681d15aa01e067817652eea5de0fecce1ab7871cf13af632f88dd702e89aee0f

Analysis

max time kernel
150s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
02/05/2024, 03:35

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General

Target

2024-05-02_670ccd3847578f3a40fe4ee7b5905559_cryptolocker.exe
Size

31KB
MD5

670ccd3847578f3a40fe4ee7b5905559
SHA1

552083134f0726f999d67b09339a0fc0aae75593
SHA256

681d15aa01e067817652eea5de0fecce1ab7871cf13af632f88dd702e89aee0f
SHA512

a5dca447bb63066912c394abf30fbd53bfdcde2e98772eecece0d0fc372fbec35e8b43627e7d73d3f66f1b7223da358f79224f6f275c596e2cfa042d202d519d
SSDEEP

384:bG74uGLLQRcsdeQ72ngEr4K7YmE8j60nrlwfjDUGTGO/:bG74zYcgT/Ekd0ryfjF

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/4536-0-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000c000000023b52-13.dat	CryptoLocker_rule2
behavioral2/memory/4536-17-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3096-18-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3096-26-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2

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-1-5-21-2818691465-3043947619-2475182763-1000\Control Panel\International\Geo\Nation	2024-05-02_670ccd3847578f3a40fe4ee7b5905559_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3096	hasfj.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 4536 wrote to memory of 3096	4536	2024-05-02_670ccd3847578f3a40fe4ee7b5905559_cryptolocker.exe	83
PID 4536 wrote to memory of 3096	4536	2024-05-02_670ccd3847578f3a40fe4ee7b5905559_cryptolocker.exe	83
PID 4536 wrote to memory of 3096	4536	2024-05-02_670ccd3847578f3a40fe4ee7b5905559_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-05-02_670ccd3847578f3a40fe4ee7b5905559_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-02_670ccd3847578f3a40fe4ee7b5905559_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4536
- C:\Users\Admin\AppData\Local\Temp\hasfj.exe
  "C:\Users\Admin\AppData\Local\Temp\hasfj.exe"
  2⤵
  - Executes dropped EXE
  PID:3096

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\hasfj.exe

Filesize
32KB

MD5
14b2e68b470568117809310fd0f9aeb0

SHA1
750b3d35c7a4f5e26f864530857da6f709059698

SHA256
831902f0ae2f04c0e2821079ad90302f77d4bdc76898fd945fb92779f2454272

SHA512
a08ad2567463628846de10ece1ddff39a51aa29b6cbf56b72e968e5a75026ab709809a4834136a9c026e3d2997fcf39e36557fec9f275183298b84208aaca8a8

Download Submit
memory/3096-18-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/3096-26-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/4536-0-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/4536-1-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/4536-2-0x0000000003150000-0x0000000003156000-memory.dmp

Filesize
24KB

Download
memory/4536-9-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/4536-17-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download