4755d2466b59a6c98b87d0d5e48310899c40d94be7d22a574dbabdd631dd9dcc

Analysis

max time kernel
150s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
03/02/2024, 11:28

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-02-03_5153d90af37d0aca1dfec4b35680190e_cryptolocker.exe
Size

104KB
MD5

5153d90af37d0aca1dfec4b35680190e
SHA1

6738203fbce87354ee099f10dfb4d10ba5a96683
SHA256

4755d2466b59a6c98b87d0d5e48310899c40d94be7d22a574dbabdd631dd9dcc
SHA512

8bd0f03fb33033d63793cd4bb68f2e7c67a58fa26c6262264c17ef95c8bb419adaddef74e74ebe8b194484c11881c68713ce39c2109c36085004570b6448026f
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsalRn5iF1j6GksueR:1nK6a+qdOOtEvwDpjH

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3588-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00060000000231b6-13.dat	CryptoLocker_rule2
behavioral2/memory/3588-18-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4556-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3588-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00060000000231b6-13.dat	CryptoLocker_set1
behavioral2/memory/3588-18-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/4556-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3588-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x00060000000231b6-13.dat	UPX
behavioral2/memory/3588-18-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/4556-26-0x0000000000500000-0x000000000050F311-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-1-5-21-1815711207-1844170477-3539718864-1000\Control Panel\International\Geo\Nation	2024-02-03_5153d90af37d0aca1dfec4b35680190e_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4556	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3588-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x00060000000231b6-13.dat	upx
behavioral2/memory/3588-18-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/4556-26-0x0000000000500000-0x000000000050F311-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 3588 wrote to memory of 4556	3588	2024-02-03_5153d90af37d0aca1dfec4b35680190e_cryptolocker.exe	79
PID 3588 wrote to memory of 4556	3588	2024-02-03_5153d90af37d0aca1dfec4b35680190e_cryptolocker.exe	79
PID 3588 wrote to memory of 4556	3588	2024-02-03_5153d90af37d0aca1dfec4b35680190e_cryptolocker.exe	79

C:\Users\Admin\AppData\Local\Temp\2024-02-03_5153d90af37d0aca1dfec4b35680190e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-03_5153d90af37d0aca1dfec4b35680190e_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3588
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4556

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
104KB

MD5
42bd9a63ad84d8b8084fb1d8151e1963

SHA1
a7bd04a2d3d71261233bab651dc087869b4e2ffe

SHA256
bafc750c57ca7f53718127f0bef56c6450cf0a6fcf8d58e60881bd531f7df718

SHA512
aaad18101cf96aae0b07f4424e6bfffe667d17b768434d0f7fb59ace51f857accf386682adbf87fec91b16a9824c40151aae3fc462c3278f86022582f2828ffd

Download Submit
memory/3588-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3588-1-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/3588-2-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/3588-3-0x0000000000760000-0x0000000000766000-memory.dmp

Filesize
24KB

Download
memory/3588-18-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/4556-20-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/4556-19-0x0000000001F80000-0x0000000001F86000-memory.dmp

Filesize
24KB

Download
memory/4556-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download