djvu | c129c6a4181608254be4c12230876dc7599f069859423690a03cdc6faa54ce32

Analysis

max time kernel
143s
max time network
123s
platform
windows11-21h2_x64
resource
win11-20240426-en
resource tags

arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
submitted
29/05/2024, 04:46

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General

Target
c129c6a4181608254be4c12230876dc7599f069859423690a03cdc6faa54ce32.exe
Size 810KB
Sample240529-fech4abg86
SHA256 c129c6a4181608254be4c12230876dc7599f069859423690a03cdc6faa54ce32
MD5 9060623837cb380cb91eea124ec36e64
SHA1 45294966e7274b1f9448a63210c9182767cc68e0
SHA512 895e81e204468776d92ae1e1993dcb5a40b78b4fe23dc42d8d29ceaba9636bcf38c55ea52e3477e575c0973a3d63477f09a9f758d07bfe9063aa801c8be886d4
SSDEEP 12288:86xyOASU7AndBpO3Vn/zJmbSye7fpDdzlVBy9sRk/6lJSVil5wMtPrRLmWVoCAaB:LuF0dIV/zJWGpxzlNq/6lJuAttLmzK
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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 15 IoCs

resource	yara_rule
behavioral2/memory/4728-2-0x0000000004B60000-0x0000000004C7B000-memory.dmp	family_djvu
behavioral2/memory/2940-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2940-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2940-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2940-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2940-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3548-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3548-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3548-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3548-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3548-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3548-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3548-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3548-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3548-37-0x0000000000400000-0x0000000000537000-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
2080	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-1-5-21-2551177587-3778486488-1329702901-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\8cde8c56-dcf3-49d4-b3a6-ed1a7b03b2e1\\c129c6a4181608254be4c12230876dc7599f069859423690a03cdc6faa54ce32.exe\" --AutoStart"	c129c6a4181608254be4c12230876dc7599f069859423690a03cdc6faa54ce32.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
8	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4728 set thread context of 2940	4728	c129c6a4181608254be4c12230876dc7599f069859423690a03cdc6faa54ce32.exe	78
PID 4416 set thread context of 3548	4416	c129c6a4181608254be4c12230876dc7599f069859423690a03cdc6faa54ce32.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
2940	c129c6a4181608254be4c12230876dc7599f069859423690a03cdc6faa54ce32.exe
2940	c129c6a4181608254be4c12230876dc7599f069859423690a03cdc6faa54ce32.exe
3548	c129c6a4181608254be4c12230876dc7599f069859423690a03cdc6faa54ce32.exe
3548	c129c6a4181608254be4c12230876dc7599f069859423690a03cdc6faa54ce32.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4728 wrote to memory of 2940	4728	c129c6a4181608254be4c12230876dc7599f069859423690a03cdc6faa54ce32.exe	78
PID 4728 wrote to memory of 2940	4728	c129c6a4181608254be4c12230876dc7599f069859423690a03cdc6faa54ce32.exe	78
PID 4728 wrote to memory of 2940	4728	c129c6a4181608254be4c12230876dc7599f069859423690a03cdc6faa54ce32.exe	78
PID 4728 wrote to memory of 2940	4728	c129c6a4181608254be4c12230876dc7599f069859423690a03cdc6faa54ce32.exe	78
PID 4728 wrote to memory of 2940	4728	c129c6a4181608254be4c12230876dc7599f069859423690a03cdc6faa54ce32.exe	78
PID 4728 wrote to memory of 2940	4728	c129c6a4181608254be4c12230876dc7599f069859423690a03cdc6faa54ce32.exe	78
PID 4728 wrote to memory of 2940	4728	c129c6a4181608254be4c12230876dc7599f069859423690a03cdc6faa54ce32.exe	78
PID 4728 wrote to memory of 2940	4728	c129c6a4181608254be4c12230876dc7599f069859423690a03cdc6faa54ce32.exe	78
PID 4728 wrote to memory of 2940	4728	c129c6a4181608254be4c12230876dc7599f069859423690a03cdc6faa54ce32.exe	78
PID 4728 wrote to memory of 2940	4728	c129c6a4181608254be4c12230876dc7599f069859423690a03cdc6faa54ce32.exe	78
PID 2940 wrote to memory of 2080	2940	c129c6a4181608254be4c12230876dc7599f069859423690a03cdc6faa54ce32.exe	79
PID 2940 wrote to memory of 2080	2940	c129c6a4181608254be4c12230876dc7599f069859423690a03cdc6faa54ce32.exe	79
PID 2940 wrote to memory of 2080	2940	c129c6a4181608254be4c12230876dc7599f069859423690a03cdc6faa54ce32.exe	79
PID 2940 wrote to memory of 4416	2940	c129c6a4181608254be4c12230876dc7599f069859423690a03cdc6faa54ce32.exe	80
PID 2940 wrote to memory of 4416	2940	c129c6a4181608254be4c12230876dc7599f069859423690a03cdc6faa54ce32.exe	80
PID 2940 wrote to memory of 4416	2940	c129c6a4181608254be4c12230876dc7599f069859423690a03cdc6faa54ce32.exe	80
PID 4416 wrote to memory of 3548	4416	c129c6a4181608254be4c12230876dc7599f069859423690a03cdc6faa54ce32.exe	83
PID 4416 wrote to memory of 3548	4416	c129c6a4181608254be4c12230876dc7599f069859423690a03cdc6faa54ce32.exe	83
PID 4416 wrote to memory of 3548	4416	c129c6a4181608254be4c12230876dc7599f069859423690a03cdc6faa54ce32.exe	83
PID 4416 wrote to memory of 3548	4416	c129c6a4181608254be4c12230876dc7599f069859423690a03cdc6faa54ce32.exe	83
PID 4416 wrote to memory of 3548	4416	c129c6a4181608254be4c12230876dc7599f069859423690a03cdc6faa54ce32.exe	83
PID 4416 wrote to memory of 3548	4416	c129c6a4181608254be4c12230876dc7599f069859423690a03cdc6faa54ce32.exe	83
PID 4416 wrote to memory of 3548	4416	c129c6a4181608254be4c12230876dc7599f069859423690a03cdc6faa54ce32.exe	83
PID 4416 wrote to memory of 3548	4416	c129c6a4181608254be4c12230876dc7599f069859423690a03cdc6faa54ce32.exe	83
PID 4416 wrote to memory of 3548	4416	c129c6a4181608254be4c12230876dc7599f069859423690a03cdc6faa54ce32.exe	83
PID 4416 wrote to memory of 3548	4416	c129c6a4181608254be4c12230876dc7599f069859423690a03cdc6faa54ce32.exe	83

