djvu | 574dbd27dcf5b2169a141a0d67d71d47f7c417c84b397120c04b88968c4eedb9

Analysis

max time kernel
145s
max time network
124s
platform
windows11-21h2_x64
resource
win11-20240412-en
resource tags

arch:x64arch:x86image:win11-20240412-enlocale:en-usos:windows11-21h2-x64system
submitted
25/04/2024, 07:33

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General

Target
574dbd27dcf5b2169a141a0d67d71d47f7c417c84b397120c04b88968c4eedb9.exe
Size 771KB
Sample240425-jdmt8agh4s
SHA256 574dbd27dcf5b2169a141a0d67d71d47f7c417c84b397120c04b88968c4eedb9
MD5 b887f35dfacc72de3b8b3fea5ba8756c
SHA1 376f7b7027bc36c60bac41b2dd6ab1a08cf6d35b
SHA512 aa8896fa5d2417786bd30bbaa3656e7f7bc2bc123674042a8e7f1f60384bafb68bad6e078a263dc18ae014b908640cc18f4acb186b08daea2163891ad8c28cbd
SSDEEP 12288:Ofwno37mCL7Gu9QUETo1SNG0h1s/b5gq0p6k1Swg7QKrQvL:yJrmUjiUaokPh125gLp+LQFD
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.bgjs
offline_id
Z6iwSvCoAt8T8K2ROxecuXHPNHv7eDyWrc8Ks7t1
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/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/4444-2-0x0000000004C50000-0x0000000004D6B000-memory.dmp	family_djvu
behavioral2/memory/4624-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4624-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4624-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4624-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4624-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2616-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2616-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2616-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2616-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2616-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2616-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2616-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2616-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2616-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2616-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2616-39-0x0000000000400000-0x0000000000537000-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
4840	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-1-5-21-2718508534-2116753757-2794822388-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\05ee140b-2f7f-48bd-b91f-1e968db20652\\574dbd27dcf5b2169a141a0d67d71d47f7c417c84b397120c04b88968c4eedb9.exe\" --AutoStart"	574dbd27dcf5b2169a141a0d67d71d47f7c417c84b397120c04b88968c4eedb9.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
8	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4444 set thread context of 4624	4444	574dbd27dcf5b2169a141a0d67d71d47f7c417c84b397120c04b88968c4eedb9.exe	81
PID 3112 set thread context of 2616	3112	574dbd27dcf5b2169a141a0d67d71d47f7c417c84b397120c04b88968c4eedb9.exe	86

