djvu | 4a7bc46227627241e9b1a8c09aa9929fc428e83bee584425d64374a8e14ef097

Analysis

max time kernel
144s
max time network
123s
platform
windows11-21h2_x64
resource
win11-20240508-en
resource tags

arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
submitted
26/05/2024, 21:40

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
4a7bc46227627241e9b1a8c09aa9929fc428e83bee584425d64374a8e14ef097.exe
Size 758KB
Sample240526-1jppfadh43
SHA256 4a7bc46227627241e9b1a8c09aa9929fc428e83bee584425d64374a8e14ef097
MD5 8694728a91d75f0499ec50f3a5069c92
SHA1 fa746ac0033bf4902c1967c90d54b9d38dade8e5
SHA512 e87a4b5b1ed8f9b23fabab2cac197755af2e94501e91bb180b3693184f06c86a80779ec24041195cebb59733f9f38aca3dee0a1c5a2f8856b0b32c7c700a5242
SSDEEP 12288:WwMZHx36OiVm0624CW0MVZzJ2EECuJ4VwIQUSe/0PWX2Ceia:WwSXGmBkeNvuawIQUpOEa
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

http://cajgtus.com/test1/get.php

Attributes

extension
.vepi
offline_id
EGfa5svnSGFJka7LZBQoqff0QtO1IpTauoDvGvt1
payload_url
http://sdfjhuz.com/dl/build2.exe

http://cajgtus.com/files/1/build3.exe
ransomnote
ATTENTION! Don't worry, you can return all your files! All your files like pictures, databases, documents and other important are encrypted with strongest encryption and unique key. The only method of recovering files is to purchase decrypt tool and unique key for you. This software will decrypt all your encrypted files. What guarantees you have? You can send one of your encrypted file from your PC and we decrypt it for free. But we can decrypt only 1 file for free. File must not contain valuable information. Do not ask assistants from youtube and recovery data sites for help in recovering your data. They can use your free decryption quota and scam you. Our contact is emails in this text document only. You can get and look video overview decrypt tool: https://wetransfer.com/downloads/33b490a613f49fa190924f199d2c079e20240512191214/caaf73 Price of private key and decrypt software is $999. Discount 50% available if you contact us first 72 hours, that's price for you is $499. Please note that you'll never restore your data without payment. Check your e-mail "Spam" or "Junk" folder if you don't get answer more than 6 hours. To get this software you need write on our e-mail: [email protected] Reserve e-mail address to contact us: [email protected] Your personal ID: 0871PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 15 IoCs

resource	yara_rule
behavioral2/memory/2756-2-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2756-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2756-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/720-5-0x0000000004AC0000-0x0000000004BDB000-memory.dmp	family_djvu
behavioral2/memory/2756-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2756-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2828-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2828-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2828-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2828-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2828-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2828-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2828-39-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2828-40-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2828-41-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
4696	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1672260578-815027929-964132517-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\381d408c-75ab-4f75-806e-1ba1100d9466\\4a7bc46227627241e9b1a8c09aa9929fc428e83bee584425d64374a8e14ef097.exe\" --AutoStart"	4a7bc46227627241e9b1a8c09aa9929fc428e83bee584425d64374a8e14ef097.exe

Looks up external IP address via web service 3 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
2	api.2ip.ua
8	api.2ip.ua
1	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 720 set thread context of 2756	720	4a7bc46227627241e9b1a8c09aa9929fc428e83bee584425d64374a8e14ef097.exe	80
PID 3096 set thread context of 2828	3096	4a7bc46227627241e9b1a8c09aa9929fc428e83bee584425d64374a8e14ef097.exe	85

