Analysis
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max time kernel
149s -
max time network
150s -
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 12:02
Static task
static1
General
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Target
16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe
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Size
4.0MB
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MD5
785700a5fb5c91d8a96b19f755aa72b6
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SHA1
ed5c96fb514467f0e7ab217d4da4189d3affb560
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SHA256
16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df
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SHA512
120105bf9e6f224b28015ac230f27027fa2586fbc718dfa15108181847e4eb04df65d5fcdba2c85f894c9e3334bbf7c9afa260f6d86f6ce9ff73fbcdcdd94aa8
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SSDEEP
98304:kKSybp/tyeGPyMfPx5cH3hM5EeTXadChs:HSyFGjjcH33dh
Malware Config
Signatures
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Suspicious use of NtCreateUserProcessOtherParentProcess 6 IoCs
Processes:
svchost.exedescription pid process target process PID 4116 created 1912 4116 svchost.exe 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe PID 4116 created 4968 4116 svchost.exe csrss.exe PID 4116 created 4968 4116 svchost.exe csrss.exe PID 4116 created 4968 4116 svchost.exe csrss.exe PID 4116 created 4768 4116 svchost.exe f801950a962ddba14caaa44bf084b55c.exe PID 4116 created 4768 4116 svchost.exe f801950a962ddba14caaa44bf084b55c.exe -
Executes dropped EXE 3 IoCs
Processes:
csrss.exeinjector.exef801950a962ddba14caaa44bf084b55c.exepid process 4968 csrss.exe 4204 injector.exe 4768 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/4768-157-0x0000000000400000-0x0000000000C25000-memory.dmp upx behavioral1/memory/4768-161-0x0000000000400000-0x0000000000C25000-memory.dmp upx behavioral1/memory/4768-163-0x0000000000400000-0x0000000000C25000-memory.dmp upx -
Adds Run key to start application 2 TTPs 2 IoCs
Processes:
16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.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\"" 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.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:
16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exedescription ioc process File opened for modification C:\Windows\rss 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe File created C:\Windows\rss\csrss.exe 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.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:
16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.execsrss.exedescription ioc process Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-682 = "E. Australia Standard Time" 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2842 = "Saratov Standard Time" 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-121 = "SA Pacific Daylight Time" 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-842 = "Argentina Standard Time" 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-211 = "Pacific Daylight Time" 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1971 = "Belarus Daylight Time" 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1041 = "Ulaanbaatar Daylight Time" 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-361 = "GTB Daylight Time" 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-392 = "Arab Standard Time" 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-731 = "Fiji Daylight Time" 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople csrss.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-502 = "Nepal Standard Time" 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.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,-435 = "Georgian Standard Time" 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CTLs csrss.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-71 = "Newfoundland Daylight Time" 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1042 = "Ulaanbaatar Standard Time" 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2531 = "Chatham Islands Daylight Time" 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2512 = "Lord Howe Standard Time" 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-122 = "SA Pacific Standard Time" 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed csrss.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CRLs csrss.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2391 = "Aleutian Daylight Time" 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-191 = "Mountain Daylight Time" 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-541 = "Myanmar Daylight Time" 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-692 = "Tasmania Standard Time" 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-591 = "Malay Peninsula Daylight Time" 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1412 = "Syria Standard Time" 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.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" 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-221 = "Alaskan Daylight Time" 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1472 = "Magadan Standard Time" 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-232 = "Hawaiian Standard Time" 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-742 = "New Zealand Standard Time" 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-601 = "Taipei Daylight Time" 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA csrss.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2611 = "Bougainville Daylight Time" 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2001 = "Cabo Verde Daylight Time" 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CTLs csrss.