Analysis
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max time kernel
150s -
max time network
144s -
platform
windows10-2004_x64 -
resource
win10v2004-20230220-en -
resource tags
arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system -
submitted
25-03-2023 15:44
Static task
static1
General
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Target
1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe
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Size
4.1MB
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MD5
c176117c40b7581de17288ef73c8e049
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SHA1
18292a90eac77244e9c2c63472ae77e4cb915a8f
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SHA256
1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc
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SHA512
887fedd4f704fe094cbdc0cbf624d0b7eb0844a4bf9da73f60070a1e27af5be639572085192014d10547e820d1ead986db1b846fbed3eea8ab5a67aec21f453c
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SSDEEP
98304:l0DJDGd03aPrurdTQvyL5PCDrcYccpCmLPV92d:kiLPiOQCfcYcHmPV9o
Malware Config
Signatures
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Glupteba payload 16 IoCs
Processes:
resource yara_rule behavioral1/memory/1256-134-0x0000000005070000-0x00000000058E7000-memory.dmp family_glupteba behavioral1/memory/1256-135-0x0000000000400000-0x0000000002F48000-memory.dmp family_glupteba behavioral1/memory/4296-141-0x0000000000400000-0x0000000002F48000-memory.dmp family_glupteba behavioral1/memory/3376-148-0x0000000000400000-0x0000000002F48000-memory.dmp family_glupteba behavioral1/memory/3376-149-0x0000000000400000-0x0000000002F48000-memory.dmp family_glupteba behavioral1/memory/3376-150-0x0000000000400000-0x0000000002F48000-memory.dmp family_glupteba behavioral1/memory/3376-151-0x0000000000400000-0x0000000002F48000-memory.dmp family_glupteba behavioral1/memory/3376-152-0x0000000000400000-0x0000000002F48000-memory.dmp family_glupteba behavioral1/memory/3376-153-0x0000000000400000-0x0000000002F48000-memory.dmp family_glupteba behavioral1/memory/3376-154-0x0000000000400000-0x0000000002F48000-memory.dmp family_glupteba behavioral1/memory/3376-155-0x0000000000400000-0x0000000002F48000-memory.dmp family_glupteba behavioral1/memory/3376-156-0x0000000000400000-0x0000000002F48000-memory.dmp family_glupteba behavioral1/memory/3376-157-0x0000000000400000-0x0000000002F48000-memory.dmp family_glupteba behavioral1/memory/3376-158-0x0000000000400000-0x0000000002F48000-memory.dmp family_glupteba behavioral1/memory/3376-159-0x0000000000400000-0x0000000002F48000-memory.dmp family_glupteba behavioral1/memory/3376-160-0x0000000000400000-0x0000000002F48000-memory.dmp family_glupteba -
Modifies Windows Firewall 1 TTPs 1 IoCs
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Executes dropped EXE 2 IoCs
Processes:
csrss.exeinjector.exepid process 3376 csrss.exe 2240 injector.exe -
Adds Run key to start application 2 TTPs 2 IoCs
Processes:
1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.execsrss.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\Windows\\rss\\csrss.exe\"" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\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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Legitimate hosting services abused for malware hosting/C2 1 TTPs
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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 -
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:
1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exedescription ioc process File opened (read-only) \??\VBoxMiniRdrDN 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe -
Drops file in Windows directory 2 IoCs
Processes:
1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exedescription ioc process File opened for modification C:\Windows\rss 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe File created C:\Windows\rss\csrss.exe 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe -
Program crash 1 IoCs
Processes:
WerFault.exepid pid_target process target process 3580 4296 WerFault.exe 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.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 3628 schtasks.exe 2552 schtasks.exe -
Modifies data under HKEY_USERS 64 IoCs
Processes:
1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.execsrss.exedescription ioc process Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-352 = "FLE Standard Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-771 = "Montevideo Daylight Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2752 = "Tomsk Standard Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1721 = "Libya Daylight Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1932 = "Russia TZ 11 Standard Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2572 = "Turks and Caicos Standard Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2632 = "Norfolk Standard Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-832 = "SA Eastern Standard Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\Certificates csrss.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-12 = "Azores Standard Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-291 = "Central European Daylight Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2531 = "Chatham Islands Daylight Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2412 = "Marquesas Standard Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-841 = "Argentina Daylight Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-342 = "Egypt Standard Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-364 = "Middle East Daylight Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2062 = "North Korea Standard Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2491 = "Aus Central W. Daylight Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2792 = "Novosibirsk Standard Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CRLs csrss.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-831 = "SA Eastern Daylight Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2891 = "Sudan Daylight Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-932 = "Coordinated Universal Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-672 = "AUS Eastern Standard Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-172 = "Central Standard Time (Mexico)" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-111 = "Eastern Daylight Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-962 = "Paraguay Standard Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-662 = "Cen. Australia Standard Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2892 = "Sudan Standard Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2321 = "Sakhalin Daylight Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CRLs csrss.