c62fbac09fd71f39a8f4b7cb158545db53f8deea18c11d1d71f1e8867d012a65

Analysis

max time kernel
150s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
29-05-2024 16:43

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General

Target

2024-05-29_cdab87ad571fe407eda2e2fe986b1443_cryptolocker.exe
Size

53KB
MD5

cdab87ad571fe407eda2e2fe986b1443
SHA1

94c2ff84a6806be48e9ffc65853b3d018838a15a
SHA256

c62fbac09fd71f39a8f4b7cb158545db53f8deea18c11d1d71f1e8867d012a65
SHA512

612e2b581a2b8e831d01e3dd1510562931027c7606a2b534a6fb361b882578cfda2bf976fb7cff6d725085b32eead44864381c6358a179a9900dcae72537652c
SSDEEP

768:bODOw9UiamWUB2preAr+OfjH/0S16avdrQFiLjJvtOXr:bODOw9acifAoc+vw

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/2328-0-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000700000002328e-13.dat	CryptoLocker_rule2
behavioral2/memory/2328-17-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2996-18-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2996-27-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/2328-0-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/files/0x000700000002328e-13.dat	UPX
behavioral2/memory/2328-17-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/memory/2996-18-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/memory/2996-27-0x0000000008000000-0x000000000800F000-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-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-05-29_cdab87ad571fe407eda2e2fe986b1443_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2996	lossy.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2328-0-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/files/0x000700000002328e-13.dat	upx
behavioral2/memory/2328-17-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/memory/2996-18-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/memory/2996-27-0x0000000008000000-0x000000000800F000-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 2328 wrote to memory of 2996	2328	2024-05-29_cdab87ad571fe407eda2e2fe986b1443_cryptolocker.exe	83
PID 2328 wrote to memory of 2996	2328	2024-05-29_cdab87ad571fe407eda2e2fe986b1443_cryptolocker.exe	83
PID 2328 wrote to memory of 2996	2328	2024-05-29_cdab87ad571fe407eda2e2fe986b1443_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-05-29_cdab87ad571fe407eda2e2fe986b1443_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-29_cdab87ad571fe407eda2e2fe986b1443_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2328
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:2996

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\lossy.exe

Filesize
53KB

MD5
b3ba252a258f63149217dfd001e6faec

SHA1
d4f4ec4b79c1df7093d63d0648c75e69fad9f616

SHA256
cedebb9be7d00e63cf60355427157a1ddf90c9a2d81716d6f342cfb838629693

SHA512
fb2e94013d7129b6a3f9a64062aa0b78ea3c8dcd58e2f17582e52970905419062572da8c089c281e955d732ad8386b51760b7defe6157b7035fd609186e1ffa7

Download Submit
memory/2328-0-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/2328-1-0x0000000002040000-0x0000000002046000-memory.dmp

Filesize
24KB

Download
memory/2328-2-0x0000000002060000-0x0000000002066000-memory.dmp

Filesize
24KB

Download
memory/2328-9-0x0000000002040000-0x0000000002046000-memory.dmp

Filesize
24KB

Download
memory/2328-17-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/2996-20-0x0000000001F30000-0x0000000001F36000-memory.dmp

Filesize
24KB

Download
memory/2996-18-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/2996-26-0x0000000001F00000-0x0000000001F06000-memory.dmp

Filesize
24KB

Download
memory/2996-27-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download