8a8cc289e8d79b12cc5926bc12beee8ed839480acf96e820720477294ad46f1f

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
22-05-2024 21:50

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-05-22_8ab105736c9183bafb447f25b41bd9a1_cryptolocker.exe
Size

39KB
MD5

8ab105736c9183bafb447f25b41bd9a1
SHA1

9d349be5652a8f6a0a5231cce0a309118554f046
SHA256

8a8cc289e8d79b12cc5926bc12beee8ed839480acf96e820720477294ad46f1f
SHA512

b50e967b7215faf74eddbae75c8f1cbf2a56e4a8e39eb67e6851fd56059368c4cd8e7e586fb202d1f09abf234191317e1e148d10eb525a0b98ab524fd35512ef
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYaB/:qDdFJy3QMOtEvwDpjjWMl7Tdp

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2772-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/2772-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3020-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3020-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2772-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/2772-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3020-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3020-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2772-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/2772-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3020-19-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3020-28-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-22_8ab105736c9183bafb447f25b41bd9a1_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-540404634-651139247-2967210625-1000\Control Panel\International\Geo\Nation	2024-05-22_8ab105736c9183bafb447f25b41bd9a1_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

3020 asih.exe

pid	process
3020	asih.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/2772-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/2772-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3020-19-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3020-28-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-22_8ab105736c9183bafb447f25b41bd9a1_cryptolocker.exe

description	pid	process	target process
PID 2772 wrote to memory of 3020	2772	2024-05-22_8ab105736c9183bafb447f25b41bd9a1_cryptolocker.exe	asih.exe
PID 2772 wrote to memory of 3020	2772	2024-05-22_8ab105736c9183bafb447f25b41bd9a1_cryptolocker.exe	asih.exe
PID 2772 wrote to memory of 3020	2772	2024-05-22_8ab105736c9183bafb447f25b41bd9a1_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_8ab105736c9183bafb447f25b41bd9a1_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_8ab105736c9183bafb447f25b41bd9a1_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2772

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:3020

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
39KB

MD5
f8b1e4d5761877840883f5815f3ff145

SHA1
45d4c63b9c2f64777d92ab889cbb7dde32cdf4ce

SHA256
264e95a34ed1c62969958a44690fce7808c04ee83b7a061a7bd70d9babe62206

SHA512
d20dc38022c7da2a93cd5b14c4738b4d849b1407903855bdf1236a5a794e2179c5e36abd5200ccdb62a8acc9dedc34a2a5a142082b9f8bad523a881e8db6c5bc

Download Submit
memory/2772-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2772-1-0x0000000000560000-0x0000000000566000-memory.dmp

Filesize
24KB

Download
memory/2772-2-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/2772-9-0x0000000000560000-0x0000000000566000-memory.dmp

Filesize
24KB

Download
memory/2772-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3020-19-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3020-24-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/3020-27-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/3020-28-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download