Analysis
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max time kernel
149s -
max time network
151s -
platform
windows11-21h2_x64 -
resource
win11-20240426-en -
resource tags
arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system -
submitted
19-05-2024 21:52
Static task
static1
Behavioral task
behavioral1
Sample
34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe
Resource
win10v2004-20240426-en
General
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Target
34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe
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Size
4.1MB
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MD5
b9c066bfd5930f01490b888a93cda864
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SHA1
7ba8f12c7cf394d9822086afb05c2d8ca59bc4d6
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SHA256
34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020
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SHA512
874beda4f139173dcbfcdf5a0ad42da6452a493423b6c1d4a6d1851bcc01e75068db4e3598e15b4f3b15f40618171a4808cc42592e00e31f7ea2a979f3386fc2
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SSDEEP
98304:0X33DbWGkLHuFK+TwQmBC6reQ4TTNXYvI8KgvjrB0ra:0XPWAwQyCdJYw8Kgga
Malware Config
Signatures
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Glupteba payload 19 IoCs
resource yara_rule behavioral2/memory/3688-2-0x0000000004990000-0x000000000527B000-memory.dmp family_glupteba behavioral2/memory/3688-3-0x0000000000400000-0x0000000000D1C000-memory.dmp family_glupteba behavioral2/memory/3688-75-0x0000000004990000-0x000000000527B000-memory.dmp family_glupteba behavioral2/memory/3688-73-0x0000000000400000-0x0000000002733000-memory.dmp family_glupteba behavioral2/memory/3688-110-0x0000000000400000-0x0000000000D1C000-memory.dmp family_glupteba behavioral2/memory/4620-121-0x0000000000400000-0x0000000002733000-memory.dmp family_glupteba behavioral2/memory/4620-195-0x0000000000400000-0x0000000002733000-memory.dmp family_glupteba behavioral2/memory/1232-202-0x0000000000400000-0x0000000002733000-memory.dmp family_glupteba behavioral2/memory/1232-204-0x0000000000400000-0x0000000002733000-memory.dmp family_glupteba behavioral2/memory/1232-208-0x0000000000400000-0x0000000002733000-memory.dmp family_glupteba behavioral2/memory/1232-211-0x0000000000400000-0x0000000002733000-memory.dmp family_glupteba behavioral2/memory/1232-214-0x0000000000400000-0x0000000002733000-memory.dmp family_glupteba behavioral2/memory/1232-217-0x0000000000400000-0x0000000002733000-memory.dmp family_glupteba behavioral2/memory/1232-219-0x0000000000400000-0x0000000002733000-memory.dmp family_glupteba behavioral2/memory/1232-223-0x0000000000400000-0x0000000002733000-memory.dmp family_glupteba behavioral2/memory/1232-226-0x0000000000400000-0x0000000002733000-memory.dmp family_glupteba behavioral2/memory/1232-229-0x0000000000400000-0x0000000002733000-memory.dmp family_glupteba behavioral2/memory/1232-232-0x0000000000400000-0x0000000002733000-memory.dmp family_glupteba behavioral2/memory/1232-234-0x0000000000400000-0x0000000002733000-memory.dmp family_glupteba -
Modifies Windows Firewall 2 TTPs 1 IoCs
pid Process 1064 netsh.exe -
Executes dropped EXE 2 IoCs
pid Process 1232 csrss.exe 2880 injector.exe -
Adds Run key to start application 2 TTPs 2 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2994005945-4089876968-1367784197-1000\Software\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\Windows\\rss\\csrss.exe\"" 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe Set value (str) \REGISTRY\USER\S-1-5-21-2994005945-4089876968-1367784197-1000\Software\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\Windows\\rss\\csrss.exe\"" csrss.exe -
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
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Manipulates WinMonFS driver. 1 IoCs
Roottkits write to WinMonFS to hide directories/files from being detected.
description ioc Process File opened for modification \??\WinMonFS csrss.exe -
Drops file in System32 directory 7 IoCs
description ioc Process File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-Interactive powershell.exe File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-Interactive powershell.exe File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-Interactive powershell.exe File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-Interactive powershell.exe File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-Interactive powershell.exe File created C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-Interactive powershell.exe File created C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log powershell.exe -
Checks for VirtualBox DLLs, possible anti-VM trick 1 TTPs 1 IoCs
Certain files are specific to VirtualBox VMs and can be used to detect execution in a VM.
