djvu | c6e98bb4a581fc85ae05ca549b5045880ad9b3ac490deaa83d12d8800481c7e2

Analysis

max time kernel
146s
max time network
151s
platform
windows11-21h2_x64
resource
win11-20240412-en
resource tags

arch:x64arch:x86image:win11-20240412-enlocale:en-usos:windows11-21h2-x64system
submitted
22/04/2024, 00:44

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General

Target
c6e98bb4a581fc85ae05ca549b5045880ad9b3ac490deaa83d12d8800481c7e2.exe
Size 757KB
Sample240422-a3r1ssdb46
SHA256 c6e98bb4a581fc85ae05ca549b5045880ad9b3ac490deaa83d12d8800481c7e2
MD5 925684e1543282ec1853780355e3c626
SHA1 08c3a7adc8f2372cb1831a8a617e131885cc6660
SHA512 2b5df7ca4d98fda0264f13d91331b33d8d0fb563e97d44b48fc9d805a3312d02bc40bd206fa79db3ec772a12b2022fec997d9596ebd9577e286a28571f70cb1c
SSDEEP 12288:NITrEROrBL8kCcLkGJ2ss1r4+yHgUPu7ChyU3b3QWBnax0asqJKmH7A0SZ:62ete6z+yAyu7XeasMHE0O
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.bgjs
offline_id
Z6iwSvCoAt8T8K2ROxecuXHPNHv7eDyWrc8Ks7t1
payload_url
http://sdfjhuz.com/dl/build2.exe

http://sajdfue.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/54cdfd152fe98eedb628a1f4ddb7076420240421150208/403a27 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: 0863PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 17 IoCs

