Analysis

  • max time kernel
    40s
  • max time network
    44s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    14-03-2023 21:59

General

  • Target

    XWorm V3.1 .exe

  • Size

    10.1MB

  • MD5

    320526ae9b5dbd99a38d158578c84ccb

  • SHA1

    60daf13da5fa663c1e7e67ac113fbb5859264b8c

  • SHA256

    91a8aec23ab8e79172c8d7cbf6a733e73157941687eb58e8ffa543b7e721b7ea

  • SHA512

    5c62082634d4abc4bc524b268c5bcf476f6a900cba8becc49e143c8b207f0f661e921a26a62df746236f65a9978b7691e541283835056c9c5a6efac0a382cf0f

  • SSDEEP

    196608:ih0Avmh7fFbZyD3nvCEg+xyZTEQkM1V8/6zCSR6lGCUOGJ1PldRBo+zoDmAYU:iq1pbqdg+yZTUaCkZXOqdbS

Malware Config

Extracted

Family

asyncrat

Version

| Edit 3LOSH RAT

Mutex

AsyncMutex_7SI8OkPnk

Attributes
  • delay

    3

  • install

    true

  • install_file

    ContainerRuntime.exe

  • install_folder

    %AppData%

  • pastebin_config

    https://pastebin.com/raw/Kb8rTgY7

aes.plain

Signatures

  • AsyncRat

    AsyncRAT is designed to remotely monitor and control other computers written in C#.

  • Xworm

    Xworm is a remote access trojan written in C#.

  • Async RAT payload 10 IoCs
  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
  • Checks BIOS information in registry 2 TTPs 2 IoCs

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

  • Deletes itself 1 IoCs
  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 4 IoCs
  • Themida packer 3 IoCs

    Detects Themida, an advanced Windows software protection system.

  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

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

  • Delays execution with timeout.exe 2 IoCs
  • Modifies system certificate store 2 TTPs 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 12 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SendNotifyMessage 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\XWorm V3.1 .exe
    "C:\Users\Admin\AppData\Local\Temp\XWorm V3.1 .exe"
    1⤵
    • Identifies VirtualBox via ACPI registry values (likely anti-VM)
    • Checks BIOS information in registry
    • Loads dropped DLL
    • Checks whether UAC is enabled
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of WriteProcessMemory
    PID:1232
    • C:\Users\Admin\AppData\Local\Temp\XWorm V3.1.exe
      "C:\Users\Admin\AppData\Local\Temp\XWorm V3.1.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      PID:1484
    • C:\Users\Admin\AppData\Local\Temp\svchost.exe
      "C:\Users\Admin\AppData\Local\Temp\svchost.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1400
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "ContainerRuntime" /tr '"C:\Users\Admin\AppData\Roaming\ContainerRuntime.exe"' & exit
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:888
        • C:\Windows\SysWOW64\schtasks.exe
          schtasks /create /f /sc onlogon /rl highest /tn "ContainerRuntime" /tr '"C:\Users\Admin\AppData\Roaming\ContainerRuntime.exe"'
          4⤵
          • Creates scheduled task(s)
          PID:560
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp541A.tmp.bat""
        3⤵
        • Loads dropped DLL
        • Suspicious use of WriteProcessMemory
        PID:1980
        • C:\Windows\SysWOW64\timeout.exe
          timeout 3
          4⤵
          • Delays execution with timeout.exe
          PID:588
        • C:\Users\Admin\AppData\Roaming\ContainerRuntime.exe
          "C:\Users\Admin\AppData\Roaming\ContainerRuntime.exe"
          4⤵
          • Executes dropped EXE
          • Modifies system certificate store
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          PID:1572
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp368C.tmp.bat""
      2⤵
      • Deletes itself
      • Suspicious use of WriteProcessMemory
      PID:1988
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:2032
  • C:\Windows\system32\wbem\WmiApSrv.exe
    C:\Windows\system32\wbem\WmiApSrv.exe
    1⤵
      PID:1984

