glupteba | 5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f

Analysis

max time kernel
150s
max time network
153s
platform
windows11-21h2_x64
resource
win11-20240412-en
resource tags

arch:x64arch:x86image:win11-20240412-enlocale:en-usos:windows11-21h2-x64system
submitted
19/04/2024, 18:03

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General

Target
5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe
Size 4.2MB
Sample240419-wnderacb91
SHA256 5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f
MD5 58633c43f3b196c8d3118a4f91ba3c10
SHA1 feb84dbd879d9060f87813fc3e9a71d34b8edaf3
SHA512 086aa9e488095b0c8cc14785a05837654dfd078ce94d1b8c23402d65dbf90201aac9937cb1df1241cb8d33f08a757235fb0edb26a2bf14a0afafaf0c2dafe4c1
SSDEEP 98304:dBy5JAu+Hk0Et5Mgg8VWlfA2+5+VVv7Fm6fCA:WAu+ENnjVyYiVNw45
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

glupteba discovery dropper evasion loader persistence rootkit upx

Malware Config

Signatures

Glupteba
Glupteba is a modular loader written in Golang with various components.
loader dropper glupteba

Glupteba payload 20 IoCs

resource	yara_rule
behavioral2/memory/3980-2-0x0000000004130000-0x0000000004A1B000-memory.dmp	family_glupteba
behavioral2/memory/3980-3-0x0000000000400000-0x0000000001DFD000-memory.dmp	family_glupteba
behavioral2/memory/3980-49-0x0000000000400000-0x0000000001DFD000-memory.dmp	family_glupteba
behavioral2/memory/1008-52-0x0000000003FD0000-0x00000000048BB000-memory.dmp	family_glupteba
behavioral2/memory/1008-53-0x0000000000400000-0x0000000001DFD000-memory.dmp	family_glupteba
behavioral2/memory/1008-127-0x0000000000400000-0x0000000001DFD000-memory.dmp	family_glupteba
behavioral2/memory/1008-180-0x0000000000400000-0x0000000001DFD000-memory.dmp	family_glupteba
behavioral2/memory/2872-244-0x0000000000400000-0x0000000001DFD000-memory.dmp	family_glupteba
behavioral2/memory/2872-254-0x0000000000400000-0x0000000001DFD000-memory.dmp	family_glupteba
behavioral2/memory/2872-258-0x0000000000400000-0x0000000001DFD000-memory.dmp	family_glupteba
behavioral2/memory/2872-261-0x0000000000400000-0x0000000001DFD000-memory.dmp	family_glupteba
behavioral2/memory/2872-264-0x0000000000400000-0x0000000001DFD000-memory.dmp	family_glupteba
behavioral2/memory/2872-267-0x0000000000400000-0x0000000001DFD000-memory.dmp	family_glupteba
behavioral2/memory/2872-269-0x0000000000400000-0x0000000001DFD000-memory.dmp	family_glupteba
behavioral2/memory/2872-272-0x0000000000400000-0x0000000001DFD000-memory.dmp	family_glupteba
behavioral2/memory/2872-275-0x0000000000400000-0x0000000001DFD000-memory.dmp	family_glupteba
behavioral2/memory/2872-278-0x0000000000400000-0x0000000001DFD000-memory.dmp	family_glupteba
behavioral2/memory/2872-281-0x0000000000400000-0x0000000001DFD000-memory.dmp	family_glupteba
behavioral2/memory/2872-284-0x0000000000400000-0x0000000001DFD000-memory.dmp	family_glupteba
behavioral2/memory/2872-288-0x0000000000400000-0x0000000001DFD000-memory.dmp	family_glupteba

Modifies Windows Firewall 2 TTPs 1 IoCs

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
2544	netsh.exe

Executes dropped EXE 4 IoCs

pid	Process
2872	csrss.exe
2848	injector.exe
3304	windefender.exe
4848	windefender.exe

