Overview

overview

10

Static

static

10

999e3e7984...05.exe

windows7_x64

10

999e3e7984...05.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    153s
  • max time network
    179s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    21-05-2022 00:10

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General

  • Target

    999e3e79844299f643e2addfc8b8142f090be16a56c287d73e97179085a91905.exe

  • Size

    203KB

  • MD5

    80ad24837a1502c5137eff0689879e87

  • SHA1

    5189989a7000c8b54164b5217b3813d5025ec72d

  • SHA256

    999e3e79844299f643e2addfc8b8142f090be16a56c287d73e97179085a91905

  • SHA512

    6ea82775a0c6d401b22e3ac267aa2345465d8e95529f650636e0d0dab9757d1eda6faafd5e0abcba585d1f430085ad686232189ee23da0ad20e0aaaf3ad30e07

Score
10/10
njratbiomusorevasionpersistencetrojan

Malware Config

Extracted

Family

njrat

Version

im523

Botnet

Biomusor

C2

valeraservice.hopto.org:3725

Mutex

c09891880ad4e747f696c8d81f2ec88b

Attributes
  • reg_key

    c09891880ad4e747f696c8d81f2ec88b

  • splitter

    |'|'|

Signatures

  • njRAT/Bladabindi

    Widely used RAT written in .NET.

    trojannjrat
  • Executes dropped EXE 1 IoCs
  • Modifies Windows Firewall 1 TTPs
    evasion
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Drops startup file 2 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
    persistence
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 29 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\999e3e79844299f643e2addfc8b8142f090be16a56c287d73e97179085a91905.exe
    "C:\Users\Admin\AppData\Local\Temp\999e3e79844299f643e2addfc8b8142f090be16a56c287d73e97179085a91905.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2900
    • C:\Users\Admin\AppData\Roaming\svchost.exe
      "C:\Users\Admin\AppData\Roaming\svchost.exe"
      2⤵
      • Executes dropped EXE
      • Drops startup file
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:4540
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall add allowedprogram "C:\Users\Admin\AppData\Roaming\svchost.exe" "svchost.exe" ENABLE
        3⤵
          PID:2896

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Roaming\svchost.exe
      Filesize

      203KB

      MD5

      80ad24837a1502c5137eff0689879e87

      SHA1

      5189989a7000c8b54164b5217b3813d5025ec72d

      SHA256

      999e3e79844299f643e2addfc8b8142f090be16a56c287d73e97179085a91905

      SHA512

      6ea82775a0c6d401b22e3ac267aa2345465d8e95529f650636e0d0dab9757d1eda6faafd5e0abcba585d1f430085ad686232189ee23da0ad20e0aaaf3ad30e07

      Download Submit

    • C:\Users\Admin\AppData\Roaming\svchost.exe
      Filesize

      203KB

      MD5

      80ad24837a1502c5137eff0689879e87

      SHA1

      5189989a7000c8b54164b5217b3813d5025ec72d

      SHA256

      999e3e79844299f643e2addfc8b8142f090be16a56c287d73e97179085a91905

      SHA512

      6ea82775a0c6d401b22e3ac267aa2345465d8e95529f650636e0d0dab9757d1eda6faafd5e0abcba585d1f430085ad686232189ee23da0ad20e0aaaf3ad30e07

      Download Submit

    • memory/2896-135-0x0000000000000000-mapping.dmp

      Download

    • memory/2900-130-0x0000000074B90000-0x0000000075141000-memory.dmp

      Filesize

      5.7MB

      Download

    • memory/4540-131-0x0000000000000000-mapping.dmp

      Download

    • memory/4540-134-0x0000000074B90000-0x0000000075141000-memory.dmp

      Filesize

      5.7MB

      Download