djvu | b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba

Analysis

max time kernel
297s
max time network
299s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
submitted
05/05/2024, 22:54

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General

Target
b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe
Size 790KB
Sample240505-2vjs1agf3y
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/404-2-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/404-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2776-3-0x00000000049C0000-0x0000000004ADB000-memory.dmp	family_djvu
behavioral2/memory/404-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/404-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/404-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1840-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1840-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1840-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1840-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1840-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1840-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1840-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1840-36-0x0000000000400000-0x0000000000537000-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
1160	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-1-5-21-1739856679-3467441365-73334005-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\352b3b64-4078-48b8-8f69-4131ecc9c724\\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
2	api.2ip.ua
11	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2776 set thread context of 404	2776	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	72
PID 4088 set thread context of 1840	4088	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	76

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
404	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe
404	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe
1840	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe
1840	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2776 wrote to memory of 404	2776	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	72
PID 2776 wrote to memory of 404	2776	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	72
PID 2776 wrote to memory of 404	2776	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	72
PID 2776 wrote to memory of 404	2776	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	72
PID 2776 wrote to memory of 404	2776	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	72
PID 2776 wrote to memory of 404	2776	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	72
PID 2776 wrote to memory of 404	2776	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	72
PID 2776 wrote to memory of 404	2776	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	72
PID 2776 wrote to memory of 404	2776	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	72
PID 2776 wrote to memory of 404	2776	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	72
PID 404 wrote to memory of 1160	404	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	73
PID 404 wrote to memory of 1160	404	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	73
PID 404 wrote to memory of 1160	404	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	73
PID 404 wrote to memory of 4088	404	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	74
PID 404 wrote to memory of 4088	404	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	74
PID 404 wrote to memory of 4088	404	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	74
PID 4088 wrote to memory of 1840	4088	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	76
PID 4088 wrote to memory of 1840	4088	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	76
PID 4088 wrote to memory of 1840	4088	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	76
PID 4088 wrote to memory of 1840	4088	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	76
PID 4088 wrote to memory of 1840	4088	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	76
PID 4088 wrote to memory of 1840	4088	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	76
PID 4088 wrote to memory of 1840	4088	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	76
PID 4088 wrote to memory of 1840	4088	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	76
PID 4088 wrote to memory of 1840	4088	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	76
PID 4088 wrote to memory of 1840	4088	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	76

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:2776
- 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:404
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\352b3b64-4078-48b8-8f69-4131ecc9c724" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:1160
- - 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:4088
  - - C:\Users\Admin\AppData\Local\Temp\b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe
      "C:\Users\Admin\AppData\Local\Temp\b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:1840

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 e8569d7b34f8be2c39d098acfc395bde7c314d0ad55b1efefca52ebb3fd3c06a
MD5 aba874fc4f2284853fb8b79aadaeb991
SHA1 e5eafdcc5da8536f1d3a6d138466bb026c0704ad
SHA512 c97cc627ea538fcea4dcb5aefc497adb24c919046d5b6393fdc5c747511d23893d53c612579fadfb8338d6754fa12ba247b1a44a86b0802d075fc6cf2ebf1553
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 94760eec0519418c14208736f18013abe6bffebd0c63d017f40e730bf82dd292
MD5 e04fdd9655e83f4c23eaaf7dd50ce856
SHA1 c76a972549ebd043585c88914b92bd758931b1f1
SHA512 befb7d57994a6a5593aec20bef1cf0993f6645045adcbb4b81815dff0bfa7360e668f2c84097760ba25834ecd2b75dae15c5f746c7a3382071e074c0bb8db280
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 5f5465df74eacf71aff4844efcf48ecd8dc727835df4dd22b368c3cd4b1ce015
MD5 67fd63a6d575ba390d6c005fdd364de1
SHA1 9bcfb3530e036229837f015bfdcc4b6066377776
SHA512 cf2508e0c154d821281ce822723d8fe509c67914e259f67ad4d8b20d528499409e779d8ca2164e846884a1505b57200f96af6f494bdadcddea664bf8a6fd8e03
MD5 SHA1 SHA512

Submit Download

b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe

Path C:\Users\Admin\AppData\Local\352b3b64-4078-48b8-8f69-4131ecc9c724\b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe
Size 790KB
SHA256 b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba
MD5 6cfe2406e455d36d811044995c2fbc6f
SHA1 4990445095184c656d0221d77815e221a0e1ce76
SHA512 f1528e12f1ad559053a52616531b0a1388577b6ba97fefdbbed34bc8bc245f6788053dacf001e2607e1173ef85eef23ebd3f5f72b68f4a74c5ed9b34410ee1b9
SSDEEP 12288:YzB2L9gHLT7eWDKcwxZLvqdgj1LbW8RUp5LZ9eIDMS3shf:9xi7bK7Lu8OZ5KiMhh
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/404-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/404-2-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/404-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/404-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/404-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1840-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1840-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1840-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1840-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1840-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1840-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1840-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1840-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2776-3-0x00000000049C0000-0x0000000004ADB000-memory.dmp

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memory/2776-1-0x00000000030A0000-0x0000000003138000-memory.dmp

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