UPX packed file 4 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/files/0x000300000002a9d8-249.dat	upx
behavioral2/memory/3304-252-0x0000000000400000-0x00000000008DF000-memory.dmp	upx
behavioral2/memory/4848-256-0x0000000000400000-0x00000000008DF000-memory.dmp	upx
behavioral2/memory/4848-262-0x0000000000400000-0x00000000008DF000-memory.dmp	upx

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3777591257-2471171023-3629228286-1000\Software\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\Windows\\rss\\csrss.exe\""	5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3777591257-2471171023-3629228286-1000\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.
discovery

Query Registry
T1012

Manipulates WinMonFS driver. 1 IoCs

Roottkits write to WinMonFS to hide directories/files from being detected.

rootkit evasion

description	ioc	Process
File opened for modification	\??\WinMonFS	csrss.exe

Drops file in System32 directory 7 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-Interactive	powershell.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-Interactive	powershell.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-Interactive	powershell.exe
File created	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-Interactive	powershell.exe
File created	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log	powershell.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-Interactive	powershell.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-Interactive	powershell.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.

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\VBoxMiniRdrDN	5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe

Drops file in Windows directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Windows\rss	5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe
File created	C:\Windows\rss\csrss.exe	5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe
File created	C:\Windows\windefender.exe	csrss.exe
File opened for modification	C:\Windows\windefender.exe	csrss.exe

Launches sc.exe 1 IoCs

Sc.exe is a Windows utlilty to control services on the system.

pid	Process
2444	sc.exe

Creates scheduled task(s) 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
2452	schtasks.exe
3148	schtasks.exe

Modifies data under HKEY_USERS 64 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\@tzres.dll,-2391 = "Aleutian Daylight Time"	windefender.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CRLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\Certificates	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\Certificates	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\@tzres.dll,-411 = "E. Africa Daylight Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\C:\Windows\system32\,@tzres.dll,-842 = "Argentina Standard Time"	5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\C:\Windows\system32\,@tzres.dll,-1661 = "Bahia Daylight Time"	5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\C:\Windows\system32\,@tzres.dll,-722 = "Central Pacific Standard Time"	5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\Certificates	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\C:\Windows\system32\,@tzres.dll,-1412 = "Syria Standard Time"	5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CTLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CTLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\C:\Windows\system32\,@tzres.dll,-2512 = "Lord Howe Standard Time"	5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\WinTrust\Trust Providers\Software Publishing	powershell.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1"	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CTLs	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\C:\Windows\system32\,@tzres.dll,-221 = "Alaskan Daylight Time"	5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\C:\Windows\system32\,@tzres.dll,-2042 = "Eastern Standard Time (Mexico)"	5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CRLs	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\@tzres.dll,-442 = "Arabian Standard Time"	windefender.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CTLs	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\@tzres.dll,-2162 = "Altai Standard Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\@tzres.dll,-691 = "Tasmania Daylight Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\C:\Windows\system32\,@tzres.dll,-212 = "Pacific Standard Time"	5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\Certificates	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\@tzres.dll,-52 = "Greenland Standard Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\@tzres.dll,-272 = "Greenwich Standard Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\C:\Windows\system32\,@tzres.dll,-531 = "Sri Lanka Daylight Time"	5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CRLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CRLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\Certificates	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CRLs	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\@tzres.dll,-142 = "Canada Central Standard Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\C:\Windows\system32\,@tzres.dll,-2491 = "Aus Central W. Daylight Time"	5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\C:\Windows\system32\,@tzres.dll,-512 = "Central Asia Standard Time"	5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\C:\Windows\system32\,@tzres.dll,-2372 = "Easter Island Standard Time"	5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\CTLs	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\@tzres.dll,-232 = "Hawaiian Standard Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\@tzres.dll,-385 = "Namibia Standard Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\@tzres.dll,-241 = "Samoa Daylight Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\@tzres.dll,-201 = "US Mountain Daylight Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\C:\Windows\system32\,@tzres.dll,-2631 = "Norfolk Daylight Time"	5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\C:\Windows\system32\,@tzres.dll,-1931 = "Russia TZ 11 Daylight Time"	5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CTLs	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\@tzres.dll,-672 = "AUS Eastern Standard Time"	windefender.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\Certificates	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\@tzres.dll,-222 = "Alaskan Standard Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\@tzres.dll,-2492 = "Aus Central W. Standard Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\C:\Windows\system32\,@tzres.dll,-2612 = "Bougainville Standard Time"	5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\C:\Windows\system32\,@tzres.dll,-112 = "Eastern Standard Time"	5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\C:\Windows\system32\,@tzres.dll,-202 = "US Mountain Standard Time"	5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\WinTrust\Trust Providers\Software Publishing	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\@tzres.dll,-32 = "Mid-Atlantic Standard Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\@tzres.dll,-212 = "Pacific Standard Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\@tzres.dll,-104 = "Central Brazilian Daylight Time"	windefender.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2004	powershell.exe
2004	powershell.exe
3980	5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe
3980	5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe
776	powershell.exe
776	powershell.exe
1008	5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe
1008	5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe
1008	5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe
1008	5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe
1008	5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe
1008	5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe
1008	5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe
1008	5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe
1008	5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe
1008	5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe
3208	powershell.exe
3208	powershell.exe
4228	powershell.exe
4228	powershell.exe
4472	powershell.exe
4472	powershell.exe
1840	powershell.exe
1840	powershell.exe
1628	powershell.exe
1628	powershell.exe
2848	injector.exe
2848	injector.exe
2848	injector.exe
2848	injector.exe
2848	injector.exe
2848	injector.exe
2872	csrss.exe
2872	csrss.exe
2848	injector.exe
2848	injector.exe
2848	injector.exe
2848	injector.exe
2848	injector.exe
2848	injector.exe
2872	csrss.exe
2872	csrss.exe
2848	injector.exe
2848	injector.exe
2848	injector.exe
2848	injector.exe
2872	csrss.exe
2872	csrss.exe
2848	injector.exe
2848	injector.exe
2848	injector.exe
2848	injector.exe
2848	injector.exe
2848	injector.exe
2848	injector.exe
2848	injector.exe
2848	injector.exe
2848	injector.exe
2848	injector.exe
2848	injector.exe
2848	injector.exe
2848	injector.exe
2848	injector.exe
2848	injector.exe

