fc9e09a5107cd542f3b39ca4115403adcd6a7e57c8194d33ef83d9deb803d2c0

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
30/04/2024, 19:10

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-04-30_663fc31ea8e1fc5623b3c03817d2b232_cryptolocker.exe
Size

65KB
MD5

663fc31ea8e1fc5623b3c03817d2b232
SHA1

ff8cae4428a4daa1fcf6a07cd5c6d670eab4b2b7
SHA256

fc9e09a5107cd542f3b39ca4115403adcd6a7e57c8194d33ef83d9deb803d2c0
SHA512

5de0947ceef57ef2893150fdc7c27fcb82e0e6cf12b26873bd4659d7825502792a2917eeefd7b765c8abce849d5f413ce5bdff2b4bb1c85b1ea23ff196b0f256
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjYZ8xDyv:1nK6a+qdOOtEvwDpj8

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4604-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000c000000023b56-13.dat	CryptoLocker_rule2
behavioral2/memory/4604-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3416-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4604-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000c000000023b56-13.dat	CryptoLocker_set1
behavioral2/memory/4604-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/3416-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4604-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x000c000000023b56-13.dat	UPX
behavioral2/memory/4604-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/3416-26-0x0000000000500000-0x000000000050F311-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-1-5-21-17203666-93769886-2545153620-1000\Control Panel\International\Geo\Nation	2024-04-30_663fc31ea8e1fc5623b3c03817d2b232_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3416	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4604-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x000c000000023b56-13.dat	upx
behavioral2/memory/4604-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/3416-26-0x0000000000500000-0x000000000050F311-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 4604 wrote to memory of 3416	4604	2024-04-30_663fc31ea8e1fc5623b3c03817d2b232_cryptolocker.exe	85
PID 4604 wrote to memory of 3416	4604	2024-04-30_663fc31ea8e1fc5623b3c03817d2b232_cryptolocker.exe	85
PID 4604 wrote to memory of 3416	4604	2024-04-30_663fc31ea8e1fc5623b3c03817d2b232_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-04-30_663fc31ea8e1fc5623b3c03817d2b232_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-30_663fc31ea8e1fc5623b3c03817d2b232_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4604
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3416

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
65KB

MD5
cdc86287e67f7be3c4db3a4618fb7e2a

SHA1
01e8570cd10a955cc217c7ecbee3892125985772

SHA256
2a01e45ceb4ba3bd26db3e25dcd92feb29b793b64faad0bb4cda401577fc7546

SHA512
15aebf82c91ffcc2d53d4ed736355b812f2f30ec13c1c662c024d43204d4cb6308060dc2491d895d212601417ce71ebf95f9c9e5d88a01035096c1df9e5581bc

Download Submit
memory/3416-19-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/3416-25-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/3416-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/4604-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/4604-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4604-2-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/4604-9-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4604-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download