96c5fc81ecad2bc2cb55dc65a5034a9341df4abd53e57f44cb6f694ae0bfee09

Analysis

max time kernel
148s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
15/03/2024, 06:25

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General

Target

2024-03-15_32dbb436a5a2c1406ae580f383d9d763_cryptolocker.exe
Size

32KB
MD5

32dbb436a5a2c1406ae580f383d9d763
SHA1

d8b3f233bfca6562caf4adf48f24e007932630b8
SHA256

96c5fc81ecad2bc2cb55dc65a5034a9341df4abd53e57f44cb6f694ae0bfee09
SHA512

75ad04dd3dcbcb6ee7fec2ca3694d0b4281fb5195d323e9e17d0c5eefc8ad4b653d739bdb2057af6dd18676271982b254d9702d62ee08cbede7477752f1fb6c8
SSDEEP

768:q0ZziOWwULueOSdE8tOOtEvwDpjeWaJIOc+4tHbjN:q0zizzOSxMOtEvwDpj/arql

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4644-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000400000001e5eb-13.dat	CryptoLocker_rule2
behavioral2/memory/4644-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3904-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/4644-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3904-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4644-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000400000001e5eb-13.dat	UPX
behavioral2/memory/4644-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3904-26-0x0000000000500000-0x0000000000510000-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-1-5-21-983155329-280873152-1838004294-1000\Control Panel\International\Geo\Nation	2024-03-15_32dbb436a5a2c1406ae580f383d9d763_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3904	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 4644 wrote to memory of 3904	4644	2024-03-15_32dbb436a5a2c1406ae580f383d9d763_cryptolocker.exe	89
PID 4644 wrote to memory of 3904	4644	2024-03-15_32dbb436a5a2c1406ae580f383d9d763_cryptolocker.exe	89
PID 4644 wrote to memory of 3904	4644	2024-03-15_32dbb436a5a2c1406ae580f383d9d763_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-03-15_32dbb436a5a2c1406ae580f383d9d763_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-15_32dbb436a5a2c1406ae580f383d9d763_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4644
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3904

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
32KB

MD5
c6c7cacf696df7d2baa74f23c0e3f74c

SHA1
08f7f370aac985c1a7bca2cee089a06acccbb73f

SHA256
627b3f1c0b48b1c1832bf148fb3da2bb5bce7a2134c6b9a86857c0c1b37702d9

SHA512
577d09e8d1017f38b16df668d4d9c392a1f62581c6db6d047bcf6e7711e79122b7761eceece36f6613d05bcdaaa1ac61d75423aeaf816f0cc824bcb39c0a4e2d

Download Submit
memory/3904-19-0x0000000000760000-0x0000000000766000-memory.dmp

Filesize
24KB

Download
memory/3904-20-0x0000000000740000-0x0000000000746000-memory.dmp

Filesize
24KB

Download
memory/3904-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4644-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4644-1-0x0000000000530000-0x0000000000536000-memory.dmp

Filesize
24KB

Download
memory/4644-2-0x0000000000530000-0x0000000000536000-memory.dmp

Filesize
24KB

Download
memory/4644-3-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/4644-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download