a841eed2be354673415281e89c701762051539776aba1dae154b96c53cbb6cba

Analysis

max time kernel
149s
max time network
150s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
24/05/2024, 02:23

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General

Target

2024-05-24_00a4289fa77d887cd6f8efc2b75e3f4b_cryptolocker.exe
Size

43KB
MD5

00a4289fa77d887cd6f8efc2b75e3f4b
SHA1

2e646806f2ad7d6778a654219cf125d5ca3a0614
SHA256

a841eed2be354673415281e89c701762051539776aba1dae154b96c53cbb6cba
SHA512

991d61d784a7d6ead3fb36785bdda0892c7c9da7927fd2cd1b04d14a14d207982ccaa28cf3850b7fbcea25780908aa26c1dd87fd9a588bd691e870ab79a97d02
SSDEEP

768:bCDOw9UiaKHfjnD0S16avdrQFiLjJvtAydv:bCDOw9aMDooc+vAyt

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/1384-0-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b000000012272-11.dat	CryptoLocker_rule2
behavioral1/memory/2372-16-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1384-15-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2372-26-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
2372	lossy.exe

Loads dropped DLL 1 IoCs

pid	Process
1384	2024-05-24_00a4289fa77d887cd6f8efc2b75e3f4b_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 1384 wrote to memory of 2372	1384	2024-05-24_00a4289fa77d887cd6f8efc2b75e3f4b_cryptolocker.exe	28
PID 1384 wrote to memory of 2372	1384	2024-05-24_00a4289fa77d887cd6f8efc2b75e3f4b_cryptolocker.exe	28
PID 1384 wrote to memory of 2372	1384	2024-05-24_00a4289fa77d887cd6f8efc2b75e3f4b_cryptolocker.exe	28
PID 1384 wrote to memory of 2372	1384	2024-05-24_00a4289fa77d887cd6f8efc2b75e3f4b_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-24_00a4289fa77d887cd6f8efc2b75e3f4b_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-24_00a4289fa77d887cd6f8efc2b75e3f4b_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1384
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:2372

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

Replay Monitor

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Downloads

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

Filesize
43KB

MD5
5bbbce4290adcaccb9b2caefd729736b

SHA1
eadbb6959394871c86769366169fe6b36e42a1d3

SHA256
1e1168c15d02b7dc6994299f696370b049baaf25cc052b624a806038504b9752

SHA512
f8ef8a036e6f5951cb3dcae9e6f0e0a042b5adaed6a76d8cfc892c46a1c8ed1d6cd5a2d224812ae56f29f99b648871cebd0a07812ce96b96c9cdcd60bceff36c

Download Submit
memory/1384-0-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/1384-1-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/1384-9-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/1384-2-0x0000000000210000-0x0000000000216000-memory.dmp

Filesize
24KB

Download
memory/1384-15-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/2372-16-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/2372-18-0x00000000006F0000-0x00000000006F6000-memory.dmp

Filesize
24KB

Download
memory/2372-25-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2372-26-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download