Analysis
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max time kernel
134s -
max time network
139s -
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 08:25
Static task
static1
General
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Target
a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe
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Size
4.1MB
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MD5
44423aa20b5ddeece065c26b37141c96
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SHA1
abbb0aa82088526809e1c50183f9ebbf28cb1278
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SHA256
a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201
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SHA512
2558adf916b79abc7a53cd37ed9fc746d798d6cd35fb6c34996df6c27b26fff94aaa895fcafebe6b109254803ab3c4f2885b948bdc94fb54c1dafe4f0cd24d37
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SSDEEP
98304:R+Ap1R2Q5TqXzWWdOqeMAE/l3CDzSpE0lgeinU5Cm33Nw+Q8qb7v:R+Ap1R2Q5TqXyWdneMA8C/SpoeinU5xe
Malware Config
Signatures
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Suspicious use of NtCreateUserProcessOtherParentProcess 6 IoCs
Processes:
svchost.exedescription pid process target process PID 4836 created 1224 4836 svchost.exe a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe PID 4836 created 2392 4836 svchost.exe csrss.exe PID 4836 created 2392 4836 svchost.exe csrss.exe PID 4836 created 2392 4836 svchost.exe csrss.exe PID 4836 created 1580 4836 svchost.exe f801950a962ddba14caaa44bf084b55c.exe PID 4836 created 1580 4836 svchost.exe f801950a962ddba14caaa44bf084b55c.exe -
Executes dropped EXE 3 IoCs
Processes:
csrss.exeinjector.exef801950a962ddba14caaa44bf084b55c.exepid process 2392 csrss.exe 4460 injector.exe 1580 f801950a962ddba14caaa44bf084b55c.exe -
Modifies Windows Firewall 1 TTPs 1 IoCs
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Processes:
resource yara_rule C:\Users\Admin\AppData\Local\Temp\csrss\f801950a962ddba14caaa44bf084b55c.exe upx C:\Users\Admin\AppData\Local\Temp\csrss\f801950a962ddba14caaa44bf084b55c.exe upx behavioral1/memory/1580-157-0x0000000000400000-0x0000000000C25000-memory.dmp upx behavioral1/memory/1580-161-0x0000000000400000-0x0000000000C25000-memory.dmp upx behavioral1/memory/1580-163-0x0000000000400000-0x0000000000C25000-memory.dmp upx -
Adds Run key to start application 2 TTPs 2 IoCs
Processes:
a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.execsrss.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\Windows\\rss\\csrss.exe\"" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\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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Drops file in Windows directory 2 IoCs
Processes:
a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exedescription ioc process File opened for modification C:\Windows\rss a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe File created C:\Windows\rss\csrss.exe a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe -
Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
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Modifies data under HKEY_USERS 64 IoCs
Processes:
a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.execsrss.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" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2612 = "Bougainville Standard Time" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2412 = "Marquesas Standard Time" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CRLs csrss.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-842 = "Argentina Standard Time" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-262 = "GMT Standard Time" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2322 = "Sakhalin Standard Time" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-11 = "Azores Daylight Time" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-982 = "Kamchatka Standard Time" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2871 = "Magallanes Daylight Time" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-871 = "Pakistan Daylight Time" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1891 = "Russia TZ 3 Daylight Time" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-434 = "Georgian Daylight Time" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2342 = "Haiti Standard Time" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-372 = "Jerusalem Standard Time" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2591 = "Tocantins Daylight Time" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-105 = "Central Brazilian Standard Time" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CRLs csrss.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople csrss.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CRLs csrss.