djvu | 134a024e7f598986229e902a75f3c2b047dd4370c22e428c1768ca65715c84bc

Analysis

max time kernel
142s
max time network
125s
platform
windows11-21h2_x64
resource
win11-20240412-en
resource tags

arch:x64arch:x86image:win11-20240412-enlocale:en-usos:windows11-21h2-x64system
submitted
24/04/2024, 10:44

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General

Target
134a024e7f598986229e902a75f3c2b047dd4370c22e428c1768ca65715c84bc.exe
Size 761KB
Sample240424-msvedsha45
SHA256 134a024e7f598986229e902a75f3c2b047dd4370c22e428c1768ca65715c84bc
MD5 ba17be6ba4bced17f3fb9d48642e063c
SHA1 71fc2aa67a6e1a11547a621c27f42934e25a4a39
SHA512 d40aeb6782388ab3577cd1d4335d0dab306c68e2c9522b0abeae61f1004ad7159c385b870ba0c6bf7ea7fed7a049bf709011792c786b929fa30ff29b0d890219
SSDEEP 12288:JUU0WLpKZ7MSsAtj3CEJSNlPaPlK+NnPnXTrVE6HNDqvUrQ8gxPLG/464O:JD0ZOEwNlUvdXdE6rQxPLtO
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/248-2-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/248-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2760-3-0x00000000060A0000-0x00000000061BB000-memory.dmp	family_djvu
behavioral2/memory/248-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/248-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/248-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1988-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1988-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1988-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1988-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1988-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1988-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1988-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1988-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1988-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1988-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1988-39-0x0000000000400000-0x0000000000537000-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
4512	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-1-5-21-2718508534-2116753757-2794822388-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\f3699345-6460-4d27-88c2-c341465c23ff\\134a024e7f598986229e902a75f3c2b047dd4370c22e428c1768ca65715c84bc.exe\" --AutoStart"	134a024e7f598986229e902a75f3c2b047dd4370c22e428c1768ca65715c84bc.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 2760 set thread context of 248	2760	134a024e7f598986229e902a75f3c2b047dd4370c22e428c1768ca65715c84bc.exe	80
PID 4488 set thread context of 1988	4488	134a024e7f598986229e902a75f3c2b047dd4370c22e428c1768ca65715c84bc.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
248	134a024e7f598986229e902a75f3c2b047dd4370c22e428c1768ca65715c84bc.exe
248	134a024e7f598986229e902a75f3c2b047dd4370c22e428c1768ca65715c84bc.exe
1988	134a024e7f598986229e902a75f3c2b047dd4370c22e428c1768ca65715c84bc.exe
1988	134a024e7f598986229e902a75f3c2b047dd4370c22e428c1768ca65715c84bc.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2760 wrote to memory of 248	2760	134a024e7f598986229e902a75f3c2b047dd4370c22e428c1768ca65715c84bc.exe	80
PID 2760 wrote to memory of 248	2760	134a024e7f598986229e902a75f3c2b047dd4370c22e428c1768ca65715c84bc.exe	80
PID 2760 wrote to memory of 248	2760	134a024e7f598986229e902a75f3c2b047dd4370c22e428c1768ca65715c84bc.exe	80
PID 2760 wrote to memory of 248	2760	134a024e7f598986229e902a75f3c2b047dd4370c22e428c1768ca65715c84bc.exe	80
PID 2760 wrote to memory of 248	2760	134a024e7f598986229e902a75f3c2b047dd4370c22e428c1768ca65715c84bc.exe	80
PID 2760 wrote to memory of 248	2760	134a024e7f598986229e902a75f3c2b047dd4370c22e428c1768ca65715c84bc.exe	80
PID 2760 wrote to memory of 248	2760	134a024e7f598986229e902a75f3c2b047dd4370c22e428c1768ca65715c84bc.exe	80
PID 2760 wrote to memory of 248	2760	134a024e7f598986229e902a75f3c2b047dd4370c22e428c1768ca65715c84bc.exe	80
PID 2760 wrote to memory of 248	2760	134a024e7f598986229e902a75f3c2b047dd4370c22e428c1768ca65715c84bc.exe	80
PID 2760 wrote to memory of 248	2760	134a024e7f598986229e902a75f3c2b047dd4370c22e428c1768ca65715c84bc.exe	80
PID 248 wrote to memory of 4512	248	134a024e7f598986229e902a75f3c2b047dd4370c22e428c1768ca65715c84bc.exe	82
PID 248 wrote to memory of 4512	248	134a024e7f598986229e902a75f3c2b047dd4370c22e428c1768ca65715c84bc.exe	82
PID 248 wrote to memory of 4512	248	134a024e7f598986229e902a75f3c2b047dd4370c22e428c1768ca65715c84bc.exe	82
PID 248 wrote to memory of 4488	248	134a024e7f598986229e902a75f3c2b047dd4370c22e428c1768ca65715c84bc.exe	83
PID 248 wrote to memory of 4488	248	134a024e7f598986229e902a75f3c2b047dd4370c22e428c1768ca65715c84bc.exe	83
PID 248 wrote to memory of 4488	248	134a024e7f598986229e902a75f3c2b047dd4370c22e428c1768ca65715c84bc.exe	83
PID 4488 wrote to memory of 1988	4488	134a024e7f598986229e902a75f3c2b047dd4370c22e428c1768ca65715c84bc.exe	86
PID 4488 wrote to memory of 1988	4488	134a024e7f598986229e902a75f3c2b047dd4370c22e428c1768ca65715c84bc.exe	86
PID 4488 wrote to memory of 1988	4488	134a024e7f598986229e902a75f3c2b047dd4370c22e428c1768ca65715c84bc.exe	86
PID 4488 wrote to memory of 1988	4488	134a024e7f598986229e902a75f3c2b047dd4370c22e428c1768ca65715c84bc.exe	86
PID 4488 wrote to memory of 1988	4488	134a024e7f598986229e902a75f3c2b047dd4370c22e428c1768ca65715c84bc.exe	86
PID 4488 wrote to memory of 1988	4488	134a024e7f598986229e902a75f3c2b047dd4370c22e428c1768ca65715c84bc.exe	86
PID 4488 wrote to memory of 1988	4488	134a024e7f598986229e902a75f3c2b047dd4370c22e428c1768ca65715c84bc.exe	86
PID 4488 wrote to memory of 1988	4488	134a024e7f598986229e902a75f3c2b047dd4370c22e428c1768ca65715c84bc.exe	86
PID 4488 wrote to memory of 1988	4488	134a024e7f598986229e902a75f3c2b047dd4370c22e428c1768ca65715c84bc.exe	86
PID 4488 wrote to memory of 1988	4488	134a024e7f598986229e902a75f3c2b047dd4370c22e428c1768ca65715c84bc.exe	86

