Analysis
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max time kernel
151s -
max time network
157s -
platform
windows10-2004_x64 -
resource
win10v2004-20220901-en -
resource tags
arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system -
submitted
23-11-2022 13:42
Static task
static1
Behavioral task
behavioral1
Sample
8cc2f53bff5b28bd19b6216c2f025451851e35bf84aa00c16d0602af7f954a1e.exe
Resource
win7-20220901-en
Behavioral task
behavioral2
Sample
8cc2f53bff5b28bd19b6216c2f025451851e35bf84aa00c16d0602af7f954a1e.exe
Resource
win10v2004-20220901-en
General
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Target
8cc2f53bff5b28bd19b6216c2f025451851e35bf84aa00c16d0602af7f954a1e.exe
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Size
712KB
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MD5
80fa4ff9b4ce3ab432e6b120ab5800d6
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SHA1
dcbd6cfdf7d81089392ab74d87c87986bcaf1249
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SHA256
8cc2f53bff5b28bd19b6216c2f025451851e35bf84aa00c16d0602af7f954a1e
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SHA512
fcb515603fb9e102028e2bf3b15358874d89e8a9b4603197aba91a24852cb2f7c15dfe71ab5cfaf400e7d654bd89c7e927db063f52d8b55247a2cf67b7ffed38
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SSDEEP
12288:CQtqB5urTIoYWBQk1E+VF9mOx99PP7r9r/+ppppppppppppppppppppppppppppd:CQtqBorTlYWBhE+V3mOVP1q
Malware Config
Signatures
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NirSoft MailPassView 6 IoCs
Password recovery tool for various email clients
Processes:
resource yara_rule C:\Users\Admin\AppData\Roaming\Windows Update.exe MailPassView C:\Users\Admin\AppData\Roaming\Windows Update.exe MailPassView behavioral2/memory/1868-139-0x0000000000000000-mapping.dmp MailPassView behavioral2/memory/1868-140-0x0000000000400000-0x000000000041B000-memory.dmp MailPassView behavioral2/memory/1868-142-0x0000000000400000-0x000000000041B000-memory.dmp MailPassView behavioral2/memory/1868-143-0x0000000000400000-0x000000000041B000-memory.dmp MailPassView -
NirSoft WebBrowserPassView 6 IoCs
Password recovery tool for various web browsers
Processes:
resource yara_rule C:\Users\Admin\AppData\Roaming\Windows Update.exe WebBrowserPassView C:\Users\Admin\AppData\Roaming\Windows Update.exe WebBrowserPassView behavioral2/memory/2008-145-0x0000000000000000-mapping.dmp WebBrowserPassView behavioral2/memory/2008-146-0x0000000000400000-0x0000000000458000-memory.dmp WebBrowserPassView behavioral2/memory/2008-148-0x0000000000400000-0x0000000000458000-memory.dmp WebBrowserPassView behavioral2/memory/2008-150-0x0000000000400000-0x0000000000458000-memory.dmp WebBrowserPassView -
Nirsoft 10 IoCs
Processes:
resource yara_rule C:\Users\Admin\AppData\Roaming\Windows Update.exe Nirsoft C:\Users\Admin\AppData\Roaming\Windows Update.exe Nirsoft behavioral2/memory/1868-139-0x0000000000000000-mapping.dmp Nirsoft behavioral2/memory/1868-140-0x0000000000400000-0x000000000041B000-memory.dmp Nirsoft behavioral2/memory/1868-142-0x0000000000400000-0x000000000041B000-memory.dmp Nirsoft behavioral2/memory/1868-143-0x0000000000400000-0x000000000041B000-memory.dmp Nirsoft behavioral2/memory/2008-145-0x0000000000000000-mapping.dmp Nirsoft behavioral2/memory/2008-146-0x0000000000400000-0x0000000000458000-memory.dmp Nirsoft behavioral2/memory/2008-148-0x0000000000400000-0x0000000000458000-memory.dmp Nirsoft behavioral2/memory/2008-150-0x0000000000400000-0x0000000000458000-memory.dmp Nirsoft -
Executes dropped EXE 1 IoCs
Processes:
Windows Update.exepid process 4332 Windows Update.exe -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
8cc2f53bff5b28bd19b6216c2f025451851e35bf84aa00c16d0602af7f954a1e.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation 8cc2f53bff5b28bd19b6216c2f025451851e35bf84aa00c16d0602af7f954a1e.exe -
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Uses the VBS compiler for execution 1 TTPs
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Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
Processes:
vbc.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts vbc.exe -
Adds Run key to start application 2 TTPs 1 IoCs
Processes:
Windows Update.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Windows Update = "C:\\Users\\Admin\\AppData\\Roaming\\WindowsUpdate.exe" Windows Update.exe -
Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
Processes:
flow ioc 18 whatismyipaddress.com 20 whatismyipaddress.com -
Suspicious use of SetThreadContext 2 IoCs
Processes:
