e7b4aa1b77f1b0bef1fe1810c1b8077f5797a0a1a7eb4af6436bdf3a6985844a

Analysis

max time kernel
148s
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 20:32

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General

Target

2024-05-22_44f9b1be57115154447a8b768ebce321_cryptolocker.exe
Size

64KB
MD5

44f9b1be57115154447a8b768ebce321
SHA1

fe625aba3e480ae57f72fe5aac004acfdd4cc3bd
SHA256

e7b4aa1b77f1b0bef1fe1810c1b8077f5797a0a1a7eb4af6436bdf3a6985844a
SHA512

525c6236abbb454cafa291287f18359f57019eddeb6f26a3d999a061ad8b20e7c3a6814606f415437992d647b90c6dcc3831adf389890ae4e3f2a5f8e37afd7a
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61vSbgtsib:BbdDmjr+OtEvwDpjM8W

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4808-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/4808-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4944-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4808-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4944-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4808-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/4808-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4944-26-0x0000000000500000-0x0000000000510000-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_44f9b1be57115154447a8b768ebce321_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1162180587-977231257-2194346871-1000\Control Panel\International\Geo\Nation	2024-05-22_44f9b1be57115154447a8b768ebce321_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

4944 asih.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
4944	asih.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-22_44f9b1be57115154447a8b768ebce321_cryptolocker.exe

description	pid	process	target process
PID 4808 wrote to memory of 4944	4808	2024-05-22_44f9b1be57115154447a8b768ebce321_cryptolocker.exe	asih.exe
PID 4808 wrote to memory of 4944	4808	2024-05-22_44f9b1be57115154447a8b768ebce321_cryptolocker.exe	asih.exe
PID 4808 wrote to memory of 4944	4808	2024-05-22_44f9b1be57115154447a8b768ebce321_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_44f9b1be57115154447a8b768ebce321_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_44f9b1be57115154447a8b768ebce321_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4808

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:4944

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe
Filesize
64KB

MD5
98eef14b748559db808e82864f071615

SHA1
17b97df0110c2558e58263a0582dbc1e5339ca28

SHA256
c055480e391cb8c2211f8d413bb9aa4e3838cdd6f89c102fb2f779778a6e2a95

SHA512
1694bd267e6618ab0988062115151e6df9ff822cd2ddc6471c87a50fc7d34360169209d1b5515534b3f1bb68cd161631c69d87ad2108b9c81938312b68358918

Download Submit
memory/4808-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4808-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4808-8-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4808-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4808-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4944-19-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/4944-25-0x00000000021C0000-0x00000000021C6000-memory.dmp

Filesize
24KB

Download
memory/4944-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download