451a95132d7da7aa3529276572a09d75af538bd21f30070d4f7dbd0a71e1f61b

Analysis

max time kernel
150s
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
25/05/2024, 21:26

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General

Target

2024-05-25_50e4fe3073a1156b8721903c0663321f_cryptolocker.exe
Size

90KB
MD5

50e4fe3073a1156b8721903c0663321f
SHA1

47435cc78ca641f17687f96a13484e003836eb0f
SHA256

451a95132d7da7aa3529276572a09d75af538bd21f30070d4f7dbd0a71e1f61b
SHA512

a544451d7e2eaf6260a3e21164360b5e66be244d531448c9abff742680353e38fa52e0359d56257eadb31fd26651b8b5f960c81c9d95aa0fe4abf047c55ac1a2
SSDEEP

1536:n6QFElP6n+g9u9cvMOtEvwDpjYYTjipvF2bx1PQAyT:n6a+1SEOtEvwDpjYYvQd2PO

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/3372-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000800000002328e-13.dat	CryptoLocker_rule2
behavioral2/memory/1960-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3372-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1960-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/3372-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000800000002328e-13.dat	CryptoLocker_set1
behavioral2/memory/1960-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3372-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1960-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/3372-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000800000002328e-13.dat	UPX
behavioral2/memory/1960-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3372-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1960-27-0x0000000000500000-0x0000000000510000-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-05-25_50e4fe3073a1156b8721903c0663321f_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1960	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3372-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000800000002328e-13.dat	upx
behavioral2/memory/1960-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3372-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1960-27-0x0000000000500000-0x0000000000510000-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

description	pid	Process	procid_target
PID 3372 wrote to memory of 1960	3372	2024-05-25_50e4fe3073a1156b8721903c0663321f_cryptolocker.exe	83
PID 3372 wrote to memory of 1960	3372	2024-05-25_50e4fe3073a1156b8721903c0663321f_cryptolocker.exe	83
PID 3372 wrote to memory of 1960	3372	2024-05-25_50e4fe3073a1156b8721903c0663321f_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-05-25_50e4fe3073a1156b8721903c0663321f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-25_50e4fe3073a1156b8721903c0663321f_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3372
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1960

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
90KB

MD5
25384d6f4884a2d9548ebf70d04ad73f

SHA1
52364833ba6de6694a26308e5adafd8d9c2ded7c

SHA256
f3f727190ec4e0eb7e8fb57632c876af948da13cf72e5acac8d25d0fe4278d5e

SHA512
c1e9272352f0847baeadfc4f2b549f81a785c93006b178bad938f1e1590fc6f9c97a57de72b50b8cdbba01d2c89e49d47f721b9eacfdd766208be3397d2bb293

Download Submit
memory/1960-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1960-21-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/1960-20-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/1960-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3372-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3372-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/3372-2-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/3372-9-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/3372-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download