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2756	4a7bc46227627241e9b1a8c09aa9929fc428e83bee584425d64374a8e14ef097.exe
2756	4a7bc46227627241e9b1a8c09aa9929fc428e83bee584425d64374a8e14ef097.exe
2828	4a7bc46227627241e9b1a8c09aa9929fc428e83bee584425d64374a8e14ef097.exe
2828	4a7bc46227627241e9b1a8c09aa9929fc428e83bee584425d64374a8e14ef097.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 720 wrote to memory of 2756	720	4a7bc46227627241e9b1a8c09aa9929fc428e83bee584425d64374a8e14ef097.exe	80
PID 720 wrote to memory of 2756	720	4a7bc46227627241e9b1a8c09aa9929fc428e83bee584425d64374a8e14ef097.exe	80
PID 720 wrote to memory of 2756	720	4a7bc46227627241e9b1a8c09aa9929fc428e83bee584425d64374a8e14ef097.exe	80
PID 720 wrote to memory of 2756	720	4a7bc46227627241e9b1a8c09aa9929fc428e83bee584425d64374a8e14ef097.exe	80
PID 720 wrote to memory of 2756	720	4a7bc46227627241e9b1a8c09aa9929fc428e83bee584425d64374a8e14ef097.exe	80
PID 720 wrote to memory of 2756	720	4a7bc46227627241e9b1a8c09aa9929fc428e83bee584425d64374a8e14ef097.exe	80
PID 720 wrote to memory of 2756	720	4a7bc46227627241e9b1a8c09aa9929fc428e83bee584425d64374a8e14ef097.exe	80
PID 720 wrote to memory of 2756	720	4a7bc46227627241e9b1a8c09aa9929fc428e83bee584425d64374a8e14ef097.exe	80
PID 720 wrote to memory of 2756	720	4a7bc46227627241e9b1a8c09aa9929fc428e83bee584425d64374a8e14ef097.exe	80
PID 720 wrote to memory of 2756	720	4a7bc46227627241e9b1a8c09aa9929fc428e83bee584425d64374a8e14ef097.exe	80
PID 2756 wrote to memory of 4696	2756	4a7bc46227627241e9b1a8c09aa9929fc428e83bee584425d64374a8e14ef097.exe	81
PID 2756 wrote to memory of 4696	2756	4a7bc46227627241e9b1a8c09aa9929fc428e83bee584425d64374a8e14ef097.exe	81
PID 2756 wrote to memory of 4696	2756	4a7bc46227627241e9b1a8c09aa9929fc428e83bee584425d64374a8e14ef097.exe	81
PID 2756 wrote to memory of 3096	2756	4a7bc46227627241e9b1a8c09aa9929fc428e83bee584425d64374a8e14ef097.exe	82
PID 2756 wrote to memory of 3096	2756	4a7bc46227627241e9b1a8c09aa9929fc428e83bee584425d64374a8e14ef097.exe	82
PID 2756 wrote to memory of 3096	2756	4a7bc46227627241e9b1a8c09aa9929fc428e83bee584425d64374a8e14ef097.exe	82
PID 3096 wrote to memory of 2828	3096	4a7bc46227627241e9b1a8c09aa9929fc428e83bee584425d64374a8e14ef097.exe	85
PID 3096 wrote to memory of 2828	3096	4a7bc46227627241e9b1a8c09aa9929fc428e83bee584425d64374a8e14ef097.exe	85
PID 3096 wrote to memory of 2828	3096	4a7bc46227627241e9b1a8c09aa9929fc428e83bee584425d64374a8e14ef097.exe	85
PID 3096 wrote to memory of 2828	3096	4a7bc46227627241e9b1a8c09aa9929fc428e83bee584425d64374a8e14ef097.exe	85
PID 3096 wrote to memory of 2828	3096	4a7bc46227627241e9b1a8c09aa9929fc428e83bee584425d64374a8e14ef097.exe	85
PID 3096 wrote to memory of 2828	3096	4a7bc46227627241e9b1a8c09aa9929fc428e83bee584425d64374a8e14ef097.exe	85
PID 3096 wrote to memory of 2828	3096	4a7bc46227627241e9b1a8c09aa9929fc428e83bee584425d64374a8e14ef097.exe	85
PID 3096 wrote to memory of 2828	3096	4a7bc46227627241e9b1a8c09aa9929fc428e83bee584425d64374a8e14ef097.exe	85
PID 3096 wrote to memory of 2828	3096	4a7bc46227627241e9b1a8c09aa9929fc428e83bee584425d64374a8e14ef097.exe	85
PID 3096 wrote to memory of 2828	3096	4a7bc46227627241e9b1a8c09aa9929fc428e83bee584425d64374a8e14ef097.exe	85

