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Ransom_SPORA.AUSBX

April 05, 2017
 ALIASES:

Ransom:Win32/Spora!rfn (Microsoft); Ransomware-FMJ!7251A3747064 (McAfee); Packed.Generic.493 (Symantec); HEUR:Trojan.Win32.Generic (Kaspersky); Mal/Elenoocka-E (Sophos); Trojan.Win32.Generic!BT (Sunbelt); Trojan horse Ransom_s.LR (AVG)

 PLATFORM:

Windows

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

  • 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:

112,640 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

05 Apr 2017

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 the following copies of itself into the affected system:

  • %System Root%\548c0a76324aec7f.exe

(Note: %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.)

Other System Modifications

This Trojan deletes the following files:

  • {malware path and file name}:zone.identifier

Dropping Routine

This Trojan drops the following files:

  • %User Profile%\Application Data\US958-E1ETZ-TZTXH-TAETF
  • %User Profile%\Application Data\US958-E1ETZ-TZTXH-TAETF.html
  • A:\145559504
  • %System Root%\145559504
  • %System Root%\Documents and Settings.lnk
  • %Program Files%.lnk
  • %Windows%.lnk
  • %Desktop%\145559504
  • %System Root%\US958-E1ETZ-TZTXH-TAETF.html
  • %User Startup%\US958-E1ETZ-TZTXH-TAETF.html

(Note: %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.. %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.. %Program Files% is the Program Files folder, where it usually is C:\Program Files on all Windows operating system versions; C:\Program Files (x86) for 32-bit applications running on Windows 64-bit operating systems.. %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.. %Desktop% is the desktop folder, where it usually is C:\Documents and Settings\{user name}\Desktop in Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\Desktop in Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.. %User Startup% is the current user's Startup folder, which is usually C:\Documents and Settings\{user}\Start Menu\Programs\Startup on Windows 2000 and XP, and C:\Documents and Settings\{User name}\Start Menu\Programs\Startup on Windows Vista, 7, and 8.)

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine:

9.8

Step 1

Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.

Step 2

Search and delete these components

[ Learn More ]
There may be some components 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 Profile%\Application Data\US958-E1ETZ-TZTXH-TAETF
  • %User Profile%\Application Data\US958-E1ETZ-TZTXH-TAETF.html
  • A:\145559504
  • %System Root%\145559504
  • %System Root%\Documents and Settings.lnk
  • %Program Files%.lnk
  • %Windows%.lnk
  • %Desktop%\145559504
  • %System Root%\US958-E1ETZ-TZTXH-TAETF.html
  • %User Startup%\US958-E1ETZ-TZTXH-TAETF.html

Step 3

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

Step 4

Restore this file from backup only Microsoft-related files will be restored. If this malware/grayware also deleted files related to programs that are not from Microsoft, please reinstall those programs on you computer again.

  • {malware path and file name}:zone.identifier


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