servhelper | f464dae032967264173885899186be9eac89bd2016ded5ebc38c705fa6b1b625

Analysis

max time kernel
129s
max time network
125s
platform
windows10_x64
resource
win10-en-20211014
submitted
16-10-2021 10:32

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General

Target

2e3b62f4f1669b3615608ea31e1796dd.exe
Size

6.7MB
MD5

2e3b62f4f1669b3615608ea31e1796dd
SHA1

9f9584588e480c0cfc18b770da47b00919e24219
SHA256

f464dae032967264173885899186be9eac89bd2016ded5ebc38c705fa6b1b625
SHA512

2879f87ce2e3c075512408fbdb17a01209663c2f635c3e07cec1d8e9b1f0490c9219eea2229dcd5863467435d35bef874e9d5fd243e46b02850d0157288b95af

Score

10^/10

servhelper xmrig agilenet 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

Executes dropped EXE 1 IoCs

pid	Process
3536	InstallUtil.exe

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

Deletes itself 1 IoCs

pid	Process
2344	powershell.exe

Obfuscated with Agile.Net obfuscator 1 IoCs

Detects use of the Agile.Net commercial obfuscator, which is capable of entity renaming and control flow obfuscation.

agilenet

resource	yara_rule
behavioral2/memory/3132-122-0x00000000073F0000-0x0000000007411000-memory.dmp	agile_net

Drops file in System32 directory 1 IoCs

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

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3132 set thread context of 3536	3132	2e3b62f4f1669b3615608ea31e1796dd.exe	70

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
3148	reg.exe

Runs net.exe

Suspicious behavior: EnumeratesProcesses 17 IoCs

pid	Process
3132	2e3b62f4f1669b3615608ea31e1796dd.exe
3132	2e3b62f4f1669b3615608ea31e1796dd.exe
2344	powershell.exe
2344	powershell.exe
2344	powershell.exe
624	powershell.exe
624	powershell.exe
624	powershell.exe
584	powershell.exe
584	powershell.exe
584	powershell.exe
2288	powershell.exe
2288	powershell.exe
2288	powershell.exe
2344	powershell.exe
2344	powershell.exe
2344	powershell.exe

Suspicious behavior: LoadsDriver 1 IoCs

pid	Process
632	Process not Found

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	3132	2e3b62f4f1669b3615608ea31e1796dd.exe
Token: SeDebugPrivilege	2344	powershell.exe
Token: SeDebugPrivilege	624	powershell.exe
Token: SeDebugPrivilege	584	powershell.exe
Token: SeDebugPrivilege	2288	powershell.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 3132 wrote to memory of 3536	3132	2e3b62f4f1669b3615608ea31e1796dd.exe	70
PID 3132 wrote to memory of 3536	3132	2e3b62f4f1669b3615608ea31e1796dd.exe	70
PID 3132 wrote to memory of 3536	3132	2e3b62f4f1669b3615608ea31e1796dd.exe	70
PID 3132 wrote to memory of 3536	3132	2e3b62f4f1669b3615608ea31e1796dd.exe	70
PID 3132 wrote to memory of 3536	3132	2e3b62f4f1669b3615608ea31e1796dd.exe	70
PID 3132 wrote to memory of 3536	3132	2e3b62f4f1669b3615608ea31e1796dd.exe	70
PID 3132 wrote to memory of 3536	3132	2e3b62f4f1669b3615608ea31e1796dd.exe	70
PID 3132 wrote to memory of 3536	3132	2e3b62f4f1669b3615608ea31e1796dd.exe	70
PID 3132 wrote to memory of 3536	3132	2e3b62f4f1669b3615608ea31e1796dd.exe	70
PID 3536 wrote to memory of 2344	3536	InstallUtil.exe	72
PID 3536 wrote to memory of 2344	3536	InstallUtil.exe	72
PID 3536 wrote to memory of 2344	3536	InstallUtil.exe	72
PID 2344 wrote to memory of 2576	2344	powershell.exe	74
PID 2344 wrote to memory of 2576	2344	powershell.exe	74
PID 2344 wrote to memory of 2576	2344	powershell.exe	74
PID 2576 wrote to memory of 1980	2576	csc.exe	75
PID 2576 wrote to memory of 1980	2576	csc.exe	75
PID 2576 wrote to memory of 1980	2576	csc.exe	75
PID 2344 wrote to memory of 624	2344	powershell.exe	78
PID 2344 wrote to memory of 624	2344	powershell.exe	78
PID 2344 wrote to memory of 624	2344	powershell.exe	78
PID 2344 wrote to memory of 584	2344	powershell.exe	80
PID 2344 wrote to memory of 584	2344	powershell.exe	80
PID 2344 wrote to memory of 584	2344	powershell.exe	80
PID 2344 wrote to memory of 2288	2344	powershell.exe	82
PID 2344 wrote to memory of 2288	2344	powershell.exe	82
PID 2344 wrote to memory of 2288	2344	powershell.exe	82
PID 2344 wrote to memory of 3412	2344	powershell.exe	84
PID 2344 wrote to memory of 3412	2344	powershell.exe	84
PID 2344 wrote to memory of 3412	2344	powershell.exe	84
PID 2344 wrote to memory of 3148	2344	powershell.exe	85
PID 2344 wrote to memory of 3148	2344	powershell.exe	85
PID 2344 wrote to memory of 3148	2344	powershell.exe	85
PID 2344 wrote to memory of 68	2344	powershell.exe	86
PID 2344 wrote to memory of 68	2344	powershell.exe	86
PID 2344 wrote to memory of 68	2344	powershell.exe	86
PID 2344 wrote to memory of 3684	2344	powershell.exe	87
PID 2344 wrote to memory of 3684	2344	powershell.exe	87
PID 2344 wrote to memory of 3684	2344	powershell.exe	87
PID 3684 wrote to memory of 2424	3684	net.exe	88
PID 3684 wrote to memory of 2424	3684	net.exe	88
PID 3684 wrote to memory of 2424	3684	net.exe	88
PID 2344 wrote to memory of 608	2344	powershell.exe	89
PID 2344 wrote to memory of 608	2344	powershell.exe	89
PID 2344 wrote to memory of 608	2344	powershell.exe	89
PID 608 wrote to memory of 204	608	cmd.exe	90
PID 608 wrote to memory of 204	608	cmd.exe	90
PID 608 wrote to memory of 204	608	cmd.exe	90
PID 204 wrote to memory of 184	204	cmd.exe	91
PID 204 wrote to memory of 184	204	cmd.exe	91
PID 204 wrote to memory of 184	204	cmd.exe	91
PID 184 wrote to memory of 1216	184	net.exe	92
PID 184 wrote to memory of 1216	184	net.exe	92
PID 184 wrote to memory of 1216	184	net.exe	92
PID 2344 wrote to memory of 1572	2344	powershell.exe	93
PID 2344 wrote to memory of 1572	2344	powershell.exe	93
PID 2344 wrote to memory of 1572	2344	powershell.exe	93
PID 1572 wrote to memory of 3756	1572	cmd.exe	94
PID 1572 wrote to memory of 3756	1572	cmd.exe	94
PID 1572 wrote to memory of 3756	1572	cmd.exe	94
PID 3756 wrote to memory of 784	3756	cmd.exe	95
PID 3756 wrote to memory of 784	3756	cmd.exe	95
PID 3756 wrote to memory of 784	3756	cmd.exe	95
PID 784 wrote to memory of 2660	784	net.exe	96

C:\Users\Admin\AppData\Local\Temp\2e3b62f4f1669b3615608ea31e1796dd.exe
"C:\Users\Admin\AppData\Local\Temp\2e3b62f4f1669b3615608ea31e1796dd.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3132
- C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe
  "C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:3536
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" -ep bypass & 'C:\Users\Admin\AppData\Local\Temp\\ready.ps1'
    3⤵
    - Deletes itself
    - Drops file in System32 directory
    - Drops file in Windows directory
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2344
  - - 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\mcs55g2f\mcs55g2f.cmdline"
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2576
    - - 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\RESD51E.tmp" "c:\Users\Admin\AppData\Local\Temp\mcs55g2f\CSC27FE41FAA71B45F0B8E9CABA9ADC1DF5.TMP"
        5⤵
        
        PID:1980
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe" -Version 5.1 -s -NoLogo -NoProfile
      4⤵
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:624
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe" -Version 5.1 -s -NoLogo -NoProfile
      4⤵
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:584
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe" -Version 5.1 -s -NoLogo -NoProfile
      4⤵
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:2288
  - - 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
      4⤵
      PID:3412
  - - 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
      4⤵
      Modifies registry key
      PID:3148
  - - 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
      4⤵
      PID:68
  - - C:\Windows\SysWOW64\net.exe
      "C:\Windows\system32\net.exe" localgroup Administrators "NT AUTHORITY\NETWORK SERVICE" /add
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3684
    - - C:\Windows\SysWOW64\net1.exe
        
        C:\Windows\system32\net1 localgroup Administrators "NT AUTHORITY\NETWORK SERVICE" /add
        5⤵
        
        PID:2424
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c cmd /c net start rdpdr
      4⤵
      Suspicious use of WriteProcessMemory
      PID:608
    - - C:\Windows\SysWOW64\cmd.exe
        
        cmd /c net start rdpdr
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:204
      - C:\Windows\SysWOW64\net.exe
        
        net start rdpdr
        6⤵
        Suspicious use of WriteProcessMemory
        
        PID:184
        
        C:\Windows\SysWOW64\net1.exe
        
        C:\Windows\system32\net1 start rdpdr
        7⤵
        
        PID:1216
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c cmd /c net start TermService
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1572
    - - C:\Windows\SysWOW64\cmd.exe
        
        cmd /c net start TermService
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:3756
      - C:\Windows\SysWOW64\net.exe
        
        net start TermService
        6⤵
        Suspicious use of WriteProcessMemory
        
        PID:784
        
        C:\Windows\SysWOW64\net1.exe
        
        C:\Windows\system32\net1 start TermService
        7⤵
        
        PID:2660
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c del %temp%\*.ps1 /f
      4⤵
      PID:3772
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c del %temp%\*.txt /f
      4⤵
      PID:1780

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/584-466-0x0000000000F72000-0x0000000000F73000-memory.dmp

Filesize
4KB

Download
memory/584-465-0x0000000000F70000-0x0000000000F71000-memory.dmp

Filesize
4KB

Download
memory/584-558-0x000000007F460000-0x000000007F461000-memory.dmp

Filesize
4KB

Download
memory/624-208-0x00000000070F0000-0x00000000070F1000-memory.dmp

Filesize
4KB

Download
memory/624-229-0x000000007EAA0000-0x000000007EAA1000-memory.dmp

Filesize
4KB

Download
memory/624-209-0x00000000070F2000-0x00000000070F3000-memory.dmp

Filesize
4KB

Download
memory/624-201-0x0000000004DE0000-0x0000000004DE1000-memory.dmp

Filesize
4KB

Download
memory/624-200-0x0000000004DE0000-0x0000000004DE1000-memory.dmp

Filesize
4KB

Download
memory/2288-814-0x000000007ED70000-0x000000007ED71000-memory.dmp

Filesize
4KB

Download
memory/2288-718-0x00000000070B0000-0x00000000070B1000-memory.dmp

Filesize
4KB

Download
memory/2288-719-0x00000000070B2000-0x00000000070B3000-memory.dmp

Filesize
4KB

Download
memory/2344-167-0x0000000009630000-0x0000000009631000-memory.dmp

Filesize
4KB

Download
memory/2344-148-0x0000000003520000-0x0000000003521000-memory.dmp

Filesize
4KB

Download
memory/2344-159-0x0000000008600000-0x0000000008601000-memory.dmp

Filesize
4KB

Download
memory/2344-160-0x00000000088C0000-0x00000000088C1000-memory.dmp

Filesize
4KB

Download
memory/2344-157-0x0000000008210000-0x0000000008211000-memory.dmp

Filesize
4KB

Download
memory/2344-162-0x0000000003520000-0x0000000003521000-memory.dmp

Filesize
4KB

Download
memory/2344-166-0x0000000009EF0000-0x0000000009EF1000-memory.dmp

Filesize
4KB

Download
memory/2344-158-0x00000000085E0000-0x00000000085E1000-memory.dmp

Filesize
4KB

Download
memory/2344-1150-0x000000007EF20000-0x000000007EF21000-memory.dmp

Filesize
4KB

Download
memory/2344-156-0x00000000072E2000-0x00000000072E3000-memory.dmp

Filesize
4KB

Download
memory/2344-155-0x00000000072E0000-0x00000000072E1000-memory.dmp

Filesize
4KB

Download
memory/2344-153-0x0000000007F50000-0x0000000007F51000-memory.dmp

Filesize
4KB

Download
memory/2344-152-0x0000000007850000-0x0000000007851000-memory.dmp

Filesize
4KB

Download
memory/2344-151-0x0000000007920000-0x0000000007921000-memory.dmp

Filesize
4KB

Download
memory/2344-150-0x0000000007170000-0x0000000007171000-memory.dmp

Filesize
4KB

Download
memory/2344-175-0x0000000007430000-0x0000000007431000-memory.dmp

Filesize
4KB

Download
memory/2344-149-0x0000000003520000-0x0000000003521000-memory.dmp

Filesize
4KB

Download
memory/2344-189-0x00000000072E3000-0x00000000072E4000-memory.dmp

Filesize
4KB

Download
memory/2344-198-0x00000000099F0000-0x00000000099F1000-memory.dmp

Filesize
4KB

Download
memory/3132-121-0x0000000006980000-0x0000000006981000-memory.dmp

Filesize
4KB

Download
memory/3132-123-0x0000000007490000-0x0000000007491000-memory.dmp

Filesize
4KB

Download
memory/3132-115-0x0000000000F50000-0x0000000000F51000-memory.dmp

Filesize
4KB

Download
memory/3132-119-0x0000000005F30000-0x0000000005F31000-memory.dmp

Filesize
4KB

Download
memory/3132-120-0x0000000006890000-0x0000000006891000-memory.dmp

Filesize
4KB

Download
memory/3132-117-0x00000000062F0000-0x00000000062F1000-memory.dmp

Filesize
4KB

Download
memory/3132-122-0x00000000073F0000-0x0000000007411000-memory.dmp

Filesize
132KB

Download
memory/3132-118-0x0000000005E90000-0x0000000005E91000-memory.dmp

Filesize
4KB

Download
memory/3132-127-0x000000000D4D0000-0x000000000D4D1000-memory.dmp

Filesize
4KB

Download
memory/3132-126-0x0000000009400000-0x000000000940B000-memory.dmp

Filesize
44KB

Download
memory/3132-125-0x0000000006981000-0x0000000006982000-memory.dmp

Filesize
4KB

Download
memory/3132-124-0x0000000007450000-0x0000000007451000-memory.dmp

Filesize
4KB

Download
memory/3536-139-0x0000000005580000-0x0000000005581000-memory.dmp

Filesize
4KB

Download
memory/3536-131-0x0000000000B00000-0x0000000000F0B000-memory.dmp

Filesize
4.0MB

Download
memory/3536-134-0x0000000000B00000-0x0000000000F0B000-memory.dmp

Filesize
4.0MB

Download
memory/3536-136-0x0000000000B00000-0x0000000000B01000-memory.dmp

Filesize
4KB

Download
memory/3536-138-0x00000000059A0000-0x0000000005D9F000-memory.dmp

Filesize
4.0MB

Download
memory/3536-140-0x0000000005582000-0x0000000005583000-memory.dmp

Filesize
4KB

Download
memory/3536-143-0x0000000005E10000-0x0000000005E11000-memory.dmp

Filesize
4KB

Download
memory/3536-145-0x0000000005584000-0x0000000005585000-memory.dmp

Filesize
4KB

Download
memory/3536-144-0x0000000005583000-0x0000000005584000-memory.dmp

Filesize
4KB

Download