resource	yara_rule
behavioral2/memory/1480-2-0x0000000006040000-0x000000000615B000-memory.dmp	family_djvu
behavioral2/memory/2100-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2100-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2100-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2100-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2100-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2964-25-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2964-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2964-26-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2964-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2964-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2964-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2964-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2964-40-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2964-41-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2964-42-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2964-43-0x0000000000400000-0x0000000000537000-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
1748	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-1-5-21-801765966-3955847401-2235691403-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\12404455-0c09-4ba4-97d9-c07bfb029279\\c6e98bb4a581fc85ae05ca549b5045880ad9b3ac490deaa83d12d8800481c7e2.exe\" --AutoStart"	c6e98bb4a581fc85ae05ca549b5045880ad9b3ac490deaa83d12d8800481c7e2.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
1	api.2ip.ua
2	api.2ip.ua
6	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1480 set thread context of 2100	1480	c6e98bb4a581fc85ae05ca549b5045880ad9b3ac490deaa83d12d8800481c7e2.exe	78
PID 4212 set thread context of 2964	4212	c6e98bb4a581fc85ae05ca549b5045880ad9b3ac490deaa83d12d8800481c7e2.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
2100	c6e98bb4a581fc85ae05ca549b5045880ad9b3ac490deaa83d12d8800481c7e2.exe
2100	c6e98bb4a581fc85ae05ca549b5045880ad9b3ac490deaa83d12d8800481c7e2.exe
2964	c6e98bb4a581fc85ae05ca549b5045880ad9b3ac490deaa83d12d8800481c7e2.exe
2964	c6e98bb4a581fc85ae05ca549b5045880ad9b3ac490deaa83d12d8800481c7e2.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1480 wrote to memory of 2100	1480	c6e98bb4a581fc85ae05ca549b5045880ad9b3ac490deaa83d12d8800481c7e2.exe	78
PID 1480 wrote to memory of 2100	1480	c6e98bb4a581fc85ae05ca549b5045880ad9b3ac490deaa83d12d8800481c7e2.exe	78
PID 1480 wrote to memory of 2100	1480	c6e98bb4a581fc85ae05ca549b5045880ad9b3ac490deaa83d12d8800481c7e2.exe	78
PID 1480 wrote to memory of 2100	1480	c6e98bb4a581fc85ae05ca549b5045880ad9b3ac490deaa83d12d8800481c7e2.exe	78
PID 1480 wrote to memory of 2100	1480	c6e98bb4a581fc85ae05ca549b5045880ad9b3ac490deaa83d12d8800481c7e2.exe	78
PID 1480 wrote to memory of 2100	1480	c6e98bb4a581fc85ae05ca549b5045880ad9b3ac490deaa83d12d8800481c7e2.exe	78
PID 1480 wrote to memory of 2100	1480	c6e98bb4a581fc85ae05ca549b5045880ad9b3ac490deaa83d12d8800481c7e2.exe	78
PID 1480 wrote to memory of 2100	1480	c6e98bb4a581fc85ae05ca549b5045880ad9b3ac490deaa83d12d8800481c7e2.exe	78
PID 1480 wrote to memory of 2100	1480	c6e98bb4a581fc85ae05ca549b5045880ad9b3ac490deaa83d12d8800481c7e2.exe	78
PID 1480 wrote to memory of 2100	1480	c6e98bb4a581fc85ae05ca549b5045880ad9b3ac490deaa83d12d8800481c7e2.exe	78
PID 2100 wrote to memory of 1748	2100	c6e98bb4a581fc85ae05ca549b5045880ad9b3ac490deaa83d12d8800481c7e2.exe	80
PID 2100 wrote to memory of 1748	2100	c6e98bb4a581fc85ae05ca549b5045880ad9b3ac490deaa83d12d8800481c7e2.exe	80
PID 2100 wrote to memory of 1748	2100	c6e98bb4a581fc85ae05ca549b5045880ad9b3ac490deaa83d12d8800481c7e2.exe	80
PID 2100 wrote to memory of 4212	2100	c6e98bb4a581fc85ae05ca549b5045880ad9b3ac490deaa83d12d8800481c7e2.exe	81
PID 2100 wrote to memory of 4212	2100	c6e98bb4a581fc85ae05ca549b5045880ad9b3ac490deaa83d12d8800481c7e2.exe	81
PID 2100 wrote to memory of 4212	2100	c6e98bb4a581fc85ae05ca549b5045880ad9b3ac490deaa83d12d8800481c7e2.exe	81
PID 4212 wrote to memory of 2964	4212	c6e98bb4a581fc85ae05ca549b5045880ad9b3ac490deaa83d12d8800481c7e2.exe	85
PID 4212 wrote to memory of 2964	4212	c6e98bb4a581fc85ae05ca549b5045880ad9b3ac490deaa83d12d8800481c7e2.exe	85
PID 4212 wrote to memory of 2964	4212	c6e98bb4a581fc85ae05ca549b5045880ad9b3ac490deaa83d12d8800481c7e2.exe	85
PID 4212 wrote to memory of 2964	4212	c6e98bb4a581fc85ae05ca549b5045880ad9b3ac490deaa83d12d8800481c7e2.exe	85
PID 4212 wrote to memory of 2964	4212	c6e98bb4a581fc85ae05ca549b5045880ad9b3ac490deaa83d12d8800481c7e2.exe	85
PID 4212 wrote to memory of 2964	4212	c6e98bb4a581fc85ae05ca549b5045880ad9b3ac490deaa83d12d8800481c7e2.exe	85
PID 4212 wrote to memory of 2964	4212	c6e98bb4a581fc85ae05ca549b5045880ad9b3ac490deaa83d12d8800481c7e2.exe	85
PID 4212 wrote to memory of 2964	4212	c6e98bb4a581fc85ae05ca549b5045880ad9b3ac490deaa83d12d8800481c7e2.exe	85
PID 4212 wrote to memory of 2964	4212	c6e98bb4a581fc85ae05ca549b5045880ad9b3ac490deaa83d12d8800481c7e2.exe	85
PID 4212 wrote to memory of 2964	4212	c6e98bb4a581fc85ae05ca549b5045880ad9b3ac490deaa83d12d8800481c7e2.exe	85

