glupteba | 83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913

Analysis

max time kernel
150s
max time network
151s
platform
windows11-21h2_x64
resource
win11-20240426-en
resource tags

arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
submitted
18/05/2024, 08:24

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General

Target
83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe
Size 4.1MB
Sample240518-kaz6tabf33
SHA256 83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913
MD5 43a98cd8ea93fd81c3c9be4b3000f967
SHA1 1c65e8f27a8dc3814003eebbcdce6209c86ac760
SHA512 6216e1d452b7ebd518a9f7c16db6dc728581af443f164e82043102067a00c7d5fd0b8b3c30114a18ad75c127a5abaa27daae0a3f498b1361e399f19a58e9bb18
SSDEEP 98304:AcO3d23DP4WvcTQUVFyLidGODnX7vlp0fAiBu1UOo5GU75c1WMsxJ:AcO3d2wQ4Q8FyLwnXJ+AxvtU75c1jsv
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

glupteba discovery dropper evasion execution loader persistence rootkit upx

Malware Config

Signatures

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

Glupteba payload 19 IoCs

resource	yara_rule
behavioral2/memory/4536-2-0x0000000004CD0000-0x00000000055BB000-memory.dmp	family_glupteba
behavioral2/memory/4536-3-0x0000000000400000-0x0000000000D1C000-memory.dmp	family_glupteba
behavioral2/memory/4536-99-0x0000000004CD0000-0x00000000055BB000-memory.dmp	family_glupteba
behavioral2/memory/4536-97-0x0000000000400000-0x0000000002B08000-memory.dmp	family_glupteba
behavioral2/memory/3844-126-0x0000000000400000-0x0000000002B08000-memory.dmp	family_glupteba
behavioral2/memory/4536-173-0x0000000000400000-0x0000000000D1C000-memory.dmp	family_glupteba
behavioral2/memory/4136-202-0x0000000000400000-0x0000000002B08000-memory.dmp	family_glupteba
behavioral2/memory/4136-213-0x0000000000400000-0x0000000002B08000-memory.dmp	family_glupteba
behavioral2/memory/4136-216-0x0000000000400000-0x0000000002B08000-memory.dmp	family_glupteba
behavioral2/memory/4136-219-0x0000000000400000-0x0000000002B08000-memory.dmp	family_glupteba
behavioral2/memory/4136-222-0x0000000000400000-0x0000000002B08000-memory.dmp	family_glupteba
behavioral2/memory/4136-225-0x0000000000400000-0x0000000002B08000-memory.dmp	family_glupteba
behavioral2/memory/4136-228-0x0000000000400000-0x0000000002B08000-memory.dmp	family_glupteba
behavioral2/memory/4136-231-0x0000000000400000-0x0000000002B08000-memory.dmp	family_glupteba
behavioral2/memory/4136-234-0x0000000000400000-0x0000000002B08000-memory.dmp	family_glupteba
behavioral2/memory/4136-237-0x0000000000400000-0x0000000002B08000-memory.dmp	family_glupteba
behavioral2/memory/4136-240-0x0000000000400000-0x0000000002B08000-memory.dmp	family_glupteba
behavioral2/memory/4136-243-0x0000000000400000-0x0000000002B08000-memory.dmp	family_glupteba
behavioral2/memory/4136-246-0x0000000000400000-0x0000000002B08000-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
3592	netsh.exe

Executes dropped EXE 4 IoCs

pid	Process
4136	csrss.exe
436	injector.exe
3360	windefender.exe
4168	windefender.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000200000002aa1a-205.dat	upx
behavioral2/memory/3360-206-0x0000000000400000-0x00000000008DF000-memory.dmp	upx
behavioral2/memory/3360-211-0x0000000000400000-0x00000000008DF000-memory.dmp	upx
behavioral2/memory/4168-209-0x0000000000400000-0x00000000008DF000-memory.dmp	upx
behavioral2/memory/4168-215-0x0000000000400000-0x00000000008DF000-memory.dmp	upx
behavioral2/memory/4168-220-0x0000000000400000-0x00000000008DF000-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-1-5-21-1230210488-3096403634-4129516247-1000\Software\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\Windows\\rss\\csrss.exe\""	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1230210488-3096403634-4129516247-1000\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 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
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

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	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe

Drops file in Windows directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Windows\rss	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe
File created	C:\Windows\rss\csrss.exe	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.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
4672	sc.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 7 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
4036	powershell.exe
1140	powershell.exe
5076	powershell.exe
1276	powershell.exe
4548	powershell.exe
4808	powershell.exe
4892	powershell.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
3716	schtasks.exe
4732	schtasks.exe

Modifies data under HKEY_USERS 64 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\@tzres.dll,-1412 = "Syria Standard Time"	windefender.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\@tzres.dll,-1662 = "Bahia Standard Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\@tzres.dll,-2042 = "Eastern Standard Time (Mexico)"	windefender.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\Certificates	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\Certificates	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\@tzres.dll,-1972 = "Belarus Standard Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\@tzres.dll,-91 = "Pacific SA Daylight Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-1801 = "Line Islands Daylight Time"	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\Certificates	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\Windows\CurrentVersion\WinTrust\Trust Providers\Software Publishing	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\@tzres.dll,-271 = "Greenwich Daylight Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\@tzres.dll,-511 = "Central Asia Daylight Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-1021 = "Bangladesh Daylight Time"	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-2061 = "North Korea Daylight Time"	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-2752 = "Tomsk Standard Time"	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\CTLs	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\@tzres.dll,-671 = "AUS Eastern Daylight Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-131 = "US Eastern Daylight Time"	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\Certificates	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CTLs	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\@tzres.dll,-1721 = "Libya Daylight Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\@tzres.dll,-212 = "Pacific Standard Time"	windefender.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\@tzres.dll,-832 = "SA Eastern Standard Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\@tzres.dll,-2892 = "Sudan Standard Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-681 = "E. Australia Daylight Time"	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-592 = "Malay Peninsula Standard Time"	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CRLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CTLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-2342 = "Haiti Standard Time"	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-931 = "Coordinated Universal Time"	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\@tzres.dll,-122 = "SA Pacific Standard Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\@tzres.dll,-771 = "Montevideo Daylight Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-82 = "Atlantic Standard Time"	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-2611 = "Bougainville Daylight Time"	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-271 = "Greenwich Daylight Time"	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-1871 = "Russia TZ 7 Daylight Time"	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-2751 = "Tomsk Daylight Time"	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-451 = "Caucasus Daylight Time"	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-531 = "Sri Lanka Daylight Time"	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CRLs	powershell.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0"	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\@tzres.dll,-132 = "US Eastern Standard Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-434 = "Georgian Daylight Time"	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CRLs	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\@tzres.dll,-891 = "Morocco Daylight Time"	windefender.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\Certificates	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-401 = "Arabic Daylight Time"	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-3052 = "Qyzylorda Standard Time"	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-1411 = "Syria Daylight Time"	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\Certificates	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\Certificates	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\@tzres.dll,-385 = "Namibia Standard Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-732 = "Fiji Standard Time"	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-372 = "Jerusalem Standard Time"	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\Certificates	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople	powershell.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
4036	powershell.exe
4036	powershell.exe
4536	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe
4536	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe
1140	powershell.exe
1140	powershell.exe
3844	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe
3844	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe
3844	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe
3844	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe
3844	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe
3844	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe
3844	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe
3844	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe
3844	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe
3844	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe
5076	powershell.exe
5076	powershell.exe
1276	powershell.exe
1276	powershell.exe
4548	powershell.exe
4548	powershell.exe
4808	powershell.exe
4808	powershell.exe
4892	powershell.exe
4892	powershell.exe
436	injector.exe
436	injector.exe
436	injector.exe
436	injector.exe
436	injector.exe
436	injector.exe
4136	csrss.exe
4136	csrss.exe
436	injector.exe
436	injector.exe
436	injector.exe
436	injector.exe
436	injector.exe
436	injector.exe
4136	csrss.exe
4136	csrss.exe
436	injector.exe
436	injector.exe
4136	csrss.exe
4136	csrss.exe
436	injector.exe
436	injector.exe
436	injector.exe
436	injector.exe
436	injector.exe
436	injector.exe
436	injector.exe
436	injector.exe
436	injector.exe
436	injector.exe
436	injector.exe
436	injector.exe
436	injector.exe
436	injector.exe
436	injector.exe
436	injector.exe
436	injector.exe
436	injector.exe

Suspicious use of AdjustPrivilegeToken 12 IoCs

description	pid	Process
Token: SeDebugPrivilege	4036	powershell.exe
Token: SeDebugPrivilege	4536	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe
Token: SeImpersonatePrivilege	4536	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe
Token: SeDebugPrivilege	1140	powershell.exe
Token: SeDebugPrivilege	5076	powershell.exe
Token: SeDebugPrivilege	1276	powershell.exe
Token: SeDebugPrivilege	4548	powershell.exe
Token: SeDebugPrivilege	4808	powershell.exe
Token: SeDebugPrivilege	4892	powershell.exe
Token: SeSystemEnvironmentPrivilege	4136	csrss.exe
Token: SeSecurityPrivilege	4672	sc.exe
Token: SeSecurityPrivilege	4672	sc.exe