description ioc Process File opened (read-only) \??\VBoxMiniRdrDN 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe -
Drops file in Windows directory 2 IoCs
description ioc Process File opened for modification C:\Windows\rss 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe File created C:\Windows\rss\csrss.exe 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe -
pid Process 2572 powershell.exe 1588 powershell.exe 1452 powershell.exe 2952 powershell.exe 3352 powershell.exe 3124 powershell.exe 2264 powershell.exe -
Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 3988 schtasks.exe 3972 schtasks.exe -
Modifies data under HKEY_USERS 64 IoCs
description ioc Process Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-161 = "Central Daylight Time" 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-364 = "Middle East Daylight Time" 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-692 = "Tasmania Standard Time" 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed powershell.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CTLs powershell.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CTLs powershell.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-1661 = "Bahia Daylight Time" 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-261 = "GMT Daylight Time" 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-1871 = "Russia TZ 7 Daylight Time" 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CRLs powershell.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CRLs powershell.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust powershell.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\WinTrust\Trust Providers\Software Publishing powershell.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-2321 = "Sakhalin Daylight Time" 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CRLs powershell.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\Certificates powershell.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\Certificates powershell.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\CTLs powershell.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-2061 = "North Korea Daylight Time" 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-832 = "SA Eastern Standard Time" 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CTLs powershell.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\Certificates powershell.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CTLs powershell.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ powershell.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-151 = "Central America Daylight Time" 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust powershell.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CRLs powershell.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-448 = "Azerbaijan Daylight Time" 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-2431 = "Cuba Daylight Time" 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-2371 = "Easter Island Daylight Time" 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-242 = "Samoa Standard Time" 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1" powershell.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CRLs powershell.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA powershell.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-2492 = "Aus Central W. Standard Time" 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-291 = "Central European Daylight Time" 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-691 = "Tasmania Daylight Time" 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople powershell.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CRLs powershell.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-1831 = "Russia TZ 2 Daylight Time" 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-792 = "SA Western Standard Time" 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CTLs powershell.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA powershell.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CRLs powershell.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CTLs powershell.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed powershell.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-202 = "US Mountain Standard Time" 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CTLs powershell.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\Certificates powershell.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-2322 = "Sakhalin Standard Time" 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0" powershell.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-841 = "Argentina Daylight Time" 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-2771 = "Omsk Daylight Time" 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\Certificates powershell.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-92 = "Pacific SA Standard Time" 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust powershell.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-141 = "Canada Central Daylight Time" 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-251 = "Dateline Daylight Time" 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-981 = "Kamchatka Daylight Time" 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-342 = "Egypt Standard Time" 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CRLs powershell.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-282 = "Central Europe Standard Time" 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot powershell.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\Certificates powershell.exe -
Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 3352 powershell.exe 3352 powershell.exe 3688 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe 3688 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe 3124 powershell.exe 3124 powershell.exe 4620 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe 4620 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe 4620 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe 4620 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe 4620 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe 4620 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe 4620 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe 4620 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe 4620 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe 4620 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe 2264 powershell.exe 2264 powershell.exe 2572 powershell.exe 2572 powershell.exe 1588 powershell.exe 1588 powershell.exe 1452 powershell.exe 1452 powershell.exe 2952 powershell.exe 2952 powershell.exe 2880 injector.exe 2880 injector.exe 2880 injector.exe 2880 injector.exe 2880 injector.exe 2880 injector.exe 1232 csrss.exe 1232 csrss.exe 2880 injector.exe 2880 injector.exe 2880 injector.exe 2880 injector.exe 2880 injector.exe 2880 injector.exe 1232 csrss.exe 1232 csrss.exe 2880 injector.exe 2880 injector.exe 2880 injector.exe 2880 injector.exe 2880 injector.exe 2880 injector.exe 2880 injector.exe 2880 injector.exe 2880 injector.exe 2880 injector.exe 2880 injector.exe 2880 injector.exe 2880 injector.exe 2880 injector.exe 2880 injector.exe 2880 injector.exe 2880 injector.exe 2880 injector.exe 2880 injector.exe 2880 injector.exe 2880 injector.exe 2880 injector.exe -
Suspicious use of AdjustPrivilegeToken 10 IoCs
description pid Process Token: SeDebugPrivilege 3352 powershell.exe Token: SeDebugPrivilege 3688 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe Token: SeImpersonatePrivilege 3688 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe Token: SeDebugPrivilege 3124 powershell.exe Token: SeDebugPrivilege 2264 powershell.exe Token: SeDebugPrivilege 2572 powershell.exe Token: SeDebugPrivilege 1588 powershell.exe Token: SeDebugPrivilege 1452 powershell.exe Token: SeDebugPrivilege 2952 powershell.exe Token: SeSystemEnvironmentPrivilege 1232 csrss.exe -
Suspicious use of WriteProcessMemory 30 IoCs
description pid Process procid_target PID 3688 wrote to memory of 3352 3688 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe 82 PID 3688 wrote to memory of 3352 3688 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe 82 PID 3688 wrote to memory of 3352 3688 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe 82 PID 4620 wrote to memory of 3124 4620 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe 87 PID 4620 wrote to memory of 3124 4620 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe 87 PID 4620 wrote to memory of 3124 4620 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe 87 PID 4620 wrote to memory of 1408 4620 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe 89 PID 4620 wrote to memory of 1408 4620 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe 89 PID 1408 wrote to memory of 1064 1408 cmd.exe 91 PID 1408 wrote to memory of 1064 1408 cmd.exe 91 PID 4620 wrote to memory of 2264 4620 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe 92 PID 4620 wrote to memory of 2264 4620 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe 92 PID 4620 wrote to memory of 2264 4620 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe 92 PID 4620 wrote to memory of 2572 4620 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe 94 PID 4620 wrote to memory of 2572 4620 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe 94 PID 4620 wrote to memory of 2572 4620 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe 94 PID 4620 wrote to memory of 1232 4620 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe 96 PID 4620 wrote to memory of 1232 4620 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe 96 PID 4620 wrote to memory of 1232 4620 34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe 96 PID 1232 wrote to memory of 1588 1232 csrss.exe 97 PID 1232 wrote to memory of 1588 1232 csrss.exe 97 PID 1232 wrote to memory of 1588 1232 csrss.exe 97 PID 1232 wrote to memory of 1452 1232 csrss.exe 103 PID 1232 wrote to memory of 1452 1232 csrss.exe 103 PID 1232 wrote to memory of 1452 1232 csrss.exe 103 PID 1232 wrote to memory of 2952 1232 csrss.exe 105 PID 1232 wrote to memory of 2952 1232 csrss.exe 105 PID 1232 wrote to memory of 2952 1232 csrss.exe 105 PID 1232 wrote to memory of 2880 1232 csrss.exe 107 PID 1232 wrote to memory of 2880 1232 csrss.exe 107 -
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:\Users\Admin\AppData\Local\Temp\34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe"C:\Users\Admin\AppData\Local\Temp\34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe"1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3688 -
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exepowershell -nologo -noprofile2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3352
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C:\Users\Admin\AppData\Local\Temp\34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe"C:\Users\Admin\AppData\Local\Temp\34877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020.exe"2⤵
- Adds Run key to start application
- Checks for VirtualBox DLLs, possible anti-VM trick
- Drops file in Windows directory
- Modifies data under HKEY_USERS
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4620 -
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exepowershell -nologo -noprofile3⤵
- Drops file in System32 directory
- Command and Scripting Interpreter: PowerShell
- Modifies data under HKEY_USERS
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3124
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C:\Windows\system32\cmd.exeC:\Windows\Sysnative\cmd.exe /C "netsh advfirewall firewall add rule name="csrss" dir=in action=allow program="C:\Windows\rss\csrss.exe" enable=yes"3⤵
- Suspicious use of WriteProcessMemory
PID:1408 -
C:\Windows\system32\netsh.exenetsh advfirewall firewall add rule name="csrss" dir=in action=allow program="C:\Windows\rss\csrss.exe" enable=yes4⤵
- Modifies Windows Firewall
PID:1064
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C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exepowershell -nologo -noprofile3⤵
- Drops file in System32 directory
- Command and Scripting Interpreter: PowerShell
- Modifies data under HKEY_USERS
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2264
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C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exepowershell -nologo -noprofile3⤵
- Drops file in System32 directory
- Command and Scripting Interpreter: PowerShell
- Modifies data under HKEY_USERS
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2572
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C:\Windows\rss\csrss.exeC:\Windows\rss\csrss.exe3⤵
- Executes dropped EXE
- Adds Run key to start application
- Manipulates WinMonFS driver.
