16143f5b559d44350d9477f8a801f4649ee7ca9f77d6763e91db90d1ab049fbb

Analysis

max time kernel
150s
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
06/04/2024, 03:31

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General

Target

2024-04-06_25d714b8f62492901d1039874cbb6269_cryptolocker.exe
Size

31KB
MD5

25d714b8f62492901d1039874cbb6269
SHA1

c79969c2e039305561742f9c887fe8aad42c3a22
SHA256

16143f5b559d44350d9477f8a801f4649ee7ca9f77d6763e91db90d1ab049fbb
SHA512

0c4f925d11896453c325c02488ecfd0e2a81c00bd5b2d201350ceb0b9569a2a5801f6a421d29c1b178d688252f8ea1ebd4c013af1155001ac14317d94d1f3699
SSDEEP

768:bFPm5zusFUB2preAr+Ofjg0S16avdrQFiLjJvtC:bFPmpiif/oc+vC

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/1896-0-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000700000002322d-13.dat	CryptoLocker_rule2
behavioral2/memory/860-17-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1896-18-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/860-27-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/1896-0-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/files/0x000700000002322d-13.dat	UPX
behavioral2/memory/860-17-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/memory/1896-18-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/memory/860-27-0x0000000008000000-0x000000000800E000-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-1-5-21-557049126-2506969350-2798870634-1000\Control Panel\International\Geo\Nation	2024-04-06_25d714b8f62492901d1039874cbb6269_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
860	lossy.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1896-0-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/files/0x000700000002322d-13.dat	upx
behavioral2/memory/860-17-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/memory/1896-18-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/memory/860-27-0x0000000008000000-0x000000000800E000-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 1896 wrote to memory of 860	1896	2024-04-06_25d714b8f62492901d1039874cbb6269_cryptolocker.exe	88
PID 1896 wrote to memory of 860	1896	2024-04-06_25d714b8f62492901d1039874cbb6269_cryptolocker.exe	88
PID 1896 wrote to memory of 860	1896	2024-04-06_25d714b8f62492901d1039874cbb6269_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-04-06_25d714b8f62492901d1039874cbb6269_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-06_25d714b8f62492901d1039874cbb6269_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1896
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:860

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
32KB

MD5
2f4e3130569e6db499d8fa0d213ebca9

SHA1
cf7416ec90900ac29e87a95e884718bb2c560c45

SHA256
187339a13f083aa2dbe3614d633c2c24be52092adfadc50f51264c21bcfd51e0

SHA512
30b370ff3004bf6319d0b9e348a4654aa577ce714fb3c078d6a25e1989b477525296fc8282de61c9e82f9dcccc6fa78884cb3d4df8cbae22c85be58afe3288d2

Download Submit
memory/860-17-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/860-20-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/860-24-0x0000000000590000-0x0000000000596000-memory.dmp

Filesize
24KB

Download
memory/860-27-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/1896-0-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/1896-1-0x00000000021B0000-0x00000000021B6000-memory.dmp

Filesize
24KB

Download
memory/1896-2-0x00000000021B0000-0x00000000021B6000-memory.dmp

Filesize
24KB

Download
memory/1896-3-0x0000000002030000-0x0000000002036000-memory.dmp

Filesize
24KB

Download
memory/1896-18-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download