Suspicious use of WriteProcessMemory 36 IoCs

description	pid	Process	procid_target
PID 4536 wrote to memory of 4036	4536	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe	82
PID 4536 wrote to memory of 4036	4536	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe	82
PID 4536 wrote to memory of 4036	4536	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe	82
PID 3844 wrote to memory of 1140	3844	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe	87
PID 3844 wrote to memory of 1140	3844	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe	87
PID 3844 wrote to memory of 1140	3844	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe	87
PID 3844 wrote to memory of 4084	3844	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe	89
PID 3844 wrote to memory of 4084	3844	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe	89
PID 4084 wrote to memory of 3592	4084	cmd.exe	91
PID 4084 wrote to memory of 3592	4084	cmd.exe	91
PID 3844 wrote to memory of 5076	3844	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe	92
PID 3844 wrote to memory of 5076	3844	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe	92
PID 3844 wrote to memory of 5076	3844	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe	92
PID 3844 wrote to memory of 1276	3844	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe	94
PID 3844 wrote to memory of 1276	3844	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe	94
PID 3844 wrote to memory of 1276	3844	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe	94
PID 3844 wrote to memory of 4136	3844	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe	96
PID 3844 wrote to memory of 4136	3844	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe	96
PID 3844 wrote to memory of 4136	3844	83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe	96
PID 4136 wrote to memory of 4548	4136	csrss.exe	97
PID 4136 wrote to memory of 4548	4136	csrss.exe	97
PID 4136 wrote to memory of 4548	4136	csrss.exe	97
PID 4136 wrote to memory of 4808	4136	csrss.exe	103
PID 4136 wrote to memory of 4808	4136	csrss.exe	103
PID 4136 wrote to memory of 4808	4136	csrss.exe	103
PID 4136 wrote to memory of 4892	4136	csrss.exe	105
PID 4136 wrote to memory of 4892	4136	csrss.exe	105
PID 4136 wrote to memory of 4892	4136	csrss.exe	105
PID 4136 wrote to memory of 436	4136	csrss.exe	107
PID 4136 wrote to memory of 436	4136	csrss.exe	107
PID 3360 wrote to memory of 4148	3360	windefender.exe	113
PID 3360 wrote to memory of 4148	3360	windefender.exe	113
PID 3360 wrote to memory of 4148	3360	windefender.exe	113
PID 4148 wrote to memory of 4672	4148	cmd.exe	114
PID 4148 wrote to memory of 4672	4148	cmd.exe	114
PID 4148 wrote to memory of 4672	4148	cmd.exe	114

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\83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe
"C:\Users\Admin\AppData\Local\Temp\83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4536
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  powershell -nologo -noprofile
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4036
- C:\Users\Admin\AppData\Local\Temp\83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.exe
  "C:\Users\Admin\AppData\Local\Temp\83b0cefe0ad3b43f8bbd2f4ba11f7fec1d9d26d788ed6162d61321023d873913.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:3844
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    powershell -nologo -noprofile
    3⤵
    - Drops file in System32 directory
    - Command and Scripting Interpreter: PowerShell
    - Modifies data under HKEY_USERS
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1140
- - 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:4084
  - - 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:3592
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    powershell -nologo -noprofile
    3⤵
    - Drops file in System32 directory
    - Command and Scripting Interpreter: PowerShell
    - Modifies data under HKEY_USERS
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:5076
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    powershell -nologo -noprofile
    3⤵
    - Drops file in System32 directory
    - Command and Scripting Interpreter: PowerShell
    - Modifies data under HKEY_USERS
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1276
- - 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:4136
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      powershell -nologo -noprofile
      4⤵
      Drops file in System32 directory
      Command and Scripting Interpreter: PowerShell
      Modifies data under HKEY_USERS
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:4548
  - - 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:3716
  - - C:\Windows\SYSTEM32\schtasks.exe
      schtasks /delete /tn ScheduledUpdate /f
      4⤵
      PID:1408
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      powershell -nologo -noprofile
      4⤵
      Drops file in System32 directory
      Command and Scripting Interpreter: PowerShell
      Modifies data under HKEY_USERS
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:4808
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      powershell -nologo -noprofile
      4⤵
      Drops file in System32 directory
      Command and Scripting Interpreter: PowerShell
      Modifies data under HKEY_USERS
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:4892
  - - 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:436
  - - 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:4732
  - - C:\Windows\windefender.exe
      "C:\Windows\windefender.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of WriteProcessMemory
      PID:3360
    - - 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:4148
      - 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:4672

C:\Windows\windefender.exe
C:\Windows\windefender.exe
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:4168

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

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_n5do35wk.fzz.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_n5do35wk.fzz.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 9600b3fdf0565ccb49e21656aa4b24d7c18f776bfd04d9ee984b134707550f02
MD5 d0c46cad6c0778401e21910bd6b56b70
SHA1 7be418951ea96326aca445b8dfe449b2bfa0dca6
SHA512 057531b468f7fbbb2175a696a8aab274dec0d17d9f71df309edcff35e064f3378050066a3df47ccd03048fac461594ec75e3d4fe64f9dd79949d129f51e02949
MD5 SHA1 SHA512

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