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Analysis
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max time kernel
116s -
max time network
118s -
platform
windows10-1703_x64 -
resource
win10-20220901-en -
resource tags
arch:x64arch:x86image:win10-20220901-enlocale:en-usos:windows10-1703-x64system -
submitted
08/09/2022, 00:32
Static task
static1
Behavioral task
behavioral1
Sample
7f9b3ea0c203cc78f09f4df8f9c16593d991ec2ad92a40f85daa7fa6d828be02.exe
Resource
win10-20220901-en
General
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Target
7f9b3ea0c203cc78f09f4df8f9c16593d991ec2ad92a40f85daa7fa6d828be02.exe
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Size
777KB
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MD5
66cc9fbec507f68ed5a09f518bc775ed
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SHA1
16c964678f51f0e33d5e288b4e7750a5cb687f7f
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SHA256
7f9b3ea0c203cc78f09f4df8f9c16593d991ec2ad92a40f85daa7fa6d828be02
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SHA512
024e5a2bc49df64d1b3a8b39d026643074ac73d34dac6d4b26e02176199378cd4f817d08b5f48ea0702c6b536f3c2666243c2c3b6830f35ae5f4f40747d19215
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SSDEEP
24576:Qn/Uc6+rxsOtAiu7TJPBkLnWYbE56l8ahmp:Qnx1srJZD8au8ahmp
Malware Config
Extracted
djvu
http://acacaca.org/test1/get.php
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extension
.mmpu
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offline_id
yd6oYv6aBN90yFzTWdZ34sXSXtXiauzOLXZyWht1
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payload_url
http://rgyui.top/dl/build2.exe
http://acacaca.org/files/1/build3.exe
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ransomnote
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Signatures
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Detected Djvu ransomware 9 IoCs
resource yara_rule behavioral1/memory/2704-146-0x0000000002720000-0x000000000283B000-memory.dmp family_djvu behavioral1/memory/4736-150-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4736-151-0x0000000000424141-mapping.dmp family_djvu behavioral1/memory/4736-157-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4736-197-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4736-251-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3144-277-0x0000000000424141-mapping.dmp family_djvu behavioral1/memory/3144-350-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3144-387-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu -
Djvu Ransomware
Ransomware which is a variant of the STOP family.
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Downloads MZ/PE file
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Executes dropped EXE 1 IoCs
pid Process 4280 build2.exe -
Modifies file permissions 1 TTPs 1 IoCs
pid Process 3928 icacls.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2368682536-4045190062-1465778271-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\72ade55a-64b9-4a06-a21c-db1dc87109f4\\7f9b3ea0c203cc78f09f4df8f9c16593d991ec2ad92a40f85daa7fa6d828be02.exe\" --AutoStart" 7f9b3ea0c203cc78f09f4df8f9c16593d991ec2ad92a40f85daa7fa6d828be02.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 14 api.2ip.ua 6 api.2ip.ua 7 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 2704 set thread context of 4736 2704 7f9b3ea0c203cc78f09f4df8f9c16593d991ec2ad92a40f85daa7fa6d828be02.exe 66 PID 4756 set thread context of 3144 4756 7f9b3ea0c203cc78f09f4df8f9c16593d991ec2ad92a40f85daa7fa6d828be02.exe 70 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Suspicious behavior: EnumeratesProcesses 4 IoCs
