Analysis

  • max time kernel
    150s
  • max time network
    147s
  • platform
    windows10_x64
  • resource
    win10v20210410
  • submitted
    06-05-2021 03:03

General

  • Target

    Factura Serfinanza038612482397383420891150743.exe

  • Size

    3.3MB

  • MD5

    d3125370ba418b71a02b9365db6929d0

  • SHA1

    6b8430a8b5bd8965bbac50feac7255d631d41f5c

  • SHA256

    566f71be697a18778afe097f9461ef1fa7f6fbf0cf634995561e971814eae319

  • SHA512

    40807071b38bc0ec37d7d6f061d23e06017d9738bfa11b5383fce7d31a4c152bdd5090b3243c0bd28eb5676341e0b2dbc2d411cb6d53cc11276e94a2ae92b1eb

Malware Config

Extracted

Family

remcos

C2

databasepropersonombrecomercialideasearchwords.services:3521

Signatures

  • Remcos

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

  • Turns off Windows Defender SpyNet reporting 2 TTPs
  • Windows security bypass 2 TTPs
  • Nirsoft 6 IoCs
  • Executes dropped EXE 10 IoCs
  • Windows security modification 2 TTPs 11 IoCs
  • Adds Run key to start application 2 TTPs 4 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 24 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 2 IoCs
  • Delays execution with timeout.exe 2 IoCs
  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 17 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Factura Serfinanza038612482397383420891150743.exe
    "C:\Users\Admin\AppData\Local\Temp\Factura Serfinanza038612482397383420891150743.exe"
    1⤵
    • Windows security modification
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2204
    • C:\Users\Admin\AppData\Local\Temp\fd52c56d-87f7-4daa-8bd0-21f83001ce56\AdvancedRun.exe
      "C:\Users\Admin\AppData\Local\Temp\fd52c56d-87f7-4daa-8bd0-21f83001ce56\AdvancedRun.exe" /EXEFilename "C:\Users\Admin\AppData\Local\Temp\fd52c56d-87f7-4daa-8bd0-21f83001ce56\test.bat" /WindowState ""0"" /PriorityClass ""32"" /CommandLine "" /StartDirectory "" /RunAs 8 /Run
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2680
      • C:\Users\Admin\AppData\Local\Temp\fd52c56d-87f7-4daa-8bd0-21f83001ce56\AdvancedRun.exe
        "C:\Users\Admin\AppData\Local\Temp\fd52c56d-87f7-4daa-8bd0-21f83001ce56\AdvancedRun.exe" /SpecialRun 4101d8 2680
        3⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:3832
    • 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\Factura Serfinanza038612482397383420891150743.exe" -Force
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3792
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c timeout 1
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4016
      • C:\Windows\SysWOW64\timeout.exe
        timeout 1
        3⤵
        • Delays execution with timeout.exe
        PID:2740
    • C:\Users\Admin\AppData\Local\Temp\Factura Serfinanza038612482397383420891150743.exe
      "C:\Users\Admin\AppData\Local\Temp\Factura Serfinanza038612482397383420891150743.exe"
      2⤵
      • Adds Run key to start application
      • Modifies registry class
      • Suspicious use of WriteProcessMemory
      PID:3828
      • C:\Windows\SysWOW64\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1816
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet1.exe"
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:736
          • C:\Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet1.exe
            C:\Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet1.exe
            5⤵
            • Executes dropped EXE
            • Windows security modification
            • Suspicious use of NtSetInformationThreadHideFromDebugger
            • Suspicious use of SetThreadContext
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:1956
            • C:\Users\Admin\AppData\Local\Temp\80c5ea0c-71d0-4be3-8e37-64e7ff0f44dd\AdvancedRun.exe
              "C:\Users\Admin\AppData\Local\Temp\80c5ea0c-71d0-4be3-8e37-64e7ff0f44dd\AdvancedRun.exe" /EXEFilename "C:\Users\Admin\AppData\Local\Temp\80c5ea0c-71d0-4be3-8e37-64e7ff0f44dd\test.bat" /WindowState ""0"" /PriorityClass ""32"" /CommandLine "" /StartDirectory "" /RunAs 8 /Run
              6⤵
              • Executes dropped EXE
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              • Suspicious use of WriteProcessMemory
              PID:4124
              • C:\Users\Admin\AppData\Local\Temp\80c5ea0c-71d0-4be3-8e37-64e7ff0f44dd\AdvancedRun.exe
                "C:\Users\Admin\AppData\Local\Temp\80c5ea0c-71d0-4be3-8e37-64e7ff0f44dd\AdvancedRun.exe" /SpecialRun 4101d8 4124
                7⤵
                • Executes dropped EXE
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                PID:4172
            • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
              "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet1.exe" -Force
              6⤵
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:4300
            • C:\Windows\SysWOW64\cmd.exe
              "C:\Windows\System32\cmd.exe" /c timeout 1
              6⤵
              • Suspicious use of WriteProcessMemory
              PID:4324
              • C:\Windows\SysWOW64\timeout.exe
                timeout 1
                7⤵
                • Delays execution with timeout.exe
                PID:4412
            • C:\Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet1.exe
              "C:\Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet1.exe"
              6⤵
              • Executes dropped EXE
              PID:4484
            • C:\Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet1.exe
              "C:\Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet1.exe"
              6⤵
              • Executes dropped EXE
              PID:4496
            • C:\Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet1.exe
              "C:\Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet1.exe"
              6⤵
              • Executes dropped EXE
              PID:4504
            • C:\Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet1.exe
              "C:\Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet1.exe"
              6⤵
              • Executes dropped EXE
              PID:4520
            • C:\Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet1.exe
              "C:\Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet1.exe"
              6⤵
              • Executes dropped EXE
              • Adds Run key to start application
              • Suspicious behavior: GetForegroundWindowSpam
              • Suspicious use of SetWindowsHookEx
              PID:4536
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -u -p 1956 -s 1616
              6⤵
              • Program crash
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:4584
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2204 -s 1620
      2⤵
      • Drops file in Windows directory
      • Program crash
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3532

