Analysis

  • max time kernel
    150s
  • max time network
    173s
  • platform
    windows7_x64
  • resource
    win7-en-20210920
  • submitted
    18-10-2021 09:25

General

  • Target

    4fa1176e4a82538dcb691fb8dbc210429f7b7ac6897ad9ef471f6e90bb29ee91.exe

  • Size

    110KB

  • MD5

    40dfeb7c26a3f4a296964cc4c4a3eee2

  • SHA1

    495b2d5b638bf71f3515f1e5ebf23a6225745479

  • SHA256

    4fa1176e4a82538dcb691fb8dbc210429f7b7ac6897ad9ef471f6e90bb29ee91

  • SHA512

    508efa51ef55a4ed1ce09a24a23a646e5a0dcaa35ad41ca9bb382666d4a2e6ccc1e5d97452491771b709d263602c572abcdbe877c58ad2c1e4da182505d43422

Score
10/10

Malware Config

Signatures

  • xmrig

    XMRig is a high performance, open source, cross platform CPU/GPU miner.

  • Executes dropped EXE 1 IoCs
  • Deletes itself 1 IoCs
  • Drops file in System32 directory 18 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Modifies data under HKEY_USERS 64 IoCs
  • Modifies system certificate store 2 TTPs 4 IoCs
  • Suspicious behavior: EnumeratesProcesses 41 IoCs
  • Suspicious use of UnmapMainImage 2 IoCs
  • Suspicious use of WriteProcessMemory 10 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\4fa1176e4a82538dcb691fb8dbc210429f7b7ac6897ad9ef471f6e90bb29ee91.exe
    "C:\Users\Admin\AppData\Local\Temp\4fa1176e4a82538dcb691fb8dbc210429f7b7ac6897ad9ef471f6e90bb29ee91.exe"
    1⤵
    • Drops file in System32 directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of UnmapMainImage
    • Suspicious use of WriteProcessMemory
    PID:1132
    • C:\Windows\SysWOW64\cmd.exe
      /c del C:\Users\Admin\AppData\Local\Temp\4fa1176e4a82538dcb691fb8dbc210429f7b7ac6897ad9ef471f6e90bb29ee91.exe >> NUL
      2⤵
      • Deletes itself
      PID:764
  • C:\Windows\SysWOW64\WinSrv.exe
    C:\Windows\SysWOW64\WinSrv.exe
    1⤵
    • Executes dropped EXE
    • Drops file in System32 directory
    • Suspicious use of SetThreadContext
    • Modifies data under HKEY_USERS
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of UnmapMainImage
    • Suspicious use of WriteProcessMemory
    PID:1680
    • C:\Windows\SysWOW64\svchost.exe
      C:\Windows\System32\svchost.exe
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      PID:840

Network

MITRE ATT&CK Matrix ATT&CK v6

Defense Evasion

Install Root Certificate

1
T1130

Modify Registry

1
T1112

Replay Monitor

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Downloads

  • C:\Windows\SysWOW64\WinSrv.exe
    MD5

    40dfeb7c26a3f4a296964cc4c4a3eee2

    SHA1

    495b2d5b638bf71f3515f1e5ebf23a6225745479

    SHA256

    4fa1176e4a82538dcb691fb8dbc210429f7b7ac6897ad9ef471f6e90bb29ee91

    SHA512

    508efa51ef55a4ed1ce09a24a23a646e5a0dcaa35ad41ca9bb382666d4a2e6ccc1e5d97452491771b709d263602c572abcdbe877c58ad2c1e4da182505d43422

  • C:\Windows\SysWOW64\WinSrv.exe
    MD5

    40dfeb7c26a3f4a296964cc4c4a3eee2

    SHA1

    495b2d5b638bf71f3515f1e5ebf23a6225745479

    SHA256

    4fa1176e4a82538dcb691fb8dbc210429f7b7ac6897ad9ef471f6e90bb29ee91

    SHA512

    508efa51ef55a4ed1ce09a24a23a646e5a0dcaa35ad41ca9bb382666d4a2e6ccc1e5d97452491771b709d263602c572abcdbe877c58ad2c1e4da182505d43422

  • memory/764-59-0x0000000000000000-mapping.dmp
  • memory/840-56-0x0000000000400000-0x000000000040B000-memory.dmp
    Filesize

    44KB

  • memory/840-58-0x000000000040178D-mapping.dmp
  • memory/840-57-0x0000000000400000-0x000000000040B000-memory.dmp
    Filesize

    44KB

  • memory/1132-54-0x0000000000400000-0x000000000041F000-memory.dmp
    Filesize

    124KB

  • memory/1132-53-0x00000000001C0000-0x00000000001C7000-memory.dmp
    Filesize

    28KB

  • memory/1680-60-0x0000000076851000-0x0000000076853000-memory.dmp
    Filesize

    8KB