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Execution

    Scheduled Task

    1
    T1053

    Persistence

    Scheduled Task

    1
    T1053

    Privilege Escalation

    Scheduled Task

    1
    T1053

    Defense Evasion

    Virtualization/Sandbox Evasion

    1
    T1497

    Install Root Certificate

    1
    T1130

    Modify Registry

    1
    T1112

    Discovery

    Query Registry

    2
    T1012

    Virtualization/Sandbox Evasion

    1
    T1497

    System Information Discovery

    3
    T1082

    Command and Control

    Web Service

    1
    T1102

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\XWorm V3.1.exe
      Filesize

      6.9MB

      MD5

      37a9fdc56e605d2342da88a6e6182b4b

      SHA1

      20bc3df33bbbb676d2a3c572cff4c1d58c79055d

      SHA256

      422ba689937e3748a4b6bd3c5af2dce0211e8a48eb25767e6d1d2192d27f1f58

      SHA512

      f556805142b77b549845c0fa2206a4cb29d54752dc5650d9db58c1bbe1f7d0fc15ce04551853fb6454873877dbb88bebd15d81b875b405cdcc2fd21a515820d3

    • C:\Users\Admin\AppData\Local\Temp\XWorm V3.1.exe
      Filesize

      6.9MB

      MD5

      37a9fdc56e605d2342da88a6e6182b4b

      SHA1

      20bc3df33bbbb676d2a3c572cff4c1d58c79055d

      SHA256

      422ba689937e3748a4b6bd3c5af2dce0211e8a48eb25767e6d1d2192d27f1f58

      SHA512

      f556805142b77b549845c0fa2206a4cb29d54752dc5650d9db58c1bbe1f7d0fc15ce04551853fb6454873877dbb88bebd15d81b875b405cdcc2fd21a515820d3

    • C:\Users\Admin\AppData\Local\Temp\XWorm V3.1.exe
      Filesize

      6.9MB

      MD5

      37a9fdc56e605d2342da88a6e6182b4b

      SHA1

      20bc3df33bbbb676d2a3c572cff4c1d58c79055d

      SHA256

      422ba689937e3748a4b6bd3c5af2dce0211e8a48eb25767e6d1d2192d27f1f58

      SHA512

      f556805142b77b549845c0fa2206a4cb29d54752dc5650d9db58c1bbe1f7d0fc15ce04551853fb6454873877dbb88bebd15d81b875b405cdcc2fd21a515820d3

    • C:\Users\Admin\AppData\Local\Temp\svchost.exe
      Filesize

      61KB

      MD5

      e59c2ff54922cbc9a69e7ae878539eb8

      SHA1

      09f50da27d4bd6a9a4f7c46743734496b3e8359a

      SHA256

      d6ba147ab0933d4ecb539071a4b6c32e3d24856c5badd508db33de2692644e88

      SHA512

      10cf7859f2e2c75a24495b2d05deb4e5f770ebd80b4831b3b603df83d3a004e102429658e01acb7609b6c774441328bf9420292e66352a4759a70a700750c9a4

    • C:\Users\Admin\AppData\Local\Temp\svchost.exe
      Filesize

      61KB

      MD5

      e59c2ff54922cbc9a69e7ae878539eb8

      SHA1

      09f50da27d4bd6a9a4f7c46743734496b3e8359a

      SHA256

      d6ba147ab0933d4ecb539071a4b6c32e3d24856c5badd508db33de2692644e88

      SHA512

      10cf7859f2e2c75a24495b2d05deb4e5f770ebd80b4831b3b603df83d3a004e102429658e01acb7609b6c774441328bf9420292e66352a4759a70a700750c9a4

    • C:\Users\Admin\AppData\Local\Temp\tmp368C.tmp.bat
      Filesize

      163B

      MD5

      b7152b4a35043086ec56c80a1b4b5301

      SHA1

      3cd8f79506df5354820afcdd7370c16858eb36f1

      SHA256

      6af73a00d01c01967e146f4be24a7672169dc145f53d350a35248598ed4898e3

      SHA512

      395ad584fe146b8dac1b8944c43dcbf2625a842365d83bd9ac0915c8551df841a3685f16ea389d2e2d07eed4fbc79674ec97ce02bf43fa6da8cc5123a8e05364

