djvu | 35139f78bc8d51dbb8951e76928b9e9ace87ded22239f1f27b24a82651ec4a22

Analysis

max time kernel
143s
max time network
122s
platform
windows11-21h2_x64
resource
win11-20240419-en
resource tags

arch:x64arch:x86image:win11-20240419-enlocale:en-usos:windows11-21h2-x64system
submitted
22/05/2024, 09:30

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General

Target
35139f78bc8d51dbb8951e76928b9e9ace87ded22239f1f27b24a82651ec4a22.exe
Size 703KB
Sample240522-lgh2jsaf53
SHA256 35139f78bc8d51dbb8951e76928b9e9ace87ded22239f1f27b24a82651ec4a22
MD5 8d35c959439087a5afeb4102f8d9a537
SHA1 9db82f937ff4e3ef9881c0d72557418cee6fb9b3
SHA512 a7c49eca997c58bde5dc7e2edb53a310894f7fc17d4ff7e1c6ab9edf8927738d7143158eb71f7da60d5e268da3cb1f5066b90d514285f784b42f4417ff8dfefe
SSDEEP 12288:VGHSBXVfmazQuehq0vfn3XQTCLPjTlGzqJ8gyOt2PdeojBWat:VGueuVeo0oyPXiQPVUPwQBWa
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/4688-3-0x0000000004C60000-0x0000000004D7B000-memory.dmp	family_djvu
behavioral2/memory/4568-2-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4568-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4568-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4568-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4568-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1696-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1696-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1696-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1696-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1696-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1696-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1696-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1696-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1696-37-0x0000000000400000-0x0000000000537000-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
2792	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-1-5-21-1474490143-3221292397-4168103503-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\4eed920d-ea67-4d70-8acf-3f3541d59579\\35139f78bc8d51dbb8951e76928b9e9ace87ded22239f1f27b24a82651ec4a22.exe\" --AutoStart"	35139f78bc8d51dbb8951e76928b9e9ace87ded22239f1f27b24a82651ec4a22.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 4688 set thread context of 4568	4688	35139f78bc8d51dbb8951e76928b9e9ace87ded22239f1f27b24a82651ec4a22.exe	78
PID 772 set thread context of 1696	772	35139f78bc8d51dbb8951e76928b9e9ace87ded22239f1f27b24a82651ec4a22.exe	85

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
4568	35139f78bc8d51dbb8951e76928b9e9ace87ded22239f1f27b24a82651ec4a22.exe
4568	35139f78bc8d51dbb8951e76928b9e9ace87ded22239f1f27b24a82651ec4a22.exe
1696	35139f78bc8d51dbb8951e76928b9e9ace87ded22239f1f27b24a82651ec4a22.exe
1696	35139f78bc8d51dbb8951e76928b9e9ace87ded22239f1f27b24a82651ec4a22.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4688 wrote to memory of 4568	4688	35139f78bc8d51dbb8951e76928b9e9ace87ded22239f1f27b24a82651ec4a22.exe	78
PID 4688 wrote to memory of 4568	4688	35139f78bc8d51dbb8951e76928b9e9ace87ded22239f1f27b24a82651ec4a22.exe	78
PID 4688 wrote to memory of 4568	4688	35139f78bc8d51dbb8951e76928b9e9ace87ded22239f1f27b24a82651ec4a22.exe	78
PID 4688 wrote to memory of 4568	4688	35139f78bc8d51dbb8951e76928b9e9ace87ded22239f1f27b24a82651ec4a22.exe	78
PID 4688 wrote to memory of 4568	4688	35139f78bc8d51dbb8951e76928b9e9ace87ded22239f1f27b24a82651ec4a22.exe	78
PID 4688 wrote to memory of 4568	4688	35139f78bc8d51dbb8951e76928b9e9ace87ded22239f1f27b24a82651ec4a22.exe	78
PID 4688 wrote to memory of 4568	4688	35139f78bc8d51dbb8951e76928b9e9ace87ded22239f1f27b24a82651ec4a22.exe	78
PID 4688 wrote to memory of 4568	4688	35139f78bc8d51dbb8951e76928b9e9ace87ded22239f1f27b24a82651ec4a22.exe	78
PID 4688 wrote to memory of 4568	4688	35139f78bc8d51dbb8951e76928b9e9ace87ded22239f1f27b24a82651ec4a22.exe	78
PID 4688 wrote to memory of 4568	4688	35139f78bc8d51dbb8951e76928b9e9ace87ded22239f1f27b24a82651ec4a22.exe	78
PID 4568 wrote to memory of 2792	4568	35139f78bc8d51dbb8951e76928b9e9ace87ded22239f1f27b24a82651ec4a22.exe	80
PID 4568 wrote to memory of 2792	4568	35139f78bc8d51dbb8951e76928b9e9ace87ded22239f1f27b24a82651ec4a22.exe	80
PID 4568 wrote to memory of 2792	4568	35139f78bc8d51dbb8951e76928b9e9ace87ded22239f1f27b24a82651ec4a22.exe	80
PID 4568 wrote to memory of 772	4568	35139f78bc8d51dbb8951e76928b9e9ace87ded22239f1f27b24a82651ec4a22.exe	81
PID 4568 wrote to memory of 772	4568	35139f78bc8d51dbb8951e76928b9e9ace87ded22239f1f27b24a82651ec4a22.exe	81
PID 4568 wrote to memory of 772	4568	35139f78bc8d51dbb8951e76928b9e9ace87ded22239f1f27b24a82651ec4a22.exe	81
PID 772 wrote to memory of 1696	772	35139f78bc8d51dbb8951e76928b9e9ace87ded22239f1f27b24a82651ec4a22.exe	85
PID 772 wrote to memory of 1696	772	35139f78bc8d51dbb8951e76928b9e9ace87ded22239f1f27b24a82651ec4a22.exe	85
PID 772 wrote to memory of 1696	772	35139f78bc8d51dbb8951e76928b9e9ace87ded22239f1f27b24a82651ec4a22.exe	85
PID 772 wrote to memory of 1696	772	35139f78bc8d51dbb8951e76928b9e9ace87ded22239f1f27b24a82651ec4a22.exe	85
PID 772 wrote to memory of 1696	772	35139f78bc8d51dbb8951e76928b9e9ace87ded22239f1f27b24a82651ec4a22.exe	85
PID 772 wrote to memory of 1696	772	35139f78bc8d51dbb8951e76928b9e9ace87ded22239f1f27b24a82651ec4a22.exe	85
PID 772 wrote to memory of 1696	772	35139f78bc8d51dbb8951e76928b9e9ace87ded22239f1f27b24a82651ec4a22.exe	85
PID 772 wrote to memory of 1696	772	35139f78bc8d51dbb8951e76928b9e9ace87ded22239f1f27b24a82651ec4a22.exe	85
PID 772 wrote to memory of 1696	772	35139f78bc8d51dbb8951e76928b9e9ace87ded22239f1f27b24a82651ec4a22.exe	85
PID 772 wrote to memory of 1696	772	35139f78bc8d51dbb8951e76928b9e9ace87ded22239f1f27b24a82651ec4a22.exe	85

