Analysis
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max time kernel
58s -
max time network
44s -
platform
windows7_x64 -
resource
win7v20201028 -
submitted
24-02-2021 19:35
Behavioral task
behavioral1
Sample
document-1610559818.xls
Resource
win7v20201028
windows7_x64
0 signatures
0 seconds
Behavioral task
behavioral2
Sample
document-1610559818.xls
Resource
win10v20201028
windows10_x64
0 signatures
0 seconds
General
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Target
document-1610559818.xls
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Size
90KB
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MD5
166d0e4e50303630b148a09eed5c3d46
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SHA1
ad2c322456653198f0474a6f32f4c6e0e6e23dc5
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SHA256
c5a856a5c3981d8fbb0aa1043c82b790f803fd0dcc8dff18f45499211707a531
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SHA512
41c2bfd37226e721107ae8090b785255f6be628bc84cbbcc708e37ab973f4333a7fab791209589be4afd01626569b0f043a6d7eb559352cb4e0c4a41e90c3939
Score
10/10
Malware Config
Extracted
Language
xlm4.0
Source
URLs
xlm40.dropper
http://31.214.157.206/22.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 552 1812 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-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\Toolbar EXCEL.EXE Set value (str) \REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes" EXCEL.EXE Key created \REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote EXCEL.EXE Set value (str) \REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\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-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel EXCEL.EXE Set value (int) \REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1" EXCEL.EXE Key created \REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt EXCEL.EXE Set value (int) \REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55" EXCEL.EXE Set value (str) \REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\EXCEL.EXE/3000" EXCEL.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
Processes:
EXCEL.EXEpid process 1812 EXCEL.EXE -
Suspicious use of SetWindowsHookEx 3 IoCs
Processes:
EXCEL.EXEpid process 1812 EXCEL.EXE 1812 EXCEL.EXE 1812 EXCEL.EXE -
Suspicious use of WriteProcessMemory 7 IoCs
Processes:
EXCEL.EXEdescription pid process target process PID 1812 wrote to memory of 552 1812 EXCEL.EXE rundll32.exe PID 1812 wrote to memory of 552 1812 EXCEL.EXE rundll32.exe PID 1812 wrote to memory of 552 1812 EXCEL.EXE rundll32.exe PID 1812 wrote to memory of 552 1812 EXCEL.EXE rundll32.exe PID 1812 wrote to memory of 552 1812 EXCEL.EXE rundll32.exe PID 1812 wrote to memory of 552 1812 EXCEL.EXE rundll32.exe PID 1812 wrote to memory of 552 1812 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-1610559818.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 ..\rieuro.vnt,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/472-5-0x000007FEF60A0000-0x000007FEF631A000-memory.dmpFilesize
2.5MB
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memory/552-6-0x0000000000000000-mapping.dmp
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memory/552-7-0x0000000076241000-0x0000000076243000-memory.dmpFilesize
8KB
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memory/1812-2-0x000000002FA91000-0x000000002FA94000-memory.dmpFilesize
12KB
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memory/1812-3-0x0000000071241000-0x0000000071243000-memory.dmpFilesize
8KB
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memory/1812-4-0x000000005FFF0000-0x0000000060000000-memory.dmpFilesize
64KB