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
4624	574dbd27dcf5b2169a141a0d67d71d47f7c417c84b397120c04b88968c4eedb9.exe
4624	574dbd27dcf5b2169a141a0d67d71d47f7c417c84b397120c04b88968c4eedb9.exe
2616	574dbd27dcf5b2169a141a0d67d71d47f7c417c84b397120c04b88968c4eedb9.exe
2616	574dbd27dcf5b2169a141a0d67d71d47f7c417c84b397120c04b88968c4eedb9.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4444 wrote to memory of 4624	4444	574dbd27dcf5b2169a141a0d67d71d47f7c417c84b397120c04b88968c4eedb9.exe	81
PID 4444 wrote to memory of 4624	4444	574dbd27dcf5b2169a141a0d67d71d47f7c417c84b397120c04b88968c4eedb9.exe	81
PID 4444 wrote to memory of 4624	4444	574dbd27dcf5b2169a141a0d67d71d47f7c417c84b397120c04b88968c4eedb9.exe	81
PID 4444 wrote to memory of 4624	4444	574dbd27dcf5b2169a141a0d67d71d47f7c417c84b397120c04b88968c4eedb9.exe	81
PID 4444 wrote to memory of 4624	4444	574dbd27dcf5b2169a141a0d67d71d47f7c417c84b397120c04b88968c4eedb9.exe	81
PID 4444 wrote to memory of 4624	4444	574dbd27dcf5b2169a141a0d67d71d47f7c417c84b397120c04b88968c4eedb9.exe	81
PID 4444 wrote to memory of 4624	4444	574dbd27dcf5b2169a141a0d67d71d47f7c417c84b397120c04b88968c4eedb9.exe	81
PID 4444 wrote to memory of 4624	4444	574dbd27dcf5b2169a141a0d67d71d47f7c417c84b397120c04b88968c4eedb9.exe	81
PID 4444 wrote to memory of 4624	4444	574dbd27dcf5b2169a141a0d67d71d47f7c417c84b397120c04b88968c4eedb9.exe	81
PID 4444 wrote to memory of 4624	4444	574dbd27dcf5b2169a141a0d67d71d47f7c417c84b397120c04b88968c4eedb9.exe	81
PID 4624 wrote to memory of 4840	4624	574dbd27dcf5b2169a141a0d67d71d47f7c417c84b397120c04b88968c4eedb9.exe	82
PID 4624 wrote to memory of 4840	4624	574dbd27dcf5b2169a141a0d67d71d47f7c417c84b397120c04b88968c4eedb9.exe	82
PID 4624 wrote to memory of 4840	4624	574dbd27dcf5b2169a141a0d67d71d47f7c417c84b397120c04b88968c4eedb9.exe	82
PID 4624 wrote to memory of 3112	4624	574dbd27dcf5b2169a141a0d67d71d47f7c417c84b397120c04b88968c4eedb9.exe	83
PID 4624 wrote to memory of 3112	4624	574dbd27dcf5b2169a141a0d67d71d47f7c417c84b397120c04b88968c4eedb9.exe	83
PID 4624 wrote to memory of 3112	4624	574dbd27dcf5b2169a141a0d67d71d47f7c417c84b397120c04b88968c4eedb9.exe	83
PID 3112 wrote to memory of 2616	3112	574dbd27dcf5b2169a141a0d67d71d47f7c417c84b397120c04b88968c4eedb9.exe	86
PID 3112 wrote to memory of 2616	3112	574dbd27dcf5b2169a141a0d67d71d47f7c417c84b397120c04b88968c4eedb9.exe	86
PID 3112 wrote to memory of 2616	3112	574dbd27dcf5b2169a141a0d67d71d47f7c417c84b397120c04b88968c4eedb9.exe	86
PID 3112 wrote to memory of 2616	3112	574dbd27dcf5b2169a141a0d67d71d47f7c417c84b397120c04b88968c4eedb9.exe	86
PID 3112 wrote to memory of 2616	3112	574dbd27dcf5b2169a141a0d67d71d47f7c417c84b397120c04b88968c4eedb9.exe	86
PID 3112 wrote to memory of 2616	3112	574dbd27dcf5b2169a141a0d67d71d47f7c417c84b397120c04b88968c4eedb9.exe	86
PID 3112 wrote to memory of 2616	3112	574dbd27dcf5b2169a141a0d67d71d47f7c417c84b397120c04b88968c4eedb9.exe	86
PID 3112 wrote to memory of 2616	3112	574dbd27dcf5b2169a141a0d67d71d47f7c417c84b397120c04b88968c4eedb9.exe	86
PID 3112 wrote to memory of 2616	3112	574dbd27dcf5b2169a141a0d67d71d47f7c417c84b397120c04b88968c4eedb9.exe	86
PID 3112 wrote to memory of 2616	3112	574dbd27dcf5b2169a141a0d67d71d47f7c417c84b397120c04b88968c4eedb9.exe	86

