glupteba | a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565

General

Target

a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Size

4.1MB
MD5

f9c8fea8e579df299c25fcfaed603bb2
SHA1

9f52eb9f994801c77d2941611a754e9ac99dfd00
SHA256

a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565
SHA512

ff89a062d6654fc722e0afe850eb1d2d61a7e359ccf3bf4f173db199fde3a8326b4a1451d35fa7714ad9302f0cace1e078b231bd8038586abb3240e0d3d8c9c8
SSDEEP

98304:Mn7DsKGaqVohMV3iM4rojo/8eRQfWle7+NTITxGbeKkQCvc:83B+EyiMgojz7JTxc/k/vc

Score

10^/10

glupteba discovery dropper evasion loader persistence rootkit

Malware Config

Signatures

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

Glupteba payload 16 IoCs

Processes:

resource	yara_rule
behavioral1/memory/3820-134-0x0000000002F90000-0x0000000003807000-memory.dmp	family_glupteba
behavioral1/memory/3820-135-0x0000000000400000-0x0000000000C91000-memory.dmp	family_glupteba
behavioral1/memory/4572-141-0x0000000000400000-0x0000000000C91000-memory.dmp	family_glupteba
behavioral1/memory/2228-148-0x0000000000400000-0x0000000000C91000-memory.dmp	family_glupteba
behavioral1/memory/2228-149-0x0000000000400000-0x0000000000C91000-memory.dmp	family_glupteba
behavioral1/memory/2228-150-0x0000000000400000-0x0000000000C91000-memory.dmp	family_glupteba
behavioral1/memory/2228-151-0x0000000000400000-0x0000000000C91000-memory.dmp	family_glupteba
behavioral1/memory/2228-152-0x0000000000400000-0x0000000000C91000-memory.dmp	family_glupteba
behavioral1/memory/2228-153-0x0000000000400000-0x0000000000C91000-memory.dmp	family_glupteba
behavioral1/memory/2228-154-0x0000000000400000-0x0000000000C91000-memory.dmp	family_glupteba
behavioral1/memory/2228-155-0x0000000000400000-0x0000000000C91000-memory.dmp	family_glupteba
behavioral1/memory/2228-156-0x0000000000400000-0x0000000000C91000-memory.dmp	family_glupteba
behavioral1/memory/2228-157-0x0000000000400000-0x0000000000C91000-memory.dmp	family_glupteba
behavioral1/memory/2228-158-0x0000000000400000-0x0000000000C91000-memory.dmp	family_glupteba
behavioral1/memory/2228-159-0x0000000000400000-0x0000000000C91000-memory.dmp	family_glupteba
behavioral1/memory/2228-160-0x0000000000400000-0x0000000000C91000-memory.dmp	family_glupteba

Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

4504 netsh.exe
Executes dropped EXE 2 IoCs

Processes:

csrss.exeinjector.exe

pid process

2228 csrss.exe
1552 injector.exe

pid	process
4504	netsh.exe

pid	process
2228	csrss.exe
1552	injector.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

csrss.exea37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\Windows\\rss\\csrss.exe\""	csrss.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\Windows\\rss\\csrss.exe\""	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.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
Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102
Manipulates WinMonFS driver. 1 IoCs
Roottkits write to WinMonFS to hide directories/files from being detected.
rootkit evasion

Processes:

csrss.exe

description ioc process

File opened for modification \??\WinMonFS csrss.exe
Checks for VirtualBox DLLs, possible anti-VM trick 1 TTPs 1 IoCs
Certain files are specific to VirtualBox VMs and can be used to detect execution in a VM.

System Information Discovery
T1082

Processes:

a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe

description ioc process

File opened (read-only) \??\VBoxMiniRdrDN a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe

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

description	ioc	process
File opened (read-only)	\??\VBoxMiniRdrDN	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe

Drops file in Windows directory 2 IoCs

Processes:

a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe

description	ioc	process
File opened for modification	C:\Windows\rss	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
File created	C:\Windows\rss\csrss.exe	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe

Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

1944 4572 WerFault.exe a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.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
T1053

Processes:

schtasks.exeschtasks.exe

pid process

2168 schtasks.exe
3648 schtasks.exe

pid	pid_target	process	target process
1944	4572	WerFault.exe	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe

pid	process
2168	schtasks.exe
3648	schtasks.exe

Modifies data under HKEY_USERS 64 IoCs

Processes:

