95c5df28ba67d1c7a8d8dbb8dbb022b69c1b95f31ea74f8568870ccdad4f883d

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
12/02/2024, 10:06

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General

Target

2024-02-12_ac4f14f7a988d9c3ea642eec08dbab9e_cryptolocker.exe
Size

51KB
MD5

ac4f14f7a988d9c3ea642eec08dbab9e
SHA1

4fd790c86155b372333f4f1d2cdd82a59a919e45
SHA256

95c5df28ba67d1c7a8d8dbb8dbb022b69c1b95f31ea74f8568870ccdad4f883d
SHA512

68a943642482fcfcd457e764875bf3227fe924a5d2869dc792d10457e3282235723a8aeccc91949f2131b9c5a8e44aca710c08200b6dd583e7a51202bb3a00f7
SSDEEP

768:79inqyNR/QtOOtEvwDpjBK/rJ+Nw8qn8pKIR9p:79mqyNhQMOtEvwDpjBxe8TpXRr

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4172-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00070000000231f5-13.dat	CryptoLocker_rule2
behavioral2/memory/4172-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4708-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4172-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00070000000231f5-13.dat	CryptoLocker_set1
behavioral2/memory/4172-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4708-18-0x0000000000500000-0x000000000050F000-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-1-5-21-1168293393-3419776239-306423207-1000\Control Panel\International\Geo\Nation	2024-02-12_ac4f14f7a988d9c3ea642eec08dbab9e_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4708	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 4172 wrote to memory of 4708	4172	2024-02-12_ac4f14f7a988d9c3ea642eec08dbab9e_cryptolocker.exe	83
PID 4172 wrote to memory of 4708	4172	2024-02-12_ac4f14f7a988d9c3ea642eec08dbab9e_cryptolocker.exe	83
PID 4172 wrote to memory of 4708	4172	2024-02-12_ac4f14f7a988d9c3ea642eec08dbab9e_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-02-12_ac4f14f7a988d9c3ea642eec08dbab9e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-12_ac4f14f7a988d9c3ea642eec08dbab9e_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4172
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4708

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
51KB

MD5
cb7129f7fae294796af696d5a68eb8c3

SHA1
19624fa240dbe1ab777c71d8ada753047e4d9395

SHA256
da0d9e79243aa81a3cab638ec7cb760f1bca407d94b58271d1a9ec1ab89ad9fa

SHA512
c41e2811cc5276f325c60e572a9b716271bf6066e418001663c99c8a1e4709994c7a1cd7865bde44ceefed3111f57655e0ced3651341445f042238c8895e33f3

Download Submit
memory/4172-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4172-1-0x00000000007C0000-0x00000000007C6000-memory.dmp

Filesize
24KB

Download
memory/4172-2-0x00000000007C0000-0x00000000007C6000-memory.dmp

Filesize
24KB

Download
memory/4172-3-0x00000000007E0000-0x00000000007E6000-memory.dmp

Filesize
24KB

Download
memory/4172-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4708-18-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4708-20-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/4708-26-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download