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2321 = "Sakhalin Daylight Time" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-601 = "Taipei Daylight Time" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-104 = "Central Brazilian Daylight Time" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-431 = "Iran Daylight Time" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1912 = "Russia TZ 10 Standard Time" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-371 = "Jerusalem Daylight Time" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-622 = "Korea Standard Time" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-71 = "Newfoundland Daylight Time" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1832 = "Russia TZ 2 Standard Time" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\Certificates csrss.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2001 = "Cabo Verde Daylight Time" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2372 = "Easter Island Standard Time" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2592 = "Tocantins Standard Time" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2002 = "Cabo Verde Standard Time" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2411 = "Marquesas Daylight Time" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-241 = "Samoa Daylight Time" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-692 = "Tasmania Standard Time" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-382 = "South Africa Standard Time" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2181 = "Astrakhan Daylight Time" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-82 = "Atlantic Standard Time" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-652 = "AUS Central Standard Time" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-651 = "AUS Central Daylight Time" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-352 = "FLE Standard Time" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-182 = "Mountain Standard Time (Mexico)" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-412 = "E. Africa Standard Time" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-3142 = "South Sudan Standard Time" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\CRLs csrss.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-872 = "Pakistan Standard Time" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1041 = "Ulaanbaatar Daylight Time" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed csrss.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-571 = "China Daylight Time" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-251 = "Dateline Daylight Time" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-332 = "E. Europe Standard Time" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-52 = "Greenland Standard Time" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-381 = "South Africa Daylight Time" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-532 = "Sri Lanka Standard Time" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-671 = "AUS Eastern Daylight Time" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-661 = "Cen. Australia Daylight Time" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-3141 = "South Sudan Daylight Time" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2142 = "Transbaikal Standard Time" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-732 = "Fiji Standard Time" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2452 = "Saint Pierre Standard Time" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2892 = "Sudan Standard Time" a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople csrss.exe -
Suspicious behavior: EnumeratesProcesses 64 IoCs
Processes:
a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exea5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exeinjector.execsrss.exepid process 1224 a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe 1224 a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe 4756 a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe 4756 a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe 4756 a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe 4756 a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe 4756 a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe 4756 a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe 4756 a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe 4756 a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe 4756 a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe 4756 a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe 4460 injector.exe 4460 injector.exe 4460 injector.exe 4460 injector.exe 4460 injector.exe 4460 injector.exe 4460 injector.exe 4460 injector.exe 2392 csrss.exe 2392 csrss.exe 4460 injector.exe 4460 injector.exe 4460 injector.exe 4460 injector.exe 4460 injector.exe 4460 injector.exe 2392 csrss.exe 2392 csrss.exe 4460 injector.exe 4460 injector.exe 4460 injector.exe 4460 injector.exe 4460 injector.exe 4460 injector.exe 4460 injector.exe 4460 injector.exe 4460 injector.exe 4460 injector.exe 4460 injector.exe 4460 injector.exe 4460 injector.exe 4460 injector.exe 4460 injector.exe 4460 injector.exe 4460 injector.exe 4460 injector.exe 4460 injector.exe 4460 injector.exe 4460 injector.exe 4460 injector.exe 4460 injector.exe 4460 injector.exe 4460 injector.exe 4460 injector.exe 4460 injector.exe 4460 injector.exe 4460 injector.exe 4460 injector.exe 4460 injector.exe 4460 injector.exe 4460 injector.exe 4460 injector.exe -
Suspicious use of AdjustPrivilegeToken 25 IoCs
Processes:
a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exesvchost.execsrss.exedescription pid process Token: SeDebugPrivilege 1224 a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Token: SeImpersonatePrivilege 1224 a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe Token: SeTcbPrivilege 4836 svchost.exe Token: SeTcbPrivilege 4836 svchost.exe Token: SeBackupPrivilege 4836 svchost.exe Token: SeRestorePrivilege 4836 svchost.exe Token: SeBackupPrivilege 4836 svchost.exe Token: SeRestorePrivilege 4836 svchost.exe Token: SeBackupPrivilege 4836 svchost.exe Token: SeRestorePrivilege 4836 svchost.exe Token: SeBackupPrivilege 4836 svchost.exe Token: SeRestorePrivilege 4836 svchost.exe Token: SeSystemEnvironmentPrivilege 2392 csrss.exe Token: SeBackupPrivilege 4836 svchost.exe Token: SeRestorePrivilege 4836 svchost.exe Token: SeBackupPrivilege 4836 svchost.exe Token: SeRestorePrivilege 4836 svchost.exe Token: SeBackupPrivilege 4836 svchost.exe Token: SeRestorePrivilege 4836 svchost.exe Token: SeBackupPrivilege 4836 svchost.exe Token: SeRestorePrivilege 4836 svchost.exe Token: SeBackupPrivilege 4836 svchost.exe Token: SeRestorePrivilege 4836 svchost.exe Token: SeBackupPrivilege 4836 svchost.exe Token: SeRestorePrivilege 4836 svchost.exe -
Suspicious use of WriteProcessMemory 25 IoCs
Processes:
svchost.exea5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.execmd.execsrss.exedescription pid process target process PID 4836 wrote to memory of 4756 4836 svchost.exe a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe PID 4836 wrote to memory of 4756 4836 svchost.exe a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe PID 4836 wrote to memory of 4756 4836 svchost.exe a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe PID 4756 wrote to memory of 1784 4756 a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe cmd.exe PID 4756 wrote to memory of 1784 4756 a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe cmd.exe PID 1784 wrote to memory of 4524 1784 cmd.exe netsh.exe PID 1784 wrote to memory of 4524 1784 cmd.exe netsh.exe PID 4756 wrote to memory of 2392 4756 a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe csrss.exe PID 4756 wrote to memory of 2392 4756 a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe csrss.exe PID 4756 wrote to memory of 2392 4756 a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe csrss.exe PID 4836 wrote to memory of 596 4836 svchost.exe schtasks.exe PID 4836 wrote to memory of 596 4836 svchost.exe schtasks.exe PID 4836 wrote to memory of 1168 4836 svchost.exe schtasks.exe PID 4836 wrote to memory of 1168 4836 svchost.exe schtasks.exe PID 2392 wrote to memory of 4460 2392 csrss.exe injector.exe PID 2392 wrote to memory of 4460 2392 csrss.exe injector.exe PID 4836 wrote to memory of 2340 4836 svchost.exe schtasks.exe PID 4836 wrote to memory of 2340 4836 svchost.exe schtasks.exe PID 2392 wrote to memory of 1580 2392 csrss.exe f801950a962ddba14caaa44bf084b55c.exe PID 2392 wrote to memory of 1580 2392 csrss.exe f801950a962ddba14caaa44bf084b55c.exe PID 2392 wrote to memory of 1580 2392 csrss.exe f801950a962ddba14caaa44bf084b55c.exe PID 4836 wrote to memory of 4472 4836 svchost.exe schtasks.exe PID 4836 wrote to memory of 4472 4836 svchost.exe schtasks.exe PID 4836 wrote to memory of 3552 4836 svchost.exe schtasks.exe PID 4836 wrote to memory of 3552 4836 svchost.exe schtasks.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe"C:\Users\Admin\AppData\Local\Temp\a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe"1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Users\Admin\AppData\Local\Temp\a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.exe"C:\Users\Admin\AppData\Local\Temp\a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201.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
- Modifies data under HKEY_USERS
- 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:\Users\Admin\AppData\Local\Temp\csrss\f801950a962ddba14caaa44bf084b55c.exeC:\Users\Admin\AppData\Local\Temp\csrss\f801950a962ddba14caaa44bf084b55c.exe4⤵
- Executes dropped EXE
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C:\Windows\SYSTEM32\schtasks.exeschtasks /delete /tn "csrss" /f5⤵
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C:\Windows\SYSTEM32\schtasks.exeschtasks /delete /tn "ScheduledUpdate" /f5⤵
