djvu | d5f8148777eff884b5c5b63165a115a16a2ddc2efee240c4a1b6f52def333e49

Analysis

max time kernel
147s
max time network
150s
platform
windows11-21h2_x64
resource
win11-20240419-en
resource tags

arch:x64arch:x86image:win11-20240419-enlocale:en-usos:windows11-21h2-x64system
submitted
03/05/2024, 12:34

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General

Target
d5f8148777eff884b5c5b63165a115a16a2ddc2efee240c4a1b6f52def333e49.exe
Size 817KB
Sample240503-pr4msage23
SHA256 d5f8148777eff884b5c5b63165a115a16a2ddc2efee240c4a1b6f52def333e49
MD5 2e4811e11a4e3ad828f16e4852e9c86b
SHA1 7c5dc4fa3319a0cc7a36b45ddb7ebcd3e5dac7c4
SHA512 d630a8325cb31daf72f38efa1123a4bf067e3018746ff63715befe3885ba26734fd4b156649550d587b49add2f27b90c026da29c7ebafbcd9d8fc32754868c51
SSDEEP 12288:x+UCyoJs8IPtySPACDm+RJhjZM5GGFMF50NAQYjoUi:qRsvPtyBCLThjZMIRUd4o
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 18 IoCs

resource	yara_rule
behavioral2/memory/2160-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2160-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4660-2-0x0000000003840000-0x000000000395B000-memory.dmp	family_djvu
behavioral2/memory/2160-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2160-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2160-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1160-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1160-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1160-25-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1160-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1160-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1160-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3584-34-0x0000000000400000-0x0000000001A97000-memory.dmp	family_djvu
behavioral2/memory/1160-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1160-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1160-39-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1160-40-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1160-41-0x0000000000400000-0x0000000000537000-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
2968	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-1-5-21-891789021-684472942-1795878712-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\db646dbc-f9ba-45e2-9c08-0613913d8a3f\\d5f8148777eff884b5c5b63165a115a16a2ddc2efee240c4a1b6f52def333e49.exe\" --AutoStart"	d5f8148777eff884b5c5b63165a115a16a2ddc2efee240c4a1b6f52def333e49.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
5	api.2ip.ua
1	api.2ip.ua
2	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4660 set thread context of 2160	4660	d5f8148777eff884b5c5b63165a115a16a2ddc2efee240c4a1b6f52def333e49.exe	80
PID 3584 set thread context of 1160	3584	d5f8148777eff884b5c5b63165a115a16a2ddc2efee240c4a1b6f52def333e49.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
2160	d5f8148777eff884b5c5b63165a115a16a2ddc2efee240c4a1b6f52def333e49.exe
2160	d5f8148777eff884b5c5b63165a115a16a2ddc2efee240c4a1b6f52def333e49.exe
