Analysis

  • max time kernel
    143s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    15-03-2023 03:42

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

Extracted

Family

xworm

Attributes
  • install_file

    ContainerRuntime.exe

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 12 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
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 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:1712
    • 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 use of AdjustPrivilegeToken
      PID:988
    • 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:684
      • 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:1936
        • 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:1068
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp3F04.tmp.bat""
        3⤵
        • Loads dropped DLL
        • Suspicious use of WriteProcessMemory
        PID:624
        • C:\Windows\SysWOW64\timeout.exe
          timeout 3
          4⤵
          • Delays execution with timeout.exe
          PID:2004
        • C:\Users\Admin\AppData\Roaming\ContainerRuntime.exe
          "C:\Users\Admin\AppData\Roaming\ContainerRuntime.exe"
          4⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          PID:880
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp2473.tmp.bat""
      2⤵
      • Deletes itself
      • Suspicious use of WriteProcessMemory
      PID:832
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:1192

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

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\tmp2473.tmp.bat
    Filesize

    163B

    MD5

    ab106923a6589186928679de7d641cc5

    SHA1

    edb335b2f49c209283e05d17457ad9bf4d3c94f2

    SHA256

    6dfdaf01434272d46521e78f21b604d393fef599a28ba4c71df023750b960878

    SHA512

    efff948292d05c742e83088c78cd32a2af49e3328557de82e0b25df2f089ab14c1195f0fbce8d6f298f79dcfad3891b09a3b6ce415fbf36d869b56174a953100

  • C:\Users\Admin\AppData\Local\Temp\tmp2473.tmp.bat
    Filesize

    163B

    MD5

    ab106923a6589186928679de7d641cc5

    SHA1

    edb335b2f49c209283e05d17457ad9bf4d3c94f2

    SHA256

    6dfdaf01434272d46521e78f21b604d393fef599a28ba4c71df023750b960878

    SHA512

    efff948292d05c742e83088c78cd32a2af49e3328557de82e0b25df2f089ab14c1195f0fbce8d6f298f79dcfad3891b09a3b6ce415fbf36d869b56174a953100

  • C:\Users\Admin\AppData\Local\Temp\tmp3F04.tmp.bat
    Filesize

    160B

    MD5

    42595f41242aab1b30e4165c55a78642

    SHA1

    e684e6494c2c943dbbff0b9bec3809fcddf0bd42

    SHA256

    6f723d87b1f6fc27c54262d75b0647eecefa2b0f2835f07795b5b47895aa996a

    SHA512

    1a672b62f36745de6a942a41ec13bd9907cb62795969f6e5d359e17dea9b0a4d2e1483aaa4107f76981889576a3be816f86c990fdc98632e2d2e1745bfa872ef

  • C:\Users\Admin\AppData\Local\Temp\tmp3F04.tmp.bat
    Filesize

    160B

    MD5

    42595f41242aab1b30e4165c55a78642

    SHA1

    e684e6494c2c943dbbff0b9bec3809fcddf0bd42

    SHA256

    6f723d87b1f6fc27c54262d75b0647eecefa2b0f2835f07795b5b47895aa996a

    SHA512

    1a672b62f36745de6a942a41ec13bd9907cb62795969f6e5d359e17dea9b0a4d2e1483aaa4107f76981889576a3be816f86c990fdc98632e2d2e1745bfa872ef

  • 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/684-75-0x0000000001110000-0x0000000001126000-memory.dmp
    Filesize

    88KB

  • memory/684-88-0x0000000000240000-0x0000000000280000-memory.dmp
    Filesize

    256KB

  • memory/880-111-0x00000000049C0000-0x0000000004A00000-memory.dmp
    Filesize

    256KB

  • memory/880-106-0x0000000001130000-0x0000000001146000-memory.dmp
    Filesize

    88KB

  • memory/880-107-0x00000000049C0000-0x0000000004A00000-memory.dmp
    Filesize

    256KB

  • memory/988-108-0x000000001B560000-0x000000001B5E0000-memory.dmp
    Filesize

    512KB

  • memory/988-89-0x000000001E970000-0x000000001F4DA000-memory.dmp
    Filesize

    11.4MB

  • memory/988-87-0x000000001B560000-0x000000001B5E0000-memory.dmp
    Filesize

    512KB

  • memory/988-85-0x0000000000110000-0x0000000000806000-memory.dmp
    Filesize

    7.0MB

  • memory/988-101-0x000000001B560000-0x000000001B5E0000-memory.dmp
    Filesize

    512KB

  • memory/988-102-0x000000001B560000-0x000000001B5E0000-memory.dmp
    Filesize

    512KB

  • memory/988-110-0x000000001B560000-0x000000001B5E0000-memory.dmp
    Filesize

    512KB

  • memory/988-109-0x000000001B560000-0x000000001B5E0000-memory.dmp
    Filesize

    512KB

  • memory/1712-86-0x0000000000C30000-0x0000000001B98000-memory.dmp
    Filesize

    15.4MB

  • memory/1712-57-0x0000000000C30000-0x0000000001B98000-memory.dmp
    Filesize

    15.4MB

  • memory/1712-58-0x0000000000C30000-0x0000000001B98000-memory.dmp
    Filesize

    15.4MB

  • memory/1712-56-0x0000000000C30000-0x0000000001B98000-memory.dmp
    Filesize

    15.4MB