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Analysis
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max time kernel
141s -
max time network
149s -
platform
windows10-2004_x64 -
resource
win10v2004-20231020-en -
resource tags
arch:x64arch:x86image:win10v2004-20231020-enlocale:en-usos:windows10-2004-x64system -
submitted
30/10/2023, 20:00
Static task
static1
Behavioral task
behavioral1
Sample
18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe
Resource
win10v2004-20231020-en
General
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Target
18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe
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Size
744KB
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MD5
e8a6862182b58ef511dd4df313ec615f
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SHA1
4eda4c23199853a52b75d371661a16295893538e
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SHA256
18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0
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SHA512
0b86cf445c39b5c192affa6b5de4fa72db640f35450b5096f5c16dfa5f6c7c5ab6c705db6cc6f195f563ce73b65339c2889640956ae04d9b314e7e606435e5f4
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SSDEEP
12288:JCwQ/y/heWvm5JJXhaHC+/5Kht0JGqudDafejZrvXYC0j91Hjjpd3y:J1b/heWvmRhaHDRKz0JjsDnpI7jNFy
Malware Config
Extracted
djvu
http://zexeq.com/test1/get.php
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extension
.ppvs
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offline_id
phJtdHo970vyx7vwlYG00OakDR75RuJz7NXDArt1
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payload_url
http://colisumy.com/dl/build2.exe
http://zexeq.com/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/4052-2-0x0000000002790000-0x00000000028AB000-memory.dmp family_djvu behavioral1/memory/5084-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/5084-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/5084-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/5084-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/5084-15-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1700-20-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1700-21-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1700-23-0x0000000000400000-0x0000000000537000-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-1-5-21-1873812795-1433807462-1429862679-1000\Control Panel\International\Geo\Nation 18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe -
Modifies file permissions 1 TTPs 1 IoCs
pid Process 4204 icacls.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-1873812795-1433807462-1429862679-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\54dbd4bb-0dd1-46eb-bb4f-ceadf2a5a33b\\18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe\" --AutoStart" 18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe -
Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
flow ioc 36 api.2ip.ua 37 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 4052 set thread context of 5084 4052 18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe 89 PID 4444 set thread context of 1700 4444 18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe 100 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Program crash 1 IoCs
pid pid_target Process procid_target 3696 1700 WerFault.exe 100 -
Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 5084 18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe 5084 18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe -
Suspicious use of WriteProcessMemory 26 IoCs
description pid Process procid_target PID 4052 wrote to memory of 5084 4052 18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe 89 PID 4052 wrote to memory of 5084 4052 18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe 89 PID 4052 wrote to memory of 5084 4052 18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe 89 PID 4052 wrote to memory of 5084 4052 18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe 89 PID 4052 wrote to memory of 5084 4052 18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe 89 PID 4052 wrote to memory of 5084 4052 18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe 89 PID 4052 wrote to memory of 5084 4052 18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe 89 PID 4052 wrote to memory of 5084 4052 18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe 89 PID 4052 wrote to memory of 5084 4052 18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe 89 PID 4052 wrote to memory of 5084 4052 18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe 89 PID 5084 wrote to memory of 4204 5084 18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe 96 PID 5084 wrote to memory of 4204 5084 18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe 96 PID 5084 wrote to memory of 4204 5084 18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe 96 PID 5084 wrote to memory of 4444 5084 18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe 97 PID 5084 wrote to memory of 4444 5084 18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe 97 PID 5084 wrote to memory of 4444 5084 18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe 97 PID 4444 wrote to memory of 1700 4444 18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe 100 PID 4444 wrote to memory of 1700 4444 18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe 100 PID 4444 wrote to memory of 1700 4444 18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe 100 PID 4444 wrote to memory of 1700 4444 18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe 100 PID 4444 wrote to memory of 1700 4444 18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe 100 PID 4444 wrote to memory of 1700 4444 18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe 100 PID 4444 wrote to memory of 1700 4444 18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe 100 PID 4444 wrote to memory of 1700 4444 18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe 100 PID 4444 wrote to memory of 1700 4444 18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe 100 PID 4444 wrote to memory of 1700 4444 18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe 100
Processes
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C:\Users\Admin\AppData\Local\Temp\18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe"C:\Users\Admin\AppData\Local\Temp\18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4052 -
C:\Users\Admin\AppData\Local\Temp\18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe"C:\Users\Admin\AppData\Local\Temp\18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:5084 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\54dbd4bb-0dd1-46eb-bb4f-ceadf2a5a33b" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:4204
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C:\Users\Admin\AppData\Local\Temp\18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe"C:\Users\Admin\AppData\Local\Temp\18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4444 -
C:\Users\Admin\AppData\Local\Temp\18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe"C:\Users\Admin\AppData\Local\Temp\18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe" --Admin IsNotAutoStart IsNotTask4⤵PID:1700
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1700 -s 2165⤵
- Program crash
PID:3696
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 1700 -ip 17001⤵PID:3080
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\54dbd4bb-0dd1-46eb-bb4f-ceadf2a5a33b\18354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0.exe
Filesize744KB
MD5e8a6862182b58ef511dd4df313ec615f
SHA14eda4c23199853a52b75d371661a16295893538e
SHA25618354c2b4148b844b6eaad8ea2be1c10e89731d1cc360617718902f74f39a1e0
SHA5120b86cf445c39b5c192affa6b5de4fa72db640f35450b5096f5c16dfa5f6c7c5ab6c705db6cc6f195f563ce73b65339c2889640956ae04d9b314e7e606435e5f4