Resubmissions

18-04-2024 11:46

240418-nxbcraca34 10

18-04-2024 11:45

240418-nw8a4adb71 10

18-04-2024 11:45

240418-nw7pkadb7x 10

18-04-2024 11:45

240418-nw2tbabh97 10

18-04-2024 11:45

240418-nw17sabh96 10

18-04-2024 10:00

240418-l12m1ahg84 10

Analysis

  • max time kernel
    1801s
  • max time network
    1807s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    18-04-2024 11:46

General

  • Target

    06063b690db71cc96cc36b528e7a8fa599046491f976e94615392975b96b0d77.exe

  • Size

    192KB

  • MD5

    610b4e85369410c52cd2c1f1c1b304ae

  • SHA1

    1a1288380b4abddb9830ff22541583ba66f76f2c

  • SHA256

    06063b690db71cc96cc36b528e7a8fa599046491f976e94615392975b96b0d77

  • SHA512

    46deda3922aff6aed04591aac09be1408798fc8e6d58ace5f9dca92ec33583b86ecf4b1fe52696f8128fd50cc27f14485cdc1bd51339788964d39f323d171c3a

  • SSDEEP

    3072:rf1BDZ0kVB67Duw9AMc+bP1Yf0wK8F78CrLFOmvJfnah+vbkWS90tqNu/mOspgI:r9X0GgP1k0I84Loafnah+TJqNfppJ

Malware Config

Extracted

Family

systembc

C2

172.104.63.157:4001

Signatures

  • SystemBC

    SystemBC is a proxy and remote administration tool first seen in 2019.

  • Contacts a large (912) amount of remote hosts 1 TTPs

    This may indicate a network scan to discover remotely running services.

  • Executes dropped EXE 30 IoCs
  • Loads dropped DLL 16 IoCs
  • Unexpected DNS network traffic destination 2 IoCs

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

  • Looks up external IP address via web service 4 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Uses Tor communications 1 TTPs

    Malware can proxy its traffic through Tor for more anonymity.

