acb9e1c23f0b66d30d0a52ad30cf299748bad4c80ae53840d324bd1da31bf620

Analysis

max time kernel
147s
max time network
149s
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 02:41

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General

Target

2024-05-22_99d56d1d3eaf8e33d943df9b696d4274_cryptolocker.exe
Size

79KB
MD5

99d56d1d3eaf8e33d943df9b696d4274
SHA1

6d1b3625e7f39ae4da8b533dc815b5be108aba34
SHA256

acb9e1c23f0b66d30d0a52ad30cf299748bad4c80ae53840d324bd1da31bf620
SHA512

e068e76fc4c3677574d43638c51d8ce9c1b262fef91828e52577f55a4f5f5069eb5101200d3059f73701daf0c3de18bfabcfc486c95d271865ac67e9202c891b
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdJcRP:T6a+rdOOtEvwDpjNtO

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4920-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/4228-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4920-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4228-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4920-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/4228-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4920-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4228-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4920-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/4228-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4920-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4228-27-0x0000000000500000-0x0000000000510000-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_99d56d1d3eaf8e33d943df9b696d4274_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000\Control Panel\International\Geo\Nation	2024-05-22_99d56d1d3eaf8e33d943df9b696d4274_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

4228 asih.exe

pid	process
4228	asih.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4920-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/4228-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4920-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4228-27-0x0000000000500000-0x0000000000510000-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_99d56d1d3eaf8e33d943df9b696d4274_cryptolocker.exe

description	pid	process	target process
PID 4920 wrote to memory of 4228	4920	2024-05-22_99d56d1d3eaf8e33d943df9b696d4274_cryptolocker.exe	asih.exe
PID 4920 wrote to memory of 4228	4920	2024-05-22_99d56d1d3eaf8e33d943df9b696d4274_cryptolocker.exe	asih.exe
PID 4920 wrote to memory of 4228	4920	2024-05-22_99d56d1d3eaf8e33d943df9b696d4274_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_99d56d1d3eaf8e33d943df9b696d4274_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_99d56d1d3eaf8e33d943df9b696d4274_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4920

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:4228

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
79KB

MD5
f0c946ac45c0c6d1aedb4f71fb9d652e

SHA1
078e37c59c33fdd4baa431062b425bc02519ebaf

SHA256
a75f52e7c6c7d0fb5fdf200fc691899216465b39c231cf3f3354685874b05c51

SHA512
2b74453c39f0d32c338a03c16c55af25e847de2cfd2f07439a9989b5f45deb4a22105e43f2d0e66cf57a98041f27ab873817cfa21fe5923c1d03797144aac97c

Download Submit
memory/4228-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4228-20-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/4228-26-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/4228-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4920-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4920-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4920-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4920-3-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/4920-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download