Analysis
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max time kernel
144s -
max time network
148s -
platform
windows7_x64 -
resource
win7v20201028 -
submitted
24-02-2021 06:30
Behavioral task
behavioral1
Sample
Attach_589256204_214472970.xls
Resource
win7v20201028
windows7_x64
0 signatures
0 seconds
General
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Target
Attach_589256204_214472970.xls
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Size
141KB
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MD5
fa7354227422a339d34d662839e0aee2
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SHA1
09c5bb8db08c53f00745262ba414fa093d6dd7f9
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SHA256
d70803dc31e45825416b5391969ab9042baa17c01e080382a4340cef54090c84
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SHA512
48db1f5701e12f2e2cebc6aa852673d1a93598ed77c93dc6251270824fb11ac958315c8f3443edf2329c096b0149cdce48d94c30556113d9606df8856f5e8c43
Score
10/10
Malware Config
Extracted
Language
xlm4.0
Source
URLs
xlm40.dropper
http://bearcatpumps.com.cn/css/tolkio.php
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 1080 1616 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 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 (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 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\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 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 -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
Processes:
EXCEL.EXEpid process 1616 EXCEL.EXE -
Suspicious use of SetWindowsHookEx 3 IoCs
Processes:
EXCEL.EXEpid process 1616 EXCEL.EXE 1616 EXCEL.EXE 1616 EXCEL.EXE -
Suspicious use of WriteProcessMemory 7 IoCs
Processes:
EXCEL.EXEdescription pid process target process PID 1616 wrote to memory of 1080 1616 EXCEL.EXE rundll32.exe PID 1616 wrote to memory of 1080 1616 EXCEL.EXE rundll32.exe PID 1616 wrote to memory of 1080 1616 EXCEL.EXE rundll32.exe PID 1616 wrote to memory of 1080 1616 EXCEL.EXE rundll32.exe PID 1616 wrote to memory of 1080 1616 EXCEL.EXE rundll32.exe PID 1616 wrote to memory of 1080 1616 EXCEL.EXE rundll32.exe PID 1616 wrote to memory of 1080 1616 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\Attach_589256204_214472970.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 ..\TDCS.OKDFR,DllRegisterServer12⤵
- 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/1080-6-0x0000000000000000-mapping.dmp
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memory/1080-7-0x00000000765A1000-0x00000000765A3000-memory.dmpFilesize
8KB
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memory/1192-5-0x000007FEF7BD0000-0x000007FEF7E4A000-memory.dmpFilesize
2.5MB
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memory/1616-2-0x000000002F1A1000-0x000000002F1A4000-memory.dmpFilesize
12KB
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memory/1616-3-0x0000000071A81000-0x0000000071A83000-memory.dmpFilesize
8KB
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memory/1616-4-0x000000005FFF0000-0x0000000060000000-memory.dmpFilesize
64KB