Analysis
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max time kernel
149s -
max time network
132s -
platform
windows10_x64 -
resource
win10v20201028 -
submitted
25-11-2020 14:56
Static task
static1
Behavioral task
behavioral1
Sample
Calculation-438711349-11202020.xls
Resource
win7v20201028
General
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Target
Calculation-438711349-11202020.xls
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Size
62KB
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MD5
182d899cffb334cede36bd37a5fc5730
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SHA1
9f8745527a3fe95eaa6ce0f37088791c88e4d30f
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SHA256
90d873d4a311bcaff6c522cadd137c382aff572144cd2cee4f1873ec851ca8d7
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SHA512
aaebd74aafb0f457152fad1e80b2a15fbcdaf85464616e6621dacb039a50b822da7e583492da64aabda1a9cfcedf7450b16a8304862a801f29ca3b6f9bc2e6ee
Malware Config
Signatures
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Process spawned unexpected child process 1 IoCs
This typically indicates the parent process was compromised via an exploit or macro.
Processes:
rundll32.exedescription pid pid_target process target process Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process 3916 4068 rundll32.exe EXCEL.EXE -
Processes:
resource yara_rule C:\AutoCadest\AutoCadest2\Fiksat.dll cryptone \AutoCadest\AutoCadest2\Fiksat.dll cryptone -
Loads dropped DLL 1 IoCs
Processes:
rundll32.exepid process 2500 rundll32.exe -
Checks SCSI registry key(s) 3 TTPs 6 IoCs
SCSI information is often read in order to detect sandboxing environments.
Processes:
rundll32.exedescription ioc process Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_&Prod_HeartDisk\4&37ce57ba&0&000000\Service rundll32.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CDROM&VEN_SANU&PROD_SANU_DVD-ROM\4&37CE57BA&0&010000 rundll32.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_Sanu&Prod_Sanu_DVD-ROM\4&37ce57ba&0&010000\DeviceDesc rundll32.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_Sanu&Prod_Sanu_DVD-ROM\4&37ce57ba&0&010000\Service rundll32.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\DISK&VEN_&PROD_HEARTDISK\4&37CE57BA&0&000000 rundll32.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_&Prod_HeartDisk\4&37ce57ba&0&000000\DeviceDesc rundll32.exe -
Checks processor information in registry 2 TTPs 3 IoCs
Processor information is often read in order to detect sandboxing environments.
Processes:
EXCEL.EXEdescription ioc process Key opened \REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0 EXCEL.EXE Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz EXCEL.EXE Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString EXCEL.EXE -
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
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Enumerates system info in registry 2 TTPs 3 IoCs
Processes:
EXCEL.EXEdescription ioc process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily EXCEL.EXE Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU EXCEL.EXE Key opened \REGISTRY\MACHINE\Hardware\Description\System\BIOS EXCEL.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
Processes:
EXCEL.EXEpid process 4068 EXCEL.EXE -
Suspicious behavior: EnumeratesProcesses 4 IoCs
Processes:
rundll32.exepid process 2500 rundll32.exe 2500 rundll32.exe 2500 rundll32.exe 2500 rundll32.exe -
Suspicious behavior: MapViewOfSection 1 IoCs
Processes:
rundll32.exepid process 2500 rundll32.exe -
Suspicious use of FindShellTrayWindow 2 IoCs
Processes:
EXCEL.EXEpid process 4068 EXCEL.EXE 4068 EXCEL.EXE -
Suspicious use of SetWindowsHookEx 12 IoCs
Processes:
