Overview

overview

10

Static

static

BILLING ST...DF.exe

windows7_x64

10

BILLING ST...DF.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    151s
  • max time network
    156s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    20-05-2022 13:23

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General

  • Target

    BILLING STATEMENT -AUGUST 2020.PDF.exe

  • Size

    1023KB

  • MD5

    3775ac940d19237a62423250306b271d

  • SHA1

    7012449e1235171eefb2cf0e5cb30146701eadd5

  • SHA256

    bd7123082ebc1bc656abbb0de0e4b2eac5d29d37e4497470d7e7be5a99e3fb25

  • SHA512

    53e8924c89838d6b638475336b3eb1eedd01ccc27bead38cd36892886e9296df4ffea4dee69558e95cb10917edf85a7a8db6d26f478d7d24b1713764b9034907

Score
10/10
remcosaugust-bless-mepersistenceratsuricata

Malware Config

Extracted

Family

remcos

Version

2.5.1 Pro

Botnet

AUGUST-BLESS-ME

C2

officer170.webredirect.org:2404

chidera12345.ddns.net:2404
Attributes
  • audio_folder

    MicRecords

  • audio_path

    %AppData%

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    remcos.exe

  • copy_folder

    remcos

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    false

  • install_flag

    false

  • install_path

    %AppData%

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • keylog_path

    %AppData%

  • mouse_option

    false

  • mutex

    Remcos-T7VXCL

  • screenshot_crypt

    false

  • screenshot_flag

    true

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    1

  • startup_value

    remcos

  • take_screenshot_option

    false

  • take_screenshot_time

    5

  • take_screenshot_title

    wikipedia;solitaire;

Signatures

  • Remcos

    Remcos is a closed-source remote control and surveillance software.

    ratremcos
  • suricata: ET MALWARE Remcos RAT Checkin 23

    suricata: ET MALWARE Remcos RAT Checkin 23

    suricata
  • Executes dropped EXE 3 IoCs
  • Checks computer location settings 2 TTPs 3 IoCs

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

  • Adds Run key to start application 2 TTPs 4 IoCs
    persistence
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\BILLING STATEMENT -AUGUST 2020.PDF.exe
    "C:\Users\Admin\AppData\Local\Temp\BILLING STATEMENT -AUGUST 2020.PDF.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1564
    • C:\71189588\wxut.pif
      "C:\71189588\wxut.pif" ombgmvign.qsf
      2⤵
      • Executes dropped EXE
      • Checks computer location settings
      • Adds Run key to start application
      • Modifies registry class
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:3228
      • C:\Windows\SysWOW64\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\71189588\run.vbs"
        3⤵
        • Checks computer location settings
        • Suspicious use of WriteProcessMemory
        PID:2272
        • C:\71189588\wxut.pif
          "C:\71189588\wxut.pif" ombgmvign.qsf
          4⤵
          • Executes dropped EXE
          • Adds Run key to start application
          • Suspicious use of SetThreadContext
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:4308
          • C:\Users\Admin\AppData\Local\Temp\RegSvcs.exe
            "C:\Users\Admin\AppData\Local\Temp\RegSvcs.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetWindowsHookEx
            PID:2068

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

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:\71189588\ombgmvign.qsf
    Filesize

    192.4MB

    MD5

    ed381ffca3192ee6af6800537155c2e1

    SHA1

    542f736593e2e8eea38a248c014311f2e9e790d7

    SHA256

    be42f42b66c7c1d0b1371c3db16408f99aabcfd97980bc4d621e834116c008a2

    SHA512

    439e3cc289283b6d3e5870f39fd585a722cf72529283fbd0b9c25c5017a4aa48f2769c74ea2bc84cf51785b7fcc45a15a6629730913272c58c093c9c132163f1

    Download Submit
  • C:\71189588\run.vbs
    Filesize

    90B

    MD5

    d73acc6db3425ba8543587214a6f6c30

    SHA1

    e319fe04dca21c9ff2e0d630d664e14af1b94657

    SHA256

    d3db41b90687b7d8577136c030ae54d5688077bbd35de2e2ae7f8b5fc8ac2c1a

    SHA512

    c58b0787eee705771fb934ceb00e19de36275ec291123e1e690b06b7a3b919e94c84b90fa4e95e80a1be67b7933fee01717f27f2194b1751aa6b03350fc022b3

    Download Submit
  • C:\71189588\tflbjoosws.bin
    Filesize

    312KB

    MD5

    264c07e27662260fb0e594d107e6f183

    SHA1

    e8d5097f3b325e9bc72ad90f2d50de6bcb2a5d20

    SHA256

    eb42b510e2a69f5bf1105f483aafde8d643c789c4bbedb235b64197ddb44d3b0

    SHA512

    73a789f46e5320c01094ab9025404c6cce5c0955821b9287032542d2569ec0c6ff8792f912c05ad247268391819a173ef71cd6ade66137542e1cc4a81040c66d

    Download Submit
  • C:\71189588\wxut.pif
    Filesize

    712KB

    MD5

    43e7db53ce5c130179aef5b47dcf7608

    SHA1

    5398e207d9ad301860b570d87601c1664ada9c0a

    SHA256

    9c04aab5734e2e0eea44af2584333ecc093b27ef36a586fb8873b5d4cadcd7f1

    SHA512

    a79f8094152f4f0cb5f0763bc4cdfdc9061af322dfee1bac043de0ac7581f2a7b35841924fe224ecc73b6bda1fba6811045e513d45e8f3598ca6ec313b7103f4

    Download Submit
  • C:\71189588\wxut.pif
    Filesize

    712KB

    MD5

    43e7db53ce5c130179aef5b47dcf7608

    SHA1

    5398e207d9ad301860b570d87601c1664ada9c0a

    SHA256

    9c04aab5734e2e0eea44af2584333ecc093b27ef36a586fb8873b5d4cadcd7f1

    SHA512

    a79f8094152f4f0cb5f0763bc4cdfdc9061af322dfee1bac043de0ac7581f2a7b35841924fe224ecc73b6bda1fba6811045e513d45e8f3598ca6ec313b7103f4

    Download Submit
  • C:\71189588\wxut.pif
    Filesize

    712KB

    MD5

    43e7db53ce5c130179aef5b47dcf7608

    SHA1

    5398e207d9ad301860b570d87601c1664ada9c0a

    SHA256

    9c04aab5734e2e0eea44af2584333ecc093b27ef36a586fb8873b5d4cadcd7f1

    SHA512

    a79f8094152f4f0cb5f0763bc4cdfdc9061af322dfee1bac043de0ac7581f2a7b35841924fe224ecc73b6bda1fba6811045e513d45e8f3598ca6ec313b7103f4

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

    44KB

    MD5

    9d352bc46709f0cb5ec974633a0c3c94

    SHA1

    1969771b2f022f9a86d77ac4d4d239becdf08d07

    SHA256

    2c1eeb7097023c784c2bd040a2005a5070ed6f3a4abf13929377a9e39fab1390

    SHA512

    13c714244ec56beeb202279e4109d59c2a43c3cf29f90a374a751c04fd472b45228ca5a0178f41109ed863dbd34e0879e4a21f5e38ae3d89559c57e6be990a9b

    Download Submit
  • memory/2068-140-0x0000000000613B74-mapping.dmp
    Download
  • memory/2068-139-0x0000000000600000-0x0000000000B68000-memory.dmp
    Filesize

    5.4MB

    Download
  • memory/2068-143-0x0000000000600000-0x0000000000B68000-memory.dmp
    Filesize

    5.4MB

    Download
  • memory/2068-144-0x0000000000600000-0x0000000000B68000-memory.dmp
    Filesize

    5.4MB

    Download
  • memory/2272-135-0x0000000000000000-mapping.dmp
    Download
  • memory/3228-130-0x0000000000000000-mapping.dmp
    Download
  • memory/4308-137-0x0000000000000000-mapping.dmp
    Download