Analysis by: Maria Emreen Viray
ALIASES:

Trojan:Win32/Emotetcrypt.GI!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

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

Tamaño del archivo 258,560 bytes
Tipo de archivo DLL
Residente en memoria Yes
Fecha de recepción de las muestras iniciales 19 Nov 2021

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 drops the following copies of itself into the affected system:

  • If executed without administrative rights:
    • %AppDataLocal%\{random characters}\{random characters}.{3 random characters}
  • If executed with administrative rights:
    • %System%\{random characters}\{random characters}.{3 random characters}

(Note: %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).. %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)

It adds the following processes:

  • If executed without administrative rights:
    • "%AppDataLocal%\{random characters}.{3 random characters}",{random characters}
    • "%AppDataLocal%\{random characters}.{3 random characters}",Control_RunDLL
  • If executed with administrative rights:
    • "%System%\{random characters}\{random characters}.{3 random characters}",{random characters}
    • "%System%\{random characters}\{random characters}.{3 random characters}",Control_RunDLL

(Note: %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).. %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)

Other System Modifications

This Trojan Spy adds the following registry entries:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\{random characters}.{3 random characters}
ImagePath = %System%\rundll32.exe "%System%\{random characters}.{3 random characters}",{random characters}

Other Details

This Trojan Spy adds the following registry keys:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\{random characters}.{3 random characters}

It connects to the following possibly malicious URL:

  • http://{BLOCKED}.{BLOCKED}.61.60:443
  • http://{BLOCKED}.{BLOCKED}.250.14:80
  • http://{BLOCKED}.{BLOCKED}.33.48:8080
  • http://{BLOCKED}.{BLOCKED}.98.190:8080
  • http://{BLOCKED}.{BLOCKED}.80.14:7080
  • http://{BLOCKED}.{BLOCKED}.242.234:8080
  • http://{BLOCKED}.{BLOCKED}.169.10:8080
  • http://{BLOCKED}.{BLOCKED}.219.173:8080
  • http://{BLOCKED}.{BLOCKED}.209.141:8080
  • http://{BLOCKED}.{BLOCKED}.103.16:80
  • http://{BLOCKED}.{BLOCKED}.242.185:443
  • http://{BLOCKED}.{BLOCKED}.67.203:8080
  • http://{BLOCKED}.{BLOCKED}.228.122:443
  • http://{BLOCKED}.{BLOCKED}.81.119:8080
  • http://{BLOCKED}.{BLOCKED}.239.39:8080
  • http://{BLOCKED}.{BLOCKED}.57.149:443
  • http://{BLOCKED}.{BLOCKED}.146.35:443

It deletes the initially executed copy of itself.