glupteba | 4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a

Analysis

max time kernel
149s
max time network
150s
platform
windows11-21h2_x64
resource
win11-20240508-en
resource tags

arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
submitted
19/05/2024, 14:05

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General

Target
4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.exe
Size 4.1MB
Sample240519-rea6tabb48
SHA256 4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a
MD5 d4a08929a094c342b3ecbf39320d8475
SHA1 62bce2778fbb81fe72ab825997770170447567db
SHA512 a1f39943cd15412c5dfa372b6bcecaaba7a42e4a6919a2cec922d663e60381f10ae6bb412294186869e183d585a915f5edd134321658ccdc9759b01503e7bfbb
SSDEEP 98304:IuOdAWE/bfbxbxBimum48oJjLrUZhWcgWy75MTps2CObMUZCzBSj:IuOpIddBi3V8Ojm7gWylM939CW
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/4432-2-0x00000000048B0000-0x000000000519B000-memory.dmp	family_glupteba
behavioral2/memory/4432-3-0x0000000000400000-0x0000000000D1C000-memory.dmp	family_glupteba
behavioral2/memory/4432-106-0x0000000000400000-0x000000000273B000-memory.dmp	family_glupteba
behavioral2/memory/4432-135-0x00000000048B0000-0x000000000519B000-memory.dmp	family_glupteba
behavioral2/memory/2788-134-0x0000000000400000-0x000000000273B000-memory.dmp	family_glupteba
behavioral2/memory/4432-170-0x0000000000400000-0x0000000000D1C000-memory.dmp	family_glupteba
behavioral2/memory/4732-201-0x0000000000400000-0x000000000273B000-memory.dmp	family_glupteba
behavioral2/memory/4732-212-0x0000000000400000-0x000000000273B000-memory.dmp	family_glupteba
behavioral2/memory/4732-215-0x0000000000400000-0x000000000273B000-memory.dmp	family_glupteba
behavioral2/memory/4732-219-0x0000000000400000-0x000000000273B000-memory.dmp	family_glupteba
behavioral2/memory/4732-222-0x0000000000400000-0x000000000273B000-memory.dmp	family_glupteba
behavioral2/memory/4732-228-0x0000000000400000-0x000000000273B000-memory.dmp	family_glupteba
behavioral2/memory/4732-232-0x0000000000400000-0x000000000273B000-memory.dmp	family_glupteba
behavioral2/memory/4732-235-0x0000000000400000-0x000000000273B000-memory.dmp	family_glupteba
behavioral2/memory/4732-238-0x0000000000400000-0x000000000273B000-memory.dmp	family_glupteba
behavioral2/memory/4732-242-0x0000000000400000-0x000000000273B000-memory.dmp	family_glupteba
behavioral2/memory/4732-248-0x0000000000400000-0x000000000273B000-memory.dmp	family_glupteba
behavioral2/memory/4732-251-0x0000000000400000-0x000000000273B000-memory.dmp	family_glupteba
behavioral2/memory/4732-254-0x0000000000400000-0x000000000273B000-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
3024	netsh.exe

Executes dropped EXE 4 IoCs

pid	Process
4732	csrss.exe
4468	injector.exe
2264	windefender.exe
3556	windefender.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000200000002aa20-205.dat	upx
behavioral2/memory/2264-206-0x0000000000400000-0x00000000008DF000-memory.dmp	upx
behavioral2/memory/2264-210-0x0000000000400000-0x00000000008DF000-memory.dmp	upx
behavioral2/memory/3556-216-0x0000000000400000-0x00000000008DF000-memory.dmp	upx
behavioral2/memory/3556-223-0x0000000000400000-0x00000000008DF000-memory.dmp	upx
behavioral2/memory/3556-236-0x0000000000400000-0x00000000008DF000-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-1-5-21-3107365284-1576850094-161165143-1000\Software\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\Windows\\rss\\csrss.exe\""	4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3107365284-1576850094-161165143-1000\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	4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.exe