1160	d5f8148777eff884b5c5b63165a115a16a2ddc2efee240c4a1b6f52def333e49.exe
1160	d5f8148777eff884b5c5b63165a115a16a2ddc2efee240c4a1b6f52def333e49.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4660 wrote to memory of 2160	4660	d5f8148777eff884b5c5b63165a115a16a2ddc2efee240c4a1b6f52def333e49.exe	80
PID 4660 wrote to memory of 2160	4660	d5f8148777eff884b5c5b63165a115a16a2ddc2efee240c4a1b6f52def333e49.exe	80
PID 4660 wrote to memory of 2160	4660	d5f8148777eff884b5c5b63165a115a16a2ddc2efee240c4a1b6f52def333e49.exe	80
PID 4660 wrote to memory of 2160	4660	d5f8148777eff884b5c5b63165a115a16a2ddc2efee240c4a1b6f52def333e49.exe	80
PID 4660 wrote to memory of 2160	4660	d5f8148777eff884b5c5b63165a115a16a2ddc2efee240c4a1b6f52def333e49.exe	80
PID 4660 wrote to memory of 2160	4660	d5f8148777eff884b5c5b63165a115a16a2ddc2efee240c4a1b6f52def333e49.exe	80
PID 4660 wrote to memory of 2160	4660	d5f8148777eff884b5c5b63165a115a16a2ddc2efee240c4a1b6f52def333e49.exe	80
PID 4660 wrote to memory of 2160	4660	d5f8148777eff884b5c5b63165a115a16a2ddc2efee240c4a1b6f52def333e49.exe	80
PID 4660 wrote to memory of 2160	4660	d5f8148777eff884b5c5b63165a115a16a2ddc2efee240c4a1b6f52def333e49.exe	80
PID 4660 wrote to memory of 2160	4660	d5f8148777eff884b5c5b63165a115a16a2ddc2efee240c4a1b6f52def333e49.exe	80
PID 2160 wrote to memory of 2968	2160	d5f8148777eff884b5c5b63165a115a16a2ddc2efee240c4a1b6f52def333e49.exe	82
PID 2160 wrote to memory of 2968	2160	d5f8148777eff884b5c5b63165a115a16a2ddc2efee240c4a1b6f52def333e49.exe	82
PID 2160 wrote to memory of 2968	2160	d5f8148777eff884b5c5b63165a115a16a2ddc2efee240c4a1b6f52def333e49.exe	82
PID 2160 wrote to memory of 3584	2160	d5f8148777eff884b5c5b63165a115a16a2ddc2efee240c4a1b6f52def333e49.exe	83
PID 2160 wrote to memory of 3584	2160	d5f8148777eff884b5c5b63165a115a16a2ddc2efee240c4a1b6f52def333e49.exe	83
PID 2160 wrote to memory of 3584	2160	d5f8148777eff884b5c5b63165a115a16a2ddc2efee240c4a1b6f52def333e49.exe	83
PID 3584 wrote to memory of 1160	3584	d5f8148777eff884b5c5b63165a115a16a2ddc2efee240c4a1b6f52def333e49.exe	86
PID 3584 wrote to memory of 1160	3584	d5f8148777eff884b5c5b63165a115a16a2ddc2efee240c4a1b6f52def333e49.exe	86
PID 3584 wrote to memory of 1160	3584	d5f8148777eff884b5c5b63165a115a16a2ddc2efee240c4a1b6f52def333e49.exe	86
PID 3584 wrote to memory of 1160	3584	d5f8148777eff884b5c5b63165a115a16a2ddc2efee240c4a1b6f52def333e49.exe	86
PID 3584 wrote to memory of 1160	3584	d5f8148777eff884b5c5b63165a115a16a2ddc2efee240c4a1b6f52def333e49.exe	86
PID 3584 wrote to memory of 1160	3584	d5f8148777eff884b5c5b63165a115a16a2ddc2efee240c4a1b6f52def333e49.exe	86
PID 3584 wrote to memory of 1160	3584	d5f8148777eff884b5c5b63165a115a16a2ddc2efee240c4a1b6f52def333e49.exe	86
PID 3584 wrote to memory of 1160	3584	d5f8148777eff884b5c5b63165a115a16a2ddc2efee240c4a1b6f52def333e49.exe	86
PID 3584 wrote to memory of 1160	3584	d5f8148777eff884b5c5b63165a115a16a2ddc2efee240c4a1b6f52def333e49.exe	86
PID 3584 wrote to memory of 1160	3584	d5f8148777eff884b5c5b63165a115a16a2ddc2efee240c4a1b6f52def333e49.exe	86

