Analysis

  • max time kernel
    155s
  • max time network
    144s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230915-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230915-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04/10/2023, 02:48

General

  • Target

    43a1212d319ae37016aaf8394c837f94beb72526a62e8d795ca8cfee4d828f16.exe

  • Size

    1.1MB

  • MD5

    0cecb3eea0d83075069406d702f85229

  • SHA1

    666854907487d98166ca89f91247b3678d526fa0

  • SHA256

    43a1212d319ae37016aaf8394c837f94beb72526a62e8d795ca8cfee4d828f16

  • SHA512

    81ddbcf324cb23778d7c6f6940776394e94cc09091579d65857fa3e7a6b6e8276c9d837c3aa76c0afcee403c17c72805086246d395ea6be3aa0101f5deb7840c

  • SSDEEP

    6144:Fl51orRJXlDixHkUXe34cEOkCybEaQRXr9HNdvOa51BgVWWStmyyye/:TqXUHkUXe3GOkx2LIazBg0tmyyyI

Score
10/10
upx

Malware Config

Signatures

  • Suspicious use of NtCreateUserProcessOtherParentProcess 1 IoCs
  • Drops file in Drivers directory 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 2 IoCs
  • UPX packed file 8 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Unexpected DNS network traffic destination 1 IoCs

    Network traffic to other servers than the configured DNS servers was detected on the DNS port.

  • Drops file in System32 directory 26 IoCs
  • Drops file in Program Files directory 2 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks SCSI registry key(s) 3 TTPs 3 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Delays execution with timeout.exe 2 IoCs
  • Modifies data under HKEY_USERS 18 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: LoadsDriver 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 15 IoCs
  • Suspicious use of UnmapMainImage 1 IoCs
  • Suspicious use of WriteProcessMemory 29 IoCs

Processes

  • C:\Windows\system32\winlogon.exe
    winlogon.exe
    1⤵
      PID:620
      • C:\Program Files\Common Files\mtstocom.exe
        "C:\Program Files\Common Files\mtstocom.exe"
        2⤵
        • Drops file in Drivers directory
        • Executes dropped EXE
        • Drops file in System32 directory
        • Drops file in Windows directory
        • Checks SCSI registry key(s)
        • Modifies data under HKEY_USERS
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:2180
    • C:\Windows\Explorer.EXE
      C:\Windows\Explorer.EXE
      1⤵
      • Suspicious use of NtCreateUserProcessOtherParentProcess
      • Drops file in Program Files directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of UnmapMainImage
      • Suspicious use of WriteProcessMemory
      PID:3184
      • C:\Users\Admin\AppData\Local\Temp\43a1212d319ae37016aaf8394c837f94beb72526a62e8d795ca8cfee4d828f16.exe
        "C:\Users\Admin\AppData\Local\Temp\43a1212d319ae37016aaf8394c837f94beb72526a62e8d795ca8cfee4d828f16.exe"
        2⤵
        • Checks computer location settings
        • Drops file in System32 directory
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:4080
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c timeout /t 1 & del /Q /F "C:\Users\Admin\AppData\Local\Temp\43a1212d319ae37016aaf8394c837f94beb72526a62e8d795ca8cfee4d828f16.exe"
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:4908
          • C:\Windows\SysWOW64\timeout.exe
            timeout /t 1
            4⤵
            • Delays execution with timeout.exe
            PID:5108
    • C:\Windows\Syswow64\11ebd338
      C:\Windows\Syswow64\11ebd338
      1⤵
      • Executes dropped EXE
      • Drops file in System32 directory
      • Drops file in Windows directory
      • Modifies data under HKEY_USERS
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:4760
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c timeout /t 1 & del /Q /F "C:\Windows\Syswow64\11ebd338"
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:544
        • C:\Windows\SysWOW64\timeout.exe
          timeout /t 1
          3⤵
          • Delays execution with timeout.exe
          PID:2072

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

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          Downloads

          • C:\Program Files\Common Files\mtstocom.exe

            Filesize

            134KB

            MD5

            963d599f73fe512dcae1887c9fedd346

            SHA1

            b3a3c22ce3b3560403407cf3f59d64368b457296

            SHA256

            66479fca0dc380ecbd62bc55a75c2ab5b33fbf3d2119c47748fbf3a3dd3a0954

            SHA512

            47379a52e2844c3e76811234483fa5e1cc72005d18e8df28907a56f0a312c8b3d4919dce86e35d7ea734df64f29b4266ef2ccf25cf956d681cb6feee41b158e0

          • C:\Windows\SysWOW64\11ebd338

            Filesize

            1.1MB

            MD5

            ae60635b8bce2cfbb98f2f48e9cb6582

            SHA1

            0a8655aeee4a13c4363207460eb2773f122b695e

            SHA256

            b882d32363ada4c2d68296501be06fdabe0a39d21431a40f103c1729a76cc907

            SHA512

            bd02faf0a708a6e58871b064ea4ba125042c282ee0cabc465b6b4a1f4177cedbfbfbdb976cac1099ca04ac17a24b5d87bd843c8d4f12210a440d8e46177a8176

