Analysis
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max time kernel
147s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
26/01/2024, 03:24
Static task
static1
Behavioral task
behavioral1
Sample
76423c0da5d1aca1e737da17a2319250.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
76423c0da5d1aca1e737da17a2319250.exe
Resource
win10v2004-20231215-en
General
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Target
76423c0da5d1aca1e737da17a2319250.exe
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Size
758KB
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MD5
76423c0da5d1aca1e737da17a2319250
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SHA1
283a5e8ca8c196920b80d6353a1789b205992a8e
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SHA256
a11ffacad8ded4ac1f3e634d9cdcdda320d075cc6b2e71819958399ddd34b15c
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SHA512
a0b2fac294e914f1a0c17b4e60daa997d4f6fa5ecf527774ba6c9277ffb09e6510745c9a68cdf044cca62bd3d84944d4c50f641c4360b752e7bdafa536c3a49f
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SSDEEP
12288:yYyNIBTERFiRGWo/V4l8Jv2kpXCVFiialb09S4Ykp6ZuyBhQxXARwoOtnzM:yIBTJGr4029XVaZ09Nhp6ZuyBexX2Anz
Malware Config
Extracted
djvu
http://astdg.top/fhsgtsspen6/get.php
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extension
.nooa
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offline_id
PLtnD1U6oAmgxgJ2nJik1mY9SwUQg07CiN0zSet1
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payload_url
http://securebiz.org/dl/build2.exe
http://astdg.top/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. You can get and look video overview decrypt tool: https://we.tl/t-CnI3tI6Ktv Price of private key and decrypt software is $980. Discount 50% available if you contact us first 72 hours, that's price for you is $490. 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: 0322gDrgo
Signatures
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Detected Djvu ransomware 17 IoCs
resource yara_rule behavioral2/memory/1200-2-0x0000000004BA0000-0x0000000004CBB000-memory.dmp family_djvu behavioral2/memory/1608-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1608-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1608-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1608-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1608-16-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3028-20-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3028-21-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3028-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3028-27-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3028-28-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3028-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3028-31-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3028-33-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3028-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3028-35-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3028-37-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu -
Djvu Ransomware
Ransomware which is a variant of the STOP family.
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Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-996941297-2279405024-2328152752-1000\Control Panel\International\Geo\Nation 76423c0da5d1aca1e737da17a2319250.exe -
Modifies file permissions 1 TTPs 1 IoCs
pid Process 4156 icacls.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-996941297-2279405024-2328152752-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\bf7fd6cc-8d11-4f67-b618-ddcca40f9111\\76423c0da5d1aca1e737da17a2319250.exe\" --AutoStart" 76423c0da5d1aca1e737da17a2319250.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 6 api.2ip.ua 7 api.2ip.ua 23 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 1200 set thread context of 1608 1200 76423c0da5d1aca1e737da17a2319250.exe 88 PID 1452 set thread context of 3028 1452 76423c0da5d1aca1e737da17a2319250.exe 94 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious behavior: EnumeratesProcesses 4 IoCs
pid Process 1608 76423c0da5d1aca1e737da17a2319250.exe 1608 76423c0da5d1aca1e737da17a2319250.exe 3028 76423c0da5d1aca1e737da17a2319250.exe 3028 76423c0da5d1aca1e737da17a2319250.exe -
Suspicious use of WriteProcessMemory 26 IoCs
