djvu | ba53e9850b442b30608018514e0e80c706c80dbb0ac08e81ed80a3a9df21e0be

Analysis

max time kernel
148s
max time network
157s
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, 12:49

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General

Target
ba53e9850b442b30608018514e0e80c706c80dbb0ac08e81ed80a3a9df21e0be.exe
Size 806KB
Sample240417-p2vgvsfg96
SHA256 ba53e9850b442b30608018514e0e80c706c80dbb0ac08e81ed80a3a9df21e0be
MD5 cfc12d287ff03b6a9f1cf9fb03f1f1e3
SHA1 5d4f1aa2d39abc72f43e9ba01dc05018ed4f4f45
SHA512 2a3b183636db6f8a32c6cfd5ec505b38afaacc7ee005664f0cd3147282fe808006c0dd1cf9b2b340cdebb021a2ca6fc2fd068abdaea21480328c62fe17fc4df4
SSDEEP 12288:h9vFNaPmgwm5tUPLQC6XzczbZ9tZ+eA1kJf4b/TWPoR4B5zx1vuJ5Z/VyhH:hoPmRR6jcfZ9DzA10S/SC4B5zGJ5Zk
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

http://sajdfue.com/test1/get.php

Attributes

extension
.uajs
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: 0859PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 17 IoCs

