Overview

overview

10

Static

static

10

b1dd75efa7...74.exe

windows7-x64

10

b1dd75efa7...74.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    140s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240611-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
  • submitted
    19-06-2024 01:40

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General

  • Target

    b1dd75efa7ba920522bd4bfe4a3e5d08138bfc548faff601206b0cc56c9bb674.exe

  • Size

    70KB

  • MD5

    bdf4fc15d73d750fb764b52da65d6ab4

  • SHA1

    51aa0638430b6341498b65a877d1e0940064f1fc

  • SHA256

    b1dd75efa7ba920522bd4bfe4a3e5d08138bfc548faff601206b0cc56c9bb674

  • SHA512

    74b3c5f641b289236189bb38871c1e3962f70a172d1e52dedcf020fe8b843ca9f7ec3591726869fafa12745b61349c8b4807c46c3e6c00b26d9596efbf0d7a29

  • SSDEEP

    1536:eclu3E0ty5RM6Esc4m6cq1ZebmaL4UnpCdsfV1YADir+6S:ju3NURAscOx7wpCKznz

Score
10/10
dharmadefense_evasionexecutionimpactpersistenceransomwarespywarestealerupx

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Info.hta

Ransom Note
All your files have been encrypted! All your files have been encrypted due to a security problem with your PC. If you want to restore them, write us to the e-mail [email protected] Write this ID in the title of your message 841E4ECE In case of no answer in 24 hours write us to theese e-mails: [email protected] You have to pay for decryption in Bitcoins. The price depends on how fast you write to us. After payment we will send you the decryption tool that will decrypt all your files. Free decryption as guarantee Before paying you can send us up to 1 file for free decryption. The total size of files must be less than 1Mb (non archived), and files should not contain valuable information. (databases,backups, large excel sheets, etc.) How to obtain Bitcoins The easiest way to buy bitcoins is LocalBitcoins site. You have to register, click 'Buy bitcoins', and select the seller by payment method and price. https://localbitcoins.com/buy_bitcoins Also you can find other places to buy Bitcoins and beginners guide here: http://www.coindesk.com/information/how-can-i-buy-bitcoins/ Attention! Do not rename encrypted files. Do not try to decrypt your data using third party software, it may cause permanent data loss. Decryption of your files with the help of third parties may cause increased price (they add their fee to our) or you can become a victim of a scam.

Signatures

  • Dharma

    Dharma is a ransomware that uses security software installation to hide malicious activities.

    ransomwaredharma
  • Deletes shadow copies 3 TTPs

    Ransomware often targets backup files to inhibit system recovery.

    ransomwaredefense_evasionimpactexecution
  • Detects win.dharma. 1 IoCs
  • Identifies DHARMA ransomware 4 IoCs
  • Renames multiple (724) files with added filename extension

    This suggests ransomware activity of encrypting all the files on the system.

    ransomware
  • UPX dump on OEP (original entry point) 2 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Drops startup file 5 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

    spywarestealer
  • UPX packed file 2 IoCs

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

    upx
  • Adds Run key to start application 2 TTPs 3 IoCs
    persistence
  • Drops desktop.ini file(s) 64 IoCs
  • Drops file in System32 directory 2 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Interacts with shadow copies 3 TTPs 2 IoCs

    Shadow copies are often targeted by ransomware to inhibit system recovery.

    ransomware
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 16 IoCs
  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

    ransomware

Processes

  • C:\Users\Admin\AppData\Local\Temp\b1dd75efa7ba920522bd4bfe4a3e5d08138bfc548faff601206b0cc56c9bb674.exe
    "C:\Users\Admin\AppData\Local\Temp\b1dd75efa7ba920522bd4bfe4a3e5d08138bfc548faff601206b0cc56c9bb674.exe"
    1⤵
    • Checks computer location settings
    • Drops startup file
    • Adds Run key to start application
    • Drops desktop.ini file(s)
    • Drops file in System32 directory
    • Drops file in Program Files directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:724
    • C:\Windows\system32\cmd.exe
      "C:\Windows\system32\cmd.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2640
      • C:\Windows\system32\mode.com
        mode con cp select=1251
        3⤵
          PID:4348
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          3⤵
          • Interacts with shadow copies
          PID:7972
      • C:\Windows\system32\cmd.exe
        "C:\Windows\system32\cmd.exe"
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:8092
        • C:\Windows\system32\mode.com
          mode con cp select=1251
          3⤵
            PID:7308
          • C:\Windows\system32\vssadmin.exe
            vssadmin delete shadows /all /quiet
            3⤵
            • Interacts with shadow copies
            PID:6760
        • C:\Windows\System32\mshta.exe
          "C:\Windows\System32\mshta.exe" "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Info.hta"
          2⤵
            PID:7980
          • C:\Windows\System32\mshta.exe
            "C:\Windows\System32\mshta.exe" "C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Startup\Info.hta"
            2⤵
              PID:4404
          • C:\Windows\system32\vssvc.exe
            C:\Windows\system32\vssvc.exe
            1⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:5420
          • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
            "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=1304,i,8660989700097327804,17931739887231169645,262144 --variations-seed-version --mojo-platform-channel-handle=4156 /prefetch:8
            1⤵
              PID:6788

            Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

            • C:\Program Files\Common Files\microsoft shared\ClickToRun\AppvIsvSubsystems64.dll.id-841E4ECE.[[email protected]].boost
              Filesize

              3.2MB

              MD5

              163418a27491f8e83215d2d1f3124573

              SHA1

              015740c1267fb5bd62b5f8b51d71cf4dfda86005

              SHA256

              880baae247a10ed6a0a7ac0a43a9104e6a3ea0fc394829012691b04ad4a51b52

              SHA512

              5b958c3abd649bab7272198067223f0b34ad76cab4e1d4d16d8a7b3b80182ba4c007d52bca768d4888ebf8145f8060c3f4ee550b9f312197a0cad0750e87314c

              Download Submit

            • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Info.hta
              Filesize

              13KB

              MD5

              cdc7fcc3a9d52e500984b890a8d7189e

              SHA1

              6ca938527c803d78c3b6c9eadf16cb92a4d9ea7a

              SHA256

              4db94c2043a72c76b09e447e71b6d17d23be69627738278dfb76a780f200be3c

              SHA512

              3ab370d09188881d069464eb291e4e5b5214ec54673299fd56bca6e2a051496adfc22793f07c8f18e7dedd7b29736d7e1568330c13f1f56addc51d48add2d385

              Download Submit

            • memory/724-0-0x0000000000400000-0x000000000041D000-memory.dmp

              Filesize

              116KB

              Download

            • memory/724-19992-0x0000000000400000-0x000000000041D000-memory.dmp

              Filesize

              116KB

              Download