Resubmissions

19-11-2024 16:46

241119-t9xz6sygrj 10

19-11-2024 03:35

241119-d5v21svmaq 10

Analysis

  • max time kernel
    38s
  • max time network
    39s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    19-11-2024 16:46

General

  • Target

    d3abf557101fe8ce97ea068290f87d24743cbe0bcbc73857e0e3f72edc225c0bN.dll

  • Size

    730KB

  • MD5

    219987362975616dc07d31e5fe0ff420

  • SHA1

    01f77bfc5efebde4e305f47aba4411da661ca7bf

  • SHA256

    d3abf557101fe8ce97ea068290f87d24743cbe0bcbc73857e0e3f72edc225c0b

  • SHA512

    91f215e0629176d1d45c44503c68f535d0e9e409c01193bc74b8c1238a9e9e3a8eb6b021bd542d2275321855e16baaa975c3385c86a563a8bdaf6199f20e9a6f

  • SSDEEP

    6144:o6C5AXbMn7UI1FoV2gwTBlrIckPJYYYYYYYYYYYYi:o6RI1Fo/wT3cJYYYYYYYYYYYYi

Malware Config

Signatures

  • Yunsip

    Remote backdoor which communicates with a C2 server to receive commands.

  • Yunsip family
  • System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

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

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

  • Suspicious behavior: EnumeratesProcesses 35 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of FindShellTrayWindow 60 IoCs
  • Suspicious use of SendNotifyMessage 60 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\d3abf557101fe8ce97ea068290f87d24743cbe0bcbc73857e0e3f72edc225c0bN.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:4252
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\d3abf557101fe8ce97ea068290f87d24743cbe0bcbc73857e0e3f72edc225c0bN.dll,#1
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1652
  • C:\Windows\system32\taskmgr.exe
    "C:\Windows\system32\taskmgr.exe" /4
    1⤵
    • Checks SCSI registry key(s)
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    PID:4412

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • memory/4412-2-0x0000018A70C80000-0x0000018A70C81000-memory.dmp

    Filesize

    4KB

  • memory/4412-0-0x0000018A70C80000-0x0000018A70C81000-memory.dmp

    Filesize

    4KB

  • memory/4412-1-0x0000018A70C80000-0x0000018A70C81000-memory.dmp

    Filesize

    4KB

  • memory/4412-6-0x0000018A70C80000-0x0000018A70C81000-memory.dmp

    Filesize

    4KB

  • memory/4412-12-0x0000018A70C80000-0x0000018A70C81000-memory.dmp

    Filesize

    4KB

  • memory/4412-11-0x0000018A70C80000-0x0000018A70C81000-memory.dmp

    Filesize

    4KB

  • memory/4412-10-0x0000018A70C80000-0x0000018A70C81000-memory.dmp

    Filesize

    4KB

  • memory/4412-9-0x0000018A70C80000-0x0000018A70C81000-memory.dmp

    Filesize

    4KB

  • memory/4412-7-0x0000018A70C80000-0x0000018A70C81000-memory.dmp

    Filesize

    4KB

  • memory/4412-8-0x0000018A70C80000-0x0000018A70C81000-memory.dmp

    Filesize

    4KB