djvu | 41812f712ca4a5a09d4da2614109227454fbf8357a7e69de645a5a5bcbfd7d35

Analysis

max time kernel
148s
max time network
154s
platform
windows11-21h2_x64
resource
win11-20240412-en
resource tags

arch:x64arch:x86image:win11-20240412-enlocale:en-usos:windows11-21h2-x64system
submitted
17/04/2024, 04:41

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General

Target
41812f712ca4a5a09d4da2614109227454fbf8357a7e69de645a5a5bcbfd7d35.exe
Size 805KB
Sample240417-fa6ldaea52
SHA256 41812f712ca4a5a09d4da2614109227454fbf8357a7e69de645a5a5bcbfd7d35
MD5 15468082068a4e43afa48267b8707a59
SHA1 62c2b6e258a82a657a7f4fc24c004d058a3ad907
SHA512 3e43f32263eb7b50903ac92d43bfc8f67dd3d7e7f590aa0ed88f36fa001d034ed31ab8b36712e54b2eb6eac0c88f632663f99ca4b7278754f418ad038f2e34a3
SSDEEP 12288:lajVK6UGzMqdU8ICj27e2D5pjaC46pOSfDHOGt1LE6/FPtZ+i2S23/sVYdk:ldBqdUvzaQj4WTOGtVFPL6d
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.uazq
offline_id
Jx0i3k2ogR5cKxX1evmz0Ex7TUxOUlnbh2dvnIt1
payload_url
http://sdfjhuz.com/dl/build2.exe

http://sajdfue.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/df01994dd8d37c2c33469922f8e7155a20240402134014/fd95b0 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: 0860PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 17 IoCs

