djvu | b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba

Analysis

max time kernel
290s
max time network
252s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
submitted
02/05/2024, 22:27

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe
Size 790KB
Sample240502-2c2k4agc4x
SHA256 b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba
MD5 6cfe2406e455d36d811044995c2fbc6f
SHA1 4990445095184c656d0221d77815e221a0e1ce76
SHA512 f1528e12f1ad559053a52616531b0a1388577b6ba97fefdbbed34bc8bc245f6788053dacf001e2607e1173ef85eef23ebd3f5f72b68f4a74c5ed9b34410ee1b9
SSDEEP 12288:YzB2L9gHLT7eWDKcwxZLvqdgj1LbW8RUp5LZ9eIDMS3shf:9xi7bK7Lu8OZ5KiMhh
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 14 IoCs

resource	yara_rule
behavioral2/memory/2752-2-0x0000000003100000-0x000000000321B000-memory.dmp	family_djvu
behavioral2/memory/4244-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4244-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4244-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4244-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4244-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2644-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2644-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2644-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2644-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2644-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2644-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2644-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2644-36-0x0000000000400000-0x0000000000537000-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
4988	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-1-5-21-3699363923-1875576828-3287151903-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\a0c1fa10-fd83-4d8d-81ed-411cf657a5ea\\b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe\" --AutoStart"	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.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
3	api.2ip.ua
12	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2752 set thread context of 4244	2752	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	73
PID 924 set thread context of 2644	924	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	77

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
4244	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe
4244	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe
2644	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe
2644	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2752 wrote to memory of 4244	2752	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	73
PID 2752 wrote to memory of 4244	2752	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	73
PID 2752 wrote to memory of 4244	2752	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	73
PID 2752 wrote to memory of 4244	2752	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	73
PID 2752 wrote to memory of 4244	2752	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	73
PID 2752 wrote to memory of 4244	2752	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	73
PID 2752 wrote to memory of 4244	2752	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	73
PID 2752 wrote to memory of 4244	2752	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	73
PID 2752 wrote to memory of 4244	2752	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	73
PID 2752 wrote to memory of 4244	2752	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	73
PID 4244 wrote to memory of 4988	4244	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	74
PID 4244 wrote to memory of 4988	4244	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	74
PID 4244 wrote to memory of 4988	4244	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	74
PID 4244 wrote to memory of 924	4244	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	75
PID 4244 wrote to memory of 924	4244	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	75
PID 4244 wrote to memory of 924	4244	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	75
PID 924 wrote to memory of 2644	924	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	77
PID 924 wrote to memory of 2644	924	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	77
PID 924 wrote to memory of 2644	924	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	77
PID 924 wrote to memory of 2644	924	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	77
PID 924 wrote to memory of 2644	924	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	77
PID 924 wrote to memory of 2644	924	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	77
PID 924 wrote to memory of 2644	924	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	77
PID 924 wrote to memory of 2644	924	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	77
PID 924 wrote to memory of 2644	924	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	77
PID 924 wrote to memory of 2644	924	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	77

C:\Users\Admin\AppData\Local\Temp\b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe
"C:\Users\Admin\AppData\Local\Temp\b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2752
- C:\Users\Admin\AppData\Local\Temp\b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe
  "C:\Users\Admin\AppData\Local\Temp\b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4244
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\a0c1fa10-fd83-4d8d-81ed-411cf657a5ea" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:4988
- - C:\Users\Admin\AppData\Local\Temp\b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe
    "C:\Users\Admin\AppData\Local\Temp\b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:924
  - - C:\Users\Admin\AppData\Local\Temp\b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe
      "C:\Users\Admin\AppData\Local\Temp\b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2644

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 a923caeac048416a4f6d16993cd0428c085e9e5704190cf6ec6263e25d363969
MD5 4c46ed5fedad016479cacc0840ef1dad
SHA1 6af64fdc9b149490ab4485fecaa374c07004bcc6
SHA512 cc64de7b08f3299973f1e05881284ffcd0ba9681b00aa65077d95670576e386ac5e8591867536b2a71addc22e41d545b075b180f30aa218a20691d65ec6f8ad8
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 1df5c59dc2eee1f4350a4ba344f3417273664afd21143004c6360a700c62c9c4
MD5 5265df8e2ea2de2e025e0ffdf892d8b9
SHA1 a8d2a6c7ea2f256bc2926aa9715c8dfe112645f8
SHA512 91c61e3b07c121dc97c24a3f3d87732a0532340c9596dc49318030d4d2974d6764d7040f421cf01c539d4ddc58b41771004d8264fe8fd63dfa014604dcae041a
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 83c3e6562b381ba630416ad96eca7d6e050275397b38d93884adcc9b14830fe3
MD5 17c879f16c79a154ce461475e3f88426
SHA1 00faa9ab81439fa42ef5b2ef47da60acb20fcea9
SHA512 4f4a083471361e3e3fcef08e3334fec5a73085749bc6f077c684f5678eddead6a0d2e26508b4d04305ff6b2690012f7e6cbfaabecac327d5001b8186ae951c25
MD5 SHA1 SHA512

Submit Download

b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe

Path C:\Users\Admin\AppData\Local\a0c1fa10-fd83-4d8d-81ed-411cf657a5ea\b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe
Size 790KB
SHA256 b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba
MD5 6cfe2406e455d36d811044995c2fbc6f
SHA1 4990445095184c656d0221d77815e221a0e1ce76
SHA512 f1528e12f1ad559053a52616531b0a1388577b6ba97fefdbbed34bc8bc245f6788053dacf001e2607e1173ef85eef23ebd3f5f72b68f4a74c5ed9b34410ee1b9
SSDEEP 12288:YzB2L9gHLT7eWDKcwxZLvqdgj1LbW8RUp5LZ9eIDMS3shf:9xi7bK7Lu8OZ5KiMhh
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/2644-29-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/2644-27-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/2644-36-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/2644-22-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/2644-32-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/2644-35-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/2644-34-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/2644-28-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/2752-1-0x0000000003060000-0x0000000003100000-memory.dmp

Download

memory/2752-2-0x0000000003100000-0x000000000321B000-memory.dmp

Download

memory/4244-6-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/4244-3-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/4244-4-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/4244-5-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/4244-19-0x0000000000400000-0x0000000000537000-memory.dmp

Download