Overview

overview

10

Static

static

10

forvm.exe

windows7_x64

10

forvm.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    150s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    18-06-2022 20:55

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General

  • Target

    forvm.exe

  • Size

    37KB

  • MD5

    1c34d0c6964ad975af3dd63fa9282e2e

  • SHA1

    4b1a295f48590c84880a458bbedeafc1512641ee

  • SHA256

    dde7dcf2831fc86f74315f05353ed60908fda5e8c8f2620fe160d63b266db471

  • SHA512

    8b8d5f608c87c8c9ce7a3d1571b77e2f2962b2ac332b474467fddd43902e9a56d1af4eadd5976caa6237c57a691b02f44d96ef2bd436b9e092c569185e9af5d5

Score
10/10
evasionpersistencesuricata

Malware Config

Signatures

  • suricata: ET MALWARE Generic njRAT/Bladabindi CnC Activity (ll)

    suricata: ET MALWARE Generic njRAT/Bladabindi CnC Activity (ll)

    suricata
  • suricata: ET MALWARE njrat ver 0.7d Malware CnC Callback (Capture)

    suricata: ET MALWARE njrat ver 0.7d Malware CnC Callback (Capture)

    suricata
  • Executes dropped EXE 1 IoCs
  • Modifies Windows Firewall 1 TTPs 1 IoCs
    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 use of AdjustPrivilegeToken 35 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\forvm.exe
    "C:\Users\Admin\AppData\Local\Temp\forvm.exe"
    1⤵
    • Checks computer location settings
    • Drops startup file
    • Adds Run key to start application
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4204
    • C:\Windows\SysWOW64\netsh.exe
      netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\forvm.exe" "forvm.exe" ENABLE
      2⤵
      • Modifies Windows Firewall
      PID:3460
    • C:\Users\Admin\AppData\Local\Temp\tmpC474.tmp.exe
      "C:\Users\Admin\AppData\Local\Temp\tmpC474.tmp.exe"
      2⤵
      • Executes dropped EXE
      PID:2284

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Modify Existing Service

1
T1031

Registry Run Keys / Startup Folder

1
T1060

Privilege Escalation

Defense Evasion

Modify Registry

1
T1112

Credential Access

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmpC474.tmp.exe
    Filesize

    53KB

    MD5

    d0a314fbbc8e3932366190b80d3a1d43

    SHA1

    9f5acdce5c4be66bce4d36d30dc0cc28cc607269

    SHA256

    b59b98e49c5a393691d1766623992d7b998b61a4f4420769c1431963146fdf6b

    SHA512

    15cda90b5bcd668b28a165cd83a165cb709b76cfcca21bd7918f6693022f93bafcb930dbbc8504c1ec9f47baa828ae47c58cf38b04ac1ec83911d126fe443d64

    Download Submit
  • C:\Users\Admin\AppData\Local\Temp\tmpC474.tmp.exe
    Filesize

    53KB

    MD5

    d0a314fbbc8e3932366190b80d3a1d43

    SHA1

    9f5acdce5c4be66bce4d36d30dc0cc28cc607269

    SHA256

    b59b98e49c5a393691d1766623992d7b998b61a4f4420769c1431963146fdf6b

    SHA512

    15cda90b5bcd668b28a165cd83a165cb709b76cfcca21bd7918f6693022f93bafcb930dbbc8504c1ec9f47baa828ae47c58cf38b04ac1ec83911d126fe443d64

    Download Submit
  • memory/2284-133-0x0000000000000000-mapping.dmp
    Download
  • memory/2284-136-0x0000000000E00000-0x0000000000E14000-memory.dmp
    Filesize

    80KB

    Download
  • memory/2284-137-0x0000000005D80000-0x0000000006324000-memory.dmp
    Filesize

    5.6MB

    Download
  • memory/2284-138-0x00000000057D0000-0x0000000005862000-memory.dmp
    Filesize

    584KB

    Download
  • memory/2284-139-0x0000000005960000-0x000000000596A000-memory.dmp
    Filesize

    40KB

    Download
  • memory/3460-131-0x0000000000000000-mapping.dmp
    Download
  • memory/4204-130-0x00000000751E0000-0x0000000075791000-memory.dmp
    Filesize

    5.7MB

    Download
  • memory/4204-132-0x00000000751E0000-0x0000000075791000-memory.dmp
    Filesize

    5.7MB

    Download