Analysis
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max time kernel
150s -
max time network
131s -
platform
windows10_x64 -
resource
win10v20210410 -
submitted
29-06-2021 22:04
Behavioral task
behavioral1
Sample
plan-515372324.xlsb
Resource
win7v20210408
Behavioral task
behavioral2
Sample
plan-515372324.xlsb
Resource
win10v20210410
General
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Target
plan-515372324.xlsb
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Size
155KB
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MD5
08e52afbefa423fb9f1ea0af88a4880e
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SHA1
2d688dfee28f75553bc1d3633f891d2e70e0408b
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SHA256
aaa32ff3e41c61fe828f0850e702f5ed7ffd6177c4bf80ed15324525537f44cd
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SHA512
7a5400ec826ecaa0fa6a8beb9022bd9e918f11cf97e57d747477720889f7203af983620e2f7b543fb1ff5cc5a9eff13447d6353506c862dfe2ebd23b7a63dee8
Malware Config
Extracted
https://khangland.pro/v8gEDeSB/sun.html
https://jaipurbynite.com/stLdQs9R53/sun.htm
Signatures
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Process spawned unexpected child process 2 IoCs
This typically indicates the parent process was compromised via an exploit or macro.
Processes:
regsvr32.exeregsvr32.exedescription pid pid_target process target process Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process 3148 3236 regsvr32.exe EXCEL.EXE Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process 2192 3236 regsvr32.exe EXCEL.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 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 Key opened \REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0 EXCEL.EXE -
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 3236 EXCEL.EXE -
Suspicious use of FindShellTrayWindow 2 IoCs
Processes:
EXCEL.EXEpid process 3236 EXCEL.EXE 3236 EXCEL.EXE -
Suspicious use of SetWindowsHookEx 14 IoCs
Processes:
EXCEL.EXEpid process 3236 EXCEL.EXE 3236 EXCEL.EXE 3236 EXCEL.EXE 3236 EXCEL.EXE 3236 EXCEL.EXE 3236 EXCEL.EXE 3236 EXCEL.EXE 3236 EXCEL.EXE 3236 EXCEL.EXE 3236 EXCEL.EXE 3236 EXCEL.EXE 3236 EXCEL.EXE 3236 EXCEL.EXE 3236 EXCEL.EXE -
Suspicious use of WriteProcessMemory 6 IoCs
Processes:
EXCEL.EXEdescription pid process target process PID 3236 wrote to memory of 3800 3236 EXCEL.EXE splwow64.exe PID 3236 wrote to memory of 3800 3236 EXCEL.EXE splwow64.exe PID 3236 wrote to memory of 3148 3236 EXCEL.EXE regsvr32.exe PID 3236 wrote to memory of 3148 3236 EXCEL.EXE regsvr32.exe PID 3236 wrote to memory of 2192 3236 EXCEL.EXE regsvr32.exe PID 3236 wrote to memory of 2192 3236 EXCEL.EXE regsvr32.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\plan-515372324.xlsb"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\splwow64.exeC:\Windows\splwow64.exe 122882⤵
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C:\Windows\SYSTEM32\regsvr32.exeregsvr32 ..\palpy1.dll2⤵
- Process spawned unexpected child process
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C:\Windows\SYSTEM32\regsvr32.exeregsvr32 ..\palpy2.dll2⤵
- Process spawned unexpected child process
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
Loading Replay Monitor...
Downloads
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memory/2192-181-0x0000000000000000-mapping.dmp
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memory/3148-180-0x0000000000000000-mapping.dmp
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memory/3236-114-0x00007FF6FE240000-0x00007FF7017F6000-memory.dmpFilesize
53.7MB
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memory/3236-115-0x00007FFA08250000-0x00007FFA08260000-memory.dmpFilesize
64KB
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memory/3236-116-0x00007FFA08250000-0x00007FFA08260000-memory.dmpFilesize
64KB
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memory/3236-117-0x00007FFA08250000-0x00007FFA08260000-memory.dmpFilesize
64KB
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memory/3236-118-0x00007FFA08250000-0x00007FFA08260000-memory.dmpFilesize
64KB
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memory/3236-119-0x00007FFA08250000-0x00007FFA08260000-memory.dmpFilesize
64KB
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memory/3236-122-0x00007FFA28EA0000-0x00007FFA29F8E000-memory.dmpFilesize
16.9MB
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memory/3236-123-0x00007FFA26EE0000-0x00007FFA28DD5000-memory.dmpFilesize
31.0MB
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memory/3800-179-0x0000000000000000-mapping.dmp