djvu | 116581df927fa64b9e79294a48c54b207fd0995f5b43c6d253f31df24f00b072

Analysis

max time kernel
141s
max time network
129s
platform
windows11-21h2_x64
resource
win11-20240426-en
resource tags

arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
submitted
09/05/2024, 09:50

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General

Target
116581df927fa64b9e79294a48c54b207fd0995f5b43c6d253f31df24f00b072.exe
Size 739KB
Sample240509-lvambsbf4w
SHA256 116581df927fa64b9e79294a48c54b207fd0995f5b43c6d253f31df24f00b072
MD5 294ff2cd130cadd74986e8f215349f73
SHA1 c50f83bb50774b3a9cbaa3ffc4fed84c55b35f54
SHA512 3857831273fcf3f3ea57f4b37384170d16d7747597410a118f919452b0f843ce85f1ec9d24b4702e954a608c196bb7ff2e1946d2873c7073325c394856471df7
SSDEEP 12288:+FnJuMyhtNPvd69N9Z8RIormvzfMmQkl+e7AkSY2CbQWcQeZVQ1eank7VXJtaJK:+FnJulv+pogM4QeJSrCbQrQe/QgWYVZi
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.qehu
offline_id
jgILOjDrBgyzY4JmT3B2jDSyBmDPBruKk8bKs6t1
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/665ddae3fc3cd10bbaaa4350408b196920240504141005/4cae7e 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: 0868PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 15 IoCs

resource	yara_rule
behavioral2/memory/2008-2-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2008-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3316-3-0x00000000049C0000-0x0000000004ADB000-memory.dmp	family_djvu
behavioral2/memory/2008-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2008-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2008-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2444-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2444-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2444-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2444-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2444-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2444-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2444-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2444-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2444-37-0x0000000000400000-0x0000000000537000-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
1896	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-1-5-21-3938118698-2964058152-2337880935-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\5db92603-5d66-4ef2-99f1-2945ab267505\\116581df927fa64b9e79294a48c54b207fd0995f5b43c6d253f31df24f00b072.exe\" --AutoStart"	116581df927fa64b9e79294a48c54b207fd0995f5b43c6d253f31df24f00b072.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
2	api.2ip.ua
7	api.2ip.ua
1	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3316 set thread context of 2008	3316	116581df927fa64b9e79294a48c54b207fd0995f5b43c6d253f31df24f00b072.exe	82
PID 3296 set thread context of 2444	3296	116581df927fa64b9e79294a48c54b207fd0995f5b43c6d253f31df24f00b072.exe	87

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
2008	116581df927fa64b9e79294a48c54b207fd0995f5b43c6d253f31df24f00b072.exe
2008	116581df927fa64b9e79294a48c54b207fd0995f5b43c6d253f31df24f00b072.exe
2444	116581df927fa64b9e79294a48c54b207fd0995f5b43c6d253f31df24f00b072.exe
2444	116581df927fa64b9e79294a48c54b207fd0995f5b43c6d253f31df24f00b072.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3316 wrote to memory of 2008	3316	116581df927fa64b9e79294a48c54b207fd0995f5b43c6d253f31df24f00b072.exe	82
PID 3316 wrote to memory of 2008	3316	116581df927fa64b9e79294a48c54b207fd0995f5b43c6d253f31df24f00b072.exe	82
PID 3316 wrote to memory of 2008	3316	116581df927fa64b9e79294a48c54b207fd0995f5b43c6d253f31df24f00b072.exe	82
PID 3316 wrote to memory of 2008	3316	116581df927fa64b9e79294a48c54b207fd0995f5b43c6d253f31df24f00b072.exe	82
PID 3316 wrote to memory of 2008	3316	116581df927fa64b9e79294a48c54b207fd0995f5b43c6d253f31df24f00b072.exe	82
PID 3316 wrote to memory of 2008	3316	116581df927fa64b9e79294a48c54b207fd0995f5b43c6d253f31df24f00b072.exe	82
PID 3316 wrote to memory of 2008	3316	116581df927fa64b9e79294a48c54b207fd0995f5b43c6d253f31df24f00b072.exe	82
PID 3316 wrote to memory of 2008	3316	116581df927fa64b9e79294a48c54b207fd0995f5b43c6d253f31df24f00b072.exe	82
PID 3316 wrote to memory of 2008	3316	116581df927fa64b9e79294a48c54b207fd0995f5b43c6d253f31df24f00b072.exe	82
PID 3316 wrote to memory of 2008	3316	116581df927fa64b9e79294a48c54b207fd0995f5b43c6d253f31df24f00b072.exe	82
PID 2008 wrote to memory of 1896	2008	116581df927fa64b9e79294a48c54b207fd0995f5b43c6d253f31df24f00b072.exe	83
PID 2008 wrote to memory of 1896	2008	116581df927fa64b9e79294a48c54b207fd0995f5b43c6d253f31df24f00b072.exe	83
PID 2008 wrote to memory of 1896	2008	116581df927fa64b9e79294a48c54b207fd0995f5b43c6d253f31df24f00b072.exe	83
PID 2008 wrote to memory of 3296	2008	116581df927fa64b9e79294a48c54b207fd0995f5b43c6d253f31df24f00b072.exe	84
PID 2008 wrote to memory of 3296	2008	116581df927fa64b9e79294a48c54b207fd0995f5b43c6d253f31df24f00b072.exe	84
PID 2008 wrote to memory of 3296	2008	116581df927fa64b9e79294a48c54b207fd0995f5b43c6d253f31df24f00b072.exe	84
PID 3296 wrote to memory of 2444	3296	116581df927fa64b9e79294a48c54b207fd0995f5b43c6d253f31df24f00b072.exe	87
PID 3296 wrote to memory of 2444	3296	116581df927fa64b9e79294a48c54b207fd0995f5b43c6d253f31df24f00b072.exe	87
PID 3296 wrote to memory of 2444	3296	116581df927fa64b9e79294a48c54b207fd0995f5b43c6d253f31df24f00b072.exe	87
PID 3296 wrote to memory of 2444	3296	116581df927fa64b9e79294a48c54b207fd0995f5b43c6d253f31df24f00b072.exe	87
PID 3296 wrote to memory of 2444	3296	116581df927fa64b9e79294a48c54b207fd0995f5b43c6d253f31df24f00b072.exe	87
PID 3296 wrote to memory of 2444	3296	116581df927fa64b9e79294a48c54b207fd0995f5b43c6d253f31df24f00b072.exe	87
PID 3296 wrote to memory of 2444	3296	116581df927fa64b9e79294a48c54b207fd0995f5b43c6d253f31df24f00b072.exe	87
PID 3296 wrote to memory of 2444	3296	116581df927fa64b9e79294a48c54b207fd0995f5b43c6d253f31df24f00b072.exe	87
PID 3296 wrote to memory of 2444	3296	116581df927fa64b9e79294a48c54b207fd0995f5b43c6d253f31df24f00b072.exe	87
PID 3296 wrote to memory of 2444	3296	116581df927fa64b9e79294a48c54b207fd0995f5b43c6d253f31df24f00b072.exe	87

