servhelper | ee5d82cd5e61b518572b4415797ee407cff1d28a2e0b43a2baec7236c37695eb

Analysis

max time kernel
95s
max time network
120s
platform
windows10_x64
resource
win10-en-20210920
submitted
10/10/2021, 11:58

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General

Target

cb3cc551561883ab8fc4fb6fc837a469.exe
Size

4.0MB
MD5

cb3cc551561883ab8fc4fb6fc837a469
SHA1

f74ae6d243342099d3fa500cbc630f4a244a8d82
SHA256

ee5d82cd5e61b518572b4415797ee407cff1d28a2e0b43a2baec7236c37695eb
SHA512

b97782f7835949ec41da357cfba598936bc2542fa53c0c8da7f35168f4f0fe19158a5946a297dcc540b7ce0dda8aeacd06f69ac209bd562e58fb31924e8fd7d1

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 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
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

Modifies registry key 1 TTPs 1 IoCs

Modify Registry

T1112

pid	Process
3632	reg.exe

Runs net.exe

Suspicious behavior: EnumeratesProcesses 15 IoCs

pid	Process
1572	powershell.exe
1572	powershell.exe
1572	powershell.exe
3424	powershell.exe
3424	powershell.exe
3424	powershell.exe
1600	powershell.exe
1600	powershell.exe
1600	powershell.exe
4052	powershell.exe
4052	powershell.exe
4052	powershell.exe
1572	powershell.exe
1572	powershell.exe
1572	powershell.exe

Suspicious behavior: LoadsDriver 1 IoCs

pid	Process
640	Process not Found

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	1572	powershell.exe
Token: SeDebugPrivilege	3424	powershell.exe
Token: SeDebugPrivilege	1600	powershell.exe
Token: SeDebugPrivilege	4052	powershell.exe

Suspicious use of WriteProcessMemory 63 IoCs

description	pid	Process	procid_target
PID 2524 wrote to memory of 1572	2524	cb3cc551561883ab8fc4fb6fc837a469.exe	72
PID 2524 wrote to memory of 1572	2524	cb3cc551561883ab8fc4fb6fc837a469.exe	72
PID 2524 wrote to memory of 1572	2524	cb3cc551561883ab8fc4fb6fc837a469.exe	72
PID 1572 wrote to memory of 1072	1572	powershell.exe	74
PID 1572 wrote to memory of 1072	1572	powershell.exe	74
PID 1572 wrote to memory of 1072	1572	powershell.exe	74
PID 1072 wrote to memory of 1144	1072	csc.exe	75
PID 1072 wrote to memory of 1144	1072	csc.exe	75
PID 1072 wrote to memory of 1144	1072	csc.exe	75
PID 1572 wrote to memory of 3424	1572	powershell.exe	76
PID 1572 wrote to memory of 3424	1572	powershell.exe	76
PID 1572 wrote to memory of 3424	1572	powershell.exe	76
PID 1572 wrote to memory of 1600	1572	powershell.exe	78
PID 1572 wrote to memory of 1600	1572	powershell.exe	78
PID 1572 wrote to memory of 1600	1572	powershell.exe	78
PID 1572 wrote to memory of 4052	1572	powershell.exe	80
PID 1572 wrote to memory of 4052	1572	powershell.exe	80
PID 1572 wrote to memory of 4052	1572	powershell.exe	80
PID 1572 wrote to memory of 1548	1572	powershell.exe	82
PID 1572 wrote to memory of 1548	1572	powershell.exe	82
PID 1572 wrote to memory of 1548	1572	powershell.exe	82
PID 1572 wrote to memory of 3632	1572	powershell.exe	83
PID 1572 wrote to memory of 3632	1572	powershell.exe	83
PID 1572 wrote to memory of 3632	1572	powershell.exe	83
PID 1572 wrote to memory of 3200	1572	powershell.exe	84
PID 1572 wrote to memory of 3200	1572	powershell.exe	84
PID 1572 wrote to memory of 3200	1572	powershell.exe	84
PID 1572 wrote to memory of 408	1572	powershell.exe	85
PID 1572 wrote to memory of 408	1572	powershell.exe	85
PID 1572 wrote to memory of 408	1572	powershell.exe	85
PID 408 wrote to memory of 2488	408	net.exe	86
PID 408 wrote to memory of 2488	408	net.exe	86
PID 408 wrote to memory of 2488	408	net.exe	86
PID 1572 wrote to memory of 3312	1572	powershell.exe	87
PID 1572 wrote to memory of 3312	1572	powershell.exe	87
PID 1572 wrote to memory of 3312	1572	powershell.exe	87
PID 3312 wrote to memory of 2344	3312	cmd.exe	88
PID 3312 wrote to memory of 2344	3312	cmd.exe	88
PID 3312 wrote to memory of 2344	3312	cmd.exe	88
PID 2344 wrote to memory of 1756	2344	cmd.exe	89
PID 2344 wrote to memory of 1756	2344	cmd.exe	89
PID 2344 wrote to memory of 1756	2344	cmd.exe	89
PID 1756 wrote to memory of 2328	1756	net.exe	90
PID 1756 wrote to memory of 2328	1756	net.exe	90
PID 1756 wrote to memory of 2328	1756	net.exe	90
PID 1572 wrote to memory of 1744	1572	powershell.exe	91
PID 1572 wrote to memory of 1744	1572	powershell.exe	91
PID 1572 wrote to memory of 1744	1572	powershell.exe	91
PID 1744 wrote to memory of 2000	1744	cmd.exe	92
PID 1744 wrote to memory of 2000	1744	cmd.exe	92
PID 1744 wrote to memory of 2000	1744	cmd.exe	92
PID 2000 wrote to memory of 4020	2000	cmd.exe	93
PID 2000 wrote to memory of 4020	2000	cmd.exe	93
PID 2000 wrote to memory of 4020	2000	cmd.exe	93
PID 4020 wrote to memory of 1936	4020	net.exe	94
PID 4020 wrote to memory of 1936	4020	net.exe	94
PID 4020 wrote to memory of 1936	4020	net.exe	94
PID 1572 wrote to memory of 1840	1572	powershell.exe	96
PID 1572 wrote to memory of 1840	1572	powershell.exe	96
PID 1572 wrote to memory of 1840	1572	powershell.exe	96
PID 1572 wrote to memory of 2380	1572	powershell.exe	97
PID 1572 wrote to memory of 2380	1572	powershell.exe	97
PID 1572 wrote to memory of 2380	1572	powershell.exe	97

C:\Users\Admin\AppData\Local\Temp\cb3cc551561883ab8fc4fb6fc837a469.exe
"C:\Users\Admin\AppData\Local\Temp\cb3cc551561883ab8fc4fb6fc837a469.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2524
- 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:1572
- - 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\5v3nplro\5v3nplro.cmdline"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1072
  - - 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\RESC2D4.tmp" "c:\Users\Admin\AppData\Local\Temp\5v3nplro\CSCB864D1E737C475DBB2095527C87833.TMP"
      4⤵
      PID:1144
- - 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:3424
- - 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:1600
- - 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:4052
- - 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:1548
- - 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:3632
- - 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:3200
- - C:\Windows\SysWOW64\net.exe
    "C:\Windows\system32\net.exe" localgroup Administrators "NT AUTHORITY\NETWORK SERVICE" /add
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:408
  - - C:\Windows\SysWOW64\net1.exe
      C:\Windows\system32\net1 localgroup Administrators "NT AUTHORITY\NETWORK SERVICE" /add
      4⤵
      PID:2488
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /c cmd /c net start rdpdr
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3312
  - - C:\Windows\SysWOW64\cmd.exe
      cmd /c net start rdpdr
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2344
    - - C:\Windows\SysWOW64\net.exe
        
        net start rdpdr
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:1756
      - C:\Windows\SysWOW64\net1.exe
        
        C:\Windows\system32\net1 start rdpdr
        6⤵
        
        PID:2328
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /c cmd /c net start TermService
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1744
  - - C:\Windows\SysWOW64\cmd.exe
      cmd /c net start TermService
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2000
    - - C:\Windows\SysWOW64\net.exe
        
        net start TermService
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:4020
      - C:\Windows\SysWOW64\net1.exe
        
        C:\Windows\system32\net1 start TermService
        6⤵
        
        PID:1936
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /c del %temp%\*.ps1 /f
    3⤵
    PID:1840
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /c del %temp%\*.txt /f
    3⤵
    PID:2380

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/1572-134-0x0000000008300000-0x0000000008301000-memory.dmp

Filesize
4KB

Download
memory/1572-128-0x0000000003540000-0x0000000003541000-memory.dmp

Filesize
4KB

Download
memory/1572-130-0x0000000007870000-0x0000000007871000-memory.dmp

Filesize
4KB

Download
memory/1572-131-0x0000000007F00000-0x0000000007F01000-memory.dmp

Filesize
4KB

Download
memory/1572-132-0x00000000080A0000-0x00000000080A1000-memory.dmp

Filesize
4KB

Download
memory/1572-177-0x0000000009A70000-0x0000000009A71000-memory.dmp

Filesize
4KB

Download
memory/1572-135-0x0000000008180000-0x0000000008181000-memory.dmp

Filesize
4KB

Download
memory/1572-136-0x00000000086D0000-0x00000000086D1000-memory.dmp

Filesize
4KB

Download
memory/1572-138-0x0000000004E62000-0x0000000004E63000-memory.dmp

Filesize
4KB

Download
memory/1572-137-0x0000000004E60000-0x0000000004E61000-memory.dmp

Filesize
4KB

Download
memory/1572-139-0x0000000008930000-0x0000000008931000-memory.dmp

Filesize
4KB

Download
memory/1572-156-0x0000000004E63000-0x0000000004E64000-memory.dmp

Filesize
4KB

Download
memory/1572-141-0x0000000003540000-0x0000000003541000-memory.dmp

Filesize
4KB

Download
memory/1572-145-0x0000000009CF0000-0x0000000009CF1000-memory.dmp

Filesize
4KB

Download
memory/1572-146-0x00000000096A0000-0x00000000096A1000-memory.dmp

Filesize
4KB

Download
memory/1572-127-0x0000000003540000-0x0000000003541000-memory.dmp

Filesize
4KB

Download
memory/1572-154-0x00000000074C0000-0x00000000074C1000-memory.dmp

Filesize
4KB

Download
memory/1572-1128-0x000000007E230000-0x000000007E231000-memory.dmp

Filesize
4KB

Download
memory/1572-129-0x0000000004EB0000-0x0000000004EB1000-memory.dmp

Filesize
4KB

Download
memory/1600-444-0x00000000066C0000-0x00000000066C1000-memory.dmp

Filesize
4KB

Download
memory/1600-445-0x00000000066C2000-0x00000000066C3000-memory.dmp

Filesize
4KB

Download
memory/1600-542-0x000000007E930000-0x000000007E931000-memory.dmp

Filesize
4KB

Download
memory/2524-124-0x0000000007A00000-0x0000000007A01000-memory.dmp

Filesize
4KB

Download
memory/2524-123-0x0000000005E90000-0x0000000005E91000-memory.dmp

Filesize
4KB

Download
memory/2524-125-0x00000000054F4000-0x00000000054F5000-memory.dmp

Filesize
4KB

Download
memory/2524-115-0x0000000000D60000-0x0000000000D61000-memory.dmp

Filesize
4KB

Download
memory/2524-121-0x0000000006200000-0x0000000006201000-memory.dmp

Filesize
4KB

Download
memory/2524-122-0x0000000005EA0000-0x0000000005EA1000-memory.dmp

Filesize
4KB

Download
memory/2524-120-0x00000000054F3000-0x00000000054F4000-memory.dmp

Filesize
4KB

Download
memory/2524-119-0x00000000054F2000-0x00000000054F3000-memory.dmp

Filesize
4KB

Download
memory/2524-118-0x00000000054F0000-0x00000000054F1000-memory.dmp

Filesize
4KB

Download
memory/2524-117-0x0000000005900000-0x0000000005CFF000-memory.dmp

Filesize
4.0MB

Download
memory/3424-214-0x000000007F990000-0x000000007F991000-memory.dmp

Filesize
4KB

Download
memory/3424-192-0x0000000003280000-0x0000000003281000-memory.dmp

Filesize
4KB

Download
memory/3424-184-0x0000000007252000-0x0000000007253000-memory.dmp

Filesize
4KB

Download
memory/3424-182-0x0000000007250000-0x0000000007251000-memory.dmp

Filesize
4KB

Download
memory/3424-179-0x0000000003280000-0x0000000003281000-memory.dmp

Filesize
4KB

Download
memory/3424-180-0x0000000003280000-0x0000000003281000-memory.dmp

Filesize
4KB

Download
memory/4052-698-0x0000000006A22000-0x0000000006A23000-memory.dmp

Filesize
4KB

Download
memory/4052-777-0x000000007E3E0000-0x000000007E3E1000-memory.dmp

Filesize
4KB

Download
memory/4052-697-0x0000000006A20000-0x0000000006A21000-memory.dmp

Filesize
4KB

Download