Analysis
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max time kernel
38s -
max time network
140s -
platform
windows10-2004_x64 -
resource
win10v2004-20240412-en -
resource tags
arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system -
submitted
20-04-2024 21:33
Static task
static1
Behavioral task
behavioral1
Sample
b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe
Resource
win10v2004-20240412-en
General
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Target
b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe
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Size
4.2MB
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MD5
5baacf7daa5badcc4797e877e7f0d261
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SHA1
e7129048ed96fc80442039a227b62b6b80a5d2c6
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SHA256
b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81
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SHA512
251ed23f92471c7bda58bdd7442cee003fcdbc6773f6c951194e0df4f4ecfcef4819c0d0c036e7c0c0bfc2cedcb7517ecbe7b106aa5a5ca42b2c35edd370c332
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SSDEEP
98304:6B6TE4JDSTIitXqfSjBwF+v4rSSNjcdSqGUwT7RQU7ON:HTFmTI8qKjKFA4r+dAh7RQUA
Malware Config
Signatures
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Glupteba payload 8 IoCs
Processes:
resource yara_rule behavioral1/memory/3440-2-0x0000000004110000-0x00000000049FB000-memory.dmp family_glupteba behavioral1/memory/3440-3-0x0000000000400000-0x0000000001DF9000-memory.dmp family_glupteba behavioral1/memory/1392-57-0x0000000004010000-0x00000000048FB000-memory.dmp family_glupteba behavioral1/memory/1392-58-0x0000000000400000-0x0000000001DF9000-memory.dmp family_glupteba behavioral1/memory/3440-71-0x0000000000400000-0x0000000001DF9000-memory.dmp family_glupteba behavioral1/memory/1392-135-0x0000000000400000-0x0000000001DF9000-memory.dmp family_glupteba behavioral1/memory/1392-155-0x0000000000400000-0x0000000001DF9000-memory.dmp family_glupteba behavioral1/memory/2012-251-0x0000000000400000-0x0000000001DF9000-memory.dmp family_glupteba -
Modifies Windows Firewall 2 TTPs 1 IoCs
Processes:
netsh.exepid process 1104 netsh.exe -
Executes dropped EXE 2 IoCs
Processes:
csrss.exeinjector.exepid process 2012 csrss.exe 4364 injector.exe -
Adds Run key to start application 2 TTPs 2 IoCs
Processes:
b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.execsrss.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-2288054676-1871194608-3559553667-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\Windows\\rss\\csrss.exe\"" b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe Set value (str) \REGISTRY\USER\S-1-5-21-2288054676-1871194608-3559553667-1000\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.
Processes:
csrss.exedescription ioc process File opened for modification \??\WinMonFS csrss.exe -
Drops file in System32 directory 7 IoCs
Processes:
powershell.exepowershell.exepowershell.exepowershell.exepowershell.exepowershell.exedescription 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 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 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 -
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.
Processes:
b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exedescription ioc process File opened (read-only) \??\VBoxMiniRdrDN b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe -
Drops file in Windows directory 2 IoCs
Processes:
b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exedescription ioc process File opened for modification C:\Windows\rss b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe File created C:\Windows\rss\csrss.exe b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe -
Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
Processes:
schtasks.exeschtasks.exepid process 4624 schtasks.exe 5064 schtasks.exe -
Modifies data under HKEY_USERS 64 IoCs
Processes:
b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exepowershell.exepowershell.exepowershell.exepowershell.exepowershell.exepowershell.exedescription ioc process Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\C:\Windows\system32\,@tzres.dll,-2611 = "Bougainville Daylight Time" b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\C:\Windows\system32\,@tzres.dll,-2772 = "Omsk Standard Time" b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\Certificates powershell.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CTLs powershell.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust powershell.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\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\26\52C64B7E\C:\Windows\system32\,@tzres.dll,-341 = "Egypt Daylight Time" b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\C:\Windows\system32\,@tzres.dll,-542 = "Myanmar Standard Time" b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\C:\Windows\system32\,@tzres.dll,-2752 = "Tomsk Standard Time" b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\Certificates powershell.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\C:\Windows\system32\,@tzres.dll,-1722 = "Libya Standard Time" b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\C:\Windows\system32\,@tzres.dll,-792 = "SA Western Standard Time" b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA powershell.