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-391 = "Arab Daylight Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-161 = "Central Daylight Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-492 = "India Standard Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-772 = "Montevideo Standard Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-334 = "Jordan Daylight Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-92 = "Pacific SA Standard Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-214 = "Pacific Daylight Time (Mexico)" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-302 = "Romance Standard Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2941 = "Sao Tome Daylight Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-382 = "South Africa Standard Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-402 = "Arabic Standard Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1821 = "Russia TZ 1 Daylight Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-192 = "Mountain Standard Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2791 = "Novosibirsk Daylight Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2631 = "Norfolk Daylight Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-434 = "Georgian Daylight Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1822 = "Russia TZ 1 Standard Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-602 = "Taipei Standard Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2392 = "Aleutian Standard Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2182 = "Astrakhan Standard Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-292 = "Central European Standard Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-112 = "Eastern Standard Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-462 = "Afghanistan Standard Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-842 = "Argentina Standard Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2871 = "Magallanes Daylight Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1862 = "Russia TZ 6 Standard Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-331 = "E. Europe Daylight Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2341 = "Haiti Daylight Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1931 = "Russia TZ 11 Daylight Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2612 = "Bougainville Standard Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-502 = "Nepal Standard Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-752 = "Tonga Standard Time" 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CTLs csrss.exe -
Suspicious behavior: EnumeratesProcesses 64 IoCs
Processes:
1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exeinjector.execsrss.exepid process 1256 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe 1256 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe 4296 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe 4296 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe 4296 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe 4296 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe 4296 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe 4296 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe 4296 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe 4296 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe 4296 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe 4296 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe 2240 injector.exe 2240 injector.exe 2240 injector.exe 2240 injector.exe 2240 injector.exe 2240 injector.exe 2240 injector.exe 2240 injector.exe 3376 csrss.exe 3376 csrss.exe 2240 injector.exe 2240 injector.exe 2240 injector.exe 2240 injector.exe 2240 injector.exe 2240 injector.exe 3376 csrss.exe 3376 csrss.exe 2240 injector.exe 2240 injector.exe 2240 injector.exe 2240 injector.exe 2240 injector.exe 2240 injector.exe 2240 injector.exe 2240 injector.exe 2240 injector.exe 2240 injector.exe 2240 injector.exe 2240 injector.exe 2240 injector.exe 2240 injector.exe 2240 injector.exe 2240 injector.exe 2240 injector.exe 2240 injector.exe 2240 injector.exe 2240 injector.exe 2240 injector.exe 2240 injector.exe 2240 injector.exe 2240 injector.exe 2240 injector.exe 2240 injector.exe 2240 injector.exe 2240 injector.exe 2240 injector.exe 2240 injector.exe 2240 injector.exe 2240 injector.exe 2240 injector.exe 2240 injector.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
Processes:
1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.execsrss.exedescription pid process Token: SeDebugPrivilege 1256 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Token: SeImpersonatePrivilege 1256 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe Token: SeSystemEnvironmentPrivilege 3376 csrss.exe -
Suspicious use of WriteProcessMemory 9 IoCs
Processes:
1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.execmd.execsrss.exedescription pid process target process PID 4296 wrote to memory of 1788 4296 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe cmd.exe PID 4296 wrote to memory of 1788 4296 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe cmd.exe PID 1788 wrote to memory of 3712 1788 cmd.exe netsh.exe PID 1788 wrote to memory of 3712 1788 cmd.exe netsh.exe PID 4296 wrote to memory of 3376 4296 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe csrss.exe PID 4296 wrote to memory of 3376 4296 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe csrss.exe PID 4296 wrote to memory of 3376 4296 1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe csrss.exe PID 3376 wrote to memory of 2240 3376 csrss.exe injector.exe PID 3376 wrote to memory of 2240 3376 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\1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe"C:\Users\Admin\AppData\Local\Temp\1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe"1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1256 -
C:\Users\Admin\AppData\Local\Temp\1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.exe"C:\Users\Admin\AppData\Local\Temp\1f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc.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:4296 -
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:1788 -
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:3712 -
C:\Windows\rss\csrss.exeC:\Windows\rss\csrss.exe3⤵
- Executes dropped EXE
- Adds Run key to start application
- Manipulates WinMonFS driver.
