djvu | 90e55d23ab99b92a220f4d48cbd1910cb01ccaf29ccfdaefcc6d19cfca59225e

Analysis

max time kernel
146s
max time network
150s
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, 21:54

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General

Target
90e55d23ab99b92a220f4d48cbd1910cb01ccaf29ccfdaefcc6d19cfca59225e.exe
Size 750KB
Sample240425-1sbtyafe81
SHA256 90e55d23ab99b92a220f4d48cbd1910cb01ccaf29ccfdaefcc6d19cfca59225e
MD5 37e6ce9e2239ea8f0d7808c864056743
SHA1 717d58fecedf782ce4cbd703a40742d3c99f85ff
SHA512 c562111987d7dbef264b1e74bbedd7cc0b4726a74139842fceac3512706cf04ff8368fcd99ef3df6821a57f1abb50159114084fd7729891ad2e51571da5919cb
SSDEEP 12288:FdebNu7sPQhTsv1WSB1y4rB25Kyjju6Ye39dtLHerY789KRolEHC:F0EOygv0SjVyjee39dtMzk+lEi
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/1640-2-0x0000000004BA0000-0x0000000004CBB000-memory.dmp	family_djvu
behavioral2/memory/4108-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4108-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4108-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4108-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4108-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2092-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2092-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2092-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2092-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2092-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2092-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2092-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2092-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2092-39-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2092-40-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2092-41-0x0000000000400000-0x0000000000537000-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
1752	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-1-5-21-3777591257-2471171023-3629228286-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\c737e927-ec65-475a-bd47-6be181728279\\90e55d23ab99b92a220f4d48cbd1910cb01ccaf29ccfdaefcc6d19cfca59225e.exe\" --AutoStart"	90e55d23ab99b92a220f4d48cbd1910cb01ccaf29ccfdaefcc6d19cfca59225e.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
10	api.2ip.ua
22	api.2ip.ua
2	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1640 set thread context of 4108	1640	90e55d23ab99b92a220f4d48cbd1910cb01ccaf29ccfdaefcc6d19cfca59225e.exe	81
PID 3396 set thread context of 2092	3396	90e55d23ab99b92a220f4d48cbd1910cb01ccaf29ccfdaefcc6d19cfca59225e.exe	87

