538b66cb8710498cd0aee1233a1e2bb55f8c451cb2061cc93b68253175c2db5b

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
22/05/2024, 05:56

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General

Target

2024-05-22_803d249989d49db9671138a236cb8036_cryptolocker.exe
Size

41KB
MD5

803d249989d49db9671138a236cb8036
SHA1

054aa449ba310b7ebc9921e6c8f5d4772908bef5
SHA256

538b66cb8710498cd0aee1233a1e2bb55f8c451cb2061cc93b68253175c2db5b
SHA512

17609c1f1532ce385ea19ae7f6fb2c0e4b74d9fd2bcea93909b83aad343be2439b56ddf7f8981edb6dd6bd3d676a5397813e19505a1ef98baeb03b086708d04d
SSDEEP

768:X6LsoEEeegiZPvEhHSG+gp/QtOOtEvwDpjBaac4HKcfr9Oro:X6QFElP6n+gJQMOtEvwDpjBsYK6r0ro

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000900000002341e-12.dat	CryptoLocker_rule2

Detection of Cryptolocker Samples 1 IoCs

resource	yara_rule
behavioral2/files/0x000900000002341e-12.dat	CryptoLocker_set1

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-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-05-22_803d249989d49db9671138a236cb8036_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
400	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 228 wrote to memory of 400	228	2024-05-22_803d249989d49db9671138a236cb8036_cryptolocker.exe	83
PID 228 wrote to memory of 400	228	2024-05-22_803d249989d49db9671138a236cb8036_cryptolocker.exe	83
PID 228 wrote to memory of 400	228	2024-05-22_803d249989d49db9671138a236cb8036_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-05-22_803d249989d49db9671138a236cb8036_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_803d249989d49db9671138a236cb8036_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:228
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:400

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
41KB

MD5
c94de950b5ec443e4f14e68075ffee09

SHA1
b7c939abeeb047c1da5fd07a14e5ab3963d8e85e

SHA256
43cf1473bcd20c53d03942511afabe16a4150f158a4e3b830bb7968478385038

SHA512
ab629b2a278bfbf69f34562f5334c7c429512aa873bde28c2a7ccf11e61aea7115231524b233611d2e16f222a2fc1856ba2252addbe28f22d501c6af2cead9cd

Download Submit
memory/228-0-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/228-1-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/228-8-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/400-17-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/400-23-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download