djvu | 455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2

Analysis

max time kernel
293s
max time network
188s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
submitted
25/04/2024, 02:02

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General

Target
455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe
Size 831KB
Sample240425-cgf3hsdc77
SHA256 455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2
MD5 33bc5b92658baf8f7a4dfc35c9994250
SHA1 30e9143d9d0c8def9bd176663e62049356cd94c9
SHA512 11568d107f8a3de82001811acc0c71506b6e3631b5dd7fc1e62f5e71c7bc324b64b7c1902423cb1b2196c129b60571df189fd6a6516080de4ceeb42271a29136
SSDEEP 12288:RTipzPV+q9TaI+u/htKL1MoFzEKMQe+LfGR1l68u7E9:Rk/aZeh21wQTfa68u7Q
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 16 IoCs

resource	yara_rule
behavioral2/memory/2960-2-0x0000000005DB0000-0x0000000005ECB000-memory.dmp	family_djvu
behavioral2/memory/4964-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4964-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4964-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4964-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4964-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1504-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1504-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1504-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1504-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1504-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1504-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1504-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1504-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1504-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1504-38-0x0000000000400000-0x0000000000537000-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
912	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-1-5-21-873560699-1074803302-2326074425-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\9def0a87-8e3d-413f-8745-610ea52f4046\\455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe\" --AutoStart"	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.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
9	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2960 set thread context of 4964	2960	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	73
PID 2704 set thread context of 1504	2704	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	77

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
4964	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe
4964	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe
1504	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe
1504	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2960 wrote to memory of 4964	2960	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	73
PID 2960 wrote to memory of 4964	2960	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	73
PID 2960 wrote to memory of 4964	2960	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	73
PID 2960 wrote to memory of 4964	2960	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	73
PID 2960 wrote to memory of 4964	2960	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	73
PID 2960 wrote to memory of 4964	2960	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	73
PID 2960 wrote to memory of 4964	2960	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	73
PID 2960 wrote to memory of 4964	2960	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	73
PID 2960 wrote to memory of 4964	2960	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	73
PID 2960 wrote to memory of 4964	2960	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	73
PID 4964 wrote to memory of 912	4964	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	74
PID 4964 wrote to memory of 912	4964	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	74
PID 4964 wrote to memory of 912	4964	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	74
PID 4964 wrote to memory of 2704	4964	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	75
PID 4964 wrote to memory of 2704	4964	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	75
PID 4964 wrote to memory of 2704	4964	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	75
PID 2704 wrote to memory of 1504	2704	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	77
PID 2704 wrote to memory of 1504	2704	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	77
PID 2704 wrote to memory of 1504	2704	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	77
PID 2704 wrote to memory of 1504	2704	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	77
PID 2704 wrote to memory of 1504	2704	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	77
PID 2704 wrote to memory of 1504	2704	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	77
PID 2704 wrote to memory of 1504	2704	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	77
PID 2704 wrote to memory of 1504	2704	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	77
PID 2704 wrote to memory of 1504	2704	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	77
PID 2704 wrote to memory of 1504	2704	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	77

C:\Users\Admin\AppData\Local\Temp\455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe
"C:\Users\Admin\AppData\Local\Temp\455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2960
- C:\Users\Admin\AppData\Local\Temp\455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe
  "C:\Users\Admin\AppData\Local\Temp\455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4964
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\9def0a87-8e3d-413f-8745-610ea52f4046" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:912
- - C:\Users\Admin\AppData\Local\Temp\455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe
    "C:\Users\Admin\AppData\Local\Temp\455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2704
  - - C:\Users\Admin\AppData\Local\Temp\455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe
      "C:\Users\Admin\AppData\Local\Temp\455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:1504

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 a7760866eaf849b079815652f9dce9eb9ec7c599199bc65c7030ca9e2ed91c26
MD5 f8ed6292d6d2f9514668acec50849d17
SHA1 482745d97c48b32fd986e488d169ac4eb7edd737
SHA512 ebc265c4a27c4a1d14ef783b28f3cb0de9ca4f28795078c3d80bf2ec6574c4e8f3f3c7c68197b1ea6f037cb88268cfab99817660f442696167120bc6275cad4f
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 15617e230d6ea9855767e51ea77a5b5d5729464c3f8ef24ae269e2a6a32a0f5a
MD5 e1819ee2b18fbe8240be753ab49abec4
SHA1 5d4cc13226a48a0a466437c56e06be912c09d8ee
SHA512 5730dad87fb04bf7203363582934e683587d48f823e665075bb0ef74bfff0d428d823f750e9d3a2ed5b78e360d8f0b4a04191ea2c64eefc3c36c9a897392bc13
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 767637e2bb62126a731fa5a0b60d0110a7758c0d81f2349d2b244b729fd63601
MD5 0deb13211d8e14835154f6f1d50ba9a2
SHA1 9f0c08d069fecc564e6c65c2407007e08aa22905
SHA512 545ffa9c9dc7e3b82cc4886fd7609a4e59aaa1383d21e7d40d549d25589bdcace53cdd8959413e3b6a9270f66863012e0947d6b15e8c1fbd4398d3e967796718
MD5 SHA1 SHA512

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455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe

Path C:\Users\Admin\AppData\Local\9def0a87-8e3d-413f-8745-610ea52f4046\455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe
Size 831KB
SHA256 455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2
MD5 33bc5b92658baf8f7a4dfc35c9994250
SHA1 30e9143d9d0c8def9bd176663e62049356cd94c9
SHA512 11568d107f8a3de82001811acc0c71506b6e3631b5dd7fc1e62f5e71c7bc324b64b7c1902423cb1b2196c129b60571df189fd6a6516080de4ceeb42271a29136
SSDEEP 12288:RTipzPV+q9TaI+u/htKL1MoFzEKMQe+LfGR1l68u7E9:Rk/aZeh21wQTfa68u7Q
MD5 SHA1 SHA512 SSDEEP

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memory/1504-23-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1504-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1504-38-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1504-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1504-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1504-24-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1504-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1504-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1504-31-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1504-30-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2704-20-0x0000000004340000-0x00000000043DE000-memory.dmp

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memory/2960-1-0x00000000040C0000-0x0000000004154000-memory.dmp

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memory/2960-2-0x0000000005DB0000-0x0000000005ECB000-memory.dmp

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memory/4964-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4964-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4964-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4964-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4964-17-0x0000000000400000-0x0000000000537000-memory.dmp

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