Analysis by: Anthony Joe Melgarejo
ALIASES:

Linux/Chapro.A trojan (Eset), Backdoor.Linux.Apmod.gen (Kaspersky), Trojan.Gen.2 (Symantec)

 PLATFORM:

Linux

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

  • Threat Type: Backdoor

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

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

However, as of this writing, the said sites are inaccessible.

  TECHNICAL DETAILS

File Size: 39,176 bytes
File Type: ELF
Memory Resident: No
Initial Samples Received Date: 21 Dec 2012

Arrival Details

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

Other Details

This Backdoor connects to the following possibly malicious URL:

  • {BLOCKED}.{BLOCKED}.130.105

However, as of this writing, the said sites are inaccessible.

  SOLUTION

Minimum Scan Engine: 9.300
FIRST VSAPI PATTERN FILE: 9.606.05
FIRST VSAPI PATTERN DATE: 21 Dec 2012
VSAPI OPR PATTERN File: 9.607.00
VSAPI OPR PATTERN Date: 21 Dec 2012

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