djvu | 797f227f17cff5636e8b1c93495e3aca37f1f923cb40c952eae843897b2de08b

Analysis

max time kernel
146s
max time network
153s
platform
windows11-21h2_x64
resource
win11-20240508-en
resource tags

arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
submitted
20/05/2024, 19:14

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
797f227f17cff5636e8b1c93495e3aca37f1f923cb40c952eae843897b2de08b.exe
Size 722KB
Sample240520-xxtc1add44
SHA256 797f227f17cff5636e8b1c93495e3aca37f1f923cb40c952eae843897b2de08b
MD5 9288f5610c9a2a096b762c0b67fc3649
SHA1 ef563cda4d6af9a26622a9f89416c3b7c5b63e56
SHA512 78d2d736ff6a2b4ce17920b5742c73c0492cf21b7dd179203f070f79cb28149c38902e1da73d06a1cc931f40e15eddc95b9b1cb06cb4244755b693ee4500cef9
SSDEEP 12288:KwVE42zOvwtLMG+9YLJeU4+3WYLM7STln5rI3S4GM:KkE4DwhDUYLEbAPrIC4z
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 17 IoCs

resource	yara_rule
behavioral2/memory/1120-4-0x0000000002350000-0x000000000246B000-memory.dmp	family_djvu
behavioral2/memory/1468-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1468-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1468-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1468-2-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1468-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4304-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4304-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4304-26-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4304-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4304-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4304-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4304-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4304-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4304-39-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4304-40-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4304-41-0x0000000000400000-0x0000000000537000-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
3720	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-1-5-21-2457560273-69882387-977367775-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\25a79279-293f-4e54-b9d1-45eb692007ec\\797f227f17cff5636e8b1c93495e3aca37f1f923cb40c952eae843897b2de08b.exe\" --AutoStart"	797f227f17cff5636e8b1c93495e3aca37f1f923cb40c952eae843897b2de08b.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 1120 set thread context of 1468	1120	797f227f17cff5636e8b1c93495e3aca37f1f923cb40c952eae843897b2de08b.exe	81
PID 3380 set thread context of 4304	3380	797f227f17cff5636e8b1c93495e3aca37f1f923cb40c952eae843897b2de08b.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
1468	797f227f17cff5636e8b1c93495e3aca37f1f923cb40c952eae843897b2de08b.exe
1468	797f227f17cff5636e8b1c93495e3aca37f1f923cb40c952eae843897b2de08b.exe
4304	797f227f17cff5636e8b1c93495e3aca37f1f923cb40c952eae843897b2de08b.exe
4304	797f227f17cff5636e8b1c93495e3aca37f1f923cb40c952eae843897b2de08b.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1120 wrote to memory of 1468	1120	797f227f17cff5636e8b1c93495e3aca37f1f923cb40c952eae843897b2de08b.exe	81
PID 1120 wrote to memory of 1468	1120	797f227f17cff5636e8b1c93495e3aca37f1f923cb40c952eae843897b2de08b.exe	81
PID 1120 wrote to memory of 1468	1120	797f227f17cff5636e8b1c93495e3aca37f1f923cb40c952eae843897b2de08b.exe	81
PID 1120 wrote to memory of 1468	1120	797f227f17cff5636e8b1c93495e3aca37f1f923cb40c952eae843897b2de08b.exe	81
PID 1120 wrote to memory of 1468	1120	797f227f17cff5636e8b1c93495e3aca37f1f923cb40c952eae843897b2de08b.exe	81
