31ebe5ca646dc97c741a9fbdfc00c76188f9736d3416b23c76668be62bdcc7cd

Analysis

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

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
29/04/2024, 22:08

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-04-29_b7aee36fe1263e54025127668bccbf4a_cryptolocker.exe
Size

41KB
MD5

b7aee36fe1263e54025127668bccbf4a
SHA1

b1fa28fd856c7be7aeb9d34b519477c9e5404a1a
SHA256

31ebe5ca646dc97c741a9fbdfc00c76188f9736d3416b23c76668be62bdcc7cd
SHA512

05850e9069fb439b03824fdffe195f41d8c38d2a8a253cdacf04ef0ba9659a08c50b21b78353cf1e7569dc0c5a6eae7ee423cfc76dd3c39b63adfd88a3f4a14a
SSDEEP

768:bCDOw9UiaKHfjnD0S16avdrQFiLjJvtAXt:bCDOw9aMDooc+vAXt

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/3156-0-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000d000000023b99-13.dat	CryptoLocker_rule2
behavioral2/memory/3156-17-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4548-18-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4548-27-0x0000000008000000-0x000000000800A000-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-1-5-21-3411335054-1982420046-2118495756-1000\Control Panel\International\Geo\Nation	2024-04-29_b7aee36fe1263e54025127668bccbf4a_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4548	lossy.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 3156 wrote to memory of 4548	3156	2024-04-29_b7aee36fe1263e54025127668bccbf4a_cryptolocker.exe	84
PID 3156 wrote to memory of 4548	3156	2024-04-29_b7aee36fe1263e54025127668bccbf4a_cryptolocker.exe	84
PID 3156 wrote to memory of 4548	3156	2024-04-29_b7aee36fe1263e54025127668bccbf4a_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-04-29_b7aee36fe1263e54025127668bccbf4a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-29_b7aee36fe1263e54025127668bccbf4a_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3156
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:4548

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
41KB

MD5
b0238863bc82663610be532389a88b5d

SHA1
2b6daaed340e3893ba4f3991fcd185876496b6b5

SHA256
f91b7a0ebbb5e5abbf501c1c6be839856cc05f0443cf709f131b3eaa59d14e6c

SHA512
bf46629e389cb19d9f1a29cf437065630a635cf5179dcbd91cb1234ef6a571b4b4353947af70600b38c4abe09f09b7e5e67d524e26e6157def8b5077b515eacd

Download Submit
memory/3156-0-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/3156-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/3156-2-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/3156-9-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/3156-17-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/4548-18-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/4548-26-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/4548-20-0x0000000001FE0000-0x0000000001FE6000-memory.dmp

Filesize
24KB

Download
memory/4548-27-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download