djvu | 51e3e1227f74684eac874888e71276e7a5906975081645427a847280cacad4fa

Analysis

max time kernel
143s
max time network
125s
platform
windows11-21h2_x64
resource
win11-20240419-en
resource tags

arch:x64arch:x86image:win11-20240419-enlocale:en-usos:windows11-21h2-x64system
submitted
03/05/2024, 13:00

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General

Target
51e3e1227f74684eac874888e71276e7a5906975081645427a847280cacad4fa.exe
Size 809KB
Sample240503-p84dcaba64
SHA256 51e3e1227f74684eac874888e71276e7a5906975081645427a847280cacad4fa
MD5 d74bec87f88746011d332d054a4ea8dc
SHA1 9f1a9d22f962f27ef76e70a7f91e37e3dfcabf21
SHA512 2b542e0539715cf1954a7e065e75e07f18abc14234982526375c4a9498852224023764671de109ed51d62ab91069395857678cc6f5381194e45be51153444fb7
SSDEEP 12288:/slz7Y/pKocArEMA54gG+zHj39HYrfPuqkjpk2A1JtTjSkNebAJoEZGL6z:iY/pZZrEmQt4rXSWvX6jAa
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

http://cajgtus.com/test2/get.php

Attributes

extension
.bgzq
offline_id
Z6iwSvCoAt8T8K2ROxecuXHPNHv7eDyWrc8Ks7t1
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/54cdfd152fe98eedb628a1f4ddb7076420240421150208/403a27 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: 0864PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 17 IoCs

resource	yara_rule
behavioral2/memory/2360-2-0x0000000003860000-0x000000000397B000-memory.dmp	family_djvu
behavioral2/memory/4568-3-0x0000000000400000-0x0000000000537000-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/4052-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4052-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4052-25-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4052-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4052-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4052-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4052-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4052-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4052-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4052-39-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4052-41-0x0000000000400000-0x0000000000537000-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
2572	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-1-5-21-293923083-2364846840-4256557006-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\c2074cd5-9ae7-43ef-b943-0652c89bd75b\\51e3e1227f74684eac874888e71276e7a5906975081645427a847280cacad4fa.exe\" --AutoStart"	51e3e1227f74684eac874888e71276e7a5906975081645427a847280cacad4fa.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 2360 set thread context of 4568	2360	51e3e1227f74684eac874888e71276e7a5906975081645427a847280cacad4fa.exe	79
PID 2096 set thread context of 4052	2096	51e3e1227f74684eac874888e71276e7a5906975081645427a847280cacad4fa.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	51e3e1227f74684eac874888e71276e7a5906975081645427a847280cacad4fa.exe
4568	51e3e1227f74684eac874888e71276e7a5906975081645427a847280cacad4fa.exe
4052	51e3e1227f74684eac874888e71276e7a5906975081645427a847280cacad4fa.exe
4052	51e3e1227f74684eac874888e71276e7a5906975081645427a847280cacad4fa.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2360 wrote to memory of 4568	2360	51e3e1227f74684eac874888e71276e7a5906975081645427a847280cacad4fa.exe	79
PID 2360 wrote to memory of 4568	2360	51e3e1227f74684eac874888e71276e7a5906975081645427a847280cacad4fa.exe	79
PID 2360 wrote to memory of 4568	2360	51e3e1227f74684eac874888e71276e7a5906975081645427a847280cacad4fa.exe	79
PID 2360 wrote to memory of 4568	2360	51e3e1227f74684eac874888e71276e7a5906975081645427a847280cacad4fa.exe	79
PID 2360 wrote to memory of 4568	2360	51e3e1227f74684eac874888e71276e7a5906975081645427a847280cacad4fa.exe	79
PID 2360 wrote to memory of 4568	2360	51e3e1227f74684eac874888e71276e7a5906975081645427a847280cacad4fa.exe	79
PID 2360 wrote to memory of 4568	2360	51e3e1227f74684eac874888e71276e7a5906975081645427a847280cacad4fa.exe	79
PID 2360 wrote to memory of 4568	2360	51e3e1227f74684eac874888e71276e7a5906975081645427a847280cacad4fa.exe	79
PID 2360 wrote to memory of 4568	2360	51e3e1227f74684eac874888e71276e7a5906975081645427a847280cacad4fa.exe	79
PID 2360 wrote to memory of 4568	2360	51e3e1227f74684eac874888e71276e7a5906975081645427a847280cacad4fa.exe	79
PID 4568 wrote to memory of 2572	4568	51e3e1227f74684eac874888e71276e7a5906975081645427a847280cacad4fa.exe	81
PID 4568 wrote to memory of 2572	4568	51e3e1227f74684eac874888e71276e7a5906975081645427a847280cacad4fa.exe	81
PID 4568 wrote to memory of 2572	4568	51e3e1227f74684eac874888e71276e7a5906975081645427a847280cacad4fa.exe	81
PID 4568 wrote to memory of 2096	4568	51e3e1227f74684eac874888e71276e7a5906975081645427a847280cacad4fa.exe	82
PID 4568 wrote to memory of 2096	4568	51e3e1227f74684eac874888e71276e7a5906975081645427a847280cacad4fa.exe	82
PID 4568 wrote to memory of 2096	4568	51e3e1227f74684eac874888e71276e7a5906975081645427a847280cacad4fa.exe	82
PID 2096 wrote to memory of 4052	2096	51e3e1227f74684eac874888e71276e7a5906975081645427a847280cacad4fa.exe	85
PID 2096 wrote to memory of 4052	2096	51e3e1227f74684eac874888e71276e7a5906975081645427a847280cacad4fa.exe	85
PID 2096 wrote to memory of 4052	2096	51e3e1227f74684eac874888e71276e7a5906975081645427a847280cacad4fa.exe	85
PID 2096 wrote to memory of 4052	2096	51e3e1227f74684eac874888e71276e7a5906975081645427a847280cacad4fa.exe	85
PID 2096 wrote to memory of 4052	2096	51e3e1227f74684eac874888e71276e7a5906975081645427a847280cacad4fa.exe	85
PID 2096 wrote to memory of 4052	2096	51e3e1227f74684eac874888e71276e7a5906975081645427a847280cacad4fa.exe	85
PID 2096 wrote to memory of 4052	2096	51e3e1227f74684eac874888e71276e7a5906975081645427a847280cacad4fa.exe	85
PID 2096 wrote to memory of 4052	2096	51e3e1227f74684eac874888e71276e7a5906975081645427a847280cacad4fa.exe	85
PID 2096 wrote to memory of 4052	2096	51e3e1227f74684eac874888e71276e7a5906975081645427a847280cacad4fa.exe	85
PID 2096 wrote to memory of 4052	2096	51e3e1227f74684eac874888e71276e7a5906975081645427a847280cacad4fa.exe	85

