95e932d38518aa89101c8dd6187078667d04f4c4383d3eafbd92f6159b6b8ff9

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
08/04/2024, 12:32

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General

Target

2024-04-08_539de677a3307a34083199a9adc922e5_cryptolocker.exe
Size

128KB
MD5

539de677a3307a34083199a9adc922e5
SHA1

17828c1e0605e276aa0359c998de6b2ee906642b
SHA256

95e932d38518aa89101c8dd6187078667d04f4c4383d3eafbd92f6159b6b8ff9
SHA512

f76fdaca10a6fce8bbbf9af87264fa9d2761dbf0b22546c19c5a93a8892a47f8e9ba0affe719694f63269c3855486536a57846f9343a4381da0517d9f1451038
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgp699GNtL1eI7k:AnBdOOtEvwDpj6zN

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3944-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000d00000002311e-13.dat	CryptoLocker_rule2
behavioral2/memory/3944-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2248-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3944-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000d00000002311e-13.dat	CryptoLocker_set1
behavioral2/memory/3944-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2248-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3944-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x000d00000002311e-13.dat	UPX
behavioral2/memory/3944-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/2248-26-0x0000000000500000-0x000000000050F000-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-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation	2024-04-08_539de677a3307a34083199a9adc922e5_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2248	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3944-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x000d00000002311e-13.dat	upx
behavioral2/memory/3944-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/2248-26-0x0000000000500000-0x000000000050F000-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 3944 wrote to memory of 2248	3944	2024-04-08_539de677a3307a34083199a9adc922e5_cryptolocker.exe	85
PID 3944 wrote to memory of 2248	3944	2024-04-08_539de677a3307a34083199a9adc922e5_cryptolocker.exe	85
PID 3944 wrote to memory of 2248	3944	2024-04-08_539de677a3307a34083199a9adc922e5_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-04-08_539de677a3307a34083199a9adc922e5_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-08_539de677a3307a34083199a9adc922e5_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3944
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2248

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
128KB

MD5
b2ca5a972104ebfbd9464148f97ddeae

SHA1
79b0ee8cb14e33742a74a2c6a82573e8a0c732b0

SHA256
5a48f52d3c5d4a57719d7112691695d2edd698a2ac331dc04b0848adbb21429f

SHA512
913c2abd7b935a1ce24c3dfbb9fd847995d50b0c9ad173ef0388de72c5e67456f62a16ce22c8f2cf4b82f020e3dc5db7623149c0e086d0607d01ddc1b5dcc719

Download Submit
memory/2248-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/2248-25-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2248-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3944-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3944-1-0x00000000007F0000-0x00000000007F6000-memory.dmp

Filesize
24KB

Download
memory/3944-2-0x00000000007F0000-0x00000000007F6000-memory.dmp

Filesize
24KB

Download
memory/3944-3-0x00000000021B0000-0x00000000021B6000-memory.dmp

Filesize
24KB

Download
memory/3944-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download