Analysis

  • max time kernel
    148s
  • max time network
    158s
  • platform
    windows10_x64
  • resource
    win10-en-20210920
  • submitted
    21-10-2021 03:34

General

  • Target

    Order copy.exe

  • Size

    963KB

  • MD5

    4e85bccd3ffbc25142507fe1883f2eda

  • SHA1

    634ca94d2f19b7784bf2de78657c7d927b21b52a

  • SHA256

    14dac7b193364d4c9d85f2cb2c1fa88683e8fffece0a499c90e49eca08a85e9d

  • SHA512

    1704cc8c9219323d455d5611ccaaf6a6103eda3a886dc17101b2a41de3db8064374640f29876f24e5322042d25c0f53c1051002f367d1ec027ce7ba5badf1774

Malware Config

Extracted

Family

remcos

Version

3.3.0 Pro

Botnet

RemoteHost

C2

sabrinaoyst.ddns.net:7019

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

    true

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • keylog_path

    %AppData%

  • mouse_option

    false

  • mutex

    Remcos-PACL2H

  • screenshot_crypt

    true

  • screenshot_flag

    true

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • startup_value

    Remcos

  • take_screenshot_option

    false

  • take_screenshot_time

    5

  • take_screenshot_title

    notepad;solitaire;

Signatures

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Remcos

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

  • Executes dropped EXE 4 IoCs
  • 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 system certificate store 2 TTPs 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 25 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 27 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Order copy.exe
    "C:\Users\Admin\AppData\Local\Temp\Order copy.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2492
    • C:\Windows\SysWOW64\cmd.exe
      "cmd.exe" /c REG ADD "HKCU\Software\Microsoft\Windows NT\CurrentVersion\Winlogon" /f /v "Shell" /t REG_SZ /d "explorer.exe,C:\Users\Admin\AppData\Roaming\lsacce.exe,"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1068
      • C:\Windows\SysWOW64\reg.exe
        REG ADD "HKCU\Software\Microsoft\Windows NT\CurrentVersion\Winlogon" /f /v "Shell" /t REG_SZ /d "explorer.exe,C:\Users\Admin\AppData\Roaming\lsacce.exe,"
        3⤵
        • Modifies WinLogon for persistence
        PID:768
    • C:\Users\Admin\AppData\Roaming\lsacce.exe
      "C:\Users\Admin\AppData\Roaming\lsacce.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:380
      • C:\Users\Admin\AppData\Local\Temp\AddInProcess32.exe
        "C:\Users\Admin\AppData\Local\Temp\\AddInProcess32.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetWindowsHookEx
        PID:3996
      • C:\Users\Admin\AppData\Local\Temp\lscce.exe
        "C:\Users\Admin\AppData\Local\Temp\lscce.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1360
        • C:\Users\Admin\AppData\Local\Temp\lscce.exe
          "C:\Users\Admin\AppData\Local\Temp\lscce.exe"
          4⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:1508

Network

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Winlogon Helper DLL

1
T1004

Defense Evasion

Modify Registry

2
T1112

Install Root Certificate

1
T1130

Discovery

System Information Discovery

1
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\lscce.exe.log
    MD5

    e555c48cb712a9597ecb55a60135d1f8

    SHA1

    2081c72d30c34ec3f61f9944545ecdaae11521f7

    SHA256

    815c80df060afa8acf7640ca011735ef77c66666d03901e04a8767827d5da4e9

    SHA512

    32129b5be15217e5400f1e7536270a703d62db60ebb06396b9d74703e6a0dcd2e78f7f42b2019093be1508a9310912f305b88de274a295c9135a4086cd8c8427

  • C:\Users\Admin\AppData\Local\Temp\AddInProcess32.exe
    MD5

    6a673bfc3b67ae9782cb31af2f234c68

    SHA1

    7544e89566d91e84e3cd437b9a073e5f6b56566e

    SHA256

    978a4093058aa2ebf05dc353897d90d950324389879b57741b64160825b5ec0e

    SHA512

    72c302372ce87ceda2a3c70a6005d3f9c112f1641bc7fe6824c718971233e66c07e2996d2785fa358566c38714c25ea812c05c7cfd2f588284849d495fd24f39

  • C:\Users\Admin\AppData\Local\Temp\lscce.exe
    MD5

    0e362e7005823d0bec3719b902ed6d62

    SHA1

    590d860b909804349e0cdc2f1662b37bd62f7463

    SHA256

    2d0dc6216f613ac7551a7e70a798c22aee8eb9819428b1357e2b8c73bef905ad

    SHA512

    518991b68496b3f8545e418cf9b345e0791e09cc20d177b8aa47e0aba447aa55383c64f5bdaca39f2b061a5d08c16f2ad484af8a9f238ca23ab081618fba3ad3

  • C:\Users\Admin\AppData\Local\Temp\lscce.exe
    MD5

    0e362e7005823d0bec3719b902ed6d62

    SHA1

    590d860b909804349e0cdc2f1662b37bd62f7463

    SHA256

    2d0dc6216f613ac7551a7e70a798c22aee8eb9819428b1357e2b8c73bef905ad

    SHA512

    518991b68496b3f8545e418cf9b345e0791e09cc20d177b8aa47e0aba447aa55383c64f5bdaca39f2b061a5d08c16f2ad484af8a9f238ca23ab081618fba3ad3

  • C:\Users\Admin\AppData\Local\Temp\lscce.exe
    MD5

    0e362e7005823d0bec3719b902ed6d62

    SHA1

    590d860b909804349e0cdc2f1662b37bd62f7463

    SHA256

    2d0dc6216f613ac7551a7e70a798c22aee8eb9819428b1357e2b8c73bef905ad

    SHA512

    518991b68496b3f8545e418cf9b345e0791e09cc20d177b8aa47e0aba447aa55383c64f5bdaca39f2b061a5d08c16f2ad484af8a9f238ca23ab081618fba3ad3

  • C:\Users\Admin\AppData\Local\Temp\lscce.txt
    MD5

    7e7f5bed408e14b2462f65dd05cd6330

    SHA1

    f1d0b0b1947873c315cae684ddcef862aa7777ad

    SHA256

    4206e27909aae16641f9a213b751f379c9c4cdc7c9f0ba31ae74111f9fbc24cc

    SHA512

    21772d79b85b05d676b9fcec12f22d62a4e8829e9b930b020a21bea0651796dc1ff3bc12f2453a14e4eff58b324ecdf9740af174476a67d09b0dec2578ef0512

  • C:\Users\Admin\AppData\Local\Temp\lscce.txt
    MD5

    7d37bb4d1c90a2e7a96f86f7292bf2e4

    SHA1

    489c76efb776923912d64cdb9ae3e57843e0ad67

    SHA256

    e9c072b32c3c5cc000efc8b762e4f1bde179291156d906cdebf56181b6d8c033

    SHA512

    295317dac09e9ddc98659a82c02f2b2754e066af1b0b39341094fb4534d0471f0b363ba4373fd13e76dcdf7b6ad16019caf391d86b478b508167d65d888857a4

  • C:\Users\Admin\AppData\Local\Temp\lscce.txt
    MD5

    4380823742988b1c49583aa18752d6dd

    SHA1

    aab5181b6235df0e6b40f4cc7efd341830b035e4

    SHA256

    cbff3c0a917a21d13eff7b5d49e77cc4e87654462b04ba631e17808a7f63811b

    SHA512

    b1a41e0766c43dc6f982775849d52c288e7f7f8a9b926343d1fd87cf031ea49fc1325cfde6626df830e5f849b0837f2db581390320a16df62c982702c7f50149

  • C:\Users\Admin\AppData\Roaming\lsacce.exe
    MD5

    4e85bccd3ffbc25142507fe1883f2eda

    SHA1

    634ca94d2f19b7784bf2de78657c7d927b21b52a

    SHA256

    14dac7b193364d4c9d85f2cb2c1fa88683e8fffece0a499c90e49eca08a85e9d

    SHA512

    1704cc8c9219323d455d5611ccaaf6a6103eda3a886dc17101b2a41de3db8064374640f29876f24e5322042d25c0f53c1051002f367d1ec027ce7ba5badf1774

  • C:\Users\Admin\AppData\Roaming\lsacce.exe
    MD5

    4e85bccd3ffbc25142507fe1883f2eda

    SHA1

    634ca94d2f19b7784bf2de78657c7d927b21b52a

    SHA256

    14dac7b193364d4c9d85f2cb2c1fa88683e8fffece0a499c90e49eca08a85e9d

    SHA512

    1704cc8c9219323d455d5611ccaaf6a6103eda3a886dc17101b2a41de3db8064374640f29876f24e5322042d25c0f53c1051002f367d1ec027ce7ba5badf1774

  • memory/380-125-0x0000000000000000-mapping.dmp
  • memory/380-134-0x0000000005230000-0x000000000572E000-memory.dmp
    Filesize

    5.0MB

  • memory/380-136-0x0000000005720000-0x000000000572A000-memory.dmp
    Filesize

    40KB

  • memory/380-141-0x0000000005230000-0x000000000572E000-memory.dmp
    Filesize

    5.0MB

  • memory/768-124-0x0000000000000000-mapping.dmp
  • memory/1068-123-0x0000000000000000-mapping.dmp
  • memory/1360-145-0x0000000000070000-0x0000000000071000-memory.dmp
    Filesize

    4KB

  • memory/1360-142-0x0000000000000000-mapping.dmp
  • memory/1508-149-0x0000000000000000-mapping.dmp
  • memory/2492-115-0x0000000000E70000-0x0000000000E71000-memory.dmp
    Filesize

    4KB

  • memory/2492-122-0x0000000001920000-0x0000000001944000-memory.dmp
    Filesize

    144KB

  • memory/2492-121-0x0000000005820000-0x0000000005D1E000-memory.dmp
    Filesize

    5.0MB

  • memory/2492-120-0x0000000005990000-0x0000000005991000-memory.dmp
    Filesize

    4KB

  • memory/2492-119-0x00000000058C0000-0x00000000058C1000-memory.dmp
    Filesize

    4KB

  • memory/2492-118-0x0000000005820000-0x0000000005821000-memory.dmp
    Filesize

    4KB

  • memory/2492-117-0x0000000005D20000-0x0000000005D21000-memory.dmp
    Filesize

    4KB

  • memory/3996-140-0x0000000000400000-0x0000000000479000-memory.dmp
    Filesize

    484KB

  • memory/3996-137-0x0000000000400000-0x0000000000479000-memory.dmp
    Filesize

    484KB

  • memory/3996-138-0x000000000042FC39-mapping.dmp