C:\Users\Admin\AppData\Local\Temp\d5f8148777eff884b5c5b63165a115a16a2ddc2efee240c4a1b6f52def333e49.exe
"C:\Users\Admin\AppData\Local\Temp\d5f8148777eff884b5c5b63165a115a16a2ddc2efee240c4a1b6f52def333e49.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4660
- C:\Users\Admin\AppData\Local\Temp\d5f8148777eff884b5c5b63165a115a16a2ddc2efee240c4a1b6f52def333e49.exe
  "C:\Users\Admin\AppData\Local\Temp\d5f8148777eff884b5c5b63165a115a16a2ddc2efee240c4a1b6f52def333e49.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2160
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\db646dbc-f9ba-45e2-9c08-0613913d8a3f" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2968
- - C:\Users\Admin\AppData\Local\Temp\d5f8148777eff884b5c5b63165a115a16a2ddc2efee240c4a1b6f52def333e49.exe
    "C:\Users\Admin\AppData\Local\Temp\d5f8148777eff884b5c5b63165a115a16a2ddc2efee240c4a1b6f52def333e49.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:3584
  - - C:\Users\Admin\AppData\Local\Temp\d5f8148777eff884b5c5b63165a115a16a2ddc2efee240c4a1b6f52def333e49.exe
      "C:\Users\Admin\AppData\Local\Temp\d5f8148777eff884b5c5b63165a115a16a2ddc2efee240c4a1b6f52def333e49.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:1160

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 129164308e702fdc66b08a3e37443c3538cb38d3f8a9ec9f2fc242809eb2f745
MD5 fb03526b897d572b399f3cba89305c9d
SHA1 8af3cc1409538d35897494cebe129fbd25de3bdb
SHA512 a91a001a7d0ef541fb2ee9e95a441a651a5555a9b2575872aaa5fe376fb80c60fbc67183a34d24291d1b255d6a216455e93c05b1533a2c235bea40d947e96c09
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 e7f1b0fbb17ceb1825a1cff7abbd7d0ebe6642934a3d7e4b7a12785b32efa475
MD5 703ae19a063e97e8443ad1f389396260
SHA1 a7a7763842cfebe29c4359daaf0a7f551158992e
SHA512 ae530e161981058636bae847308de33f32ae76d70b4eb0f671c35f570c1800cac27dbb06c98714e5b18fc8c7d9e6cd4f0cdc82cb361209ddf143e23c06f84343
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 fc313f967018367673c781334fa4b12859b905fb8d71567ea697ad20ebf116d0
MD5 834b13417b158177bb7cfda7eda63569
SHA1 d8e8191d5610491d7c8da6877cffa3e2f58d38dc
SHA512 e524a9b9633cb04c206ff6cda4d78a8cff3231e3cabba0e2f5a9228a7d6f1e2f40bcd82249142f9b7015c473fe9a9feeb316a3c85cecd10ac79853c84e83940d
MD5 SHA1 SHA512

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d5f8148777eff884b5c5b63165a115a16a2ddc2efee240c4a1b6f52def333e49.exe

Path C:\Users\Admin\AppData\Local\db646dbc-f9ba-45e2-9c08-0613913d8a3f\d5f8148777eff884b5c5b63165a115a16a2ddc2efee240c4a1b6f52def333e49.exe
Size 817KB
SHA256 d5f8148777eff884b5c5b63165a115a16a2ddc2efee240c4a1b6f52def333e49
MD5 2e4811e11a4e3ad828f16e4852e9c86b
SHA1 7c5dc4fa3319a0cc7a36b45ddb7ebcd3e5dac7c4
SHA512 d630a8325cb31daf72f38efa1123a4bf067e3018746ff63715befe3885ba26734fd4b156649550d587b49add2f27b90c026da29c7ebafbcd9d8fc32754868c51
SSDEEP 12288:x+UCyoJs8IPtySPACDm+RJhjZM5GGFMF50NAQYjoUi:qRsvPtyBCLThjZMIRUd4o
MD5 SHA1 SHA512 SSDEEP

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memory/1160-31-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1160-41-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1160-40-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1160-23-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1160-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1160-39-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1160-25-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1160-38-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1160-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1160-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1160-30-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2160-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2160-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2160-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2160-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2160-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3584-34-0x0000000000400000-0x0000000001A97000-memory.dmp

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memory/3584-24-0x0000000000400000-0x0000000001A97000-memory.dmp

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memory/4660-2-0x0000000003840000-0x000000000395B000-memory.dmp

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memory/4660-1-0x00000000037A0000-0x000000000383C000-memory.dmp

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