C:\Users\Admin\AppData\Local\Temp\c6e98bb4a581fc85ae05ca549b5045880ad9b3ac490deaa83d12d8800481c7e2.exe
"C:\Users\Admin\AppData\Local\Temp\c6e98bb4a581fc85ae05ca549b5045880ad9b3ac490deaa83d12d8800481c7e2.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1480
- C:\Users\Admin\AppData\Local\Temp\c6e98bb4a581fc85ae05ca549b5045880ad9b3ac490deaa83d12d8800481c7e2.exe
  "C:\Users\Admin\AppData\Local\Temp\c6e98bb4a581fc85ae05ca549b5045880ad9b3ac490deaa83d12d8800481c7e2.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2100
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\12404455-0c09-4ba4-97d9-c07bfb029279" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:1748
- - C:\Users\Admin\AppData\Local\Temp\c6e98bb4a581fc85ae05ca549b5045880ad9b3ac490deaa83d12d8800481c7e2.exe
    "C:\Users\Admin\AppData\Local\Temp\c6e98bb4a581fc85ae05ca549b5045880ad9b3ac490deaa83d12d8800481c7e2.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:4212
  - - C:\Users\Admin\AppData\Local\Temp\c6e98bb4a581fc85ae05ca549b5045880ad9b3ac490deaa83d12d8800481c7e2.exe
      "C:\Users\Admin\AppData\Local\Temp\c6e98bb4a581fc85ae05ca549b5045880ad9b3ac490deaa83d12d8800481c7e2.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2964

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

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Downloads

24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 1KB
SHA256 a5553e0213c248272671a9e9bd11ccff7656d1eb324f57ca50d1c2d97d166fa7
MD5 9bf3a1941056959a5eba7360314bdcbc
SHA1 99344d4525cc7a159ab9cfd079b6dd0345df6851
SHA512 6e210003c3b60dc929c7d825d4bae7eff3d4ace398cb8eea6e26fcfe11fa57c2d5c9fd224bff751e91a12860f96a0fc450ec07a820b8eb01b46ec855cf71a08c
MD5 SHA1 SHA512

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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

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24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 410B
SHA256 9d3eabd188af3aa3052d22b4f3dae7ca598dceddc2fd62756509c5c6e9e0210f
MD5 8bba676c719fde9916c050a9b9d63c65
SHA1 5ae7854a7d3966fe4156d48e46123ba4bbc94306
SHA512 be56dc247a2455f8053bbedc9cf7f017b9b5b6d98cb5c4eb681ab885570ccad1c61ceb5aa3675291897a01af9b26ad36fb80b2ac75c57f0b4e579adf6e7ee2dc
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 03aa8753a12d327efaa0c8cd7499c358780288952211c2d41575ff85912bbb9f
MD5 d58ad9ce99360fa4a4e81077983efb75
SHA1 3ce856f2ae3800311bdba9d7332bcf6b7090ce27
SHA512 6b57596ffa06456673499bc24d0362bb2e363282bcc67eb7c35ce748348a395cfa5347460f926a03dc73c57bbbbef213fae3c316bd92e7e35451f4f427ec24fa
MD5 SHA1 SHA512

Submit Download

c6e98bb4a581fc85ae05ca549b5045880ad9b3ac490deaa83d12d8800481c7e2.exe

Path C:\Users\Admin\AppData\Local\12404455-0c09-4ba4-97d9-c07bfb029279\c6e98bb4a581fc85ae05ca549b5045880ad9b3ac490deaa83d12d8800481c7e2.exe
Size 757KB
SHA256 c6e98bb4a581fc85ae05ca549b5045880ad9b3ac490deaa83d12d8800481c7e2
MD5 925684e1543282ec1853780355e3c626
SHA1 08c3a7adc8f2372cb1831a8a617e131885cc6660
SHA512 2b5df7ca4d98fda0264f13d91331b33d8d0fb563e97d44b48fc9d805a3312d02bc40bd206fa79db3ec772a12b2022fec997d9596ebd9577e286a28571f70cb1c
SSDEEP 12288:NITrEROrBL8kCcLkGJ2ss1r4+yHgUPu7ChyU3b3QWBnax0asqJKmH7A0SZ:62ete6z+yAyu7XeasMHE0O
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1480-1-0x0000000004800000-0x0000000004894000-memory.dmp

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memory/1480-2-0x0000000006040000-0x000000000615B000-memory.dmp

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memory/2100-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2100-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2100-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2100-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2100-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2964-25-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2964-26-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2964-24-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2964-33-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2964-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2964-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2964-38-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2964-40-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2964-41-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2964-42-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2964-43-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4212-22-0x0000000004500000-0x000000000459C000-memory.dmp

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