db742bc2e5d262b12135e00c861a791973f9a81246c365ec1d382ecda099c769

Analysis

max time kernel
149s
max time network
158s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
29/03/2024, 03:29

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General

Target

2024-03-29_14382829bf5436e7db7325a162d5d8ff_cryptolocker.exe
Size

48KB
MD5

14382829bf5436e7db7325a162d5d8ff
SHA1

183b58e4a5b68b9ff8489d4eab520ea741589867
SHA256

db742bc2e5d262b12135e00c861a791973f9a81246c365ec1d382ecda099c769
SHA512

593b7c9ca58efc6fb27daf68d36cbab60afc6af08d5cea1fa8a2b24dbf0f8a25caa16c9201f1d2e1d53e37f60a0b0a7cdc530855a02b037318f735f999e5c7c5
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQ6uMcl:BbdDmjr+OtEvwDpjMx

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2512-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000700000002320d-13.dat	CryptoLocker_rule2
behavioral2/memory/2512-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/5040-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/2512-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/5040-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2512-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000700000002320d-13.dat	UPX
behavioral2/memory/2512-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/5040-26-0x0000000000500000-0x0000000000510000-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-1-5-21-3045580317-3728985860-206385570-1000\Control Panel\International\Geo\Nation	2024-03-29_14382829bf5436e7db7325a162d5d8ff_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
5040	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 2512 wrote to memory of 5040	2512	2024-03-29_14382829bf5436e7db7325a162d5d8ff_cryptolocker.exe	86
PID 2512 wrote to memory of 5040	2512	2024-03-29_14382829bf5436e7db7325a162d5d8ff_cryptolocker.exe	86
PID 2512 wrote to memory of 5040	2512	2024-03-29_14382829bf5436e7db7325a162d5d8ff_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-03-29_14382829bf5436e7db7325a162d5d8ff_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-29_14382829bf5436e7db7325a162d5d8ff_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2512
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:5040

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
48KB

MD5
fc167bb1a8b36f6bb3e05b8776ad7a5b

SHA1
0282162efdcb7bb29f9a35c7b270e4f4b04b43f9

SHA256
952485207186f8a7d958f76b202064a4d36bfc9ec3ccfa66e2dbfaf831f64c9f

SHA512
fc0d1db62e55702e18ac6324276f35775c5bc12006f847ccb68f4ed474b18d09af8812d3522f8b0a3d9d915c9c47643d115c487c1d5592e97c0008cfd492e915

Download Submit
memory/2512-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2512-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2512-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2512-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/2512-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/5040-19-0x0000000000760000-0x0000000000766000-memory.dmp

Filesize
24KB

Download
memory/5040-24-0x0000000000740000-0x0000000000746000-memory.dmp

Filesize
24KB

Download
memory/5040-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download