Suspicious use of AdjustPrivilegeToken 12 IoCs

description	pid	Process
Token: SeDebugPrivilege	2004	powershell.exe
Token: SeDebugPrivilege	3980	5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe
Token: SeImpersonatePrivilege	3980	5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe
Token: SeDebugPrivilege	776	powershell.exe
Token: SeDebugPrivilege	3208	powershell.exe
Token: SeDebugPrivilege	4228	powershell.exe
Token: SeDebugPrivilege	4472	powershell.exe
Token: SeDebugPrivilege	1840	powershell.exe
Token: SeDebugPrivilege	1628	powershell.exe
Token: SeSystemEnvironmentPrivilege	2872	csrss.exe
Token: SeSecurityPrivilege	2444	sc.exe
Token: SeSecurityPrivilege	2444	sc.exe

Suspicious use of WriteProcessMemory 36 IoCs

description	pid	Process	procid_target
PID 3980 wrote to memory of 2004	3980	5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe	82
PID 3980 wrote to memory of 2004	3980	5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe	82
PID 3980 wrote to memory of 2004	3980	5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe	82
PID 1008 wrote to memory of 776	1008	5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe	89
PID 1008 wrote to memory of 776	1008	5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe	89
PID 1008 wrote to memory of 776	1008	5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe	89
PID 1008 wrote to memory of 1588	1008	5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe	91
PID 1008 wrote to memory of 1588	1008	5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe	91
PID 1588 wrote to memory of 2544	1588	cmd.exe	93
PID 1588 wrote to memory of 2544	1588	cmd.exe	93
PID 1008 wrote to memory of 3208	1008	5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe	97
PID 1008 wrote to memory of 3208	1008	5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe	97
PID 1008 wrote to memory of 3208	1008	5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe	97
PID 1008 wrote to memory of 4228	1008	5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe	99
PID 1008 wrote to memory of 4228	1008	5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe	99
PID 1008 wrote to memory of 4228	1008	5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe	99
PID 1008 wrote to memory of 2872	1008	5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe	101
PID 1008 wrote to memory of 2872	1008	5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe	101
PID 1008 wrote to memory of 2872	1008	5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe	101
PID 2872 wrote to memory of 4472	2872	csrss.exe	102
PID 2872 wrote to memory of 4472	2872	csrss.exe	102
PID 2872 wrote to memory of 4472	2872	csrss.exe	102
PID 2872 wrote to memory of 1840	2872	csrss.exe	108
PID 2872 wrote to memory of 1840	2872	csrss.exe	108
PID 2872 wrote to memory of 1840	2872	csrss.exe	108
PID 2872 wrote to memory of 1628	2872	csrss.exe	110
PID 2872 wrote to memory of 1628	2872	csrss.exe	110
PID 2872 wrote to memory of 1628	2872	csrss.exe	110
PID 2872 wrote to memory of 2848	2872	csrss.exe	112
PID 2872 wrote to memory of 2848	2872	csrss.exe	112
PID 3304 wrote to memory of 1164	3304	windefender.exe	118
PID 3304 wrote to memory of 1164	3304	windefender.exe	118
PID 3304 wrote to memory of 1164	3304	windefender.exe	118
PID 1164 wrote to memory of 2444	1164	cmd.exe	119
PID 1164 wrote to memory of 2444	1164	cmd.exe	119
PID 1164 wrote to memory of 2444	1164	cmd.exe	119

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.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe
"C:\Users\Admin\AppData\Local\Temp\5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3980
