Analysis
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max time kernel
93s -
max time network
94s -
platform
windows10-2004_x64 -
resource
win10v2004-20240802-en -
resource tags
arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system -
submitted
02/10/2024, 10:30
Static task
static1
Behavioral task
behavioral1
Sample
80f23a972fffc3bb72a7a8fa64aa0f7390b87af4410d50145b1567e46c1f037aN.dll
Resource
win7-20240903-en
General
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Target
80f23a972fffc3bb72a7a8fa64aa0f7390b87af4410d50145b1567e46c1f037aN.dll
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Size
1.1MB
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MD5
93a8c85a4850c713e058d195a7284f50
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SHA1
042e5a60277ed2cc5bf24723215442f5d845294f
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SHA256
80f23a972fffc3bb72a7a8fa64aa0f7390b87af4410d50145b1567e46c1f037a
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SHA512
8d21a3f23406262b373a1e65565368951d0600c48ffb8b04bb132961ca7a2e57cc484745b4fac90bdb7db0a3e7c707d74bca29e3fa87f5350358206944e6822d
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SSDEEP
24576:Q4/2xTokuPPRz3sFRI4LNpY4u6tm/wM02I5:As3V3INpDtm/N0
Malware Config
Signatures
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Modifies firewall policy service 3 TTPs 4 IoCs
description ioc Process Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List rundll32Srv.exe Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile rundll32Srv.exe Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications rundll32Srv.exe Set value (str) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\C:\Windows\SysWOW64\rundll32Srv.exe = "C:\\Windows\\SysWOW64\\rundll32Srv.exe:*:enabled:@shell32.dll,-1" rundll32Srv.exe -
Executes dropped EXE 1 IoCs
pid Process 3588 rundll32Srv.exe -
Drops file in System32 directory 1 IoCs
description ioc Process File created C:\Windows\SysWOW64\rundll32Srv.exe rundll32.exe -
resource yara_rule behavioral2/files/0x00080000000234c6-3.dat upx behavioral2/memory/3588-4-0x0000000000400000-0x0000000000435000-memory.dmp upx behavioral2/memory/3588-11-0x0000000000400000-0x0000000000435000-memory.dmp upx behavioral2/memory/3588-18-0x0000000000400000-0x0000000000435000-memory.dmp upx -
Drops file in Program Files directory 3 IoCs
description ioc Process File opened for modification C:\Program Files (x86)\Microsoft\pxAC3E.tmp rundll32Srv.exe File created C:\Program Files (x86)\Microsoft\DesktopLayer.exe rundll32Srv.exe File opened for modification C:\Program Files (x86)\Microsoft\DesktopLayer.exe rundll32Srv.exe -
Program crash 1 IoCs
pid pid_target Process procid_target 1648 3588 WerFault.exe 83 -
System Location Discovery: System Language Discovery 1 TTPs 2 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language rundll32.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language rundll32Srv.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 3588 rundll32Srv.exe 3588 rundll32Srv.exe -
Suspicious behavior: MapViewOfSection 64 IoCs
pid Process 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe 3588 rundll32Srv.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 3588 rundll32Srv.exe -
Suspicious use of WriteProcessMemory 64 IoCs
description pid Process procid_target PID 1772 wrote to memory of 2820 1772 rundll32.exe 82 PID 1772 wrote to memory of 2820 1772 rundll32.exe 82 PID 1772 wrote to memory of 2820 1772 rundll32.exe 82 PID 2820 wrote to memory of 3588 2820 rundll32.exe 83 PID 2820 wrote to memory of 3588 2820 rundll32.exe 83 PID 2820 wrote to memory of 3588 2820 rundll32.exe 83 PID 3588 wrote to memory of 612 3588 rundll32Srv.exe 5 PID 3588 wrote to memory of 612 3588 rundll32Srv.exe 5 PID 3588 wrote to memory of 612 3588 rundll32Srv.exe 5 PID 3588 wrote to memory of 612 3588 rundll32Srv.exe 5 PID 3588 wrote to memory of 612 3588 rundll32Srv.exe 5 PID 3588 wrote to memory of 612 3588 rundll32Srv.exe 5 PID 3588 wrote to memory of 672 3588 rundll32Srv.exe 7 PID 3588 wrote to memory of 672 3588 rundll32Srv.exe 7 PID 3588 wrote to memory of 672 3588 rundll32Srv.exe 7 PID 3588 wrote to memory of 672 3588 rundll32Srv.exe 7 PID 3588 wrote to memory of 672 3588 rundll32Srv.exe 7 PID 3588 wrote to memory of 672 3588 rundll32Srv.exe 7 PID 3588 wrote to memory of 784 3588 rundll32Srv.exe 8 PID 3588 wrote to memory of 784 3588 rundll32Srv.exe 8 PID 3588 wrote to memory of 784 3588 rundll32Srv.exe 8 PID 3588 wrote to memory of 784 3588 rundll32Srv.exe 8 PID 3588 wrote to memory of 784 3588 rundll32Srv.exe 8 PID 3588 wrote to memory of 784 3588 rundll32Srv.exe 8 PID 3588 wrote to memory of 792 3588 rundll32Srv.exe 9 PID 3588 wrote to memory of 792 3588 rundll32Srv.exe 9 PID 3588 wrote to memory of 792 3588 rundll32Srv.exe 9 PID 3588 wrote to memory of 792 3588 rundll32Srv.exe 9 PID 3588 wrote to memory of 792 3588 rundll32Srv.exe 9 PID 3588 wrote to memory of 792 3588 rundll32Srv.exe 9 PID 3588 wrote to memory of 800 3588 rundll32Srv.exe 10 PID 3588 wrote to memory of 800 3588 rundll32Srv.exe 10 PID 3588 wrote to memory of 800 3588 rundll32Srv.exe 10 PID 3588 wrote to memory of 800 3588 rundll32Srv.exe 10 PID 3588 wrote to memory of 800 3588 rundll32Srv.exe 10 PID 3588 wrote to memory of 800 3588 rundll32Srv.exe 10 PID 3588 wrote to memory of 908 3588 rundll32Srv.exe 11 PID 3588 wrote to memory of 908 3588 rundll32Srv.exe 11 PID 3588 wrote to memory of 908 3588 rundll32Srv.exe 11 PID 3588 wrote to memory of 908 3588 rundll32Srv.exe 11 PID 3588 wrote to memory of 908 3588 rundll32Srv.exe 11 PID 3588 wrote to memory of 908 3588 rundll32Srv.exe 11 PID 3588 wrote to memory of 956 3588 rundll32Srv.exe 12 PID 3588 wrote to memory of 956 3588 rundll32Srv.exe 12 PID 3588 wrote to memory of 956 3588 rundll32Srv.exe 12 PID 3588 wrote to memory of 956 3588 rundll32Srv.exe 12 PID 3588 wrote to memory of 956 3588 rundll32Srv.exe 12 PID 3588 wrote to memory of 956 3588 rundll32Srv.exe 12 PID 3588 wrote to memory of 376 3588 rundll32Srv.exe 13 PID 3588 wrote to memory of 376 3588 rundll32Srv.exe 13 PID 3588 wrote to memory of 376 3588 rundll32Srv.exe 13 PID 3588 wrote to memory of 376 3588 rundll32Srv.exe 13 PID 3588 wrote to memory of 376 3588 rundll32Srv.exe 13 PID 3588 wrote to memory of 376 3588 rundll32Srv.exe 13 PID 3588 wrote to memory of 868 3588 rundll32Srv.exe 14 PID 3588 wrote to memory of 868 3588 rundll32Srv.exe 14 PID 3588 wrote to memory of 868 3588 rundll32Srv.exe 14 PID 3588 wrote to memory of 868 3588 rundll32Srv.exe 14 PID 3588 wrote to memory of 868 3588 rundll32Srv.exe 14 PID 3588 wrote to memory of 868 3588 rundll32Srv.exe 14 PID 3588 wrote to memory of 900 3588 rundll32Srv.exe 15 PID 3588 wrote to memory of 900 3588 rundll32Srv.exe 15 PID 3588 wrote to memory of 900 3588 rundll32Srv.exe 15 PID 3588 wrote to memory of 900 3588 rundll32Srv.exe 15
Processes
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C:\Windows\system32\winlogon.exewinlogon.exe1⤵PID:612
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C:\Windows\system32\fontdrvhost.exe"fontdrvhost.exe"2⤵PID:792
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C:\Windows\system32\dwm.exe"dwm.exe"2⤵PID:376
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C:\Windows\system32\lsass.exeC:\Windows\system32\lsass.exe1⤵PID:672
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C:\Windows\system32\fontdrvhost.exe"fontdrvhost.exe"1⤵PID:784
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k DcomLaunch -p1⤵PID:800
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C:\Windows\system32\wbem\unsecapp.exeC:\Windows\system32\wbem\unsecapp.exe -Embedding2⤵PID:2220
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C:\Windows\system32\DllHost.exeC:\Windows\system32\DllHost.exe /Processid:{3EB3C877-1F16-487C-9050-104DBCD66683}2⤵PID:3700
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C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe"C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca2⤵PID:3832
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C:\Windows\System32\RuntimeBroker.exeC:\Windows\System32\RuntimeBroker.exe -Embedding2⤵PID:3900
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C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe"C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca2⤵PID:3992
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C:\Windows\System32\RuntimeBroker.exeC:\Windows\System32\RuntimeBroker.exe -Embedding2⤵PID:3808
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C:\Windows\system32\SppExtComObj.exeC:\Windows\system32\SppExtComObj.exe -Embedding2⤵PID:3840
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C:\Windows\system32\DllHost.exeC:\Windows\system32\DllHost.exe /Processid:{3EB3C877-1F16-487C-9050-104DBCD66683}2⤵PID:4552
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C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\InputApp\TextInputHost.exe"C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\InputApp\TextInputHost.exe" -ServerName:InputApp.AppX9jnwykgrccxc8by3hsrsh07r423xzvav.mca2⤵PID:4736
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C:\Windows\System32\RuntimeBroker.exeC:\Windows\System32\RuntimeBroker.exe -Embedding2⤵PID:4216
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k RPCSS -p1⤵PID:908
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k DcomLaunch -p -s LSM1⤵PID:956
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C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k LocalSystemNetworkRestricted -p -s NcbService1⤵PID:868
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C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k LocalServiceNetworkRestricted -p -s lmhosts1⤵PID:900
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k LocalServiceNetworkRestricted -p -s TimeBrokerSvc1⤵PID:1028
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k netsvcs -p -s gpsvc1⤵PID:1036
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k LocalServiceNoNetwork -p1⤵PID:1104
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C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k LocalServiceNetworkRestricted -p -s EventLog1⤵PID:1132
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k LocalService -p -s nsi1⤵PID:1252
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k netsvcs -p -s Schedule1⤵PID:1292
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C:\Windows\system32\taskhostw.exetaskhostw.exe {222A245B-E637-4AE9-A93F-A59CA119A75E}2⤵PID:768
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C:\Windows\system32\MusNotification.exeC:\Windows\system32\MusNotification.exe2⤵PID:2408
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k LocalServiceNetworkRestricted -p -s Dhcp1⤵PID:1364
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k netsvcs -p -s ProfSvc1⤵PID:1380
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k LocalService -p -s DispBrokerDesktopSvc1⤵PID:1388
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k LocalService -p -s EventSystem1⤵PID:1424
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C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k netsvcs -p -s Themes1⤵PID:1440
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k netsvcs -p -s UserManager1⤵PID:1548
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C:\Windows\system32\sihost.exesihost.exe2⤵PID:2988
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C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k NetworkService -p -s NlaSvc1⤵PID:1620
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k netsvcs -p -s SENS1⤵PID:1736
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C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k LocalService -p -s netprofm1⤵PID:1784
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C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k LocalSystemNetworkRestricted -p -s AudioEndpointBuilder1⤵PID:1824
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C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k LocalServiceNetworkRestricted -p1⤵PID:1932
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k NetworkService -p -s Dnscache1⤵PID:1992
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C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k LocalServiceNetworkRestricted -p1⤵PID:2032
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C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k netsvcs -p -s ShellHWDetection1⤵PID:1664
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k netsvcs -p -s Winmgmt1⤵PID:1812
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k appmodel -p -s StateRepository1⤵PID:1980
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C:\Windows\System32\spoolsv.exeC:\Windows\System32\spoolsv.exe1⤵PID:2136
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k LocalServiceNoNetworkFirewall -p1⤵PID:2176
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C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k NetworkService -p -s LanmanWorkstation1⤵PID:2224
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C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k LocalServiceNetworkRestricted -s RmSvc1⤵PID:2444
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k netsvcs -p -s IKEEXT1⤵PID:2492
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k NetworkServiceNetworkRestricted -p -s PolicyAgent1⤵PID:2516
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k NetworkService -p -s CryptSvc1⤵PID:2628
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C:\Windows\sysmon.exeC:\Windows\sysmon.exe1⤵PID:2656
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C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k LocalSystemNetworkRestricted -p -s TrkWks1⤵PID:2684
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k netsvcs -p -s WpnService1⤵PID:2696
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k netsvcs -p -s LanmanServer1⤵PID:2748
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k UnistackSvcGroup -s CDPUserSvc1⤵PID:2996
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k netsvcs -p -s TokenBroker1⤵PID:2692
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k LocalService -p -s CDPSvc1⤵PID:3296
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C:\Windows\Explorer.EXEC:\Windows\Explorer.EXE1⤵PID:3392
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C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\80f23a972fffc3bb72a7a8fa64aa0f7390b87af4410d50145b1567e46c1f037aN.dll,#12⤵
- Suspicious use of WriteProcessMemory
PID:1772 -
C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\80f23a972fffc3bb72a7a8fa64aa0f7390b87af4410d50145b1567e46c1f037aN.dll,#13⤵
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2820 -
C:\Windows\SysWOW64\rundll32Srv.exeC:\Windows\SysWOW64\rundll32Srv.exe4⤵
- Modifies firewall policy service
- Executes dropped EXE
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3588 -
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3588 -s 6765⤵
- Program crash
PID:1648
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k ClipboardSvcGroup -p -s cbdhsvc1⤵PID:3524
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k netsvcs -p -s wlidsvc1⤵PID:5036
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C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k LocalSystemNetworkRestricted -p -s StorSvc1⤵PID:4676
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k LocalServiceAndNoImpersonation -p -s SSDPSRV1⤵PID:1044
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k LocalServiceNetworkRestricted -p -s WinHttpAutoProxySvc1⤵PID:4728
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C:\Program Files\Common Files\Microsoft Shared\ClickToRun\OfficeClickToRun.exe"C:\Program Files\Common Files\Microsoft Shared\ClickToRun\OfficeClickToRun.exe" /service1⤵PID:4320
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C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k LocalService -p -s LicenseManager1⤵PID:3884
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k LocalServiceNetworkRestricted -p -s NgcCtnrSvc1⤵PID:2892
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3588 -ip 35881⤵PID:3416
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
84KB
MD5bebe695bc853caee203554d5e7993436
SHA196d4cb0b14df2cff1a108beebbc5757752564298
SHA256a46380a6ec51f5076a7039970bcc5eb8fbb25db7e66ec260e32a7d99be89af1f
SHA5120ddeda0885a5303f3cacebf44c72ae67a83512f3c52cb85af585deb3ea1c38f720d16040f95cb7fbf979bffc3b448d67540c5b91da157f5c37a2398cefa5f327