9540b099f4c7fdadc9b4f80783e099e21ad721f2411667f175de4bfe808605ae

Analysis

max time kernel
148s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
10/05/2024, 23:25

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General

Target

2024-05-10_94728b4d5f8234b02c5d64b338c4714c_cryptolocker.exe
Size

64KB
MD5

94728b4d5f8234b02c5d64b338c4714c
SHA1

890a4bb10d0c2941ca386ac16cefbe9e6cc3e1bc
SHA256

9540b099f4c7fdadc9b4f80783e099e21ad721f2411667f175de4bfe808605ae
SHA512

ff77b2fc6ebe2af35a3433b01b12d97f658c0a5b647328cd7ada4150eb79237864271576a59ac2e1d9257837eecfc396430cd6062bd0eed291a51f6f989852f9
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61vSbgtsiR:BbdDmjr+OtEvwDpjM84

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/1752-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000022f51-13.dat	CryptoLocker_rule2
behavioral2/memory/1620-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1752-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1620-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/1620-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1752-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1620-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/1752-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0008000000022f51-13.dat	UPX
behavioral2/memory/1620-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1752-19-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1620-28-0x0000000000500000-0x0000000000510000-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-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	2024-05-10_94728b4d5f8234b02c5d64b338c4714c_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1620	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 1752 wrote to memory of 1620	1752	2024-05-10_94728b4d5f8234b02c5d64b338c4714c_cryptolocker.exe	83
PID 1752 wrote to memory of 1620	1752	2024-05-10_94728b4d5f8234b02c5d64b338c4714c_cryptolocker.exe	83
PID 1752 wrote to memory of 1620	1752	2024-05-10_94728b4d5f8234b02c5d64b338c4714c_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-05-10_94728b4d5f8234b02c5d64b338c4714c_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-10_94728b4d5f8234b02c5d64b338c4714c_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1752
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1620

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
64KB

MD5
8ddbbb082228a50851c6d98b13c70703

SHA1
7acd0438b6f7302481177720ead8694bc50b72dc

SHA256
cc059f09e00926039ee597d782a1cd5c0b32ce567e428ebb378136318515b892

SHA512
0401a9a3974328cc312c5484232aaf9bec4dfaff76e5eaba39e3b86b66ecdaf595959d303163a72aa39214b6782e47e00a199a50cc0064e7cb4eee0dc7198928

Download Submit
memory/1620-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1620-27-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/1620-28-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1752-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1752-1-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/1752-2-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/1752-9-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/1752-19-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download