glupteba | 99c1c3d791b1224d504c5e4e86aca05acc1cea4f1e3e08d499be8a1df2dcb69e

Analysis

max time kernel
152s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
19/02/2024, 23:48

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General

Target
436064e5e336496f35f667079d9d22d2.exe
Size 4.1MB
Sample240219-3tenbsff7v
SHA256 99c1c3d791b1224d504c5e4e86aca05acc1cea4f1e3e08d499be8a1df2dcb69e
MD5 436064e5e336496f35f667079d9d22d2
SHA1 6327d2d0dd93585cb967bd6b19810068d64931cc
SHA512 6ad10c55b8b7d8adfcbe8db26be6609fd639c775783332128d14b1c720eefe302b17a1f178a426de9df52524aaa9b2bbbc7c9c47a7b0ff7035b35ba928c83e3d
SSDEEP 98304:NO7/lv+pqP7RrejvJBe4lYqk75bNMaJ9bLfF0pRjVS3nNHhnC:NO7/5+oRalB8GKfF0pRRS3nC
MD5 SHA1 SHA512 SSDEEP

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 20 IoCs

resource	yara_rule
behavioral2/memory/588-2-0x0000000003030000-0x000000000391B000-memory.dmp	family_glupteba
behavioral2/memory/588-3-0x0000000000400000-0x0000000000D1C000-memory.dmp	family_glupteba
behavioral2/memory/588-22-0x0000000000400000-0x0000000000D1C000-memory.dmp	family_glupteba
behavioral2/memory/588-31-0x0000000003030000-0x000000000391B000-memory.dmp	family_glupteba
behavioral2/memory/588-50-0x0000000000400000-0x0000000000D1C000-memory.dmp	family_glupteba
behavioral2/memory/800-60-0x0000000003150000-0x0000000003A3B000-memory.dmp	family_glupteba
behavioral2/memory/800-61-0x0000000000400000-0x0000000000D1C000-memory.dmp	family_glupteba
behavioral2/memory/588-75-0x0000000000400000-0x0000000000D1C000-memory.dmp	family_glupteba
behavioral2/memory/800-96-0x0000000000400000-0x0000000000D1C000-memory.dmp	family_glupteba
behavioral2/memory/800-157-0x0000000000400000-0x0000000000D1C000-memory.dmp	family_glupteba
behavioral2/memory/800-160-0x0000000000400000-0x0000000000D1C000-memory.dmp	family_glupteba
behavioral2/memory/3532-226-0x0000000000400000-0x0000000000D1C000-memory.dmp	family_glupteba
behavioral2/memory/3532-261-0x0000000000400000-0x0000000000D1C000-memory.dmp	family_glupteba
behavioral2/memory/3532-271-0x0000000000400000-0x0000000000D1C000-memory.dmp	family_glupteba
behavioral2/memory/3532-274-0x0000000000400000-0x0000000000D1C000-memory.dmp	family_glupteba
behavioral2/memory/3532-277-0x0000000000400000-0x0000000000D1C000-memory.dmp	family_glupteba
behavioral2/memory/3532-280-0x0000000000400000-0x0000000000D1C000-memory.dmp	family_glupteba
behavioral2/memory/3532-282-0x0000000000400000-0x0000000000D1C000-memory.dmp	family_glupteba
behavioral2/memory/3532-285-0x0000000000400000-0x0000000000D1C000-memory.dmp	family_glupteba
behavioral2/memory/3532-289-0x0000000000400000-0x0000000000D1C000-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
1012	netsh.exe

Executes dropped EXE 4 IoCs

pid	Process
3532	csrss.exe
1260	injector.exe
4824	windefender.exe
4200	windefender.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x0003000000021bbf-264.dat	upx
behavioral2/files/0x0003000000021bbf-266.dat	upx
behavioral2/files/0x0003000000021bbf-267.dat	upx
behavioral2/memory/4824-269-0x0000000000400000-0x00000000008DF000-memory.dmp	upx
behavioral2/memory/4200-272-0x0000000000400000-0x00000000008DF000-memory.dmp	upx
behavioral2/memory/4200-278-0x0000000000400000-0x00000000008DF000-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-1-5-21-3073191680-435865314-2862784915-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\Windows\\rss\\csrss.exe\""	436064e5e336496f35f667079d9d22d2.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\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 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 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

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	436064e5e336496f35f667079d9d22d2.exe

Drops file in Windows directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Windows\rss	436064e5e336496f35f667079d9d22d2.exe
File created	C:\Windows\rss\csrss.exe	436064e5e336496f35f667079d9d22d2.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
3376	sc.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
3352	schtasks.exe
2448	schtasks.exe

Modifies data under HKEY_USERS 64 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CRLs	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\22\52C64B7E\@tzres.dll,-391 = "Arab Daylight Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\22\52C64B7E\@tzres.dll,-261 = "GMT Daylight Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\22\52C64B7E\C:\Windows\system32\,@tzres.dll,-12 = "Azores Standard Time"	436064e5e336496f35f667079d9d22d2.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CTLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CTLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\Certificates	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CTLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CTLs	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\22\52C64B7E\@tzres.dll,-1862 = "Russia TZ 6 Standard Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\22\52C64B7E\C:\Windows\system32\,@tzres.dll,-432 = "Iran Standard Time"	436064e5e336496f35f667079d9d22d2.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\22\52C64B7E\C:\Windows\system32\,@tzres.dll,-501 = "Nepal Daylight Time"	436064e5e336496f35f667079d9d22d2.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\Certificates	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\22\52C64B7E\@tzres.dll,-2592 = "Tocantins Standard Time"	windefender.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\Certificates	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\22\52C64B7E\@tzres.dll,-1971 = "Belarus Daylight Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\22\52C64B7E\@tzres.dll,-681 = "E. Australia Daylight Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\22\52C64B7E\C:\Windows\system32\,@tzres.dll,-831 = "SA Eastern Daylight Time"	436064e5e336496f35f667079d9d22d2.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\22\52C64B7E\@tzres.dll,-1661 = "Bahia Daylight Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\22\52C64B7E\@tzres.dll,-561 = "SE Asia Daylight Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\22\52C64B7E\@tzres.dll,-11 = "Azores Daylight Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\22\52C64B7E\@tzres.dll,-31 = "Mid-Atlantic Daylight Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\22\52C64B7E\C:\Windows\system32\,@tzres.dll,-2001 = "Cabo Verde Daylight Time"	436064e5e336496f35f667079d9d22d2.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\22\52C64B7E\C:\Windows\system32\,@tzres.dll,-452 = "Caucasus Standard Time"	436064e5e336496f35f667079d9d22d2.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\22\52C64B7E\C:\Windows\system32\,@tzres.dll,-411 = "E. Africa Daylight Time"	436064e5e336496f35f667079d9d22d2.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CRLs	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\22\52C64B7E\@tzres.dll,-3051 = "Qyzylorda Daylight Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\22\52C64B7E\C:\Windows\system32\,@tzres.dll,-181 = "Mountain Daylight Time (Mexico)"	436064e5e336496f35f667079d9d22d2.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CTLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\22\52C64B7E\@tzres.dll,-402 = "Arabic Standard Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\22\52C64B7E\@tzres.dll,-961 = "Paraguay Daylight Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\22\52C64B7E\@tzres.dll,-2452 = "Saint Pierre Standard Time"	windefender.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\CRLs	powershell.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0"	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\22\52C64B7E\@tzres.dll,-461 = "Afghanistan Daylight Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\22\52C64B7E\@tzres.dll,-42 = "E. South America Standard Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\22\52C64B7E\C:\Windows\system32\,@tzres.dll,-451 = "Caucasus Daylight Time"	436064e5e336496f35f667079d9d22d2.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\Certificates	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\CRLs	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\22\52C64B7E\@tzres.dll,-142 = "Canada Central Standard Time"	windefender.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\WinTrust\Trust Providers\Software Publishing	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\Certificates	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\22\52C64B7E\@tzres.dll,-751 = "Tonga Daylight Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\22\52C64B7E\C:\Windows\system32\,@tzres.dll,-2531 = "Chatham Islands Daylight Time"	436064e5e336496f35f667079d9d22d2.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\22\52C64B7E\C:\Windows\system32\,@tzres.dll,-51 = "Greenland Daylight Time"	436064e5e336496f35f667079d9d22d2.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\22\52C64B7E\C:\Windows\system32\,@tzres.dll,-561 = "SE Asia Daylight Time"	436064e5e336496f35f667079d9d22d2.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\Certificates	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\Certificates	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\22\52C64B7E\@tzres.dll,-365 = "Middle East Standard Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\22\52C64B7E\C:\Windows\system32\,@tzres.dll,-571 = "China Daylight Time"	436064e5e336496f35f667079d9d22d2.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CTLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\22\52C64B7E\@tzres.dll,-982 = "Kamchatka Standard Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\22\52C64B7E\C:\Windows\system32\,@tzres.dll,-2771 = "Omsk Daylight Time"	436064e5e336496f35f667079d9d22d2.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CRLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CTLs	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\22\52C64B7E\@tzres.dll,-151 = "Central America Daylight Time"	windefender.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CTLs	powershell.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1"	powershell.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\IntranetName = "1"	powershell.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
4360	powershell.exe
4360	powershell.exe
588	436064e5e336496f35f667079d9d22d2.exe
588	436064e5e336496f35f667079d9d22d2.exe
2064	powershell.exe
2064	powershell.exe
800	436064e5e336496f35f667079d9d22d2.exe
800	436064e5e336496f35f667079d9d22d2.exe
800	436064e5e336496f35f667079d9d22d2.exe
800	436064e5e336496f35f667079d9d22d2.exe
800	436064e5e336496f35f667079d9d22d2.exe
800	436064e5e336496f35f667079d9d22d2.exe
800	436064e5e336496f35f667079d9d22d2.exe
800	436064e5e336496f35f667079d9d22d2.exe
800	436064e5e336496f35f667079d9d22d2.exe
800	436064e5e336496f35f667079d9d22d2.exe
2204	powershell.exe
2204	powershell.exe
1948	powershell.exe
1948	powershell.exe
1500	powershell.exe
1500	powershell.exe
4268	powershell.exe
4268	powershell.exe
3344	powershell.exe
3344	powershell.exe
1260	injector.exe
1260	injector.exe
1260	injector.exe
1260	injector.exe
1260	injector.exe
1260	injector.exe
1260	injector.exe
1260	injector.exe
3532	csrss.exe
3532	csrss.exe
1260	injector.exe
1260	injector.exe
1260	injector.exe
1260	injector.exe
1260	injector.exe
1260	injector.exe
3532	csrss.exe
3532	csrss.exe
1260	injector.exe
1260	injector.exe
3532	csrss.exe
3532	csrss.exe
1260	injector.exe
1260	injector.exe
1260	injector.exe
1260	injector.exe
1260	injector.exe
1260	injector.exe
1260	injector.exe
1260	injector.exe
1260	injector.exe
1260	injector.exe
1260	injector.exe
1260	injector.exe
1260	injector.exe
1260	injector.exe
1260	injector.exe
1260	injector.exe

Suspicious use of AdjustPrivilegeToken 12 IoCs

description	pid	Process
Token: SeDebugPrivilege	4360	powershell.exe
Token: SeDebugPrivilege	588	436064e5e336496f35f667079d9d22d2.exe
Token: SeImpersonatePrivilege	588	436064e5e336496f35f667079d9d22d2.exe
Token: SeDebugPrivilege	2064	powershell.exe
Token: SeDebugPrivilege	2204	powershell.exe
Token: SeDebugPrivilege	1948	powershell.exe
Token: SeDebugPrivilege	1500	powershell.exe
Token: SeDebugPrivilege	4268	powershell.exe
Token: SeDebugPrivilege	3344	powershell.exe
Token: SeSystemEnvironmentPrivilege	3532	csrss.exe
Token: SeSecurityPrivilege	3376	sc.exe
Token: SeSecurityPrivilege	3376	sc.exe

Suspicious use of WriteProcessMemory 36 IoCs

description	pid	Process	procid_target
PID 588 wrote to memory of 4360	588	436064e5e336496f35f667079d9d22d2.exe	84
PID 588 wrote to memory of 4360	588	436064e5e336496f35f667079d9d22d2.exe	84
PID 588 wrote to memory of 4360	588	436064e5e336496f35f667079d9d22d2.exe	84
PID 800 wrote to memory of 2064	800	436064e5e336496f35f667079d9d22d2.exe	93
PID 800 wrote to memory of 2064	800	436064e5e336496f35f667079d9d22d2.exe	93
PID 800 wrote to memory of 2064	800	436064e5e336496f35f667079d9d22d2.exe	93
PID 800 wrote to memory of 960	800	436064e5e336496f35f667079d9d22d2.exe	97
PID 800 wrote to memory of 960	800	436064e5e336496f35f667079d9d22d2.exe	97
PID 960 wrote to memory of 1012	960	cmd.exe	99
PID 960 wrote to memory of 1012	960	cmd.exe	99
PID 800 wrote to memory of 2204	800	436064e5e336496f35f667079d9d22d2.exe	100
PID 800 wrote to memory of 2204	800	436064e5e336496f35f667079d9d22d2.exe	100
PID 800 wrote to memory of 2204	800	436064e5e336496f35f667079d9d22d2.exe	100
PID 800 wrote to memory of 1948	800	436064e5e336496f35f667079d9d22d2.exe	102
PID 800 wrote to memory of 1948	800	436064e5e336496f35f667079d9d22d2.exe	102
PID 800 wrote to memory of 1948	800	436064e5e336496f35f667079d9d22d2.exe	102
PID 800 wrote to memory of 3532	800	436064e5e336496f35f667079d9d22d2.exe	104
PID 800 wrote to memory of 3532	800	436064e5e336496f35f667079d9d22d2.exe	104
PID 800 wrote to memory of 3532	800	436064e5e336496f35f667079d9d22d2.exe	104
PID 3532 wrote to memory of 1500	3532	csrss.exe	105
PID 3532 wrote to memory of 1500	3532	csrss.exe	105
PID 3532 wrote to memory of 1500	3532	csrss.exe	105
PID 3532 wrote to memory of 4268	3532	csrss.exe	110
PID 3532 wrote to memory of 4268	3532	csrss.exe	110
PID 3532 wrote to memory of 4268	3532	csrss.exe	110
PID 3532 wrote to memory of 3344	3532	csrss.exe	114
PID 3532 wrote to memory of 3344	3532	csrss.exe	114
PID 3532 wrote to memory of 3344	3532	csrss.exe	114
PID 3532 wrote to memory of 1260	3532	csrss.exe	115
PID 3532 wrote to memory of 1260	3532	csrss.exe	115
PID 4824 wrote to memory of 3880	4824	windefender.exe	121
PID 4824 wrote to memory of 3880	4824	windefender.exe	121
PID 4824 wrote to memory of 3880	4824	windefender.exe	121
PID 3880 wrote to memory of 3376	3880	cmd.exe	122
PID 3880 wrote to memory of 3376	3880	cmd.exe	122
PID 3880 wrote to memory of 3376	3880	cmd.exe	122

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\436064e5e336496f35f667079d9d22d2.exe
"C:\Users\Admin\AppData\Local\Temp\436064e5e336496f35f667079d9d22d2.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:588
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  powershell -nologo -noprofile
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4360
- C:\Users\Admin\AppData\Local\Temp\436064e5e336496f35f667079d9d22d2.exe
  "C:\Users\Admin\AppData\Local\Temp\436064e5e336496f35f667079d9d22d2.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:800
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    powershell -nologo -noprofile
    3⤵
    - Drops file in System32 directory
    - Modifies data under HKEY_USERS
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2064
- - 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:960
  - - 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:1012
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    powershell -nologo -noprofile
    3⤵
    - Drops file in System32 directory
    - Modifies data under HKEY_USERS
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2204
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    powershell -nologo -noprofile
    3⤵
    - Drops file in System32 directory
    - Modifies data under HKEY_USERS
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1948
- - 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:3532
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      powershell -nologo -noprofile
      4⤵
      Drops file in System32 directory
      Modifies data under HKEY_USERS
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1500
  - - 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:3352
  - - C:\Windows\SYSTEM32\schtasks.exe
      schtasks /delete /tn ScheduledUpdate /f
      4⤵
      PID:1604
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      powershell -nologo -noprofile
      4⤵
      Drops file in System32 directory
      Modifies data under HKEY_USERS
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:4268
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      powershell -nologo -noprofile
      4⤵
      Drops file in System32 directory
      Modifies data under HKEY_USERS
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:3344
  - - 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:1260
  - - 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:2448
  - - C:\Windows\windefender.exe
      "C:\Windows\windefender.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of WriteProcessMemory
      PID:4824
    - - 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:3880
      - 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:3376

C:\Windows\windefender.exe
C:\Windows\windefender.exe
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:4200

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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_0afnih1n.ae0.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_0afnih1n.ae0.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 92099c10776bb7e3f2a8d1b82d4d40d0c4627e4f1bf754a6e58dfd2c2e97042a
MD5 968cb9309758126772781b83adb8a28f
SHA1 8da30e71accf186b2ba11da1797cf67f8f78b47c
SHA512 4bd50732f8af4d688d95999bddfd296115d7033ddc38f86c9fb1f47fde202bffa27e9088bebcaa3064ca946af2f5c1ca6cbde49d0907f0005c7ab42874515dd3
MD5 SHA1 SHA512

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