Analysis
- max time kernel
142s - max time network
145s - platform
windows10_x64 - resource
win10v20210408 - submitted
06/09/2021, 06:40
Static task
static1
Behavioral task
behavioral1
Sample
80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe
Resource
win7-en
Behavioral task
behavioral2
Sample
80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe
Resource
win10v20210408
General
- Target 80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe
- Size 791KB
- Sample210906-he9vpsdfhp
- SHA256 80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b
- MD5 8b57e3d9d1390965bb10341f2f086c9b
- SHA1 41a14e89089e0bd85b4e9c61bdb17abdd70eb0b4
- SHA512 f2c1d9be9b3370c29703bbc4a7ac83fbeb3ac5752d8c69d25630ebd27a46fa0e969061cd9e45555d6522fe575fc6d2fcf761faa04caeaa5ddae2e136b711c171
- MD5 SHA1 SHA512
Malware Config
Extracted
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vidar
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40.4
-
517
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https://romkaxarit.tumblr.com/
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profile_id
517
Signatures
- Detected Djvu ransomeware 8 IoCs
resource yara_rule behavioral2/memory/2716-114-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2716-115-0x0000000000424141-mapping.dmp family_djvu behavioral2/memory/2716-117-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/776-116-0x0000000004130000-0x000000000424B000-memory.dmp family_djvu behavioral2/memory/1368-122-0x0000000000424141-mapping.dmp family_djvu behavioral2/memory/1368-127-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/740-149-0x0000000000424141-mapping.dmp family_djvu behavioral2/memory/740-151-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu - Djvu Ransomware
Ransomware which is a variant of the STOP family.
- suricata: ET MALWARE Potential Dridex.Maldoc Minimal Executable Request
suricata: ET MALWARE Potential Dridex.Maldoc Minimal Executable Request
- suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)
suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)
- suricata: ET MALWARE Vidar/Arkei Stealer Client Data Upload
suricata: ET MALWARE Vidar/Arkei Stealer Client Data Upload
- suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil
suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil
- Vidar Stealer 4 IoCs
resource yara_rule behavioral2/memory/2836-132-0x000000000049ECBD-mapping.dmp family_vidar behavioral2/memory/2836-131-0x0000000000400000-0x00000000004D7000-memory.dmp family_vidar behavioral2/memory/2836-135-0x0000000000400000-0x00000000004D7000-memory.dmp family_vidar behavioral2/memory/3796-134-0x00000000046A0000-0x0000000004773000-memory.dmp family_vidar - Downloads MZ/PE file
- Executes dropped EXE 4 IoCs
pid Process 3796 build2.exe 2836 build2.exe 3960 80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe 740 80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe - Loads dropped DLL 2 IoCs
pid Process 2836 build2.exe 2836 build2.exe - Modifies file permissions 1 TTPs 1 IoCs
pid Process 4092 icacls.exe - Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
- Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\efaeba4f-b37d-42d9-aad6-59fa6492c2d7\\80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe\" --AutoStart" 80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe - Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
- Looks up external IP address via web service 4 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
flow ioc 10 api.2ip.ua 11 api.2ip.ua 18 api.2ip.ua 39 api.2ip.ua - Suspicious use of SetThreadContext 4 IoCs
description pid Process procid_target PID 776 set thread context of 2716 776 80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe 75 PID 1296 set thread context of 1368 1296 80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe 79 PID 3796 set thread context of 2836 3796 build2.exe 83 PID 3960 set thread context of 740 3960 80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe 90 - Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
description ioc Process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 build2.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString build2.exe - Delays execution with timeout.exe 1 IoCs
pid Process 2200 timeout.exe - Kills process with taskkill 1 IoCs
pid Process 3508 taskkill.exe -
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349 80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe Set value (data) \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349\Blob = 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 80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe - Suspicious behavior: EnumeratesProcesses 14 IoCs
pid Process 2716 80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe 2716 80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe 1368 80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe 1368 80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe 2836 build2.exe 2836 build2.exe 2836 build2.exe 2836 build2.exe 2836 build2.exe 2836 build2.exe 2836 build2.exe 2836 build2.exe 740 80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe 740 80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe - Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 3508 taskkill.exe - Suspicious use of WriteProcessMemory 56 IoCs
description pid Process procid_target PID 776 wrote to memory of 2716 776 80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe 75 PID 776 wrote to memory of 2716 776 80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe 75 PID 776 wrote to memory of 2716 776 80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe 75 PID 776 wrote to memory of 2716 776 80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe 75 PID 776 wrote to memory of 2716 776 80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe 75 PID 776 wrote to memory of 2716 776 80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe 75 PID 776 wrote to memory of 2716 776 80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe 75 PID 776 wrote to memory of 2716 776 80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe 75 PID 776 wrote to memory of 2716 776 80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe 75 PID 776 wrote to memory of 2716 776 80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe 75 PID 2716 wrote to memory of 4092 2716 80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe 76 PID 2716 