a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.execsrss.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2161 = "Altai Daylight Time"	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-511 = "Central Asia Daylight Time"	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-282 = "Central Europe Standard Time"	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-602 = "Taipei Standard Time"	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2591 = "Tocantins Daylight Time"	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CTLs	csrss.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-341 = "Egypt Daylight Time"	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1821 = "Russia TZ 1 Daylight Time"	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2941 = "Sao Tome Daylight Time"	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1891 = "Russia TZ 3 Daylight Time"	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2892 = "Sudan Standard Time"	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-401 = "Arabic Daylight Time"	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-142 = "Canada Central Standard Time"	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2411 = "Marquesas Daylight Time"	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-335 = "Jordan Standard Time"	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-771 = "Montevideo Daylight Time"	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-872 = "Pakistan Standard Time"	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1932 = "Russia TZ 11 Standard Time"	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2592 = "Tocantins Standard Time"	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2432 = "Cuba Standard Time"	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1841 = "Russia TZ 4 Daylight Time"	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-362 = "GTB Standard Time"	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2791 = "Novosibirsk Daylight Time"	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-211 = "Pacific Daylight Time"	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-171 = "Central Daylight Time (Mexico)"	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-364 = "Middle East Daylight Time"	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-192 = "Mountain Standard Time"	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-302 = "Romance Standard Time"	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1501 = "Turkey Daylight Time"	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root	csrss.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CRLs	csrss.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CTLs	csrss.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-432 = "Iran Standard Time"	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2631 = "Norfolk Daylight Time"	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1862 = "Russia TZ 6 Standard Time"	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-791 = "SA Western Daylight Time"	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CRLs	csrss.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\Certificates	csrss.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CRLs	csrss.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-662 = "Cen. Australia Standard Time"	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-151 = "Central America Daylight Time"	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-214 = "Pacific Daylight Time (Mexico)"	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-892 = "Morocco Standard Time"	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2792 = "Novosibirsk Standard Time"	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-871 = "Pakistan Daylight Time"	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA	csrss.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-682 = "E. Australia Standard Time"	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-112 = "Eastern Standard Time"	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-731 = "Fiji Daylight Time"	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-832 = "SA Eastern Standard Time"	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-542 = "Myanmar Standard Time"	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-72 = "Newfoundland Standard Time"	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-91 = "Pacific SA Daylight Time"	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-911 = "Mauritius Daylight Time"	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-121 = "SA Pacific Daylight Time"	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2571 = "Turks and Caicos Daylight Time"	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-221 = "Alaskan Daylight Time"	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-452 = "Caucasus Standard Time"	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-371 = "Jerusalem Daylight Time"	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-462 = "Afghanistan Standard Time"	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2612 = "Bougainville Standard Time"	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1871 = "Russia TZ 7 Daylight Time"	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-561 = "SE Asia Daylight Time"	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-572 = "China Standard Time"	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exea37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exeinjector.execsrss.exe

pid	process
3820	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
3820	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
4572	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
4572	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
4572	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
4572	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
4572	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
4572	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
4572	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
4572	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
4572	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
4572	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
1552	injector.exe
1552	injector.exe
1552	injector.exe
1552	injector.exe
1552	injector.exe
1552	injector.exe
2228	csrss.exe
2228	csrss.exe
1552	injector.exe
1552	injector.exe
1552	injector.exe
1552	injector.exe
1552	injector.exe
1552	injector.exe
2228	csrss.exe
2228	csrss.exe
1552	injector.exe
1552	injector.exe
1552	injector.exe
1552	injector.exe
1552	injector.exe
1552	injector.exe
1552	injector.exe
1552	injector.exe
1552	injector.exe
1552	injector.exe
1552	injector.exe
1552	injector.exe
1552	injector.exe
1552	injector.exe
1552	injector.exe
1552	injector.exe
1552	injector.exe
1552	injector.exe
1552	injector.exe
1552	injector.exe
1552	injector.exe
1552	injector.exe
1552	injector.exe
1552	injector.exe
1552	injector.exe
1552	injector.exe
1552	injector.exe
1552	injector.exe
1552	injector.exe
1552	injector.exe
1552	injector.exe
1552	injector.exe
1552	injector.exe
1552	injector.exe
1552	injector.exe
1552	injector.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.execsrss.exe

description	pid	process
Token: SeDebugPrivilege	3820	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Token: SeImpersonatePrivilege	3820	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
Token: SeSystemEnvironmentPrivilege	2228	csrss.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.execmd.execsrss.exe

description	pid	process	target process
PID 4572 wrote to memory of 820	4572	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe	cmd.exe
PID 4572 wrote to memory of 820	4572	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe	cmd.exe
PID 820 wrote to memory of 4504	820	cmd.exe	netsh.exe
PID 820 wrote to memory of 4504	820	cmd.exe	netsh.exe
PID 4572 wrote to memory of 2228	4572	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe	csrss.exe
PID 4572 wrote to memory of 2228	4572	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe	csrss.exe
PID 4572 wrote to memory of 2228	4572	a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe	csrss.exe
PID 2228 wrote to memory of 1552	2228	csrss.exe	injector.exe
PID 2228 wrote to memory of 1552	2228	csrss.exe	injector.exe

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
"C:\Users\Admin\AppData\Local\Temp\a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3820

C:\Users\Admin\AppData\Local\Temp\a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.exe
"C:\Users\Admin\AppData\Local\Temp\a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565.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:4572