pid Process 4736 7f9b3ea0c203cc78f09f4df8f9c16593d991ec2ad92a40f85daa7fa6d828be02.exe 4736 7f9b3ea0c203cc78f09f4df8f9c16593d991ec2ad92a40f85daa7fa6d828be02.exe 3144 7f9b3ea0c203cc78f09f4df8f9c16593d991ec2ad92a40f85daa7fa6d828be02.exe 3144 7f9b3ea0c203cc78f09f4df8f9c16593d991ec2ad92a40f85daa7fa6d828be02.exe -
Suspicious use of WriteProcessMemory 29 IoCs
description pid Process procid_target PID 2704 wrote to memory of 4736 2704 7f9b3ea0c203cc78f09f4df8f9c16593d991ec2ad92a40f85daa7fa6d828be02.exe 66 PID 2704 wrote to memory of 4736 2704 7f9b3ea0c203cc78f09f4df8f9c16593d991ec2ad92a40f85daa7fa6d828be02.exe 66 PID 2704 wrote to memory of 4736 2704 7f9b3ea0c203cc78f09f4df8f9c16593d991ec2ad92a40f85daa7fa6d828be02.exe 66 PID 2704 wrote to memory of 4736 2704 7f9b3ea0c203cc78f09f4df8f9c16593d991ec2ad92a40f85daa7fa6d828be02.exe 66 PID 2704 wrote to memory of 4736 2704 7f9b3ea0c203cc78f09f4df8f9c16593d991ec2ad92a40f85daa7fa6d828be02.exe 66 PID 2704 wrote to memory of 4736 2704 7f9b3ea0c203cc78f09f4df8f9c16593d991ec2ad92a40f85daa7fa6d828be02.exe 66 PID 2704 wrote to memory of 4736 2704 7f9b3ea0c203cc78f09f4df8f9c16593d991ec2ad92a40f85daa7fa6d828be02.exe 66 PID 2704 wrote to memory of 4736 2704 7f9b3ea0c203cc78f09f4df8f9c16593d991ec2ad92a40f85daa7fa6d828be02.exe 66 PID 2704 wrote to memory of 4736 2704 7f9b3ea0c203cc78f09f4df8f9c16593d991ec2ad92a40f85daa7fa6d828be02.exe 66 PID 2704 wrote to memory of 4736 2704 7f9b3ea0c203cc78f09f4df8f9c16593d991ec2ad92a40f85daa7fa6d828be02.exe 66 PID 4736 wrote to memory of 3928 4736 7f9b3ea0c203cc78f09f4df8f9c16593d991ec2ad92a40f85daa7fa6d828be02.exe 67 PID 4736 wrote to memory of 3928 4736 7f9b3ea0c203cc78f09f4df8f9c16593d991ec2ad92a40f85daa7fa6d828be02.exe 67 PID 4736 wrote to memory of 3928 4736 7f9b3ea0c203cc78f09f4df8f9c16593d991ec2ad92a40f85daa7fa6d828be02.exe 67 PID 4736 wrote to memory of 4756 4736 7f9b3ea0c203cc78f09f4df8f9c16593d991ec2ad92a40f85daa7fa6d828be02.exe 68 PID 4736 wrote to memory of 4756 4736 7f9b3ea0c203cc78f09f4df8f9c16593d991ec2ad92a40f85daa7fa6d828be02.exe 68 PID 4736 wrote to memory of 4756 4736 7f9b3ea0c203cc78f09f4df8f9c16593d991ec2ad92a40f85daa7fa6d828be02.exe 68 PID 4756 wrote to memory of 3144 4756 7f9b3ea0c203cc78f09f4df8f9c16593d991ec2ad92a40f85daa7fa6d828be02.exe 70 PID 4756 wrote to memory of 3144 4756 7f9b3ea0c203cc78f09f4df8f9c16593d991ec2ad92a40f85daa7fa6d828be02.exe 70 PID 4756 wrote to memory of 3144 4756 7f9b3ea0c203cc78f09f4df8f9c16593d991ec2ad92a40f85daa7fa6d828be02.exe 70 PID 4756 wrote to memory of 3144 4756 7f9b3ea0c203cc78f09f4df8f9c16593d991ec2ad92a40f85daa7fa6d828be02.exe 70 PID 4756 wrote to memory of 3144 4756 7f9b3ea0c203cc78f09f4df8f9c16593d991ec2ad92a40f85daa7fa6d828be02.exe 70 PID 4756 wrote to memory of 3144 4756 7f9b3ea0c203cc78f09f4df8f9c16593d991ec2ad92a40f85daa7fa6d828be02.exe 70 PID 4756 wrote to memory of 3144 4756 7f9b3ea0c203cc78f09f4df8f9c16593d991ec2ad92a40f85daa7fa6d828be02.exe 70 PID 4756 wrote to memory of 3144 4756 7f9b3ea0c203cc78f09f4df8f9c16593d991ec2ad92a40f85daa7fa6d828be02.exe 70 PID 4756 wrote to memory of 3144 4756 7f9b3ea0c203cc78f09f4df8f9c16593d991ec2ad92a40f85daa7fa6d828be02.exe 70 PID 4756 wrote to memory of 3144 4756 7f9b3ea0c203cc78f09f4df8f9c16593d991ec2ad92a40f85daa7fa6d828be02.exe 70 PID 3144 wrote to memory of 4280 3144 7f9b3ea0c203cc78f09f4df8f9c16593d991ec2ad92a40f85daa7fa6d828be02.exe 71 PID 3144 wrote to memory of 4280 3144 7f9b3ea0c203cc78f09f4df8f9c16593d991ec2ad92a40f85daa7fa6d828be02.exe 71 PID 3144 wrote to memory of 4280 3144 7f9b3ea0c203cc78f09f4df8f9c16593d991ec2ad92a40f85daa7fa6d828be02.exe 71
Processes
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C:\Users\Admin\AppData\Local\Temp\7f9b3ea0c203cc78f09f4df8f9c16593d991ec2ad92a40f85daa7fa6d828be02.exe"C:\Users\Admin\AppData\Local\Temp\7f9b3ea0c203cc78f09f4df8f9c16593d991ec2ad92a40f85daa7fa6d828be02.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2704 -
C:\Users\Admin\AppData\Local\Temp\7f9b3ea0c203cc78f09f4df8f9c16593d991ec2ad92a40f85daa7fa6d828be02.exe"C:\Users\Admin\AppData\Local\Temp\7f9b3ea0c203cc78f09f4df8f9c16593d991ec2ad92a40f85daa7fa6d828be02.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4736 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\72ade55a-64b9-4a06-a21c-db1dc87109f4" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:3928
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C:\Users\Admin\AppData\Local\Temp\7f9b3ea0c203cc78f09f4df8f9c16593d991ec2ad92a40f85daa7fa6d828be02.exe"C:\Users\Admin\AppData\Local\Temp\7f9b3ea0c203cc78f09f4df8f9c16593d991ec2ad92a40f85daa7fa6d828be02.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4756 -
C:\Users\Admin\AppData\Local\Temp\7f9b3ea0c203cc78f09f4df8f9c16593d991ec2ad92a40f85daa7fa6d828be02.exe"C:\Users\Admin\AppData\Local\Temp\7f9b3ea0c203cc78f09f4df8f9c16593d991ec2ad92a40f85daa7fa6d828be02.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3144 -
C:\Users\Admin\AppData\Local\fe6f4fad-e233-435f-b1f5-bd4ee671b410\build2.exe"C:\Users\Admin\AppData\Local\fe6f4fad-e233-435f-b1f5-bd4ee671b410\build2.exe"5⤵
- Executes dropped EXE
PID:4280
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
Filesize2KB
MD59cd19ed49787d5bf969ac81a2dbf7ce9
SHA14ff7b3372f9778f210014bdd7989d6f9442caa37
SHA2565e317a2565c34c5d13efedd5a58537a9f255df17457a567e5fcc061962475b22
SHA512589a98c719b6f67e875cc05438d4801d8025e8661bc30d51351df864314f0f4e5f35aa27422954a43eddd9ca04903043b46a47335311586f709e8eeae87cf7b9
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
Filesize1KB
MD57c27ffae0cbd6d55b86f387667635294
SHA16df10a537a970852086711da85ae84f7355bff72
SHA256b6a9400010fea1af51104c2b48fdd4383d8b7a81bd62a22c188db3cdb7413503
SHA512140752fd448ed5cd01c5463d67b7dd2c5c111fd4256d3686b792bc0ff788bed49fdfe901402fdb080b9a6c0789725dda6256280120fadc5aca1f127a552e13d6
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
Filesize488B
MD545ba889bc03744b344c86bfa37faf452
SHA1586a152f3da6366983799c5ad421896861845d72
SHA25622f597e71997734424f25a2fad2b8192d9f7afac60873a5d235f42cc480229d0
SHA512b2306a75bfd61165e8687ed377a62cf8aef9a4526bc1cc68acb62514de858b82e21c9628aca4f60eb26dafd7daab426ba904d3c8703fcc44253ae97eaef94830
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
Filesize482B
MD52874821a4920ba558a516a34637a064d
SHA1165e65c3ab8cfda53e0628ef3c71380e3457fded
SHA2563a734ecc813298a704b52def82b8e98fa7e60bbd3a45f5a88c6e769c5f0b2867
SHA512226e52d5da5eeb93a1f98a386e9bd4b037a40c0b19759d8a318a5e6b9cd71d4f8ceaa5eff32efa046673cd1e22540c9829bb2ce9ff86a9051eec41f9e8431dc1
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C:\Users\Admin\AppData\Local\72ade55a-64b9-4a06-a21c-db1dc87109f4\7f9b3ea0c203cc78f09f4df8f9c16593d991ec2ad92a40f85daa7fa6d828be02.exe
Filesize777KB
MD566cc9fbec507f68ed5a09f518bc775ed
SHA116c964678f51f0e33d5e288b4e7750a5cb687f7f
SHA2567f9b3ea0c203cc78f09f4df8f9c16593d991ec2ad92a40f85daa7fa6d828be02
SHA512024e5a2bc49df64d1b3a8b39d026643074ac73d34dac6d4b26e02176199378cd4f817d08b5f48ea0702c6b536f3c2666243c2c3b6830f35ae5f4f40747d19215
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Filesize
383KB
MD58d7db6982df46c3b0f0cc879d892c08a
SHA164e3d7ab4793aeb05d18a82159c579e05c45fd71
SHA256116e15e94d70dde65f91f155580bd9b34ff1956b9ebe1a53b6bce912b281c1f6
SHA5120eeb242e6e1356a2a9e3183f12439ef36fac40e27ac8c0df5f591c7b3c1324145627c92c3fee15aedee2c1e8cc3b966152af73a33196166c2c1bfbbd979bdb5b
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Filesize
383KB
MD58d7db6982df46c3b0f0cc879d892c08a
SHA164e3d7ab4793aeb05d18a82159c579e05c45fd71
SHA256116e15e94d70dde65f91f155580bd9b34ff1956b9ebe1a53b6bce912b281c1f6
SHA5120eeb242e6e1356a2a9e3183f12439ef36fac40e27ac8c0df5f591c7b3c1324145627c92c3fee15aedee2c1e8cc3b966152af73a33196166c2c1bfbbd979bdb5b