djvu | ceaa430730feeaf2255a16a648d4de39f20c4014d4c6aaa17a6169f556bcb69a

Analysis

max time kernel
142s
max time network
126s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
29/05/2024, 23:13

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General

Target
ceaa430730feeaf2255a16a648d4de39f20c4014d4c6aaa17a6169f556bcb69a.exe
Size 790KB
Sample240529-27menaee28
SHA256 ceaa430730feeaf2255a16a648d4de39f20c4014d4c6aaa17a6169f556bcb69a
MD5 a01ec21a4fd6c96e882ee7bcfac637b2
SHA1 09b890f50dd0e4ca5da1e881c68a686530b2b1d6
SHA512 9329dbf604f51b3a11f9fa7e4f9d8f64b89ab682cf347ca07a44f7ff8f54243482171da5f314d99e3e97390b81618191ee8dde2693f0698bd5801b886f465a31
SSDEEP 24576:/YSFeqBdc0HdzP/maHmST090ycn5WsPR:mqBOWT/+eHI6
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/4872-2-0x0000000003D80000-0x0000000003E9B000-memory.dmp	family_djvu
behavioral2/memory/3456-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3456-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3456-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3456-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3456-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2720-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2720-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2720-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2720-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2720-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2720-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2720-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2720-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2720-39-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-711569230-3659488422-571408806-1000\Control Panel\International\Geo\Nation	ceaa430730feeaf2255a16a648d4de39f20c4014d4c6aaa17a6169f556bcb69a.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
4620	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-1-5-21-711569230-3659488422-571408806-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\e01a5030-f7b6-4087-85f6-164ff57026cb\\ceaa430730feeaf2255a16a648d4de39f20c4014d4c6aaa17a6169f556bcb69a.exe\" --AutoStart"	ceaa430730feeaf2255a16a648d4de39f20c4014d4c6aaa17a6169f556bcb69a.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
3	api.2ip.ua
4	api.2ip.ua
15	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4872 set thread context of 3456	4872	ceaa430730feeaf2255a16a648d4de39f20c4014d4c6aaa17a6169f556bcb69a.exe	81
PID 4464 set thread context of 2720	4464	ceaa430730feeaf2255a16a648d4de39f20c4014d4c6aaa17a6169f556bcb69a.exe	88

