Analysis
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max time kernel
148s -
max time network
188s -
platform
windows10-2004_x64 -
resource
win10v2004-20221111-en -
resource tags
arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system -
submitted
28-11-2022 09:14
Static task
static1
Behavioral task
behavioral1
Sample
iROBUX.exe
Resource
win7-20220901-en
Behavioral task
behavioral2
Sample
iROBUX.exe
Resource
win10v2004-20220901-en
Behavioral task
behavioral3
Sample
readme.__________txt.exe
Resource
win7-20221111-en
Behavioral task
behavioral4
Sample
readme.__________txt.exe
Resource
win10v2004-20221111-en
General
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Target
readme.__________txt.exe
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Size
544KB
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MD5
833d9ac9077ce6415450e05a3ec20f14
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SHA1
887ec9ff2fc9d4cc8223277d0348e7f7f51d0c88
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SHA256
744df077822f8801d301ac27ef90c2249e0f04049bfbaa8abebc47dc168951f0
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SHA512
ad5e758fdb547bf67249742113f05c3a7b93a53e14c2c0f06c368b3d657fd6cb525b41e96d7817e3654eb48f3c0d6aca59837ebd69b7f0749b211a9a92d14de2
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SSDEEP
6144:cu+GnD5bS/QTjhUqBfxrwEnuNcSsm7IoYGW0VvBXCAt6kihwE+VDpJYWmlwnx9ni:1QtqB5urTIoYWBQk1E+VF9mOx9nw00
Malware Config
Signatures
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NirSoft MailPassView 4 IoCs
Password recovery tool for various email clients
Processes:
resource yara_rule behavioral4/memory/832-134-0x0000000000000000-mapping.dmp MailPassView behavioral4/memory/832-137-0x0000000000400000-0x000000000041B000-memory.dmp MailPassView behavioral4/memory/832-140-0x0000000000400000-0x000000000041B000-memory.dmp MailPassView behavioral4/memory/832-142-0x0000000000400000-0x000000000041B000-memory.dmp MailPassView -
NirSoft WebBrowserPassView 5 IoCs
Password recovery tool for various web browsers
Processes:
resource yara_rule behavioral4/memory/888-135-0x0000000000000000-mapping.dmp WebBrowserPassView behavioral4/memory/888-136-0x0000000000400000-0x0000000000458000-memory.dmp WebBrowserPassView behavioral4/memory/888-141-0x0000000000400000-0x0000000000458000-memory.dmp WebBrowserPassView behavioral4/memory/888-143-0x0000000000400000-0x0000000000458000-memory.dmp WebBrowserPassView behavioral4/memory/888-145-0x0000000000400000-0x0000000000458000-memory.dmp WebBrowserPassView -
Nirsoft 9 IoCs
Processes:
resource yara_rule behavioral4/memory/832-134-0x0000000000000000-mapping.dmp Nirsoft behavioral4/memory/888-135-0x0000000000000000-mapping.dmp Nirsoft behavioral4/memory/832-137-0x0000000000400000-0x000000000041B000-memory.dmp Nirsoft behavioral4/memory/888-136-0x0000000000400000-0x0000000000458000-memory.dmp Nirsoft behavioral4/memory/832-140-0x0000000000400000-0x000000000041B000-memory.dmp Nirsoft behavioral4/memory/888-141-0x0000000000400000-0x0000000000458000-memory.dmp Nirsoft behavioral4/memory/832-142-0x0000000000400000-0x000000000041B000-memory.dmp Nirsoft behavioral4/memory/888-143-0x0000000000400000-0x0000000000458000-memory.dmp Nirsoft behavioral4/memory/888-145-0x0000000000400000-0x0000000000458000-memory.dmp Nirsoft -
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-1-5-21-4246620582-653642754-1174164128-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts vbc.exe -
Adds Run key to start application 2 TTPs 1 IoCs
Processes:
readme.__________txt.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Windows Update = "C:\\Users\\Admin\\AppData\\Roaming\\WindowsUpdate.exe" readme.__________txt.exe -
Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
Processes:
flow ioc 33 whatismyipaddress.com -
Suspicious use of SetThreadContext 2 IoCs
Processes:
readme.__________txt.exedescription pid process target process PID 3240 set thread context of 888 3240 readme.__________txt.exe vbc.exe PID 3240 set thread context of 832 3240 readme.__________txt.exe vbc.exe -
