49d7065c346cfe1d354361772d18e271857d09dd0157bda90f286c8b177e538d

Analysis

max time kernel
150s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
24/04/2024, 10:33

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-04-24_b5e092421d1d5e67bc21624a5a8c0a6c_cryptolocker.exe
Size

50KB
MD5

b5e092421d1d5e67bc21624a5a8c0a6c
SHA1

a4b0c95d0bb98a65479245f42ac414904a309826
SHA256

49d7065c346cfe1d354361772d18e271857d09dd0157bda90f286c8b177e538d
SHA512

36cc2a1c0123449a0badeb7e031c12bc5706e831acf505d2af7d6f822a15b317313672cc4fc5bc55e86062309da72f1c4ddde25c936005a38b691060b51774c4
SSDEEP

768:bODOw9UiamWUB2preAr+OfjH/0S16avdrQFiLjJvtl:bODOw9acifAoc+vl

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2212-0-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000300000001e97a-13.dat	CryptoLocker_rule2
behavioral2/memory/2212-17-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3076-26-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2212-0-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/files/0x000300000001e97a-13.dat	UPX
behavioral2/memory/2212-17-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/memory/3076-26-0x0000000008000000-0x000000000800F000-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-1-5-21-2288054676-1871194608-3559553667-1000\Control Panel\International\Geo\Nation	2024-04-24_b5e092421d1d5e67bc21624a5a8c0a6c_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3076	lossy.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2212-0-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/files/0x000300000001e97a-13.dat	upx
behavioral2/memory/2212-17-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/memory/3076-26-0x0000000008000000-0x000000000800F000-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 2212 wrote to memory of 3076	2212	2024-04-24_b5e092421d1d5e67bc21624a5a8c0a6c_cryptolocker.exe	85
PID 2212 wrote to memory of 3076	2212	2024-04-24_b5e092421d1d5e67bc21624a5a8c0a6c_cryptolocker.exe	85
PID 2212 wrote to memory of 3076	2212	2024-04-24_b5e092421d1d5e67bc21624a5a8c0a6c_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-04-24_b5e092421d1d5e67bc21624a5a8c0a6c_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-24_b5e092421d1d5e67bc21624a5a8c0a6c_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2212
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:3076

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\lossy.exe

Filesize
50KB

MD5
69c82b8b09a78a7ab6add62e75d317cb

SHA1
f28ed40d35e9e88781e32c54c5f290cfcd2de370

SHA256
89019ecd0e027f14416af0c6a9c9c1ae0c4b81642bf4499b99b851c430be3ba8

SHA512
d2d61564bfe7b2b45299d7fbae34ff51df695d38b751cedb5bd951cea298a3959740229241fca84f7ca31be5936381b66b806996e020df9ac5d1d682c4787ab7

Download Submit
memory/2212-0-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/2212-1-0x00000000021C0000-0x00000000021C6000-memory.dmp

Filesize
24KB

Download
memory/2212-2-0x00000000021C0000-0x00000000021C6000-memory.dmp

Filesize
24KB

Download
memory/2212-3-0x0000000002030000-0x0000000002036000-memory.dmp

Filesize
24KB

Download
memory/2212-17-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/3076-21-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/3076-19-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/3076-26-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download