951b71c5ed667c15c5ffeb48dcf469f48535d3320e46268b870eeac495412a49

Analysis

max time kernel
12s
max time network
122s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
08/03/2024, 09:57

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General

Target

2024-03-08_fcfe208945f16ffabb69d9db22a101a9_cryptolocker.exe
Size

32KB
MD5

fcfe208945f16ffabb69d9db22a101a9
SHA1

6630a17d8915aa799d2a460460f4d4cabe8e7cba
SHA256

951b71c5ed667c15c5ffeb48dcf469f48535d3320e46268b870eeac495412a49
SHA512

f4e47641f694512a42e6a10000f47de7326d2506520ef2e42d6fe0fef42d26cc2cbbf130fb8e121e600ea9b63a3c739d4aa5d74ca5ad2c2e797180ee791cbae5
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznUssoC:b/yC4GyNM01GuQMNXw2PSjWoC

Score

9^/10

discovery

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x000b00000001224c-10.dat	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
1740	retln.exe

Loads dropped DLL 1 IoCs

pid	Process
1252	2024-03-08_fcfe208945f16ffabb69d9db22a101a9_cryptolocker.exe

Creates a large amount of network flows 1 TTPs
This may indicate a network scan to discover remotely running services.
discovery

Network Service Discovery
T1046
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of UnmapMainImage 2 IoCs

pid	Process
1252	2024-03-08_fcfe208945f16ffabb69d9db22a101a9_cryptolocker.exe
1740	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1252 wrote to memory of 1740	1252	2024-03-08_fcfe208945f16ffabb69d9db22a101a9_cryptolocker.exe	28
PID 1252 wrote to memory of 1740	1252	2024-03-08_fcfe208945f16ffabb69d9db22a101a9_cryptolocker.exe	28
PID 1252 wrote to memory of 1740	1252	2024-03-08_fcfe208945f16ffabb69d9db22a101a9_cryptolocker.exe	28
PID 1252 wrote to memory of 1740	1252	2024-03-08_fcfe208945f16ffabb69d9db22a101a9_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-03-08_fcfe208945f16ffabb69d9db22a101a9_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-08_fcfe208945f16ffabb69d9db22a101a9_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:1252
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of UnmapMainImage
  PID:1740

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

T1046

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
32KB

MD5
605953c613af827f118425b2632a563e

SHA1
e062d8ae71b7234615232573acc4d3537d466199

SHA256
ad35c136de5f2d82442cdac7af8670dd1d926e837b3f50bc0e29e1323f1226cb

SHA512
3e3f4c6810dec7fad3b060e545db8eeed9883b0e5c4e6e263c4e7cc18b6eee2914c5d010139de618da3441d76e0f09698524e6bf488bd7a82751c5e051e5272c

Download Submit
memory/1252-0-0x0000000000330000-0x0000000000336000-memory.dmp

Filesize
24KB

Download
memory/1252-2-0x0000000000330000-0x0000000000336000-memory.dmp

Filesize
24KB

Download
memory/1252-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1740-16-0x0000000000370000-0x0000000000376000-memory.dmp

Filesize
24KB

Download