56ba6e33d786a2b5044ecd53999cce04e9580570401fa9ab9f4c55ba2836b4fa

Analysis

max time kernel
150s
max time network
150s
platform
windows7_x64
resource
win7-20240215-en
resource tags

arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system
submitted
10-05-2024 04:50

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General

Target

2024-05-10_b88e9eca4cdf60e85b033511c54fb2f1_cryptolocker.exe
Size

41KB
MD5

b88e9eca4cdf60e85b033511c54fb2f1
SHA1

a5a6de1ac54e9fca509af4136c1cd7606e030771
SHA256

56ba6e33d786a2b5044ecd53999cce04e9580570401fa9ab9f4c55ba2836b4fa
SHA512

474f143bb5f2d7a219ebcc533cad7002b6cd55619fcda4ae3dcccd4635770d615552b18347f957ba8917a7770e23aa7053eb5eb3d1a6b485973d6f77f1207857
SSDEEP

768:bCDOw9UiaKHfjnD0S16avdrQFiLjJvtAo:bCDOw9aMDooc+vAo

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral1/memory/1924-0-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b000000015cbd-11.dat	CryptoLocker_rule2
behavioral1/memory/1924-15-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3020-24-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
3020	lossy.exe

Loads dropped DLL 1 IoCs

pid	Process
1924	2024-05-10_b88e9eca4cdf60e85b033511c54fb2f1_cryptolocker.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1924 wrote to memory of 3020	1924	2024-05-10_b88e9eca4cdf60e85b033511c54fb2f1_cryptolocker.exe	28
PID 1924 wrote to memory of 3020	1924	2024-05-10_b88e9eca4cdf60e85b033511c54fb2f1_cryptolocker.exe	28
PID 1924 wrote to memory of 3020	1924	2024-05-10_b88e9eca4cdf60e85b033511c54fb2f1_cryptolocker.exe	28
PID 1924 wrote to memory of 3020	1924	2024-05-10_b88e9eca4cdf60e85b033511c54fb2f1_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-10_b88e9eca4cdf60e85b033511c54fb2f1_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-10_b88e9eca4cdf60e85b033511c54fb2f1_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1924
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:3020

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
41KB

MD5
a9882efbe2ef6b8d398007e9f6de5558

SHA1
f5b17b2a01f4bc6eeff60a265145de8f6c20133f

SHA256
78a75b0a5362d48f5f97f75af540a08c4eaab8544f4f0430577646bd159ad36f

SHA512
bdd55fe84ad4bcf414e1561778f62b5d78393dc1690e2225007ef675b430fc5c2cc08e82ed2dabd9536d766a5263e45c1aefd15cecb590b173ab53b889c24139

Download Submit
memory/1924-0-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/1924-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1924-2-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1924-3-0x0000000000300000-0x0000000000306000-memory.dmp

Filesize
24KB

Download
memory/1924-15-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/3020-17-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/3020-24-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download