Resubmissions

28-11-2020 13:51

201128-na772gae2e 10

General

  • Target

    4e759849412063c6590936671ce4aa0e.exe

  • Size

    7.6MB

  • Sample

    201128-na772gae2e

  • MD5

    4e759849412063c6590936671ce4aa0e

  • SHA1

    40d132516cc4b9aa00dca2b2f068c439cf8f59c3

  • SHA256

    7a79f0c95e891b939e275fa19e641b676f2eb70471945fb3b15d6a649cafe071

  • SHA512

    636f2e0049eab66d31a07446dbd9a747931c2ee8954b9878a7133c783e530eeba7b45060ad3bcf2f7e70c96fac4b680650c6c501aabb48cdfe98457535297e91

Malware Config

Extracted

Family

smokeloader

Version

2020

C2

http://naritouzina.net/

http://nukaraguasleep.net/

http://notfortuaj.net/

http://natuturalistic.net/

http://zaniolofusa.net/

rc4.i32
rc4.i32

Targets

    • Target

      4e759849412063c6590936671ce4aa0e.exe

    • Size

      7.6MB

    • MD5

      4e759849412063c6590936671ce4aa0e

    • SHA1

      40d132516cc4b9aa00dca2b2f068c439cf8f59c3

    • SHA256

      7a79f0c95e891b939e275fa19e641b676f2eb70471945fb3b15d6a649cafe071

    • SHA512

      636f2e0049eab66d31a07446dbd9a747931c2ee8954b9878a7133c783e530eeba7b45060ad3bcf2f7e70c96fac4b680650c6c501aabb48cdfe98457535297e91

    • PlugX

      PlugX is a RAT (Remote Access Trojan) that has been around since 2008.

    • SmokeLoader

      Modular backdoor trojan in use since 2014.

    • ServiceHost packer

      Detects ServiceHost packer used for .NET malware

    • Executes dropped EXE

    • Suspicious Office macro

      Office document equipped with 4.0 macros.

    • UPX packed file

      Detects executables packed with UPX/modified UPX open source packer.

    • Loads dropped DLL

    • Reads user/profile data of local email clients

      Email clients store some user data on disk where infostealers will often target it.

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • Accesses 2FA software files, possible credential harvesting

    • Accesses cryptocurrency files/wallets, possible credential harvesting

    • Adds Run key to start application

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

    • Checks whether UAC is enabled

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

    • JavaScript code in executable

    • Legitimate hosting services abused for malware hosting/C2

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Writes to the Master Boot Record (MBR)

      Bootkits write to the MBR to gain persistence at a level below the operating system.

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

1
T1060

Bootkit

1
T1067

Defense Evasion

Modify Registry

3
T1112

Install Root Certificate

1
T1130

Credential Access

Credentials in Files

4
T1081

Discovery

Query Registry

4
T1012

System Information Discovery

4
T1082

Peripheral Device Discovery

2
T1120

Remote System Discovery

1
T1018

Collection

Data from Local System

4
T1005

Command and Control

Web Service

1
T1102

Tasks