Drops file in Windows directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Windows\rss	4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.exe
File created	C:\Windows\rss\csrss.exe	4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.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
4560	sc.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 7 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
2540	powershell.exe
1492	powershell.exe
1120	powershell.exe
3512	powershell.exe
1524	powershell.exe
1232	powershell.exe
3884	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
2708	schtasks.exe
4584	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\C:\Windows\system32\,@tzres.dll,-292 = "Central European Standard Time"	4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-121 = "SA Pacific Daylight Time"	4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CRLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\CRLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\Certificates	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CTLs	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,-671 = "AUS Eastern Daylight Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\@tzres.dll,-452 = "Caucasus Standard Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\@tzres.dll,-71 = "Newfoundland Daylight Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\@tzres.dll,-2942 = "Sao Tome Standard Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\@tzres.dll,-2842 = "Saratov Standard Time"	windefender.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\CRLs	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\@tzres.dll,-451 = "Caucasus Daylight Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\@tzres.dll,-335 = "Jordan Standard Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\@tzres.dll,-1871 = "Russia TZ 7 Daylight Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\@tzres.dll,-872 = "Pakistan Standard Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\@tzres.dll,-1832 = "Russia TZ 2 Standard Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\@tzres.dll,-791 = "SA Western Daylight Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-152 = "Central America Standard Time"	4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-385 = "Namibia Standard Time"	4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-1892 = "Russia TZ 3 Standard Time"	4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-632 = "Tokyo Standard Time"	4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CTLs	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-401 = "Arabic Daylight Time"	4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CTLs	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\@tzres.dll,-1892 = "Russia TZ 3 Standard Time"	windefender.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\Certificates	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CTLs	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-141 = "Canada Central Daylight Time"	4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-682 = "E. Australia Standard Time"	4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-272 = "Greenwich Standard Time"	4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-1722 = "Libya Standard Time"	4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1"	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-912 = "Mauritius Standard Time"	4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1"	powershell.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,-1862 = "Russia TZ 6 Standard Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\@tzres.dll,-752 = "Tonga Standard Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-2591 = "Tocantins Daylight Time"	4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CTLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\@tzres.dll,-2751 = "Tomsk Daylight Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\@tzres.dll,-932 = "Coordinated Universal Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-592 = "Malay Peninsula Standard Time"	4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.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	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\@tzres.dll,-1822 = "Russia TZ 1 Standard Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\@tzres.dll,-1891 = "Russia TZ 3 Daylight Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-2532 = "Chatham Islands Standard Time"	4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1"	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CRLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\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,-742 = "New Zealand Standard Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-2531 = "Chatham Islands Daylight Time"	4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-1501 = "Turkey Daylight Time"	4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CTLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CTLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\CTLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CTLs	powershell.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2540	powershell.exe
2540	powershell.exe
4432	4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.exe
4432	4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.exe
1492	powershell.exe
1492	powershell.exe
2788	4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.exe
2788	4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.exe
2788	4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.exe
2788	4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.exe
2788	4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.exe
2788	4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.exe
2788	4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.exe
2788	4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.exe
2788	4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.exe
2788	4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.exe
1120	powershell.exe
1120	powershell.exe
3512	powershell.exe
3512	powershell.exe
1524	powershell.exe
1524	powershell.exe
1232	powershell.exe
1232	powershell.exe
3884	powershell.exe
3884	powershell.exe
4468	injector.exe
4468	injector.exe
4468	injector.exe
4468	injector.exe
4468	injector.exe
4468	injector.exe
4732	csrss.exe
4732	csrss.exe
4468	injector.exe
4468	injector.exe
4468	injector.exe
4468	injector.exe
4468	injector.exe
4468	injector.exe
4732	csrss.exe
4732	csrss.exe
4468	injector.exe
4468	injector.exe
4468	injector.exe
4468	injector.exe
4732	csrss.exe
4732	csrss.exe
4468	injector.exe
4468	injector.exe
4468	injector.exe
4468	injector.exe
4468	injector.exe
4468	injector.exe
4468	injector.exe
4468	injector.exe
4468	injector.exe
4468	injector.exe
4468	injector.exe
4468	injector.exe
4468	injector.exe
4468	injector.exe
4468	injector.exe
4468	injector.exe

Suspicious use of AdjustPrivilegeToken 12 IoCs

description	pid	Process
Token: SeDebugPrivilege	2540	powershell.exe
Token: SeDebugPrivilege	4432	4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.exe
Token: SeImpersonatePrivilege	4432	4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.exe
Token: SeDebugPrivilege	1492	powershell.exe
Token: SeDebugPrivilege	1120	powershell.exe
Token: SeDebugPrivilege	3512	powershell.exe
Token: SeDebugPrivilege	1524	powershell.exe
Token: SeDebugPrivilege	1232	powershell.exe
Token: SeDebugPrivilege	3884	powershell.exe
Token: SeSystemEnvironmentPrivilege	4732	csrss.exe
Token: SeSecurityPrivilege	4560	sc.exe
Token: SeSecurityPrivilege	4560	sc.exe

Suspicious use of WriteProcessMemory 36 IoCs

description	pid	Process	procid_target
PID 4432 wrote to memory of 2540	4432	4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.exe	82
PID 4432 wrote to memory of 2540	4432	4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.exe	82
PID 4432 wrote to memory of 2540	4432	4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.exe	82
PID 2788 wrote to memory of 1492	2788	4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.exe	87
PID 2788 wrote to memory of 1492	2788	4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.exe	87
PID 2788 wrote to memory of 1492	2788	4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.exe	87
PID 2788 wrote to memory of 4992	2788	4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.exe	89
PID 2788 wrote to memory of 4992	2788	4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.exe	89
PID 4992 wrote to memory of 3024	4992	cmd.exe	91
PID 4992 wrote to memory of 3024	4992	cmd.exe	91
PID 2788 wrote to memory of 1120	2788	4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.exe	92
PID 2788 wrote to memory of 1120	2788	4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.exe	92
PID 2788 wrote to memory of 1120	2788	4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.exe	92
PID 2788 wrote to memory of 3512	2788	4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.exe	94
PID 2788 wrote to memory of 3512	2788	4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.exe	94
PID 2788 wrote to memory of 3512	2788	4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.exe	94
PID 2788 wrote to memory of 4732	2788	4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.exe	96
PID 2788 wrote to memory of 4732	2788	4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.exe	96
PID 2788 wrote to memory of 4732	2788	4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.exe	96
PID 4732 wrote to memory of 1524	4732	csrss.exe	97
PID 4732 wrote to memory of 1524	4732	csrss.exe	97
PID 4732 wrote to memory of 1524	4732	csrss.exe	97
PID 4732 wrote to memory of 1232	4732	csrss.exe	102
PID 4732 wrote to memory of 1232	4732	csrss.exe	102
PID 4732 wrote to memory of 1232	4732	csrss.exe	102
PID 4732 wrote to memory of 3884	4732	csrss.exe	105
PID 4732 wrote to memory of 3884	4732	csrss.exe	105
PID 4732 wrote to memory of 3884	4732	csrss.exe	105
PID 4732 wrote to memory of 4468	4732	csrss.exe	107
PID 4732 wrote to memory of 4468	4732	csrss.exe	107
PID 2264 wrote to memory of 2448	2264	windefender.exe	113
PID 2264 wrote to memory of 2448	2264	windefender.exe	113
PID 2264 wrote to memory of 2448	2264	windefender.exe	113
PID 2448 wrote to memory of 4560	2448	cmd.exe	114
PID 2448 wrote to memory of 4560	2448	cmd.exe	114
PID 2448 wrote to memory of 4560	2448	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\4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.exe
"C:\Users\Admin\AppData\Local\Temp\4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4432
- 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:2540
- C:\Users\Admin\AppData\Local\Temp\4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.exe
  "C:\Users\Admin\AppData\Local\Temp\4aa3cb23e42721af2127c709a5bca172151a63161b08992dbc3d98e873e24e1a.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:2788
- - 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:1492
- - 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:4992
  - - 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:3024
- - 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:1120
- - 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:3512
- - 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:4732
  - - 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:1524
  - - 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:2708
  - - C:\Windows\SYSTEM32\schtasks.exe
      schtasks /delete /tn ScheduledUpdate /f
      4⤵
      PID:2108
  - - 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:1232
  - - 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:3884
  - - 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:4468
  - - 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:4584
  - - C:\Windows\windefender.exe
      "C:\Windows\windefender.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of WriteProcessMemory
      PID:2264
    - - 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:2448
      - 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:4560

C:\Windows\windefender.exe
C:\Windows\windefender.exe
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:3556

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_u3f5urx4.5ky.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_u3f5urx4.5ky.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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