djvu | 4d372ff6d6c16c5458e829b53d5c95dc88180220b820d33bdc450a128c367567

Analysis

max time kernel
293s
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
25/04/2024, 02:10

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General

Target
4d372ff6d6c16c5458e829b53d5c95dc88180220b820d33bdc450a128c367567.exe
Size 768KB
Sample240425-clsbcadf4z
SHA256 4d372ff6d6c16c5458e829b53d5c95dc88180220b820d33bdc450a128c367567
MD5 975b56aa2e294e80d1d6d92c64e018f6
SHA1 9dceaf2afac1425526811a9656f41712d8d7aa81
SHA512 dbb2eb0288f95583843687144ef57487503c0c69e2db4b6737ebaae219ad61d60e593e7e6e4c605ad2d0de14bc136bbd71999c359cc873db891436a0ab78f008
SSDEEP 12288:8QwHqZVFdG/giOGx6Jqe1OdPUVb6W6SK2qEqzTRzvBz3eBGK0:+Hy5G/7O6cqxMGWw8qpDpO
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 18 IoCs

resource	yara_rule
behavioral2/memory/2576-2-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2576-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3484-4-0x00000000049E0000-0x0000000004AFB000-memory.dmp	family_djvu
behavioral2/memory/2576-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2576-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2576-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/192-21-0x0000000002D30000-0x0000000002DCF000-memory.dmp	family_djvu
behavioral2/memory/4572-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4572-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4572-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4572-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4572-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4572-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4572-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4572-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4572-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4572-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4572-38-0x0000000000400000-0x0000000000537000-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
2876	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-1-5-21-1687926120-3022217735-1146543763-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\b3cdd5cd-517e-4ccb-a617-8852befc2ae6\\4d372ff6d6c16c5458e829b53d5c95dc88180220b820d33bdc450a128c367567.exe\" --AutoStart"	4d372ff6d6c16c5458e829b53d5c95dc88180220b820d33bdc450a128c367567.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
10	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3484 set thread context of 2576	3484	4d372ff6d6c16c5458e829b53d5c95dc88180220b820d33bdc450a128c367567.exe	73
PID 192 set thread context of 4572	192	4d372ff6d6c16c5458e829b53d5c95dc88180220b820d33bdc450a128c367567.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
2576	4d372ff6d6c16c5458e829b53d5c95dc88180220b820d33bdc450a128c367567.exe
2576	4d372ff6d6c16c5458e829b53d5c95dc88180220b820d33bdc450a128c367567.exe
4572	4d372ff6d6c16c5458e829b53d5c95dc88180220b820d33bdc450a128c367567.exe
4572	4d372ff6d6c16c5458e829b53d5c95dc88180220b820d33bdc450a128c367567.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3484 wrote to memory of 2576	3484	4d372ff6d6c16c5458e829b53d5c95dc88180220b820d33bdc450a128c367567.exe	73
PID 3484 wrote to memory of 2576	3484	4d372ff6d6c16c5458e829b53d5c95dc88180220b820d33bdc450a128c367567.exe	73
PID 3484 wrote to memory of 2576	3484	4d372ff6d6c16c5458e829b53d5c95dc88180220b820d33bdc450a128c367567.exe	73
PID 3484 wrote to memory of 2576	3484	4d372ff6d6c16c5458e829b53d5c95dc88180220b820d33bdc450a128c367567.exe	73
PID 3484 wrote to memory of 2576	3484	4d372ff6d6c16c5458e829b53d5c95dc88180220b820d33bdc450a128c367567.exe	73
PID 3484 wrote to memory of 2576	3484	4d372ff6d6c16c5458e829b53d5c95dc88180220b820d33bdc450a128c367567.exe	73
PID 3484 wrote to memory of 2576	3484	4d372ff6d6c16c5458e829b53d5c95dc88180220b820d33bdc450a128c367567.exe	73
PID 3484 wrote to memory of 2576	3484	4d372ff6d6c16c5458e829b53d5c95dc88180220b820d33bdc450a128c367567.exe	73
PID 3484 wrote to memory of 2576	3484	4d372ff6d6c16c5458e829b53d5c95dc88180220b820d33bdc450a128c367567.exe	73
PID 3484 wrote to memory of 2576	3484	4d372ff6d6c16c5458e829b53d5c95dc88180220b820d33bdc450a128c367567.exe	73
PID 2576 wrote to memory of 2876	2576	4d372ff6d6c16c5458e829b53d5c95dc88180220b820d33bdc450a128c367567.exe	74
PID 2576 wrote to memory of 2876	2576	4d372ff6d6c16c5458e829b53d5c95dc88180220b820d33bdc450a128c367567.exe	74
PID 2576 wrote to memory of 2876	2576	4d372ff6d6c16c5458e829b53d5c95dc88180220b820d33bdc450a128c367567.exe	74
PID 2576 wrote to memory of 192	2576	4d372ff6d6c16c5458e829b53d5c95dc88180220b820d33bdc450a128c367567.exe	75
PID 2576 wrote to memory of 192	2576	4d372ff6d6c16c5458e829b53d5c95dc88180220b820d33bdc450a128c367567.exe	75
PID 2576 wrote to memory of 192	2576	4d372ff6d6c16c5458e829b53d5c95dc88180220b820d33bdc450a128c367567.exe	75
PID 192 wrote to memory of 4572	192	4d372ff6d6c16c5458e829b53d5c95dc88180220b820d33bdc450a128c367567.exe	77
PID 192 wrote to memory of 4572	192	4d372ff6d6c16c5458e829b53d5c95dc88180220b820d33bdc450a128c367567.exe	77
PID 192 wrote to memory of 4572	192	4d372ff6d6c16c5458e829b53d5c95dc88180220b820d33bdc450a128c367567.exe	77
PID 192 wrote to memory of 4572	192	4d372ff6d6c16c5458e829b53d5c95dc88180220b820d33bdc450a128c367567.exe	77
PID 192 wrote to memory of 4572	192	4d372ff6d6c16c5458e829b53d5c95dc88180220b820d33bdc450a128c367567.exe	77
PID 192 wrote to memory of 4572	192	4d372ff6d6c16c5458e829b53d5c95dc88180220b820d33bdc450a128c367567.exe	77
PID 192 wrote to memory of 4572	192	4d372ff6d6c16c5458e829b53d5c95dc88180220b820d33bdc450a128c367567.exe	77
PID 192 wrote to memory of 4572	192	4d372ff6d6c16c5458e829b53d5c95dc88180220b820d33bdc450a128c367567.exe	77
PID 192 wrote to memory of 4572	192	4d372ff6d6c16c5458e829b53d5c95dc88180220b820d33bdc450a128c367567.exe	77
PID 192 wrote to memory of 4572	192	4d372ff6d6c16c5458e829b53d5c95dc88180220b820d33bdc450a128c367567.exe	77