C:\Users\Admin\AppData\Local\Temp\51e3e1227f74684eac874888e71276e7a5906975081645427a847280cacad4fa.exe
"C:\Users\Admin\AppData\Local\Temp\51e3e1227f74684eac874888e71276e7a5906975081645427a847280cacad4fa.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2360
- C:\Users\Admin\AppData\Local\Temp\51e3e1227f74684eac874888e71276e7a5906975081645427a847280cacad4fa.exe
  "C:\Users\Admin\AppData\Local\Temp\51e3e1227f74684eac874888e71276e7a5906975081645427a847280cacad4fa.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\c2074cd5-9ae7-43ef-b943-0652c89bd75b" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2572
- - C:\Users\Admin\AppData\Local\Temp\51e3e1227f74684eac874888e71276e7a5906975081645427a847280cacad4fa.exe
    "C:\Users\Admin\AppData\Local\Temp\51e3e1227f74684eac874888e71276e7a5906975081645427a847280cacad4fa.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2096
  - - C:\Users\Admin\AppData\Local\Temp\51e3e1227f74684eac874888e71276e7a5906975081645427a847280cacad4fa.exe
      "C:\Users\Admin\AppData\Local\Temp\51e3e1227f74684eac874888e71276e7a5906975081645427a847280cacad4fa.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:4052

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 129164308e702fdc66b08a3e37443c3538cb38d3f8a9ec9f2fc242809eb2f745
MD5 fb03526b897d572b399f3cba89305c9d
SHA1 8af3cc1409538d35897494cebe129fbd25de3bdb
SHA512 a91a001a7d0ef541fb2ee9e95a441a651a5555a9b2575872aaa5fe376fb80c60fbc67183a34d24291d1b255d6a216455e93c05b1533a2c235bea40d947e96c09
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 0f1f83279d9e1fafd0f9f179f6488406af3d85932d5610ef38484892d0db6639
MD5 9deea42b7a092b3c68a8a440a54c42b3
SHA1 b036e6ba0c56cfb808fed6b7009a33c85ad97f43
SHA512 b89938e6fe7240efc28a8cf3a889e9d8c4cd7e4eea213286ce33562963d100b8bf3402805a47ddc9d66261aa6b08ce24ead6bd32fc7d13cc17653d16c92a2223
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 1f40c8e0dc32a14ba501a6c2ac251510937e30f9c6522363991893895e58f500
MD5 c705c9aee6556f6514c4b76d068efb17
SHA1 53accd608499e2926621def8dfdcbbaf6f1a8c51
SHA512 bfe02776088546606e69af00f5d63c791eb8f9447edb88f1eed9aa56801dcdd24134d5a857132011f414fed8126faa1bb8ea45786589c7699d88475ec5c8da4d
MD5 SHA1 SHA512

Submit Download

51e3e1227f74684eac874888e71276e7a5906975081645427a847280cacad4fa.exe

Path C:\Users\Admin\AppData\Local\c2074cd5-9ae7-43ef-b943-0652c89bd75b\51e3e1227f74684eac874888e71276e7a5906975081645427a847280cacad4fa.exe
Size 809KB
SHA256 51e3e1227f74684eac874888e71276e7a5906975081645427a847280cacad4fa
MD5 d74bec87f88746011d332d054a4ea8dc
SHA1 9f1a9d22f962f27ef76e70a7f91e37e3dfcabf21
SHA512 2b542e0539715cf1954a7e065e75e07f18abc14234982526375c4a9498852224023764671de109ed51d62ab91069395857678cc6f5381194e45be51153444fb7
SSDEEP 12288:/slz7Y/pKocArEMA54gG+zHj39HYrfPuqkjpk2A1JtTjSkNebAJoEZGL6z:iY/pZZrEmQt4rXSWvX6jAa
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/2096-24-0x0000000000400000-0x0000000001A95000-memory.dmp

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memory/2096-34-0x0000000000400000-0x0000000001A95000-memory.dmp

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memory/2360-2-0x0000000003860000-0x000000000397B000-memory.dmp

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memory/2360-1-0x00000000037C0000-0x0000000003852000-memory.dmp

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memory/4052-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4052-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4052-25-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4052-41-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4052-39-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4052-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4052-38-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4052-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4052-31-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4052-30-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4052-23-0x0000000000400000-0x0000000000537000-memory.dmp

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

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

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memory/4568-3-0x0000000000400000-0x0000000000537000-memory.dmp

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

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

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