30edc5d288fefb97e2b7db973f6eb8f1cf18c59c3325cfe608047c3a8ab37ec5

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
28/02/2024, 04:54

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General

Target

2024-02-28_58bdcea91573a85ec1aa7ad46cdc23cb_cryptolocker.exe
Size

54KB
MD5

58bdcea91573a85ec1aa7ad46cdc23cb
SHA1

8a4d7c680021c5dbf43a79c86be86ba25619b791
SHA256

30edc5d288fefb97e2b7db973f6eb8f1cf18c59c3325cfe608047c3a8ab37ec5
SHA512

4f1c4a9b8fda2b9522a62e63c65cdfbbd8e362af8b436d1356f749bf789b0d44e01125f6c90e7f0aea60d798793ebe1b0e9d21b89fcfecace8984ac9b0949e01
SSDEEP

768:79inqyNR/QtOOtEvwDpjBK/iVTab3GRuv3VylSV/CdvL:79mqyNhQMOtEvwDpjBPY7xv3g8eL

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral2/memory/3952-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000700000001e59e-13.dat	CryptoLocker_rule2
behavioral2/memory/3952-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/3952-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000700000001e59e-13.dat	CryptoLocker_set1
behavioral2/memory/3952-17-0x0000000000500000-0x000000000050F000-memory.dmp	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-1-5-21-399997616-3400990511-967324271-1000\Control Panel\International\Geo\Nation	2024-02-28_58bdcea91573a85ec1aa7ad46cdc23cb_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3492	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 3952 wrote to memory of 3492	3952	2024-02-28_58bdcea91573a85ec1aa7ad46cdc23cb_cryptolocker.exe	89
PID 3952 wrote to memory of 3492	3952	2024-02-28_58bdcea91573a85ec1aa7ad46cdc23cb_cryptolocker.exe	89
PID 3952 wrote to memory of 3492	3952	2024-02-28_58bdcea91573a85ec1aa7ad46cdc23cb_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-02-28_58bdcea91573a85ec1aa7ad46cdc23cb_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-28_58bdcea91573a85ec1aa7ad46cdc23cb_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3952
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3492

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
55KB

MD5
2ff6a2c7c0eb174658e15947d7bcb413

SHA1
de856a7ebb1bd6b47102cbd40c8e1544c3bc8870

SHA256
5c3ee4148cf08b562506e4e8db27379bd4c7d2669bea61fed857984ced6f4e0f

SHA512
6a622dc2c5d2e80527883fc248d50b9cb65f99f6cddb91188c2154b0a905aa42cd6079fbd66e584b0935e1f5de3e98ed6d770f7ba114babebeddf996158e1078

Download Submit
memory/3492-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3492-21-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3952-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3952-1-0x00000000020E0000-0x00000000020E6000-memory.dmp

Filesize
24KB

Download
memory/3952-2-0x00000000020E0000-0x00000000020E6000-memory.dmp

Filesize
24KB

Download
memory/3952-3-0x0000000002100000-0x0000000002106000-memory.dmp

Filesize
24KB

Download
memory/3952-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download