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

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

    MD5

    1c19c16e21c97ed42d5beabc93391fc5

    SHA1

    8ad83f8e0b3acf8dfbbf87931e41f0d664c4df68

    SHA256

    1bcd97396c83babfe6c5068ba590d7a3f8b70e72955a9d1e4070648e404cbf05

    SHA512

    7d18776d8f649b3d29c182ff03efc6cea8b527542ee55304980f24577aae8b64e37044407776e220984346c3998ace5f8853afa58c8b38407482a728e9495e0c

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

    MD5

    7e7318eca614af4cb08ec30bec62f537

    SHA1

    c6e40ee01816f60f192612518df8db7da6d4d91a

    SHA256

    d536722740e44d65d627cfff1eb4e2be0894e96e3e0be12beceae9a35fa0b86b

    SHA512

    fa42d385583c26e4b6f4a4df23f7cc491674cc35d689ab331edb18fbe2deb0d37d6b5270b65bc3335146fa713c8aa8a41999079e857c9ea8feed5a68d9b00ca4

  • C:\Users\Admin\AppData\Local\Temp\80c5ea0c-71d0-4be3-8e37-64e7ff0f44dd\AdvancedRun.exe

    MD5

    17fc12902f4769af3a9271eb4e2dacce

    SHA1

    9a4a1581cc3971579574f837e110f3bd6d529dab

    SHA256

    29ae7b30ed8394c509c561f6117ea671ec412da50d435099756bbb257fafb10b

    SHA512

    036e0d62490c26dee27ef54e514302e1cc8a14de8ce3b9703bf7caf79cfae237e442c27a0edcf2c4fd41af4195ba9ed7e32e894767ce04467e79110e89522e4a

  • C:\Users\Admin\AppData\Local\Temp\80c5ea0c-71d0-4be3-8e37-64e7ff0f44dd\AdvancedRun.exe

    MD5

    17fc12902f4769af3a9271eb4e2dacce

    SHA1

    9a4a1581cc3971579574f837e110f3bd6d529dab

    SHA256

    29ae7b30ed8394c509c561f6117ea671ec412da50d435099756bbb257fafb10b

    SHA512

    036e0d62490c26dee27ef54e514302e1cc8a14de8ce3b9703bf7caf79cfae237e442c27a0edcf2c4fd41af4195ba9ed7e32e894767ce04467e79110e89522e4a

  • C:\Users\Admin\AppData\Local\Temp\80c5ea0c-71d0-4be3-8e37-64e7ff0f44dd\AdvancedRun.exe

    MD5

    17fc12902f4769af3a9271eb4e2dacce

    SHA1

    9a4a1581cc3971579574f837e110f3bd6d529dab

    SHA256

    29ae7b30ed8394c509c561f6117ea671ec412da50d435099756bbb257fafb10b

    SHA512

    036e0d62490c26dee27ef54e514302e1cc8a14de8ce3b9703bf7caf79cfae237e442c27a0edcf2c4fd41af4195ba9ed7e32e894767ce04467e79110e89522e4a

  • C:\Users\Admin\AppData\Local\Temp\fd52c56d-87f7-4daa-8bd0-21f83001ce56\AdvancedRun.exe

    MD5

    17fc12902f4769af3a9271eb4e2dacce

    SHA1

    9a4a1581cc3971579574f837e110f3bd6d529dab

    SHA256

    29ae7b30ed8394c509c561f6117ea671ec412da50d435099756bbb257fafb10b

    SHA512

    036e0d62490c26dee27ef54e514302e1cc8a14de8ce3b9703bf7caf79cfae237e442c27a0edcf2c4fd41af4195ba9ed7e32e894767ce04467e79110e89522e4a

  • C:\Users\Admin\AppData\Local\Temp\fd52c56d-87f7-4daa-8bd0-21f83001ce56\AdvancedRun.exe

    MD5

    17fc12902f4769af3a9271eb4e2dacce

    SHA1

    9a4a1581cc3971579574f837e110f3bd6d529dab

    SHA256

    29ae7b30ed8394c509c561f6117ea671ec412da50d435099756bbb257fafb10b

    SHA512

    036e0d62490c26dee27ef54e514302e1cc8a14de8ce3b9703bf7caf79cfae237e442c27a0edcf2c4fd41af4195ba9ed7e32e894767ce04467e79110e89522e4a

  • C:\Users\Admin\AppData\Local\Temp\fd52c56d-87f7-4daa-8bd0-21f83001ce56\AdvancedRun.exe

    MD5

    17fc12902f4769af3a9271eb4e2dacce

    SHA1

    9a4a1581cc3971579574f837e110f3bd6d529dab

    SHA256

    29ae7b30ed8394c509c561f6117ea671ec412da50d435099756bbb257fafb10b

    SHA512

    036e0d62490c26dee27ef54e514302e1cc8a14de8ce3b9703bf7caf79cfae237e442c27a0edcf2c4fd41af4195ba9ed7e32e894767ce04467e79110e89522e4a

  • C:\Users\Admin\AppData\Local\Temp\install.vbs

    MD5

    a39af763b1c09ead3c98a6a615f377fe

    SHA1

    9bd3d39c89e47fe7072270ecc80b810103235c03

    SHA256

    a3930d7535eb768523ee52bbe69f13f857a0ae0f982d7bfc354d802f21010f8f

    SHA512

    3ed8e33ac95fd2536286b4afb2ed2a082bb5f98843478262b32263a14a5dbe0425de7b8d9662a5e482b207ebf8484ace8009ecd1881a6f6f8b0ccf3b0fdfe5da

  • C:\Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet1.exe

    MD5

    d3125370ba418b71a02b9365db6929d0

    SHA1

    6b8430a8b5bd8965bbac50feac7255d631d41f5c

    SHA256

    566f71be697a18778afe097f9461ef1fa7f6fbf0cf634995561e971814eae319

    SHA512

    40807071b38bc0ec37d7d6f061d23e06017d9738bfa11b5383fce7d31a4c152bdd5090b3243c0bd28eb5676341e0b2dbc2d411cb6d53cc11276e94a2ae92b1eb

  • C:\Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet1.exe

    MD5

    d3125370ba418b71a02b9365db6929d0

    SHA1

    6b8430a8b5bd8965bbac50feac7255d631d41f5c

    SHA256

    566f71be697a18778afe097f9461ef1fa7f6fbf0cf634995561e971814eae319

    SHA512

    40807071b38bc0ec37d7d6f061d23e06017d9738bfa11b5383fce7d31a4c152bdd5090b3243c0bd28eb5676341e0b2dbc2d411cb6d53cc11276e94a2ae92b1eb

  • C:\Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet1.exe

    MD5

    d3125370ba418b71a02b9365db6929d0

    SHA1

    6b8430a8b5bd8965bbac50feac7255d631d41f5c

    SHA256

    566f71be697a18778afe097f9461ef1fa7f6fbf0cf634995561e971814eae319

    SHA512

    40807071b38bc0ec37d7d6f061d23e06017d9738bfa11b5383fce7d31a4c152bdd5090b3243c0bd28eb5676341e0b2dbc2d411cb6d53cc11276e94a2ae92b1eb

  • C:\Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet1.exe

    MD5

    d3125370ba418b71a02b9365db6929d0

    SHA1

    6b8430a8b5bd8965bbac50feac7255d631d41f5c

    SHA256

    566f71be697a18778afe097f9461ef1fa7f6fbf0cf634995561e971814eae319

    SHA512

    40807071b38bc0ec37d7d6f061d23e06017d9738bfa11b5383fce7d31a4c152bdd5090b3243c0bd28eb5676341e0b2dbc2d411cb6d53cc11276e94a2ae92b1eb

  • C:\Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet1.exe

    MD5

    d3125370ba418b71a02b9365db6929d0

    SHA1

    6b8430a8b5bd8965bbac50feac7255d631d41f5c

    SHA256

    566f71be697a18778afe097f9461ef1fa7f6fbf0cf634995561e971814eae319

    SHA512

    40807071b38bc0ec37d7d6f061d23e06017d9738bfa11b5383fce7d31a4c152bdd5090b3243c0bd28eb5676341e0b2dbc2d411cb6d53cc11276e94a2ae92b1eb

  • C:\Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet1.exe

    MD5

    d3125370ba418b71a02b9365db6929d0

    SHA1

    6b8430a8b5bd8965bbac50feac7255d631d41f5c

    SHA256

    566f71be697a18778afe097f9461ef1fa7f6fbf0cf634995561e971814eae319

    SHA512

    40807071b38bc0ec37d7d6f061d23e06017d9738bfa11b5383fce7d31a4c152bdd5090b3243c0bd28eb5676341e0b2dbc2d411cb6d53cc11276e94a2ae92b1eb

  • C:\Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet1.exe

    MD5

    d3125370ba418b71a02b9365db6929d0

    SHA1

    6b8430a8b5bd8965bbac50feac7255d631d41f5c

    SHA256

    566f71be697a18778afe097f9461ef1fa7f6fbf0cf634995561e971814eae319

    SHA512

    40807071b38bc0ec37d7d6f061d23e06017d9738bfa11b5383fce7d31a4c152bdd5090b3243c0bd28eb5676341e0b2dbc2d411cb6d53cc11276e94a2ae92b1eb

  • memory/736-148-0x0000000000000000-mapping.dmp

  • memory/1816-143-0x0000000000000000-mapping.dmp

  • memory/1956-174-0x0000000005DB0000-0x0000000005DB1000-memory.dmp

    Filesize

    4KB

  • memory/1956-149-0x0000000000000000-mapping.dmp

  • memory/2204-117-0x0000000002AC0000-0x0000000002AC1000-memory.dmp

    Filesize

    4KB

  • memory/2204-116-0x00000000050A0000-0x00000000050A1000-memory.dmp

    Filesize

    4KB

  • memory/2204-118-0x0000000002BC0000-0x0000000002C44000-memory.dmp

    Filesize

    528KB

  • memory/2204-119-0x0000000006A60000-0x0000000006A61000-memory.dmp

    Filesize

    4KB

  • memory/2204-114-0x0000000000560000-0x0000000000561000-memory.dmp

    Filesize

    4KB

  • memory/2680-120-0x0000000000000000-mapping.dmp

  • memory/2740-128-0x0000000000000000-mapping.dmp

  • memory/3792-132-0x0000000007A40000-0x0000000007A41000-memory.dmp

    Filesize

    4KB

  • memory/3792-204-0x0000000003143000-0x0000000003144000-memory.dmp

    Filesize

    4KB

  • memory/3792-142-0x00000000084F0000-0x00000000084F1000-memory.dmp

    Filesize

    4KB

  • memory/3792-125-0x0000000000000000-mapping.dmp

  • memory/3792-130-0x0000000003400000-0x0000000003401000-memory.dmp

    Filesize

    4KB

  • memory/3792-139-0x0000000008360000-0x0000000008361000-memory.dmp

    Filesize

    4KB

  • memory/3792-160-0x0000000009470000-0x00000000094A3000-memory.dmp

    Filesize

    204KB

  • memory/3792-169-0x0000000009240000-0x0000000009241000-memory.dmp

    Filesize

    4KB

  • memory/3792-138-0x0000000007BD0000-0x0000000007BD1000-memory.dmp

    Filesize

    4KB

  • memory/3792-172-0x000000007EEB0000-0x000000007EEB1000-memory.dmp

    Filesize

    4KB

  • memory/3792-131-0x00000000073E0000-0x00000000073E1000-memory.dmp

    Filesize

    4KB

  • memory/3792-176-0x00000000095B0000-0x00000000095B1000-memory.dmp

    Filesize

    4KB

  • memory/3792-137-0x0000000003142000-0x0000000003143000-memory.dmp

    Filesize

    4KB

  • memory/3792-136-0x0000000003140000-0x0000000003141000-memory.dmp

    Filesize

    4KB

  • memory/3792-133-0x0000000007AE0000-0x0000000007AE1000-memory.dmp

    Filesize

    4KB

  • memory/3792-135-0x0000000007EE0000-0x0000000007EE1000-memory.dmp

    Filesize

    4KB

  • memory/3792-182-0x0000000009770000-0x0000000009771000-memory.dmp

    Filesize

    4KB

  • memory/3792-134-0x0000000007E70000-0x0000000007E71000-memory.dmp

    Filesize

    4KB

  • memory/3828-140-0x0000000000400000-0x0000000000422000-memory.dmp

    Filesize

    136KB

  • memory/3828-141-0x0000000000413FA4-mapping.dmp

  • memory/3828-144-0x0000000000400000-0x0000000000422000-memory.dmp

    Filesize

    136KB

  • memory/3832-123-0x0000000000000000-mapping.dmp

  • memory/4016-126-0x0000000000000000-mapping.dmp

  • memory/4124-177-0x0000000000000000-mapping.dmp

  • memory/4172-180-0x0000000000000000-mapping.dmp

  • memory/4300-210-0x0000000007460000-0x0000000007461000-memory.dmp

    Filesize

    4KB

  • memory/4300-211-0x0000000007462000-0x0000000007463000-memory.dmp

    Filesize

    4KB

  • memory/4300-205-0x0000000000000000-mapping.dmp

  • memory/4300-219-0x000000007ECD0000-0x000000007ECD1000-memory.dmp

    Filesize

    4KB

  • memory/4300-220-0x0000000007463000-0x0000000007464000-memory.dmp

    Filesize

    4KB

  • memory/4324-206-0x0000000000000000-mapping.dmp

  • memory/4412-208-0x0000000000000000-mapping.dmp

  • memory/4536-216-0x0000000000413FA4-mapping.dmp

  • memory/4536-218-0x0000000000400000-0x0000000000422000-memory.dmp

    Filesize

    136KB