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Analysis

  • max time kernel
    298s
  • max time network
    282s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    24/09/2024, 14:21

General

  • Target

    Quotation_pdf.exe

  • Size

    883KB

  • MD5

    571902de75705d1aeaa32be01459dc65

  • SHA1

    4ccf3c9a339146008c1d8466857e13d3c7752a05

  • SHA256

    8f2c4543e4bc9194d1c1a9bc946a75d49162b0eee2715df4ba626980892107b5

  • SHA512

    966381cdeaf8213fefdca876052a59dcda9e2436cfc50b4516eca936ebb9e75b9421058969526fa0b46d06067a43398a51c8e7201fa72d39faa0153c4328a9d7

  • SSDEEP

    24576:kBGzjcJ6NacNEyNOU+6cNuuH2SNcjmYY4Swv:kE86N1l5x8uuWSpYXS2

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

127.0.0.1:59321

nnamoo.duckdns.org:59321

Attributes
  • audio_folder

    MicRecords

  • 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

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-41EVS0

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • startup_value

    Remcos

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Remcos

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

  • Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

    Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 21 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Quotation_pdf.exe
    "C:\Users\Admin\AppData\Local\Temp\Quotation_pdf.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4336
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\Quotation_pdf.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3692
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\efsOOkOP.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4028
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\efsOOkOP" /XML "C:\Users\Admin\AppData\Local\Temp\tmpBF97.tmp"
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:3352
    • C:\Users\Admin\AppData\Local\Temp\Quotation_pdf.exe
      "C:\Users\Admin\AppData\Local\Temp\Quotation_pdf.exe"
      2⤵
      • System Location Discovery: System Language Discovery
      PID:4196

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

    Filesize

    2KB

    MD5

    968cb9309758126772781b83adb8a28f

    SHA1

    8da30e71accf186b2ba11da1797cf67f8f78b47c

    SHA256

    92099c10776bb7e3f2a8d1b82d4d40d0c4627e4f1bf754a6e58dfd2c2e97042a

    SHA512

    4bd50732f8af4d688d95999bddfd296115d7033ddc38f86c9fb1f47fde202bffa27e9088bebcaa3064ca946af2f5c1ca6cbde49d0907f0005c7ab42874515dd3

  • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

    Filesize

    18KB

    MD5

    9e359ab4d6b62424ce6b4c38a62cabff

    SHA1

    42c4174f0f5999b8fda55a2351a73522afda7912

    SHA256

    9700164d6cbe727fdc8be5ef59e45f48d9e31d091765051b033539cc7449b721

    SHA512

    fbb4500b035b13abd99f0a23403376f0446a1686242260dc8eb39aa6f732c71d8eb01195b8a3170133b7317829e6420e2263138e9cb06ef2e13da20caa4e3a49

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_3jsrrlf3.zy1.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • C:\Users\Admin\AppData\Local\Temp\tmpBF97.tmp

    Filesize

    1KB

    MD5

    1cb3c95f9ec5fd989371e1a1b384888e

    SHA1

    b71bf029e1cde6d849e98eb81ceb81b6e4387643

    SHA256

    ec7ba767150cb0190257ee91ef0b6c00f3773b20b0e8563683b507061d121492

    SHA512

    1dbadc02ce670b240badf09689491135abf7ab1f43dfb4d5824737548505b07b989f91635833fa05e48456d420049a63a3f063e51cf258bc38959ca7cbf2f206

  • memory/3692-65-0x0000000007350000-0x00000000073F3000-memory.dmp

    Filesize

    652KB

  • memory/3692-76-0x0000000007CB0000-0x000000000832A000-memory.dmp

    Filesize

    6.5MB

  • memory/3692-54-0x000000006FB80000-0x000000006FBCC000-memory.dmp

    Filesize

    304KB

  • memory/3692-53-0x0000000007310000-0x0000000007342000-memory.dmp

    Filesize

    200KB

  • memory/3692-92-0x00000000749B0000-0x0000000075160000-memory.dmp

    Filesize

    7.7MB

  • memory/3692-16-0x00000000749B0000-0x0000000075160000-memory.dmp

    Filesize

    7.7MB

  • memory/3692-18-0x00000000749B0000-0x0000000075160000-memory.dmp

    Filesize

    7.7MB

  • memory/3692-22-0x0000000005B10000-0x0000000005B76000-memory.dmp

    Filesize

    408KB

  • memory/3692-21-0x0000000005410000-0x0000000005476000-memory.dmp

    Filesize

    408KB

  • memory/3692-20-0x0000000005370000-0x0000000005392000-memory.dmp

    Filesize

    136KB

  • memory/3692-52-0x00000000066F0000-0x000000000673C000-memory.dmp

    Filesize

    304KB

  • memory/3692-15-0x0000000002A30000-0x0000000002A66000-memory.dmp

    Filesize

    216KB

  • memory/3692-19-0x00000000749B0000-0x0000000075160000-memory.dmp

    Filesize

    7.7MB

  • memory/3692-17-0x00000000054E0000-0x0000000005B08000-memory.dmp

    Filesize

    6.2MB

  • memory/3692-27-0x0000000005C00000-0x0000000005F54000-memory.dmp

    Filesize

    3.3MB

  • memory/3692-64-0x00000000068E0000-0x00000000068FE000-memory.dmp

    Filesize

    120KB

  • memory/3692-51-0x0000000006340000-0x000000000635E000-memory.dmp

    Filesize

    120KB

  • memory/4028-83-0x0000000007420000-0x0000000007434000-memory.dmp

    Filesize

    80KB

  • memory/4028-82-0x0000000007410000-0x000000000741E000-memory.dmp

    Filesize

    56KB

  • memory/4028-84-0x0000000007520000-0x000000000753A000-memory.dmp

    Filesize

    104KB

  • memory/4028-81-0x00000000073E0000-0x00000000073F1000-memory.dmp

    Filesize

    68KB

  • memory/4028-80-0x0000000007460000-0x00000000074F6000-memory.dmp

    Filesize

    600KB

  • memory/4028-85-0x0000000007500000-0x0000000007508000-memory.dmp

    Filesize

    32KB

  • memory/4028-78-0x0000000007250000-0x000000000725A000-memory.dmp

    Filesize

    40KB

  • memory/4028-66-0x000000006FB80000-0x000000006FBCC000-memory.dmp

    Filesize

    304KB

  • memory/4028-24-0x00000000749B0000-0x0000000075160000-memory.dmp

    Filesize

    7.7MB

  • memory/4028-23-0x00000000749B0000-0x0000000075160000-memory.dmp

    Filesize

    7.7MB

  • memory/4028-91-0x00000000749B0000-0x0000000075160000-memory.dmp

    Filesize

    7.7MB

  • memory/4028-77-0x00000000071E0000-0x00000000071FA000-memory.dmp

    Filesize

    104KB

  • memory/4196-49-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/4196-106-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/4196-114-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/4196-113-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/4196-112-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/4196-111-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/4196-79-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/4196-110-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/4196-109-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/4196-48-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/4196-108-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/4196-46-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/4196-45-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/4196-107-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/4196-105-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/4196-103-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/4196-104-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/4196-93-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/4196-94-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/4196-95-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/4196-96-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/4196-99-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/4196-100-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/4196-101-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/4196-102-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/4336-2-0x0000000005FE0000-0x0000000006584000-memory.dmp

    Filesize

    5.6MB

  • memory/4336-3-0x0000000005980000-0x0000000005A12000-memory.dmp

    Filesize

    584KB

  • memory/4336-4-0x00000000749B0000-0x0000000075160000-memory.dmp

    Filesize

    7.7MB

  • memory/4336-50-0x00000000749B0000-0x0000000075160000-memory.dmp

    Filesize

    7.7MB

  • memory/4336-5-0x0000000005A60000-0x0000000005A6A000-memory.dmp

    Filesize

    40KB

  • memory/4336-0-0x00000000749BE000-0x00000000749BF000-memory.dmp

    Filesize

    4KB

  • memory/4336-6-0x0000000005F80000-0x0000000005F92000-memory.dmp

    Filesize

    72KB

  • memory/4336-7-0x00000000749BE000-0x00000000749BF000-memory.dmp

    Filesize

    4KB

  • memory/4336-8-0x00000000749B0000-0x0000000075160000-memory.dmp

    Filesize

    7.7MB

  • memory/4336-9-0x0000000007420000-0x00000000074DE000-memory.dmp

    Filesize

    760KB

  • memory/4336-1-0x0000000000EE0000-0x0000000000FC4000-memory.dmp

    Filesize

    912KB

  • memory/4336-10-0x0000000009B30000-0x0000000009BCC000-memory.dmp

    Filesize

    624KB