djvu | 453828f33a749ebef5a1338237a17bd0738ced4392139ff2f911308052911c7f

Analysis

max time kernel
145s
max time network
123s
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, 09:42

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General

Target
453828f33a749ebef5a1338237a17bd0738ced4392139ff2f911308052911c7f.exe
Size 771KB
Sample240425-lpg48ahe42
SHA256 453828f33a749ebef5a1338237a17bd0738ced4392139ff2f911308052911c7f
MD5 9560fb4eb84759382dd5edfec54bec27
SHA1 7688c98cab62daf9ec00c3316d71bbc7368f5a3c
SHA512 9bb57a49100acf419e704d1ea3e43cd78148bff8df14e16e36a07339a0b257f2fbecab3f681d8476b9aa1fd5cf0701c9d331c8f73273efd0ede1ed3b1b93f398
SSDEEP 12288:6gcm7qu9vVYCvOdnLUhkMVjp4G6rz4Vx34TV+1KGiddX3wMpHkmTqpPQEiAVoNCn:Imr9uCwUrJpwr2icKGgHvJWpPJN
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/5336-2-0x0000000004AE0000-0x0000000004BFB000-memory.dmp	family_djvu
behavioral2/memory/2796-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2796-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2796-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2796-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2796-15-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1996-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1996-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1996-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1996-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1996-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1996-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1996-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1996-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1996-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1996-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1996-37-0x0000000000400000-0x0000000000537000-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
3776	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-1-5-21-801878912-692986033-442676226-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\d9ce14d3-3f9b-4386-9e64-0eafc2527199\\453828f33a749ebef5a1338237a17bd0738ced4392139ff2f911308052911c7f.exe\" --AutoStart"	453828f33a749ebef5a1338237a17bd0738ced4392139ff2f911308052911c7f.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
15	api.2ip.ua
17	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 5336 set thread context of 2796	5336	453828f33a749ebef5a1338237a17bd0738ced4392139ff2f911308052911c7f.exe	80
PID 3796 set thread context of 1996	3796	453828f33a749ebef5a1338237a17bd0738ced4392139ff2f911308052911c7f.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
2796	453828f33a749ebef5a1338237a17bd0738ced4392139ff2f911308052911c7f.exe
2796	453828f33a749ebef5a1338237a17bd0738ced4392139ff2f911308052911c7f.exe
1996	453828f33a749ebef5a1338237a17bd0738ced4392139ff2f911308052911c7f.exe
1996	453828f33a749ebef5a1338237a17bd0738ced4392139ff2f911308052911c7f.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 5336 wrote to memory of 2796	5336	453828f33a749ebef5a1338237a17bd0738ced4392139ff2f911308052911c7f.exe	80
PID 5336 wrote to memory of 2796	5336	453828f33a749ebef5a1338237a17bd0738ced4392139ff2f911308052911c7f.exe	80
PID 5336 wrote to memory of 2796	5336	453828f33a749ebef5a1338237a17bd0738ced4392139ff2f911308052911c7f.exe	80
PID 5336 wrote to memory of 2796	5336	453828f33a749ebef5a1338237a17bd0738ced4392139ff2f911308052911c7f.exe	80
PID 5336 wrote to memory of 2796	5336	453828f33a749ebef5a1338237a17bd0738ced4392139ff2f911308052911c7f.exe	80
PID 5336 wrote to memory of 2796	5336	453828f33a749ebef5a1338237a17bd0738ced4392139ff2f911308052911c7f.exe	80
PID 5336 wrote to memory of 2796	5336	453828f33a749ebef5a1338237a17bd0738ced4392139ff2f911308052911c7f.exe	80
PID 5336 wrote to memory of 2796	5336	453828f33a749ebef5a1338237a17bd0738ced4392139ff2f911308052911c7f.exe	80
PID 5336 wrote to memory of 2796	5336	453828f33a749ebef5a1338237a17bd0738ced4392139ff2f911308052911c7f.exe	80
PID 5336 wrote to memory of 2796	5336	453828f33a749ebef5a1338237a17bd0738ced4392139ff2f911308052911c7f.exe	80
PID 2796 wrote to memory of 3776	2796	453828f33a749ebef5a1338237a17bd0738ced4392139ff2f911308052911c7f.exe	81
PID 2796 wrote to memory of 3776	2796	453828f33a749ebef5a1338237a17bd0738ced4392139ff2f911308052911c7f.exe	81
PID 2796 wrote to memory of 3776	2796	453828f33a749ebef5a1338237a17bd0738ced4392139ff2f911308052911c7f.exe	81
PID 2796 wrote to memory of 3796	2796	453828f33a749ebef5a1338237a17bd0738ced4392139ff2f911308052911c7f.exe	82
PID 2796 wrote to memory of 3796	2796	453828f33a749ebef5a1338237a17bd0738ced4392139ff2f911308052911c7f.exe	82
PID 2796 wrote to memory of 3796	2796	453828f33a749ebef5a1338237a17bd0738ced4392139ff2f911308052911c7f.exe	82
PID 3796 wrote to memory of 1996	3796	453828f33a749ebef5a1338237a17bd0738ced4392139ff2f911308052911c7f.exe	85
PID 3796 wrote to memory of 1996	3796	453828f33a749ebef5a1338237a17bd0738ced4392139ff2f911308052911c7f.exe	85
PID 3796 wrote to memory of 1996	3796	453828f33a749ebef5a1338237a17bd0738ced4392139ff2f911308052911c7f.exe	85
PID 3796 wrote to memory of 1996	3796	453828f33a749ebef5a1338237a17bd0738ced4392139ff2f911308052911c7f.exe	85
PID 3796 wrote to memory of 1996	3796	453828f33a749ebef5a1338237a17bd0738ced4392139ff2f911308052911c7f.exe	85
PID 3796 wrote to memory of 1996	3796	453828f33a749ebef5a1338237a17bd0738ced4392139ff2f911308052911c7f.exe	85
PID 3796 wrote to memory of 1996	3796	453828f33a749ebef5a1338237a17bd0738ced4392139ff2f911308052911c7f.exe	85
PID 3796 wrote to memory of 1996	3796	453828f33a749ebef5a1338237a17bd0738ced4392139ff2f911308052911c7f.exe	85
PID 3796 wrote to memory of 1996	3796	453828f33a749ebef5a1338237a17bd0738ced4392139ff2f911308052911c7f.exe	85
PID 3796 wrote to memory of 1996	3796	453828f33a749ebef5a1338237a17bd0738ced4392139ff2f911308052911c7f.exe	85