- Modifies data under HKEY_USERS
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3376 -
C:\Windows\SYSTEM32\schtasks.exeschtasks /CREATE /SC ONLOGON /RL HIGHEST /TR "C:\Windows\rss\csrss.exe" /TN csrss /F4⤵
- Creates scheduled task(s)
PID:3628 -
C:\Windows\SYSTEM32\schtasks.exeschtasks /delete /tn ScheduledUpdate /f4⤵PID:5012
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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:2240 -
C:\Windows\SYSTEM32\schtasks.exeschtasks /CREATE /SC ONLOGON /RL HIGHEST /TR "C:\Windows\rss\csrss.exe" /TN csrss /F4⤵
- Creates scheduled task(s)
PID:2552 -
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4296 -s 7923⤵
- Program crash
PID:3580
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4296 -ip 42961⤵PID:4900
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Temp\csrss\injector\injector.exeFilesize
281KB
MD5d98e33b66343e7c96158444127a117f6
SHA1bb716c5509a2bf345c6c1152f6e3e1452d39d50d
SHA2565de4e2b07a26102fe527606ce5da1d5a4b938967c9d380a3c5fe86e2e34aaaf1
SHA512705275e4a1ba8205eb799a8cf1737bc8ba686925e52c9198a6060a7abeee65552a85b814ac494a4b975d496a63be285f19a6265550585f2fc85824c42d7efab5
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C:\Users\Admin\AppData\Local\Temp\csrss\injector\injector.exeFilesize
281KB
MD5d98e33b66343e7c96158444127a117f6
SHA1bb716c5509a2bf345c6c1152f6e3e1452d39d50d
SHA2565de4e2b07a26102fe527606ce5da1d5a4b938967c9d380a3c5fe86e2e34aaaf1
SHA512705275e4a1ba8205eb799a8cf1737bc8ba686925e52c9198a6060a7abeee65552a85b814ac494a4b975d496a63be285f19a6265550585f2fc85824c42d7efab5
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C:\Windows\rss\csrss.exeFilesize
4.1MB
MD5c176117c40b7581de17288ef73c8e049
SHA118292a90eac77244e9c2c63472ae77e4cb915a8f
SHA2561f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc
SHA512887fedd4f704fe094cbdc0cbf624d0b7eb0844a4bf9da73f60070a1e27af5be639572085192014d10547e820d1ead986db1b846fbed3eea8ab5a67aec21f453c
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C:\Windows\rss\csrss.exeFilesize
4.1MB
MD5c176117c40b7581de17288ef73c8e049
SHA118292a90eac77244e9c2c63472ae77e4cb915a8f
SHA2561f44ef5b4936c4e6200719723a024fa891b9c5ed15de1a224f6fc8c9675e08cc
SHA512887fedd4f704fe094cbdc0cbf624d0b7eb0844a4bf9da73f60070a1e27af5be639572085192014d10547e820d1ead986db1b846fbed3eea8ab5a67aec21f453c
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memory/1256-135-0x0000000000400000-0x0000000002F48000-memory.dmpFilesize
43.3MB
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memory/1256-134-0x0000000005070000-0x00000000058E7000-memory.dmpFilesize
8.5MB
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memory/3376-151-0x0000000000400000-0x0000000002F48000-memory.dmpFilesize
43.3MB
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memory/3376-157-0x0000000000400000-0x0000000002F48000-memory.dmpFilesize
43.3MB
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memory/3376-149-0x0000000000400000-0x0000000002F48000-memory.dmpFilesize
43.3MB
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memory/3376-150-0x0000000000400000-0x0000000002F48000-memory.dmpFilesize
43.3MB
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memory/3376-160-0x0000000000400000-0x0000000002F48000-memory.dmpFilesize
43.3MB
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memory/3376-152-0x0000000000400000-0x0000000002F48000-memory.dmpFilesize
43.3MB
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memory/3376-153-0x0000000000400000-0x0000000002F48000-memory.dmpFilesize
43.3MB
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memory/3376-154-0x0000000000400000-0x0000000002F48000-memory.dmpFilesize
43.3MB
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memory/3376-155-0x0000000000400000-0x0000000002F48000-memory.dmpFilesize
43.3MB
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memory/3376-156-0x0000000000400000-0x0000000002F48000-memory.dmpFilesize
43.3MB
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memory/3376-148-0x0000000000400000-0x0000000002F48000-memory.dmpFilesize
43.3MB
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memory/3376-158-0x0000000000400000-0x0000000002F48000-memory.dmpFilesize
43.3MB
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memory/3376-159-0x0000000000400000-0x0000000002F48000-memory.dmpFilesize
43.3MB
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memory/4296-141-0x0000000000400000-0x0000000002F48000-memory.dmpFilesize
43.3MB