C:\Users\Admin\AppData\Local\Temp\4d372ff6d6c16c5458e829b53d5c95dc88180220b820d33bdc450a128c367567.exe
"C:\Users\Admin\AppData\Local\Temp\4d372ff6d6c16c5458e829b53d5c95dc88180220b820d33bdc450a128c367567.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3484
- C:\Users\Admin\AppData\Local\Temp\4d372ff6d6c16c5458e829b53d5c95dc88180220b820d33bdc450a128c367567.exe
  "C:\Users\Admin\AppData\Local\Temp\4d372ff6d6c16c5458e829b53d5c95dc88180220b820d33bdc450a128c367567.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2576
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\b3cdd5cd-517e-4ccb-a617-8852befc2ae6" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2876
- - C:\Users\Admin\AppData\Local\Temp\4d372ff6d6c16c5458e829b53d5c95dc88180220b820d33bdc450a128c367567.exe
    "C:\Users\Admin\AppData\Local\Temp\4d372ff6d6c16c5458e829b53d5c95dc88180220b820d33bdc450a128c367567.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:192
  - - C:\Users\Admin\AppData\Local\Temp\4d372ff6d6c16c5458e829b53d5c95dc88180220b820d33bdc450a128c367567.exe
      "C:\Users\Admin\AppData\Local\Temp\4d372ff6d6c16c5458e829b53d5c95dc88180220b820d33bdc450a128c367567.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:4572

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 a7760866eaf849b079815652f9dce9eb9ec7c599199bc65c7030ca9e2ed91c26
MD5 f8ed6292d6d2f9514668acec50849d17
SHA1 482745d97c48b32fd986e488d169ac4eb7edd737
SHA512 ebc265c4a27c4a1d14ef783b28f3cb0de9ca4f28795078c3d80bf2ec6574c4e8f3f3c7c68197b1ea6f037cb88268cfab99817660f442696167120bc6275cad4f
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 58134df5609d4aaf7058ec01bd34c218d4f04a201d17e9ff11085c2fe74bac11
MD5 6e373a476b1fc6954fb9090a33a06adb
SHA1 cfa4daebbfecdd3fcd494550645ea8c56e87a483
SHA512 0cc28a2b30d736f705675c3643a2c10c86b6e6f94963b5cd53d214fd5cea736de1001361e482162c675f77cc6881bb780ee757243fc54fd324b7a31ba7b69550
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 522ca7623f291d3eff8a75f89ee034528c24a909d298d10f2371af75791d1b2e
MD5 1c9242abb86270c4a395a8ceffa54f29
SHA1 0c4e7fc0f6f09015a5e0e25ca42034f48a5bab84
SHA512 ca4b02913b24a97d47c1d73073899ecd3a8c76de6883a6dafd068a16e9ea4493a140c8226359d157b2c24867a6cb004ab5ed233f78a013e597eb99ac62507517
MD5 SHA1 SHA512

Submit Download

4d372ff6d6c16c5458e829b53d5c95dc88180220b820d33bdc450a128c367567.exe

Path C:\Users\Admin\AppData\Local\b3cdd5cd-517e-4ccb-a617-8852befc2ae6\4d372ff6d6c16c5458e829b53d5c95dc88180220b820d33bdc450a128c367567.exe
Size 768KB
SHA256 4d372ff6d6c16c5458e829b53d5c95dc88180220b820d33bdc450a128c367567
MD5 975b56aa2e294e80d1d6d92c64e018f6
SHA1 9dceaf2afac1425526811a9656f41712d8d7aa81
SHA512 dbb2eb0288f95583843687144ef57487503c0c69e2db4b6737ebaae219ad61d60e593e7e6e4c605ad2d0de14bc136bbd71999c359cc873db891436a0ab78f008
SSDEEP 12288:8QwHqZVFdG/giOGx6Jqe1OdPUVb6W6SK2qEqzTRzvBz3eBGK0:+Hy5G/7O6cqxMGWw8qpDpO
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/192-21-0x0000000002D30000-0x0000000002DCF000-memory.dmp

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memory/2576-17-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2576-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2576-2-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2576-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2576-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3484-4-0x00000000049E0000-0x0000000004AFB000-memory.dmp

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memory/3484-1-0x0000000002F10000-0x0000000002FA9000-memory.dmp

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memory/4572-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4572-24-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4572-23-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4572-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4572-30-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4572-31-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4572-33-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4572-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4572-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4572-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4572-38-0x0000000000400000-0x0000000000537000-memory.dmp

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