Suspicious behavior: EnumeratesProcesses 4 IoCs
Processes:
readme.__________txt.exevbc.exepid process 3240 readme.__________txt.exe 3240 readme.__________txt.exe 888 vbc.exe 888 vbc.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
readme.__________txt.exedescription pid process Token: SeDebugPrivilege 3240 readme.__________txt.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
readme.__________txt.exepid process 3240 readme.__________txt.exe -
Suspicious use of WriteProcessMemory 18 IoCs
Processes:
readme.__________txt.exedescription pid process target process PID 3240 wrote to memory of 888 3240 readme.__________txt.exe vbc.exe PID 3240 wrote to memory of 888 3240 readme.__________txt.exe vbc.exe PID 3240 wrote to memory of 888 3240 readme.__________txt.exe vbc.exe PID 3240 wrote to memory of 888 3240 readme.__________txt.exe vbc.exe PID 3240 wrote to memory of 888 3240 readme.__________txt.exe vbc.exe PID 3240 wrote to memory of 888 3240 readme.__________txt.exe vbc.exe PID 3240 wrote to memory of 888 3240 readme.__________txt.exe vbc.exe PID 3240 wrote to memory of 888 3240 readme.__________txt.exe vbc.exe PID 3240 wrote to memory of 832 3240 readme.__________txt.exe vbc.exe PID 3240 wrote to memory of 832 3240 readme.__________txt.exe vbc.exe PID 3240 wrote to memory of 832 3240 readme.__________txt.exe vbc.exe PID 3240 wrote to memory of 832 3240 readme.__________txt.exe vbc.exe PID 3240 wrote to memory of 832 3240 readme.__________txt.exe vbc.exe PID 3240 wrote to memory of 832 3240 readme.__________txt.exe vbc.exe PID 3240 wrote to memory of 832 3240 readme.__________txt.exe vbc.exe PID 3240 wrote to memory of 832 3240 readme.__________txt.exe vbc.exe PID 3240 wrote to memory of 888 3240 readme.__________txt.exe vbc.exe PID 3240 wrote to memory of 832 3240 readme.__________txt.exe vbc.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\readme.__________txt.exe"C:\Users\Admin\AppData\Local\Temp\readme.__________txt.exe"1⤵
- 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
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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"2⤵
- Accesses Microsoft Outlook accounts
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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"2⤵
- Suspicious behavior: EnumeratesProcesses
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\holdermail.txtFilesize
3KB
MD5f94dc819ca773f1e3cb27abbc9e7fa27
SHA19a7700efadc5ea09ab288544ef1e3cd876255086
SHA256a3377ade83786c2bdff5db19ff4dbfd796da4312402b5e77c4c63e38cc6eff92
SHA51272a2c10d7a53a7f9a319dab66d77ed65639e9aa885b551e0055fc7eaf6ef33bbf109205b42ae11555a0f292563914bc6edb63b310c6f9bda9564095f77ab9196
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memory/832-134-0x0000000000000000-mapping.dmp
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memory/832-137-0x0000000000400000-0x000000000041B000-memory.dmpFilesize
108KB
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memory/832-140-0x0000000000400000-0x000000000041B000-memory.dmpFilesize
108KB
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memory/832-142-0x0000000000400000-0x000000000041B000-memory.dmpFilesize
108KB
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memory/888-135-0x0000000000000000-mapping.dmp
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memory/888-136-0x0000000000400000-0x0000000000458000-memory.dmpFilesize
352KB
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memory/888-141-0x0000000000400000-0x0000000000458000-memory.dmpFilesize
352KB
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memory/888-143-0x0000000000400000-0x0000000000458000-memory.dmpFilesize
352KB
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memory/888-145-0x0000000000400000-0x0000000000458000-memory.dmpFilesize
352KB
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memory/3240-132-0x0000000074630000-0x0000000074BE1000-memory.dmpFilesize
5.7MB
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memory/3240-133-0x0000000074630000-0x0000000074BE1000-memory.dmpFilesize
5.7MB