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CTLs powershell.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed 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\26\52C64B7E\C:\Windows\system32\,@tzres.dll,-2001 = "Cabo Verde Daylight Time" b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\C:\Windows\system32\,@tzres.dll,-241 = "Samoa Daylight Time" b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\C:\Windows\system32\,@tzres.dll,-3141 = "South Sudan Daylight Time" b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\C:\Windows\system32\,@tzres.dll,-632 = "Tokyo Standard Time" b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\Certificates 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\26\52C64B7E\C:\Windows\system32\,@tzres.dll,-214 = "Pacific Daylight Time (Mexico)" b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\C:\Windows\system32\,@tzres.dll,-1041 = "Ulaanbaatar Daylight Time" b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\Certificates powershell.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople powershell.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\C:\Windows\system32\,@tzres.dll,-2372 = "Easter Island Standard Time" b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\C:\Windows\system32\,@tzres.dll,-231 = "Hawaiian Daylight Time" b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1" powershell.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0" powershell.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CRLs powershell.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\C:\Windows\system32\,@tzres.dll,-2531 = "Chatham Islands Daylight Time" b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\Certificates powershell.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root powershell.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\C:\Windows\system32\,@tzres.dll,-1841 = "Russia TZ 4 Daylight Time" b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\C:\Windows\system32\,@tzres.dll,-202 = "US Mountain Standard Time" b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA powershell.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CTLs 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\26\52C64B7E\C:\Windows\system32\,@tzres.dll,-2181 = "Astrakhan Daylight Time" b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\C:\Windows\system32\,@tzres.dll,-141 = "Canada Central Daylight Time" b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\C:\Windows\system32\,@tzres.dll,-661 = "Cen. Australia Daylight Time" b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\C:\Windows\system32\,@tzres.dll,-332 = "E. Europe Standard Time" b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust powershell.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA powershell.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\C:\Windows\system32\,@tzres.dll,-842 = "Argentina Standard Time" b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\C:\Windows\system32\,@tzres.dll,-151 = "Central America Daylight Time" b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\C:\Windows\system32\,@tzres.dll,-272 = "Greenwich Standard Time" b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CTLs powershell.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed powershell.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust powershell.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\C:\Windows\system32\,@tzres.dll,-2392 = "Aleutian Standard Time" b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\C:\Windows\system32\,@tzres.dll,-351 = "FLE Daylight Time" b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\C:\Windows\system32\,@tzres.dll,-211 = "Pacific Daylight Time" b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\C:\Windows\system32\,@tzres.dll,-3051 = "Qyzylorda Daylight Time" b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\C:\Windows\system32\,@tzres.dll,-1411 = "Syria Daylight Time" b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CTLs powershell.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CTLs powershell.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root powershell.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA powershell.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople powershell.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\C:\Windows\system32\,@tzres.dll,-51 = "Greenland Daylight Time" b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\CTLs powershell.exe -
Suspicious behavior: EnumeratesProcesses 54 IoCs
Processes:
powershell.exeb27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exepowershell.exeb27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exepowershell.exepowershell.exepowershell.exepowershell.exepowershell.exeinjector.execsrss.exepid process 1280 powershell.exe 1280 powershell.exe 3440 b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe 3440 b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe 4104 powershell.exe 4104 powershell.exe 4104 powershell.exe 1392 b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe 1392 b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe 1392 b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe 1392 b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe 1392 b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe 1392 b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe 1392 b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe 1392 b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe 1392 b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe 1392 b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe 376 powershell.exe 376 powershell.exe 376 powershell.exe 388 powershell.exe 388 powershell.exe 388 powershell.exe 3180 powershell.exe 3180 powershell.exe 3180 powershell.exe 832 powershell.exe 832 powershell.exe 832 powershell.exe 2588 powershell.exe 2588 powershell.exe 2588 powershell.exe 4364 injector.exe 4364 injector.exe 4364 injector.exe 4364 injector.exe 4364 injector.exe 4364 injector.exe 2012 csrss.exe 2012 csrss.exe 4364 injector.exe 4364 injector.exe 4364 injector.exe 4364 injector.exe 4364 injector.exe 4364 injector.exe 2012 csrss.exe 2012 csrss.exe 4364 injector.exe 4364 injector.exe 4364 injector.exe 4364 injector.exe 4364 injector.exe 4364 injector.exe -
Suspicious use of AdjustPrivilegeToken 10 IoCs
Processes:
powershell.exeb27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exepowershell.exepowershell.exepowershell.exepowershell.exepowershell.exepowershell.execsrss.exedescription pid process Token: SeDebugPrivilege 1280 powershell.exe Token: SeDebugPrivilege 3440 b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe Token: SeImpersonatePrivilege 3440 b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe Token: SeDebugPrivilege 4104 powershell.exe Token: SeDebugPrivilege 376 powershell.exe Token: SeDebugPrivilege 388 powershell.exe Token: SeDebugPrivilege 3180 powershell.exe Token: SeDebugPrivilege 832 powershell.exe Token: SeDebugPrivilege 2588 powershell.exe Token: SeSystemEnvironmentPrivilege 2012 csrss.exe -
Suspicious use of WriteProcessMemory 30 IoCs
Processes:
b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exeb27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.execmd.execsrss.exedescription pid process target process PID 3440 wrote to memory of 1280 3440 b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe powershell.exe PID 3440 wrote to memory of 1280 3440 b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe powershell.exe PID 3440 wrote to memory of 1280 3440 b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe powershell.exe PID 1392 wrote to memory of 4104 1392 b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe powershell.exe PID 1392 wrote to memory of 4104 1392 b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe powershell.exe PID 1392 wrote to memory of 4104 1392 b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe powershell.exe PID 1392 wrote to memory of 3056 1392 b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe cmd.exe PID 1392 wrote to memory of 3056 1392 b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe cmd.exe PID 3056 wrote to memory of 1104 3056 cmd.exe netsh.exe PID 3056 wrote to memory of 1104 3056 cmd.exe netsh.exe PID 1392 wrote to memory of 376 1392 b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe powershell.exe PID 1392 wrote to memory of 376 1392 b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe powershell.exe PID 1392 wrote to memory of 376 1392 b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe powershell.exe PID 1392 wrote to memory of 388 1392 b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe powershell.exe PID 1392 wrote to memory of 388 1392 b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe powershell.exe PID 1392 wrote to memory of 388 1392 b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe powershell.exe PID 1392 wrote to memory of 2012 1392 b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe csrss.exe PID 1392 wrote to memory of 2012 1392 b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe csrss.exe PID 1392 wrote to memory of 2012 1392 b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe csrss.exe PID 2012 wrote to memory of 3180 2012 csrss.exe powershell.exe PID 2012 wrote to memory of 3180 2012 csrss.exe powershell.exe PID 2012 wrote to memory of 3180 2012 csrss.exe powershell.exe PID 2012 wrote to memory of 832 2012 csrss.exe powershell.exe PID 2012 wrote to memory of 832 2012 csrss.exe powershell.exe PID 2012 wrote to memory of 832 2012 csrss.exe powershell.exe PID 2012 wrote to memory of 2588 2012 csrss.exe powershell.exe PID 2012 wrote to memory of 2588 2012 csrss.exe powershell.exe PID 2012 wrote to memory of 2588 2012 csrss.exe powershell.exe PID 2012 wrote to memory of 4364 2012 csrss.exe injector.exe PID 2012 wrote to memory of 4364 2012 csrss.exe injector.exe -
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\b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe"C:\Users\Admin\AppData\Local\Temp\b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe"1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3440 -
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exepowershell -nologo -noprofile2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1280