C:\Users\Admin\AppData\Local\Temp\c129c6a4181608254be4c12230876dc7599f069859423690a03cdc6faa54ce32.exe
"C:\Users\Admin\AppData\Local\Temp\c129c6a4181608254be4c12230876dc7599f069859423690a03cdc6faa54ce32.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4728
- C:\Users\Admin\AppData\Local\Temp\c129c6a4181608254be4c12230876dc7599f069859423690a03cdc6faa54ce32.exe
  "C:\Users\Admin\AppData\Local\Temp\c129c6a4181608254be4c12230876dc7599f069859423690a03cdc6faa54ce32.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2940
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\8cde8c56-dcf3-49d4-b3a6-ed1a7b03b2e1" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2080
- - C:\Users\Admin\AppData\Local\Temp\c129c6a4181608254be4c12230876dc7599f069859423690a03cdc6faa54ce32.exe
    "C:\Users\Admin\AppData\Local\Temp\c129c6a4181608254be4c12230876dc7599f069859423690a03cdc6faa54ce32.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:4416
  - - C:\Users\Admin\AppData\Local\Temp\c129c6a4181608254be4c12230876dc7599f069859423690a03cdc6faa54ce32.exe
      "C:\Users\Admin\AppData\Local\Temp\c129c6a4181608254be4c12230876dc7599f069859423690a03cdc6faa54ce32.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:3548

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 f226294a247fb8da33cf1868a83ee262f7831305b86f5f3dd5805fbc9188d042
MD5 a5c01f337cdeb7cfea1fa9537953788a
SHA1 4a424c3abf07b4169648765cec1e1d3462edd3a7
SHA512 9e48d9738c65450423ae773856c4d708bbffb48e0b047cf2dec0504bf8becd0f75a95587efa94743525fb3e4f6364760a1cab755e91c0b59fd6c97714b143ede
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

Submit Download

24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 410B
SHA256 283c3c5a6d69b9a0f00361f3e231eb55eb74bc2a2f72ff526ff89816aacdf112
MD5 f212f84c7dca59a45e4a5a49b89b2f2a
SHA1 2e50075ab7473000341dbf9db469d06c2d7077e1
SHA512 7fc274ebdb55bb5e49c18ae6cf12aa52118d78c8f451bf4787fdff98b58545bc6b029119159f63328f2b096516b20015d75dfd7a6de25dd9d2d5e7cf0158dc5e
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 8239c51ad8486cd98c3541eea74c2e59c19d984569cda1a19f52180d19e8ff62
MD5 503798b8c3b5fa2c9b4e77ca5d7ff6d1
SHA1 d9caf062e261910ef3a78242ae086aa6608f236f
SHA512 a1b2c25c5167d9d68519566fb8f5f54604f01b79ffb105b113b2fa54278a841210d4e83e8b9fc7c0a9c8186b9b8d85026968a1062f19c93c8b85050dd02d2b06
MD5 SHA1 SHA512

Submit Download

c129c6a4181608254be4c12230876dc7599f069859423690a03cdc6faa54ce32.exe

Path C:\Users\Admin\AppData\Local\8cde8c56-dcf3-49d4-b3a6-ed1a7b03b2e1\c129c6a4181608254be4c12230876dc7599f069859423690a03cdc6faa54ce32.exe
Size 810KB
SHA256 c129c6a4181608254be4c12230876dc7599f069859423690a03cdc6faa54ce32
MD5 9060623837cb380cb91eea124ec36e64
SHA1 45294966e7274b1f9448a63210c9182767cc68e0
SHA512 895e81e204468776d92ae1e1993dcb5a40b78b4fe23dc42d8d29ceaba9636bcf38c55ea52e3477e575c0973a3d63477f09a9f758d07bfe9063aa801c8be886d4
SSDEEP 12288:86xyOASU7AndBpO3Vn/zJmbSye7fpDdzlVBy9sRk/6lJSVil5wMtPrRLmWVoCAaB:LuF0dIV/zJWGpxzlNq/6lJuAttLmzK
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/2940-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2940-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2940-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2940-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2940-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3548-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3548-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3548-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3548-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3548-33-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3548-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3548-31-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3548-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3548-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4728-2-0x0000000004B60000-0x0000000004C7B000-memory.dmp

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memory/4728-1-0x0000000004AC0000-0x0000000004B5A000-memory.dmp

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