          • C:\Windows\SysWOW64\11ebd338

            Filesize

            1.1MB

            MD5

            ae60635b8bce2cfbb98f2f48e9cb6582

            SHA1

            0a8655aeee4a13c4363207460eb2773f122b695e

            SHA256

            b882d32363ada4c2d68296501be06fdabe0a39d21431a40f103c1729a76cc907

            SHA512

            bd02faf0a708a6e58871b064ea4ba125042c282ee0cabc465b6b4a1f4177cedbfbfbdb976cac1099ca04ac17a24b5d87bd843c8d4f12210a440d8e46177a8176

          • memory/620-31-0x000001E70D930000-0x000001E70D931000-memory.dmp

            Filesize

            4KB

          • memory/620-30-0x000001E70D8E0000-0x000001E70D908000-memory.dmp

            Filesize

            160KB

          • memory/2180-74-0x0000014267F90000-0x0000014267F91000-memory.dmp

            Filesize

            4KB

          • memory/2180-79-0x0000014268460000-0x0000014268461000-memory.dmp

            Filesize

            4KB

          • memory/2180-85-0x0000014268340000-0x0000014268341000-memory.dmp

            Filesize

            4KB

          • memory/2180-82-0x0000014268510000-0x00000142686D5000-memory.dmp

            Filesize

            1.8MB

          • memory/2180-81-0x0000014268460000-0x0000014268461000-memory.dmp

            Filesize

            4KB

          • memory/2180-20-0x0000014265DD0000-0x0000014265DD3000-memory.dmp

            Filesize

            12KB

          • memory/2180-21-0x0000014267840000-0x000001426790B000-memory.dmp

            Filesize

            812KB

          • memory/2180-23-0x0000014267840000-0x000001426790B000-memory.dmp

            Filesize

            812KB

          • memory/2180-80-0x0000014267FA0000-0x0000014267FA1000-memory.dmp

            Filesize

            4KB

          • memory/2180-25-0x0000014265E50000-0x0000014265E51000-memory.dmp

            Filesize

            4KB

          • memory/2180-26-0x00007FF8713D0000-0x00007FF8713E0000-memory.dmp

            Filesize

            64KB

          • memory/2180-71-0x0000014267F80000-0x0000014267F81000-memory.dmp

            Filesize

            4KB

          • memory/2180-78-0x0000014267F90000-0x0000014267F91000-memory.dmp

            Filesize

            4KB

          • memory/2180-77-0x0000014267F80000-0x0000014267F81000-memory.dmp

            Filesize

            4KB

          • memory/2180-76-0x0000014268510000-0x00000142686D5000-memory.dmp

            Filesize

            1.8MB

          • memory/2180-75-0x0000014267F80000-0x0000014267F81000-memory.dmp

            Filesize

            4KB

          • memory/2180-62-0x00007FF8713D0000-0x00007FF8713E0000-memory.dmp

            Filesize

            64KB

          • memory/2180-73-0x0000014267FA0000-0x0000014267FA1000-memory.dmp

            Filesize

            4KB

          • memory/2180-64-0x0000014267F70000-0x0000014267F71000-memory.dmp

            Filesize

            4KB

          • memory/2180-72-0x0000014267F70000-0x0000014267F71000-memory.dmp

            Filesize

            4KB

          • memory/2180-69-0x0000014267840000-0x000001426790B000-memory.dmp

            Filesize

            812KB

          • memory/2180-70-0x0000014265E50000-0x0000014265E51000-memory.dmp

            Filesize

            4KB

          • memory/3184-63-0x0000000008650000-0x0000000008749000-memory.dmp

            Filesize

            996KB

          • memory/3184-14-0x0000000007580000-0x0000000007581000-memory.dmp

            Filesize

            4KB

          • memory/3184-61-0x0000000007580000-0x0000000007581000-memory.dmp

            Filesize

            4KB

          • memory/3184-10-0x0000000007560000-0x0000000007563000-memory.dmp

            Filesize

            12KB

          • memory/3184-12-0x0000000007560000-0x0000000007563000-memory.dmp

            Filesize

            12KB

          • memory/3184-15-0x0000000008650000-0x0000000008749000-memory.dmp

            Filesize

            996KB

          • memory/3184-13-0x0000000007560000-0x0000000007563000-memory.dmp

            Filesize

            12KB

          • memory/4080-0-0x00000000009C0000-0x0000000000A49000-memory.dmp

            Filesize

            548KB

          • memory/4080-38-0x00000000009C0000-0x0000000000A49000-memory.dmp

            Filesize

            548KB

          • memory/4080-24-0x00000000009C0000-0x0000000000A49000-memory.dmp

            Filesize

            548KB

          • memory/4760-68-0x0000000000200000-0x0000000000289000-memory.dmp

            Filesize

            548KB

          • memory/4760-3-0x0000000000200000-0x0000000000289000-memory.dmp

            Filesize

            548KB

          • memory/4760-27-0x0000000000200000-0x0000000000289000-memory.dmp

            Filesize

            548KB