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
4108	90e55d23ab99b92a220f4d48cbd1910cb01ccaf29ccfdaefcc6d19cfca59225e.exe
4108	90e55d23ab99b92a220f4d48cbd1910cb01ccaf29ccfdaefcc6d19cfca59225e.exe
2092	90e55d23ab99b92a220f4d48cbd1910cb01ccaf29ccfdaefcc6d19cfca59225e.exe
2092	90e55d23ab99b92a220f4d48cbd1910cb01ccaf29ccfdaefcc6d19cfca59225e.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1640 wrote to memory of 4108	1640	90e55d23ab99b92a220f4d48cbd1910cb01ccaf29ccfdaefcc6d19cfca59225e.exe	81
PID 1640 wrote to memory of 4108	1640	90e55d23ab99b92a220f4d48cbd1910cb01ccaf29ccfdaefcc6d19cfca59225e.exe	81
PID 1640 wrote to memory of 4108	1640	90e55d23ab99b92a220f4d48cbd1910cb01ccaf29ccfdaefcc6d19cfca59225e.exe	81
PID 1640 wrote to memory of 4108	1640	90e55d23ab99b92a220f4d48cbd1910cb01ccaf29ccfdaefcc6d19cfca59225e.exe	81
PID 1640 wrote to memory of 4108	1640	90e55d23ab99b92a220f4d48cbd1910cb01ccaf29ccfdaefcc6d19cfca59225e.exe	81
PID 1640 wrote to memory of 4108	1640	90e55d23ab99b92a220f4d48cbd1910cb01ccaf29ccfdaefcc6d19cfca59225e.exe	81
PID 1640 wrote to memory of 4108	1640	90e55d23ab99b92a220f4d48cbd1910cb01ccaf29ccfdaefcc6d19cfca59225e.exe	81
PID 1640 wrote to memory of 4108	1640	90e55d23ab99b92a220f4d48cbd1910cb01ccaf29ccfdaefcc6d19cfca59225e.exe	81
PID 1640 wrote to memory of 4108	1640	90e55d23ab99b92a220f4d48cbd1910cb01ccaf29ccfdaefcc6d19cfca59225e.exe	81
PID 1640 wrote to memory of 4108	1640	90e55d23ab99b92a220f4d48cbd1910cb01ccaf29ccfdaefcc6d19cfca59225e.exe	81
PID 4108 wrote to memory of 1752	4108	90e55d23ab99b92a220f4d48cbd1910cb01ccaf29ccfdaefcc6d19cfca59225e.exe	82
PID 4108 wrote to memory of 1752	4108	90e55d23ab99b92a220f4d48cbd1910cb01ccaf29ccfdaefcc6d19cfca59225e.exe	82
PID 4108 wrote to memory of 1752	4108	90e55d23ab99b92a220f4d48cbd1910cb01ccaf29ccfdaefcc6d19cfca59225e.exe	82
PID 4108 wrote to memory of 3396	4108	90e55d23ab99b92a220f4d48cbd1910cb01ccaf29ccfdaefcc6d19cfca59225e.exe	83
PID 4108 wrote to memory of 3396	4108	90e55d23ab99b92a220f4d48cbd1910cb01ccaf29ccfdaefcc6d19cfca59225e.exe	83
PID 4108 wrote to memory of 3396	4108	90e55d23ab99b92a220f4d48cbd1910cb01ccaf29ccfdaefcc6d19cfca59225e.exe	83
PID 3396 wrote to memory of 2092	3396	90e55d23ab99b92a220f4d48cbd1910cb01ccaf29ccfdaefcc6d19cfca59225e.exe	87
PID 3396 wrote to memory of 2092	3396	90e55d23ab99b92a220f4d48cbd1910cb01ccaf29ccfdaefcc6d19cfca59225e.exe	87
PID 3396 wrote to memory of 2092	3396	90e55d23ab99b92a220f4d48cbd1910cb01ccaf29ccfdaefcc6d19cfca59225e.exe	87
PID 3396 wrote to memory of 2092	3396	90e55d23ab99b92a220f4d48cbd1910cb01ccaf29ccfdaefcc6d19cfca59225e.exe	87
PID 3396 wrote to memory of 2092	3396	90e55d23ab99b92a220f4d48cbd1910cb01ccaf29ccfdaefcc6d19cfca59225e.exe	87
PID 3396 wrote to memory of 2092	3396	90e55d23ab99b92a220f4d48cbd1910cb01ccaf29ccfdaefcc6d19cfca59225e.exe	87
PID 3396 wrote to memory of 2092	3396	90e55d23ab99b92a220f4d48cbd1910cb01ccaf29ccfdaefcc6d19cfca59225e.exe	87
PID 3396 wrote to memory of 2092	3396	90e55d23ab99b92a220f4d48cbd1910cb01ccaf29ccfdaefcc6d19cfca59225e.exe	87
PID 3396 wrote to memory of 2092	3396	90e55d23ab99b92a220f4d48cbd1910cb01ccaf29ccfdaefcc6d19cfca59225e.exe	87
PID 3396 wrote to memory of 2092	3396	90e55d23ab99b92a220f4d48cbd1910cb01ccaf29ccfdaefcc6d19cfca59225e.exe	87

C:\Users\Admin\AppData\Local\Temp\90e55d23ab99b92a220f4d48cbd1910cb01ccaf29ccfdaefcc6d19cfca59225e.exe
"C:\Users\Admin\AppData\Local\Temp\90e55d23ab99b92a220f4d48cbd1910cb01ccaf29ccfdaefcc6d19cfca59225e.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1640
- C:\Users\Admin\AppData\Local\Temp\90e55d23ab99b92a220f4d48cbd1910cb01ccaf29ccfdaefcc6d19cfca59225e.exe
  "C:\Users\Admin\AppData\Local\Temp\90e55d23ab99b92a220f4d48cbd1910cb01ccaf29ccfdaefcc6d19cfca59225e.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4108
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\c737e927-ec65-475a-bd47-6be181728279" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:1752
- - C:\Users\Admin\AppData\Local\Temp\90e55d23ab99b92a220f4d48cbd1910cb01ccaf29ccfdaefcc6d19cfca59225e.exe
    "C:\Users\Admin\AppData\Local\Temp\90e55d23ab99b92a220f4d48cbd1910cb01ccaf29ccfdaefcc6d19cfca59225e.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:3396
  - - C:\Users\Admin\AppData\Local\Temp\90e55d23ab99b92a220f4d48cbd1910cb01ccaf29ccfdaefcc6d19cfca59225e.exe
      "C:\Users\Admin\AppData\Local\Temp\90e55d23ab99b92a220f4d48cbd1910cb01ccaf29ccfdaefcc6d19cfca59225e.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2092

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 4e3ee32076baf8538d9b9473169229647c419aa92f4bef71fb12fb714ac4e77d
MD5 4ec20346a7b5dd75cfde7b15df208cf0
SHA1 517b437fc42dfc6e2f0d055dc678a0c080d47a0b
SHA512 dff871a49c68eebb57eb5d21c197c5f47adc2444edde5f9da25c35a91519747cdb07aae26adfebcf0e48409f45ed8e040ec1c777910942aa7c18268bc6bcd7d1
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 276a8347c69bc0e34570e4be3a8c4ed46c87e2b2df7a3ae1f4fcbf2960955054
MD5 4956756e77ef9ec2ae46611468b3bda7
SHA1 e5f4251adbe7f6f689ee0357a0f923ff001a7eca
SHA512 aee6b40fcdb453f77a1eed67f954e3a0c2fed40640faa0e938c1218614a92536b3e66acdc53dd2cebd439cacc3f807e1ea9e6f914b3f4b9bedd7bdc89bf43b4d
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 d3da858e218aec93546d1b9d6247a93e2dd2e89eac4a98893c8b058e507c77c4
MD5 f2fdb34d95038e5941359f46fdd1532f
SHA1 3924afae051f332103c46b612bf5c0f8096a84a1
SHA512 1c2de6baee99fd853628cce7ba83e8073582bad8c96e5e67366eb4d23879d06bd67ea428561f228a88e87c1220919bfb4091f2a06964a89acf01316c93a0a27a
MD5 SHA1 SHA512

Submit Download

90e55d23ab99b92a220f4d48cbd1910cb01ccaf29ccfdaefcc6d19cfca59225e.exe

Path C:\Users\Admin\AppData\Local\c737e927-ec65-475a-bd47-6be181728279\90e55d23ab99b92a220f4d48cbd1910cb01ccaf29ccfdaefcc6d19cfca59225e.exe
Size 750KB
SHA256 90e55d23ab99b92a220f4d48cbd1910cb01ccaf29ccfdaefcc6d19cfca59225e
MD5 37e6ce9e2239ea8f0d7808c864056743
SHA1 717d58fecedf782ce4cbd703a40742d3c99f85ff
SHA512 c562111987d7dbef264b1e74bbedd7cc0b4726a74139842fceac3512706cf04ff8368fcd99ef3df6821a57f1abb50159114084fd7729891ad2e51571da5919cb
SSDEEP 12288:FdebNu7sPQhTsv1WSB1y4rB25Kyjju6Ye39dtLHerY789KRolEHC:F0EOygv0SjVyjee39dtMzk+lEi
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1640-2-0x0000000004BA0000-0x0000000004CBB000-memory.dmp

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memory/1640-1-0x0000000003220000-0x00000000032B8000-memory.dmp

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memory/2092-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2092-38-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2092-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2092-23-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2092-24-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2092-41-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2092-40-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2092-39-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2092-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2092-31-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2092-33-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3396-20-0x0000000003220000-0x00000000032B3000-memory.dmp

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memory/4108-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4108-17-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4108-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4108-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4108-5-0x0000000000400000-0x0000000000537000-memory.dmp

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