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
3456	ceaa430730feeaf2255a16a648d4de39f20c4014d4c6aaa17a6169f556bcb69a.exe
3456	ceaa430730feeaf2255a16a648d4de39f20c4014d4c6aaa17a6169f556bcb69a.exe
2720	ceaa430730feeaf2255a16a648d4de39f20c4014d4c6aaa17a6169f556bcb69a.exe
2720	ceaa430730feeaf2255a16a648d4de39f20c4014d4c6aaa17a6169f556bcb69a.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4872 wrote to memory of 3456	4872	ceaa430730feeaf2255a16a648d4de39f20c4014d4c6aaa17a6169f556bcb69a.exe	81
PID 4872 wrote to memory of 3456	4872	ceaa430730feeaf2255a16a648d4de39f20c4014d4c6aaa17a6169f556bcb69a.exe	81
PID 4872 wrote to memory of 3456	4872	ceaa430730feeaf2255a16a648d4de39f20c4014d4c6aaa17a6169f556bcb69a.exe	81
PID 4872 wrote to memory of 3456	4872	ceaa430730feeaf2255a16a648d4de39f20c4014d4c6aaa17a6169f556bcb69a.exe	81
PID 4872 wrote to memory of 3456	4872	ceaa430730feeaf2255a16a648d4de39f20c4014d4c6aaa17a6169f556bcb69a.exe	81
PID 4872 wrote to memory of 3456	4872	ceaa430730feeaf2255a16a648d4de39f20c4014d4c6aaa17a6169f556bcb69a.exe	81
PID 4872 wrote to memory of 3456	4872	ceaa430730feeaf2255a16a648d4de39f20c4014d4c6aaa17a6169f556bcb69a.exe	81
PID 4872 wrote to memory of 3456	4872	ceaa430730feeaf2255a16a648d4de39f20c4014d4c6aaa17a6169f556bcb69a.exe	81
PID 4872 wrote to memory of 3456	4872	ceaa430730feeaf2255a16a648d4de39f20c4014d4c6aaa17a6169f556bcb69a.exe	81
PID 4872 wrote to memory of 3456	4872	ceaa430730feeaf2255a16a648d4de39f20c4014d4c6aaa17a6169f556bcb69a.exe	81
PID 3456 wrote to memory of 4620	3456	ceaa430730feeaf2255a16a648d4de39f20c4014d4c6aaa17a6169f556bcb69a.exe	85
PID 3456 wrote to memory of 4620	3456	ceaa430730feeaf2255a16a648d4de39f20c4014d4c6aaa17a6169f556bcb69a.exe	85
PID 3456 wrote to memory of 4620	3456	ceaa430730feeaf2255a16a648d4de39f20c4014d4c6aaa17a6169f556bcb69a.exe	85
PID 3456 wrote to memory of 4464	3456	ceaa430730feeaf2255a16a648d4de39f20c4014d4c6aaa17a6169f556bcb69a.exe	86
PID 3456 wrote to memory of 4464	3456	ceaa430730feeaf2255a16a648d4de39f20c4014d4c6aaa17a6169f556bcb69a.exe	86
PID 3456 wrote to memory of 4464	3456	ceaa430730feeaf2255a16a648d4de39f20c4014d4c6aaa17a6169f556bcb69a.exe	86
PID 4464 wrote to memory of 2720	4464	ceaa430730feeaf2255a16a648d4de39f20c4014d4c6aaa17a6169f556bcb69a.exe	88
PID 4464 wrote to memory of 2720	4464	ceaa430730feeaf2255a16a648d4de39f20c4014d4c6aaa17a6169f556bcb69a.exe	88
PID 4464 wrote to memory of 2720	4464	ceaa430730feeaf2255a16a648d4de39f20c4014d4c6aaa17a6169f556bcb69a.exe	88
PID 4464 wrote to memory of 2720	4464	ceaa430730feeaf2255a16a648d4de39f20c4014d4c6aaa17a6169f556bcb69a.exe	88
PID 4464 wrote to memory of 2720	4464	ceaa430730feeaf2255a16a648d4de39f20c4014d4c6aaa17a6169f556bcb69a.exe	88
PID 4464 wrote to memory of 2720	4464	ceaa430730feeaf2255a16a648d4de39f20c4014d4c6aaa17a6169f556bcb69a.exe	88
PID 4464 wrote to memory of 2720	4464	ceaa430730feeaf2255a16a648d4de39f20c4014d4c6aaa17a6169f556bcb69a.exe	88
PID 4464 wrote to memory of 2720	4464	ceaa430730feeaf2255a16a648d4de39f20c4014d4c6aaa17a6169f556bcb69a.exe	88
PID 4464 wrote to memory of 2720	4464	ceaa430730feeaf2255a16a648d4de39f20c4014d4c6aaa17a6169f556bcb69a.exe	88
PID 4464 wrote to memory of 2720	4464	ceaa430730feeaf2255a16a648d4de39f20c4014d4c6aaa17a6169f556bcb69a.exe	88

