996130b46224bc91f71aaf9c787db3e482b4e6c0abaf32242ca2a2e0cc666914

Analysis

max time kernel
150s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
17/04/2024, 08:47

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General

Target

2024-04-17_ddf831abb9713681e0a12a52a7c1af91_cryptolocker.exe
Size

68KB
MD5

ddf831abb9713681e0a12a52a7c1af91
SHA1

b1d8b7bd592409ebf8cf6f6ff873d3c71f303736
SHA256

996130b46224bc91f71aaf9c787db3e482b4e6c0abaf32242ca2a2e0cc666914
SHA512

252667f5be26eacbfd2980aa8b1035733dd7d4a8aea437e78b2951a02b4efa47f6db21ebcf6da1ece6870b097be973fdfa4270cd4e485e93c954fdbbd7510a19
SSDEEP

768:quVbxjgQNQXtckstOOtEvwDpjAaDOK6PsED3VK2+ZtyOjgO4r9vFAg2rq6W1A1PM:quJu9cvMOtEvwDpjWYTjipvF2bx1PQAM

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1604-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023281-13.dat	CryptoLocker_rule2
behavioral2/memory/1604-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4744-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1604-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0007000000023281-13.dat	CryptoLocker_set1
behavioral2/memory/1604-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4744-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1604-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x0007000000023281-13.dat	UPX
behavioral2/memory/1604-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/4744-26-0x0000000000500000-0x000000000050F000-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-1-5-21-776854024-226333264-2052258302-1000\Control Panel\International\Geo\Nation	2024-04-17_ddf831abb9713681e0a12a52a7c1af91_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4744	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1604-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x0007000000023281-13.dat	upx
behavioral2/memory/1604-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/4744-26-0x0000000000500000-0x000000000050F000-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 1604 wrote to memory of 4744	1604	2024-04-17_ddf831abb9713681e0a12a52a7c1af91_cryptolocker.exe	85
PID 1604 wrote to memory of 4744	1604	2024-04-17_ddf831abb9713681e0a12a52a7c1af91_cryptolocker.exe	85
PID 1604 wrote to memory of 4744	1604	2024-04-17_ddf831abb9713681e0a12a52a7c1af91_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-04-17_ddf831abb9713681e0a12a52a7c1af91_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-17_ddf831abb9713681e0a12a52a7c1af91_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1604
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4744

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
68KB

MD5
13d051de52a9cdff33a5c7e6620f2a02

SHA1
fdfe1475e12fb915435a54eff6cd5e676e6100a2

SHA256
1ecfb2f4e3a38a6b9b83cfd055a3518f7ab421ff67a6020854a58481316eef34

SHA512
d5b089dd28ec26d12ae0ce295e97c064f03699272fdf3b438a1a71d3a4a98ebdbc3fc85d1a4916c165a423bd532c357c507b40be5f01feb5636c0fef39cf8041

Download Submit
memory/1604-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1604-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1604-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1604-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1604-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4744-19-0x0000000001FF0000-0x0000000001FF6000-memory.dmp

Filesize
24KB

Download
memory/4744-20-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/4744-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download