resource	yara_rule
behavioral2/memory/2388-2-0x0000000004CA0000-0x0000000004DBB000-memory.dmp	family_djvu
behavioral2/memory/3532-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3532-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3532-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3532-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3532-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1576-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1576-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1576-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1576-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1576-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1576-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1576-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1576-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1576-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1576-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1576-39-0x0000000000400000-0x0000000000537000-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
5636	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-1-5-21-1734202354-1504186683-2192872036-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\53d2c4d7-8106-48ed-bfa2-602702e0ef9f\\41812f712ca4a5a09d4da2614109227454fbf8357a7e69de645a5a5bcbfd7d35.exe\" --AutoStart"	41812f712ca4a5a09d4da2614109227454fbf8357a7e69de645a5a5bcbfd7d35.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
6	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2388 set thread context of 3532	2388	41812f712ca4a5a09d4da2614109227454fbf8357a7e69de645a5a5bcbfd7d35.exe	81
PID 3196 set thread context of 1576	3196	41812f712ca4a5a09d4da2614109227454fbf8357a7e69de645a5a5bcbfd7d35.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
3532	41812f712ca4a5a09d4da2614109227454fbf8357a7e69de645a5a5bcbfd7d35.exe
3532	41812f712ca4a5a09d4da2614109227454fbf8357a7e69de645a5a5bcbfd7d35.exe
1576	41812f712ca4a5a09d4da2614109227454fbf8357a7e69de645a5a5bcbfd7d35.exe
1576	41812f712ca4a5a09d4da2614109227454fbf8357a7e69de645a5a5bcbfd7d35.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2388 wrote to memory of 3532	2388	41812f712ca4a5a09d4da2614109227454fbf8357a7e69de645a5a5bcbfd7d35.exe	81
PID 2388 wrote to memory of 3532	2388	41812f712ca4a5a09d4da2614109227454fbf8357a7e69de645a5a5bcbfd7d35.exe	81
PID 2388 wrote to memory of 3532	2388	41812f712ca4a5a09d4da2614109227454fbf8357a7e69de645a5a5bcbfd7d35.exe	81
PID 2388 wrote to memory of 3532	2388	41812f712ca4a5a09d4da2614109227454fbf8357a7e69de645a5a5bcbfd7d35.exe	81
PID 2388 wrote to memory of 3532	2388	41812f712ca4a5a09d4da2614109227454fbf8357a7e69de645a5a5bcbfd7d35.exe	81
PID 2388 wrote to memory of 3532	2388	41812f712ca4a5a09d4da2614109227454fbf8357a7e69de645a5a5bcbfd7d35.exe	81
PID 2388 wrote to memory of 3532	2388	41812f712ca4a5a09d4da2614109227454fbf8357a7e69de645a5a5bcbfd7d35.exe	81
PID 2388 wrote to memory of 3532	2388	41812f712ca4a5a09d4da2614109227454fbf8357a7e69de645a5a5bcbfd7d35.exe	81
PID 2388 wrote to memory of 3532	2388	41812f712ca4a5a09d4da2614109227454fbf8357a7e69de645a5a5bcbfd7d35.exe	81
PID 2388 wrote to memory of 3532	2388	41812f712ca4a5a09d4da2614109227454fbf8357a7e69de645a5a5bcbfd7d35.exe	81
PID 3532 wrote to memory of 5636	3532	41812f712ca4a5a09d4da2614109227454fbf8357a7e69de645a5a5bcbfd7d35.exe	82
PID 3532 wrote to memory of 5636	3532	41812f712ca4a5a09d4da2614109227454fbf8357a7e69de645a5a5bcbfd7d35.exe	82
PID 3532 wrote to memory of 5636	3532	41812f712ca4a5a09d4da2614109227454fbf8357a7e69de645a5a5bcbfd7d35.exe	82
PID 3532 wrote to memory of 3196	3532	41812f712ca4a5a09d4da2614109227454fbf8357a7e69de645a5a5bcbfd7d35.exe	83
PID 3532 wrote to memory of 3196	3532	41812f712ca4a5a09d4da2614109227454fbf8357a7e69de645a5a5bcbfd7d35.exe	83
PID 3532 wrote to memory of 3196	3532	41812f712ca4a5a09d4da2614109227454fbf8357a7e69de645a5a5bcbfd7d35.exe	83
PID 3196 wrote to memory of 1576	3196	41812f712ca4a5a09d4da2614109227454fbf8357a7e69de645a5a5bcbfd7d35.exe	86
PID 3196 wrote to memory of 1576	3196	41812f712ca4a5a09d4da2614109227454fbf8357a7e69de645a5a5bcbfd7d35.exe	86
PID 3196 wrote to memory of 1576	3196	41812f712ca4a5a09d4da2614109227454fbf8357a7e69de645a5a5bcbfd7d35.exe	86
PID 3196 wrote to memory of 1576	3196	41812f712ca4a5a09d4da2614109227454fbf8357a7e69de645a5a5bcbfd7d35.exe	86
PID 3196 wrote to memory of 1576	3196	41812f712ca4a5a09d4da2614109227454fbf8357a7e69de645a5a5bcbfd7d35.exe	86
PID 3196 wrote to memory of 1576	3196	41812f712ca4a5a09d4da2614109227454fbf8357a7e69de645a5a5bcbfd7d35.exe	86
PID 3196 wrote to memory of 1576	3196	41812f712ca4a5a09d4da2614109227454fbf8357a7e69de645a5a5bcbfd7d35.exe	86
PID 3196 wrote to memory of 1576	3196	41812f712ca4a5a09d4da2614109227454fbf8357a7e69de645a5a5bcbfd7d35.exe	86
PID 3196 wrote to memory of 1576	3196	41812f712ca4a5a09d4da2614109227454fbf8357a7e69de645a5a5bcbfd7d35.exe	86
PID 3196 wrote to memory of 1576	3196	41812f712ca4a5a09d4da2614109227454fbf8357a7e69de645a5a5bcbfd7d35.exe	86

