djvu | 9139e3ac3e3b67dc6dd4623e6e2756626afb9d7f6ddf89716d1ba4595a7e4d28

Analysis

max time kernel
141s
max time network
129s
platform
windows11-21h2_x64
resource
win11-20240508-en
resource tags

arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
submitted
30/05/2024, 01:46

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General

Target
9139e3ac3e3b67dc6dd4623e6e2756626afb9d7f6ddf89716d1ba4595a7e4d28.exe
Size 790KB
Sample240530-b7a4hsab2x
SHA256 9139e3ac3e3b67dc6dd4623e6e2756626afb9d7f6ddf89716d1ba4595a7e4d28
MD5 114e377e1d454ee74aa24a612fb64009
SHA1 e1d9c062ab600aa4f24c77effeebdcb9249420cf
SHA512 1fbcae4d6c068ab59ead9632756310d7fa2f5ab685dbda5e5ec7a3bc840ee836fb33270701032d9e61ac4b1452ad7d823928ca801a8d3c053a223cf0276e55ee
SSDEEP 12288:Mni4YSFPTbYXhvf1uh9CWb/iUD4hBo12D1ttAjXPFh3WMTZlPzahtkRRT:WYSFPwXu9vb/TzauaMT/baYRR
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

http://cajgtus.com/test1/get.php

Attributes

extension
.vepi
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: 0871PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 15 IoCs

resource	yara_rule
behavioral2/memory/3564-2-0x0000000003DE0000-0x0000000003EFB000-memory.dmp	family_djvu
behavioral2/memory/2060-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2060-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2060-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2060-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2060-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1976-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1976-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1976-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1976-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1976-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1976-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1976-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1976-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1976-37-0x0000000000400000-0x0000000000537000-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
3860	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-1-5-21-3433428765-2473475212-4279855560-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\c37858b5-423b-408e-ab10-7f76afc967bb\\9139e3ac3e3b67dc6dd4623e6e2756626afb9d7f6ddf89716d1ba4595a7e4d28.exe\" --AutoStart"	9139e3ac3e3b67dc6dd4623e6e2756626afb9d7f6ddf89716d1ba4595a7e4d28.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
6	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3564 set thread context of 2060	3564	9139e3ac3e3b67dc6dd4623e6e2756626afb9d7f6ddf89716d1ba4595a7e4d28.exe	80
PID 2136 set thread context of 1976	2136	9139e3ac3e3b67dc6dd4623e6e2756626afb9d7f6ddf89716d1ba4595a7e4d28.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
2060	9139e3ac3e3b67dc6dd4623e6e2756626afb9d7f6ddf89716d1ba4595a7e4d28.exe
2060	9139e3ac3e3b67dc6dd4623e6e2756626afb9d7f6ddf89716d1ba4595a7e4d28.exe
1976	9139e3ac3e3b67dc6dd4623e6e2756626afb9d7f6ddf89716d1ba4595a7e4d28.exe
1976	9139e3ac3e3b67dc6dd4623e6e2756626afb9d7f6ddf89716d1ba4595a7e4d28.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3564 wrote to memory of 2060	3564	9139e3ac3e3b67dc6dd4623e6e2756626afb9d7f6ddf89716d1ba4595a7e4d28.exe	80
PID 3564 wrote to memory of 2060	3564	9139e3ac3e3b67dc6dd4623e6e2756626afb9d7f6ddf89716d1ba4595a7e4d28.exe	80
PID 3564 wrote to memory of 2060	3564	9139e3ac3e3b67dc6dd4623e6e2756626afb9d7f6ddf89716d1ba4595a7e4d28.exe	80
PID 3564 wrote to memory of 2060	3564	9139e3ac3e3b67dc6dd4623e6e2756626afb9d7f6ddf89716d1ba4595a7e4d28.exe	80
PID 3564 wrote to memory of 2060	3564	9139e3ac3e3b67dc6dd4623e6e2756626afb9d7f6ddf89716d1ba4595a7e4d28.exe	80
PID 3564 wrote to memory of 2060	3564	9139e3ac3e3b67dc6dd4623e6e2756626afb9d7f6ddf89716d1ba4595a7e4d28.exe	80
PID 3564 wrote to memory of 2060	3564	9139e3ac3e3b67dc6dd4623e6e2756626afb9d7f6ddf89716d1ba4595a7e4d28.exe	80
PID 3564 wrote to memory of 2060	3564	9139e3ac3e3b67dc6dd4623e6e2756626afb9d7f6ddf89716d1ba4595a7e4d28.exe	80
PID 3564 wrote to memory of 2060	3564	9139e3ac3e3b67dc6dd4623e6e2756626afb9d7f6ddf89716d1ba4595a7e4d28.exe	80
PID 3564 wrote to memory of 2060	3564	9139e3ac3e3b67dc6dd4623e6e2756626afb9d7f6ddf89716d1ba4595a7e4d28.exe	80
PID 2060 wrote to memory of 3860	2060	9139e3ac3e3b67dc6dd4623e6e2756626afb9d7f6ddf89716d1ba4595a7e4d28.exe	81
PID 2060 wrote to memory of 3860	2060	9139e3ac3e3b67dc6dd4623e6e2756626afb9d7f6ddf89716d1ba4595a7e4d28.exe	81
PID 2060 wrote to memory of 3860	2060	9139e3ac3e3b67dc6dd4623e6e2756626afb9d7f6ddf89716d1ba4595a7e4d28.exe	81
PID 2060 wrote to memory of 2136	2060	9139e3ac3e3b67dc6dd4623e6e2756626afb9d7f6ddf89716d1ba4595a7e4d28.exe	83
PID 2060 wrote to memory of 2136	2060	9139e3ac3e3b67dc6dd4623e6e2756626afb9d7f6ddf89716d1ba4595a7e4d28.exe	83
PID 2060 wrote to memory of 2136	2060	9139e3ac3e3b67dc6dd4623e6e2756626afb9d7f6ddf89716d1ba4595a7e4d28.exe	83
PID 2136 wrote to memory of 1976	2136	9139e3ac3e3b67dc6dd4623e6e2756626afb9d7f6ddf89716d1ba4595a7e4d28.exe	86
PID 2136 wrote to memory of 1976	2136	9139e3ac3e3b67dc6dd4623e6e2756626afb9d7f6ddf89716d1ba4595a7e4d28.exe	86
PID 2136 wrote to memory of 1976	2136	9139e3ac3e3b67dc6dd4623e6e2756626afb9d7f6ddf89716d1ba4595a7e4d28.exe	86
PID 2136 wrote to memory of 1976	2136	9139e3ac3e3b67dc6dd4623e6e2756626afb9d7f6ddf89716d1ba4595a7e4d28.exe	86
PID 2136 wrote to memory of 1976	2136	9139e3ac3e3b67dc6dd4623e6e2756626afb9d7f6ddf89716d1ba4595a7e4d28.exe	86
PID 2136 wrote to memory of 1976	2136	9139e3ac3e3b67dc6dd4623e6e2756626afb9d7f6ddf89716d1ba4595a7e4d28.exe	86
PID 2136 wrote to memory of 1976	2136	9139e3ac3e3b67dc6dd4623e6e2756626afb9d7f6ddf89716d1ba4595a7e4d28.exe	86
PID 2136 wrote to memory of 1976	2136	9139e3ac3e3b67dc6dd4623e6e2756626afb9d7f6ddf89716d1ba4595a7e4d28.exe	86
PID 2136 wrote to memory of 1976	2136	9139e3ac3e3b67dc6dd4623e6e2756626afb9d7f6ddf89716d1ba4595a7e4d28.exe	86
PID 2136 wrote to memory of 1976	2136	9139e3ac3e3b67dc6dd4623e6e2756626afb9d7f6ddf89716d1ba4595a7e4d28.exe	86

