djvu | 2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c

General

Target

2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe
Size

731KB
MD5

abba24cfeef402d2b9db9cea29dcf221
SHA1

afb51f68e598dabe9498ab188fe7e9f18cbdd55c
SHA256

2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c
SHA512

84f28ef097dafc383a0e684d4778c32ed283ad065b5dc738b476ce8347790dfcbacd122b027d86a9215fd8ba51f0d2bb19992d8cc6e394d0b911d4bcd94b1477
SSDEEP

12288:ZQtf7gatsRpXFfuKDCEKG39MPy7uE9sKxLT7nnNlJHZZKphu7h+i5ZhQ7ObVqqkj:ZQUTVfxe3mbuKb9T7nNlJHZZqh2pJW/P

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

http://cajgtus.com/test2/get.php

Attributes

extension
.vehu
offline_id
EGfa5svnSGFJka7LZBQoqff0QtO1IpTauoDvGvt1
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/33b490a613f49fa190924f199d2c079e20240512191214/caaf73 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: 0872PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 17 IoCs

resource	yara_rule
behavioral2/memory/2932-2-0x00000000025B0000-0x00000000026CB000-memory.dmp	family_djvu
behavioral2/memory/2304-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2304-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2304-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2304-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2304-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1648-26-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1648-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1648-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1648-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1648-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1648-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1648-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1648-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1648-39-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1648-40-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1648-41-0x0000000000400000-0x0000000000537000-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
2976	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-1-5-21-1230210488-3096403634-4129516247-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\4b4e42dd-4b40-40cf-aa1e-56e97e107e1d\\2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe\" --AutoStart"	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.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
2	api.2ip.ua
8	api.2ip.ua
1	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2932 set thread context of 2304	2932	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe	78
PID 3700 set thread context of 1648	3700	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe	83

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
2304	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe
2304	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe
1648	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe
1648	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2932 wrote to memory of 2304	2932	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe	78
PID 2932 wrote to memory of 2304	2932	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe	78
PID 2932 wrote to memory of 2304	2932	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe	78
PID 2932 wrote to memory of 2304	2932	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe	78
PID 2932 wrote to memory of 2304	2932	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe	78
PID 2932 wrote to memory of 2304	2932	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe	78
PID 2932 wrote to memory of 2304	2932	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe	78
PID 2932 wrote to memory of 2304	2932	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe	78
PID 2932 wrote to memory of 2304	2932	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe	78
PID 2932 wrote to memory of 2304	2932	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe	78
PID 2304 wrote to memory of 2976	2304	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe	79
PID 2304 wrote to memory of 2976	2304	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe	79
PID 2304 wrote to memory of 2976	2304	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe	79
PID 2304 wrote to memory of 3700	2304	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe	80
PID 2304 wrote to memory of 3700	2304	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe	80
PID 2304 wrote to memory of 3700	2304	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe	80
PID 3700 wrote to memory of 1648	3700	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe	83
PID 3700 wrote to memory of 1648	3700	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe	83
PID 3700 wrote to memory of 1648	3700	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe	83
PID 3700 wrote to memory of 1648	3700	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe	83
PID 3700 wrote to memory of 1648	3700	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe	83
PID 3700 wrote to memory of 1648	3700	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe	83
PID 3700 wrote to memory of 1648	3700	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe	83
PID 3700 wrote to memory of 1648	3700	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe	83
PID 3700 wrote to memory of 1648	3700	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe	83
PID 3700 wrote to memory of 1648	3700	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe	83

C:\Users\Admin\AppData\Local\Temp\2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe
"C:\Users\Admin\AppData\Local\Temp\2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2932
- C:\Users\Admin\AppData\Local\Temp\2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe
  "C:\Users\Admin\AppData\Local\Temp\2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2304
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\4b4e42dd-4b40-40cf-aa1e-56e97e107e1d" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2976
- - C:\Users\Admin\AppData\Local\Temp\2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe
    "C:\Users\Admin\AppData\Local\Temp\2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:3700
  - - C:\Users\Admin\AppData\Local\Temp\2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe
      "C:\Users\Admin\AppData\Local\Temp\2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:1648

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

File and Directory Permissions Modification

Modify Registry

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Filesize
1KB

MD5
84721cd35068ddfc92aa0a4c829fbd2a

SHA1
71d7e227e0f3fcbb585598d0f3757a8935b748ce

SHA256
bf8250097eb58e963c7cd636093d2a332647af517ad22ddebe1765703b8dd199

SHA512
f08b89715c28ae36927316d6fca1716dbd9e935edf9d7e979586c4e4610fc29c83514e2385dbf43e7227f8275603c5cbd85c2a098be6ada95aee1a24c5e23dfc

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Filesize
724B

MD5
8202a1cd02e7d69597995cabbe881a12

SHA1
8858d9d934b7aa9330ee73de6c476acf19929ff6

SHA256
58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5

SHA512
97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Filesize
410B

MD5
ce5a5c8889881fc62b80042cdfbae018

SHA1
e16d4141c363adafa05e21e3c6e949f88575471b

SHA256
7ee0881603a6fe029702ca4d7c1131df9219423b533a1bad5cc217ff0fa5a3b3

SHA512
299314b65ed40ea38c7e77c6394da17e9cf77ca975b74db4975fb65f08986613d2e9cbc5b402f892e7fe82113a305cfa885e7f1197c3bacf9d79b61f7a325498

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Filesize
392B

MD5
261961fc22eb249a966fa48ac7b70783

SHA1
88e85aa18cae42ec712a1faa1fd6d08e90140716

SHA256
e01ac95fca3b0259f099229935e94ab01f22e498d216de553acadbc1c0b09731

SHA512
14ba056845deaf392d3d03e3f606546cfa0ea9ed0994e9cb10a639814da991adf103b14691cc230f13d02d2ce14347752634aef1e66884eb99c775502461d329

Download Submit
C:\Users\Admin\AppData\Local\4b4e42dd-4b40-40cf-aa1e-56e97e107e1d\2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe

Filesize
731KB

MD5
abba24cfeef402d2b9db9cea29dcf221

SHA1
afb51f68e598dabe9498ab188fe7e9f18cbdd55c

SHA256
2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c

SHA512
84f28ef097dafc383a0e684d4778c32ed283ad065b5dc738b476ce8347790dfcbacd122b027d86a9215fd8ba51f0d2bb19992d8cc6e394d0b911d4bcd94b1477

Download Submit
memory/1648-23-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1648-31-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1648-41-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1648-40-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1648-26-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1648-39-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1648-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1648-36-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1648-38-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1648-33-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1648-32-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2304-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2304-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2304-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2304-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2304-19-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2932-2-0x00000000025B0000-0x00000000026CB000-memory.dmp

Filesize
1.1MB

Download
memory/2932-1-0x0000000002510000-0x00000000025A6000-memory.dmp

Filesize
600KB

Download
memory/3700-25-0x0000000000400000-0x000000000080E000-memory.dmp

Filesize
4.1MB

Download
memory/3700-24-0x0000000000400000-0x000000000080E000-memory.dmp

Filesize
4.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads