glupteba | cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600

General

Target

cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
Size

4.1MB
MD5

1554fc689ba3f62bd4a4004cd230e32c
SHA1

fa7e5a84d67881accf89692771da70b598a8df92
SHA256

cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600
SHA512

a96984a0bf31ff3c3874757abc7e9925bf8191a3900b5ccad54051c647047c17d47bba74e81ebbe0d0c3fa17381c19a4dbca9919b7625818367f406146d72596
SSDEEP

98304:+VEC2ltsEMdiZwgSa4s8vEus6m0t0+n/3TQZs:R5lGEMdimjMGmYz/3Ws

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/2912-134-0x00000000050B0000-0x0000000005927000-memory.dmp	family_glupteba
behavioral1/memory/2912-135-0x0000000000400000-0x0000000002F3D000-memory.dmp	family_glupteba
behavioral1/memory/3184-141-0x0000000000400000-0x0000000002F3D000-memory.dmp	family_glupteba
behavioral1/memory/4652-148-0x0000000000400000-0x0000000002F3D000-memory.dmp	family_glupteba
behavioral1/memory/4652-149-0x0000000000400000-0x0000000002F3D000-memory.dmp	family_glupteba
behavioral1/memory/4652-150-0x0000000000400000-0x0000000002F3D000-memory.dmp	family_glupteba
behavioral1/memory/4652-151-0x0000000000400000-0x0000000002F3D000-memory.dmp	family_glupteba
behavioral1/memory/4652-152-0x0000000000400000-0x0000000002F3D000-memory.dmp	family_glupteba
behavioral1/memory/4652-153-0x0000000000400000-0x0000000002F3D000-memory.dmp	family_glupteba
behavioral1/memory/4652-154-0x0000000000400000-0x0000000002F3D000-memory.dmp	family_glupteba
behavioral1/memory/4652-155-0x0000000000400000-0x0000000002F3D000-memory.dmp	family_glupteba
behavioral1/memory/4652-156-0x0000000000400000-0x0000000002F3D000-memory.dmp	family_glupteba
behavioral1/memory/4652-157-0x0000000000400000-0x0000000002F3D000-memory.dmp	family_glupteba
behavioral1/memory/4652-158-0x0000000000400000-0x0000000002F3D000-memory.dmp	family_glupteba
behavioral1/memory/4652-159-0x0000000000400000-0x0000000002F3D000-memory.dmp	family_glupteba
behavioral1/memory/4652-160-0x0000000000400000-0x0000000002F3D000-memory.dmp	family_glupteba

Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

3620 netsh.exe
Executes dropped EXE 2 IoCs

Processes:

csrss.exeinjector.exe

pid process

4652 csrss.exe
1492 injector.exe

pid	process
3620	netsh.exe

pid	process
4652	csrss.exe
1492	injector.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.execsrss.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\""	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\Windows\\rss\\csrss.exe\""	csrss.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
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:

cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe

description ioc process

File opened (read-only) \??\VBoxMiniRdrDN cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe

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

description	ioc	process
File opened (read-only)	\??\VBoxMiniRdrDN	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe

Drops file in Windows directory 2 IoCs

Processes:

cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe

description	ioc	process
File opened for modification	C:\Windows\rss	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
File created	C:\Windows\rss\csrss.exe	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.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

4552 schtasks.exe
2408 schtasks.exe

pid	process
4552	schtasks.exe
2408	schtasks.exe

Modifies data under HKEY_USERS 64 IoCs

Processes:

cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.execsrss.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2182 = "Astrakhan Standard Time"	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-672 = "AUS Eastern Standard Time"	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-361 = "GTB Daylight Time"	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-335 = "Jordan Standard Time"	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2512 = "Lord Howe Standard Time"	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2412 = "Marquesas Standard Time"	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-302 = "Romance Standard Time"	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CRLs	csrss.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root	csrss.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-401 = "Arabic Daylight Time"	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1662 = "Bahia Standard Time"	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-152 = "Central America Standard Time"	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-511 = "Central Asia Daylight Time"	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-162 = "Central Standard Time"	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-932 = "Coordinated Universal Time"	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2391 = "Aleutian Daylight Time"	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-742 = "New Zealand Standard Time"	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-592 = "Malay Peninsula Standard Time"	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-132 = "US Eastern Standard Time"	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\Certificates	csrss.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-661 = "Cen. Australia Daylight Time"	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-232 = "Hawaiian Standard Time"	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.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"	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA	csrss.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\Certificates	csrss.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-671 = "AUS Eastern Daylight Time"	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-911 = "Mauritius Daylight Time"	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-71 = "Newfoundland Daylight Time"	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1861 = "Russia TZ 6 Daylight Time"	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-301 = "Romance Daylight Time"	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1892 = "Russia TZ 3 Standard Time"	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-692 = "Tasmania Standard Time"	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CRLs	csrss.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2371 = "Easter Island Daylight Time"	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople	csrss.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2162 = "Altai Standard Time"	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-931 = "Coordinated Universal Time"	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CRLs	csrss.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-652 = "AUS Central Standard Time"	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-171 = "Central Daylight Time (Mexico)"	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-691 = "Tasmania Daylight Time"	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2142 = "Transbaikal Standard Time"	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-731 = "Fiji Daylight Time"	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-432 = "Iran Standard Time"	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1912 = "Russia TZ 10 Standard Time"	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1931 = "Russia TZ 11 Daylight Time"	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-441 = "Arabian Daylight Time"	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1842 = "Russia TZ 4 Standard Time"	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2791 = "Novosibirsk Daylight Time"	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-381 = "South Africa Daylight Time"	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-434 = "Georgian Daylight Time"	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\CRLs	csrss.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2411 = "Marquesas Daylight Time"	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CRLs	csrss.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-732 = "Fiji Standard Time"	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\Certificates	csrss.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-122 = "SA Pacific Standard Time"	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2592 = "Tocantins Standard Time"	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\CRLs	csrss.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-448 = "Azerbaijan Daylight Time"	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1661 = "Bahia Daylight Time"	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-105 = "Central Brazilian Standard Time"	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-51 = "Greenland Daylight Time"	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-621 = "Korea Daylight Time"	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.execc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exeinjector.execsrss.exe

pid	process
2912	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
2912	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
3184	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
3184	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
3184	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
3184	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
3184	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
3184	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
3184	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
3184	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
3184	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
3184	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
1492	injector.exe
1492	injector.exe
1492	injector.exe
1492	injector.exe
1492	injector.exe
1492	injector.exe
1492	injector.exe
1492	injector.exe
4652	csrss.exe
4652	csrss.exe
1492	injector.exe
1492	injector.exe
1492	injector.exe
1492	injector.exe
1492	injector.exe
1492	injector.exe
4652	csrss.exe
4652	csrss.exe
1492	injector.exe
1492	injector.exe
1492	injector.exe
1492	injector.exe
1492	injector.exe
1492	injector.exe
1492	injector.exe
1492	injector.exe
1492	injector.exe
1492	injector.exe
1492	injector.exe
1492	injector.exe
1492	injector.exe
1492	injector.exe
1492	injector.exe
1492	injector.exe
1492	injector.exe
1492	injector.exe
1492	injector.exe
1492	injector.exe
1492	injector.exe
1492	injector.exe
1492	injector.exe
1492	injector.exe
1492	injector.exe
1492	injector.exe
1492	injector.exe
1492	injector.exe
1492	injector.exe
1492	injector.exe
1492	injector.exe
1492	injector.exe
1492	injector.exe
1492	injector.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.execsrss.exe

description	pid	process
Token: SeDebugPrivilege	2912	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
Token: SeImpersonatePrivilege	2912	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
Token: SeSystemEnvironmentPrivilege	4652	csrss.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.execmd.execsrss.exe

description	pid	process	target process
PID 3184 wrote to memory of 2200	3184	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe	cmd.exe
PID 3184 wrote to memory of 2200	3184	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe	cmd.exe
PID 2200 wrote to memory of 3620	2200	cmd.exe	netsh.exe
PID 2200 wrote to memory of 3620	2200	cmd.exe	netsh.exe
PID 3184 wrote to memory of 4652	3184	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe	csrss.exe
PID 3184 wrote to memory of 4652	3184	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe	csrss.exe
PID 3184 wrote to memory of 4652	3184	cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe	csrss.exe
PID 4652 wrote to memory of 1492	4652	csrss.exe	injector.exe
PID 4652 wrote to memory of 1492	4652	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\cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
"C:\Users\Admin\AppData\Local\Temp\cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2912
- C:\Users\Admin\AppData\Local\Temp\cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.exe
  "C:\Users\Admin\AppData\Local\Temp\cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600.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:3184
- - 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:2200
  - - 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:3620
- - 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:4652
  - - 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:4552
  - - C:\Windows\SYSTEM32\schtasks.exe
      schtasks /delete /tn ScheduledUpdate /f
      4⤵
      PID:4860
  - - 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:1492
  - - 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:2408

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Modify Existing Service

1

T1031

Registry Run Keys / Startup Folder

Scheduled Task

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Modify Registry

Web Service

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

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
1554fc689ba3f62bd4a4004cd230e32c

SHA1
fa7e5a84d67881accf89692771da70b598a8df92

SHA256
cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600

SHA512
a96984a0bf31ff3c3874757abc7e9925bf8191a3900b5ccad54051c647047c17d47bba74e81ebbe0d0c3fa17381c19a4dbca9919b7625818367f406146d72596

Download Submit
C:\Windows\rss\csrss.exe

Filesize
4.1MB

MD5
1554fc689ba3f62bd4a4004cd230e32c

SHA1
fa7e5a84d67881accf89692771da70b598a8df92

SHA256
cc345ca6f238c14e1c847a20b620ced3a30e7485ed5c34d0d6cada08e5843600

SHA512
a96984a0bf31ff3c3874757abc7e9925bf8191a3900b5ccad54051c647047c17d47bba74e81ebbe0d0c3fa17381c19a4dbca9919b7625818367f406146d72596

Download Submit
memory/2912-134-0x00000000050B0000-0x0000000005927000-memory.dmp

Filesize
8.5MB

Download
memory/2912-135-0x0000000000400000-0x0000000002F3D000-memory.dmp

Filesize
43.2MB

Download
memory/3184-141-0x0000000000400000-0x0000000002F3D000-memory.dmp

Filesize
43.2MB

Download
memory/4652-151-0x0000000000400000-0x0000000002F3D000-memory.dmp

Filesize
43.2MB

Download
memory/4652-155-0x0000000000400000-0x0000000002F3D000-memory.dmp

Filesize
43.2MB

Download
memory/4652-150-0x0000000000400000-0x0000000002F3D000-memory.dmp

Filesize
43.2MB

Download
memory/4652-148-0x0000000000400000-0x0000000002F3D000-memory.dmp

Filesize
43.2MB

Download
memory/4652-152-0x0000000000400000-0x0000000002F3D000-memory.dmp

Filesize
43.2MB

Download
memory/4652-153-0x0000000000400000-0x0000000002F3D000-memory.dmp

Filesize
43.2MB

Download
memory/4652-154-0x0000000000400000-0x0000000002F3D000-memory.dmp

Filesize
43.2MB

Download
memory/4652-149-0x0000000000400000-0x0000000002F3D000-memory.dmp

Filesize
43.2MB

Download
memory/4652-156-0x0000000000400000-0x0000000002F3D000-memory.dmp

Filesize
43.2MB

Download
memory/4652-157-0x0000000000400000-0x0000000002F3D000-memory.dmp

Filesize
43.2MB

Download
memory/4652-158-0x0000000000400000-0x0000000002F3D000-memory.dmp

Filesize
43.2MB

Download
memory/4652-159-0x0000000000400000-0x0000000002F3D000-memory.dmp

Filesize
43.2MB

Download
memory/4652-160-0x0000000000400000-0x0000000002F3D000-memory.dmp

Filesize
43.2MB

Download
memory/4652-161-0x0000000000400000-0x0000000002F3D000-memory.dmp

Filesize
43.2MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads