TrojanSpy.Win32.ICEDID.D

May 10, 2024
 Analysis by: Neljorn Nathaniel Aguas
 ALIASES:

UDS:AdWare.Win32.Convagent.gen (KASPERSKY)

 PLATFORM:

Windows

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

  • Threat Type: Trojan Spy

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Downloaded from the Internet, Dropped by other malware

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

  TECHNICAL DETAILS

File Size:

1,771,184 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

08 May 2024

Payload:

Connects to URLs/IPs, Drops files, Downloads files

Arrival Details

This Trojan Spy 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 Trojan Spy drops the following files:

  • %User Temp%\is-{Random Alphanumeric Characters}.tmp\{Malware Name}.tmp
  • %User Temp%\Tar142D.tmp → extracted from authrootstl.cab
  • %AppDataLocalLow%\Microsoft\CryptnetUrlCache\MetaData\070E0202839D9D67350CD2613E78E416
  • %AppDataLocalLow%\Microsoft\CryptnetUrlCache\MetaData\77EC63BDA74BD0D0E0426DC8F8008506

(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).. %AppDataLocalLow% is the LocalLow Application Data folder, which is usually C:\Users\{user name}\AppData\LocalLow on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

It adds the following processes:

  • "%User Temp%\is-{Random Alphanumeric Characters}.tmp\{Malware Name}.tmp" /SL5="$140280,837550,832512,{Malware Path}\{Malware Name}.exe"

(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).)

Download Routine

This Trojan Spy accesses the following websites to download files:

  • http://{BLOCKED}2.us/x.cer → downloads a file named x.cer
  • http://{BLOCKED}indowsupdate.com/msdownload/update/v3/static/trustedr/en/authrootstl.cab?7a34ff8a15e405fa → downloads a file named authrootstl.cab

It saves the files it downloads using the following names:

  • x.cer saved as:
    • %AppDataLocalLow%\Microsoft\CryptnetUrlCache\Content\070E0202839D9D67350CD2613E78E416
  • authrootstl.cab saved as:
    • %User Temp%\Cab142C.tmp
    • %AppDataLocalLow%\Microsoft\CryptnetUrlCache\Content\77EC63BDA74BD0D0E0426DC8F8008506

(Note: %AppDataLocalLow% is the LocalLow Application Data folder, which is usually C:\Users\{user name}\AppData\LocalLow on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).. %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).)

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

19.328.03

FIRST VSAPI PATTERN DATE:

08 May 2024

VSAPI OPR PATTERN File:

19.329.00

VSAPI OPR PATTERN Date:

09 May 2024

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

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.  
  • %User Temp%\is-{Random Alphanumeric Characters}.tmp\{Malware Name}.tmp
  • %User Temp%\Cab142C.tmp
  • %User Temp%\Tar142D.tmp
  • %AppDataLocalLow%\Microsoft\CryptnetUrlCache\MetaData\070E0202839D9D67350CD2613E78E416
  • %AppDataLocalLow%\Microsoft\CryptnetUrlCache\MetaData\77EC63BDA74BD0D0E0426DC8F8008506
  • %AppDataLocalLow%\Microsoft\CryptnetUrlCache\Content\070E0202839D9D67350CD2613E78E416
  • %AppDataLocalLow%\Microsoft\CryptnetUrlCache\Content\77EC63BDA74BD0D0E0426DC8F8008506

Step 4

Scan your computer with your Trend Micro product to delete files detected as TrojanSpy.Win32.ICEDID.D. 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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