    • C:\Users\Admin\AppData\Local\Temp\tmp368C.tmp.bat
      Filesize

      163B

      MD5

      b7152b4a35043086ec56c80a1b4b5301

      SHA1

      3cd8f79506df5354820afcdd7370c16858eb36f1

      SHA256

      6af73a00d01c01967e146f4be24a7672169dc145f53d350a35248598ed4898e3

      SHA512

      395ad584fe146b8dac1b8944c43dcbf2625a842365d83bd9ac0915c8551df841a3685f16ea389d2e2d07eed4fbc79674ec97ce02bf43fa6da8cc5123a8e05364

    • C:\Users\Admin\AppData\Local\Temp\tmp541A.tmp.bat
      Filesize

      160B

      MD5

      468b541760887d4615d6e9d8ad5996f4

      SHA1

      d1b3368fb2e01334850ae9585a2e80612e066c3a

      SHA256

      816af797d2b94a5255e2656fd973a1c62c1b6a13260499091e09fdfd5eb35a85

      SHA512

      1124f645418edb42851c7c3519df9629340a9350b11f91c8b07eb961653f8dee8ece71089eef1fc279dfa4ca37b9dec09161a81c8358ad35529cd51794c0966d

    • C:\Users\Admin\AppData\Local\Temp\tmp541A.tmp.bat
      Filesize

      160B

      MD5

      468b541760887d4615d6e9d8ad5996f4

      SHA1

      d1b3368fb2e01334850ae9585a2e80612e066c3a

      SHA256

      816af797d2b94a5255e2656fd973a1c62c1b6a13260499091e09fdfd5eb35a85

      SHA512

      1124f645418edb42851c7c3519df9629340a9350b11f91c8b07eb961653f8dee8ece71089eef1fc279dfa4ca37b9dec09161a81c8358ad35529cd51794c0966d

    • C:\Users\Admin\AppData\Roaming\ContainerRuntime.exe
      Filesize

      61KB

      MD5

      e59c2ff54922cbc9a69e7ae878539eb8

      SHA1

      09f50da27d4bd6a9a4f7c46743734496b3e8359a

      SHA256

      d6ba147ab0933d4ecb539071a4b6c32e3d24856c5badd508db33de2692644e88

      SHA512

      10cf7859f2e2c75a24495b2d05deb4e5f770ebd80b4831b3b603df83d3a004e102429658e01acb7609b6c774441328bf9420292e66352a4759a70a700750c9a4

    • C:\Users\Admin\AppData\Roaming\ContainerRuntime.exe
      Filesize

      61KB

      MD5

      e59c2ff54922cbc9a69e7ae878539eb8

      SHA1

      09f50da27d4bd6a9a4f7c46743734496b3e8359a

      SHA256

      d6ba147ab0933d4ecb539071a4b6c32e3d24856c5badd508db33de2692644e88

      SHA512

      10cf7859f2e2c75a24495b2d05deb4e5f770ebd80b4831b3b603df83d3a004e102429658e01acb7609b6c774441328bf9420292e66352a4759a70a700750c9a4

    • C:\Users\Admin\AppData\Roaming\ContainerRuntime.exe
      Filesize

      61KB

      MD5

      e59c2ff54922cbc9a69e7ae878539eb8

      SHA1

      09f50da27d4bd6a9a4f7c46743734496b3e8359a

      SHA256

      d6ba147ab0933d4ecb539071a4b6c32e3d24856c5badd508db33de2692644e88

      SHA512

      10cf7859f2e2c75a24495b2d05deb4e5f770ebd80b4831b3b603df83d3a004e102429658e01acb7609b6c774441328bf9420292e66352a4759a70a700750c9a4

    • \Users\Admin\AppData\Local\Temp\XWorm V3.1.exe
      Filesize

      6.9MB

      MD5

      37a9fdc56e605d2342da88a6e6182b4b

      SHA1

      20bc3df33bbbb676d2a3c572cff4c1d58c79055d

      SHA256

      422ba689937e3748a4b6bd3c5af2dce0211e8a48eb25767e6d1d2192d27f1f58

      SHA512

      f556805142b77b549845c0fa2206a4cb29d54752dc5650d9db58c1bbe1f7d0fc15ce04551853fb6454873877dbb88bebd15d81b875b405cdcc2fd21a515820d3