C:\Users\Admin\AppData\Local\Temp\574dbd27dcf5b2169a141a0d67d71d47f7c417c84b397120c04b88968c4eedb9.exe
"C:\Users\Admin\AppData\Local\Temp\574dbd27dcf5b2169a141a0d67d71d47f7c417c84b397120c04b88968c4eedb9.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4444
- C:\Users\Admin\AppData\Local\Temp\574dbd27dcf5b2169a141a0d67d71d47f7c417c84b397120c04b88968c4eedb9.exe
  "C:\Users\Admin\AppData\Local\Temp\574dbd27dcf5b2169a141a0d67d71d47f7c417c84b397120c04b88968c4eedb9.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4624
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\05ee140b-2f7f-48bd-b91f-1e968db20652" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:4840
- - C:\Users\Admin\AppData\Local\Temp\574dbd27dcf5b2169a141a0d67d71d47f7c417c84b397120c04b88968c4eedb9.exe
    "C:\Users\Admin\AppData\Local\Temp\574dbd27dcf5b2169a141a0d67d71d47f7c417c84b397120c04b88968c4eedb9.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:3112
  - - C:\Users\Admin\AppData\Local\Temp\574dbd27dcf5b2169a141a0d67d71d47f7c417c84b397120c04b88968c4eedb9.exe
      "C:\Users\Admin\AppData\Local\Temp\574dbd27dcf5b2169a141a0d67d71d47f7c417c84b397120c04b88968c4eedb9.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2616

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 382e6d80f80afb665a9c3065602a8fb4a6c3ff73c06a0a6937ffc178466d97a2
MD5 cb9e9c73d3688b51ee1899e25cd1cc7e
SHA1 b2d472d87ac099a708b7536b5c30e5e6f0d28b7e
SHA512 74f1d7c3c68c0ae4ebc7b1c270c2138f578b78b591d8c6af4b7bb56fd4f23e5cebdf9748e7045521c72c000e5a4f35adce8e62951470e65c531f95b26b52a54e
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 123f9755b8f7542ba8c1523f7b7c2194f262de8d5b1d48d4b71a9e8a76900494
MD5 ada1dc627a1864ae53214094aeca116e
SHA1 d8c4370300c351fadfe5d183f1bd3d5b5acd5063
SHA512 65fe83275d7a2813c2dd2b3543e9445d953b6779f5746905279908a14c2d18242873562f46076314de5d74903fe5d5553962f8feac091668da2c0b9c81764019
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 c4bb1d3b36de7be0ecc146976f72f70e30265c5a71baeeda6bf05511b1a709cb
MD5 537f78af9de05226a9c52c1f0f02ccc6
SHA1 28289509720b552e0ba11c9723355d0600d2cd82
SHA512 cfc9f23889b9d6883aa36bf512e0d07e690a6c4ed963bd4e25b0639f76589613d9444df506bb932aaf17bc20da47bf9fdfe645e277fe8788ede8e9a792e45923
MD5 SHA1 SHA512

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574dbd27dcf5b2169a141a0d67d71d47f7c417c84b397120c04b88968c4eedb9.exe

Path C:\Users\Admin\AppData\Local\05ee140b-2f7f-48bd-b91f-1e968db20652\574dbd27dcf5b2169a141a0d67d71d47f7c417c84b397120c04b88968c4eedb9.exe
Size 771KB
SHA256 574dbd27dcf5b2169a141a0d67d71d47f7c417c84b397120c04b88968c4eedb9
MD5 b887f35dfacc72de3b8b3fea5ba8756c
SHA1 376f7b7027bc36c60bac41b2dd6ab1a08cf6d35b
SHA512 aa8896fa5d2417786bd30bbaa3656e7f7bc2bc123674042a8e7f1f60384bafb68bad6e078a263dc18ae014b908640cc18f4acb186b08daea2163891ad8c28cbd
SSDEEP 12288:Ofwno37mCL7Gu9QUETo1SNG0h1s/b5gq0p6k1Swg7QKrQvL:yJrmUjiUaokPh125gLp+LQFD
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/2616-30-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2616-31-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2616-39-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2616-38-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2616-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2616-23-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2616-24-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2616-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2616-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2616-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2616-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3112-20-0x0000000003110000-0x00000000031A9000-memory.dmp

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memory/4444-2-0x0000000004C50000-0x0000000004D6B000-memory.dmp

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memory/4444-1-0x0000000003230000-0x00000000032C6000-memory.dmp

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memory/4624-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4624-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4624-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4624-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4624-17-0x0000000000400000-0x0000000000537000-memory.dmp

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