PID 1120 wrote to memory of 1468	1120	797f227f17cff5636e8b1c93495e3aca37f1f923cb40c952eae843897b2de08b.exe	81
PID 1120 wrote to memory of 1468	1120	797f227f17cff5636e8b1c93495e3aca37f1f923cb40c952eae843897b2de08b.exe	81
PID 1120 wrote to memory of 1468	1120	797f227f17cff5636e8b1c93495e3aca37f1f923cb40c952eae843897b2de08b.exe	81
PID 1120 wrote to memory of 1468	1120	797f227f17cff5636e8b1c93495e3aca37f1f923cb40c952eae843897b2de08b.exe	81
PID 1120 wrote to memory of 1468	1120	797f227f17cff5636e8b1c93495e3aca37f1f923cb40c952eae843897b2de08b.exe	81
PID 1468 wrote to memory of 3720	1468	797f227f17cff5636e8b1c93495e3aca37f1f923cb40c952eae843897b2de08b.exe	82
PID 1468 wrote to memory of 3720	1468	797f227f17cff5636e8b1c93495e3aca37f1f923cb40c952eae843897b2de08b.exe	82
PID 1468 wrote to memory of 3720	1468	797f227f17cff5636e8b1c93495e3aca37f1f923cb40c952eae843897b2de08b.exe	82
PID 1468 wrote to memory of 3380	1468	797f227f17cff5636e8b1c93495e3aca37f1f923cb40c952eae843897b2de08b.exe	83
PID 1468 wrote to memory of 3380	1468	797f227f17cff5636e8b1c93495e3aca37f1f923cb40c952eae843897b2de08b.exe	83
PID 1468 wrote to memory of 3380	1468	797f227f17cff5636e8b1c93495e3aca37f1f923cb40c952eae843897b2de08b.exe	83
PID 3380 wrote to memory of 4304	3380	797f227f17cff5636e8b1c93495e3aca37f1f923cb40c952eae843897b2de08b.exe	86
PID 3380 wrote to memory of 4304	3380	797f227f17cff5636e8b1c93495e3aca37f1f923cb40c952eae843897b2de08b.exe	86
PID 3380 wrote to memory of 4304	3380	797f227f17cff5636e8b1c93495e3aca37f1f923cb40c952eae843897b2de08b.exe	86
PID 3380 wrote to memory of 4304	3380	797f227f17cff5636e8b1c93495e3aca37f1f923cb40c952eae843897b2de08b.exe	86
PID 3380 wrote to memory of 4304	3380	797f227f17cff5636e8b1c93495e3aca37f1f923cb40c952eae843897b2de08b.exe	86
PID 3380 wrote to memory of 4304	3380	797f227f17cff5636e8b1c93495e3aca37f1f923cb40c952eae843897b2de08b.exe	86
PID 3380 wrote to memory of 4304	3380	797f227f17cff5636e8b1c93495e3aca37f1f923cb40c952eae843897b2de08b.exe	86
PID 3380 wrote to memory of 4304	3380	797f227f17cff5636e8b1c93495e3aca37f1f923cb40c952eae843897b2de08b.exe	86
PID 3380 wrote to memory of 4304	3380	797f227f17cff5636e8b1c93495e3aca37f1f923cb40c952eae843897b2de08b.exe	86
PID 3380 wrote to memory of 4304	3380	797f227f17cff5636e8b1c93495e3aca37f1f923cb40c952eae843897b2de08b.exe	86

C:\Users\Admin\AppData\Local\Temp\797f227f17cff5636e8b1c93495e3aca37f1f923cb40c952eae843897b2de08b.exe
"C:\Users\Admin\AppData\Local\Temp\797f227f17cff5636e8b1c93495e3aca37f1f923cb40c952eae843897b2de08b.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1120
- C:\Users\Admin\AppData\Local\Temp\797f227f17cff5636e8b1c93495e3aca37f1f923cb40c952eae843897b2de08b.exe
  "C:\Users\Admin\AppData\Local\Temp\797f227f17cff5636e8b1c93495e3aca37f1f923cb40c952eae843897b2de08b.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1468
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\25a79279-293f-4e54-b9d1-45eb692007ec" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:3720
- - C:\Users\Admin\AppData\Local\Temp\797f227f17cff5636e8b1c93495e3aca37f1f923cb40c952eae843897b2de08b.exe
    "C:\Users\Admin\AppData\Local\Temp\797f227f17cff5636e8b1c93495e3aca37f1f923cb40c952eae843897b2de08b.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:3380
  - - C:\Users\Admin\AppData\Local\Temp\797f227f17cff5636e8b1c93495e3aca37f1f923cb40c952eae843897b2de08b.exe
      "C:\Users\Admin\AppData\Local\Temp\797f227f17cff5636e8b1c93495e3aca37f1f923cb40c952eae843897b2de08b.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:4304