wrote to memory of 4092 2716 80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe 76 PID 2716 wrote to memory of 4092 2716 80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe 76 PID 2716 wrote to memory of 1296 2716 80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe 77 PID 2716 wrote to memory of 1296 2716 80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe 77 PID 2716 wrote to memory of 1296 2716 80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe 77 PID 1296 wrote to memory of 1368 1296 80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe 79 PID 1296 wrote to memory of 1368 1296 80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe 79 PID 1296 wrote to memory of 1368 1296 80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe 79 PID 1296 wrote to memory of 1368 1296 80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe 79 PID 1296 wrote to memory of 1368 1296 80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe 79 PID 1296 wrote to memory of 1368 1296 80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe 79 PID 1296 wrote to memory of 1368 1296 80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe 79 PID 1296 wrote to memory of 1368 1296 80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe 79 PID 1296 wrote to memory of 1368 1296 80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe 79 PID 1296 wrote to memory of 1368 1296 80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe 79 PID 1368 wrote to memory of 3796 1368 80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe 82 PID 1368 wrote to memory of 3796 1368 80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe 82 PID 1368 wrote to memory of 3796 1368 80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe 82 PID 3796 wrote to memory of 2836 3796 build2.exe 83 PID 3796 wrote to memory of 2836 3796 build2.exe 83 PID 3796 wrote to memory of 2836 3796 build2.exe 83 PID 3796 wrote to memory of 2836 3796 build2.exe 83 PID 3796 wrote to memory of 2836 3796 build2.exe 83 PID 3796 wrote to memory of 2836 3796 build2.exe 83 PID 3796 wrote to memory of 2836 3796 build2.exe 83 PID 3796 wrote to memory of 2836 3796 build2.exe 83 PID 2836 wrote to memory of 1804 2836 build2.exe 85 PID 2836 wrote to memory of 1804 2836 build2.exe 85 PID 2836 wrote to memory of 1804 2836 build2.exe 85 PID 1804 wrote to memory of 3508 1804 cmd.exe 87 PID 1804 wrote to memory of 3508 1804 cmd.exe 87 PID 1804 wrote to memory of 3508 1804 cmd.exe 87 PID 1804 wrote to memory of 2200 1804 cmd.exe 88 PID 1804 wrote to memory of 2200 1804 cmd.exe 88 PID 1804 wrote to memory of 2200 1804 cmd.exe 88 PID 3960 wrote to memory of 740 3960 80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe 90 PID 3960 wrote to memory of 740 3960 80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe 90 PID 3960 wrote to memory of 740 3960 80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe 90 PID 3960 wrote to memory of 740 3960 80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe 90 PID 3960 wrote to memory of 740 3960 80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe 90 PID 3960 wrote to memory of 740 3960 80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe 90 PID 3960 wrote to memory of 740 3960 80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe 90 PID 3960 wrote to memory of 740 3960 80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe 90 PID 3960 wrote to memory of 740 3960 80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe 90 PID 3960 wrote to memory of 740 3960 80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe 90
Processes
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C:\Users\Admin\AppData\Local\Temp\80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe"C:\Users\Admin\AppData\Local\Temp\80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:776 -
C:\Users\Admin\AppData\Local\Temp\80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe"C:\Users\Admin\AppData\Local\Temp\80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe"2⤵
- Adds Run key to start application
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2716 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\efaeba4f-b37d-42d9-aad6-59fa6492c2d7" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:4092
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C:\Users\Admin\AppData\Local\Temp\80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe"C:\Users\Admin\AppData\Local\Temp\80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1296 -
C:\Users\Admin\AppData\Local\Temp\80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe"C:\Users\Admin\AppData\Local\Temp\80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1368 -
C:\Users\Admin\AppData\Local\ea0e0bd5-937b-49da-afae-eeccdb95419a\build2.exe"C:\Users\Admin\AppData\Local\ea0e0bd5-937b-49da-afae-eeccdb95419a\build2.exe"5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3796 -
C:\Users\Admin\AppData\Local\ea0e0bd5-937b-49da-afae-eeccdb95419a\build2.exe"C:\Users\Admin\AppData\Local\ea0e0bd5-937b-49da-afae-eeccdb95419a\build2.exe"6⤵
- Executes dropped EXE
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2836 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c taskkill /im build2.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\ea0e0bd5-937b-49da-afae-eeccdb95419a\build2.exe" & del C:\ProgramData\*.dll & exit7⤵
- Suspicious use of WriteProcessMemory
PID:1804 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im build2.exe /f8⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:3508
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C:\Windows\SysWOW64\timeout.exetimeout /t 68⤵
- Delays execution with timeout.exe
PID:2200
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C:\Users\Admin\AppData\Local\efaeba4f-b37d-42d9-aad6-59fa6492c2d7\80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exeC:\Users\Admin\AppData\Local\efaeba4f-b37d-42d9-aad6-59fa6492c2d7\80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe --Task1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3960 -
C:\Users\Admin\AppData\Local\efaeba4f-b37d-42d9-aad6-59fa6492c2d7\80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exeC:\Users\Admin\AppData\Local\efaeba4f-b37d-42d9-aad6-59fa6492c2d7\80b466356d8bf0d46cdf2b592edf646050e9617902a5efdb3a4a3ceba8c6856b.exe --Task2⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
PID:740
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