djvu | 2f3067c39a804348f02fa46648ed1b45ec7ec1f3ddd88864d5c0036a759cfde6

Analysis

max time kernel
149s
max time network
152s
platform
windows11-21h2_x64
resource
win11-20240508-en
resource tags

arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
submitted
24/05/2024, 12:50

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General

Target
2f3067c39a804348f02fa46648ed1b45ec7ec1f3ddd88864d5c0036a759cfde6.exe
Size 717KB
Sample240524-p27gesdd4t
SHA256 2f3067c39a804348f02fa46648ed1b45ec7ec1f3ddd88864d5c0036a759cfde6
MD5 998e1670883e3e9d433a90cdd0e02a96
SHA1 4a9403464a4d77cf795405a2042fad3cf9b5efc9
SHA512 f1fcf42ae1eea0fe3ea884e60b6fead65733104c0f32a59c7d379c5640095672751e1da40c46ef643bb9dc6a8f4cf7c6eed729f69317223d6580175a69e5a010
SSDEEP 12288:MT9N16kz7cmBCnXj96fH/Ppno1MUKP6p5t5VqQDbAyEeiHdI:MT9NYoKR6fp1PeDyCMyxi
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/4292-2-0x0000000004AC0000-0x0000000004BDB000-memory.dmp	family_djvu
behavioral2/memory/3120-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3120-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3120-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3120-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3120-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4908-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4908-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4908-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4908-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4908-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4908-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4908-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4908-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4908-37-0x0000000000400000-0x0000000000537000-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
3000	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-1-5-21-3107365284-1576850094-161165143-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\24972096-c838-4c3b-892f-e3d8b4f909c7\\2f3067c39a804348f02fa46648ed1b45ec7ec1f3ddd88864d5c0036a759cfde6.exe\" --AutoStart"	2f3067c39a804348f02fa46648ed1b45ec7ec1f3ddd88864d5c0036a759cfde6.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 4292 set thread context of 3120	4292	2f3067c39a804348f02fa46648ed1b45ec7ec1f3ddd88864d5c0036a759cfde6.exe	78
PID 1776 set thread context of 4908	1776	2f3067c39a804348f02fa46648ed1b45ec7ec1f3ddd88864d5c0036a759cfde6.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
3120	2f3067c39a804348f02fa46648ed1b45ec7ec1f3ddd88864d5c0036a759cfde6.exe
3120	2f3067c39a804348f02fa46648ed1b45ec7ec1f3ddd88864d5c0036a759cfde6.exe
4908	2f3067c39a804348f02fa46648ed1b45ec7ec1f3ddd88864d5c0036a759cfde6.exe
4908	2f3067c39a804348f02fa46648ed1b45ec7ec1f3ddd88864d5c0036a759cfde6.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4292 wrote to memory of 3120	4292	2f3067c39a804348f02fa46648ed1b45ec7ec1f3ddd88864d5c0036a759cfde6.exe	78
PID 4292 wrote to memory of 3120	4292	2f3067c39a804348f02fa46648ed1b45ec7ec1f3ddd88864d5c0036a759cfde6.exe	78
PID 4292 wrote to memory of 3120	4292	2f3067c39a804348f02fa46648ed1b45ec7ec1f3ddd88864d5c0036a759cfde6.exe	78
PID 4292 wrote to memory of 3120	4292	2f3067c39a804348f02fa46648ed1b45ec7ec1f3ddd88864d5c0036a759cfde6.exe	78
PID 4292 wrote to memory of 3120	4292	2f3067c39a804348f02fa46648ed1b45ec7ec1f3ddd88864d5c0036a759cfde6.exe	78
PID 4292 wrote to memory of 3120	4292	2f3067c39a804348f02fa46648ed1b45ec7ec1f3ddd88864d5c0036a759cfde6.exe	78
PID 4292 wrote to memory of 3120	4292	2f3067c39a804348f02fa46648ed1b45ec7ec1f3ddd88864d5c0036a759cfde6.exe	78
PID 4292 wrote to memory of 3120	4292	2f3067c39a804348f02fa46648ed1b45ec7ec1f3ddd88864d5c0036a759cfde6.exe	78
PID 4292 wrote to memory of 3120	4292	2f3067c39a804348f02fa46648ed1b45ec7ec1f3ddd88864d5c0036a759cfde6.exe	78
PID 4292 wrote to memory of 3120	4292	2f3067c39a804348f02fa46648ed1b45ec7ec1f3ddd88864d5c0036a759cfde6.exe	78
PID 3120 wrote to memory of 3000	3120	2f3067c39a804348f02fa46648ed1b45ec7ec1f3ddd88864d5c0036a759cfde6.exe	79
PID 3120 wrote to memory of 3000	3120	2f3067c39a804348f02fa46648ed1b45ec7ec1f3ddd88864d5c0036a759cfde6.exe	79
PID 3120 wrote to memory of 3000	3120	2f3067c39a804348f02fa46648ed1b45ec7ec1f3ddd88864d5c0036a759cfde6.exe	79
PID 3120 wrote to memory of 1776	3120	2f3067c39a804348f02fa46648ed1b45ec7ec1f3ddd88864d5c0036a759cfde6.exe	80
PID 3120 wrote to memory of 1776	3120	2f3067c39a804348f02fa46648ed1b45ec7ec1f3ddd88864d5c0036a759cfde6.exe	80
PID 3120 wrote to memory of 1776	3120	2f3067c39a804348f02fa46648ed1b45ec7ec1f3ddd88864d5c0036a759cfde6.exe	80
PID 1776 wrote to memory of 4908	1776	2f3067c39a804348f02fa46648ed1b45ec7ec1f3ddd88864d5c0036a759cfde6.exe	83
PID 1776 wrote to memory of 4908	1776	2f3067c39a804348f02fa46648ed1b45ec7ec1f3ddd88864d5c0036a759cfde6.exe	83
PID 1776 wrote to memory of 4908	1776	2f3067c39a804348f02fa46648ed1b45ec7ec1f3ddd88864d5c0036a759cfde6.exe	83
PID 1776 wrote to memory of 4908	1776	2f3067c39a804348f02fa46648ed1b45ec7ec1f3ddd88864d5c0036a759cfde6.exe	83
PID 1776 wrote to memory of 4908	1776	2f3067c39a804348f02fa46648ed1b45ec7ec1f3ddd88864d5c0036a759cfde6.exe	83
PID 1776 wrote to memory of 4908	1776	2f3067c39a804348f02fa46648ed1b45ec7ec1f3ddd88864d5c0036a759cfde6.exe	83
PID 1776 wrote to memory of 4908	1776	2f3067c39a804348f02fa46648ed1b45ec7ec1f3ddd88864d5c0036a759cfde6.exe	83
PID 1776 wrote to memory of 4908	1776	2f3067c39a804348f02fa46648ed1b45ec7ec1f3ddd88864d5c0036a759cfde6.exe	83
PID 1776 wrote to memory of 4908	1776	2f3067c39a804348f02fa46648ed1b45ec7ec1f3ddd88864d5c0036a759cfde6.exe	83
PID 1776 wrote to memory of 4908	1776	2f3067c39a804348f02fa46648ed1b45ec7ec1f3ddd88864d5c0036a759cfde6.exe	83