Windows Update.exedescription pid process target process PID 4332 set thread context of 1868 4332 Windows Update.exe vbc.exe PID 4332 set thread context of 2008 4332 Windows Update.exe vbc.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Suspicious behavior: EnumeratesProcesses 64 IoCs
Processes:
Windows Update.exepid process 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe 4332 Windows Update.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
Windows Update.exedescription pid process Token: SeDebugPrivilege 4332 Windows Update.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
Windows Update.exepid process 4332 Windows Update.exe -
Suspicious use of WriteProcessMemory 21 IoCs
Processes:
8cc2f53bff5b28bd19b6216c2f025451851e35bf84aa00c16d0602af7f954a1e.exeWindows Update.exedescription pid process target process PID 4396 wrote to memory of 4332 4396 8cc2f53bff5b28bd19b6216c2f025451851e35bf84aa00c16d0602af7f954a1e.exe Windows Update.exe PID 4396 wrote to memory of 4332 4396 8cc2f53bff5b28bd19b6216c2f025451851e35bf84aa00c16d0602af7f954a1e.exe Windows Update.exe PID 4396 wrote to memory of 4332 4396 8cc2f53bff5b28bd19b6216c2f025451851e35bf84aa00c16d0602af7f954a1e.exe Windows Update.exe PID 4332 wrote to memory of 1868 4332 Windows Update.exe vbc.exe PID 4332 wrote to memory of 1868 4332 Windows Update.exe vbc.exe PID 4332 wrote to memory of 1868 4332 Windows Update.exe vbc.exe PID 4332 wrote to memory of 1868 4332 Windows Update.exe vbc.exe PID 4332 wrote to memory of 1868 4332 Windows Update.exe vbc.exe PID 4332 wrote to memory of 1868 4332 Windows Update.exe vbc.exe PID 4332 wrote to memory of 1868 4332 Windows Update.exe vbc.exe PID 4332 wrote to memory of 1868 4332 Windows Update.exe vbc.exe PID 4332 wrote to memory of 1868 4332 Windows Update.exe vbc.exe PID 4332 wrote to memory of 2008 4332 Windows Update.exe vbc.exe PID 4332 wrote to memory of 2008 4332 Windows Update.exe vbc.exe PID 4332 wrote to memory of 2008 4332 Windows Update.exe vbc.exe PID 4332 wrote to memory of 2008 4332 Windows Update.exe vbc.exe PID 4332 wrote to memory of 2008 4332 Windows Update.exe vbc.exe PID 4332 wrote to memory of 2008 4332 Windows Update.exe vbc.exe PID 4332 wrote to memory of 2008 4332 Windows Update.exe vbc.exe PID 4332 wrote to memory of 2008 4332 Windows Update.exe vbc.exe PID 4332 wrote to memory of 2008 4332 Windows Update.exe vbc.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\8cc2f53bff5b28bd19b6216c2f025451851e35bf84aa00c16d0602af7f954a1e.exe"C:\Users\Admin\AppData\Local\Temp\8cc2f53bff5b28bd19b6216c2f025451851e35bf84aa00c16d0602af7f954a1e.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4396 -
C:\Users\Admin\AppData\Roaming\Windows Update.exe"C:\Users\Admin\AppData\Roaming\Windows Update.exe"2⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4332 -
C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exeC:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe /stext "C:\Users\Admin\AppData\Local\Temp\holdermail.txt"3⤵
- Accesses Microsoft Outlook accounts
PID:1868 -
C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exeC:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe /stext "C:\Users\Admin\AppData\Local\Temp\holderwb.txt"3⤵PID:2008
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
102B
MD5981145e68418e44ae61afa061f1f60e9
SHA171353298386753ff2a2ac60105c1b586435e54e1
SHA256477c7f89af00be13cd61f22740eec7f4a141dc237e325cc0deb2e61aeefca400
SHA5126fa1e45b545b88ff74f8bb8723d8f49f2ee257e7b6b43a52a0e676e276c6b8e4fb203ce8498a429ca75fd39ed6eed6bfca7994242f1330807606f293664c2c2a
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Filesize
3KB
MD5f94dc819ca773f1e3cb27abbc9e7fa27
SHA19a7700efadc5ea09ab288544ef1e3cd876255086
SHA256a3377ade83786c2bdff5db19ff4dbfd796da4312402b5e77c4c63e38cc6eff92
SHA51272a2c10d7a53a7f9a319dab66d77ed65639e9aa885b551e0055fc7eaf6ef33bbf109205b42ae11555a0f292563914bc6edb63b310c6f9bda9564095f77ab9196
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Filesize
712KB
MD580fa4ff9b4ce3ab432e6b120ab5800d6
SHA1dcbd6cfdf7d81089392ab74d87c87986bcaf1249
SHA2568cc2f53bff5b28bd19b6216c2f025451851e35bf84aa00c16d0602af7f954a1e
SHA512fcb515603fb9e102028e2bf3b15358874d89e8a9b4603197aba91a24852cb2f7c15dfe71ab5cfaf400e7d654bd89c7e927db063f52d8b55247a2cf67b7ffed38
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Filesize
712KB
MD580fa4ff9b4ce3ab432e6b120ab5800d6
SHA1dcbd6cfdf7d81089392ab74d87c87986bcaf1249
SHA2568cc2f53bff5b28bd19b6216c2f025451851e35bf84aa00c16d0602af7f954a1e
SHA512fcb515603fb9e102028e2bf3b15358874d89e8a9b4603197aba91a24852cb2f7c15dfe71ab5cfaf400e7d654bd89c7e927db063f52d8b55247a2cf67b7ffed38