Analysis
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max time kernel
150s -
max time network
152s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
02-02-2023 17:00
Static task
static1
General
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Target
b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe
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Size
4.0MB
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MD5
4740c5f86b9a4f7ba47a78c8be2da6f2
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SHA1
85df691198d3f7814bf8c0362e1464ae6d8ad620
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SHA256
b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635
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SHA512
09e44569adb27e597bf99dca20ebe477a713a5fcbdb8cab827802b45b1c47baf54cc073581d91f7aad74b78eff28b597216a7da8170b305bfd86eac78c9e7c50
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SSDEEP
98304:TorSjpqCjRWs+aS/uZR88eK2ShU0NCUFSNTEaxJepw5ZV/iBQ10:TfjphtWs+aS/udeLShU0VYTqqxi1
Malware Config
Signatures
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Suspicious use of NtCreateUserProcessOtherParentProcess 4 IoCs
Processes:
svchost.exedescription pid process target process PID 4664 created 1476 4664 svchost.exe b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe PID 4664 created 488 4664 svchost.exe csrss.exe PID 4664 created 488 4664 svchost.exe csrss.exe PID 4664 created 488 4664 svchost.exe csrss.exe -
Modifies Windows Firewall 1 TTPs 1 IoCs
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Executes dropped EXE 2 IoCs
Processes:
csrss.exeinjector.exepid process 488 csrss.exe 4392 injector.exe -
Adds Run key to start application 2 TTPs 2 IoCs
Processes:
b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.execsrss.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\Windows\\rss\\csrss.exe\"" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\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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Drops file in Windows directory 2 IoCs
Processes:
b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exedescription ioc process File opened for modification C:\Windows\rss b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe File created C:\Windows\rss\csrss.exe b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.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 1624 schtasks.exe 1460 schtasks.exe -
Modifies data under HKEY_USERS 64 IoCs
Processes:
b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exedescription ioc process Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1021 = "Bangladesh Daylight Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-192 = "Mountain Standard Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1501 = "Turkey Daylight Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-772 = "Montevideo Standard Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2631 = "Norfolk Daylight Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1911 = "Russia TZ 10 Daylight Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-841 = "Argentina Daylight Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1022 = "Bangladesh Standard Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-141 = "Canada Central Daylight Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1802 = "Line Islands Standard Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-364 = "Middle East Daylight Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2842 = "Saratov Standard Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1412 = "Syria Standard Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-162 = "Central Standard Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2531 = "Chatham Islands Daylight Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-131 = "US Eastern Daylight Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-731 = "Fiji Daylight Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1872 = "Russia TZ 7 Standard Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2391 = "Aleutian Daylight Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-651 = "AUS Central Daylight Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-172 = "Central Standard Time (Mexico)" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-252 = "Dateline Standard Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-411 = "E. Africa Daylight Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-532 = "Sri Lanka Standard Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-251 = "Dateline Daylight Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2062 = "North Korea Standard Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-3051 = "Qyzylorda Daylight Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-602 = "Taipei Standard Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-291 = "Central European Daylight Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-161 = "Central Daylight Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2372 = "Easter Island Standard Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2182 = "Astrakhan Standard Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-681 = "E. Australia Daylight Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-541 = "Myanmar Daylight Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-215 = "Pacific Standard Time (Mexico)" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2321 = "Sakhalin Daylight Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1972 = "Belarus Standard Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-105 = "Central Brazilian Standard Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2041 = "Eastern Daylight Time (Mexico)" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-334 = "Jordan Daylight Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-448 = "Azerbaijan Daylight Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1971 = "Belarus Daylight Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2791 = "Novosibirsk Daylight Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-402 = "Arabic Standard Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-142 = "Canada Central Standard Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-232 = "Hawaiian Standard Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-335 = "Jordan Standard Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-214 = "Pacific Daylight Time (Mexico)" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1472 = "Magadan Standard Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-31 = "Mid-Atlantic Daylight Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2392 = "Aleutian Standard Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-571 = "China Daylight Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2941 = "Sao Tome Daylight Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-451 = "Caucasus Daylight Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2431 = "Cuba Daylight Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1842 = "Russia TZ 4 Standard Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-501 = "Nepal Daylight Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-392 = "Arab Standard Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-432 = "Iran Standard Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2771 = "Omsk Daylight Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-962 = "Paraguay Standard Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-661 = "Cen. Australia Daylight Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-911 = "Mauritius Daylight Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-301 = "Romance Daylight Time" b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe -
Suspicious behavior: EnumeratesProcesses 64 IoCs
Processes:
b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exeb61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exeinjector.execsrss.exepid process 1476 b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe 1476 b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe 2764 b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe 2764 b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe 2764 b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe 2764 b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe 2764 b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe 2764 b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe 2764 b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe 2764 b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe 2764 b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe 2764 b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe 4392 injector.exe 4392 injector.exe 4392 injector.exe 4392 injector.exe 4392 injector.exe 4392 injector.exe 488 csrss.exe 488 csrss.exe 4392 injector.exe 4392 injector.exe 4392 injector.exe 4392 injector.exe 4392 injector.exe 4392 injector.exe 488 csrss.exe 488 csrss.exe 4392 injector.exe 4392 injector.exe 4392 injector.exe 4392 injector.exe 4392 injector.exe 4392 injector.exe 4392 injector.exe 4392 injector.exe 4392 injector.exe 4392 injector.exe 4392 injector.exe 4392 injector.exe 4392 injector.exe 4392 injector.exe 4392 injector.exe 4392 injector.exe 4392 injector.exe 4392 injector.exe 4392 injector.exe 4392 injector.exe 4392 injector.exe 4392 injector.exe 4392 injector.exe 4392 injector.exe 4392 injector.exe 4392 injector.exe 4392 injector.exe 4392 injector.exe 4392 injector.exe 4392 injector.exe 4392 injector.exe 4392 injector.exe 4392 injector.exe 4392 injector.exe 4392 injector.exe 4392 injector.exe -
Suspicious use of AdjustPrivilegeToken 17 IoCs
Processes:
b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exesvchost.execsrss.exedescription pid process Token: SeDebugPrivilege 1476 b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Token: SeImpersonatePrivilege 1476 b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe Token: SeTcbPrivilege 4664 svchost.exe Token: SeTcbPrivilege 4664 svchost.exe Token: SeBackupPrivilege 4664 svchost.exe Token: SeRestorePrivilege 4664 svchost.exe Token: SeBackupPrivilege 4664 svchost.exe Token: SeRestorePrivilege 4664 svchost.exe Token: SeBackupPrivilege 4664 svchost.exe Token: SeRestorePrivilege 4664 svchost.exe Token: SeBackupPrivilege 4664 svchost.exe Token: SeRestorePrivilege 4664 svchost.exe Token: SeSystemEnvironmentPrivilege 488 csrss.exe Token: SeBackupPrivilege 4664 svchost.exe Token: SeRestorePrivilege 4664 svchost.exe Token: SeBackupPrivilege 4664 svchost.exe Token: SeRestorePrivilege 4664 svchost.exe -
Suspicious use of WriteProcessMemory 18 IoCs
Processes:
