a6c0ac8eb97cb3dc1d97653736d754b81e0b3e11346ec492c7a9022820c2f1ce

Analysis

max time kernel
150s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
09-05-2024 15:03

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General

Target

2024-05-09_d9f741b7e058fdb36f39b4cd916b7844_cryptolocker.exe
Size

40KB
MD5

d9f741b7e058fdb36f39b4cd916b7844
SHA1

4c8bca248f6e133fe418cf13981b64298f471030
SHA256

a6c0ac8eb97cb3dc1d97653736d754b81e0b3e11346ec492c7a9022820c2f1ce
SHA512

61668c6f611ff2487812660a7bce12ebc708d4553d86b15614d97d6577a79c091c27b1196b63c282ee07f20e7a475c1d95cfa791082f270d142a64a0e125343c
SSDEEP

768:ba74zYcgT/EkdCQgpwXFXSqQXfj0xKc/j:ba6YcA/Xk3wXFXSqAJcr

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/4736-0-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00060000000232a4-13.dat	CryptoLocker_rule2
behavioral2/memory/4484-17-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4736-18-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4484-27-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/4736-0-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/files/0x00060000000232a4-13.dat	UPX
behavioral2/memory/4484-17-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/memory/4736-18-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/memory/4484-27-0x0000000008000000-0x000000000800F000-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-1-5-21-2804150937-2146708401-419095071-1000\Control Panel\International\Geo\Nation	2024-05-09_d9f741b7e058fdb36f39b4cd916b7844_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4484	hasfj.exe

UPX packed file 5 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/4736-0-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/files/0x00060000000232a4-13.dat	upx
behavioral2/memory/4484-17-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/memory/4736-18-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/memory/4484-27-0x0000000008000000-0x000000000800F000-memory.dmp	upx

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 4736 wrote to memory of 4484	4736	2024-05-09_d9f741b7e058fdb36f39b4cd916b7844_cryptolocker.exe	80
PID 4736 wrote to memory of 4484	4736	2024-05-09_d9f741b7e058fdb36f39b4cd916b7844_cryptolocker.exe	80
PID 4736 wrote to memory of 4484	4736	2024-05-09_d9f741b7e058fdb36f39b4cd916b7844_cryptolocker.exe	80

C:\Users\Admin\AppData\Local\Temp\2024-05-09_d9f741b7e058fdb36f39b4cd916b7844_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-09_d9f741b7e058fdb36f39b4cd916b7844_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4736
- C:\Users\Admin\AppData\Local\Temp\hasfj.exe
  "C:\Users\Admin\AppData\Local\Temp\hasfj.exe"
  2⤵
  - Executes dropped EXE
  PID:4484

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
41KB

MD5
22c056a9c5a0918eb89e2bcae1431b9d

SHA1
89a0ea1d891a02ef6de42d2a8207a381513f156e

SHA256
5b6a8bac456cd564d6163ca88c06267c8a38e975026981c83a704c44cd4e5f4b

SHA512
97a98e8942831c16a7ae86428b159100edc174906ec75492859c46694b2f6f54cb9d494dae9ecab536b21386945118d3bd1ad7d77b900ba7527c647763604972

Download Submit
memory/4484-17-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/4484-20-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download
memory/4484-26-0x0000000002120000-0x0000000002126000-memory.dmp

Filesize
24KB

Download
memory/4484-27-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/4736-0-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/4736-1-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/4736-2-0x0000000003150000-0x0000000003156000-memory.dmp

Filesize
24KB

Download
memory/4736-9-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/4736-18-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download