Analysis
-
max time kernel
142s -
max time network
123s -
platform
windows11-21h2_x64 -
resource
win11-20240426-en -
resource tags
arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system -
submitted
21-05-2024 19:14
Static task
static1
Behavioral task
behavioral1
Sample
a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe
Resource
win10v2004-20240426-en
Behavioral task
behavioral2
Sample
a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe
Resource
win11-20240426-en
General
-
Target
a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe
-
Size
710KB
-
MD5
8858045135c3537e4cc0ea6c49532cc4
-
SHA1
03ea0b26b5766dfcf0cb376a408251755bb608f5
-
SHA256
a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5
-
SHA512
24edb6df506ed00d808f69e6494cdbaafa98c3387e698f2a0312b4feecf1a4008959c18e55f4b2ac62e488728cc0988d5b6b447c62b4e8b48b8faf4f1ea7a879
-
SSDEEP
12288:YIJja8HJIClsdRWU9A9NfLfMs46sa97pOeMcgobLEk8MAz:/a8HVukU96dw4lOeMmb45
Malware Config
Extracted
djvu
http://cajgtus.com/test2/get.php
-
extension
.vehu
-
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: 0872PsawqS
Signatures
-
Detected Djvu ransomware 15 IoCs
Processes:
resource yara_rule behavioral2/memory/4820-2-0x00000000041F0000-0x000000000430B000-memory.dmp family_djvu behavioral2/memory/832-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/832-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/832-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/832-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/832-19-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4136-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4136-27-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4136-28-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4136-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4136-31-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4136-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4136-33-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4136-35-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4136-37-0x0000000000400000-0x0000000000537000-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:
a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-1230210488-3096403634-4129516247-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\ec2f0452-d2cd-4ba1-bccd-1f917d64f456\\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe\" --AutoStart" a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.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 7 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
Processes:
a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exea5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exedescription pid process target process PID 4820 set thread context of 832 4820 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe PID 5112 set thread context of 4136 5112 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
-
Suspicious behavior: EnumeratesProcesses 4 IoCs
Processes:
a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exea5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exepid process 832 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe 832 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe 4136 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe 4136 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe -
Suspicious use of WriteProcessMemory 26 IoCs
Processes:
a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exea5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exea5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exedescription pid process target process PID 4820 wrote to memory of 832 4820 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe PID 4820 wrote to memory of 832 4820 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe PID 4820 wrote to memory of 832 4820 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe PID 4820 wrote to memory of 832 4820 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe PID 4820 wrote to memory of 832 4820 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe PID 4820 wrote to memory of 832 4820 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe PID 4820 wrote to memory of 832 4820 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe PID 4820 wrote to memory of 832 4820 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe PID 4820 wrote to memory of 832 4820 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe PID 4820 wrote to memory of 832 4820 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe PID 832 wrote to memory of 1380 832 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe icacls.exe PID 832 wrote to memory of 1380 832 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe icacls.exe PID 832 wrote to memory of 1380 832 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe icacls.exe PID 832 wrote to memory of 5112 832 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe PID 832 wrote to memory of 5112 832 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe PID 832 wrote to memory of 5112 832 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe PID 5112 wrote to memory of 4136 5112 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe PID 5112 wrote to memory of 4136 5112 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe PID 5112 wrote to memory of 4136 5112 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe PID 5112 wrote to memory of 4136 5112 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe PID 5112 wrote to memory of 4136 5112 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe PID 5112 wrote to memory of 4136 5112 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe PID 5112 wrote to memory of 4136 5112 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe PID 5112 wrote to memory of 4136 5112 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe PID 5112 wrote to memory of 4136 5112 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe PID 5112 wrote to memory of 4136 5112 a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe
Processes
-
C:\Users\Admin\AppData\Local\Temp\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe"C:\Users\Admin\AppData\Local\Temp\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4820 -
C:\Users\Admin\AppData\Local\Temp\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe"C:\Users\Admin\AppData\Local\Temp\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:832 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\ec2f0452-d2cd-4ba1-bccd-1f917d64f456" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:1380 -
C:\Users\Admin\AppData\Local\Temp\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe"C:\Users\Admin\AppData\Local\Temp\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:5112 -
C:\Users\Admin\AppData\Local\Temp\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe"C:\Users\Admin\AppData\Local\Temp\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:4136
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
-
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Filesize1KB
MD5a1d955617a4d146e70544d0d9a0390ca
SHA15ffdc4453b23e24a7cb0e634b26864c169f5257b
SHA2568dbff2c0018158256912d87dd495a68c351303a319f50f204a930317e867aeb3
SHA5120bffbc27638b12cc04f335de8c4f3c74df01ae55b56f389f8d046d797b4c62d31bbff057ea75ce32f67cdd3b878fd0aad3eb62e983f814296e1b94de3c6ba810
-
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
MD5122123fc98ae8ff0cca16e51149c0578
SHA1026c2b6bce228c25cb0be80ec973a3331579ab73
SHA25653bbae2a580744aaa9f38180326644c690a8a419748b23fc310a03a6d0d0e09c
SHA51206b2fa1271698bf7032ed7bd79e47d27e6d28a9dc5b9bd5b5671cd5c5f5824a5433cf3569bfcee5c0b665834df8a649484f64ceab0f42533efef68fcdc29ef60
-
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD5bb39a70c259e83fe6a18f76077dda895
SHA12a485f4f32eae7aa4171a8b087e1ce5edd94d287
SHA2567b563a58e88720ba14aac66312ab440d3c5bd68b3be89356fba308914f8e314a
SHA51236b669b694604508e87ebf5b8a0b7fae7f29a89a348494ebde5a0dae1f74911b60123d0954eaaac3cda74671e5278f9a939a00691fe144e656defaa40ee5dbb0
-
C:\Users\Admin\AppData\Local\ec2f0452-d2cd-4ba1-bccd-1f917d64f456\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe
Filesize710KB
MD58858045135c3537e4cc0ea6c49532cc4
SHA103ea0b26b5766dfcf0cb376a408251755bb608f5
SHA256a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5
SHA51224edb6df506ed00d808f69e6494cdbaafa98c3387e698f2a0312b4feecf1a4008959c18e55f4b2ac62e488728cc0988d5b6b447c62b4e8b48b8faf4f1ea7a879