svchost.exeb61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.execmd.execsrss.exedescription pid process target process PID 4664 wrote to memory of 2764 4664 svchost.exe b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe PID 4664 wrote to memory of 2764 4664 svchost.exe b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe PID 4664 wrote to memory of 2764 4664 svchost.exe b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe PID 2764 wrote to memory of 260 2764 b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe cmd.exe PID 2764 wrote to memory of 260 2764 b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe cmd.exe PID 260 wrote to memory of 4500 260 cmd.exe netsh.exe PID 260 wrote to memory of 4500 260 cmd.exe netsh.exe PID 2764 wrote to memory of 488 2764 b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe csrss.exe PID 2764 wrote to memory of 488 2764 b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe csrss.exe PID 2764 wrote to memory of 488 2764 b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe csrss.exe PID 4664 wrote to memory of 1624 4664 svchost.exe schtasks.exe PID 4664 wrote to memory of 1624 4664 svchost.exe schtasks.exe PID 4664 wrote to memory of 4508 4664 svchost.exe schtasks.exe PID 4664 wrote to memory of 4508 4664 svchost.exe schtasks.exe PID 488 wrote to memory of 4392 488 csrss.exe injector.exe PID 488 wrote to memory of 4392 488 csrss.exe injector.exe PID 4664 wrote to memory of 1460 4664 svchost.exe schtasks.exe PID 4664 wrote to memory of 1460 4664 svchost.exe schtasks.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe"C:\Users\Admin\AppData\Local\Temp\b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe"1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Users\Admin\AppData\Local\Temp\b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe"C:\Users\Admin\AppData\Local\Temp\b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635.exe"2⤵
- Adds Run key to start application
- Drops file in Windows directory
- Modifies data under HKEY_USERS
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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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
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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
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C:\Windows\rss\csrss.exeC:\Windows\rss\csrss.exe3⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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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)
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C:\Windows\SYSTEM32\schtasks.exeschtasks /delete /tn ScheduledUpdate /f4⤵
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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
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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)
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k netsvcs -p -s seclogon1⤵
- Suspicious use of NtCreateUserProcessOtherParentProcess
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Temp\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
4.0MB
MD54740c5f86b9a4f7ba47a78c8be2da6f2
SHA185df691198d3f7814bf8c0362e1464ae6d8ad620
SHA256b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635
SHA51209e44569adb27e597bf99dca20ebe477a713a5fcbdb8cab827802b45b1c47baf54cc073581d91f7aad74b78eff28b597216a7da8170b305bfd86eac78c9e7c50
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C:\Windows\rss\csrss.exeFilesize
4.0MB
MD54740c5f86b9a4f7ba47a78c8be2da6f2
SHA185df691198d3f7814bf8c0362e1464ae6d8ad620
SHA256b61f291f8844d721033c1e359c860ef80caa23eb5a121cc94582ac53c36a5635
SHA51209e44569adb27e597bf99dca20ebe477a713a5fcbdb8cab827802b45b1c47baf54cc073581d91f7aad74b78eff28b597216a7da8170b305bfd86eac78c9e7c50
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memory/260-139-0x0000000000000000-mapping.dmp
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memory/488-147-0x0000000002E00000-0x00000000031E9000-memory.dmpFilesize
3.9MB
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memory/488-148-0x0000000000400000-0x0000000000C91000-memory.dmpFilesize
8.6MB
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memory/488-153-0x0000000000400000-0x0000000000C91000-memory.dmpFilesize
8.6MB
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memory/488-141-0x0000000000000000-mapping.dmp
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memory/1460-152-0x0000000000000000-mapping.dmp
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memory/1476-132-0x0000000002B74000-0x0000000002F5D000-memory.dmpFilesize
3.9MB
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memory/1476-136-0x0000000000400000-0x0000000000C91000-memory.dmpFilesize
8.6MB
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memory/1476-133-0x0000000002F60000-0x00000000037D7000-memory.dmpFilesize
8.5MB
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memory/1476-134-0x0000000000400000-0x0000000000C91000-memory.dmpFilesize
8.6MB
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memory/1624-145-0x0000000000000000-mapping.dmp
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memory/2764-135-0x0000000000000000-mapping.dmp
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memory/2764-144-0x0000000000400000-0x0000000000C91000-memory.dmpFilesize
8.6MB
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memory/2764-137-0x0000000002B19000-0x0000000002F02000-memory.dmpFilesize
3.9MB
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memory/2764-138-0x0000000000400000-0x0000000000C91000-memory.dmpFilesize
8.6MB
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memory/4392-149-0x0000000000000000-mapping.dmp
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memory/4500-140-0x0000000000000000-mapping.dmp
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memory/4508-146-0x0000000000000000-mapping.dmp