157c9fcf0777cc4e60bd212bb999515ccb0aa916f78aa744543459513c4bad97

Analysis

max time kernel
13s
max time network
120s
platform
windows7_x64
resource
win7-20240419-en
resource tags

arch:x64arch:x86image:win7-20240419-enlocale:en-usos:windows7-x64system
submitted
30/04/2024, 17:28

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General

Target

2024-04-30_9e8c9c15840dba312d3ce09bb9de9936_cryptolocker.exe
Size

34KB
MD5

9e8c9c15840dba312d3ce09bb9de9936
SHA1

5f59d645be5f9c64aa84d8a22c5f18d80e4e75ab
SHA256

157c9fcf0777cc4e60bd212bb999515ccb0aa916f78aa744543459513c4bad97
SHA512

703e2d1c20df435fde1e188775e4c64de8c495e0e95196ff523c3d22049f0be80d001eb1541c456ed7f7c91d444218ca1ca45be842c9c3808d33203339c2e569
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzl6A0MFNeGQn:b/yC4GyNM01GuQMNXw2PSjH+VGQn

Score

9^/10

discovery

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x000c000000012279-10.dat	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
2056	retln.exe

Loads dropped DLL 1 IoCs

pid	Process
992	2024-04-30_9e8c9c15840dba312d3ce09bb9de9936_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
992	2024-04-30_9e8c9c15840dba312d3ce09bb9de9936_cryptolocker.exe
2056	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 992 wrote to memory of 2056	992	2024-04-30_9e8c9c15840dba312d3ce09bb9de9936_cryptolocker.exe	28
PID 992 wrote to memory of 2056	992	2024-04-30_9e8c9c15840dba312d3ce09bb9de9936_cryptolocker.exe	28
PID 992 wrote to memory of 2056	992	2024-04-30_9e8c9c15840dba312d3ce09bb9de9936_cryptolocker.exe	28
PID 992 wrote to memory of 2056	992	2024-04-30_9e8c9c15840dba312d3ce09bb9de9936_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-30_9e8c9c15840dba312d3ce09bb9de9936_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-30_9e8c9c15840dba312d3ce09bb9de9936_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:992
- 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:2056

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
34KB

MD5
2e3120757ae33f0dbe43e5cbd7436abb

SHA1
55d786adab6fac61c5048cbe13d26902f1752d4c

SHA256
89237efa7c5a3f25a1b5422e579ec14fdd307b2858589f513f00cf6b6f69fe09

SHA512
0b00754c38d3bc79ebe2aee9f0db0d70ad17f07ad4a617f980d80ed264ce3f62080844419c970862f53e411edd697a0a2dadc1cbf4787ddda1c9f806d87a352e

Download Submit
memory/992-0-0x00000000003E0000-0x00000000003E6000-memory.dmp

Filesize
24KB

Download
memory/992-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/992-7-0x00000000003E0000-0x00000000003E6000-memory.dmp

Filesize
24KB

Download
memory/2056-23-0x0000000000310000-0x0000000000316000-memory.dmp

Filesize
24KB

Download