Analysis

  • max time kernel
    147s
  • max time network
    143s
  • platform
    windows7_x64
  • resource
    win7-en-20210920
  • submitted
    12-10-2021 10:45

General

  • Target

    dllhost.exe

  • Size

    485KB

  • MD5

    1fe73fe4d37cae6a02262b5164f3def0

  • SHA1

    80b03eb27651723bded1fd1425f489225b3bba3b

  • SHA256

    0c33fe39195569a868cf9f87d3aff16e72f5a54c4e52a852b8f986d121fa47e8

  • SHA512

    7416dadb6e85cc43000bba33f47797cf7e5fe5ee0c9f8639685130264a867b6048839d2b74ca3e00b00caf8a1dcf83d08f01901c56ab9343888d62501c48d2b6

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

kzk9

C2

http://www.yourmajordomo.com/kzk9/

Decoy

tianconghuo.club

1996-page.com

ourtownmax.net

conservativetreehose.com

synth.repair

donnachicacreperia.com

tentfull.com

weapp.download

surfersink.com

gattlebusinessservices.com

sebastian249.com

anhphuc.company

betternatureproducts.net

defroplate.com

seattlesquidsquad.com

polarjob.com

lendingadvantage.com

angelsondope.com

goportjitney.com

tiendagrupojagr.com

Signatures

  • Formbook

    Formbook is a data stealing malware which is capable of stealing data.

  • Formbook Payload ⋅ 3 IoCs
  • Deletes itself ⋅ 1 IoCs
  • Suspicious use of SetThreadContext ⋅ 3 IoCs
  • Suspicious behavior: EnumeratesProcesses ⋅ 28 IoCs
  • Suspicious behavior: MapViewOfSection ⋅ 5 IoCs
  • Suspicious use of AdjustPrivilegeToken ⋅ 3 IoCs
  • Suspicious use of FindShellTrayWindow ⋅ 2 IoCs
  • Suspicious use of SendNotifyMessage ⋅ 2 IoCs
  • Suspicious use of WriteProcessMemory ⋅ 15 IoCs

Processes

  • C:\Windows\Explorer.EXE
    C:\Windows\Explorer.EXE
    Suspicious use of FindShellTrayWindow
    Suspicious use of SendNotifyMessage
    Suspicious use of WriteProcessMemory
    PID:1244
    • C:\Users\Admin\AppData\Local\Temp\dllhost.exe
      "C:\Users\Admin\AppData\Local\Temp\dllhost.exe"
      Suspicious use of SetThreadContext
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:1324
      • C:\Users\Admin\AppData\Local\Temp\dllhost.exe
        "C:\Users\Admin\AppData\Local\Temp\dllhost.exe"
        Suspicious use of SetThreadContext
        Suspicious behavior: EnumeratesProcesses
        Suspicious behavior: MapViewOfSection
        Suspicious use of AdjustPrivilegeToken
        PID:1036
    • C:\Windows\SysWOW64\colorcpl.exe
      "C:\Windows\SysWOW64\colorcpl.exe"
      Suspicious use of SetThreadContext
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: MapViewOfSection
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:1300
      • C:\Windows\SysWOW64\cmd.exe
        /c del "C:\Users\Admin\AppData\Local\Temp\dllhost.exe"
        Deletes itself
        PID:1016

Network

MITRE ATT&CK Matrix

Collection

    Command and Control

      Credential Access

        Defense Evasion

          Discovery

            Execution

              Exfiltration

                Impact

                  Initial Access

                    Lateral Movement

                      Persistence

                        Privilege Escalation

                          Replay Monitor

                          00:00 00:00

                          Downloads

                          • memory/1016-72-0x0000000000000000-mapping.dmp
                          • memory/1036-65-0x0000000000A70000-0x0000000000D73000-memory.dmp
                          • memory/1036-66-0x00000000001D0000-0x00000000001E4000-memory.dmp
                          • memory/1036-60-0x0000000000400000-0x000000000042E000-memory.dmp
                          • memory/1036-61-0x0000000000400000-0x000000000042E000-memory.dmp
                          • memory/1036-62-0x0000000000400000-0x000000000042E000-memory.dmp
                          • memory/1036-63-0x000000000041EB80-mapping.dmp
                          • memory/1244-75-0x00000000062B0000-0x00000000063D1000-memory.dmp
                          • memory/1244-67-0x0000000004AB0000-0x0000000004B87000-memory.dmp
                          • memory/1300-68-0x0000000000000000-mapping.dmp
                          • memory/1300-70-0x0000000000BA0000-0x0000000000BB8000-memory.dmp
                          • memory/1300-71-0x0000000000080000-0x00000000000AE000-memory.dmp
                          • memory/1300-73-0x0000000001FC0000-0x00000000022C3000-memory.dmp
                          • memory/1300-74-0x0000000000890000-0x0000000000923000-memory.dmp
                          • memory/1324-59-0x0000000004C00000-0x0000000004C50000-memory.dmp
                          • memory/1324-58-0x0000000000440000-0x0000000000445000-memory.dmp
                          • memory/1324-54-0x0000000000120000-0x0000000000121000-memory.dmp
                          • memory/1324-57-0x0000000004BC0000-0x0000000004BC1000-memory.dmp
                          • memory/1324-56-0x0000000075661000-0x0000000075663000-memory.dmp