e04e7123636fb7a9e6bc812585e997f3fcb278e6a59062df48643b1f5c4e573a

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
01/05/2024, 04:24

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General

Target

2024-05-01_7e88cc7dd48c016f10e9a568add51492_cryptolocker.exe
Size

50KB
MD5

7e88cc7dd48c016f10e9a568add51492
SHA1

e2d2edc2e9c85b2c7dfc28243147401f5b0e97fa
SHA256

e04e7123636fb7a9e6bc812585e997f3fcb278e6a59062df48643b1f5c4e573a
SHA512

ec0748c0374c78717df73bc5e51104d305a685ddab9078907f840f89c96cca0352f4b28fe9dfa5542309266ca693320c64aea9c2aef8d9c69cfaf60dbb42395e
SSDEEP

768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05W2MoccO:qmbhXDmjr5MOtEvwDpj5cDtKkQZQ0

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/1368-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000c000000023b48-13.dat	CryptoLocker_rule2
behavioral2/memory/1368-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4356-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4356-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/1368-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4356-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4356-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/1368-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000c000000023b48-13.dat	UPX
behavioral2/memory/1368-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4356-19-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4356-26-0x0000000000500000-0x0000000000510000-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2818691465-3043947619-2475182763-1000\Control Panel\International\Geo\Nation	2024-05-01_7e88cc7dd48c016f10e9a568add51492_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4356	asih.exe

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 1368 wrote to memory of 4356	1368	2024-05-01_7e88cc7dd48c016f10e9a568add51492_cryptolocker.exe	85
PID 1368 wrote to memory of 4356	1368	2024-05-01_7e88cc7dd48c016f10e9a568add51492_cryptolocker.exe	85
PID 1368 wrote to memory of 4356	1368	2024-05-01_7e88cc7dd48c016f10e9a568add51492_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-05-01_7e88cc7dd48c016f10e9a568add51492_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-01_7e88cc7dd48c016f10e9a568add51492_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1368
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4356

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
50KB

MD5
f87e45a6d780d212792e710d64fbe1c7

SHA1
da637a8db9d495791b52fa0c238ba6641eb75918

SHA256
4d836a87a761c8470f76b07b3617b967729eb93dfb54e5ea62ea859782a1173e

SHA512
343852345b51afb2a1650358c484c07aa9400e9f8a38cd91e2850caa70f793afdd6b9c1d949b01031cb8874cae9e1709d82fb4cb543d95a3aaa4699015020093

Download Submit
memory/1368-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1368-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1368-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1368-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1368-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4356-19-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4356-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download