C:\Users\Admin\AppData\Local\Temp\41812f712ca4a5a09d4da2614109227454fbf8357a7e69de645a5a5bcbfd7d35.exe
"C:\Users\Admin\AppData\Local\Temp\41812f712ca4a5a09d4da2614109227454fbf8357a7e69de645a5a5bcbfd7d35.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2388
- C:\Users\Admin\AppData\Local\Temp\41812f712ca4a5a09d4da2614109227454fbf8357a7e69de645a5a5bcbfd7d35.exe
  "C:\Users\Admin\AppData\Local\Temp\41812f712ca4a5a09d4da2614109227454fbf8357a7e69de645a5a5bcbfd7d35.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3532
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\53d2c4d7-8106-48ed-bfa2-602702e0ef9f" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:5636
- - C:\Users\Admin\AppData\Local\Temp\41812f712ca4a5a09d4da2614109227454fbf8357a7e69de645a5a5bcbfd7d35.exe
    "C:\Users\Admin\AppData\Local\Temp\41812f712ca4a5a09d4da2614109227454fbf8357a7e69de645a5a5bcbfd7d35.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:3196
  - - C:\Users\Admin\AppData\Local\Temp\41812f712ca4a5a09d4da2614109227454fbf8357a7e69de645a5a5bcbfd7d35.exe
      "C:\Users\Admin\AppData\Local\Temp\41812f712ca4a5a09d4da2614109227454fbf8357a7e69de645a5a5bcbfd7d35.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:1576

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 80d19fceadd7dff328d2aad17cb6a48416d9e99c2f9e0b7a6bf2d298680b3bfe
MD5 ec2003e227e5cb1c2855622b82a10a2b
SHA1 4cfa4a293d56fc6faec95722b132f4815e62887c
SHA512 ac376e533ae59acc122961bdda99c46166cc4e4209e74a09737487a462113d40c71b53374ada465fda4c555252c87a12aeb059df20d42d18d90b185d635b28fd
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 5bbd1279f5f603f38d85f46408058bc236386dd4eec90f5fe35d245d3025587f
MD5 4c0d7b37a4aa2f2708a28da201942063
SHA1 db4aa42e95a962f7ef3a6074553ae5eae2dfb721
SHA512 e38619b6c3088082495baa8d1b0171994281ee3f1665d53dfc80492a130f8dd112e5686164a7dab174ecc6998188db8d956a9cec867e8ae808e76ca6fd6620db
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 7f3c0732ef3862e8248c32a309cba116bb9503439e57ed7e9de044e10382875d
MD5 9817fc86cac8a19c8af263c2efb5da4a
SHA1 b0034287f2d94184d897036b96bf203dcedb0ddb
SHA512 8ebfbc91a1fd6b45803e8c2efcab27cc6443a059d1f0a4860d67ab7ff7a40c26ad517657a72cccc11e8c66ccc3189a3dd42dab065bdc0330821925ea1d063a61
MD5 SHA1 SHA512

Submit Download

41812f712ca4a5a09d4da2614109227454fbf8357a7e69de645a5a5bcbfd7d35.exe

Path C:\Users\Admin\AppData\Local\53d2c4d7-8106-48ed-bfa2-602702e0ef9f\41812f712ca4a5a09d4da2614109227454fbf8357a7e69de645a5a5bcbfd7d35.exe
Size 805KB
SHA256 41812f712ca4a5a09d4da2614109227454fbf8357a7e69de645a5a5bcbfd7d35
MD5 15468082068a4e43afa48267b8707a59
SHA1 62c2b6e258a82a657a7f4fc24c004d058a3ad907
SHA512 3e43f32263eb7b50903ac92d43bfc8f67dd3d7e7f590aa0ed88f36fa001d034ed31ab8b36712e54b2eb6eac0c88f632663f99ca4b7278754f418ad038f2e34a3
SSDEEP 12288:lajVK6UGzMqdU8ICj27e2D5pjaC46pOSfDHOGt1LE6/FPtZ+i2S23/sVYdk:ldBqdUvzaQj4WTOGtVFPL6d
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1576-30-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1576-31-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1576-39-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1576-38-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1576-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1576-23-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1576-24-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1576-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1576-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1576-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1576-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2388-2-0x0000000004CA0000-0x0000000004DBB000-memory.dmp

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memory/2388-1-0x0000000004C00000-0x0000000004C9A000-memory.dmp

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memory/3196-20-0x0000000004B00000-0x0000000004B93000-memory.dmp

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memory/3532-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3532-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3532-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3532-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3532-17-0x0000000000400000-0x0000000000537000-memory.dmp

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