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C:\Users\Admin\AppData\Local\Temp\b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.exe"C:\Users\Admin\AppData\Local\Temp\b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81.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:1392 -
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exepowershell -nologo -noprofile3⤵
- Drops file in System32 directory
- Modifies data under HKEY_USERS
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4104
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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:3056 -
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:1104
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C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exepowershell -nologo -noprofile3⤵
- Drops file in System32 directory
- Modifies data under HKEY_USERS
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:376
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C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exepowershell -nologo -noprofile3⤵
- Drops file in System32 directory
- Modifies data under HKEY_USERS
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:388
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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:2012 -
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exepowershell -nologo -noprofile4⤵
- Drops file in System32 directory
- Modifies data under HKEY_USERS
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3180
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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:4624
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C:\Windows\SYSTEM32\schtasks.exeschtasks /delete /tn ScheduledUpdate /f4⤵PID:708
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C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exepowershell -nologo -noprofile4⤵
- Drops file in System32 directory
- Modifies data under HKEY_USERS
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:832
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C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exepowershell -nologo -noprofile4⤵
- Drops file in System32 directory
- Modifies data under HKEY_USERS
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2588
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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:4364
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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:5064
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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
MD5968cb9309758126772781b83adb8a28f
SHA18da30e71accf186b2ba11da1797cf67f8f78b47c
SHA25692099c10776bb7e3f2a8d1b82d4d40d0c4627e4f1bf754a6e58dfd2c2e97042a
SHA5124bd50732f8af4d688d95999bddfd296115d7033ddc38f86c9fb1f47fde202bffa27e9088bebcaa3064ca946af2f5c1ca6cbde49d0907f0005c7ab42874515dd3
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C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-Interactive
Filesize19KB
MD51e0712340511abd598c782ee16359ba2
SHA1027ba2c987375ee99bc08663573ad1a7730fb0d7
SHA256442d4b056d0921d59e2da9b946716ce6cfb306eb5662034dd93066f3f729f4a3
SHA51257f81a90a76f26a5da70d88af839093a508eafcd12aed1be14c95cfd9be19f91be52e76718a50413a4df7bf1924ba39a4340c0b45f113f164ef122ce2eaa8dc7
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C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-Interactive
Filesize19KB
MD5449552f9ae311ac072081af9e768f5f1
SHA12daa1948a901e827aa0b35e10b632caafd476da5
SHA25611dfe2e75c827a060284b3566a072dd68e694681e3ab3a1567a392d2feca82d1
SHA51270966285bdaaa653999673ad2062fadc1c21ace96476ea55a04d6a663f122b81bd33993d55f6c6ec0ee4e46ed816916b7b0d07be3f8215824a46b87d9ff9534a
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C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-Interactive
Filesize19KB
MD53bca0993068ec55eb8c0d59f2b515497
SHA107bb73def86abf73f1f549bf4bd2d98a53902ea9
SHA2568e0a0663dd6e7e71e3d5f8605d42b38fedee143ea194dd3321c62892e22d4d97
SHA5129fbfa47de1233f63adf0aeae4c7e0fdb18e8cc5143953fdd9bd141bce2571089454cf0225458226c6f83dd8f925f4c0737885e258a90da2a1ec05300420b140e
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C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-Interactive
Filesize19KB
MD554d05ad6d08323e685cd05aaa63d3852
SHA1e15a9244e9828bb5532c788bd5de9cb30b078078
SHA256d53f26b9fc5da29d7d7548a43633e4bbfcf4418b3b400d5ec459dea7a0377466
SHA512887da591a2be2d20ffdf22e286e7e45620817972d91626c14777969828461aed15bd52105ccc37534df224ea7faa4da7a1b8c89b806b9a8fb3993139b8a5c10c
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C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-Interactive
Filesize19KB
MD5a6ec7bab8537781c9a3def7607bf2f21
SHA1754d1dda4ee29e13e67a314b20011a30ec7c5734
SHA2566b62acd2024062b1a4a4aa18a58a87ece32f9bab701e17f2cfef7b1b5423fac0
SHA5123697aff8f2f17de92f1abab249e792d80e113b6ff055e47b7862b21ce13862270d7ef8b2814ca480b1d2773e10aeb6707e19c3aed67061d845494ce7b6861f2e
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Filesize
4.2MB
MD55baacf7daa5badcc4797e877e7f0d261
SHA1e7129048ed96fc80442039a227b62b6b80a5d2c6
SHA256b27a303d6c162c5624d1b2bc527e5dd6b74954b9ba6f48074f0e88f5dcc59b81
SHA512251ed23f92471c7bda58bdd7442cee003fcdbc6773f6c951194e0df4f4ecfcef4819c0d0c036e7c0c0bfc2cedcb7517ecbe7b106aa5a5ca42b2c35edd370c332