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2182 = "Astrakhan Standard Time" 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1871 = "Russia TZ 7 Daylight Time" 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-961 = "Paraguay Daylight Time" 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CTLs csrss.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2431 = "Cuba Daylight Time" 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-91 = "Pacific SA Daylight Time" 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CRLs csrss.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-251 = "Dateline Daylight Time" 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.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,-2162 = "Altai Standard Time" 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.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,-411 = "E. Africa Daylight Time" 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-651 = "AUS Central Daylight Time" 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-451 = "Caucasus Daylight Time" 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust csrss.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-41 = "E. South America Daylight Time" 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CTLs csrss.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2942 = "Sao Tome Standard Time" 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2492 = "Aus Central W. Standard Time" 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-362 = "GTB Standard Time" 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-352 = "FLE Standard Time" 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-365 = "Middle East Standard Time" 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2792 = "Novosibirsk Standard Time" 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-3051 = "Qyzylorda Daylight Time" 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.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" 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2322 = "Sakhalin Standard Time" 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe -
Suspicious behavior: EnumeratesProcesses 64 IoCs
Processes:
16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exeinjector.execsrss.exepid process 1912 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe 1912 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe 776 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe 776 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe 776 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe 776 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe 776 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe 776 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe 776 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe 776 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe 776 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe 776 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe 4204 injector.exe 4204 injector.exe 4204 injector.exe 4204 injector.exe 4204 injector.exe 4204 injector.exe 4968 csrss.exe 4968 csrss.exe 4204 injector.exe 4204 injector.exe 4204 injector.exe 4204 injector.exe 4204 injector.exe 4204 injector.exe 4968 csrss.exe 4968 csrss.exe 4204 injector.exe 4204 injector.exe 4204 injector.exe 4204 injector.exe 4204 injector.exe 4204 injector.exe 4204 injector.exe 4204 injector.exe 4204 injector.exe 4204 injector.exe 4204 injector.exe 4204 injector.exe 4204 injector.exe 4204 injector.exe 4204 injector.exe 4204 injector.exe 4204 injector.exe 4204 injector.exe 4204 injector.exe 4204 injector.exe 4204 injector.exe 4204 injector.exe 4204 injector.exe 4204 injector.exe 4204 injector.exe 4204 injector.exe 4204 injector.exe 4204 injector.exe 4204 injector.exe 4204 injector.exe 4204 injector.exe 4204 injector.exe 4204 injector.exe 4204 injector.exe 4204 injector.exe 4204 injector.exe -
Suspicious use of AdjustPrivilegeToken 25 IoCs
Processes:
16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exesvchost.execsrss.exedescription pid process Token: SeDebugPrivilege 1912 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe Token: SeImpersonatePrivilege 1912 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe Token: SeTcbPrivilege 4116 svchost.exe Token: SeTcbPrivilege 4116 svchost.exe Token: SeBackupPrivilege 4116 svchost.exe Token: SeRestorePrivilege 4116 svchost.exe Token: SeBackupPrivilege 4116 svchost.exe Token: SeRestorePrivilege 4116 svchost.exe Token: SeBackupPrivilege 4116 svchost.exe Token: SeRestorePrivilege 4116 svchost.exe Token: SeBackupPrivilege 4116 svchost.exe Token: SeRestorePrivilege 4116 svchost.exe Token: SeSystemEnvironmentPrivilege 4968 csrss.exe Token: SeBackupPrivilege 4116 svchost.exe Token: SeRestorePrivilege 4116 svchost.exe Token: SeBackupPrivilege 4116 svchost.exe Token: SeRestorePrivilege 4116 svchost.exe Token: SeBackupPrivilege 4116 svchost.exe Token: SeRestorePrivilege 4116 svchost.exe Token: SeBackupPrivilege 4116 svchost.exe Token: SeRestorePrivilege 4116 svchost.exe Token: SeBackupPrivilege 4116 svchost.exe Token: SeRestorePrivilege 4116 svchost.exe Token: SeBackupPrivilege 4116 svchost.exe Token: SeRestorePrivilege 4116 svchost.exe -
Suspicious use of WriteProcessMemory 25 IoCs
Processes:
