Overview

overview

10

Static

static

580fc5cd72...d0.exe

windows7_x64

10

580fc5cd72...d0.exe

windows10_x64

10

Sharing

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General

  • Target

    580fc5cd72d7979040fa1c4866ada3d0.exe

  • Size

    343KB

  • Sample

    211019-l1w3hsffc5

  • MD5

    580fc5cd72d7979040fa1c4866ada3d0

  • SHA1

    7da202d99be94f57f355c611bafde9656bca65b7

  • SHA256

    42e7ef551c652a5e6f0ff919fcb53cd2c34682006cb1436295205a41abec6589

  • SHA512

    b1be0be516e0d36c4b2e2f9e82e5cd94fecc86c39a4eee4494174f55e319a4c72d529e2aa097d3d466c5613df4106624fd689e6a1441e6be4a7bf9a15dc44815

Score
10/10
servhelpersmokeloaderbackdoordiscoveryexploitpersistencetrojanupx

Malware Config

Extracted

Language
ps1
Deobfuscated
URLs
ps1.dropper

https://raw.githubusercontent.com/sqlitey/sqlite/master/speed.ps1

Extracted

Family

smokeloader

Version

2020

C2

http://directorycart.com/upload/

http://tierzahnarzt.at/upload/

http://streetofcards.com/upload/

http://ycdfzd.com/upload/

http://successcoachceo.com/upload/

http://uhvu.cn/upload/

http://japanarticle.com/upload/
rc4.i32
rc4.i32

Targets

    • Target

      580fc5cd72d7979040fa1c4866ada3d0.exe

    • Size

      343KB

    • MD5

      580fc5cd72d7979040fa1c4866ada3d0

    • SHA1

      7da202d99be94f57f355c611bafde9656bca65b7

    • SHA256

      42e7ef551c652a5e6f0ff919fcb53cd2c34682006cb1436295205a41abec6589

    • SHA512

      b1be0be516e0d36c4b2e2f9e82e5cd94fecc86c39a4eee4494174f55e319a4c72d529e2aa097d3d466c5613df4106624fd689e6a1441e6be4a7bf9a15dc44815

    Score
    10/10
    servhelpersmokeloaderbackdoordiscoveryexploitpersistencetrojanupx

    • ServHelper

      ServHelper is a backdoor written in Delphi and is associated with the hacking group TA505.

      trojanbackdoorservhelper

    • SmokeLoader

      Modular backdoor trojan in use since 2014.

      trojanbackdoorsmokeloader

    • Grants admin privileges

      Uses net.exe to modify the user's privileges.

    • Blocklisted process makes network request

    • Downloads MZ/PE file

    • Executes dropped EXE

    • Modifies RDP port number used by Windows

    • Possible privilege escalation attempt

      exploit

    • Sets DLL path for service in the registry

      persistence

    • UPX packed file

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

      upx

    • Deletes itself

    • Loads dropped DLL

    • Modifies file permissions

      discovery

    • Drops file in System32 directory

    behavioral1behavioral2

MITRE ATT&CK Enterprise v6

Tasks