Resubmissions

25-06-2021 19:43

210625-pqvqelznaa 10

17-01-2021 17:33

210117-2wt25r9nnj 10

17-01-2021 09:39

210117-slyd6hjnmx 10

General

  • Target

    Microsoft_Toolkit.exe

  • Size

    4.9MB

  • Sample

    210117-slyd6hjnmx

  • MD5

    ee287c2e51854fee07881638379c6f38

  • SHA1

    1dccecc235b6d702a8fea3350c72b9c52c05c7be

  • SHA256

    c3193806a082fa6c5c4b755e343c01dcf9169487acbf9150ab169d3972a8c6e8

  • SHA512

    02a1e9874f994e958489be409e3a6efcce642c57b9f5e50de0a2072ad15769cdb717744ed37436b0f9d94104572a79d39e6114938ba3e5a6670d6c05e780aafa

Malware Config

Extracted

Family

smokeloader

Version

2020

C2

http://oversun.monster/upload/

http://oversun.net/upload/

http://dingobossin.com/upload/

http://duda1.monster/upload/

http�//vinder55.monster/upload/

http://jamb2.monster/upload/

rc4.i32
rc4.i32

Targets

    • Target

      Microsoft_Toolkit.exe

    • Size

      4.9MB

    • MD5

      ee287c2e51854fee07881638379c6f38

    • SHA1

      1dccecc235b6d702a8fea3350c72b9c52c05c7be

    • SHA256

      c3193806a082fa6c5c4b755e343c01dcf9169487acbf9150ab169d3972a8c6e8

    • SHA512

      02a1e9874f994e958489be409e3a6efcce642c57b9f5e50de0a2072ad15769cdb717744ed37436b0f9d94104572a79d39e6114938ba3e5a6670d6c05e780aafa

    • Raccoon

      Simple but powerful infostealer which was very active in 2019.

    • SmokeLoader

      Modular backdoor trojan in use since 2014.

    • Executes dropped EXE

    • UPX packed file

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

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • 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.

    • 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

    • 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.

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

2
T1081

Discovery

Query Registry

3
T1012

System Information Discovery

3
T1082

Peripheral Device Discovery

1
T1120

Remote System Discovery

1
T1018

Collection

Data from Local System

2
T1005

Command and Control

Web Service

1
T1102

Tasks