Analysis

  • max time kernel
    148s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    12-04-2024 01:30

General

  • Target

    b162074bf62543007615d08db1dffa75022858944a0ecc5de5ed8d3be561e3da.exe

  • Size

    910KB

  • MD5

    783addabb1e7dcb48130649faaf852c7

  • SHA1

    c87553da7df62530e9262b35930d6a15aff4949a

  • SHA256

    b162074bf62543007615d08db1dffa75022858944a0ecc5de5ed8d3be561e3da

  • SHA512

    9f352fd443bd680a71ce1a4ece252baa81c2c293727d520ce57da93d461808f50be6c22f4a6f8e0a18f0857785b47f783f1f3cc6c41442275c12149e067b3c3b

  • SSDEEP

    24576:IsWW2f6w8r89u8TeWMkzIULsHTJMGoMzyc/VdK:IsT2fTC8BSWMkluMMzyctd

Score
10/10

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

bignight.net:3363

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-1XSDBO

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Remcos

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

  • Detects Windows exceutables bypassing UAC using CMSTP COM interfaces. MITRE (T1218.003) 19 IoCs
  • Detects executables packed with SmartAssembly 1 IoCs
  • 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).

  • Creates scheduled task(s) 1 TTPs 1 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 21 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b162074bf62543007615d08db1dffa75022858944a0ecc5de5ed8d3be561e3da.exe
    "C:\Users\Admin\AppData\Local\Temp\b162074bf62543007615d08db1dffa75022858944a0ecc5de5ed8d3be561e3da.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4312
    • 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\b162074bf62543007615d08db1dffa75022858944a0ecc5de5ed8d3be561e3da.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1340
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\HFqduGIsFotY.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4288
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\HFqduGIsFotY" /XML "C:\Users\Admin\AppData\Local\Temp\tmp9B84.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1948
    • C:\Users\Admin\AppData\Local\Temp\b162074bf62543007615d08db1dffa75022858944a0ecc5de5ed8d3be561e3da.exe
      "C:\Users\Admin\AppData\Local\Temp\b162074bf62543007615d08db1dffa75022858944a0ecc5de5ed8d3be561e3da.exe"
      2⤵
      • Suspicious use of SetWindowsHookEx
      PID:1528

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\ProgramData\remcos\logs.dat

    Filesize

    144B

    MD5

    83b186ad7ed3c4dfe70dfc529ebe5e3b

    SHA1

    21a85e3c7fe7d37a7e5e69aa901c0cbf543a9355

    SHA256

    a9e1d1c5c5adf82ec0a4c4688dd228d4357b4222c434c5371b9bc50d4e259937

    SHA512

    e28c763fb4f6d07e02a04e7eeb70bb067821d62514362420f3477480ba66fcc32be3db3fb5295e822890d4cabfd943cb06c0661fa5c0996900b7bc9a4aa1a4d0

  • 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

    14140dcf30200324419f32b2da3a6e14

    SHA1

    5991540bd79b2f93dbac2a4eed99e4f7b281ecdd

    SHA256

    a6bd150d9a3194f7ebf3b7aa14f191e8213ad77b2e6f10e5f156b579d9187088

    SHA512

    0b22a272a049df7e0f2592dee9ca570e867a10948dfb6bf3a86ca71082ca957d1649066e87b0bfd5e1777cc8fc761a913d8f3c1a6f550dc25ff924c7d651b4f2

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_v2dw2thr.pti.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • C:\Users\Admin\AppData\Local\Temp\tmp9B84.tmp

    Filesize

    1KB

    MD5

    4261dfbd8420edb2cbe56ccb96f8c5b1

    SHA1

    18763e8e73f07110292fce297c0109bc28f08515

    SHA256

    edff98cccbcc6cb4cc6a7aeef7f26531a63c1407734223e4a34724cb1022f01d

    SHA512

    35277635da186b5faaec8d9599eff9e0abc6271bd1a4b359d3e56c49c4d74a63c5a1dcc6d3c04fa615ba763d88b7e7b87586e6df1f8e4c46b89161ccdff1436d

  • memory/1340-58-0x0000000006690000-0x00000000066DC000-memory.dmp

    Filesize

    304KB

  • memory/1340-43-0x0000000005C80000-0x0000000005FD4000-memory.dmp

    Filesize

    3.3MB

  • memory/1340-100-0x0000000074B70000-0x0000000075320000-memory.dmp

    Filesize

    7.7MB

  • memory/1340-94-0x00000000077B0000-0x00000000077B8000-memory.dmp

    Filesize

    32KB

  • memory/1340-93-0x00000000077D0000-0x00000000077EA000-memory.dmp

    Filesize

    104KB

  • memory/1340-91-0x00000000076C0000-0x00000000076CE000-memory.dmp

    Filesize

    56KB

  • memory/1340-15-0x0000000002820000-0x0000000002856000-memory.dmp

    Filesize

    216KB

  • memory/1340-18-0x0000000004E10000-0x0000000004E20000-memory.dmp

    Filesize

    64KB

  • memory/1340-17-0x0000000005450000-0x0000000005A78000-memory.dmp

    Filesize

    6.2MB

  • memory/1340-16-0x0000000074B70000-0x0000000075320000-memory.dmp

    Filesize

    7.7MB

  • memory/1340-61-0x000000007F530000-0x000000007F540000-memory.dmp

    Filesize

    64KB

  • memory/1340-19-0x0000000004E10000-0x0000000004E20000-memory.dmp

    Filesize

    64KB

  • memory/1340-89-0x0000000007710000-0x00000000077A6000-memory.dmp

    Filesize

    600KB

  • memory/1340-86-0x0000000006120000-0x000000000613A000-memory.dmp

    Filesize

    104KB

  • memory/1340-84-0x0000000007350000-0x00000000073F3000-memory.dmp

    Filesize

    652KB

  • memory/1340-60-0x0000000007310000-0x0000000007342000-memory.dmp

    Filesize

    200KB

  • memory/1340-31-0x0000000005390000-0x00000000053F6000-memory.dmp

    Filesize

    408KB

  • memory/1340-74-0x0000000006710000-0x000000000672E000-memory.dmp

    Filesize

    120KB

  • memory/1340-63-0x00000000710C0000-0x000000007110C000-memory.dmp

    Filesize

    304KB

  • memory/1340-56-0x0000000004EC0000-0x0000000004EDE000-memory.dmp

    Filesize

    120KB

  • memory/1528-120-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1528-57-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1528-133-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1528-49-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1528-51-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1528-54-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1528-52-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1528-55-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1528-39-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1528-125-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1528-126-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1528-44-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1528-106-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1528-131-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1528-107-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1528-105-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1528-112-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1528-113-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1528-119-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/4288-62-0x000000007F3D0000-0x000000007F3E0000-memory.dmp

    Filesize

    64KB

  • memory/4288-85-0x0000000007690000-0x0000000007D0A000-memory.dmp

    Filesize

    6.5MB

  • memory/4288-87-0x00000000070E0000-0x00000000070EA000-memory.dmp

    Filesize

    40KB

  • memory/4288-21-0x0000000002440000-0x0000000002450000-memory.dmp

    Filesize

    64KB

  • memory/4288-90-0x0000000007070000-0x0000000007081000-memory.dmp

    Filesize

    68KB

  • memory/4288-59-0x0000000002440000-0x0000000002450000-memory.dmp

    Filesize

    64KB

  • memory/4288-92-0x00000000072B0000-0x00000000072C4000-memory.dmp

    Filesize

    80KB

  • memory/4288-23-0x0000000074B70000-0x0000000075320000-memory.dmp

    Filesize

    7.7MB

  • memory/4288-64-0x00000000710C0000-0x000000007110C000-memory.dmp

    Filesize

    304KB

  • memory/4288-24-0x0000000004C40000-0x0000000004C62000-memory.dmp

    Filesize

    136KB

  • memory/4288-25-0x0000000005440000-0x00000000054A6000-memory.dmp

    Filesize

    408KB

  • memory/4288-101-0x0000000074B70000-0x0000000075320000-memory.dmp

    Filesize

    7.7MB

  • memory/4288-20-0x0000000002440000-0x0000000002450000-memory.dmp

    Filesize

    64KB

  • memory/4312-6-0x00000000055A0000-0x00000000055B8000-memory.dmp

    Filesize

    96KB

  • memory/4312-7-0x0000000005580000-0x0000000005588000-memory.dmp

    Filesize

    32KB

  • memory/4312-2-0x00000000057B0000-0x0000000005D54000-memory.dmp

    Filesize

    5.6MB

  • memory/4312-1-0x0000000074B70000-0x0000000075320000-memory.dmp

    Filesize

    7.7MB

  • memory/4312-3-0x00000000052E0000-0x0000000005372000-memory.dmp

    Filesize

    584KB

  • memory/4312-8-0x000000000C350000-0x000000000C35C000-memory.dmp

    Filesize

    48KB

  • memory/4312-9-0x000000000C830000-0x000000000C8F0000-memory.dmp

    Filesize

    768KB

  • memory/4312-10-0x000000000FF40000-0x000000000FFDC000-memory.dmp

    Filesize

    624KB

  • memory/4312-5-0x00000000053A0000-0x00000000053AA000-memory.dmp

    Filesize

    40KB

  • memory/4312-0-0x0000000000810000-0x00000000008FA000-memory.dmp

    Filesize

    936KB

  • memory/4312-4-0x0000000005540000-0x0000000005550000-memory.dmp

    Filesize

    64KB

  • memory/4312-50-0x0000000074B70000-0x0000000075320000-memory.dmp

    Filesize

    7.7MB