C:\Users\Admin\AppData\Local\Temp\453828f33a749ebef5a1338237a17bd0738ced4392139ff2f911308052911c7f.exe
"C:\Users\Admin\AppData\Local\Temp\453828f33a749ebef5a1338237a17bd0738ced4392139ff2f911308052911c7f.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:5336
- C:\Users\Admin\AppData\Local\Temp\453828f33a749ebef5a1338237a17bd0738ced4392139ff2f911308052911c7f.exe
  "C:\Users\Admin\AppData\Local\Temp\453828f33a749ebef5a1338237a17bd0738ced4392139ff2f911308052911c7f.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2796
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\d9ce14d3-3f9b-4386-9e64-0eafc2527199" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:3776
- - C:\Users\Admin\AppData\Local\Temp\453828f33a749ebef5a1338237a17bd0738ced4392139ff2f911308052911c7f.exe
    "C:\Users\Admin\AppData\Local\Temp\453828f33a749ebef5a1338237a17bd0738ced4392139ff2f911308052911c7f.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:3796
  - - C:\Users\Admin\AppData\Local\Temp\453828f33a749ebef5a1338237a17bd0738ced4392139ff2f911308052911c7f.exe
      "C:\Users\Admin\AppData\Local\Temp\453828f33a749ebef5a1338237a17bd0738ced4392139ff2f911308052911c7f.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:1996

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 71a7de8712769550353c4c1f45465046799c831329fb7de06a8c884b9f551e3f
MD5 b582a2252bbb95d18b33ea7643c3e085
SHA1 02c85d3c460bda50f9344b6e653ac599ee23a69b
SHA512 7178fa36038fb35e0fbce22fc723cdb30f915741a3c8d9264d9718369206a568661d845defc69afd8b88989c379f8075847828b28af029e22ce3d925729350fc
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 52b11fc1fa69a31101bec47c9d2a7795bf8e432742f0da2218290f1f87252dcb
MD5 57fb515c2c53df4e4f9c0d1c8d8801dd
SHA1 c6a1d77336b6e00f5bd84a8f8a81beb25907a871
SHA512 f4f28e3b55f9a07a96a5cfd32bb85b9411c23dd5fc80b45971b5f1b90302c5de6edfcf79c8fd2d976e77680bedf9fe4a138d9aba120663273f2671cfafa34437
MD5 SHA1 SHA512

Submit Download

453828f33a749ebef5a1338237a17bd0738ced4392139ff2f911308052911c7f.exe

Path C:\Users\Admin\AppData\Local\d9ce14d3-3f9b-4386-9e64-0eafc2527199\453828f33a749ebef5a1338237a17bd0738ced4392139ff2f911308052911c7f.exe
Size 771KB
SHA256 453828f33a749ebef5a1338237a17bd0738ced4392139ff2f911308052911c7f
MD5 9560fb4eb84759382dd5edfec54bec27
SHA1 7688c98cab62daf9ec00c3316d71bbc7368f5a3c
SHA512 9bb57a49100acf419e704d1ea3e43cd78148bff8df14e16e36a07339a0b257f2fbecab3f681d8476b9aa1fd5cf0701c9d331c8f73273efd0ede1ed3b1b93f398
SSDEEP 12288:6gcm7qu9vVYCvOdnLUhkMVjp4G6rz4Vx34TV+1KGiddX3wMpHkmTqpPQEiAVoNCn:Imr9uCwUrJpwr2icKGgHvJWpPJN
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1996-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1996-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1996-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1996-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1996-21-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1996-20-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1996-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1996-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1996-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1996-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1996-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2796-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2796-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2796-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2796-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2796-15-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3796-18-0x0000000003180000-0x000000000321B000-memory.dmp

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memory/5336-2-0x0000000004AE0000-0x0000000004BFB000-memory.dmp

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memory/5336-1-0x0000000003230000-0x00000000032D1000-memory.dmp

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