  • Drops file in System32 directory 15 IoCs
  • Suspicious use of SetThreadContext 16 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • NSIS installer 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious behavior: MapViewOfSection 16 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\06063b690db71cc96cc36b528e7a8fa599046491f976e94615392975b96b0d77.exe
    "C:\Users\Admin\AppData\Local\Temp\06063b690db71cc96cc36b528e7a8fa599046491f976e94615392975b96b0d77.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of SetThreadContext
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of WriteProcessMemory
    PID:2188
    • C:\Users\Admin\AppData\Local\Temp\06063b690db71cc96cc36b528e7a8fa599046491f976e94615392975b96b0d77.exe
      "C:\Users\Admin\AppData\Local\Temp\06063b690db71cc96cc36b528e7a8fa599046491f976e94615392975b96b0d77.exe"
      2⤵
      • Drops file in Windows directory
      • Suspicious behavior: EnumeratesProcesses
      PID:2612
  • C:\Windows\system32\taskeng.exe
    taskeng.exe {F9ABD2E2-39C7-49C8-BBE2-9A3DD9AA9A8E} S-1-5-18:NT AUTHORITY\System:Service:
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2688
    • C:\ProgramData\nuvxq\iwxnlg.exe
      C:\ProgramData\nuvxq\iwxnlg.exe start
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in System32 directory
      • Suspicious use of SetThreadContext
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of WriteProcessMemory
      PID:2652
      • C:\ProgramData\nuvxq\iwxnlg.exe
        C:\ProgramData\nuvxq\iwxnlg.exe start
        3⤵
        • Executes dropped EXE
        PID:1400
    • C:\ProgramData\nuvxq\iwxnlg.exe
      C:\ProgramData\nuvxq\iwxnlg.exe start
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in System32 directory
      • Suspicious use of SetThreadContext
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of WriteProcessMemory
      PID:2448
      • C:\ProgramData\nuvxq\iwxnlg.exe
        C:\ProgramData\nuvxq\iwxnlg.exe start
        3⤵
        • Executes dropped EXE
        PID:1884
    • C:\ProgramData\nuvxq\iwxnlg.exe
      C:\ProgramData\nuvxq\iwxnlg.exe start
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in System32 directory
      • Suspicious use of SetThreadContext
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of WriteProcessMemory
      PID:1976
      • C:\ProgramData\nuvxq\iwxnlg.exe
        C:\ProgramData\nuvxq\iwxnlg.exe start
        3⤵
        • Executes dropped EXE
        PID:884
    • C:\ProgramData\nuvxq\iwxnlg.exe
      C:\ProgramData\nuvxq\iwxnlg.exe start
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in System32 directory
      • Suspicious use of SetThreadContext
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of WriteProcessMemory
      PID:1468
      • C:\ProgramData\nuvxq\iwxnlg.exe
        C:\ProgramData\nuvxq\iwxnlg.exe start
        3⤵
        • Executes dropped EXE
        PID:1660
    • C:\ProgramData\nuvxq\iwxnlg.exe
      C:\ProgramData\nuvxq\iwxnlg.exe start
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in System32 directory
      • Suspicious use of SetThreadContext
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of WriteProcessMemory
      PID:3024
      • C:\ProgramData\nuvxq\iwxnlg.exe
        C:\ProgramData\nuvxq\iwxnlg.exe start
        3⤵
        • Executes dropped EXE
        PID:2096
    • C:\ProgramData\nuvxq\iwxnlg.exe
      C:\ProgramData\nuvxq\iwxnlg.exe start
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in System32 directory
      • Suspicious use of SetThreadContext
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of WriteProcessMemory
      PID:1800
      • C:\ProgramData\nuvxq\iwxnlg.exe
        C:\ProgramData\nuvxq\iwxnlg.exe start
        3⤵
        • Executes dropped EXE
        PID:2516
    • C:\ProgramData\nuvxq\iwxnlg.exe
      C:\ProgramData\nuvxq\iwxnlg.exe start
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in System32 directory
      • Suspicious use of SetThreadContext
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of WriteProcessMemory
      PID:1484
      • C:\ProgramData\nuvxq\iwxnlg.exe
        C:\ProgramData\nuvxq\iwxnlg.exe start
        3⤵
        • Executes dropped EXE
        PID:2472
    • C:\ProgramData\nuvxq\iwxnlg.exe
      C:\ProgramData\nuvxq\iwxnlg.exe start
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in System32 directory
      • Suspicious use of SetThreadContext
      • Suspicious behavior: MapViewOfSection
      PID:2984
      • C:\ProgramData\nuvxq\iwxnlg.exe
        C:\ProgramData\nuvxq\iwxnlg.exe start
        3⤵
        • Executes dropped EXE
        PID:2268
    • C:\ProgramData\nuvxq\iwxnlg.exe
      C:\ProgramData\nuvxq\iwxnlg.exe start
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in System32 directory
      • Suspicious use of SetThreadContext
      • Suspicious behavior: MapViewOfSection
      PID:2352
      • C:\ProgramData\nuvxq\iwxnlg.exe
        C:\ProgramData\nuvxq\iwxnlg.exe start
        3⤵
        • Executes dropped EXE
        PID:2800
    • C:\ProgramData\nuvxq\iwxnlg.exe
      C:\ProgramData\nuvxq\iwxnlg.exe start
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in System32 directory
      • Suspicious use of SetThreadContext
      • Suspicious behavior: MapViewOfSection
      PID:1348
      • C:\ProgramData\nuvxq\iwxnlg.exe
        C:\ProgramData\nuvxq\iwxnlg.exe start
        3⤵
        • Executes dropped EXE
        PID:1952
    • C:\ProgramData\nuvxq\iwxnlg.exe
      C:\ProgramData\nuvxq\iwxnlg.exe start
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in System32 directory
      • Suspicious use of SetThreadContext
      • Suspicious behavior: MapViewOfSection
      PID:1744
      • C:\ProgramData\nuvxq\iwxnlg.exe
        C:\ProgramData\nuvxq\iwxnlg.exe start
        3⤵
        • Executes dropped EXE
        PID:2956
    • C:\ProgramData\nuvxq\iwxnlg.exe
      C:\ProgramData\nuvxq\iwxnlg.exe start
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in System32 directory
      • Suspicious use of SetThreadContext
      • Suspicious behavior: MapViewOfSection
      PID:2424
      • C:\ProgramData\nuvxq\iwxnlg.exe
        C:\ProgramData\nuvxq\iwxnlg.exe start
        3⤵
        • Executes dropped EXE
        PID:2928
    • C:\ProgramData\nuvxq\iwxnlg.exe
      C:\ProgramData\nuvxq\iwxnlg.exe start
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in System32 directory
      • Suspicious use of SetThreadContext
      • Suspicious behavior: MapViewOfSection
      PID:2308
      • C:\ProgramData\nuvxq\iwxnlg.exe
        C:\ProgramData\nuvxq\iwxnlg.exe start
        3⤵
        • Executes dropped EXE
        PID:1632
    • C:\ProgramData\nuvxq\iwxnlg.exe
      C:\ProgramData\nuvxq\iwxnlg.exe start
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in System32 directory
      • Suspicious use of SetThreadContext
      • Suspicious behavior: MapViewOfSection
      PID:1940
      • C:\ProgramData\nuvxq\iwxnlg.exe
        C:\ProgramData\nuvxq\iwxnlg.exe start
        3⤵
        • Executes dropped EXE
        PID:456
    • C:\ProgramData\nuvxq\iwxnlg.exe
      C:\ProgramData\nuvxq\iwxnlg.exe start
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in System32 directory
      • Suspicious use of SetThreadContext
      • Suspicious behavior: MapViewOfSection
      PID:2952
      • C:\ProgramData\nuvxq\iwxnlg.exe
        C:\ProgramData\nuvxq\iwxnlg.exe start
        3⤵
        • Executes dropped EXE
        PID:1704