resource	yara_rule
behavioral2/memory/3432-2-0x0000000004C90000-0x0000000004DAB000-memory.dmp	family_djvu
behavioral2/memory/4468-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4468-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4468-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4468-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4468-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1052-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1052-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1052-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1052-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1052-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1052-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1052-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1052-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1052-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1052-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1052-39-0x0000000000400000-0x0000000000537000-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
2372	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-1-5-21-8492748-3358837828-1435473090-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\f6bd2060-a28e-46e6-bbcd-8211d37d01c1\\ba53e9850b442b30608018514e0e80c706c80dbb0ac08e81ed80a3a9df21e0be.exe\" --AutoStart"	ba53e9850b442b30608018514e0e80c706c80dbb0ac08e81ed80a3a9df21e0be.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 3432 set thread context of 4468	3432	ba53e9850b442b30608018514e0e80c706c80dbb0ac08e81ed80a3a9df21e0be.exe	81
PID 2040 set thread context of 1052	2040	ba53e9850b442b30608018514e0e80c706c80dbb0ac08e81ed80a3a9df21e0be.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
4468	ba53e9850b442b30608018514e0e80c706c80dbb0ac08e81ed80a3a9df21e0be.exe
4468	ba53e9850b442b30608018514e0e80c706c80dbb0ac08e81ed80a3a9df21e0be.exe
1052	ba53e9850b442b30608018514e0e80c706c80dbb0ac08e81ed80a3a9df21e0be.exe
1052	ba53e9850b442b30608018514e0e80c706c80dbb0ac08e81ed80a3a9df21e0be.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3432 wrote to memory of 4468	3432	ba53e9850b442b30608018514e0e80c706c80dbb0ac08e81ed80a3a9df21e0be.exe	81
PID 3432 wrote to memory of 4468	3432	ba53e9850b442b30608018514e0e80c706c80dbb0ac08e81ed80a3a9df21e0be.exe	81
PID 3432 wrote to memory of 4468	3432	ba53e9850b442b30608018514e0e80c706c80dbb0ac08e81ed80a3a9df21e0be.exe	81
PID 3432 wrote to memory of 4468	3432	ba53e9850b442b30608018514e0e80c706c80dbb0ac08e81ed80a3a9df21e0be.exe	81
PID 3432 wrote to memory of 4468	3432	ba53e9850b442b30608018514e0e80c706c80dbb0ac08e81ed80a3a9df21e0be.exe	81
PID 3432 wrote to memory of 4468	3432	ba53e9850b442b30608018514e0e80c706c80dbb0ac08e81ed80a3a9df21e0be.exe	81
PID 3432 wrote to memory of 4468	3432	ba53e9850b442b30608018514e0e80c706c80dbb0ac08e81ed80a3a9df21e0be.exe	81
PID 3432 wrote to memory of 4468	3432	ba53e9850b442b30608018514e0e80c706c80dbb0ac08e81ed80a3a9df21e0be.exe	81
PID 3432 wrote to memory of 4468	3432	ba53e9850b442b30608018514e0e80c706c80dbb0ac08e81ed80a3a9df21e0be.exe	81
PID 3432 wrote to memory of 4468	3432	ba53e9850b442b30608018514e0e80c706c80dbb0ac08e81ed80a3a9df21e0be.exe	81
PID 4468 wrote to memory of 2372	4468	ba53e9850b442b30608018514e0e80c706c80dbb0ac08e81ed80a3a9df21e0be.exe	82
PID 4468 wrote to memory of 2372	4468	ba53e9850b442b30608018514e0e80c706c80dbb0ac08e81ed80a3a9df21e0be.exe	82
PID 4468 wrote to memory of 2372	4468	ba53e9850b442b30608018514e0e80c706c80dbb0ac08e81ed80a3a9df21e0be.exe	82
PID 4468 wrote to memory of 2040	4468	ba53e9850b442b30608018514e0e80c706c80dbb0ac08e81ed80a3a9df21e0be.exe	83
PID 4468 wrote to memory of 2040	4468	ba53e9850b442b30608018514e0e80c706c80dbb0ac08e81ed80a3a9df21e0be.exe	83
PID 4468 wrote to memory of 2040	4468	ba53e9850b442b30608018514e0e80c706c80dbb0ac08e81ed80a3a9df21e0be.exe	83
PID 2040 wrote to memory of 1052	2040	ba53e9850b442b30608018514e0e80c706c80dbb0ac08e81ed80a3a9df21e0be.exe	86
PID 2040 wrote to memory of 1052	2040	ba53e9850b442b30608018514e0e80c706c80dbb0ac08e81ed80a3a9df21e0be.exe	86
PID 2040 wrote to memory of 1052	2040	ba53e9850b442b30608018514e0e80c706c80dbb0ac08e81ed80a3a9df21e0be.exe	86
PID 2040 wrote to memory of 1052	2040	ba53e9850b442b30608018514e0e80c706c80dbb0ac08e81ed80a3a9df21e0be.exe	86
PID 2040 wrote to memory of 1052	2040	ba53e9850b442b30608018514e0e80c706c80dbb0ac08e81ed80a3a9df21e0be.exe	86
PID 2040 wrote to memory of 1052	2040	ba53e9850b442b30608018514e0e80c706c80dbb0ac08e81ed80a3a9df21e0be.exe	86
PID 2040 wrote to memory of 1052	2040	ba53e9850b442b30608018514e0e80c706c80dbb0ac08e81ed80a3a9df21e0be.exe	86
PID 2040 wrote to memory of 1052	2040	ba53e9850b442b30608018514e0e80c706c80dbb0ac08e81ed80a3a9df21e0be.exe	86
PID 2040 wrote to memory of 1052	2040	ba53e9850b442b30608018514e0e80c706c80dbb0ac08e81ed80a3a9df21e0be.exe	86
PID 2040 wrote to memory of 1052	2040	ba53e9850b442b30608018514e0e80c706c80dbb0ac08e81ed80a3a9df21e0be.exe	86

