Worm.PS1.LEMONDUCK.YAAA-A

Infection Channel: Dropped by other malware, Downloaded from the Internet, Propagates via software vulnerabilities

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.

It takes advantage of software vulnerabilities to propagate across networks.

File Size: 187,800 bytes

File Type: PS1

Memory Resident: Yes

Initial Samples Received Date: 13 Feb 2020

Payload: Exploits vulnerability, Disables services, Terminates processes, Steals information

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:

{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
%User Temp%\{7 random uppercase characters}.tmp -deleted afterwards
%User Temp%\{8 random characters}.out -deleted afterwards
%User Temp%\{8 random characters}.cmdline -deleted afterwards
%User Temp%\{8 random characters}.err -deleted afterwards
%User Temp%\{8 random characters}.pdb -deleted afterwards
%User Temp%\{8 random characters}.0.cs -deleted afterwards
%User Temp%\{8 random characters}.tmp -deleted afterwards
%User Temp%\{8 random characters}.dll -deleted afterwards

(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:

"%System%\NETSTAT.EXE" -anop TCP
"%System%\ipconfig.exe" /all
"%System%\ipconfig.exe" /displaydns
"%System%\NETSTAT.EXE" -ano

(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)

It creates the following folders:

{Removable Drive}:\UTFsync

Propagation

This Worm takes advantage of the following software vulnerabilities to propagate across networks:

Microsoft Windows SMB Server (MS17-010) Vulnerability

Process Termination

This Worm terminates the following services if found on the affected system:

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.{BLOCKED}N.COM
WinHelpSvcs
aspnet_staters
clr_optimization
AxInstSV
Zational
DNS Server
Serhiez
SuperProServer
.Net CLR
WissssssnHelp32
WinHasdadelp32
WinHasdelp32
ClipBooks

It 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
SearchIndex
Avira
cohernece
win
SQLforwin
xig
taskmgr1
Workstation
ress
explores

Dropping Routine

This Worm takes advantage of the following software vulnerabilities to drop malicious files:

CVE-2017-8464

Information Theft

This Worm gathers the following data:

User Credentials
OS Version
User Name
Domain Name

Other Details

This Worm does the following:

It deletes the following scheduled tasks:
- AdobeFlashPlayer
- Bluetooths
- Credentials
- Ddrivers
- DNS
- DNS2
- DnsCore
- DnsCore
- DnsScan
- ECDnsCore
- Flash
- FlashPlayer1
- FlashPlayer2
- FlashPlayer3
- gm
- GooglePingConfigs
- HispDemorn
- HomeGroupProvider
- IIS
- LimeRAT-Admin
- Microsoft Telemetry
- Miscfost
- MiscfostNsi
- my1
- Mysa
- Mysa1
- Mysa2
- Mysa3
- Netframework
- ngm
- ok
- Oracle Java
- Oracle Java Update
- Oracle Products Reporter
- RavTask
- skycmd
- Sorry
- Spooler SubSystem Service
- SYSTEM
- System Log Security Check
- SYSTEMa
- TablteInputout
- Update
- Update service for Windows Service
- Update service for products
- Update_windows
- Update1
- Update2
- Update3
- Update4
- WebServers
- werclpsyport
- Windows_Update
- WindowsLogTasks
- WindowsUpdate1
- WindowsUpdate2
- WindowsUpdate3
- WwANsvc
It terminates the processes that contain 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
- miningpoolhubcoins
- mixpools.org
- mixpools.org
- 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 is capable of propagating in the local network via the following means:
- SMB Exploit (MS17-010)
- MSSQL Brute forcing
- Dumping Windows Domain Credentials using any of the following techniques/tools:
Capable of performing Brute Force Attack. It uses the following credentials:
- Username:
- Password:
- NTLM hashes:

Minimum Scan Engine: 9.850

FIRST VSAPI PATTERN FILE: 15.698.04

FIRST VSAPI PATTERN DATE: 21 Feb 2020

VSAPI OPR PATTERN File: 15.699.00

VSAPI OPR PATTERN Date: 22 Feb 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

Restart in Safe Mode

[ Learn More ]

Step 4

Search and delete these files

[ 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
{Removable Drive}:\UTFsync

Step 5

Restart in normal mode and scan your computer with your Trend Micro product for files detected as Worm.PS1.LEMONDUCK.YAAA-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 this Knowledge Base page for more information.

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