C:\Users\Admin\AppData\Local\Temp\9139e3ac3e3b67dc6dd4623e6e2756626afb9d7f6ddf89716d1ba4595a7e4d28.exe
"C:\Users\Admin\AppData\Local\Temp\9139e3ac3e3b67dc6dd4623e6e2756626afb9d7f6ddf89716d1ba4595a7e4d28.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3564
- C:\Users\Admin\AppData\Local\Temp\9139e3ac3e3b67dc6dd4623e6e2756626afb9d7f6ddf89716d1ba4595a7e4d28.exe
  "C:\Users\Admin\AppData\Local\Temp\9139e3ac3e3b67dc6dd4623e6e2756626afb9d7f6ddf89716d1ba4595a7e4d28.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2060
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\c37858b5-423b-408e-ab10-7f76afc967bb" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:3860
- - C:\Users\Admin\AppData\Local\Temp\9139e3ac3e3b67dc6dd4623e6e2756626afb9d7f6ddf89716d1ba4595a7e4d28.exe
    "C:\Users\Admin\AppData\Local\Temp\9139e3ac3e3b67dc6dd4623e6e2756626afb9d7f6ddf89716d1ba4595a7e4d28.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2136
  - - C:\Users\Admin\AppData\Local\Temp\9139e3ac3e3b67dc6dd4623e6e2756626afb9d7f6ddf89716d1ba4595a7e4d28.exe
      "C:\Users\Admin\AppData\Local\Temp\9139e3ac3e3b67dc6dd4623e6e2756626afb9d7f6ddf89716d1ba4595a7e4d28.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:1976

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 e398b27255350eb1740b6851d4ca1faabc2b8c5ddd8caa791a47fc15af730060
MD5 6b5dad23fd7edd2c9daf944abc5d5341
SHA1 63a720a1bd0d9e2ecf288f11529f00256970577d
SHA512 870f71e1f8724c984d51600080c43562303263c5ae4b9bf648fcf28909a88141a00db0e88b5ec52fc938c81ba78cb31a92a60792ff74b2369fdf10932d7e540c
MD5 SHA1 SHA512

Submit Download

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 d7a1dcb835ac194e12663cc6c7cfda6288a828780be29fbb4d572a7548a38ddc
MD5 eda375fc8d04556ab85ffb1511d52404
SHA1 8594b75e41e8f281cdb1e2f69bba93fa68cc5143
SHA512 5e81ad63a8c675338e36fdf0c9c013de29d6ef2f849db4912c8b776a52cdde742ac1e98adcb7ff6f06230b56dbd73ba3e67e6a04861530c4b147e6bcc6e52c8e
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 278c32f8a845a721ab7851f11d64dfdc2d123e115145b8cc6b4ca18273ed3d9e
MD5 4ed80e2f5fcda47a6c4f89ac42e06f9b
SHA1 ecc81191c2df1312a341d792d00a26567457daf5
SHA512 ae8c2472c72ffda8efb003497863f5b3dd02fdec5145bfe8da975129f7e69308610403aea08bd5c7d7361a798ef2745f7c6fcc183c3c1527b45be62962d9bf7b
MD5 SHA1 SHA512

Submit Download

9139e3ac3e3b67dc6dd4623e6e2756626afb9d7f6ddf89716d1ba4595a7e4d28.exe

Path C:\Users\Admin\AppData\Local\c37858b5-423b-408e-ab10-7f76afc967bb\9139e3ac3e3b67dc6dd4623e6e2756626afb9d7f6ddf89716d1ba4595a7e4d28.exe
Size 790KB
SHA256 9139e3ac3e3b67dc6dd4623e6e2756626afb9d7f6ddf89716d1ba4595a7e4d28
MD5 114e377e1d454ee74aa24a612fb64009
SHA1 e1d9c062ab600aa4f24c77effeebdcb9249420cf
SHA512 1fbcae4d6c068ab59ead9632756310d7fa2f5ab685dbda5e5ec7a3bc840ee836fb33270701032d9e61ac4b1452ad7d823928ca801a8d3c053a223cf0276e55ee
SSDEEP 12288:Mni4YSFPTbYXhvf1uh9CWb/iUD4hBo12D1ttAjXPFh3WMTZlPzahtkRRT:WYSFPwXu9vb/TzauaMT/baYRR
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1976-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1976-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1976-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1976-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1976-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1976-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1976-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1976-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1976-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2060-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2060-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2060-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2060-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2060-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3564-2-0x0000000003DE0000-0x0000000003EFB000-memory.dmp

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memory/3564-1-0x0000000002370000-0x0000000002409000-memory.dmp

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