Analysis
-
max time kernel
143s -
max time network
127s -
platform
windows11-21h2_x64 -
resource
win11-20240508-en -
resource tags
arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system -
submitted
22-05-2024 12:42
Static task
static1
Behavioral task
behavioral1
Sample
81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe
Resource
win10v2004-20240426-en
Behavioral task
behavioral2
Sample
81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe
Resource
win11-20240508-en
General
-
Target
81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe
-
Size
707KB
-
MD5
468a3f5c25350ab961951730de8c4ede
-
SHA1
d8ff3e77681ab16fb0da2bf80bd1fd76aae75b7c
-
SHA256
81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc
-
SHA512
0ed8087d988a9b2f0ff3572e29b720890e24ccc1423c7f6d1260992197033018cc415c60d4f0d22c80c7d329b83daae0a27dc98d341e5563fef209a20b05f69d
-
SSDEEP
12288:YSQYWaFRQdi4YyslM3FqvlVdfQ9gqSXHTSPT/HqoBMfffJJlh4jUHDixdSVHA:YSQwFROi4hF1+bdIKLXwTRufff8U+vSq
Malware Config
Extracted
djvu
http://cajgtus.com/test1/get.php
-
extension
.vepi
-
offline_id
EGfa5svnSGFJka7LZBQoqff0QtO1IpTauoDvGvt1
-
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/33b490a613f49fa190924f199d2c079e20240512191214/caaf73 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: 0871PsawqS
Signatures
-
Detected Djvu ransomware 15 IoCs
Processes:
resource yara_rule behavioral2/memory/1804-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1804-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1804-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1804-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3004-2-0x0000000004B80000-0x0000000004C9B000-memory.dmp family_djvu behavioral2/memory/1804-19-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3488-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3488-27-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3488-28-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3488-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3488-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3488-32-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3488-35-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3488-36-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3488-37-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu -
Djvu Ransomware
Ransomware which is a variant of the STOP family.
-
Modifies file permissions 1 TTPs 1 IoCs
-
Adds Run key to start application 2 TTPs 1 IoCs
Processes:
81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-2457560273-69882387-977367775-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\f4cbe16c-8b55-4bc3-8992-3bc046a99c6d\\81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe\" --AutoStart" 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.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.
Processes:
flow ioc 1 api.2ip.ua 2 api.2ip.ua 8 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
Processes:
81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exedescription pid process target process PID 3004 set thread context of 1804 3004 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe PID 5012 set thread context of 3488 5012 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
-
Suspicious behavior: EnumeratesProcesses 4 IoCs
Processes:
81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exepid process 1804 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe 1804 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe 3488 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe 3488 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe -
Suspicious use of WriteProcessMemory 26 IoCs
Processes:
81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exedescription pid process target process PID 3004 wrote to memory of 1804 3004 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe PID 3004 wrote to memory of 1804 3004 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe PID 3004 wrote to memory of 1804 3004 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe PID 3004 wrote to memory of 1804 3004 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe PID 3004 wrote to memory of 1804 3004 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe PID 3004 wrote to memory of 1804 3004 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe PID 3004 wrote to memory of 1804 3004 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe PID 3004 wrote to memory of 1804 3004 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe PID 3004 wrote to memory of 1804 3004 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe PID 3004 wrote to memory of 1804 3004 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe PID 1804 wrote to memory of 5096 1804 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe icacls.exe PID 1804 wrote to memory of 5096 1804 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe icacls.exe PID 1804 wrote to memory of 5096 1804 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe icacls.exe PID 1804 wrote to memory of 5012 1804 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe PID 1804 wrote to memory of 5012 1804 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe PID 1804 wrote to memory of 5012 1804 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe PID 5012 wrote to memory of 3488 5012 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe PID 5012 wrote to memory of 3488 5012 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe PID 5012 wrote to memory of 3488 5012 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe PID 5012 wrote to memory of 3488 5012 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe PID 5012 wrote to memory of 3488 5012 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe PID 5012 wrote to memory of 3488 5012 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe PID 5012 wrote to memory of 3488 5012 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe PID 5012 wrote to memory of 3488 5012 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe PID 5012 wrote to memory of 3488 5012 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe PID 5012 wrote to memory of 3488 5012 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe
Processes
-
C:\Users\Admin\AppData\Local\Temp\81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe"C:\Users\Admin\AppData\Local\Temp\81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3004 -
C:\Users\Admin\AppData\Local\Temp\81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe"C:\Users\Admin\AppData\Local\Temp\81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1804 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\f4cbe16c-8b55-4bc3-8992-3bc046a99c6d" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:5096 -
C:\Users\Admin\AppData\Local\Temp\81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe"C:\Users\Admin\AppData\Local\Temp\81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:5012 -
C:\Users\Admin\AppData\Local\Temp\81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe"C:\Users\Admin\AppData\Local\Temp\81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:3488
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
-
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Filesize1KB
MD56728aea2631b86a76c237508d8ba9b55
SHA17a670f95cac088313f7558869162fe01c6dc0ec9
SHA256e1dd7380c6df33cd5702b032e0e359029d3ef7630f06ceb42cfdc154fd0baf7b
SHA512533080cd1ec40b8530cad5c9914e0a5156d225f7392283ed2607eda4f1db4a6930002274060ed9130a6f634222c2e15818e16a50579cfe7f5274d028d31212f5
-
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize724B
MD58202a1cd02e7d69597995cabbe881a12
SHA18858d9d934b7aa9330ee73de6c476acf19929ff6
SHA25658f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5
SHA51297ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9
-
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Filesize410B
MD57e6d5b8617fe039fca48abab0067a4f7
SHA12eafde995b9010d8ddd19deae32d3f4278696efa
SHA256d7c4ba660fa0493a398ba170ee34569bb08a5009e3684b1bb069951ecc8f4889
SHA51282e6efcc1b70625c75237e51e72a99c33b98b964150e6f963eb00893ee2b30ef927dfd26b1b58df4d4ee40d3267ea26ee90c70b2525442dd69d56fed70437814
-
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD5e55ff4b633b05f26589dbac13ad74182
SHA13a9c12b2b00ebdf4f874aa70357441ad6dadf49d
SHA256a92cff4371b0d15d94a6e5a4e87bc3a8b4f1608a7db1569a35d2273c382d99a0
SHA512aa092ddd39ebc80d972ac4c0b79ec289e4136b4c56da159adc526b1bc84341db8bda93f3a33e08ad327010ec768e11004edf8010e9f81b655d15af64aa5af17a
-
C:\Users\Admin\AppData\Local\f4cbe16c-8b55-4bc3-8992-3bc046a99c6d\81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe
Filesize707KB
MD5468a3f5c25350ab961951730de8c4ede
SHA1d8ff3e77681ab16fb0da2bf80bd1fd76aae75b7c
SHA25681fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc
SHA5120ed8087d988a9b2f0ff3572e29b720890e24ccc1423c7f6d1260992197033018cc415c60d4f0d22c80c7d329b83daae0a27dc98d341e5563fef209a20b05f69d