C:\Users\Admin\AppData\Local\Temp\ba53e9850b442b30608018514e0e80c706c80dbb0ac08e81ed80a3a9df21e0be.exe
"C:\Users\Admin\AppData\Local\Temp\ba53e9850b442b30608018514e0e80c706c80dbb0ac08e81ed80a3a9df21e0be.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3432
- C:\Users\Admin\AppData\Local\Temp\ba53e9850b442b30608018514e0e80c706c80dbb0ac08e81ed80a3a9df21e0be.exe
  "C:\Users\Admin\AppData\Local\Temp\ba53e9850b442b30608018514e0e80c706c80dbb0ac08e81ed80a3a9df21e0be.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4468
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\f6bd2060-a28e-46e6-bbcd-8211d37d01c1" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2372
- - C:\Users\Admin\AppData\Local\Temp\ba53e9850b442b30608018514e0e80c706c80dbb0ac08e81ed80a3a9df21e0be.exe
    "C:\Users\Admin\AppData\Local\Temp\ba53e9850b442b30608018514e0e80c706c80dbb0ac08e81ed80a3a9df21e0be.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2040
  - - C:\Users\Admin\AppData\Local\Temp\ba53e9850b442b30608018514e0e80c706c80dbb0ac08e81ed80a3a9df21e0be.exe
      "C:\Users\Admin\AppData\Local\Temp\ba53e9850b442b30608018514e0e80c706c80dbb0ac08e81ed80a3a9df21e0be.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:1052

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 9bd599b72ac9d6f5ad1da7982d2a847f52f01c8922bb0d1b27371b11dedf4c3a
MD5 896dc4f56c1b7ce86308a438e1eb5384
SHA1 edb5c0ee5aba86a7622d59aa3db7ff3abef929f9
SHA512 81728dfb7eccf691ccc4b556d0f61d4af1d0f7696009a03deb46502f843e9bd15b6cc41d50cdba0ea0c26891f0eaffa8a9ff33e8a35ade02c0f51037c7b4e549
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 9d57055dbfe337929b70b76be43cfbe1cbb3ff6702df4bdc29fdb664b88c53fd
MD5 b0a47a4685d79b71c76309b304c76f1d
SHA1 8c6f1e0f3306636e3d984686aca59b8ae0d1b2c1
SHA512 cbe061f181e1795e4d4d87d540b5d26efaa304def19888db81b2865a8ff4a816107bf83d9a53913ddd50e24d30bdd628589967d823261c5a0c31109ec2b95007
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 4ab6074afe03a937680cbf089dfc02c70eec6a947fb7327a441ddb69eafcd135
MD5 1e2738b7e1853bad1d7792f6b31cab0e
SHA1 25f976d73b0d270fa89e3b7ecd9fa392a0d6864d
SHA512 1e233abb6bd1780f1a42376127747f20d3d8712ad1032ca0612b6428e5cb934db64a5bb2dc4d67bbcd469b48cd00fb4399b9d3e146cc1e7b365ba01bac5dae91
MD5 SHA1 SHA512

Submit Download

ba53e9850b442b30608018514e0e80c706c80dbb0ac08e81ed80a3a9df21e0be.exe

Path C:\Users\Admin\AppData\Local\f6bd2060-a28e-46e6-bbcd-8211d37d01c1\ba53e9850b442b30608018514e0e80c706c80dbb0ac08e81ed80a3a9df21e0be.exe
Size 806KB
SHA256 ba53e9850b442b30608018514e0e80c706c80dbb0ac08e81ed80a3a9df21e0be
MD5 cfc12d287ff03b6a9f1cf9fb03f1f1e3
SHA1 5d4f1aa2d39abc72f43e9ba01dc05018ed4f4f45
SHA512 2a3b183636db6f8a32c6cfd5ec505b38afaacc7ee005664f0cd3147282fe808006c0dd1cf9b2b340cdebb021a2ca6fc2fd068abdaea21480328c62fe17fc4df4
SSDEEP 12288:h9vFNaPmgwm5tUPLQC6XzczbZ9tZ+eA1kJf4b/TWPoR4B5zx1vuJ5Z/VyhH:hoPmRR6jcfZ9DzA10S/SC4B5zGJ5Zk
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1052-30-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1052-31-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1052-39-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1052-38-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1052-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1052-23-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1052-24-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1052-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1052-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1052-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1052-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2040-21-0x0000000004B00000-0x0000000004B99000-memory.dmp

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memory/3432-2-0x0000000004C90000-0x0000000004DAB000-memory.dmp

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memory/3432-1-0x0000000004BF0000-0x0000000004C8D000-memory.dmp

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memory/4468-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4468-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4468-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4468-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4468-17-0x0000000000400000-0x0000000000537000-memory.dmp

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