f19b343d5dd65609dc5f6f709e73fa04d0537d4172faa3f6e240faa311101bb0

Analysis

max time kernel
3s
max time network
82s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
07-03-2024 22:40

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General

Target

2024-03-07_d432529d0a395d96a1d09661d251cd2d_cryptolocker.exe
Size

33KB
MD5

d432529d0a395d96a1d09661d251cd2d
SHA1

8cdf70f955c80912e3a9c3ec88005157e46fe2eb
SHA256

f19b343d5dd65609dc5f6f709e73fa04d0537d4172faa3f6e240faa311101bb0
SHA512

30b5198c4bf04b6a2101966ec80cdec94377efab85daf7c88395d02582a6dd56fee616524ffcda7330727914b83df2317ad51b95e183caf12a0cf18462c239ce
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzl6A0MFNeGH:b/yC4GyNM01GuQMNXw2PSjH+VU

Score

9^/10

discovery

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x000b000000012256-10.dat	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
2336	retln.exe

Loads dropped DLL 1 IoCs

pid	Process
1460	2024-03-07_d432529d0a395d96a1d09661d251cd2d_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
1460	2024-03-07_d432529d0a395d96a1d09661d251cd2d_cryptolocker.exe
2336	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1460 wrote to memory of 2336	1460	2024-03-07_d432529d0a395d96a1d09661d251cd2d_cryptolocker.exe	28
PID 1460 wrote to memory of 2336	1460	2024-03-07_d432529d0a395d96a1d09661d251cd2d_cryptolocker.exe	28
PID 1460 wrote to memory of 2336	1460	2024-03-07_d432529d0a395d96a1d09661d251cd2d_cryptolocker.exe	28
PID 1460 wrote to memory of 2336	1460	2024-03-07_d432529d0a395d96a1d09661d251cd2d_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-03-07_d432529d0a395d96a1d09661d251cd2d_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-07_d432529d0a395d96a1d09661d251cd2d_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:1460
- 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:2336

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
33KB

MD5
6caa90e31205f52fc424ead958803977

SHA1
a333efab318ce4c4c712fdd5c3293b20915ac9b8

SHA256
73956de7dba5f821afe1a75e0fbde38fa291fe8a98dc13d4eb60c967cecce7d6

SHA512
56d079d83a6ee96169775d92cf2205dd3d2413f22987db36a985e202635428ab11ef8e782f6ccb9bedd6fece7ecb3337bffe933ab73073169f549c3bac2587e5

Download Submit
memory/1460-0-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/1460-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1460-8-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/2336-18-0x0000000000300000-0x0000000000306000-memory.dmp

Filesize
24KB

Download