Worm.PS1.LEMONDUCK.YCAC-A

This Worm arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

File Size: 188,252 bytes

Memory Resident: Yes

Initial Samples Received Date: 18 Mar 2020

Arrival Details

This Worm arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Installation

This Worm drops the following files:

%User Temp%\{8 random characters}.tmp - deleted afterwards
%User Temp%\{8 random characters}.0.cs - deleted afterwards
%User Temp%\{8 random characters}.dll - deleted afterwards
%User Temp%\{8 random characters}.cmdline - deleted afterwards
%User Temp%\{8 random characters}.out - deleted afterwards
%User Temp%\{8 random characters}.err - deleted afterwards
%User Temp%\{8 random characters}.pdb - deleted afterwards
%User Temp%\CSC{4 random numbers}.tmp - deleted afterwards
%User Temp%\RES{4 random numbers}.tmp - deleted afterwards
{Removable Drive}:\Dblue3.lnk
{Removable Drive}:\Eblue3.lnk
{Removable Drive}:\Fblue3.lnk
{Removable Drive}:\Gblue3.lnk
{Removable Drive}:\Hblue3.lnk
{Removable Drive}:\Iblue3.lnk
{Removable Drive}:\Jblue3.lnk
{Removable Drive}:\Kblue3.lnk
{Removable Drive}:\blue3.bin
{Removable Drive}:\Dblue6.lnk → detected as Trojan.LNK.CVE20178464.B
{Removable Drive}:\Eblue6.lnk → detected as Trojan.LNK.CVE20178464.B
{Removable Drive}:\Fblue6.lnk → detected as Trojan.LNK.CVE20178464.B
{Removable Drive}:\Gblue6.lnk → detected as Trojan.LNK.CVE20178464.B
{Removable Drive}:\Hblue6.lnk → detected as Trojan.LNK.CVE20178464.B
{Removable Drive}:\Iblue6.lnk → detected as Trojan.LNK.CVE20178464.B
{Removable Drive}:\Jblue6.lnk → detected as Trojan.LNK.CVE20178464.B
{Removable Drive}:\Kblue6.lnk→ detected as Trojan.LNK.CVE20178464.B
{Removable Drive}:\blue6.bin
{Removable Drive}:\UTFsync\inf_data

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

It adds the following processes:

"%Windows%\Microsoft.NET\Framework\v2.0.50727\csc.exe" /noconfig /fullpaths @"%User Temp%{8 random characters}.cmdline"
%Windows%\Microsoft.NET\Framework\v2.0.50727\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:%User Temp%\RES{4 random numbers}.tmp" "%User Temp%\CSC{4 random numbers}.tmp"
"%System%\WindowsPowerShell\v1.0\powershell.exe" -s -NoLogo -NoProfile
"%System%\NETSTAT.EXE" -anop TCP
"%System%taskmgr.exe"
"%System%ipconfig.exe" /all
"%System%ipconfig.exe" /displaydns
"%System%NETSTAT.EXE" -ano

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).. %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)

Process Termination

This Worm terminates processes or services that contain any of the following strings if found running in the affected system's memory:

SC
WerMgr
WerFault
DW20
msinfo
XMR*
xmrig*
minerd
MinerGate
Carbon
yamm1
upgeade
auto-upgeade
svshost
SystemIIS
SystemIISSec
WindowsUpdater*
WindowsDefender*
update
carss
service
csrsc
cara
javaupd
gxdrv
lsmosee
secuams
SQLEXPRESS_X64_86
Calligrap
Sqlceqp
Setting
Uninsta
conhoste
Setring
Galligrp
Imaging
taskegr
Terms.EXE
360
8866
9966
9696
9797
svchosti
SearchIndexAvira
cohernece
win
SQLforwin
xig*
taskmgr1
Workstation
ress
explores

Other Details

This Worm does the following:

It disables, stops, and deletes the following services:
- xWinWpdSrv
- SVSHost
- Microsoft Telemetry
- lsass
- Microsoft
- system
- Oracleupdate
- CLR
- sysmgt
- \gm
- WmdnPnSN
- Sougoudl
- National
- Nationaaal
- Natimmonal
- Nationaloll
- Nationalmll
- Nationalaie
- Nationalwpi
- WinHelp32
- WinHelp64
- Samserver
- RpcEptManger
- NetMsmqActiv Media NVIDIA
- Sncryption Media Playeq
- SxS
- WinSvc
- mssecsvc2.1
- mssecsvc2.0
- Windows_Update
- Windows Managers
- SvcNlauser
- WinVaultSvc
- Xtfy
- Xtfya
- Xtfyxxx
- 360rTys
- IPSECS
- MpeSvc
- SRDSL
- WifiService
- ALGM
- wmiApSrvs
- wmiApServs
- taskmgr1
- WebServers
- ExpressVNService
- WWW.DDOS.CN.COM
- WinHelpSvcs
- aspnet_staters
- clr_optimization
- AxInstSV
- Zational
- DNS Server
- Serhiez
- SuperProServer
- .Net CLR
- WissssssnHelp32
- WinHasdadelp32
- WinHasdelp32
- ClipBooks
It force deletes the following scheduled tasks:
- my1
- Mysa
- Mysa1
- Mysa2
- Mysa3
- ok
- Oracle Java
- Oracle Java Update
- Microsoft Telemetry
- Spooler SubSystem Service
- Oracle Products Reporter
- Update service for products
- gm
- ngm
- Sorry
- Windows_Update
- Update_windows
- WindowsUpdate1
- WindowsUpdate2
- WindowsUpdate3
- AdobeFlashPlayer
- FlashPlayer1
- FlashPlayer2
- FlashPlayer3
- IIS
- WindowsLogTasks
- System Log Security Check
- Update
- Update1
- Update2
- Update3
- Update4
- DNS
- SYSTEM
- DNS2
- SYSTEMa
- skycmd
- Miscfost
- Netframework
- Flash
- RavTask
- GooglePingConfigs
- HomeGroupProvider
- MiscfostNsi
- WwANsvc
- Bluetooths
- Ddrivers
- DnsScan
- WebServers
- Credentials
- TablteInputout
- werclpsyport
- HispDemorn
- LimeRAT-Admin
- DnsCore
- "Update service for Windows Service"
- DnsCore
- ECDnsCore
Capable of performing Brute Force Attack. It uses the following credentials:
- Username
- Password
- NTLM Hashes
It terminates processes containing the following strings in its command line:
- pool.monero.hashvault.pro
- blazepool
- blockmasters
- blockmasterscoins
- bohemianpool
- cryptmonero
- cryptonight
- crypto-pool
- --donate-level
- dwarfpool
- hashrefinery
- hashvault.pro
- iwanttoearn.money
- --max-cpu-usage
- mine.bz
- minercircle.com
- minergate
- miners.pro
- mineXMR
- minexmr
- mineXMR
- mineXMR
- miningpoolhubcoins
- mixpools.org
- mixpools.org
- monero
- monero
- monero.lindon-pool.win
- moriaxmr.com
- mypool.online
- nanopool.org
- nicehash
- -p x
- pool.electroneum.hashvault.pro
- pool.xmr
- poolto.be
- prohash
- prohash.net
- ratchetmining.com
- slushpool
- stratum+
- suprnova.cc
- teracycle.net
- usxmrpool
- viaxmr.com
- xmrpool
- yiimp
- zergpool
- zergpoolcoins
- zpool
It terminates processes that established a TCP connection to the following ports:
- 1111
- 2222
- 3333
- 4444
- 5555
- 6666
- 7777
- 8888
- 9999
- 14433
- 14444
- 45560
- 65333
It is capable of propagating in the local network via the following means:
- SMB Exploit
- MS-SQL Brute forcing
- Pass-The-Hash attack
- RDP Brute forcing

Minimum Scan Engine: 9.800

FIRST VSAPI PATTERN FILE: 15.936.02

FIRST VSAPI PATTERN DATE: 17 Jun 2020

VSAPI OPR PATTERN File: 15.937.00

VSAPI OPR PATTERN Date: 18 Jun 2020

Step 1

Before doing any scans, Windows 7, Windows 8, Windows 8.1, and Windows 10 users must disable System Restore to allow full scanning of their computers.

Step 2

Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.

Step 3

Identify and terminate files detected as Worm.PS1.LEMONDUCK.YCAC-A

[ Learn More ]

Windows Task Manager may not display all running processes. In this case, please use a third-party process viewer, preferably Process Explorer, to terminate the malware/grayware/spyware file. You may download the said tool here.
If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.

Step 4

Search and delete this file

[ Learn More ]

There may be some files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.

{Removable Drive}:\Dblue3.lnk
{Removable Drive}:\Eblue3.lnk
{Removable Drive}:\Fblue3.lnk
{Removable Drive}:\Gblue3.lnk
{Removable Drive}:\Hblue3.lnk
{Removable Drive}:\Iblue3.lnk
{Removable Drive}:\Jblue3.lnk
{Removable Drive}:\Kblue3.lnk
{Removable Drive}:\blue3.bin
{Removable Drive}:\Dblue6.lnk
{Removable Drive}:\Eblue6.lnk
{Removable Drive}:\Fblue6.lnk
{Removable Drive}:\Gblue6.lnk
{Removable Drive}:\Hblue6.lnk
{Removable Drive}:\Iblue6.lnk
{Removable Drive}:\Jblue6.lnk
{Removable Drive}:\Kblue6.lnk
{Removable Drive}:\blue6.bin
{Removable Drive}:\UTFsync\inf_data

Step 5

Scan your computer with your Trend Micro product to delete files detected as Worm.PS1.LEMONDUCK.YCAC-A. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check the following Trend Micro Support pages for more information:

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