af5b958cc9f7f93499552fe545644264a44001ee54b21bfb203a5764240df441

Analysis

max time kernel
139s
max time network
161s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
22-01-2024 15:26

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General

Target

2024-01-22_3759949d3595f56df90230bb6ef3e095_cryptolocker.exe
Size

105KB
MD5

3759949d3595f56df90230bb6ef3e095
SHA1

6c0cf34f7a2bcaefdb1b6c90ebd9ab639f244d5f
SHA256

af5b958cc9f7f93499552fe545644264a44001ee54b21bfb203a5764240df441
SHA512

60cb76885ca4afbb980397a3def04a6833b1771b679473e7b15357ac6f01b003670dc0ddfc5ca82bd3ec04f86cea579617dd284b93c8d2ed6bb5e3b6793368cd
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsalRn5iF1j6Gksk:1nK6a+qdOOtEvwDpjk

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4952-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0009000000022480-13.dat	CryptoLocker_rule2
behavioral2/memory/4952-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4340-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4952-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0009000000022480-13.dat	CryptoLocker_set1
behavioral2/memory/4952-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/4340-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4952-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x0009000000022480-13.dat	UPX
behavioral2/memory/4952-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/4340-26-0x0000000000500000-0x000000000050F311-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-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	2024-01-22_3759949d3595f56df90230bb6ef3e095_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4340	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4952-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x0009000000022480-13.dat	upx
behavioral2/memory/4952-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/4340-26-0x0000000000500000-0x000000000050F311-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 4952 wrote to memory of 4340	4952	2024-01-22_3759949d3595f56df90230bb6ef3e095_cryptolocker.exe	87
PID 4952 wrote to memory of 4340	4952	2024-01-22_3759949d3595f56df90230bb6ef3e095_cryptolocker.exe	87
PID 4952 wrote to memory of 4340	4952	2024-01-22_3759949d3595f56df90230bb6ef3e095_cryptolocker.exe	87

C:\Users\Admin\AppData\Local\Temp\2024-01-22_3759949d3595f56df90230bb6ef3e095_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-22_3759949d3595f56df90230bb6ef3e095_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4952
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4340

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
105KB

MD5
b846d3790f35c3c72dd9d62be5f1293d

SHA1
29ea2463d66fe396f5151fd8117d32477201ce8b

SHA256
b4d2f047a57f03ee17d1cc6d3383be78c6ffebcd9ccc8ed2b7da2497c2fa434b

SHA512
0a03aa3a49ee6143f357d0581326e12bafb91014f0b7049dc27a47d62287e372da0872277af44b7bb17f11607f8c3c336a067275e10bf24228b3eb10e63add0f

Download Submit
memory/4340-19-0x0000000000490000-0x0000000000496000-memory.dmp

Filesize
24KB

Download
memory/4340-20-0x00000000004B0000-0x00000000004B6000-memory.dmp

Filesize
24KB

Download
memory/4340-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/4952-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/4952-1-0x0000000002210000-0x0000000002216000-memory.dmp

Filesize
24KB

Download
memory/4952-2-0x0000000002210000-0x0000000002216000-memory.dmp

Filesize
24KB

Download
memory/4952-3-0x0000000002230000-0x0000000002236000-memory.dmp

Filesize
24KB

Download
memory/4952-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download