    • \Users\Admin\AppData\Local\Temp\XWorm V3.1.exe
      Filesize

      6.9MB

      MD5

      37a9fdc56e605d2342da88a6e6182b4b

      SHA1

      20bc3df33bbbb676d2a3c572cff4c1d58c79055d

      SHA256

      422ba689937e3748a4b6bd3c5af2dce0211e8a48eb25767e6d1d2192d27f1f58

      SHA512

      f556805142b77b549845c0fa2206a4cb29d54752dc5650d9db58c1bbe1f7d0fc15ce04551853fb6454873877dbb88bebd15d81b875b405cdcc2fd21a515820d3

    • \Users\Admin\AppData\Local\Temp\svchost.exe
      Filesize

      61KB

      MD5

      e59c2ff54922cbc9a69e7ae878539eb8

      SHA1

      09f50da27d4bd6a9a4f7c46743734496b3e8359a

      SHA256

      d6ba147ab0933d4ecb539071a4b6c32e3d24856c5badd508db33de2692644e88

      SHA512

      10cf7859f2e2c75a24495b2d05deb4e5f770ebd80b4831b3b603df83d3a004e102429658e01acb7609b6c774441328bf9420292e66352a4759a70a700750c9a4

    • \Users\Admin\AppData\Roaming\ContainerRuntime.exe
      Filesize

      61KB

      MD5

      e59c2ff54922cbc9a69e7ae878539eb8

      SHA1

      09f50da27d4bd6a9a4f7c46743734496b3e8359a

      SHA256

      d6ba147ab0933d4ecb539071a4b6c32e3d24856c5badd508db33de2692644e88

      SHA512

      10cf7859f2e2c75a24495b2d05deb4e5f770ebd80b4831b3b603df83d3a004e102429658e01acb7609b6c774441328bf9420292e66352a4759a70a700750c9a4

    • memory/1232-86-0x0000000000DC0000-0x0000000001D28000-memory.dmp
      Filesize

      15.4MB

    • memory/1232-57-0x0000000000DC0000-0x0000000001D28000-memory.dmp
      Filesize

      15.4MB

    • memory/1232-58-0x0000000000DC0000-0x0000000001D28000-memory.dmp
      Filesize

      15.4MB

    • memory/1232-56-0x0000000000DC0000-0x0000000001D28000-memory.dmp
      Filesize

      15.4MB

    • memory/1400-91-0x00000000008C0000-0x0000000000900000-memory.dmp
      Filesize

      256KB

    • memory/1400-75-0x0000000000FE0000-0x0000000000FF6000-memory.dmp
      Filesize

      88KB

    • memory/1484-93-0x000000001B700000-0x000000001B780000-memory.dmp
      Filesize

      512KB

    • memory/1484-85-0x00000000001A0000-0x0000000000896000-memory.dmp
      Filesize

      7.0MB

    • memory/1484-87-0x000000001B700000-0x000000001B780000-memory.dmp
      Filesize

      512KB

    • memory/1484-92-0x000000001B700000-0x000000001B780000-memory.dmp
      Filesize

      512KB

    • memory/1484-88-0x000000001EA70000-0x000000001F5DA000-memory.dmp
      Filesize

      11.4MB

    • memory/1484-108-0x000000001B700000-0x000000001B780000-memory.dmp
      Filesize

      512KB

    • memory/1484-109-0x000000001B700000-0x000000001B780000-memory.dmp
      Filesize

      512KB

    • memory/1484-110-0x000000001B700000-0x000000001B780000-memory.dmp
      Filesize

      512KB

    • memory/1572-106-0x00000000000D0000-0x00000000000E6000-memory.dmp
      Filesize

      88KB

    • memory/1572-107-0x00000000002E0000-0x0000000000320000-memory.dmp
      Filesize

      256KB

    • memory/1572-111-0x00000000002E0000-0x0000000000320000-memory.dmp
      Filesize

      256KB