b0accfba01bbda2dc9133a92709520cf6c010c1f85a31acf7a51d335a3ec9873

Analysis

max time kernel
3s
max time network
81s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
25-01-2024 17:42

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General

Target

2024-01-25_13f5afe8395e6a1d9607764e2aa45107_cryptolocker.exe
Size

37KB
MD5

13f5afe8395e6a1d9607764e2aa45107
SHA1

a53936d1e8c799b692a944f8d4145c971db8c1dd
SHA256

b0accfba01bbda2dc9133a92709520cf6c010c1f85a31acf7a51d335a3ec9873
SHA512

54451792c1fae2c4f7349a89e0b915d68eb8d7aace21337da9abcd4821992411861936169d0b7e0f74f892e97836433d426e533481cb83872e2833d2197b6d5f
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzl6AJvDSuYlU7g:b/yC4GyNM01GuQMNXw2PSjHPbSuYlU7g

Score

9^/10

discovery

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

Processes:

resource	yara_rule
behavioral1/files/0x000b000000015df1-10.dat	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

Processes:

retln.exe

pid	Process
2020	retln.exe

Loads dropped DLL 1 IoCs

Processes:

2024-01-25_13f5afe8395e6a1d9607764e2aa45107_cryptolocker.exe

pid	Process
2912	2024-01-25_13f5afe8395e6a1d9607764e2aa45107_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

Processes:

2024-01-25_13f5afe8395e6a1d9607764e2aa45107_cryptolocker.exeretln.exe

pid	Process
2912	2024-01-25_13f5afe8395e6a1d9607764e2aa45107_cryptolocker.exe
2020	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

2024-01-25_13f5afe8395e6a1d9607764e2aa45107_cryptolocker.exe

description	pid	Process	procid_target
PID 2912 wrote to memory of 2020	2912	2024-01-25_13f5afe8395e6a1d9607764e2aa45107_cryptolocker.exe	28
PID 2912 wrote to memory of 2020	2912	2024-01-25_13f5afe8395e6a1d9607764e2aa45107_cryptolocker.exe	28
PID 2912 wrote to memory of 2020	2912	2024-01-25_13f5afe8395e6a1d9607764e2aa45107_cryptolocker.exe	28
PID 2912 wrote to memory of 2020	2912	2024-01-25_13f5afe8395e6a1d9607764e2aa45107_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-01-25_13f5afe8395e6a1d9607764e2aa45107_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-25_13f5afe8395e6a1d9607764e2aa45107_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2912
- 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:2020

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
37KB

MD5
e2a6507dc2ae3c83360b95bc0ea88c29

SHA1
b96a2574b05f746fdb566c7cd6d850c034fbfcd5

SHA256
177081cbca00cb7fdd3930807904de20df79f92b8adbacf44c215fa8ed89632c

SHA512
b1c1483465ee60ca0dd84312becc606aa8119065e3cf0d100930f7f612c7d53a221233d1b4a4f7c011abf671aa0d68248a50eabca9a9367156c4f6ef037bc6b8

Download Submit
memory/2020-18-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/2912-0-0x0000000001CE0000-0x0000000001CE6000-memory.dmp

Filesize
24KB

Download
memory/2912-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2912-8-0x0000000001CE0000-0x0000000001CE6000-memory.dmp

Filesize
24KB

Download