C:\Users\Admin\AppData\Local\Temp\4a7bc46227627241e9b1a8c09aa9929fc428e83bee584425d64374a8e14ef097.exe
"C:\Users\Admin\AppData\Local\Temp\4a7bc46227627241e9b1a8c09aa9929fc428e83bee584425d64374a8e14ef097.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:720
- C:\Users\Admin\AppData\Local\Temp\4a7bc46227627241e9b1a8c09aa9929fc428e83bee584425d64374a8e14ef097.exe
  "C:\Users\Admin\AppData\Local\Temp\4a7bc46227627241e9b1a8c09aa9929fc428e83bee584425d64374a8e14ef097.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2756
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\381d408c-75ab-4f75-806e-1ba1100d9466" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:4696
- - C:\Users\Admin\AppData\Local\Temp\4a7bc46227627241e9b1a8c09aa9929fc428e83bee584425d64374a8e14ef097.exe
    "C:\Users\Admin\AppData\Local\Temp\4a7bc46227627241e9b1a8c09aa9929fc428e83bee584425d64374a8e14ef097.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:3096
  - - C:\Users\Admin\AppData\Local\Temp\4a7bc46227627241e9b1a8c09aa9929fc428e83bee584425d64374a8e14ef097.exe
      "C:\Users\Admin\AppData\Local\Temp\4a7bc46227627241e9b1a8c09aa9929fc428e83bee584425d64374a8e14ef097.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2828

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

File and Directory Permissions Modification

T1222

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 1KB
SHA256 54cc65132b872986c4f2732c6cf32808cacdef62d791119206341cf869a697b2
MD5 e81745868ede46dc0c32deb3f0a491df
SHA1 2e8d42c6611b9dd788a1120905960d32b8e5fea6
SHA512 13b8cd6c0b774500613c263c37161caf9ea35d51e92207f247bb98c1bf30bcfcd01e807992d9c3459c1247f5e649a06c29356618e571b464828017494c8ad14a
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 724B
SHA256 58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5
MD5 8202a1cd02e7d69597995cabbe881a12
SHA1 8858d9d934b7aa9330ee73de6c476acf19929ff6
SHA512 97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9
MD5 SHA1 SHA512

Submit Download

24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 410B
SHA256 7faa75992e86f9c7c34cb67fc8bf803977a7a460593f9dfdd3816a2959d397a6
MD5 7c48b9d8ca5a120f5cf4ee603faedc43
SHA1 2ab93027ca713431d588332ca2601081f1dcd9e4
SHA512 b0f119ae81910805182c8f8c2fde9794e74127f0e9bb05006b78ee3bf8b54adb5d23152be7b0d2576afd44e33541ae4d096f67c689379d448aa283615b22b2e1
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 be2aecd6bc740246b9e6c8dd44de4cb912402912635622572999bb45250ae645
MD5 756701ebfcc86cf14917e512b5b43237
SHA1 61467d0b92fabcd6973f660e2ab82a4b5864abb5
SHA512 9a20f9fb5abeeba46e2ebe890ec7150e64a8fcf421ec2541d71b1d3aa04007964945dece9ddf649e6c48a034324a6b761edd0cf2f342dbe4470c70c3d0d7539b
MD5 SHA1 SHA512

Submit Download

4a7bc46227627241e9b1a8c09aa9929fc428e83bee584425d64374a8e14ef097.exe

Path C:\Users\Admin\AppData\Local\381d408c-75ab-4f75-806e-1ba1100d9466\4a7bc46227627241e9b1a8c09aa9929fc428e83bee584425d64374a8e14ef097.exe
Size 758KB
SHA256 4a7bc46227627241e9b1a8c09aa9929fc428e83bee584425d64374a8e14ef097
MD5 8694728a91d75f0499ec50f3a5069c92
SHA1 fa746ac0033bf4902c1967c90d54b9d38dade8e5
SHA512 e87a4b5b1ed8f9b23fabab2cac197755af2e94501e91bb180b3693184f06c86a80779ec24041195cebb59733f9f38aca3dee0a1c5a2f8856b0b32c7c700a5242
SSDEEP 12288:WwMZHx36OiVm0624CW0MVZzJ2EECuJ4VwIQUSe/0PWX2Ceia:WwSXGmBkeNvuawIQUpOEa
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/720-5-0x0000000004AC0000-0x0000000004BDB000-memory.dmp

Download

memory/720-1-0x0000000004A20000-0x0000000004ABE000-memory.dmp

Download

memory/2756-4-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/2756-2-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/2756-21-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/2756-6-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/2756-3-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/2828-31-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/2828-32-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/2828-24-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/2828-33-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/2828-36-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/2828-38-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/2828-39-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/2828-40-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/2828-41-0x0000000000400000-0x0000000000537000-memory.dmp

Download