9259836c45851a9d33089eb7aa3608e5b7ff854e096fda71fd904098283c6b16

Analysis

max time kernel
3s
max time network
71s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
19/03/2024, 20:42

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General

Target

2024-03-19_03536215f3a82169420d9e5ba8ebfcc4_cryptolocker.exe
Size

35KB
MD5

03536215f3a82169420d9e5ba8ebfcc4
SHA1

a8a541a3a9af85aee86555689e32e522b1b33a1f
SHA256

9259836c45851a9d33089eb7aa3608e5b7ff854e096fda71fd904098283c6b16
SHA512

f0faf33753dda3f1770b5a73ab9c88dae05910024bfc2023549bbb94fd6577bc139e83edb459269337eaf6c0b5f2ff53ffcb809ee3decd4190838d74080be43c
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSzn1KkZQYFxh4:b/yC4GyNM01GuQMNXw2PSj1POah4

Score

9^/10

discovery

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x0009000000014120-10.dat	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
3000	retln.exe

Loads dropped DLL 1 IoCs

pid	Process
2380	2024-03-19_03536215f3a82169420d9e5ba8ebfcc4_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
2380	2024-03-19_03536215f3a82169420d9e5ba8ebfcc4_cryptolocker.exe
3000	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2380 wrote to memory of 3000	2380	2024-03-19_03536215f3a82169420d9e5ba8ebfcc4_cryptolocker.exe	28
PID 2380 wrote to memory of 3000	2380	2024-03-19_03536215f3a82169420d9e5ba8ebfcc4_cryptolocker.exe	28
PID 2380 wrote to memory of 3000	2380	2024-03-19_03536215f3a82169420d9e5ba8ebfcc4_cryptolocker.exe	28
PID 2380 wrote to memory of 3000	2380	2024-03-19_03536215f3a82169420d9e5ba8ebfcc4_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-03-19_03536215f3a82169420d9e5ba8ebfcc4_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-19_03536215f3a82169420d9e5ba8ebfcc4_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2380
- 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:3000

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
36KB

MD5
9221af77af562e6fd135366c34fd0b01

SHA1
c4a02b5215fb21e9b204d982e25d019ed836cf6c

SHA256
dc9f17ef1a3ce26bf42eefaa4f0d4f63f9f00eb11bc755b5234183d2f32b77b0

SHA512
d310af99e6e2ea04e0f1b60390fdaa72f61ec3fef7d9ceb3b572480dfb276308fba921d467ddf84bfad2cac11b2e23ccf41090c0bba41a8249d52df8fcf76d40

Download Submit
memory/2380-0-0x00000000003B0000-0x00000000003B6000-memory.dmp

Filesize
24KB

Download
memory/2380-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2380-8-0x00000000003B0000-0x00000000003B6000-memory.dmp

Filesize
24KB

Download
memory/3000-23-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download