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\ProgramData\nuvxq\iwxnlg.exe

    Filesize

    192KB

    MD5

    610b4e85369410c52cd2c1f1c1b304ae

    SHA1

    1a1288380b4abddb9830ff22541583ba66f76f2c

    SHA256

    06063b690db71cc96cc36b528e7a8fa599046491f976e94615392975b96b0d77

    SHA512

    46deda3922aff6aed04591aac09be1408798fc8e6d58ace5f9dca92ec33583b86ecf4b1fe52696f8128fd50cc27f14485cdc1bd51339788964d39f323d171c3a

  • C:\Windows\SysWOW64\config\systemprofile\AppData\Roaming\528123

    Filesize

    150KB

    MD5

    b76e1d1a677d5ab98d816c5fd5874e9e

    SHA1

    f7482d1b6b5e446f5d11848d40872f790ef671e3

    SHA256

    cd2eb21478199118d1f113b8a5c36b3d3a7e19a4a7d963f48b8df14eba6ea10c

    SHA512

    1ab74e04671abe7d685b6e7100a0a12b78cae00c3bd24c68f0ceebaf8924ee28bb582d4ef74bcd08c1f5e3a309e0468a845a630e118baf0f324a41c663d2a4be

  • \Users\Admin\AppData\Local\Temp\nsj653A.tmp\System.dll

    Filesize

    11KB

    MD5

    fccff8cb7a1067e23fd2e2b63971a8e1

    SHA1

    30e2a9e137c1223a78a0f7b0bf96a1c361976d91

    SHA256

    6fcea34c8666b06368379c6c402b5321202c11b00889401c743fb96c516c679e

    SHA512

    f4335e84e6f8d70e462a22f1c93d2998673a7616c868177cac3e8784a3be1d7d0bb96f2583fa0ed82f4f2b6b8f5d9b33521c279a42e055d80a94b4f3f1791e0c

  • memory/2612-7-0x0000000000400000-0x000000000040B000-memory.dmp

    Filesize

    44KB

  • memory/2612-9-0x0000000000400000-0x000000000040B000-memory.dmp

    Filesize

    44KB

  • memory/2612-11-0x0000000000400000-0x000000000040B000-memory.dmp

    Filesize

    44KB