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

Loading Replay Monitor...

Downloads

24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 1KB
SHA256 104836bc45abba5fa0b04c6f65d9eb8c0d83faee20bbb2b515cc2474d5f109bb
MD5 2861063c0e5b4b97b9bceeff935fe681
SHA1 6a4bb48270c696cf111fc5c27206e84aec145f54
SHA512 c6f3ef2ece358d6cb29f7640e3b470295ffdad5229eb307378c71000999bca58ec698881aa2571c7fde0e50b0bc1c69a915996260f4618c27245b25b9c4a24b6
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 40978552353d0acfdcbf29c2eec201158eddceb37aa7e293492dddce737d32ba
MD5 2accc0f07becad53565defe480c18bff
SHA1 5b04cf9d65189b46cc23509f06afa19c5910a1c8
SHA512 375533633120251377d2a2d4b569a62a3e913c32d1d5b0d188d8cdd65a82e22a0596afc404fcbaf00f6bb657e3f1ad7d491eccc89d88d28f9413afafcd77e078
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 ac2a84900dd0aac04441346ad325839cf0687f8ee30c7cc5a75a5710259f84f6
MD5 49e761a4a5d8d41031c416ebedf0037d
SHA1 6e62f947a819e366e4ad48b3d297750d7c85c29c
SHA512 62340ee1a541f2cd7ac7175df53eae689680cb8abc0d15ff9f6c725272deab928be5cc9e19d90dd131d50ccca15e0078ba018fa026302d6e3b5aa9b31253d0fc
MD5 SHA1 SHA512

Submit Download

797f227f17cff5636e8b1c93495e3aca37f1f923cb40c952eae843897b2de08b.exe

Path C:\Users\Admin\AppData\Local\25a79279-293f-4e54-b9d1-45eb692007ec\797f227f17cff5636e8b1c93495e3aca37f1f923cb40c952eae843897b2de08b.exe
Size 722KB
SHA256 797f227f17cff5636e8b1c93495e3aca37f1f923cb40c952eae843897b2de08b
MD5 9288f5610c9a2a096b762c0b67fc3649
SHA1 ef563cda4d6af9a26622a9f89416c3b7c5b63e56
SHA512 78d2d736ff6a2b4ce17920b5742c73c0492cf21b7dd179203f070f79cb28149c38902e1da73d06a1cc931f40e15eddc95b9b1cb06cb4244755b693ee4500cef9
SSDEEP 12288:KwVE42zOvwtLMG+9YLJeU4+3WYLM7STln5rI3S4GM:KkE4DwhDUYLEbAPrIC4z
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1120-1-0x0000000002290000-0x0000000002330000-memory.dmp

Download

memory/1120-4-0x0000000002350000-0x000000000246B000-memory.dmp

Download

memory/1468-5-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/1468-6-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/1468-3-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/1468-2-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/1468-19-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/3380-25-0x0000000000400000-0x00000000004FE000-memory.dmp

Download

memory/3380-21-0x0000000000400000-0x00000000004FE000-memory.dmp

Download

memory/4304-26-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/4304-24-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/4304-23-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/4304-31-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/4304-32-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/4304-33-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/4304-36-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/4304-38-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/4304-39-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/4304-40-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/4304-41-0x0000000000400000-0x0000000000537000-memory.dmp

Download