C:\Users\Admin\AppData\Local\Temp\2f3067c39a804348f02fa46648ed1b45ec7ec1f3ddd88864d5c0036a759cfde6.exe
"C:\Users\Admin\AppData\Local\Temp\2f3067c39a804348f02fa46648ed1b45ec7ec1f3ddd88864d5c0036a759cfde6.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4292
- C:\Users\Admin\AppData\Local\Temp\2f3067c39a804348f02fa46648ed1b45ec7ec1f3ddd88864d5c0036a759cfde6.exe
  "C:\Users\Admin\AppData\Local\Temp\2f3067c39a804348f02fa46648ed1b45ec7ec1f3ddd88864d5c0036a759cfde6.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3120
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\24972096-c838-4c3b-892f-e3d8b4f909c7" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:3000
- - C:\Users\Admin\AppData\Local\Temp\2f3067c39a804348f02fa46648ed1b45ec7ec1f3ddd88864d5c0036a759cfde6.exe
    "C:\Users\Admin\AppData\Local\Temp\2f3067c39a804348f02fa46648ed1b45ec7ec1f3ddd88864d5c0036a759cfde6.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:1776
  - - C:\Users\Admin\AppData\Local\Temp\2f3067c39a804348f02fa46648ed1b45ec7ec1f3ddd88864d5c0036a759cfde6.exe
      "C:\Users\Admin\AppData\Local\Temp\2f3067c39a804348f02fa46648ed1b45ec7ec1f3ddd88864d5c0036a759cfde6.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:4908

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 42397d9f3c8164d4cef19fc169d7bcea77a3ea7e9bcb8cfa7db2ff0bbd3a7e00
MD5 7bb5a14437331aad24915a3d8546fbc1
SHA1 9a5570c07af0c0cde02858f61e1c7094f5a70f38
SHA512 a2333a078be981eafe3f666ff3944cd3b28279a9da99f354014d81d80e98a0effabff2a8f5ab5fba61f7de9e49e2af3112dda6b28678192a1d80d2ca22004f13
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 7baeee49bebb42e4570e237982d0131caaa06fca5830cbe6f6d8cb102c8762e7
MD5 173b5c69b064a88e89c23e7f99d5bee7
SHA1 e245cda4c190694a6fed132c3e09b01cf4e1a230
SHA512 5f9eda35551c5385a36bfaa198e63670190c8079dd34e58b2a312480d899256250227701b1ce442defaf98ad89a80ed30021b6e4b9446e2946f24f06fba7492a
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 84475b25ec539378b7b125f7f8f2d5c49afbea7e7ce92c7fde033b33ded1bc66
MD5 fcf3fb986a2bdf0cb5980c1c998b749a
SHA1 c1cf5f0ca723641c728627f7b0671db46b29616e
SHA512 b199cec9d3ed9e1a8310c5addac7faef152897a06d39d646d9ad1c72235fd5cea914a236f4aaa2eca748d12cc9d6891da3032a8b30f584b9f23f8b63bea45b58
MD5 SHA1 SHA512

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2f3067c39a804348f02fa46648ed1b45ec7ec1f3ddd88864d5c0036a759cfde6.exe

Path C:\Users\Admin\AppData\Local\24972096-c838-4c3b-892f-e3d8b4f909c7\2f3067c39a804348f02fa46648ed1b45ec7ec1f3ddd88864d5c0036a759cfde6.exe
Size 717KB
SHA256 2f3067c39a804348f02fa46648ed1b45ec7ec1f3ddd88864d5c0036a759cfde6
MD5 998e1670883e3e9d433a90cdd0e02a96
SHA1 4a9403464a4d77cf795405a2042fad3cf9b5efc9
SHA512 f1fcf42ae1eea0fe3ea884e60b6fead65733104c0f32a59c7d379c5640095672751e1da40c46ef643bb9dc6a8f4cf7c6eed729f69317223d6580175a69e5a010
SSDEEP 12288:MT9N16kz7cmBCnXj96fH/Ppno1MUKP6p5t5VqQDbAyEeiHdI:MT9NYoKR6fp1PeDyCMyxi
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/3120-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3120-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3120-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3120-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3120-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4292-2-0x0000000004AC0000-0x0000000004BDB000-memory.dmp

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memory/4292-1-0x0000000004A20000-0x0000000004ABC000-memory.dmp

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memory/4908-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4908-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4908-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4908-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4908-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4908-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4908-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4908-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4908-37-0x0000000000400000-0x0000000000537000-memory.dmp

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