Analysis
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max time kernel
145s -
max time network
144s -
platform
windows7_x64 -
resource
win7v20201028 -
submitted
10-03-2021 16:34
Behavioral task
behavioral1
Sample
Complaint-Letter-1839904529-03102021.xls
Resource
win7v20201028
Behavioral task
behavioral2
Sample
Complaint-Letter-1839904529-03102021.xls
Resource
win10v20201028
General
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Target
Complaint-Letter-1839904529-03102021.xls
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Size
276KB
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MD5
d1b22a745d5efffef5c52928b7f439d6
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SHA1
ba3a1a876978ebdb2a631f644a6b686fafc3c7a3
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SHA256
4ce84c7097fafe010daa73dda77ff17662086505e23b8d4bd11692c9d47896df
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SHA512
0cd10c652a13d1c73da064896e145a7fcc8773cad9e098678bfbe9be7543a81e7b616cd74826d78ebd36ec5842bd27c580c15d5a36109209a26402716a9242ff
Malware Config
Extracted
http://lackenbauer.ru/bd/hhvqjrec/44265.6933299768.dat
http://www.peacezoneacademy.com/dxsbonlv/44265.6933299768.dat
http://jopo.com/gmaaxbro/44265.6933299768.dat
http://www.thegivingwall.co.uk/jfgolx/44265.6933299768.dat
http://baxtercode.com/qkhpnucmzts/44265.6933299768.dat
Signatures
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Process spawned unexpected child process 5 IoCs
This typically indicates the parent process was compromised via an exploit or macro.
Processes:
rundll32.exerundll32.exerundll32.exerundll32.exerundll32.exedescription pid pid_target process target process Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process 616 292 rundll32.exe EXCEL.EXE Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process 1348 292 rundll32.exe EXCEL.EXE Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process 1664 292 rundll32.exe EXCEL.EXE Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process 844 292 rundll32.exe EXCEL.EXE Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process 520 292 rundll32.exe EXCEL.EXE -
Enumerates system info in registry 2 TTPs 1 IoCs
Processes:
EXCEL.EXEdescription ioc process Key opened \REGISTRY\MACHINE\Hardware\Description\System\FloatingPointProcessor EXCEL.EXE -
Processes:
EXCEL.EXEdescription ioc process Key created \REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\Toolbar EXCEL.EXE Set value (str) \REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\ONBttnIE.dll/105" EXCEL.EXE Key created \REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel EXCEL.EXE Set value (int) \REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1" EXCEL.EXE Set value (str) \REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\EXCEL.EXE/3000" EXCEL.EXE Set value (str) \REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes" EXCEL.EXE Key created \REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt EXCEL.EXE Key created \REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote EXCEL.EXE Set value (int) \REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55" EXCEL.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
Processes:
EXCEL.EXEpid process 292 EXCEL.EXE -
Suspicious use of SetWindowsHookEx 3 IoCs
Processes:
EXCEL.EXEpid process 292 EXCEL.EXE 292 EXCEL.EXE 292 EXCEL.EXE -
Suspicious use of WriteProcessMemory 35 IoCs
Processes:
EXCEL.EXEdescription pid process target process PID 292 wrote to memory of 616 292 EXCEL.EXE rundll32.exe PID 292 wrote to memory of 616 292 EXCEL.EXE rundll32.exe PID 292 wrote to memory of 616 292 EXCEL.EXE rundll32.exe PID 292 wrote to memory of 616 292 EXCEL.EXE rundll32.exe PID 292 wrote to memory of 616 292 EXCEL.EXE rundll32.exe PID 292 wrote to memory of 616 292 EXCEL.EXE rundll32.exe PID 292 wrote to memory of 616 292 EXCEL.EXE rundll32.exe PID 292 wrote to memory of 1348 292 EXCEL.EXE rundll32.exe PID 292 wrote to memory of 1348 292 EXCEL.EXE rundll32.exe PID 292 wrote to memory of 1348 292 EXCEL.EXE rundll32.exe PID 292 wrote to memory of 1348 292 EXCEL.EXE rundll32.exe PID 292 wrote to memory of 1348 292 EXCEL.EXE rundll32.exe PID 292 wrote to memory of 1348 292 EXCEL.EXE rundll32.exe PID 292 wrote to memory of 1348 292 EXCEL.EXE rundll32.exe PID 292 wrote to memory of 1664 292 EXCEL.EXE rundll32.exe PID 292 wrote to memory of 1664 292 EXCEL.EXE rundll32.exe PID 292 wrote to memory of 1664 292 EXCEL.EXE rundll32.exe PID 292 wrote to memory of 1664 292 EXCEL.EXE rundll32.exe PID 292 wrote to memory of 1664 292 EXCEL.EXE rundll32.exe PID 292 wrote to memory of 1664 292 EXCEL.EXE rundll32.exe PID 292 wrote to memory of 1664 292 EXCEL.EXE rundll32.exe PID 292 wrote to memory of 844 292 EXCEL.EXE rundll32.exe PID 292 wrote to memory of 844 292 EXCEL.EXE rundll32.exe PID 292 wrote to memory of 844 292 EXCEL.EXE rundll32.exe PID 292 wrote to memory of 844 292 EXCEL.EXE rundll32.exe PID 292 wrote to memory of 844 292 EXCEL.EXE rundll32.exe PID 292 wrote to memory of 844 292 EXCEL.EXE rundll32.exe PID 292 wrote to memory of 844 292 EXCEL.EXE rundll32.exe PID 292 wrote to memory of 520 292 EXCEL.EXE rundll32.exe PID 292 wrote to memory of 520 292 EXCEL.EXE rundll32.exe PID 292 wrote to memory of 520 292 EXCEL.EXE rundll32.exe PID 292 wrote to memory of 520 292 EXCEL.EXE rundll32.exe PID 292 wrote to memory of 520 292 EXCEL.EXE rundll32.exe PID 292 wrote to memory of 520 292 EXCEL.EXE rundll32.exe PID 292 wrote to memory of 520 292 EXCEL.EXE rundll32.exe
Processes
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C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE"C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde C:\Users\Admin\AppData\Local\Temp\Complaint-Letter-1839904529-03102021.xls1⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:292 -
C:\Windows\SysWOW64\rundll32.exerundll32 ..\Runtime.brok,DllRegisterServer2⤵
- Process spawned unexpected child process
PID:616
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C:\Windows\SysWOW64\rundll32.exerundll32 ..\Runtime.brok1,DllRegisterServer2⤵
- Process spawned unexpected child process
PID:1348
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C:\Windows\SysWOW64\rundll32.exerundll32 ..\Runtime.brok2,DllRegisterServer2⤵
- Process spawned unexpected child process
PID:1664
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C:\Windows\SysWOW64\rundll32.exerundll32 ..\Runtime.brok3,DllRegisterServer2⤵
- Process spawned unexpected child process
PID:844
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C:\Windows\SysWOW64\rundll32.exerundll32 ..\Runtime.brok4,DllRegisterServer2⤵
- Process spawned unexpected child process
PID:520
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