C:\Users\Admin\AppData\Local\Temp\35139f78bc8d51dbb8951e76928b9e9ace87ded22239f1f27b24a82651ec4a22.exe
"C:\Users\Admin\AppData\Local\Temp\35139f78bc8d51dbb8951e76928b9e9ace87ded22239f1f27b24a82651ec4a22.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4688
- C:\Users\Admin\AppData\Local\Temp\35139f78bc8d51dbb8951e76928b9e9ace87ded22239f1f27b24a82651ec4a22.exe
  "C:\Users\Admin\AppData\Local\Temp\35139f78bc8d51dbb8951e76928b9e9ace87ded22239f1f27b24a82651ec4a22.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4568
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\4eed920d-ea67-4d70-8acf-3f3541d59579" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2792
- - C:\Users\Admin\AppData\Local\Temp\35139f78bc8d51dbb8951e76928b9e9ace87ded22239f1f27b24a82651ec4a22.exe
    "C:\Users\Admin\AppData\Local\Temp\35139f78bc8d51dbb8951e76928b9e9ace87ded22239f1f27b24a82651ec4a22.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:772
  - - C:\Users\Admin\AppData\Local\Temp\35139f78bc8d51dbb8951e76928b9e9ace87ded22239f1f27b24a82651ec4a22.exe
      "C:\Users\Admin\AppData\Local\Temp\35139f78bc8d51dbb8951e76928b9e9ace87ded22239f1f27b24a82651ec4a22.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:1696

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 5c2e51ccf5767f80257a0a0bb66dee40957e5379431e15a118e7f1343ad1f6e0
MD5 195fc28150bef9b30510eed36fb325af
SHA1 1ea8a314d8af1d431b77d5280d1782e9a8e867c6
SHA512 537da7e46d8b5afc796c1908042088c583c5380fb729f3665845fe36286b3efeaec9fa26475e9c2263f55b1eca04bd7ae26088a9a85950b2b7f750fd24eadcfc
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 ba874824f09b6549ef9dcf2eade3e56c7a1c0f785e4cdcdbc9d480859201c329
MD5 af0fa387b9d38e203b3eefebf97b9d58
SHA1 96b9b2ab775d75cdf6cd8a516fea1712a51e0478
SHA512 64c041440057f9b367dfbd885339d9d1f0909c6c49d93aaf2597c6af6635e05ac4ca5513fbcd23c244d05adb3f532da7f04e5c677fbd00105f95fcbae69953bb
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 729434fb1d861404e258918db3db1bf7976bb84c558552dadc804004cf7aaf3e
MD5 156f206cb8a9d6d5bc25597f8cd77d49
SHA1 809565b0ad960893fa69582de66699affa1ff910
SHA512 b2662dfd4cf546b3ce78553643efe675268d5045ed0bca7d01f0b3c37456d7c608f614420d860059e71350f99fe5ba2332843cfcc66e8c75843d23d2621647fd
MD5 SHA1 SHA512

Submit Download

35139f78bc8d51dbb8951e76928b9e9ace87ded22239f1f27b24a82651ec4a22.exe

Path C:\Users\Admin\AppData\Local\4eed920d-ea67-4d70-8acf-3f3541d59579\35139f78bc8d51dbb8951e76928b9e9ace87ded22239f1f27b24a82651ec4a22.exe
Size 703KB
SHA256 35139f78bc8d51dbb8951e76928b9e9ace87ded22239f1f27b24a82651ec4a22
MD5 8d35c959439087a5afeb4102f8d9a537
SHA1 9db82f937ff4e3ef9881c0d72557418cee6fb9b3
SHA512 a7c49eca997c58bde5dc7e2edb53a310894f7fc17d4ff7e1c6ab9edf8927738d7143158eb71f7da60d5e268da3cb1f5066b90d514285f784b42f4417ff8dfefe
SSDEEP 12288:VGHSBXVfmazQuehq0vfn3XQTCLPjTlGzqJ8gyOt2PdeojBWat:VGueuVeo0oyPXiQPVUPwQBWa
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1696-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1696-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1696-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1696-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1696-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1696-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1696-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1696-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1696-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4568-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4568-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4568-2-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4568-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4568-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4688-3-0x0000000004C60000-0x0000000004D7B000-memory.dmp

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memory/4688-1-0x0000000004AC0000-0x0000000004B55000-memory.dmp

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