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1232 -
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exepowershell -nologo -noprofile4⤵
- Drops file in System32 directory
- Command and Scripting Interpreter: PowerShell
- Modifies data under HKEY_USERS
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1588
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C:\Windows\SYSTEM32\schtasks.exeschtasks /CREATE /SC ONLOGON /RL HIGHEST /TR "C:\Windows\rss\csrss.exe" /TN csrss /F4⤵
- Creates scheduled task(s)
PID:3988
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C:\Windows\SYSTEM32\schtasks.exeschtasks /delete /tn ScheduledUpdate /f4⤵PID:4536
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C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exepowershell -nologo -noprofile4⤵
- Drops file in System32 directory
- Command and Scripting Interpreter: PowerShell
- Modifies data under HKEY_USERS
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1452
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C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exepowershell -nologo -noprofile4⤵
- Drops file in System32 directory
- Command and Scripting Interpreter: PowerShell
- Modifies data under HKEY_USERS
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2952
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C:\Users\Admin\AppData\Local\Temp\csrss\injector\injector.exeC:\Users\Admin\AppData\Local\Temp\csrss\injector\injector.exe taskmgr.exe C:\Users\Admin\AppData\Local\Temp\csrss\injector\NtQuerySystemInformationHook.dll4⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
PID:2880
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C:\Windows\SYSTEM32\schtasks.exeschtasks /CREATE /SC ONLOGON /RL HIGHEST /TR "C:\Windows\rss\csrss.exe" /TN csrss /F4⤵
- Creates scheduled task(s)
PID:3972
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Network
MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Create or Modify System Process
1Windows Service
1Scheduled Task/Job
1Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Create or Modify System Process
1Windows Service
1Scheduled Task/Job
1Replay Monitor
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Downloads
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Filesize
60B
MD5d17fe0a3f47be24a6453e9ef58c94641
SHA16ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA25696ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA5125b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
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Filesize
281KB
MD5d98e33b66343e7c96158444127a117f6
SHA1bb716c5509a2bf345c6c1152f6e3e1452d39d50d
SHA2565de4e2b07a26102fe527606ce5da1d5a4b938967c9d380a3c5fe86e2e34aaaf1
SHA512705275e4a1ba8205eb799a8cf1737bc8ba686925e52c9198a6060a7abeee65552a85b814ac494a4b975d496a63be285f19a6265550585f2fc85824c42d7efab5
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C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log
Filesize2KB
MD5d0c46cad6c0778401e21910bd6b56b70
SHA17be418951ea96326aca445b8dfe449b2bfa0dca6
SHA2569600b3fdf0565ccb49e21656aa4b24d7c18f776bfd04d9ee984b134707550f02
SHA512057531b468f7fbbb2175a696a8aab274dec0d17d9f71df309edcff35e064f3378050066a3df47ccd03048fac461594ec75e3d4fe64f9dd79949d129f51e02949
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C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-Interactive
Filesize19KB
MD5d28c89dbe83c691bc0c6dbe6b1dd6064
SHA16e41c258e081aa21fee6c2d0ee14e561cf81e4fb
SHA2566f6e85c4a7348c5c4fda6c461e57867ecd7e2946f78c755c470dd43d89d8cea6
SHA5126d32a1712dfc277f1670f2bc99e8bd7d3a1f593b1bcf5d33c5b1fd5650201e75dab9fa353b1a8a8377c7e18b187c129e8837c8861bd889e8537a807454cf9cf9
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C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-Interactive
Filesize19KB
MD56a698da96d0ab0c226b4b5cc23fe1cd4
SHA19821867ac76da76f7a9b4f77c9cab4a9d1c365e6
SHA256b29339f7330d372707d94fc19e379515943d6ffbb4168118967ee9ac4c5984da
SHA512af43cf1149ce435112027e4d2af5b86ae1a7ebf04c64305887eeb4ce47cf9c070729f61e490911403233db38e786747dfffcf6d99a01b7cb923de4c96727e81c
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C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-Interactive
Filesize19KB
MD56c23b889eaba7f85fd0c121bd90365cc
SHA199122f6cb885026d699f44bf8aa9a09f1241aedd
SHA256e5b4eb2d915434e98f25785158eb7ef226773919eabc9f5f06c0d7aebf35358e
SHA51298384e18f0aed536477366557360e7ff0d5a18de3e99fb0d5215fb60e9895c3b37fb26b106338bb27fe40af32b0071a9505805776b4030109c819ecd2ab9f467
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C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-Interactive
Filesize19KB
MD50587802ea3c8f037f7e4fcf0c72c4c00
SHA1db19157d4a9c68e834149d17ca191c22561085c5
SHA256b3f15a0bf44e34e09ea419ffa0c997a3358d98e88ffc015a1cd7fcd80accde03
SHA51227ea56f1efabf892a34408a7a28456363827ae081ea119dc7b378d37b0e51390f352ee969366db208c165b2faaf1bcd1e378bc3f69b571d94fb4384d91bfd789
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C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-Interactive
Filesize19KB
MD54cdeda8ec3eab131efbafd12426b0dcc
SHA15309594694288cfcf389d3c4d196e22604b154cc
SHA2560bdc958d7947491ea2236697cb4cb5b9457b90f2f3c4b0a015321035ccb4d3b9
SHA512ef82a68a16f98d09fc0ad75b2e61bd4f15ee9c7f1de615052cc28c39d9c07eae68d0faab459c03a595467d21168a8600bb01dfdb990a6e279108101dac0f00a1
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Filesize
4.1MB
MD5b9c066bfd5930f01490b888a93cda864
SHA17ba8f12c7cf394d9822086afb05c2d8ca59bc4d6
SHA25634877ab10419ca3f26a8fb29e8e7c0992ac56ce72bfb91980924c582b32bb020
SHA512874beda4f139173dcbfcdf5a0ad42da6452a493423b6c1d4a6d1851bcc01e75068db4e3598e15b4f3b15f40618171a4808cc42592e00e31f7ea2a979f3386fc2