EXCEL.EXEpid process 4068 EXCEL.EXE 4068 EXCEL.EXE 4068 EXCEL.EXE 4068 EXCEL.EXE 4068 EXCEL.EXE 4068 EXCEL.EXE 4068 EXCEL.EXE 4068 EXCEL.EXE 4068 EXCEL.EXE 4068 EXCEL.EXE 4068 EXCEL.EXE 4068 EXCEL.EXE -
Suspicious use of WriteProcessMemory 13 IoCs
Processes:
EXCEL.EXErundll32.exerundll32.exeexplorer.exedescription pid process target process PID 4068 wrote to memory of 3916 4068 EXCEL.EXE rundll32.exe PID 4068 wrote to memory of 3916 4068 EXCEL.EXE rundll32.exe PID 3916 wrote to memory of 2500 3916 rundll32.exe rundll32.exe PID 3916 wrote to memory of 2500 3916 rundll32.exe rundll32.exe PID 3916 wrote to memory of 2500 3916 rundll32.exe rundll32.exe PID 2500 wrote to memory of 1852 2500 rundll32.exe explorer.exe PID 2500 wrote to memory of 1852 2500 rundll32.exe explorer.exe PID 2500 wrote to memory of 1852 2500 rundll32.exe explorer.exe PID 2500 wrote to memory of 1852 2500 rundll32.exe explorer.exe PID 2500 wrote to memory of 1852 2500 rundll32.exe explorer.exe PID 1852 wrote to memory of 2600 1852 explorer.exe schtasks.exe PID 1852 wrote to memory of 2600 1852 explorer.exe schtasks.exe PID 1852 wrote to memory of 2600 1852 explorer.exe schtasks.exe
Processes
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C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\Calculation-438711349-11202020.xls"1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Windows\SYSTEM32\rundll32.exerundll32 C:\AutoCadest\AutoCadest2\Fiksat.dll, DllRegisterServer2⤵
- Process spawned unexpected child process
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\rundll32.exerundll32 C:\AutoCadest\AutoCadest2\Fiksat.dll, DllRegisterServer3⤵
- Loads dropped DLL
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\explorer.exeC:\Windows\SysWOW64\explorer.exe4⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\schtasks.exe"C:\Windows\system32\schtasks.exe" /Create /RU "NT AUTHORITY\SYSTEM" /tn ohqffycrq /tr "regsvr32.exe -s \"\"" /SC ONCE /Z /ST 15:02 /ET 15:145⤵
- Creates scheduled task(s)
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\??\c:\windows\system32\regsvr32.exeregsvr32.exe -s ""1⤵
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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C:\AutoCadest\AutoCadest2\Fiksat.dllMD5
c4df7d9b0fde36c25032a142eae584d6
SHA1e5147a4c91ff2be4b7e3ce9b5e4233a5eb3f0ccf
SHA25693e282960d37829678090622eb58db30474f5b9ec4b9b5423222b5e5ebfe1bd5
SHA512c4ec87b4ccb04d041ea60786ecf019ccd436793fa0ffe77246db7998bd8f5da17e571daba71a850a0f7a36eb8110eab94b8ac070f128723f494b579b1b419e7d
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\AutoCadest\AutoCadest2\Fiksat.dllMD5
c4df7d9b0fde36c25032a142eae584d6
SHA1e5147a4c91ff2be4b7e3ce9b5e4233a5eb3f0ccf
SHA25693e282960d37829678090622eb58db30474f5b9ec4b9b5423222b5e5ebfe1bd5
SHA512c4ec87b4ccb04d041ea60786ecf019ccd436793fa0ffe77246db7998bd8f5da17e571daba71a850a0f7a36eb8110eab94b8ac070f128723f494b579b1b419e7d
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memory/1852-6-0x0000000000000000-mapping.dmp
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memory/1852-8-0x0000000000740000-0x0000000000760000-memory.dmpFilesize
128KB
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memory/2500-3-0x0000000000000000-mapping.dmp
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memory/2500-5-0x0000000000750000-0x0000000000770000-memory.dmpFilesize
128KB
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memory/2600-7-0x0000000000000000-mapping.dmp
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memory/3916-1-0x0000000000000000-mapping.dmp
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memory/4068-0-0x00007FFED8950000-0x00007FFED8F87000-memory.dmpFilesize
6.2MB