svchost.exe16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.execmd.execsrss.exedescription pid process target process PID 4116 wrote to memory of 776 4116 svchost.exe 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe PID 4116 wrote to memory of 776 4116 svchost.exe 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe PID 4116 wrote to memory of 776 4116 svchost.exe 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe PID 776 wrote to memory of 5004 776 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe cmd.exe PID 776 wrote to memory of 5004 776 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe cmd.exe PID 5004 wrote to memory of 4928 5004 cmd.exe netsh.exe PID 5004 wrote to memory of 4928 5004 cmd.exe netsh.exe PID 776 wrote to memory of 4968 776 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe csrss.exe PID 776 wrote to memory of 4968 776 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe csrss.exe PID 776 wrote to memory of 4968 776 16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe csrss.exe PID 4116 wrote to memory of 1364 4116 svchost.exe schtasks.exe PID 4116 wrote to memory of 1364 4116 svchost.exe schtasks.exe PID 4116 wrote to memory of 4576 4116 svchost.exe schtasks.exe PID 4116 wrote to memory of 4576 4116 svchost.exe schtasks.exe PID 4968 wrote to memory of 4204 4968 csrss.exe injector.exe PID 4968 wrote to memory of 4204 4968 csrss.exe injector.exe PID 4116 wrote to memory of 212 4116 svchost.exe schtasks.exe PID 4116 wrote to memory of 212 4116 svchost.exe schtasks.exe PID 4968 wrote to memory of 4768 4968 csrss.exe f801950a962ddba14caaa44bf084b55c.exe PID 4968 wrote to memory of 4768 4968 csrss.exe f801950a962ddba14caaa44bf084b55c.exe PID 4968 wrote to memory of 4768 4968 csrss.exe f801950a962ddba14caaa44bf084b55c.exe PID 4116 wrote to memory of 1152 4116 svchost.exe schtasks.exe PID 4116 wrote to memory of 1152 4116 svchost.exe schtasks.exe PID 4116 wrote to memory of 932 4116 svchost.exe schtasks.exe PID 4116 wrote to memory of 932 4116 svchost.exe schtasks.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe"C:\Users\Admin\AppData\Local\Temp\16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe"1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Users\Admin\AppData\Local\Temp\16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.exe"C:\Users\Admin\AppData\Local\Temp\16c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df.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
4.0MB
MD5785700a5fb5c91d8a96b19f755aa72b6
SHA1ed5c96fb514467f0e7ab217d4da4189d3affb560
SHA25616c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df
SHA512120105bf9e6f224b28015ac230f27027fa2586fbc718dfa15108181847e4eb04df65d5fcdba2c85f894c9e3334bbf7c9afa260f6d86f6ce9ff73fbcdcdd94aa8
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C:\Windows\rss\csrss.exeFilesize
4.0MB
MD5785700a5fb5c91d8a96b19f755aa72b6
SHA1ed5c96fb514467f0e7ab217d4da4189d3affb560
SHA25616c10521e4d5f56ea405fdc6b2bdb6977c3bc75f6550615a02f967e5dcf370df
SHA512120105bf9e6f224b28015ac230f27027fa2586fbc718dfa15108181847e4eb04df65d5fcdba2c85f894c9e3334bbf7c9afa260f6d86f6ce9ff73fbcdcdd94aa8
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memory/212-152-0x0000000000000000-mapping.dmp
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memory/776-140-0x0000000000400000-0x0000000000C91000-memory.dmpFilesize
8.6MB
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memory/776-139-0x0000000002D19000-0x0000000003102000-memory.dmpFilesize
3.9MB
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memory/776-144-0x0000000000400000-0x0000000000C91000-memory.dmpFilesize
8.6MB
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memory/776-135-0x0000000000000000-mapping.dmp
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memory/932-160-0x0000000000000000-mapping.dmp
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memory/1152-159-0x0000000000000000-mapping.dmp
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memory/1364-145-0x0000000000000000-mapping.dmp
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memory/1912-136-0x0000000000400000-0x0000000000C91000-memory.dmpFilesize
8.6MB
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memory/1912-132-0x0000000002B81000-0x0000000002F6A000-memory.dmpFilesize
3.9MB
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memory/1912-133-0x0000000002F70000-0x00000000037E7000-memory.dmpFilesize
8.5MB
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memory/1912-134-0x0000000000400000-0x0000000000C91000-memory.dmpFilesize
8.6MB
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memory/4204-149-0x0000000000000000-mapping.dmp
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memory/4576-146-0x0000000000000000-mapping.dmp
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memory/4768-154-0x0000000000000000-mapping.dmp
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memory/4768-157-0x0000000000400000-0x0000000000C25000-memory.dmpFilesize
8.1MB
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memory/4768-161-0x0000000000400000-0x0000000000C25000-memory.dmpFilesize
8.1MB
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memory/4768-163-0x0000000000400000-0x0000000000C25000-memory.dmpFilesize
8.1MB
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memory/4928-138-0x0000000000000000-mapping.dmp
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memory/4968-153-0x0000000000400000-0x0000000000C91000-memory.dmpFilesize
8.6MB
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memory/4968-158-0x0000000000400000-0x0000000000C91000-memory.dmpFilesize
8.6MB
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memory/4968-148-0x0000000000400000-0x0000000000C91000-memory.dmpFilesize
8.6MB
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memory/4968-147-0x0000000002E00000-0x00000000031E9000-memory.dmpFilesize
3.9MB
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memory/4968-141-0x0000000000000000-mapping.dmp
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memory/5004-137-0x0000000000000000-mapping.dmp