Analysis
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max time kernel
150s -
max time network
146s -
platform
windows10-2004_x64 -
resource
win10v2004-20230220-en -
resource tags
arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system -
submitted
21-02-2023 16:37
Static task
static1
General
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Target
dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe
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Size
4.0MB
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MD5
e3357c8791588d8029b6b33dd1900e58
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SHA1
b6d2215cb723bda5fa4db890e9f060ceca91e837
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SHA256
dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b
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SHA512
2a3190f38a5108c6839bf3b8bb16aee2f43a952540537cf6711b83dbe44e685b80c91a4fae2b99f86f5ad8a2b12e2be0937b013f1145f535591c1881081bd929
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SSDEEP
98304:tfVSxIPdgd8feRQZUKSroRj6k6LDLp1LM6A:tfIxQ2ufeR//rXkIh1LM6A
Malware Config
Signatures
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Glupteba payload 16 IoCs
Processes:
resource yara_rule behavioral1/memory/2684-134-0x0000000002DC0000-0x0000000003637000-memory.dmp family_glupteba behavioral1/memory/2684-135-0x0000000000400000-0x0000000000C91000-memory.dmp family_glupteba behavioral1/memory/4164-141-0x0000000000400000-0x0000000000C91000-memory.dmp family_glupteba behavioral1/memory/544-148-0x0000000000400000-0x0000000000C91000-memory.dmp family_glupteba behavioral1/memory/544-149-0x0000000000400000-0x0000000000C91000-memory.dmp family_glupteba behavioral1/memory/544-150-0x0000000000400000-0x0000000000C91000-memory.dmp family_glupteba behavioral1/memory/544-151-0x0000000000400000-0x0000000000C91000-memory.dmp family_glupteba behavioral1/memory/544-152-0x0000000000400000-0x0000000000C91000-memory.dmp family_glupteba behavioral1/memory/544-153-0x0000000000400000-0x0000000000C91000-memory.dmp family_glupteba behavioral1/memory/544-154-0x0000000000400000-0x0000000000C91000-memory.dmp family_glupteba behavioral1/memory/544-155-0x0000000000400000-0x0000000000C91000-memory.dmp family_glupteba behavioral1/memory/544-156-0x0000000000400000-0x0000000000C91000-memory.dmp family_glupteba behavioral1/memory/544-157-0x0000000000400000-0x0000000000C91000-memory.dmp family_glupteba behavioral1/memory/544-158-0x0000000000400000-0x0000000000C91000-memory.dmp family_glupteba behavioral1/memory/544-159-0x0000000000400000-0x0000000000C91000-memory.dmp family_glupteba behavioral1/memory/544-160-0x0000000000400000-0x0000000000C91000-memory.dmp family_glupteba -
Modifies Windows Firewall 1 TTPs 1 IoCs
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Executes dropped EXE 2 IoCs
Processes:
csrss.exeinjector.exepid process 544 csrss.exe 2356 injector.exe -
Adds Run key to start application 2 TTPs 2 IoCs
Processes:
dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.execsrss.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\Windows\\rss\\csrss.exe\"" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe Set value (str) \REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\Windows\\rss\\csrss.exe\"" csrss.exe -
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
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Legitimate hosting services abused for malware hosting/C2 1 TTPs
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Manipulates WinMonFS driver. 1 IoCs
Roottkits write to WinMonFS to hide directories/files from being detected.
Processes:
csrss.exedescription ioc process File opened for modification \??\WinMonFS csrss.exe -
Checks for VirtualBox DLLs, possible anti-VM trick 1 TTPs 1 IoCs
Certain files are specific to VirtualBox VMs and can be used to detect execution in a VM.
Processes:
dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exedescription ioc process File opened (read-only) \??\VBoxMiniRdrDN dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe -
Drops file in Windows directory 2 IoCs
Processes:
dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exedescription ioc process File created C:\Windows\rss\csrss.exe dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe File opened for modification C:\Windows\rss dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.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 3572 schtasks.exe 1168 schtasks.exe -
Modifies data under HKEY_USERS 64 IoCs
Processes:
dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.execsrss.exedescription ioc process Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-911 = "Mauritius Daylight Time" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2062 = "North Korea Standard Time" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CRLs csrss.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-392 = "Arab Standard Time" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CTLs csrss.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-132 = "US Eastern Standard Time" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-262 = "GMT Standard Time" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-282 = "Central Europe Standard Time" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-541 = "Myanmar Daylight Time" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-592 = "Malay Peninsula Standard Time" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-448 = "Azerbaijan Daylight Time" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-384 = "Namibia Daylight Time" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2632 = "Norfolk Standard Time" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-432 = "Iran Standard Time" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-681 = "E. Australia Daylight Time" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2772 = "Omsk Standard Time" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\Certificates csrss.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-442 = "Arabian Standard Time" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-141 = "Canada Central Daylight Time" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-722 = "Central Pacific Standard Time" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-431 = "Iran Daylight Time" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-961 = "Paraguay Daylight Time" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-562 = "SE Asia Standard Time" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-82 = "Atlantic Standard Time" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-402 = "Arabic Standard Time" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-362 = "GTB Standard Time" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-301 = "Romance Daylight Time" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-121 = "SA Pacific Daylight Time" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2842 = "Saratov Standard Time" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-461 = "Afghanistan Daylight Time" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2491 = "Aus Central W. Daylight Time" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-151 = "Central America Daylight Time" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-892 = "Morocco Standard Time" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-215 = "Pacific Standard Time (Mexico)" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\Certificates csrss.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,-2391 = "Aleutian Daylight Time" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1471 = "Magadan Daylight Time" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2451 = "Saint Pierre Daylight Time" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2141 = "Transbaikal Daylight Time" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1042 = "Ulaanbaatar Standard Time" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-292 = "Central European Standard Time" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-741 = "New Zealand Daylight Time" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1862 = "Russia TZ 6 Standard Time" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-912 = "Mauritius Standard Time" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1822 = "Russia TZ 1 Standard Time" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1721 = "Libya Daylight Time" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.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,-512 = "Central Asia Standard Time" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2511 = "Lord Howe Daylight Time" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CTLs csrss.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1801 = "Line Islands Daylight Time" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.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" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-381 = "South Africa Daylight Time" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-542 = "Myanmar Standard Time" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-391 = "Arab Daylight Time" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-162 = "Central Standard Time" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-51 = "Greenland Daylight Time" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-232 = "Hawaiian Standard Time" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.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" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-791 = "SA Western Daylight Time" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2591 = "Tocantins Daylight Time" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-221 = "Alaskan Daylight Time" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-202 = "US Mountain Standard Time" dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe -
Suspicious behavior: EnumeratesProcesses 64 IoCs
Processes:
dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exedbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exeinjector.execsrss.exepid process 2684 dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe 2684 dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe 4164 dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe 4164 dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe 4164 dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe 4164 dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe 4164 dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe 4164 dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe 4164 dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe 4164 dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe 4164 dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe 4164 dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe 2356 injector.exe 2356 injector.exe 2356 injector.exe 2356 injector.exe 2356 injector.exe 2356 injector.exe 2356 injector.exe 2356 injector.exe 544 csrss.exe 544 csrss.exe 2356 injector.exe 2356 injector.exe 2356 injector.exe 2356 injector.exe 2356 injector.exe 2356 injector.exe 544 csrss.exe 544 csrss.exe 2356 injector.exe 2356 injector.exe 2356 injector.exe 2356 injector.exe 2356 injector.exe 2356 injector.exe 2356 injector.exe 2356 injector.exe 2356 injector.exe 2356 injector.exe 2356 injector.exe 2356 injector.exe 2356 injector.exe 2356 injector.exe 2356 injector.exe 2356 injector.exe 2356 injector.exe 2356 injector.exe 2356 injector.exe 2356 injector.exe 2356 injector.exe 2356 injector.exe 2356 injector.exe 2356 injector.exe 2356 injector.exe 2356 injector.exe 2356 injector.exe 2356 injector.exe 2356 injector.exe 2356 injector.exe 2356 injector.exe 2356 injector.exe 2356 injector.exe 2356 injector.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
Processes:
dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.execsrss.exedescription pid process Token: SeDebugPrivilege 2684 dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe Token: SeImpersonatePrivilege 2684 dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe Token: SeSystemEnvironmentPrivilege 544 csrss.exe -
Suspicious use of WriteProcessMemory 9 IoCs
Processes:
dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.execmd.execsrss.exedescription pid process target process PID 4164 wrote to memory of 1048 4164 dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe cmd.exe PID 4164 wrote to memory of 1048 4164 dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe cmd.exe PID 1048 wrote to memory of 4648 1048 cmd.exe netsh.exe PID 1048 wrote to memory of 4648 1048 cmd.exe netsh.exe PID 4164 wrote to memory of 544 4164 dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe csrss.exe PID 4164 wrote to memory of 544 4164 dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe csrss.exe PID 4164 wrote to memory of 544 4164 dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe csrss.exe PID 544 wrote to memory of 2356 544 csrss.exe injector.exe PID 544 wrote to memory of 2356 544 csrss.exe injector.exe -
Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
Processes
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C:\Users\Admin\AppData\Local\Temp\dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe"C:\Users\Admin\AppData\Local\Temp\dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe"1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Users\Admin\AppData\Local\Temp\dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe"C:\Users\Admin\AppData\Local\Temp\dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b.exe"2⤵
- Adds Run key to start application
- Checks for VirtualBox DLLs, possible anti-VM trick
- Drops file in Windows directory
- Modifies data under HKEY_USERS
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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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
- Manipulates WinMonFS driver.
- 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)
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
MD5e3357c8791588d8029b6b33dd1900e58
SHA1b6d2215cb723bda5fa4db890e9f060ceca91e837
SHA256dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b
SHA5122a3190f38a5108c6839bf3b8bb16aee2f43a952540537cf6711b83dbe44e685b80c91a4fae2b99f86f5ad8a2b12e2be0937b013f1145f535591c1881081bd929
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C:\Windows\rss\csrss.exeFilesize
4.0MB
MD5e3357c8791588d8029b6b33dd1900e58
SHA1b6d2215cb723bda5fa4db890e9f060ceca91e837
SHA256dbd4cf3a7e8ceb4be47b316e889fd48d7bca2d15c8f1dfc181c5d9a60753f97b
SHA5122a3190f38a5108c6839bf3b8bb16aee2f43a952540537cf6711b83dbe44e685b80c91a4fae2b99f86f5ad8a2b12e2be0937b013f1145f535591c1881081bd929
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memory/544-151-0x0000000000400000-0x0000000000C91000-memory.dmpFilesize
8.6MB
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memory/544-152-0x0000000000400000-0x0000000000C91000-memory.dmpFilesize
8.6MB
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memory/544-160-0x0000000000400000-0x0000000000C91000-memory.dmpFilesize
8.6MB
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memory/544-148-0x0000000000400000-0x0000000000C91000-memory.dmpFilesize
8.6MB
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memory/544-149-0x0000000000400000-0x0000000000C91000-memory.dmpFilesize
8.6MB
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memory/544-150-0x0000000000400000-0x0000000000C91000-memory.dmpFilesize
8.6MB
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memory/544-159-0x0000000000400000-0x0000000000C91000-memory.dmpFilesize
8.6MB
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memory/544-158-0x0000000000400000-0x0000000000C91000-memory.dmpFilesize
8.6MB
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memory/544-153-0x0000000000400000-0x0000000000C91000-memory.dmpFilesize
8.6MB
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memory/544-154-0x0000000000400000-0x0000000000C91000-memory.dmpFilesize
8.6MB
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memory/544-155-0x0000000000400000-0x0000000000C91000-memory.dmpFilesize
8.6MB
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memory/544-156-0x0000000000400000-0x0000000000C91000-memory.dmpFilesize
8.6MB
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memory/544-157-0x0000000000400000-0x0000000000C91000-memory.dmpFilesize
8.6MB
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memory/2684-134-0x0000000002DC0000-0x0000000003637000-memory.dmpFilesize
8.5MB
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memory/2684-135-0x0000000000400000-0x0000000000C91000-memory.dmpFilesize
8.6MB
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memory/4164-141-0x0000000000400000-0x0000000000C91000-memory.dmpFilesize
8.6MB