Analysis
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max time kernel
69s -
max time network
10s -
platform
windows7_x64 -
resource
win7v20201028 -
submitted
15-03-2021 14:26
Behavioral task
behavioral1
Sample
document-1933373955.xls
Resource
win7v20201028
windows7_x64
0 signatures
0 seconds
Behavioral task
behavioral2
Sample
document-1933373955.xls
Resource
win10v20201028
windows10_x64
0 signatures
0 seconds
General
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Target
document-1933373955.xls
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Size
139KB
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MD5
491f8f076ee4c8504ab091dc301ff206
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SHA1
1fc006182c646b1fbed9315e7831be630351137b
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SHA256
dd3bbce4c5ad7dd71ad4c5664758d6529a241ef2b48241d18b5a87b5c53760ea
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SHA512
9a6efd189affe8599ecc50f592a8e1c281a631fcb97f2e48ad6571be483586ad4e2291de68df184269b13c8c2586d181fd8f973f519c95701f48b62fdf1b6f4a
Score
10/10
Malware Config
Extracted
Language
xlm4.0
Source
URLs
xlm40.dropper
http://zltw15tzezi03nbmru.xyz/w.gif
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 (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process 556 1932 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\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 (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 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 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 (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 (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 -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
Processes:
EXCEL.EXEpid process 1932 EXCEL.EXE -
Suspicious use of SetWindowsHookEx 3 IoCs
Processes:
EXCEL.EXEpid process 1932 EXCEL.EXE 1932 EXCEL.EXE 1932 EXCEL.EXE -
Suspicious use of WriteProcessMemory 7 IoCs
Processes:
EXCEL.EXEdescription pid process target process PID 1932 wrote to memory of 556 1932 EXCEL.EXE rundll32.exe PID 1932 wrote to memory of 556 1932 EXCEL.EXE rundll32.exe PID 1932 wrote to memory of 556 1932 EXCEL.EXE rundll32.exe PID 1932 wrote to memory of 556 1932 EXCEL.EXE rundll32.exe PID 1932 wrote to memory of 556 1932 EXCEL.EXE rundll32.exe PID 1932 wrote to memory of 556 1932 EXCEL.EXE rundll32.exe PID 1932 wrote to memory of 556 1932 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\document-1933373955.xls1⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\rundll32.exerundll32 ..\zfbfg.ere,DllRegisterServer2⤵
- Process spawned unexpected child process
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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memory/556-6-0x0000000000000000-mapping.dmp
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memory/556-7-0x00000000750C1000-0x00000000750C3000-memory.dmpFilesize
8KB
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memory/652-5-0x000007FEF5BC0000-0x000007FEF5E3A000-memory.dmpFilesize
2.5MB
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memory/1932-2-0x000000002F201000-0x000000002F204000-memory.dmpFilesize
12KB
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memory/1932-3-0x0000000070BA1000-0x0000000070BA3000-memory.dmpFilesize
8KB
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memory/1932-4-0x000000005FFF0000-0x0000000060000000-memory.dmpFilesize
64KB