72a34ac5aabd8009dbee2acd2fdb6be62bfb29fa16e65384e22887c46192ea85

Analysis

max time kernel
148s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
28/03/2024, 03:24

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General

Target

2024-03-28_0246340b9ca915387c85df4645c336ea_cryptolocker.exe
Size

57KB
MD5

0246340b9ca915387c85df4645c336ea
SHA1

f6caeb7b4409bbac8811f3de63f3d9a066a8cfe0
SHA256

72a34ac5aabd8009dbee2acd2fdb6be62bfb29fa16e65384e22887c46192ea85
SHA512

bb4117d6d8c021fb13435b66f458fa601762b3a72c3781e773c6bc27d3e7c813bf6c2fab15ed0726b98f904de094aa0730a5be9dae9b9d4ad8f33fc2a5866d3f
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj9aYa9mpLI:z6a+CdOOtEvwDpjQP

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/704-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000800000002320b-13.dat	CryptoLocker_rule2
behavioral2/memory/704-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4232-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/704-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000800000002320b-13.dat	CryptoLocker_set1
behavioral2/memory/704-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4232-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/704-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000800000002320b-13.dat	UPX
behavioral2/memory/704-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4232-26-0x0000000000500000-0x0000000000510000-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-1-5-21-983155329-280873152-1838004294-1000\Control Panel\International\Geo\Nation	2024-03-28_0246340b9ca915387c85df4645c336ea_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4232	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/704-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000800000002320b-13.dat	upx
behavioral2/memory/704-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4232-26-0x0000000000500000-0x0000000000510000-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 704 wrote to memory of 4232	704	2024-03-28_0246340b9ca915387c85df4645c336ea_cryptolocker.exe	87
PID 704 wrote to memory of 4232	704	2024-03-28_0246340b9ca915387c85df4645c336ea_cryptolocker.exe	87
PID 704 wrote to memory of 4232	704	2024-03-28_0246340b9ca915387c85df4645c336ea_cryptolocker.exe	87

C:\Users\Admin\AppData\Local\Temp\2024-03-28_0246340b9ca915387c85df4645c336ea_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-28_0246340b9ca915387c85df4645c336ea_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:704
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4232

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
57KB

MD5
8c6cf5f4ac018b689f0108b5fbb21c74

SHA1
3a0eb306d4f4276742be8198ec27f0b3d2a23052

SHA256
624233c3f30ca1483fdf053baaa524e72cb6954b5d3d1ad986e7a7a140aa4f5e

SHA512
46da013d838d902a1c6770e7d7267a025051142589adba14ab3712c24a9b71caaaa0fa73cc88dc08e6f82d91394e85bd8fe07df195a9b00ff9fc43204b712842

Download Submit
memory/704-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/704-1-0x0000000000830000-0x0000000000836000-memory.dmp

Filesize
24KB

Download
memory/704-2-0x0000000000830000-0x0000000000836000-memory.dmp

Filesize
24KB

Download
memory/704-3-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/704-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4232-21-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/4232-19-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/4232-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download