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:820

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:4504

C:\Windows\rss\csrss.exe
C:\Windows\rss\csrss.exe
3⤵
- Executes dropped EXE
- Adds Run key to start application
- Manipulates WinMonFS driver.
- Modifies data under HKEY_USERS
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2228

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:2168

C:\Windows\SYSTEM32\schtasks.exe
schtasks /delete /tn ScheduledUpdate /f
4⤵
PID:3752

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:1552

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:3648

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4572 -s 820
3⤵
- Program crash
PID:1944

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 4572 -ip 4572
1⤵
PID:3148

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Modify Existing Service

1

T1031

Registry Run Keys / Startup Folder

1

T1060

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Web Service

1

T1102

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\csrss\injector\injector.exe
Filesize
281KB

MD5
d98e33b66343e7c96158444127a117f6

SHA1
bb716c5509a2bf345c6c1152f6e3e1452d39d50d

SHA256
5de4e2b07a26102fe527606ce5da1d5a4b938967c9d380a3c5fe86e2e34aaaf1

SHA512
705275e4a1ba8205eb799a8cf1737bc8ba686925e52c9198a6060a7abeee65552a85b814ac494a4b975d496a63be285f19a6265550585f2fc85824c42d7efab5

Download Submit
C:\Users\Admin\AppData\Local\Temp\csrss\injector\injector.exe
Filesize
281KB

MD5
d98e33b66343e7c96158444127a117f6

SHA1
bb716c5509a2bf345c6c1152f6e3e1452d39d50d

SHA256
5de4e2b07a26102fe527606ce5da1d5a4b938967c9d380a3c5fe86e2e34aaaf1

SHA512
705275e4a1ba8205eb799a8cf1737bc8ba686925e52c9198a6060a7abeee65552a85b814ac494a4b975d496a63be285f19a6265550585f2fc85824c42d7efab5

Download Submit
C:\Windows\rss\csrss.exe
Filesize
4.1MB

MD5
f9c8fea8e579df299c25fcfaed603bb2

SHA1
9f52eb9f994801c77d2941611a754e9ac99dfd00

SHA256
a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565

SHA512
ff89a062d6654fc722e0afe850eb1d2d61a7e359ccf3bf4f173db199fde3a8326b4a1451d35fa7714ad9302f0cace1e078b231bd8038586abb3240e0d3d8c9c8

Download Submit
C:\Windows\rss\csrss.exe
Filesize
4.1MB

MD5
f9c8fea8e579df299c25fcfaed603bb2

SHA1
9f52eb9f994801c77d2941611a754e9ac99dfd00

SHA256
a37825b304e7b77f3e314430a6718f5094e085ea8f9d209854701ce28e33d565

SHA512
ff89a062d6654fc722e0afe850eb1d2d61a7e359ccf3bf4f173db199fde3a8326b4a1451d35fa7714ad9302f0cace1e078b231bd8038586abb3240e0d3d8c9c8

Download Submit
memory/2228-151-0x0000000000400000-0x0000000000C91000-memory.dmp

Filesize
8.6MB

Download
memory/2228-152-0x0000000000400000-0x0000000000C91000-memory.dmp

Filesize
8.6MB

Download
memory/2228-160-0x0000000000400000-0x0000000000C91000-memory.dmp

Filesize
8.6MB

Download
memory/2228-148-0x0000000000400000-0x0000000000C91000-memory.dmp

Filesize
8.6MB

Download
memory/2228-149-0x0000000000400000-0x0000000000C91000-memory.dmp

Filesize
8.6MB

Download
memory/2228-150-0x0000000000400000-0x0000000000C91000-memory.dmp

Filesize
8.6MB

Download
memory/2228-159-0x0000000000400000-0x0000000000C91000-memory.dmp

Filesize
8.6MB

Download
memory/2228-158-0x0000000000400000-0x0000000000C91000-memory.dmp

Filesize
8.6MB

Download
memory/2228-153-0x0000000000400000-0x0000000000C91000-memory.dmp

Filesize
8.6MB

Download
memory/2228-154-0x0000000000400000-0x0000000000C91000-memory.dmp

Filesize
8.6MB

Download
memory/2228-155-0x0000000000400000-0x0000000000C91000-memory.dmp

Filesize
8.6MB

Download
memory/2228-156-0x0000000000400000-0x0000000000C91000-memory.dmp

Filesize
8.6MB

Download
memory/2228-157-0x0000000000400000-0x0000000000C91000-memory.dmp

Filesize
8.6MB

Download
memory/3820-134-0x0000000002F90000-0x0000000003807000-memory.dmp

Filesize
8.5MB

Download
memory/3820-135-0x0000000000400000-0x0000000000C91000-memory.dmp

Filesize
8.6MB

Download
memory/4572-141-0x0000000000400000-0x0000000000C91000-memory.dmp

Filesize
8.6MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads