9f96e10d0aa85f3c8e7c6a5f952abb4f6441bccf2d1b5bfb43532a0051c98392

Analysis

max time kernel
150s
max time network
162s
platform
windows10-2004_x64
resource
win10v2004-20240221-en
resource tags

arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
submitted
22/02/2024, 23:34

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target

2024-02-22_b64a372b432e46eb2f4acb111748d5fb_cryptolocker.exe
Size

87KB
MD5

b64a372b432e46eb2f4acb111748d5fb
SHA1

5e073694c9652c499904ae30e7380e6f11744cb0
SHA256

9f96e10d0aa85f3c8e7c6a5f952abb4f6441bccf2d1b5bfb43532a0051c98392
SHA512

bdf0049cde96ff26656511f9a7cb74060246398738e6e107d6126fb69ba4dfb13c4b4804bc8e1ff0523b87791cd0036a841a06a2683246a01cea1b232f8e14f3
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgSs:AnBdOOtEvwDpj6zp

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/2604-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00070000000231fb-13.dat	CryptoLocker_rule2
behavioral2/memory/884-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2604-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/884-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/2604-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00070000000231fb-13.dat	CryptoLocker_set1
behavioral2/memory/884-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2604-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/884-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/2604-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x00070000000231fb-13.dat	UPX
behavioral2/memory/884-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/2604-18-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/884-27-0x0000000000500000-0x000000000050F000-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-1-5-21-2200714112-3788720386-2559682836-1000\Control Panel\International\Geo\Nation	2024-02-22_b64a372b432e46eb2f4acb111748d5fb_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
884	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2604-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x00070000000231fb-13.dat	upx
behavioral2/memory/884-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/2604-18-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/884-27-0x0000000000500000-0x000000000050F000-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 2604 wrote to memory of 884	2604	2024-02-22_b64a372b432e46eb2f4acb111748d5fb_cryptolocker.exe	89
PID 2604 wrote to memory of 884	2604	2024-02-22_b64a372b432e46eb2f4acb111748d5fb_cryptolocker.exe	89
PID 2604 wrote to memory of 884	2604	2024-02-22_b64a372b432e46eb2f4acb111748d5fb_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-02-22_b64a372b432e46eb2f4acb111748d5fb_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-22_b64a372b432e46eb2f4acb111748d5fb_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2604
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:884

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
87KB

MD5
40b81c90dc6c2d0307cbcaa20f701c7f

SHA1
f390e6cd8603cbb4301178f59bb1542a872be2e2

SHA256
33968c14ebaade29acac32b85d672877439992432ad0cdf67fdbe105f8852604

SHA512
49ea1990ca53d0911a781965b18ada951bafb4ecffe4d111618a41b55caa2ff60233a14038d996fe88c460689f6347a8e2221992260f8d977871bd247242bf6f

Download Submit
memory/884-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/884-20-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/884-24-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/884-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2604-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2604-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2604-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2604-3-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/2604-18-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download