Analysis
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max time kernel
141s -
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
23-05-2024 05:03
Static task
static1
Behavioral task
behavioral1
Sample
5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe
Resource
win10v2004-20240426-en
Behavioral task
behavioral2
Sample
5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe
Resource
win11-20240426-en
General
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Target
5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe
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Size
807KB
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MD5
399bb1e98a2ada417527f09080839484
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SHA1
3d460c78d4bcf996b40ebc6deab57aa2027065f3
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SHA256
5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc
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SHA512
b0727a92616b9cf7b3e9e7352216c78285371d716d2d269d6cabe6648e0aa03bf5a51899635892cd4966aa7d4da2b28862aaba71d45745a5ed384e8aaa87d875
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SSDEEP
12288:SIYr4sorDGk8GwzeZcs94Swf4L3Dj0/ykitHd6hhEMiJlp:nYr4sVkHiWnIAtHkhEMiB
Malware Config
Extracted
djvu
http://cajgtus.com/test1/get.php
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extension
.vepi
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offline_id
EGfa5svnSGFJka7LZBQoqff0QtO1IpTauoDvGvt1
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payload_url
http://sdfjhuz.com/dl/build2.exe
http://cajgtus.com/files/1/build3.exe
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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
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Detected Djvu ransomware 16 IoCs
Processes:
resource yara_rule behavioral2/memory/2128-2-0x0000000003DF0000-0x0000000003F0B000-memory.dmp family_djvu behavioral2/memory/2024-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2024-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2024-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2024-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2024-19-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2316-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2316-27-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2316-28-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2316-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2316-31-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2316-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2316-36-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2316-37-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2316-38-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2316-39-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu -
Djvu Ransomware
Ransomware which is a variant of the STOP family.
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Modifies file permissions 1 TTPs 1 IoCs
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Adds Run key to start application 2 TTPs 1 IoCs
Processes:
5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-2994005945-4089876968-1367784197-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\6081867b-63ba-47b4-86fb-a0316eb3fc02\\5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe\" --AutoStart" 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.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:
5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exedescription pid process target process PID 2128 set thread context of 2024 2128 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe PID 5064 set thread context of 2316 5064 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious behavior: EnumeratesProcesses 4 IoCs
Processes:
5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exepid process 2024 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe 2024 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe 2316 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe 2316 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe -
Suspicious use of WriteProcessMemory 26 IoCs
Processes:
5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exedescription pid process target process PID 2128 wrote to memory of 2024 2128 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe PID 2128 wrote to memory of 2024 2128 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe PID 2128 wrote to memory of 2024 2128 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe PID 2128 wrote to memory of 2024 2128 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe PID 2128 wrote to memory of 2024 2128 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe PID 2128 wrote to memory of 2024 2128 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe PID 2128 wrote to memory of 2024 2128 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe PID 2128 wrote to memory of 2024 2128 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe PID 2128 wrote to memory of 2024 2128 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe PID 2128 wrote to memory of 2024 2128 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe PID 2024 wrote to memory of 4556 2024 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe icacls.exe PID 2024 wrote to memory of 4556 2024 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe icacls.exe PID 2024 wrote to memory of 4556 2024 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe icacls.exe PID 2024 wrote to memory of 5064 2024 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe PID 2024 wrote to memory of 5064 2024 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe PID 2024 wrote to memory of 5064 2024 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe PID 5064 wrote to memory of 2316 5064 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe PID 5064 wrote to memory of 2316 5064 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe PID 5064 wrote to memory of 2316 5064 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe PID 5064 wrote to memory of 2316 5064 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe PID 5064 wrote to memory of 2316 5064 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe PID 5064 wrote to memory of 2316 5064 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe PID 5064 wrote to memory of 2316 5064 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe PID 5064 wrote to memory of 2316 5064 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe PID 5064 wrote to memory of 2316 5064 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe PID 5064 wrote to memory of 2316 5064 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe 5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe"C:\Users\Admin\AppData\Local\Temp\5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2128 -
C:\Users\Admin\AppData\Local\Temp\5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe"C:\Users\Admin\AppData\Local\Temp\5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2024 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\6081867b-63ba-47b4-86fb-a0316eb3fc02" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:4556 -
C:\Users\Admin\AppData\Local\Temp\5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe"C:\Users\Admin\AppData\Local\Temp\5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:5064 -
C:\Users\Admin\AppData\Local\Temp\5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe"C:\Users\Admin\AppData\Local\Temp\5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:2316
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Filesize1KB
MD57575c39a544943a68ce6e709c586005a
SHA14874b30bd1d455b28a95c4e21c5aecd1ea043d7a
SHA2564737de49245ace1ca1fdeaacd5feee9bbda88bc6f42c84a1ea7d316383792cf8
SHA512abf3d85393725113e720cbe8980b369236511e3984e8cbfa795f19bb5d6e39822e80a835caeb498581797a74b349765ba1a27f26586a17a66ae1c88bd066a3d1
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize724B
MD58202a1cd02e7d69597995cabbe881a12
SHA18858d9d934b7aa9330ee73de6c476acf19929ff6
SHA25658f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5
SHA51297ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Filesize410B
MD5dc2f1523038a3bc4f627528369a85e50
SHA1393cf2d9b2513e6013492dbe6affc510013d05e5
SHA2566ad3064dba8a29523b7d7c9cb6e9dc7c35e352675eec884bf85d70fa762950ca
SHA5127024dec0aaeb1d79b01aa830b8c80830880a6e1e4864e0b89a46144f76e39e68cba4841b4d9c6ed829b7af3f2648fee27d6ee54a71310d88a0591514ab419312
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD505a0af7448af907197789c7a11543bc8
SHA1b4334779930186c11439f3873d91dee66a215d67
SHA2564731746873cc218473fa4bc3348606e49dc2ad0fa73832a341fecf096a85d893
SHA512997e1c1cc350e04a8404d644c18cedcc2fbde003e053354758a26d6eb36c34f4e3c0f926ccba3dc289500353b2321c9de912b84461bb79b6bd202ab4cf7f40c8
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C:\Users\Admin\AppData\Local\6081867b-63ba-47b4-86fb-a0316eb3fc02\5813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc.exe
Filesize807KB
MD5399bb1e98a2ada417527f09080839484
SHA13d460c78d4bcf996b40ebc6deab57aa2027065f3
SHA2565813583d3199620c8d84ff421d4e194ce7d071d20c6e9415d5e5a497f43f81fc
SHA512b0727a92616b9cf7b3e9e7352216c78285371d716d2d269d6cabe6648e0aa03bf5a51899635892cd4966aa7d4da2b28862aaba71d45745a5ed384e8aaa87d875