glupteba | 5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd

General

Target

5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Size

4.1MB
MD5

582554fb55500ddea2abb1708ae7eee8
SHA1

3139b3bc901a418bc18b2ebc7253123ecc357240
SHA256

5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd
SHA512

25419ea681cbc3efc45ed485b99700096071466e2f7fdd647986ef2669dc740d8e02daec1467557c40a9a7aca97714d1dd1a8e3c780343f351af80c51ed928a1
SSDEEP

98304:oUdwLCQU4shpicxy6jtxBRMATIHJvkKrcghVt:oUudU4micxy6XvCv/Vt

Score

10^/10

glupteba discovery dropper evasion loader persistence rootkit upx

Malware Config

Signatures

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

Glupteba payload 13 IoCs

Processes:

resource	yara_rule
behavioral1/memory/3128-134-0x0000000005140000-0x00000000059B7000-memory.dmp	family_glupteba
behavioral1/memory/3128-135-0x0000000000400000-0x0000000002F4D000-memory.dmp	family_glupteba
behavioral1/memory/2020-141-0x0000000000400000-0x0000000002F4D000-memory.dmp	family_glupteba
behavioral1/memory/1520-148-0x0000000000400000-0x0000000002F4D000-memory.dmp	family_glupteba
behavioral1/memory/1520-149-0x0000000000400000-0x0000000002F4D000-memory.dmp	family_glupteba
behavioral1/memory/1520-150-0x0000000000400000-0x0000000002F4D000-memory.dmp	family_glupteba
behavioral1/memory/1520-151-0x0000000000400000-0x0000000002F4D000-memory.dmp	family_glupteba
behavioral1/memory/1520-152-0x0000000000400000-0x0000000002F4D000-memory.dmp	family_glupteba
behavioral1/memory/1520-153-0x0000000000400000-0x0000000002F4D000-memory.dmp	family_glupteba
behavioral1/memory/1520-154-0x0000000000400000-0x0000000002F4D000-memory.dmp	family_glupteba
behavioral1/memory/1520-155-0x0000000000400000-0x0000000002F4D000-memory.dmp	family_glupteba
behavioral1/memory/1520-156-0x0000000000400000-0x0000000002F4D000-memory.dmp	family_glupteba
behavioral1/memory/1520-163-0x0000000000400000-0x0000000002F4D000-memory.dmp	family_glupteba

Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

1872 netsh.exe
Executes dropped EXE 3 IoCs

Processes:

csrss.exeinjector.exef801950a962ddba14caaa44bf084b55c.exe

pid process

1520 csrss.exe
2584 injector.exe
4184 f801950a962ddba14caaa44bf084b55c.exe

pid	process
1872	netsh.exe

pid	process
1520	csrss.exe
2584	injector.exe
4184	f801950a962ddba14caaa44bf084b55c.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\csrss\f801950a962ddba14caaa44bf084b55c.exe	upx
C:\Users\Admin\AppData\Local\Temp\csrss\f801950a962ddba14caaa44bf084b55c.exe	upx
behavioral1/memory/4184-162-0x0000000000400000-0x0000000000C25000-memory.dmp	upx
behavioral1/memory/4184-164-0x0000000000400000-0x0000000000C25000-memory.dmp	upx
behavioral1/memory/4184-166-0x0000000000400000-0x0000000000C25000-memory.dmp	upx

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.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\""	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.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:

5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe

description ioc process

File opened (read-only) \??\VBoxMiniRdrDN 5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe

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

description	ioc	process
File opened (read-only)	\??\VBoxMiniRdrDN	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe

Drops file in Windows directory 2 IoCs

Processes:

5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe

description	ioc	process
File opened for modification	C:\Windows\rss	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
File created	C:\Windows\rss\csrss.exe	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.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

1072 schtasks.exe
2692 schtasks.exe

pid	process
1072	schtasks.exe
2692	schtasks.exe

Modifies data under HKEY_USERS 64 IoCs

Processes:

5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.execsrss.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-732 = "Fiji Standard Time"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2892 = "Sudan Standard Time"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2141 = "Transbaikal Daylight Time"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2392 = "Aleutian Standard Time"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2532 = "Chatham Islands Standard Time"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-342 = "Egypt Standard Time"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-172 = "Central Standard Time (Mexico)"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-52 = "Greenland Standard Time"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2061 = "North Korea Daylight Time"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-122 = "SA Pacific Standard Time"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-792 = "SA Western Standard Time"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-652 = "AUS Central Standard Time"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-141 = "Canada Central Daylight Time"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-451 = "Caucasus Daylight Time"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-592 = "Malay Peninsula Standard Time"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2592 = "Tocantins Standard Time"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.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,-622 = "Korea Standard Time"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-382 = "South Africa Standard Time"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.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,-222 = "Alaskan Standard Time"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-722 = "Central Pacific Standard Time"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-572 = "China Standard Time"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-334 = "Jordan Daylight Time"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1802 = "Line Islands Standard Time"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2412 = "Marquesas Standard Time"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.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"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-3142 = "South Sudan Standard Time"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-511 = "Central Asia Daylight Time"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2372 = "Easter Island Standard Time"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-231 = "Hawaiian Daylight Time"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2142 = "Transbaikal Standard Time"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CTLs	csrss.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\CTLs	csrss.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-302 = "Romance Standard Time"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2751 = "Tomsk Daylight Time"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2181 = "Astrakhan Daylight Time"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-365 = "Middle East Standard Time"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-182 = "Mountain Standard Time (Mexico)"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-385 = "Namibia Standard Time"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-214 = "Pacific Daylight Time (Mexico)"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-871 = "Pakistan Daylight Time"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-301 = "Romance Daylight Time"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-662 = "Cen. Australia Standard Time"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-432 = "Iran Standard Time"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-772 = "Montevideo Standard Time"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2411 = "Marquesas Daylight Time"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1911 = "Russia TZ 10 Daylight Time"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CTLs	csrss.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-462 = "Afghanistan Standard Time"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1472 = "Magadan Standard Time"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-181 = "Mountain Daylight Time (Mexico)"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2872 = "Magallanes Standard Time"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2771 = "Omsk Daylight Time"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-561 = "SE Asia Daylight Time"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-931 = "Coordinated Universal Time"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-402 = "Arabic Standard Time"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-82 = "Atlantic Standard Time"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-448 = "Azerbaijan Daylight Time"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-632 = "Tokyo Standard Time"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-442 = "Arabian Standard Time"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-721 = "Central Pacific Daylight Time"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2062 = "North Korea Standard Time"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-272 = "Greenwich Standard Time"	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exeinjector.execsrss.exe

pid	process
3128	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
3128	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
2020	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
2020	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
2020	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
2020	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
2020	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
2020	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
2020	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
2020	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
2020	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
2020	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
2584	injector.exe
2584	injector.exe
2584	injector.exe
2584	injector.exe
2584	injector.exe
2584	injector.exe
2584	injector.exe
2584	injector.exe
1520	csrss.exe
1520	csrss.exe
2584	injector.exe
2584	injector.exe
2584	injector.exe
2584	injector.exe
2584	injector.exe
2584	injector.exe
1520	csrss.exe
1520	csrss.exe
2584	injector.exe
2584	injector.exe
2584	injector.exe
2584	injector.exe
2584	injector.exe
2584	injector.exe
2584	injector.exe
2584	injector.exe
2584	injector.exe
2584	injector.exe
2584	injector.exe
2584	injector.exe
2584	injector.exe
2584	injector.exe
2584	injector.exe
2584	injector.exe
2584	injector.exe
2584	injector.exe
2584	injector.exe
2584	injector.exe
2584	injector.exe
2584	injector.exe
2584	injector.exe
2584	injector.exe
2584	injector.exe
2584	injector.exe
2584	injector.exe
2584	injector.exe
2584	injector.exe
2584	injector.exe
2584	injector.exe
2584	injector.exe
2584	injector.exe
2584	injector.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.execsrss.exe

description	pid	process
Token: SeDebugPrivilege	3128	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Token: SeImpersonatePrivilege	3128	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
Token: SeSystemEnvironmentPrivilege	1520	csrss.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.execmd.execsrss.exe

description	pid	process	target process
PID 2020 wrote to memory of 3844	2020	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe	cmd.exe
PID 2020 wrote to memory of 3844	2020	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe	cmd.exe
PID 3844 wrote to memory of 1872	3844	cmd.exe	netsh.exe
PID 3844 wrote to memory of 1872	3844	cmd.exe	netsh.exe
PID 2020 wrote to memory of 1520	2020	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe	csrss.exe
PID 2020 wrote to memory of 1520	2020	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe	csrss.exe
PID 2020 wrote to memory of 1520	2020	5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe	csrss.exe
PID 1520 wrote to memory of 2584	1520	csrss.exe	injector.exe
PID 1520 wrote to memory of 2584	1520	csrss.exe	injector.exe
PID 1520 wrote to memory of 4184	1520	csrss.exe	f801950a962ddba14caaa44bf084b55c.exe
PID 1520 wrote to memory of 4184	1520	csrss.exe	f801950a962ddba14caaa44bf084b55c.exe
PID 1520 wrote to memory of 4184	1520	csrss.exe	f801950a962ddba14caaa44bf084b55c.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\5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
"C:\Users\Admin\AppData\Local\Temp\5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3128

C:\Users\Admin\AppData\Local\Temp\5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.exe
"C:\Users\Admin\AppData\Local\Temp\5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd.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:2020

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:3844

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:1872

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:1520

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:1072

C:\Windows\SYSTEM32\schtasks.exe
schtasks /delete /tn ScheduledUpdate /f
4⤵
PID:2844

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:2584

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:2692

C:\Users\Admin\AppData\Local\Temp\csrss\f801950a962ddba14caaa44bf084b55c.exe
C:\Users\Admin\AppData\Local\Temp\csrss\f801950a962ddba14caaa44bf084b55c.exe
4⤵
- Executes dropped EXE
PID:4184

C:\Windows\SYSTEM32\schtasks.exe
schtasks /delete /tn "csrss" /f
5⤵
PID:4824

C:\Windows\SYSTEM32\schtasks.exe
schtasks /delete /tn "ScheduledUpdate" /f
5⤵
PID:1500

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\csrss\f801950a962ddba14caaa44bf084b55c.exe
Filesize
3.2MB

MD5
f801950a962ddba14caaa44bf084b55c

SHA1
7cadc9076121297428442785536ba0df2d4ae996

SHA256
c3946ec89e15b24b743c46f9acacb58cff47da63f3ce2799d71ed90496b8891f

SHA512
4183bc76bdc84fb779e2e573d9a63d7de47096b63b945f9e335bee95ae28eb208f5ee15f6501ac59623b97c5b77f3455ca313512e7d9803e1704ae22a52459c5

Download Submit
C:\Users\Admin\AppData\Local\Temp\csrss\f801950a962ddba14caaa44bf084b55c.exe
Filesize
3.2MB

MD5
f801950a962ddba14caaa44bf084b55c

SHA1
7cadc9076121297428442785536ba0df2d4ae996

SHA256
c3946ec89e15b24b743c46f9acacb58cff47da63f3ce2799d71ed90496b8891f

SHA512
4183bc76bdc84fb779e2e573d9a63d7de47096b63b945f9e335bee95ae28eb208f5ee15f6501ac59623b97c5b77f3455ca313512e7d9803e1704ae22a52459c5

Download Submit
C:\Users\Admin\AppData\Local\Temp\csrss\injector\NtQuerySystemInformationHook.dll
Filesize
99KB

MD5
09031a062610d77d685c9934318b4170

SHA1
880f744184e7774f3d14c1bb857e21cc7fe89a6d

SHA256
778bd69af403df3c4e074c31b3850d71bf0e64524bea4272a802ca9520b379dd

SHA512
9a276e1f0f55d35f2bf38eb093464f7065bdd30a660e6d1c62eed5e76d1fb2201567b89d9ae65d2d89dc99b142159e36fb73be8d5e08252a975d50544a7cda27

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:\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
582554fb55500ddea2abb1708ae7eee8

SHA1
3139b3bc901a418bc18b2ebc7253123ecc357240

SHA256
5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd

SHA512
25419ea681cbc3efc45ed485b99700096071466e2f7fdd647986ef2669dc740d8e02daec1467557c40a9a7aca97714d1dd1a8e3c780343f351af80c51ed928a1

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

MD5
582554fb55500ddea2abb1708ae7eee8

SHA1
3139b3bc901a418bc18b2ebc7253123ecc357240

SHA256
5b55976b1a94f88bfbf78f342ee1be551f87561a42ece8568dab7e7e61a169bd

SHA512
25419ea681cbc3efc45ed485b99700096071466e2f7fdd647986ef2669dc740d8e02daec1467557c40a9a7aca97714d1dd1a8e3c780343f351af80c51ed928a1

Download Submit
memory/1520-151-0x0000000000400000-0x0000000002F4D000-memory.dmp

Filesize
43.3MB

Download
memory/1520-155-0x0000000000400000-0x0000000002F4D000-memory.dmp

Filesize
43.3MB

Download
memory/1520-150-0x0000000000400000-0x0000000002F4D000-memory.dmp

Filesize
43.3MB

Download
memory/1520-163-0x0000000000400000-0x0000000002F4D000-memory.dmp

Filesize
43.3MB

Download
memory/1520-152-0x0000000000400000-0x0000000002F4D000-memory.dmp

Filesize
43.3MB

Download
memory/1520-153-0x0000000000400000-0x0000000002F4D000-memory.dmp

Filesize
43.3MB

Download
memory/1520-154-0x0000000000400000-0x0000000002F4D000-memory.dmp

Filesize
43.3MB

Download
memory/1520-149-0x0000000000400000-0x0000000002F4D000-memory.dmp

Filesize
43.3MB

Download
memory/1520-156-0x0000000000400000-0x0000000002F4D000-memory.dmp

Filesize
43.3MB

Download
memory/1520-148-0x0000000000400000-0x0000000002F4D000-memory.dmp

Filesize
43.3MB

Download
memory/2020-141-0x0000000000400000-0x0000000002F4D000-memory.dmp

Filesize
43.3MB

Download
memory/3128-134-0x0000000005140000-0x00000000059B7000-memory.dmp

Filesize
8.5MB

Download
memory/3128-135-0x0000000000400000-0x0000000002F4D000-memory.dmp

Filesize
43.3MB

Download
memory/4184-162-0x0000000000400000-0x0000000000C25000-memory.dmp

Filesize
8.1MB

Download
memory/4184-164-0x0000000000400000-0x0000000000C25000-memory.dmp

Filesize
8.1MB

Download
memory/4184-166-0x0000000000400000-0x0000000000C25000-memory.dmp

Filesize
8.1MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads