General

  • Target

    toolspub1.exe

  • Size

    204KB

  • Sample

    240115-f94aasbcc8

  • MD5

    1312fc2e043e2347c3de8a9a6907c430

  • SHA1

    075a04bc32a70aeedb23ee83842dd32fe691ba58

  • SHA256

    4b3f4607405154b8182848324699427778605dd52afabaff7a0fd542a4bc9212

  • SHA512

    108be06b849ded957240b52b006961f4bb01a9684ac0f2a81d70008f9b3a6cf1c2ee657cfe5ea6f566772735dabbc1c505342f37df6985296ddcebf3e917694f

  • SSDEEP

    3072:EkI0nM3Jq/AmlEkJiAj1K/2stqLiP+k9IYBn7Q97fsRLx8yM+cmk:EkICXlETZ2kx7QoxJcL

Malware Config

Extracted

Family

smokeloader

Botnet

pub1

Extracted

Family

smokeloader

Version

2020

C2

http://host-file-host6.com/

http://host-host-file8.com/

rc4.i32
rc4.i32

Targets

    • Target

      toolspub1.exe

    • Size

      204KB

    • MD5

      1312fc2e043e2347c3de8a9a6907c430

    • SHA1

      075a04bc32a70aeedb23ee83842dd32fe691ba58

    • SHA256

      4b3f4607405154b8182848324699427778605dd52afabaff7a0fd542a4bc9212

    • SHA512

      108be06b849ded957240b52b006961f4bb01a9684ac0f2a81d70008f9b3a6cf1c2ee657cfe5ea6f566772735dabbc1c505342f37df6985296ddcebf3e917694f

    • SSDEEP

      3072:EkI0nM3Jq/AmlEkJiAj1K/2stqLiP+k9IYBn7Q97fsRLx8yM+cmk:EkICXlETZ2kx7QoxJcL

    • BetaBot

      Beta Bot is a Trojan that infects computers and disables Antivirus.

    • Modifies firewall policy service

    • Modifies security service

    • SmokeLoader

      Modular backdoor trojan in use since 2014.

    • Disables taskbar notifications via registry modification

    • Disables use of System Restore points

    • Sets file execution options in registry

    • Sets service image path in registry

    • Checks BIOS information in registry

      BIOS information is often read in order to detect sandboxing environments.

    • Checks computer location settings

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

    • Deletes itself

    • Executes dropped EXE

    • Loads dropped DLL

    • Adds Run key to start application

    • Checks for any installed AV software in registry

    • Checks whether UAC is enabled

    • Drops desktop.ini file(s)

    • Suspicious use of NtSetInformationThreadHideFromDebugger

MITRE ATT&CK Matrix ATT&CK v13

Execution

Scheduled Task/Job

1
T1053

Persistence

Create or Modify System Process

2
T1543

Windows Service

2
T1543.003

Boot or Logon Autostart Execution

3
T1547

Registry Run Keys / Startup Folder

3
T1547.001

Scheduled Task/Job

1
T1053

Privilege Escalation

Create or Modify System Process

2
T1543

Windows Service

2
T1543.003

Boot or Logon Autostart Execution

3
T1547

Registry Run Keys / Startup Folder

3
T1547.001

Scheduled Task/Job

1
T1053

Defense Evasion

Modify Registry

8
T1112

Discovery

Query Registry

6
T1012

System Information Discovery

7
T1082

Software Discovery

1
T1518

Security Software Discovery

1
T1518.001

Peripheral Device Discovery

1
T1120

Impact

Inhibit System Recovery

1
T1490

Tasks