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  powershell -nologo -noprofile
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2004
- C:\Users\Admin\AppData\Local\Temp\5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe
  "C:\Users\Admin\AppData\Local\Temp\5f8245c2b540890c254323a6d27ad55b244596b8399e6acf7ad9ea7d9fb56c3f.exe"
  2⤵
  - Adds Run key to start application
  - Checks for VirtualBox DLLs, possible anti-VM trick
  - Drops file in Windows directory
  - Modifies data under HKEY_USERS
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1008
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    powershell -nologo -noprofile
    3⤵
    - Drops file in System32 directory
    - Modifies data under HKEY_USERS
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:776
- - C:\Windows\system32\cmd.exe
    C:\Windows\Sysnative\cmd.exe /C "netsh advfirewall firewall add rule name="csrss" dir=in action=allow program="C:\Windows\rss\csrss.exe" enable=yes"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1588
  - - C:\Windows\system32\netsh.exe
      netsh advfirewall firewall add rule name="csrss" dir=in action=allow program="C:\Windows\rss\csrss.exe" enable=yes
      4⤵
      Modifies Windows Firewall
      PID:2544
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    powershell -nologo -noprofile
    3⤵
    - Drops file in System32 directory
    - Modifies data under HKEY_USERS
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3208
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    powershell -nologo -noprofile
    3⤵
    - Drops file in System32 directory
    - Modifies data under HKEY_USERS
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4228
- - C:\Windows\rss\csrss.exe
    C:\Windows\rss\csrss.exe
    3⤵
    - Executes dropped EXE
    - Adds Run key to start application
    - Manipulates WinMonFS driver.
    - Drops file in Windows directory
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2872
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      powershell -nologo -noprofile
      4⤵
      Drops file in System32 directory
      Modifies data under HKEY_USERS
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:4472
  - - C:\Windows\SYSTEM32\schtasks.exe
      schtasks /CREATE /SC ONLOGON /RL HIGHEST /TR "C:\Windows\rss\csrss.exe" /TN csrss /F
      4⤵
      Creates scheduled task(s)
      PID:2452
  - - C:\Windows\SYSTEM32\schtasks.exe
      schtasks /delete /tn ScheduledUpdate /f
      4⤵
      PID:1764
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      powershell -nologo -noprofile
      4⤵
      Drops file in System32 directory
      Modifies data under HKEY_USERS
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1840
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      powershell -nologo -noprofile
      4⤵
      Drops file in System32 directory
      Modifies data under HKEY_USERS
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1628
  - - C:\Users\Admin\AppData\Local\Temp\csrss\injector\injector.exe
      C:\Users\Admin\AppData\Local\Temp\csrss\injector\injector.exe taskmgr.exe C:\Users\Admin\AppData\Local\Temp\csrss\injector\NtQuerySystemInformationHook.dll
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:2848
  - - C:\Windows\SYSTEM32\schtasks.exe
      schtasks /CREATE /SC ONLOGON /RL HIGHEST /TR "C:\Windows\rss\csrss.exe" /TN csrss /F
      4⤵
      Creates scheduled task(s)
      PID:3148
  - - C:\Windows\windefender.exe
      "C:\Windows\windefender.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of WriteProcessMemory
      PID:3304
    - - C:\Windows\SysWOW64\cmd.exe
        
