Analysis
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max time kernel
150s -
max time network
78s -
platform
windows7_x64 -
resource
win7v20210408 -
submitted
05-05-2021 05:35
Behavioral task
behavioral1
Sample
Documents_52436149_1332453001.xls
Resource
win7v20210408
windows7_x64
0 signatures
0 seconds
General
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Target
Documents_52436149_1332453001.xls
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Size
274KB
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MD5
96ac4b6f8184f21eadac4e4f719447de
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SHA1
e67bb5d1240f2572dac3c4bf673cdfa13a1851c1
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SHA256
507a6d57570a5774ce656a1b82535a4992e2320c6a760a5e957665263bf102cd
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SHA512
a90031551504452a3a1a8348a7bb49562b53bbb0dfce86b188b7436756232cf3aa69741388ae0b1101fb03c4a66b22ca2d721567bb7de3b3b8a2da491fddc2ca
Score
10/10
Malware Config
Extracted
Language
xlm4.0
Source
URLs
xlm40.dropper
https://parkisolutions.com/nerugin.dll
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 548 1684 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 Set value (str) \REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes" EXCEL.EXE Set value (str) \REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\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-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1" EXCEL.EXE Key created \REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\Toolbar EXCEL.EXE Key created \REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt EXCEL.EXE Key created \REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote EXCEL.EXE Set value (str) \REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\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-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55" EXCEL.EXE Key created \REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel EXCEL.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
Processes:
EXCEL.EXEpid process 1684 EXCEL.EXE -
Suspicious use of SetWindowsHookEx 12 IoCs
Processes:
EXCEL.EXEpid process 1684 EXCEL.EXE 1684 EXCEL.EXE 1684 EXCEL.EXE 1684 EXCEL.EXE 1684 EXCEL.EXE 1684 EXCEL.EXE 1684 EXCEL.EXE 1684 EXCEL.EXE 1684 EXCEL.EXE 1684 EXCEL.EXE 1684 EXCEL.EXE 1684 EXCEL.EXE -
Suspicious use of WriteProcessMemory 7 IoCs
Processes:
EXCEL.EXEdescription pid process target process PID 1684 wrote to memory of 548 1684 EXCEL.EXE rundll32.exe PID 1684 wrote to memory of 548 1684 EXCEL.EXE rundll32.exe PID 1684 wrote to memory of 548 1684 EXCEL.EXE rundll32.exe PID 1684 wrote to memory of 548 1684 EXCEL.EXE rundll32.exe PID 1684 wrote to memory of 548 1684 EXCEL.EXE rundll32.exe PID 1684 wrote to memory of 548 1684 EXCEL.EXE rundll32.exe PID 1684 wrote to memory of 548 1684 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\Documents_52436149_1332453001.xls1⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1684 -
C:\Windows\SysWOW64\rundll32.exerundll32 ..\iofjgjfldnd.hde,StartW2⤵
- Process spawned unexpected child process
PID:548
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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memory/548-63-0x0000000000000000-mapping.dmp
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memory/548-64-0x0000000075B31000-0x0000000075B33000-memory.dmpFilesize
8KB
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memory/1684-60-0x000000002F621000-0x000000002F624000-memory.dmpFilesize
12KB
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memory/1684-61-0x0000000071AE1000-0x0000000071AE3000-memory.dmpFilesize
8KB
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memory/1684-62-0x000000005FFF0000-0x0000000060000000-memory.dmpFilesize
64KB