6b79208e11eb6
SHA512

f30dcdda6d24e1ede446216315430acdb6b666ec67e93d4dfee4bb15e34379864bfb3c916c94825968cf07c5032a98eb9cfbf98d31f9f07b4ecb9bd4a6cf6351
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgp699GNtL1eI7H:AnBdOOtEvwDpj6zK

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3592-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00090000000224e9-13.dat	CryptoLocker_rule2
behavioral2/memory/3592-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3788-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3592-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00090000000224e9-13.dat	CryptoLocker_set1
behavioral2/memory/3592-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3788-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3592-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x00090000000224e9-13.dat	UPX
behavioral2/memory/3592-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/3788-26-0x0000000000500000-0x000000000050F000-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-1-5-21-3270530367-132075249-2153716227-1000\Control Panel\International\Geo\Nation	2024-04-10_5d2fc1bbba45c1366d70a9a9d436c8b0_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3788	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3592-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x00090000000224e9-13.dat	upx
behavioral2/memory/3592-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/3788-26-0x0000000000500000-0x000000000050F000-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 3592 wrote to memory of 3788	3592	2024-04-10_5d2fc1bbba45c1366d70a9a9d436c8b0_cryptolocker.exe	84
PID 3592 wrote to memory of 3788	3592	2024-04-10_5d2fc1bbba45c1366d70a9a9d436c8b0_cryptolocker.exe	84
PID 3592 wrote to memory of 3788	3592	2024-04-10_5d2fc1bbba45c1366d70a9a9d436c8b0_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-04-10_5d2fc1bbba45c1366d70a9a9d436c8b0_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-10_5d2fc1bbba45c1366d70a9a9d436c8b0_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3592
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3788

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
129KB

MD5
b16873b30141a2d1000be2b14c59b5ae

SHA1
c595d560172c3860730f4f434035d1eb6bf4f22b

SHA256
e296478bd44c7bbc1d8a054c39e6aa0921e42044b532163987c5b81551aa5f38

SHA512
c8674eec84de6b747a1ab9daced2890a5f0d883c465ffaa573a176abb566e15e16f11f75f47efed1714a5980d74699d82c91ec0cac9e208c1c948cf8198bf7c0

Download Submit
memory/3592-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3592-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/3592-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/3592-3-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/3592-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3788-19-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/3788-21-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/3788-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download