Overview

overview

8

Static

static

3

f3858bcfed...ad.exe

windows7-x64

8

f3858bcfed...ad.exe

windows10-2004-x64

8

Analysis

  • max time kernel
    151s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28-04-2024 03:18

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General

  • Target

    f3858bcfedbe4a25e9e1ce676aabac078c86c53b8e37d324fb3f6ee1e6ee8cad.exe

  • Size

    404KB

  • MD5

    5e9ede719992be7ca1eccfdb5c3c2e93

  • SHA1

    83ac96f59be3a154727f6b590ed8f37547cd4243

  • SHA256

    f3858bcfedbe4a25e9e1ce676aabac078c86c53b8e37d324fb3f6ee1e6ee8cad

  • SHA512

    83f763e426e6474b0a7870889644c1275e5a2f7749214875f36342aa67428e577b31a4e97e6226470bccd9f8f06c30de76471c1f18f8d981522ec0e1197055e9

  • SSDEEP

    6144:3w9D91dOrcN3ZGXNYFNmIkYvUIelVjjVtGRyFH4:gtRfJcNYFNm8UhlZGse

Score
8/10
bootkitpersistencespywarestealer

Malware Config

Signatures

  • Blocklisted process makes network request 8 IoCs
  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

    spywarestealer
  • Adds Run key to start application 2 TTPs 1 IoCs
    persistence
  • Enumerates connected drives 3 TTPs 2 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

    Bootkits write to the MBR to gain persistence at a level below the operating system.

    bootkitpersistence
  • Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
  • Drops file in Program Files directory 2 IoCs
  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\f3858bcfedbe4a25e9e1ce676aabac078c86c53b8e37d324fb3f6ee1e6ee8cad.exe
    "C:\Users\Admin\AppData\Local\Temp\f3858bcfedbe4a25e9e1ce676aabac078c86c53b8e37d324fb3f6ee1e6ee8cad.exe"
    1⤵
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2136
    • C:\Windows\SysWOW64\cmd.exe
      cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\jesta.exe "C:\Users\Admin\AppData\Local\Temp\f3858bcfedbe4a25e9e1ce676aabac078c86c53b8e37d324fb3f6ee1e6ee8cad.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4820
      • C:\Windows\SysWOW64\PING.EXE
        ping 127.0.0.1 -n 2
        3⤵
        • Runs ping.exe
        PID:3012
      • C:\Users\Admin\AppData\Local\Temp\jesta.exe
        C:\Users\Admin\AppData\Local\Temp\\jesta.exe "C:\Users\Admin\AppData\Local\Temp\f3858bcfedbe4a25e9e1ce676aabac078c86c53b8e37d324fb3f6ee1e6ee8cad.exe"
        3⤵
        • Deletes itself
        • Executes dropped EXE
        • Drops file in Program Files directory
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:1140
        • \??\c:\windows\SysWOW64\rundll32.exe
          c:\windows\system32\rundll32.exe "c:\Program Files\zwnjm\enmeenau.dll",Verify C:\Users\Admin\AppData\Local\Temp\jesta.exe
          4⤵
          • Blocklisted process makes network request
          • Loads dropped DLL
          • Adds Run key to start application
          • Enumerates connected drives
          • Writes to the Master Boot Record (MBR)
          • Suspicious use of NtSetInformationThreadHideFromDebugger
          • Checks processor information in registry
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:2964
  • 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 --no-appcompat-clear --mojo-platform-channel-handle=3724 --field-trial-handle=2292,i,2103142837140538807,15881446839139365070,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:4812

    Network

    MITRE ATT&CK Matrix ATT&CK v13

    Initial Access

    Execution

    Persistence

    Boot or Logon Autostart Execution

    1
    T1547

    Registry Run Keys / Startup Folder

    1
    T1547.001

    Pre-OS Boot

    1
    T1542

    Bootkit

    1
    T1542.003

    Privilege Escalation

    Boot or Logon Autostart Execution

    1
    T1547

    Registry Run Keys / Startup Folder

    1
    T1547.001

    Defense Evasion

    Modify Registry

    1
    T1112

    Pre-OS Boot

    1
    T1542

    Bootkit

    1
    T1542.003

    Credential Access

    Unsecured Credentials

    1
    T1552

    Credentials In Files

    1
    T1552.001

    Discovery

    Query Registry

    2
    T1012

    Peripheral Device Discovery

    1
    T1120

    System Information Discovery

    2
    T1082

    Remote System Discovery

    1
    T1018

    Lateral Movement

    Collection

    Data from Local System

    1
    T1005

    Exfiltration

    Command and Control

    Impact

    Resource Development

    Reconnaissance

    Replay Monitor

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    Downloads

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

      404KB

      MD5

      b511fdc792b8bf26960cdb21aebc0220

      SHA1

      431fe47d666325f6f73b5f2e11837a41a4269c3c

      SHA256

      d13cb1ba1f63694bfa56b55429a02fc94ba0103b674e39331b10c71ae04f6ef2

      SHA512

      7bb489f568907e6a68e0e204542af7f09715bc32da6b96eaa592b9fa8adbd1f3f8a935fa3885330081427c48d94f6f996e118828bbb2fa36e4794213026549e6

      Download Submit
    • \??\c:\Program Files\zwnjm\enmeenau.dll
      Filesize

      228KB

      MD5

      fcf87ec62b88d68172362742a8e3380e

      SHA1

      91e088b0db26c87fea870ff90814eb0a06fda274

      SHA256

      771b61c3caa96ed9b1622df8083d8f2730fb9536569bac7a0fa089779408c290

      SHA512

      2804c48b2b84fd026c3b603900b788a193e3b6b08884bdd3a2057c57f70b27173936a36cd30b7989d45d20ab41916b20a9ca85935468acb02646926f4d80997f

      Download Submit
    • memory/1140-7-0x0000000000400000-0x0000000000464000-memory.dmp
      Filesize

      400KB

      Download
    • memory/2136-0-0x0000000000400000-0x0000000000464000-memory.dmp
      Filesize

      400KB

      Download
    • memory/2136-2-0x0000000000400000-0x0000000000464000-memory.dmp
      Filesize

      400KB

      Download
    • memory/2964-10-0x0000000010000000-0x0000000010080000-memory.dmp
      Filesize

      512KB

      Download
    • memory/2964-11-0x0000000010000000-0x0000000010080000-memory.dmp
      Filesize

      512KB

      Download
    • memory/2964-13-0x0000000010000000-0x0000000010080000-memory.dmp
      Filesize

      512KB

      Download