Overview

overview

10

Static

static

FastDownloader.exe

windows7_x64

8

FastDownloader.exe

windows10_x64

10

Sharing

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General

  • Target

    FastDownloader.exe

  • Size

    1.0MB

  • Sample

    210708-p5cm1q9bp6

  • MD5

    ce0abe6028bcff4777da9322c9451998

  • SHA1

    a8d277111e2801b7dea3a31f9d0d6f4a68f011f4

  • SHA256

    b35d15d82efffd1561d404c377d23c97fdacdfc90838b708364ecc0f7c1f2967

  • SHA512

    19f57334c737fd7572e2f15b55c2cd5bba33f8e5d6632346b1f0908b1dcb46c66847cee1b8d7b35eb5243431fc61847a8227f978927a0eb4bdb7767cfa67cb1f

Score
10/10
bootkitdiscoverypersistence

Malware Config

Targets

    • Target

      FastDownloader.exe

    • Size

      1.0MB

    • MD5

      ce0abe6028bcff4777da9322c9451998

    • SHA1

      a8d277111e2801b7dea3a31f9d0d6f4a68f011f4

    • SHA256

      b35d15d82efffd1561d404c377d23c97fdacdfc90838b708364ecc0f7c1f2967

    • SHA512

      19f57334c737fd7572e2f15b55c2cd5bba33f8e5d6632346b1f0908b1dcb46c66847cee1b8d7b35eb5243431fc61847a8227f978927a0eb4bdb7767cfa67cb1f

    Score
    10/10
    bootkitdiscoverypersistence

    • Modifies system executable filetype association

      persistence

    • Registers COM server for autorun

      persistence

    • Downloads MZ/PE file

    • Executes dropped EXE

    • Sets DLL path for service in the registry

      persistence

    • Sets service image path in registry

      persistence

    • Checks computer location settings

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

    • Loads dropped DLL

    • Checks for any installed AV software in registry

    • Checks installed software on the system

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

      discovery

    • Enumerates connected drives

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

    • Writes to the Master Boot Record (MBR)

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

      bootkitpersistence

    • Drops file in System32 directory

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    behavioral1behavioral2

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Change Default File Association

1
T1042

Registry Run Keys / Startup Folder

3
T1060

Bootkit

1
T1067

Privilege Escalation

Defense Evasion

Modify Registry

5
T1112

Install Root Certificate

1
T1130

Credential Access

Discovery

Query Registry

3
T1012

System Information Discovery

3
T1082

Security Software Discovery

1
T1063

Peripheral Device Discovery

1
T1120

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Tasks