Analysis
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max time kernel
85s -
max time network
148s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
04-10-2022 18:35
Behavioral task
behavioral1
Sample
file.exe
Resource
win7-20220812-en
General
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Target
file.exe
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Size
3.2MB
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MD5
81298a52170dd27d8afb431efa78e784
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SHA1
1bad395207cc7769f321a6f6e8a7f149ec3bc34a
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SHA256
e8075dd2f74391aabe1a85eeb7282620b5be0236d6d0a23e7474cf033dd1628a
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SHA512
e1872c02d0029cb68230a3e34677adcb064d4c5f96e1e5ccbe667e5a7cb4e0b92207290154bf62736faa561c33a7b1ff8198fd23742e2bf305c6913050e7c1ea
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SSDEEP
49152:v6Yz51eviu4apbZe5kyPQBUiuCynpwedGcZeZWN2Ejqs9rEwS0DgFypXk8JBo6Xd:v621Y4apNegX9cAM28qpwS0kq0b6Xzh
Malware Config
Extracted
vidar
54.9
1679
https://t.me/larsenup
https://ioc.exchange/@zebra54
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profile_id
1679
Signatures
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Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
Processes:
file.exedescription ioc process Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ file.exe -
Checks BIOS information in registry 2 TTPs 2 IoCs
BIOS information is often read in order to detect sandboxing environments.
Processes:
file.exedescription ioc process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion file.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion file.exe -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
file.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation file.exe -
Loads dropped DLL 2 IoCs
Processes:
file.exepid process 1748 file.exe 1748 file.exe -
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Processes:
resource yara_rule behavioral2/memory/1748-132-0x0000000000F90000-0x0000000001849000-memory.dmp themida behavioral2/memory/1748-133-0x0000000000F90000-0x0000000001849000-memory.dmp themida behavioral2/memory/1748-134-0x0000000000F90000-0x0000000001849000-memory.dmp themida behavioral2/memory/1748-135-0x0000000000F90000-0x0000000001849000-memory.dmp themida behavioral2/memory/1748-136-0x0000000000F90000-0x0000000001849000-memory.dmp themida behavioral2/memory/1748-137-0x0000000000F90000-0x0000000001849000-memory.dmp themida behavioral2/memory/1748-161-0x0000000000F90000-0x0000000001849000-memory.dmp themida -
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
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Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
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Processes:
file.exedescription ioc process Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA file.exe -
Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
Processes:
file.exepid process 1748 file.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
Processes:
file.exedescription ioc process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 file.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString file.exe -
Delays execution with timeout.exe 1 IoCs
Processes:
timeout.exepid process 3124 timeout.exe -
Kills process with taskkill 1 IoCs
Processes:
taskkill.exepid process 4328 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 4 IoCs
Processes:
file.exepid process 1748 file.exe 1748 file.exe 1748 file.exe 1748 file.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
taskkill.exedescription pid process Token: SeDebugPrivilege 4328 taskkill.exe -
Suspicious use of WriteProcessMemory 9 IoCs
Processes:
file.execmd.exedescription pid process target process PID 1748 wrote to memory of 1124 1748 file.exe cmd.exe PID 1748 wrote to memory of 1124 1748 file.exe cmd.exe PID 1748 wrote to memory of 1124 1748 file.exe cmd.exe PID 1124 wrote to memory of 4328 1124 cmd.exe taskkill.exe PID 1124 wrote to memory of 4328 1124 cmd.exe taskkill.exe PID 1124 wrote to memory of 4328 1124 cmd.exe taskkill.exe PID 1124 wrote to memory of 3124 1124 cmd.exe timeout.exe PID 1124 wrote to memory of 3124 1124 cmd.exe timeout.exe PID 1124 wrote to memory of 3124 1124 cmd.exe timeout.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe"1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Checks computer location settings
- Loads dropped DLL
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" C/c taskkill /im file.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\Temp\file.exe" & del C:\PrograData\*.dll & exit2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\taskkill.exetaskkill /im file.exe /f3⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SysWOW64\timeout.exetimeout /t 63⤵
- Delays execution with timeout.exe
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\ProgramData\mozglue.dllFilesize
593KB
MD5c8fd9be83bc728cc04beffafc2907fe9
SHA195ab9f701e0024cedfbd312bcfe4e726744c4f2e
SHA256ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a
SHA512fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040
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C:\ProgramData\nss3.dllFilesize
2.0MB
MD51cc453cdf74f31e4d913ff9c10acdde2
SHA16e85eae544d6e965f15fa5c39700fa7202f3aafe
SHA256ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5
SHA512dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571
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memory/1124-159-0x0000000000000000-mapping.dmp
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memory/1748-135-0x0000000000F90000-0x0000000001849000-memory.dmpFilesize
8.7MB
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memory/1748-136-0x0000000000F90000-0x0000000001849000-memory.dmpFilesize
8.7MB
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memory/1748-137-0x0000000000F90000-0x0000000001849000-memory.dmpFilesize
8.7MB
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memory/1748-138-0x0000000077370000-0x0000000077513000-memory.dmpFilesize
1.6MB
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memory/1748-139-0x0000000061E00000-0x0000000061EF3000-memory.dmpFilesize
972KB
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memory/1748-132-0x0000000000F90000-0x0000000001849000-memory.dmpFilesize
8.7MB
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memory/1748-134-0x0000000000F90000-0x0000000001849000-memory.dmpFilesize
8.7MB
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memory/1748-133-0x0000000000F90000-0x0000000001849000-memory.dmpFilesize
8.7MB
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memory/1748-161-0x0000000000F90000-0x0000000001849000-memory.dmpFilesize
8.7MB
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memory/1748-162-0x0000000077370000-0x0000000077513000-memory.dmpFilesize
1.6MB
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memory/3124-163-0x0000000000000000-mapping.dmp
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memory/4328-160-0x0000000000000000-mapping.dmp