4fa958cdab0abea48ce4e9418b1343cc721ae73fe394c03be09f09d9bceaa450

Analysis

max time kernel
149s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
27/01/2024, 11:22

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-01-27_00251473e2b3a371b8081c0404aa1c1c_cryptolocker.exe
Size

94KB
MD5

00251473e2b3a371b8081c0404aa1c1c
SHA1

4265fe0713f5bbadbdd678883b4fea14f2eb578f
SHA256

4fa958cdab0abea48ce4e9418b1343cc721ae73fe394c03be09f09d9bceaa450
SHA512

0736c0a689513c2d9489932547fa929406240c95a9dca6355460ceacc81d024cd69114724cd5c22233f33468a859890d1387dfe44fbfb0c644d06a13a6198a3a
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgp015:AnBdOOtEvwDpj6z7

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4940-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00070000000231fa-13.dat	CryptoLocker_rule2
behavioral2/memory/4940-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4760-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4940-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00070000000231fa-13.dat	CryptoLocker_set1
behavioral2/memory/4940-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4760-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4940-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x00070000000231fa-13.dat	UPX
behavioral2/memory/4940-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/4760-26-0x0000000000500000-0x000000000050F000-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-1-5-21-983843758-932321429-1636175382-1000\Control Panel\International\Geo\Nation	2024-01-27_00251473e2b3a371b8081c0404aa1c1c_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4760	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4940-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x00070000000231fa-13.dat	upx
behavioral2/memory/4940-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/4760-26-0x0000000000500000-0x000000000050F000-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 4940 wrote to memory of 4760	4940	2024-01-27_00251473e2b3a371b8081c0404aa1c1c_cryptolocker.exe	88
PID 4940 wrote to memory of 4760	4940	2024-01-27_00251473e2b3a371b8081c0404aa1c1c_cryptolocker.exe	88
PID 4940 wrote to memory of 4760	4940	2024-01-27_00251473e2b3a371b8081c0404aa1c1c_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-01-27_00251473e2b3a371b8081c0404aa1c1c_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-27_00251473e2b3a371b8081c0404aa1c1c_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4940
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4760

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
94KB

MD5
118fd940c21516f5768d9a7e10671e34

SHA1
de2514628a121a8212359f0e861be0acb9c6a41d

SHA256
3ffeb4e33f5db419140e01b0a9524fddf3c13c32546018bd57853307889d33b7

SHA512
1f820727a25ea696d1cb0d874df472fe235b62388c3418ee3300e275fcdd8a90480cab1f87c67a9236f3aa2ac4628be82a010f996b5e86695204003e5032331d

Download Submit
memory/4760-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4760-23-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4760-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4940-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4940-1-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/4940-2-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/4940-3-0x0000000002230000-0x0000000002236000-memory.dmp

Filesize
24KB

Download
memory/4940-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download