C:\Users\Admin\AppData\Local\Temp\134a024e7f598986229e902a75f3c2b047dd4370c22e428c1768ca65715c84bc.exe
"C:\Users\Admin\AppData\Local\Temp\134a024e7f598986229e902a75f3c2b047dd4370c22e428c1768ca65715c84bc.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2760
- C:\Users\Admin\AppData\Local\Temp\134a024e7f598986229e902a75f3c2b047dd4370c22e428c1768ca65715c84bc.exe
  "C:\Users\Admin\AppData\Local\Temp\134a024e7f598986229e902a75f3c2b047dd4370c22e428c1768ca65715c84bc.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:248
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\f3699345-6460-4d27-88c2-c341465c23ff" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:4512
- - C:\Users\Admin\AppData\Local\Temp\134a024e7f598986229e902a75f3c2b047dd4370c22e428c1768ca65715c84bc.exe
    "C:\Users\Admin\AppData\Local\Temp\134a024e7f598986229e902a75f3c2b047dd4370c22e428c1768ca65715c84bc.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:4488
  - - C:\Users\Admin\AppData\Local\Temp\134a024e7f598986229e902a75f3c2b047dd4370c22e428c1768ca65715c84bc.exe
      "C:\Users\Admin\AppData\Local\Temp\134a024e7f598986229e902a75f3c2b047dd4370c22e428c1768ca65715c84bc.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:1988

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 ca7da5a73c8f86404f9f6c57022a72f623fe359e373c61e2a4aa63318da47b41
MD5 49f1d491d6bb1437526f707e958f8232
SHA1 96f5f96c328d1ebf777344289353e152d9910b00
SHA512 cd55d4daf2e49e78c1952ae6e167b3054630b6a99ebc24ee91b432cfa392b4e6bfd7ee905e3cfaee22e2cc911e430025444a71be68855906dc09a46a600ba6c4
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 a8d87eb43951c7467a35d9f1245b6f625824f96fc447cc55edabce1961db8671
MD5 012ea1154e3e36d0c04e4a89e8003d0b
SHA1 b0e69803fb0a26fa6e05236d15d005854b3d090b
SHA512 8ebb11aba58279054affd0474e787cf177fe57ee51afdd4361a36bab084a35004ffa75c5777bb24adb37fce2e06e7a8d51f876db14c74b971e361dd5860ebbaa
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 47d03c707bffeefc9475707e007a4eab48e2e96cf7f8f65bd25bda0de366ca2d
MD5 f3f79f9973aa0fbc93b9c47a088081ab
SHA1 4f2dc6aeb2ea30e8595c4652ab3032722625b401
SHA512 b5f80889c14cc064028b1e14b27d76c3a4913548adecf71944831b8bf54a8cf1899187e6f2d50a538563a46e4407cc2c706c80c900f3b53f6dbdeec6744fc4cc
MD5 SHA1 SHA512

Submit Download

134a024e7f598986229e902a75f3c2b047dd4370c22e428c1768ca65715c84bc.exe

Path C:\Users\Admin\AppData\Local\f3699345-6460-4d27-88c2-c341465c23ff\134a024e7f598986229e902a75f3c2b047dd4370c22e428c1768ca65715c84bc.exe
Size 761KB
SHA256 134a024e7f598986229e902a75f3c2b047dd4370c22e428c1768ca65715c84bc
MD5 ba17be6ba4bced17f3fb9d48642e063c
SHA1 71fc2aa67a6e1a11547a621c27f42934e25a4a39
SHA512 d40aeb6782388ab3577cd1d4335d0dab306c68e2c9522b0abeae61f1004ad7159c385b870ba0c6bf7ea7fed7a049bf709011792c786b929fa30ff29b0d890219
SSDEEP 12288:JUU0WLpKZ7MSsAtj3CEJSNlPaPlK+NnPnXTrVE6HNDqvUrQ8gxPLG/464O:JD0ZOEwNlUvdXdE6rQxPLtO
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/248-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/248-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/248-2-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/248-17-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/248-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1988-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1988-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1988-23-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1988-39-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1988-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1988-38-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1988-30-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1988-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1988-31-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1988-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1988-24-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2760-1-0x0000000004790000-0x0000000004831000-memory.dmp

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memory/2760-3-0x00000000060A0000-0x00000000061BB000-memory.dmp

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memory/4488-20-0x00000000044C0000-0x000000000455F000-memory.dmp

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