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TrojanSpy.Win64.EMOTET.FCA

April 19, 2023
 Analysis by: Francesca Villasanta
 ALIASES:

UDS: Trojan-Banker.Win64.Emotet.cmtd (KASPERSKY); Trojan:Win64/Emotetcrypt.ME!MTB (MICROSOFT)

 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:

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.

It deletes the initially executed copy of itself.

  TECHNICAL DETAILS

File Size:

559574528 bytes

File Type:

DLL

Memory Resident:

No

Initial Samples Received Date:

24 Mar 2023

Payload:

Connects to URLs/IPs, Modifies system registry, Drops 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 adds the following folders:

  • %System%\{random}
  • %AppDataLocal%\{random}

(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.. %AppDataLocal% is the Local Application Data folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

It drops and executes the following files:

  • %System%\{random}\{random characters}.dll
  • %AppDataLocal%\{random}\{random characters}.dll

(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.. %AppDataLocal% is the Local Application Data folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

It adds the following processes:

  • %System%\regsvr32.exe "%System%\{random}\{random characters}.dll"
  • %System%\regsvr32.exe "%AppDataLocal%\{random}\{random characters}.dll"

(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.. %AppDataLocal% is the Local Application Data folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

Other Details

This Trojan Spy connects to the following possibly malicious URL:

  • {BLOCKED}.{BLOCKED}.{BLOCKED}.146:8080
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.93:443
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.124:443
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.120:8080
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.198:8080
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.27:8080
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.56:8080
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.3:8080
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.162:443
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.152:8080
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.25:7080
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.25:443
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.76:8080
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.154:8080
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.28:8080
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.149:8080
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.5:443
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.244:8080
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.199:8080
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.50:443
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.166:8080
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.2:443
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.186:8080
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.86:4143
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.30:8080
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.91:8080
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.47:8080
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.31:7080
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.56:443
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.88:80
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.165:8080
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.65:443
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.143:8080
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.33:8080
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.15:8080
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.137:8080
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.26:8080
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.10:8080
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.249:8080
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.224:8080
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.75:8080
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.120:443
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.162:8080
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.232:8080
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.34:443
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.217:443
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.165:8080
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.41:443
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.3:8080

It deletes the initially executed copy of itself.

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

18.368.08

FIRST VSAPI PATTERN DATE:

07 Apr 2023

VSAPI OPR PATTERN File:

18.369.00

VSAPI OPR PATTERN Date:

08 Apr 2023

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 files detected as TrojanSpy.Win64.EMOTET.FCA

[ Learn More ]
Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden folders in the search result.  
  • %System%\{Random}\{Random characters}.dll
  • %AppDataLocal%\{Random}\{Random characters}.dll

Step 4

Search and delete these folders

[ Learn More ]
Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden folders in the search result.
  • %System%\{Random}
  • %AppDataLocal%\{Random}

Step 5

Scan your computer with your Trend Micro product to clean files detected as TrojanSpy.Win64.EMOTET.FCA. 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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