        cmd.exe /C sc sdset WinDefender D:(A;;CCLCSWRPWPDTLOCRRC;;;SY)(A;;CCDCLCSWRPLOCRSDRCWDWO;;;BA)(D;;WPDT;;;BA)(A;;CCLCSWLOCRRC;;;IU)(A;;CCLCSWLOCRRC;;;SU)S:(AU;FA;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;WD)
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:1164
      - C:\Windows\SysWOW64\sc.exe
        
        sc sdset WinDefender D:(A;;CCLCSWRPWPDTLOCRRC;;;SY)(A;;CCDCLCSWRPLOCRSDRCWDWO;;;BA)(D;;WPDT;;;BA)(A;;CCLCSWLOCRRC;;;IU)(A;;CCLCSWLOCRRC;;;SU)S:(AU;FA;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;WD)
        6⤵
        Launches sc.exe
        Suspicious use of AdjustPrivilegeToken
        
        PID:2444

C:\Windows\windefender.exe
C:\Windows\windefender.exe
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:4848

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Scheduled Task/Job

T1053

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Scheduled Task/Job

T1053

Defense Evasion

Impair Defenses

T1562

Disable or Modify System Firewall

T1562.004

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

__PSScriptPolicyTest_c4bdyuyk.yng.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_c4bdyuyk.yng.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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injector.exe

Path C:\Users\Admin\AppData\Local\Temp\csrss\injector\injector.exe
Size 281KB
SHA256 5de4e2b07a26102fe527606ce5da1d5a4b938967c9d380a3c5fe86e2e34aaaf1
MD5 d98e33b66343e7c96158444127a117f6
SHA1 bb716c5509a2bf345c6c1152f6e3e1452d39d50d
SHA512 705275e4a1ba8205eb799a8cf1737bc8ba686925e52c9198a6060a7abeee65552a85b814ac494a4b975d496a63be285f19a6265550585f2fc85824c42d7efab5
SSDEEP 3072:qbHszDaOJ8u2HHFIWr6e29kOnK7qFQ8wMii5I7kGvNjzMuszHshoY46bEydJ+dK9:SA3IlIA6e29vngqS8wMmuooh8z+8F
MD5 SHA1 SHA512 SSDEEP

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powershell.exe.log

Path C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log
Size 2KB
SHA256 e39062a62c3c7617feeeff95ea8a0be51104a0d36f46e44eea22556fda74d8d9
MD5 ac4917a885cf6050b1a483e4bc4d2ea5
SHA1 b1c0a9f27bd21c6bbb8e9be70db8777b4a2a640f
SHA512 092c67a3ecae1d187cad72a8ea1ea37cb78a0cf79c2cd7fb88953e5990669a2e871267015762fd46d274badb88ac0c1d73b00f1df7394d89bed48a3a45c2ba3d
MD5 SHA1 SHA512

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