General

  • Target

    f91e59f60b96583ba0523eae19390204.exe

  • Size

    137KB

  • Sample

    201229-q5g87z8416

  • MD5

    f91e59f60b96583ba0523eae19390204

  • SHA1

    7a21c5d05d050c45492b35b67e0f76de31c0843b

  • SHA256

    c2fb724acbf58e1196bc979ddc11e835baa40797c62ac88ac0e5b3f51f829176

  • SHA512

    0785907fbb61837c400f0bf74e6b0ebe54523c9054886556e47181075d9126438667835a0efecd8164a48668e4e73f2e62ca7c08a523029d5711325ab8304518

Malware Config

Extracted

Family

smokeloader

Version

2020

C2

http://vtdilet.com/upload/

http://netvxi.com/upload/

http://tinnys.monster/upload/

rc4.i32
rc4.i32

Targets

    • Target

      f91e59f60b96583ba0523eae19390204.exe

    • Size

      137KB

    • MD5

      f91e59f60b96583ba0523eae19390204

    • SHA1

      7a21c5d05d050c45492b35b67e0f76de31c0843b

    • SHA256

      c2fb724acbf58e1196bc979ddc11e835baa40797c62ac88ac0e5b3f51f829176

    • SHA512

      0785907fbb61837c400f0bf74e6b0ebe54523c9054886556e47181075d9126438667835a0efecd8164a48668e4e73f2e62ca7c08a523029d5711325ab8304518

    • AgentTesla

      Agent Tesla is a remote access tool (RAT) written in visual basic.

    • Raccoon

      Simple but powerful infostealer which was very active in 2019.

    • SmokeLoader

      Modular backdoor trojan in use since 2014.

    • AgentTesla Payload

    • Executes dropped EXE

    • UPX packed file

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

    • Deletes itself

    • 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.

    • Checks installed software on the system

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

    • JavaScript code in executable

MITRE ATT&CK Matrix ATT&CK v6

Defense Evasion

Install Root Certificate

1
T1130

Modify Registry

1
T1112

Credential Access

Credentials in Files

2
T1081

Discovery

Query Registry

2
T1012

Peripheral Device Discovery

1
T1120

System Information Discovery

1
T1082

Collection

Data from Local System

2
T1005

Tasks