Analysis
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max time kernel
70s -
max time network
18s -
platform
windows7_x64 -
resource
win7v20201028 -
submitted
15-03-2021 02:18
Static task
static1
Behavioral task
behavioral1
Sample
Hoa don tien no/Noi dung chi tiet hoa don tien no gui chi Thuong . Cong hoa xa hoi chu nghia Viet Na.exe
Resource
win7v20201028
Behavioral task
behavioral2
Sample
Hoa don tien no/Noi dung chi tiet hoa don tien no gui chi Thuong . Cong hoa xa hoi chu nghia Viet Na.exe
Resource
win10v20201028
Behavioral task
behavioral3
Sample
Hoa don tien no/wwlib.dll
Resource
win7v20201028
General
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Target
Hoa don tien no/wwlib.dll
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Size
114KB
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MD5
c6423f8911ed975ffa735eb14573e9f7
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SHA1
2620e17b03d829a740960a2c4d907b2f7ea2219c
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SHA256
fa259f953cd319da9bdcd84d40b2a89869bd307e8f9206b5653e78666f08f5b8
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SHA512
d42f129421ed8678c2fa5cd152e1523747754cc07dcf60849e00e481e5ad601dfc80cd9624d5254235d077359f546395a2eec80f825da0733ec6e302789422c5
Malware Config
Signatures
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Blocklisted process makes network request 2 IoCs
Processes:
rundll32.exeflow pid process 4 1828 rundll32.exe 8 1828 rundll32.exe -
Processes:
resource yara_rule C:\Users\Admin\AppData\Local\Temp\Office.doc office_xlm_macros -
Drops file in Windows directory 1 IoCs
Processes:
WINWORD.EXEdescription ioc process File opened for modification C:\Windows\Debug\WIA\wiatrace.log WINWORD.EXE -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Office loads VBA resources, possible macro or embedded object present
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Processes:
WINWORD.EXEdescription ioc process Key created \REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt WINWORD.EXE Key created \REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote WINWORD.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" WINWORD.EXE Key created \REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\Toolbar WINWORD.EXE Set value (str) \REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes" WINWORD.EXE Key created \REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel WINWORD.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" WINWORD.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" WINWORD.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" WINWORD.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
Processes:
WINWORD.EXEpid process 1068 WINWORD.EXE -
Suspicious use of SetWindowsHookEx 2 IoCs
Processes:
WINWORD.EXEpid process 1068 WINWORD.EXE 1068 WINWORD.EXE -
Suspicious use of WriteProcessMemory 11 IoCs
Processes:
rundll32.exerundll32.exedescription pid process target process PID 644 wrote to memory of 1828 644 rundll32.exe rundll32.exe PID 644 wrote to memory of 1828 644 rundll32.exe rundll32.exe PID 644 wrote to memory of 1828 644 rundll32.exe rundll32.exe PID 644 wrote to memory of 1828 644 rundll32.exe rundll32.exe PID 644 wrote to memory of 1828 644 rundll32.exe rundll32.exe PID 644 wrote to memory of 1828 644 rundll32.exe rundll32.exe PID 644 wrote to memory of 1828 644 rundll32.exe rundll32.exe PID 1828 wrote to memory of 1068 1828 rundll32.exe WINWORD.EXE PID 1828 wrote to memory of 1068 1828 rundll32.exe WINWORD.EXE PID 1828 wrote to memory of 1068 1828 rundll32.exe WINWORD.EXE PID 1828 wrote to memory of 1068 1828 rundll32.exe WINWORD.EXE
Processes
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C:\Windows\system32\rundll32.exerundll32.exe "C:\Users\Admin\AppData\Local\Temp\Hoa don tien no\wwlib.dll",#11⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\rundll32.exerundll32.exe "C:\Users\Admin\AppData\Local\Temp\Hoa don tien no\wwlib.dll",#12⤵
- Blocklisted process makes network request
- Suspicious use of WriteProcessMemory
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C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE"C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\Office.doc"3⤵
- Drops file in Windows directory
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Temp\Office.docMD5
76d0b64858e5772a13d44a4268bb1217
SHA139d0daedfb2af65dcbe88fa171d6100843c98c09
SHA25635444de65a359a2206eaf4dbf394582543088b196e1e88a1029bf7531125cc5b
SHA512bdae16ce85117eed1c25ce0a676b67a1754e8d2223d6f04216d6ec1aad77c98d9e30a9fa338fe051395e33e6d7043ef7e5572d03e9db64885e0efa99d279e20a
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memory/1068-4-0x0000000000000000-mapping.dmp
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memory/1068-5-0x0000000072881000-0x0000000072884000-memory.dmpFilesize
12KB
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memory/1068-6-0x0000000070301000-0x0000000070303000-memory.dmpFilesize
8KB
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memory/1068-9-0x000000005FFF0000-0x0000000060000000-memory.dmpFilesize
64KB
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memory/1520-11-0x000007FEF6350000-0x000007FEF65CA000-memory.dmpFilesize
2.5MB
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memory/1828-2-0x0000000000000000-mapping.dmp
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memory/1828-3-0x00000000765E1000-0x00000000765E3000-memory.dmpFilesize
8KB
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memory/1828-8-0x00000000001B0000-0x00000000001B1000-memory.dmpFilesize
4KB
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memory/1828-7-0x00000000001A0000-0x00000000001A1000-memory.dmpFilesize
4KB
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memory/1828-12-0x00000000026A0000-0x00000000030A0000-memory.dmpFilesize
10.0MB