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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\f801950a962ddba14caaa44bf084b55c.exeFilesize
3.2MB
MD5f801950a962ddba14caaa44bf084b55c
SHA17cadc9076121297428442785536ba0df2d4ae996
SHA256c3946ec89e15b24b743c46f9acacb58cff47da63f3ce2799d71ed90496b8891f
SHA5124183bc76bdc84fb779e2e573d9a63d7de47096b63b945f9e335bee95ae28eb208f5ee15f6501ac59623b97c5b77f3455ca313512e7d9803e1704ae22a52459c5
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C:\Users\Admin\AppData\Local\Temp\csrss\f801950a962ddba14caaa44bf084b55c.exeFilesize
3.2MB
MD5f801950a962ddba14caaa44bf084b55c
SHA17cadc9076121297428442785536ba0df2d4ae996
SHA256c3946ec89e15b24b743c46f9acacb58cff47da63f3ce2799d71ed90496b8891f
SHA5124183bc76bdc84fb779e2e573d9a63d7de47096b63b945f9e335bee95ae28eb208f5ee15f6501ac59623b97c5b77f3455ca313512e7d9803e1704ae22a52459c5
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C:\Users\Admin\AppData\Local\Temp\csrss\injector\NtQuerySystemInformationHook.dllFilesize
99KB
MD509031a062610d77d685c9934318b4170
SHA1880f744184e7774f3d14c1bb857e21cc7fe89a6d
SHA256778bd69af403df3c4e074c31b3850d71bf0e64524bea4272a802ca9520b379dd
SHA5129a276e1f0f55d35f2bf38eb093464f7065bdd30a660e6d1c62eed5e76d1fb2201567b89d9ae65d2d89dc99b142159e36fb73be8d5e08252a975d50544a7cda27
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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
MD544423aa20b5ddeece065c26b37141c96
SHA1abbb0aa82088526809e1c50183f9ebbf28cb1278
SHA256a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201
SHA5122558adf916b79abc7a53cd37ed9fc746d798d6cd35fb6c34996df6c27b26fff94aaa895fcafebe6b109254803ab3c4f2885b948bdc94fb54c1dafe4f0cd24d37
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C:\Windows\rss\csrss.exeFilesize
4.1MB
MD544423aa20b5ddeece065c26b37141c96
SHA1abbb0aa82088526809e1c50183f9ebbf28cb1278
SHA256a5299db844d1c31da72a50596fc710b47a6ffa7750007106f310aae9a25c6201
SHA5122558adf916b79abc7a53cd37ed9fc746d798d6cd35fb6c34996df6c27b26fff94aaa895fcafebe6b109254803ab3c4f2885b948bdc94fb54c1dafe4f0cd24d37
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memory/596-147-0x0000000000000000-mapping.dmp
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memory/1168-148-0x0000000000000000-mapping.dmp
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memory/1224-134-0x0000000000400000-0x0000000000C91000-memory.dmpFilesize
8.6MB
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memory/1224-132-0x0000000002B2C000-0x0000000002F15000-memory.dmpFilesize
3.9MB
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memory/1224-136-0x0000000000400000-0x0000000000C91000-memory.dmpFilesize
8.6MB
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memory/1224-133-0x0000000002F20000-0x0000000003797000-memory.dmpFilesize
8.5MB
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memory/1580-157-0x0000000000400000-0x0000000000C25000-memory.dmpFilesize
8.1MB
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memory/1580-163-0x0000000000400000-0x0000000000C25000-memory.dmpFilesize
8.1MB
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memory/1580-161-0x0000000000400000-0x0000000000C25000-memory.dmpFilesize
8.1MB
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memory/1580-154-0x0000000000000000-mapping.dmp
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memory/1784-137-0x0000000000000000-mapping.dmp
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memory/2340-152-0x0000000000000000-mapping.dmp
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memory/2392-158-0x0000000000400000-0x0000000000C91000-memory.dmpFilesize
8.6MB
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memory/2392-153-0x0000000000400000-0x0000000000C91000-memory.dmpFilesize
8.6MB
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memory/2392-141-0x0000000000000000-mapping.dmp
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memory/2392-146-0x0000000000400000-0x0000000000C91000-memory.dmpFilesize
8.6MB
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memory/2392-145-0x0000000002E00000-0x00000000031E9000-memory.dmpFilesize
3.9MB
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memory/3552-160-0x0000000000000000-mapping.dmp
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memory/4460-149-0x0000000000000000-mapping.dmp
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memory/4472-159-0x0000000000000000-mapping.dmp
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memory/4524-138-0x0000000000000000-mapping.dmp
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memory/4756-139-0x00000000029CF000-0x0000000002DB8000-memory.dmpFilesize
3.9MB
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memory/4756-135-0x0000000000000000-mapping.dmp
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memory/4756-140-0x0000000000400000-0x0000000000C91000-memory.dmpFilesize
8.6MB
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memory/4756-144-0x0000000000400000-0x0000000000C91000-memory.dmpFilesize
8.6MB