C:\Users\Admin\AppData\Local\Temp\ceaa430730feeaf2255a16a648d4de39f20c4014d4c6aaa17a6169f556bcb69a.exe
"C:\Users\Admin\AppData\Local\Temp\ceaa430730feeaf2255a16a648d4de39f20c4014d4c6aaa17a6169f556bcb69a.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4872
- C:\Users\Admin\AppData\Local\Temp\ceaa430730feeaf2255a16a648d4de39f20c4014d4c6aaa17a6169f556bcb69a.exe
  "C:\Users\Admin\AppData\Local\Temp\ceaa430730feeaf2255a16a648d4de39f20c4014d4c6aaa17a6169f556bcb69a.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3456
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\e01a5030-f7b6-4087-85f6-164ff57026cb" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:4620
- - C:\Users\Admin\AppData\Local\Temp\ceaa430730feeaf2255a16a648d4de39f20c4014d4c6aaa17a6169f556bcb69a.exe
    "C:\Users\Admin\AppData\Local\Temp\ceaa430730feeaf2255a16a648d4de39f20c4014d4c6aaa17a6169f556bcb69a.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:4464
  - - C:\Users\Admin\AppData\Local\Temp\ceaa430730feeaf2255a16a648d4de39f20c4014d4c6aaa17a6169f556bcb69a.exe
      "C:\Users\Admin\AppData\Local\Temp\ceaa430730feeaf2255a16a648d4de39f20c4014d4c6aaa17a6169f556bcb69a.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2720

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

Query Registry

T1012

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 c419f082161c6938bfb7e7b721ffc2ce738fc24890e5044a370aa46b7f48c440
MD5 7accdd5ae68e7d4e5811a515b58f3e42
SHA1 a0dae23c3fb9029e0fb0c899a1d8b3c507fc3aad
SHA512 7e7e5ed2422b74c230ff1c5f3e855fc8efe4d6788041641f0d5f53d8150c7f8a94314ec8d1c660d8fac714367a8f17d1eac209ffec669a94aee4b8ba7e352594
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 3f4695377cfcfdacecb7ef2aba126f9e74c60615f6c8290e162cf08d941d2ce9
MD5 fa8e2ff6a07f1551450a958e14eaeba1
SHA1 a75b2adc4a18ed9a969d2aa7194c2a7bbaf19bc4
SHA512 3050e9560264454f47358fd15996483dffcccc1251c7537f1f2dc5c2f505670becf9aada8653fcb49e9f7ca4cd5bfb2fec68c73f945de5c9efe782017ef56248
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 4e01f8f3bd4c98cb71d3456ca91a7540a4840f1e310f793102fb8b32871fd598
MD5 0ef3c3a3aceed6ed426b588b38741fee
SHA1 e81e57588a5e6a1a5cfe38e8f8595bcce030ea8c
SHA512 3da08ab4ab6128d57ef23f380229617414b6f7f80a7a320d05743fe6448169f4f5146292cb35bdb6981c4c3e12d7049450d93579d543e243c7a20ebc8b6cbcca
MD5 SHA1 SHA512

Submit Download

ceaa430730feeaf2255a16a648d4de39f20c4014d4c6aaa17a6169f556bcb69a.exe

Path C:\Users\Admin\AppData\Local\e01a5030-f7b6-4087-85f6-164ff57026cb\ceaa430730feeaf2255a16a648d4de39f20c4014d4c6aaa17a6169f556bcb69a.exe
Size 790KB
SHA256 ceaa430730feeaf2255a16a648d4de39f20c4014d4c6aaa17a6169f556bcb69a
MD5 a01ec21a4fd6c96e882ee7bcfac637b2
SHA1 09b890f50dd0e4ca5da1e881c68a686530b2b1d6
SHA512 9329dbf604f51b3a11f9fa7e4f9d8f64b89ab682cf347ca07a44f7ff8f54243482171da5f314d99e3e97390b81618191ee8dde2693f0698bd5801b886f465a31
SSDEEP 24576:/YSFeqBdc0HdzP/maHmST090ycn5WsPR:mqBOWT/+eHI6
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/2720-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2720-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2720-30-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2720-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2720-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2720-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2720-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2720-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2720-39-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3456-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3456-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3456-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3456-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3456-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4464-27-0x0000000000400000-0x0000000002012000-memory.dmp

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memory/4464-37-0x0000000000400000-0x0000000002012000-memory.dmp

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memory/4872-1-0x00000000020F0000-0x000000000218E000-memory.dmp

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memory/4872-2-0x0000000003D80000-0x0000000003E9B000-memory.dmp

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