description pid Process procid_target PID 1200 wrote to memory of 1608 1200 76423c0da5d1aca1e737da17a2319250.exe 88 PID 1200 wrote to memory of 1608 1200 76423c0da5d1aca1e737da17a2319250.exe 88 PID 1200 wrote to memory of 1608 1200 76423c0da5d1aca1e737da17a2319250.exe 88 PID 1200 wrote to memory of 1608 1200 76423c0da5d1aca1e737da17a2319250.exe 88 PID 1200 wrote to memory of 1608 1200 76423c0da5d1aca1e737da17a2319250.exe 88 PID 1200 wrote to memory of 1608 1200 76423c0da5d1aca1e737da17a2319250.exe 88 PID 1200 wrote to memory of 1608 1200 76423c0da5d1aca1e737da17a2319250.exe 88 PID 1200 wrote to memory of 1608 1200 76423c0da5d1aca1e737da17a2319250.exe 88 PID 1200 wrote to memory of 1608 1200 76423c0da5d1aca1e737da17a2319250.exe 88 PID 1200 wrote to memory of 1608 1200 76423c0da5d1aca1e737da17a2319250.exe 88 PID 1608 wrote to memory of 4156 1608 76423c0da5d1aca1e737da17a2319250.exe 89 PID 1608 wrote to memory of 4156 1608 76423c0da5d1aca1e737da17a2319250.exe 89 PID 1608 wrote to memory of 4156 1608 76423c0da5d1aca1e737da17a2319250.exe 89 PID 1608 wrote to memory of 1452 1608 76423c0da5d1aca1e737da17a2319250.exe 90 PID 1608 wrote to memory of 1452 1608 76423c0da5d1aca1e737da17a2319250.exe 90 PID 1608 wrote to memory of 1452 1608 76423c0da5d1aca1e737da17a2319250.exe 90 PID 1452 wrote to memory of 3028 1452 76423c0da5d1aca1e737da17a2319250.exe 94 PID 1452 wrote to memory of 3028 1452 76423c0da5d1aca1e737da17a2319250.exe 94 PID 1452 wrote to memory of 3028 1452 76423c0da5d1aca1e737da17a2319250.exe 94 PID 1452 wrote to memory of 3028 1452 76423c0da5d1aca1e737da17a2319250.exe 94 PID 1452 wrote to memory of 3028 1452 76423c0da5d1aca1e737da17a2319250.exe 94 PID 1452 wrote to memory of 3028 1452 76423c0da5d1aca1e737da17a2319250.exe 94 PID 1452 wrote to memory of 3028 1452 76423c0da5d1aca1e737da17a2319250.exe 94 PID 1452 wrote to memory of 3028 1452 76423c0da5d1aca1e737da17a2319250.exe 94 PID 1452 wrote to memory of 3028 1452 76423c0da5d1aca1e737da17a2319250.exe 94 PID 1452 wrote to memory of 3028 1452 76423c0da5d1aca1e737da17a2319250.exe 94
Processes
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C:\Users\Admin\AppData\Local\Temp\76423c0da5d1aca1e737da17a2319250.exe"C:\Users\Admin\AppData\Local\Temp\76423c0da5d1aca1e737da17a2319250.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1200 -
C:\Users\Admin\AppData\Local\Temp\76423c0da5d1aca1e737da17a2319250.exe"C:\Users\Admin\AppData\Local\Temp\76423c0da5d1aca1e737da17a2319250.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1608 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\bf7fd6cc-8d11-4f67-b618-ddcca40f9111" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:4156
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C:\Users\Admin\AppData\Local\Temp\76423c0da5d1aca1e737da17a2319250.exe"C:\Users\Admin\AppData\Local\Temp\76423c0da5d1aca1e737da17a2319250.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1452 -
C:\Users\Admin\AppData\Local\Temp\76423c0da5d1aca1e737da17a2319250.exe"C:\Users\Admin\AppData\Local\Temp\76423c0da5d1aca1e737da17a2319250.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:3028
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Filesize1KB
MD58daed5fecd6b7116eb16ea66eda552e0
SHA1bb2149a2541f11dc4da8df7f4579dd65c341ce8b
SHA256076f87f4acbece273de34b83b72bb1a4cf38135f1cf27c49722ce8dfe5c60d71
SHA512eeb7e9bea6db27a316e09dd4cdaae0ccbb3d895e56dad92f54e59a6bb13e450fb6bfb09972f7a23aadba82960af004a7b72852d477b14b80d9d5a68dd6859fc7
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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
MD59881bc3503981557e007f5b40e52cc67
SHA18cdf7fceaf75d08dbc27217829e50bb40d01959e
SHA2562809b34e5219398eaef6d5f55c5b2717fda7bd505b45f8bb0aa7e9d7eab0f434
SHA51279edc28d7d4b3dacac38ffa54361848bbcee7c500351faa776e4a49b05de2ef1467764c497ac07f4727c62c722febf82d1649fa241fb1a46ec6a77c9b76f60ad
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD53469737ead6e8c93b07d8c82a2fba665
SHA1918f05e993aa7470d5db0e5ab90bec8140793b5d
SHA2566abd32e4ab2ef80e4318d2b21935988ba7ef04a9ad2e9db560e25a4aed19274d
SHA5127d4316509d73cb0086948096afa2ac11c0cbadba247ef75a5ee77344c2639aeea765f42151822ea920d36d33c6cf26408b743cff1bc46589d2622dd128e3f944
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C:\Users\Admin\AppData\Local\bf7fd6cc-8d11-4f67-b618-ddcca40f9111\76423c0da5d1aca1e737da17a2319250.exe
Filesize758KB
MD576423c0da5d1aca1e737da17a2319250
SHA1283a5e8ca8c196920b80d6353a1789b205992a8e
SHA256a11ffacad8ded4ac1f3e634d9cdcdda320d075cc6b2e71819958399ddd34b15c
SHA512a0b2fac294e914f1a0c17b4e60daa997d4f6fa5ecf527774ba6c9277ffb09e6510745c9a68cdf044cca62bd3d84944d4c50f641c4360b752e7bdafa536c3a49f