glupteba | 4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84

Analysis

max time kernel
150s
max time network
150s
platform
windows11-21h2_x64
resource
win11-20240419-en
resource tags

arch:x64arch:x86image:win11-20240419-enlocale:en-usos:windows11-21h2-x64system
submitted
26/04/2024, 15:24

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General

Target
4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe
Size 4.2MB
Sample240426-stf62sed55
SHA256 4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84
MD5 3f3f66f995aec7817cdf6c1480e75281
SHA1 aee0e7b99de9209206d60b0f1c9b50b0714cc345
SHA512 3e4a30698d2ada5680076189af46754584cfdae6fb87a63ddf495e3ed63d61672a9597ccdb2435187518514b4c45eee4362d85ff087734a20d3f7e9b9827d807
SSDEEP 98304:fGzsnCxKltbFvS+Z1vjUEQC5FD5MQIQIIS4sbbL4w:fG4nxAoLumFD5/IIFsr
MD5 SHA1 SHA512 SSDEEP

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 18 IoCs

resource	yara_rule
behavioral2/memory/3336-2-0x0000000006D40000-0x000000000762B000-memory.dmp	family_glupteba
behavioral2/memory/3336-3-0x0000000000400000-0x0000000004420000-memory.dmp	family_glupteba
behavioral2/memory/3336-50-0x0000000000400000-0x0000000004420000-memory.dmp	family_glupteba
behavioral2/memory/3336-51-0x0000000006D40000-0x000000000762B000-memory.dmp	family_glupteba
behavioral2/memory/4760-123-0x0000000000400000-0x0000000004420000-memory.dmp	family_glupteba
behavioral2/memory/2188-150-0x0000000000400000-0x0000000004420000-memory.dmp	family_glupteba
behavioral2/memory/2188-195-0x0000000000400000-0x0000000004420000-memory.dmp	family_glupteba
behavioral2/memory/2188-202-0x0000000000400000-0x0000000004420000-memory.dmp	family_glupteba
behavioral2/memory/2188-203-0x0000000000400000-0x0000000004420000-memory.dmp	family_glupteba
behavioral2/memory/2188-204-0x0000000000400000-0x0000000004420000-memory.dmp	family_glupteba
behavioral2/memory/2188-205-0x0000000000400000-0x0000000004420000-memory.dmp	family_glupteba
behavioral2/memory/2188-206-0x0000000000400000-0x0000000004420000-memory.dmp	family_glupteba
behavioral2/memory/2188-207-0x0000000000400000-0x0000000004420000-memory.dmp	family_glupteba
behavioral2/memory/2188-208-0x0000000000400000-0x0000000004420000-memory.dmp	family_glupteba
behavioral2/memory/2188-209-0x0000000000400000-0x0000000004420000-memory.dmp	family_glupteba
behavioral2/memory/2188-210-0x0000000000400000-0x0000000004420000-memory.dmp	family_glupteba
behavioral2/memory/2188-211-0x0000000000400000-0x0000000004420000-memory.dmp	family_glupteba
behavioral2/memory/2188-212-0x0000000000400000-0x0000000004420000-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
3948	netsh.exe

Executes dropped EXE 2 IoCs

pid	Process
2188	csrss.exe
1412	injector.exe

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-1-5-21-293923083-2364846840-4256557006-1000\Software\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\Windows\\rss\\csrss.exe\""	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-293923083-2364846840-4256557006-1000\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 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

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	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\rss	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe
File created	C:\Windows\rss\csrss.exe	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3144	3336	WerFault.exe	78

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
2028	schtasks.exe
3460	schtasks.exe

Modifies data under HKEY_USERS 64 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-112 = "Eastern Standard Time"	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-42 = "E. South America Standard Time"	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-1892 = "Russia TZ 3 Standard Time"	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-2941 = "Sao Tome Daylight Time"	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\Certificates	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\Certificates	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CTLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\WinTrust\Trust Providers\Software Publishing	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-721 = "Central Pacific Daylight Time"	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\CTLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CRLs	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-571 = "China Daylight Time"	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CRLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\Certificates	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CRLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\Certificates	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-1022 = "Bangladesh Standard Time"	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-592 = "Malay Peninsula Standard Time"	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\Certificates	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-461 = "Afghanistan Daylight Time"	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1"	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\Certificates	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-434 = "Georgian Daylight Time"	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-271 = "Greenwich Daylight Time"	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\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\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-2492 = "Aus Central W. Standard Time"	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-2411 = "Marquesas Daylight Time"	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\WinTrust\Trust Providers\Software Publishing	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\CRLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CTLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CRLs	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-452 = "Caucasus Standard Time"	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-435 = "Georgian Standard Time"	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-211 = "Pacific Daylight Time"	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-292 = "Central European Standard Time"	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-771 = "Montevideo Daylight Time"	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-1861 = "Russia TZ 6 Daylight Time"	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\Certificates	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-661 = "Cen. Australia Daylight Time"	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-364 = "Middle East Daylight Time"	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-2061 = "North Korea Daylight Time"	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-1891 = "Russia TZ 3 Daylight Time"	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CRLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\Certificates	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-2162 = "Altai Standard Time"	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1"	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CTLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CRLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CTLs	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-772 = "Montevideo Standard Time"	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\Certificates	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CRLs	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-182 = "Mountain Standard Time (Mexico)"	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\Certificates	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\CRLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CRLs	powershell.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
3284	powershell.exe
3284	powershell.exe
3336	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe
3336	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe
4416	powershell.exe
4416	powershell.exe
4760	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe
4760	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe
4760	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe
4760	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe
4760	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe
4760	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe
4760	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe
4760	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe
4760	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe
4760	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe
4740	powershell.exe
4740	powershell.exe
2960	powershell.exe
2960	powershell.exe
4720	powershell.exe
4720	powershell.exe
3552	powershell.exe
3552	powershell.exe
652	powershell.exe
652	powershell.exe
1412	injector.exe
1412	injector.exe
1412	injector.exe
1412	injector.exe
1412	injector.exe
1412	injector.exe
2188	csrss.exe
2188	csrss.exe
1412	injector.exe
1412	injector.exe
1412	injector.exe
1412	injector.exe
1412	injector.exe
1412	injector.exe
2188	csrss.exe
2188	csrss.exe
1412	injector.exe
1412	injector.exe
1412	injector.exe
1412	injector.exe
1412	injector.exe
1412	injector.exe
1412	injector.exe
1412	injector.exe
1412	injector.exe
1412	injector.exe
1412	injector.exe
1412	injector.exe
1412	injector.exe
1412	injector.exe
1412	injector.exe
1412	injector.exe
1412	injector.exe
1412	injector.exe
1412	injector.exe
1412	injector.exe
1412	injector.exe
1412	injector.exe

Suspicious use of AdjustPrivilegeToken 10 IoCs

description	pid	Process
Token: SeDebugPrivilege	3284	powershell.exe
Token: SeDebugPrivilege	3336	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe
Token: SeImpersonatePrivilege	3336	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe
Token: SeDebugPrivilege	4416	powershell.exe
Token: SeDebugPrivilege	4740	powershell.exe
Token: SeDebugPrivilege	2960	powershell.exe
Token: SeDebugPrivilege	4720	powershell.exe
Token: SeDebugPrivilege	3552	powershell.exe
Token: SeDebugPrivilege	652	powershell.exe
Token: SeSystemEnvironmentPrivilege	2188	csrss.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 3336 wrote to memory of 3284	3336	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe	80
PID 3336 wrote to memory of 3284	3336	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe	80
PID 3336 wrote to memory of 3284	3336	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe	80
PID 4760 wrote to memory of 4416	4760	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe	89
PID 4760 wrote to memory of 4416	4760	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe	89
PID 4760 wrote to memory of 4416	4760	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe	89
PID 4760 wrote to memory of 2088	4760	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe	91
PID 4760 wrote to memory of 2088	4760	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe	91
PID 2088 wrote to memory of 3948	2088	cmd.exe	93
PID 2088 wrote to memory of 3948	2088	cmd.exe	93
PID 4760 wrote to memory of 4740	4760	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe	94
PID 4760 wrote to memory of 4740	4760	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe	94
PID 4760 wrote to memory of 4740	4760	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe	94
PID 4760 wrote to memory of 2960	4760	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe	96
PID 4760 wrote to memory of 2960	4760	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe	96
PID 4760 wrote to memory of 2960	4760	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe	96
PID 4760 wrote to memory of 2188	4760	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe	98
PID 4760 wrote to memory of 2188	4760	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe	98
PID 4760 wrote to memory of 2188	4760	4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe	98
PID 2188 wrote to memory of 4720	2188	csrss.exe	99
PID 2188 wrote to memory of 4720	2188	csrss.exe	99
PID 2188 wrote to memory of 4720	2188	csrss.exe	99
PID 2188 wrote to memory of 3552	2188	csrss.exe	104
PID 2188 wrote to memory of 3552	2188	csrss.exe	104
PID 2188 wrote to memory of 3552	2188	csrss.exe	104
PID 2188 wrote to memory of 652	2188	csrss.exe	107
PID 2188 wrote to memory of 652	2188	csrss.exe	107
PID 2188 wrote to memory of 652	2188	csrss.exe	107
PID 2188 wrote to memory of 1412	2188	csrss.exe	109
PID 2188 wrote to memory of 1412	2188	csrss.exe	109

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\4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe
"C:\Users\Admin\AppData\Local\Temp\4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3336
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  powershell -nologo -noprofile
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3284
- C:\Users\Admin\AppData\Local\Temp\4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.exe
  "C:\Users\Admin\AppData\Local\Temp\4aff8a59576291865070bd0330d35b35472f438c765c143dc64f10a91ec70b84.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:4760
- - 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:4416
- - 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:2088
  - - 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:3948
- - 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:4740
- - 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:2960
- - C:\Windows\rss\csrss.exe
    C:\Windows\rss\csrss.exe
    3⤵
    - Executes dropped EXE
    - Adds Run key to start application
    - Manipulates WinMonFS driver.
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2188
  - - 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:4720
  - - 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:2028
  - - C:\Windows\SYSTEM32\schtasks.exe
      schtasks /delete /tn ScheduledUpdate /f
      4⤵
      PID:4200
  - - 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:3552
  - - 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:652
  - - 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:1412
  - - 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:3460
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3336 -s 648
  2⤵
  - Program crash
  PID:3144

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3336 -ip 3336
1⤵
PID:1920

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_br4j2mrv.amc.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_br4j2mrv.amc.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 9600b3fdf0565ccb49e21656aa4b24d7c18f776bfd04d9ee984b134707550f02
MD5 d0c46cad6c0778401e21910bd6b56b70
SHA1 7be418951ea96326aca445b8dfe449b2bfa0dca6
SHA512 057531b468f7fbbb2175a696a8aab274dec0d17d9f71df309edcff35e064f3378050066a3df47ccd03048fac461594ec75e3d4fe64f9dd79949d129f51e02949
MD5 SHA1 SHA512

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