Threat Description

Antiman

Details

Aliases: Antiman, Email-Worm.Win32.Antiman
Category: Malware
Type: Worm
Platform: W32

Summary



Antiman is an e-mail worm written in Delphi. The most probably origin of this worm is Romania. The worm has its own SMTP engine to send e-mails. The worm harvests victims' e-mail addresses from different files on a local hard drive.



Removal



Automatic Disinfection

Allow F-Secure Anti-Virus to disinfect the relevant files.

For more general information on disinfection, please see Removal Instructions.



Technical Details



The worm is a PE executable file 393 kilobytes long, written in Delphi. The worm's file is not packed.

Installation to system

When run, the worm copies itself as FUNNY.SCR file to Windows folder and also as STARTWIN.EXE file to the startup folder of a current user. Then the worm creates a startup key for its SCR file in the Registry:

[HKCU\Control Panel\Desktop]
 "SCRNSAVE.EXE" = "%WinDir%\funny.scr"


The worm creates the M.TXT file in the root of C: drive to verify that it has suitable access rights.

Spreading in e-mails

Before spreading the worm scans certain files on a hard disk to harvest victims' e-mail addresses. The following files are scanned:

Deleted Items.dbx
 Inbox.dbx
 Outbox.dbx
 C:\Program Files\Yahoo!\Messenger\ypager.log
 C:\Program Files\Yahoo!\Messenger\ypager2.log


To send e-mails the worm uses either the default user's SMTP server or the hardcoded list of SMTP servers:

mail.iasi.rdsnet.ro
 smtp.dnt.ro
 scentra.dntcj.ro
 relay-1.dntis.ro
 mail.easynet.ro
 relay1.romania.eu.net
 mail-relay.eu.net
 smtp.fx.ro
 ns.matco.ro
 mail.mailbox.ro
 mx.kappa.ro
 mx2.kappa.ro
 mx1.pcnet.ro
 mail.rdsnet.ro
 mail.rdslink.ro
 tag.starnets.ro
 mail.totalnet.ro
 relay.totalnet.ro
 mail.xnet.ro
 mail.remote.xnet.ro
 mail.remote1.xnet.ro
 mail.pcnet.ro
 smtp.xnet.ro
 smtp.home.ro
 mail.home.ro
 relay.n0i.net
 omega.tuiasi.ro
 hal.cs.tuiasi.ro


The worm sends messages with different subjects, body texts and attachment names. Here's the list of possible e-mail subjects:

Poza de la mare
 Antivirus
 Sex in camin
 Faza cu camila
 De ce mor mai repede curiosii...
 Antimanele


Here's the list of possible e-mail body texts:

Ti-am trimis ultima poza de la mare. Asta e?
 Asta e ultimul antivirus. Ar trebui sa rezolve toate problemele.
 Ioana, sex in grup in camin. Cred ca o stii si tu ;)
 :)))))))
 Nu deschide acest mesaj! E numai pentru persoanele prea curioase!
 Daca sunteti nu mai suportati manelele la servici, tramvai, taxi, metrou, etc., trimiteti acest mesaj la toti prietenii dvs. !
 Va multumesc (din suflet).


Here's the list of possible worm's attachment names:

scan_picture_0001._JPG.exe
 antivirus.exe
 ioana_divx._AVI.exe
 camila.exe
 curiosii.exe
 antimanele.exe


The worm fakes the sender's e-mail address. It can be one of the following:

alexandra@yahoo.com
 ionut@yahoo.com
 mariana@yahoo.com
 alice@yahoo.com
 bia@yahoo.com
 Ionut Popovici@xnet.ro
 Georgiana@fantasy.ro
 office@bitdefender.ro
 antimanele@antimanele.go.ro

Payload

The worm has a nasty payload. When it scans files on a hard disk, it checks the files with the following extensions:

.mp3
 .wma
 .avi
 .wav
 .mid
 .midi
 .asf
 .mpg
 .mpeg
 .jpeg
 .jpg
 .bmp
 .rar
 .zip
 .ace


If these files contain any of the following strings in their names, they are deleted from a hard drive:

Liviu Guta
 Liviu_Guta
 Nicolae Guta
 Nicolae_Guta
 Copilul de aur
 Copilul_de_aur
 adi de la valcea
 adi_de_la_valcea
 adi de vito
 ady de vito
 florin salam
 florin_salam
 adrian & camy
 stana isbasa
 adrian cm
 adrian copilul minune
 adrian_copilul_minune
 alina si costi
 copilul de aur
 dani de la deva
 gabi din buzau
 gabi de la giulesti
 liviu pustiu
 guta jr
 guta & sorina
 printesa ionela
 don genove
 jean de la craiova
 cristian gusatu
 ovidiu mititelu
 sorinel pustiu
 lucian seres
 mihaela minune
 minodora
 n. guta
 n.guta
 nico cu carbon
 nico_cu_carbon
 sile dorel
 vali vijelie
 carmen serban
 petrica cercel
 nicu paleru
 cata boss
 liviu_guta
 stefan de la barbulesti
 florin peste
 liviu cu mirela
 sorina & florinel
 puiu codreanu
 catalin de la buzau
 daniel dinescu
 relu pustiu
 victor spaniolu
 vali raicu
 adi caval
 carmen dobre
 sorinel copilu de aur
 as da zile de la mine
 sunt seful vostru pana mor
 chefdechef
 chef de chef
 dusmanii mei
 plange sufletul
 jumatate tu, jumatate eu
 ce le-nnebuneste pe femei
 sa cante manelele
 manele


However this routine is quite buggy: files with .AVI and .WAV extensions are not deleted at all, some files with the above given names are not deleted either.



Detection


Detection for this malware was published on April 27th, 2005 in the following F-Secure Anti-Virus updates:
Detection Type: PC
Database: 2005-04-27_01



Technical Details: Alexey Podrezov, April 27th, 2005
Description Last Modified: Alexey Podrezov, April 28th, 2005


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