Infection Channel: Downloaded from the Internet, Dropped by other malware
This malware disguises itself as a Trend Micro product/component. It drops a bitcoin-mining malware.
To get a one-glance comprehensive view of the behavior of this Trojan, refer to the Threat Diagram shown below.
For the related story, you may read the blog post Trojan Disguised as Trend Micro Component Drops Bitcoin-Mining Malware
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.
It executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.
File size: 84,480 bytes
File type: EXE
Memory resident: Yes
Initial samples received date: 17 Nov 2012
Payload: Downloads files
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:
- %User Profile%\{Random File Name}.exe
(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.)
It injects itself into the following processes running in the affected system's memory:
Autostart Technique
This Trojan adds the following registry entries to enable its automatic execution at every system startup:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Winlogon
Taskman = "%User Profile%\{Random File Name}.exe"
Download Routine
This Trojan accesses the following websites to download files:
- {BLOCKED}a.betrule.com
- {BLOCKED}a.agesask.net
- {BLOCKED}a.agesonest.com
Trend Micro detects the dowloaded file as:
It then executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.
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