Analysis by: JessaD
ALIASES:

Backdoor:Win32/Qakbot.gen!arc3 (Microsoft)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

This Trojan arrives as a dropped file by a variant of the WORM_QAKBOT family.

This is the general configuration file that is part of the QAKBOT package. Once decrypted, it typically contains the following information on the reference to the components and their corresponding random filenames in the system, IRC data, FTP hosts (upload sites) and infection logs.

  TECHNICAL DETAILS

File Size: 743 bytes
File Type: None
Memory Resident: No
Initial Samples Received Date: 23 Feb 2011

Arrival Details

This malware arrives via the following means:

  • Dropped by a variant of the WORM_QAKBOT family

Other Details

Based on analysis of the codes, it has the following capabilities:

  • This is the general configuration file that is part of the QAKBOT package. Once decrypted, it typically contains the following information:
    • reference to the components and their corresponding random filenames in the system
    • IRC data
    • FTP hosts (upload sites)
    • infection log
  • For this particular sample, the decrypted data as well as their description are below:
    • Component File References
    • alias__qbot.cb=olgaider.dll -> configuration file
    • alias__qbotinj.exe=olgaiderl.exe -> invokes explorer.exe to inject alias__qbot.dll to IEXPLORE.EXE thus, creating a hidden instance of IEXPLORE.EXE
    • alias__qbot.dll=olgaiderl.dll -> main component
    • alias_seclog.txt=olgaide.dll -> contains the log information
    • alias_si.txt=ordvdkq -> contains the system information
    • alias_ps_dump=azaoul45s -> contains the public storage dump
    • alias_qa.bin=ffgxipu -> package file which contains the components mentioned above
    • IRC Information
    • irc_ssl_server_port=16668
    • irc_pass=Zrmausakl1829997
    • irc_my_nick=wlhfcy485264
    • P2P Information
    • p2p_node_lst=http://{BLOCKED}1.in/cgi-bin/ls1.pl
    • FTP Upload Sites Including Usernames and Passwords
    • ftphost_1=77.221.134.75:agamain:qu5end8k:/.cpanel
    • ftphost_2=ftp.acmeinformation.com:{BLOCKED}s@acmeinformation.com:zubri51241:
    • ftphost_3=ftp.hunterscentral.com:{BLOCKED}er@hunterscentral.com:kolbasa25:
    • ftphost_4=s046.panelboxmanager.com:equipem1:4Y2V64b0dy67:/.last
    • Configuration File Version
    • update_conf_ver=856
    • Directory where the Malware is Installed
    • home_dir=c:\documents and settings\all users\application data\microsoft\olgaiderl
    • Time the Malware is Installed
    • install_time=12.16.46-17/02/2011

  SOLUTION

Minimum Scan Engine: 8.900

Step 1

For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.

Step 2

Scan your computer with your Trend Micro product to delete files detected as TROJ_QAKCFG.RAP. 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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