C:\Users\Admin\AppData\Local\Temp\116581df927fa64b9e79294a48c54b207fd0995f5b43c6d253f31df24f00b072.exe
"C:\Users\Admin\AppData\Local\Temp\116581df927fa64b9e79294a48c54b207fd0995f5b43c6d253f31df24f00b072.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3316
- C:\Users\Admin\AppData\Local\Temp\116581df927fa64b9e79294a48c54b207fd0995f5b43c6d253f31df24f00b072.exe
  "C:\Users\Admin\AppData\Local\Temp\116581df927fa64b9e79294a48c54b207fd0995f5b43c6d253f31df24f00b072.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2008
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\5db92603-5d66-4ef2-99f1-2945ab267505" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:1896
- - C:\Users\Admin\AppData\Local\Temp\116581df927fa64b9e79294a48c54b207fd0995f5b43c6d253f31df24f00b072.exe
    "C:\Users\Admin\AppData\Local\Temp\116581df927fa64b9e79294a48c54b207fd0995f5b43c6d253f31df24f00b072.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:3296
  - - C:\Users\Admin\AppData\Local\Temp\116581df927fa64b9e79294a48c54b207fd0995f5b43c6d253f31df24f00b072.exe
      "C:\Users\Admin\AppData\Local\Temp\116581df927fa64b9e79294a48c54b207fd0995f5b43c6d253f31df24f00b072.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2444

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 543b85ccce008b8183762d5314650e04a3e3574673e62209965853a497a77a23
MD5 01f6d72b5b393cc9da0cf0999531628c
SHA1 575a3ce0e00e20cbcf5f108654b653b7abf0ce73
SHA512 e2f68cea9401796945b9322e7dfa727c503fa17d3f344c329194c1038e4239421d350a725ce806084e4e797d87a0f629eb25fe5f6f42e605305d079a0cdb2ec6
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 a39aee0d1a325dd172da04cf97b877057a20fa4320549bff81ff09fb9e7e861f
MD5 71456dce5448b332065d1f285b6bac74
SHA1 aa697f1a670908535671d199b08bb6fe91056ec3
SHA512 4b230b70f7e9ccd5761a04035e7f4c031cc953fa8c6d3fb2824184641822aaedef0f6b35b4e6c002bbb8c333da46d22b843dacdf3feca451e571fc19138744cb
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 3f862ab011889f22313bdbb136077772aea78d44fd77ee04215654c32d1fb6e5
MD5 86918f9a41ddd3ce9f57a9e37300c455
SHA1 b10082ae493df63da09ce089189b0936520acd6c
SHA512 735c2444b0c886c1f9d4372b73c595ee882826d5151538735971bb831841803f6aae330156eebeeb8125e00129eb120a9733d4e3c5c59c9633eff1ab736d7731
MD5 SHA1 SHA512

Submit Download

116581df927fa64b9e79294a48c54b207fd0995f5b43c6d253f31df24f00b072.exe

Path C:\Users\Admin\AppData\Local\5db92603-5d66-4ef2-99f1-2945ab267505\116581df927fa64b9e79294a48c54b207fd0995f5b43c6d253f31df24f00b072.exe
Size 739KB
SHA256 116581df927fa64b9e79294a48c54b207fd0995f5b43c6d253f31df24f00b072
MD5 294ff2cd130cadd74986e8f215349f73
SHA1 c50f83bb50774b3a9cbaa3ffc4fed84c55b35f54
SHA512 3857831273fcf3f3ea57f4b37384170d16d7747597410a118f919452b0f843ce85f1ec9d24b4702e954a608c196bb7ff2e1946d2873c7073325c394856471df7
SSDEEP 12288:+FnJuMyhtNPvd69N9Z8RIormvzfMmQkl+e7AkSY2CbQWcQeZVQ1eank7VXJtaJK:+FnJulv+pogM4QeJSrCbQrQe/QgWYVZi
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/2008-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2008-2-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2008-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2008-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2008-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2444-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2444-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2444-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2444-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2444-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2444-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2444-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2444-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2444-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3316-3-0x00000000049C0000-0x0000000004ADB000-memory.dmp

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memory/3316-1-0x0000000002DD0000-0x0000000002E63000-memory.dmp

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