Analysis

  • max time kernel
    149s
  • max time network
    149s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    23-04-2021 16:39

General

  • Target

    ursnif_23032021.dll

  • Size

    60KB

  • MD5

    fd52ace064492971c79ae679d1326aef

  • SHA1

    b8fb62eaf0415586a1949863c1981d543199179b

  • SHA256

    d160a82b9eb5124d9a5da6ded92f40635464cbcdf357feb471a7e87fc56a8339

  • SHA512

    1249c6d8f72e45631d47bf27489761963bd2148e0c0ec1743973bbf386268cd2a9be65bc8fa6d1d9a38ada8b35e8e78f6f02a0780af12d50c461ddeec12ca10b

Malware Config

Extracted

Family

gozi_rm3

Attributes
  • exe_type

    loader

Extracted

Family

gozi_rm3

Botnet

210307

C2

https://thetopdomain.xyz

Attributes
  • build

    300960

  • exe_type

    loader

  • non_target_locale

    RU

  • server_id

    12

  • url_path

    index.htm

rsa_pubkey.plain
serpent.plain

Signatures

  • Gozi RM3

    A heavily modified version of Gozi using RM3 loader.

  • Modifies Internet Explorer settings 1 TTPs 64 IoCs
  • Suspicious use of FindShellTrayWindow 8 IoCs
  • Suspicious use of SetWindowsHookEx 32 IoCs
  • Suspicious use of WriteProcessMemory 27 IoCs

Processes

  • C:\Windows\system32\regsvr32.exe
    regsvr32 /s C:\Users\Admin\AppData\Local\Temp\ursnif_23032021.dll
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:764
    • C:\Windows\SysWOW64\regsvr32.exe
      /s C:\Users\Admin\AppData\Local\Temp\ursnif_23032021.dll
      2⤵
        PID:1776
    • C:\Program Files\Internet Explorer\iexplore.exe
      "C:\Program Files\Internet Explorer\iexplore.exe" -Embedding
      1⤵
      • Modifies Internet Explorer settings
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:204
      • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
        "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:204 CREDAT:82945 /prefetch:2
        2⤵
        • Modifies Internet Explorer settings
        • Suspicious use of SetWindowsHookEx
        PID:3036
    • C:\Program Files\Internet Explorer\iexplore.exe
      "C:\Program Files\Internet Explorer\iexplore.exe" -Embedding
      1⤵
      • Modifies Internet Explorer settings
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2276
      • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
        "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:2276 CREDAT:82945 /prefetch:2
        2⤵
        • Suspicious use of SetWindowsHookEx
        PID:1868
    • C:\Program Files\Internet Explorer\iexplore.exe
      "C:\Program Files\Internet Explorer\iexplore.exe" -Embedding
      1⤵
      • Modifies Internet Explorer settings
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2272
      • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
        "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:2272 CREDAT:82945 /prefetch:2
        2⤵
        • Suspicious use of SetWindowsHookEx
        PID:2936
    • C:\Program Files\Internet Explorer\iexplore.exe
      "C:\Program Files\Internet Explorer\iexplore.exe" -Embedding
      1⤵
      • Modifies Internet Explorer settings
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2264
      • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
        "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:2264 CREDAT:82945 /prefetch:2
        2⤵
        • Suspicious use of SetWindowsHookEx
        PID:1216
    • C:\Program Files\Internet Explorer\iexplore.exe
      "C:\Program Files\Internet Explorer\iexplore.exe" -Embedding
      1⤵
      • Modifies Internet Explorer settings
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:3948
      • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
        "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:3948 CREDAT:82945 /prefetch:2
        2⤵
        • Modifies Internet Explorer settings
        • Suspicious use of SetWindowsHookEx
        PID:2136
    • C:\Program Files\Internet Explorer\iexplore.exe
      "C:\Program Files\Internet Explorer\iexplore.exe" -Embedding
      1⤵
      • Modifies Internet Explorer settings
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1040
      • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
        "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:1040 CREDAT:82945 /prefetch:2
        2⤵
        • Modifies Internet Explorer settings
        • Suspicious use of SetWindowsHookEx
        PID:4028
    • C:\Program Files\Internet Explorer\iexplore.exe
      "C:\Program Files\Internet Explorer\iexplore.exe" -Embedding
      1⤵
      • Modifies Internet Explorer settings
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:936
      • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
        "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:936 CREDAT:82945 /prefetch:2
        2⤵
        • Modifies Internet Explorer settings
        • Suspicious use of SetWindowsHookEx
        PID:968
    • C:\Program Files\Internet Explorer\iexplore.exe
      "C:\Program Files\Internet Explorer\iexplore.exe" -Embedding
      1⤵
      • Modifies Internet Explorer settings
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:3380
      • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
        "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:3380 CREDAT:82945 /prefetch:2
        2⤵
        • Modifies Internet Explorer settings
        • Suspicious use of SetWindowsHookEx
        PID:2688

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Defense Evasion

    Modify Registry

    1
    T1112

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\644B8874112055B5E195ECB0E8F243A4
      MD5

      d1b1f562e42dd37c408c0a3c7ccfe189

      SHA1

      c01e61a5c5f44fb038228b7e542f6a8d7c8c283d

      SHA256

      7f468f04fe5a1b0616685f157a4285090b6ed3858d4cd9efe915aaeed83c158e

      SHA512

      404d279fabd4886008e47e9138f799cf398f0aa4c8556192d6e45dbcde99eac2cd65c47b9e0b88bd6d3a6529818f6048a23a197a913fb917b19dffbbd5d75850

    • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\644B8874112055B5E195ECB0E8F243A4
      MD5

      066630edd3d05079f098db7a5b76b637

      SHA1

      52c7cf3fe2a9e5c5db48d43c49d035dcdc12dfe8

      SHA256

      9539be1660033dc59e93ab21fd4cb1b2a9f59bec94a0d49b5e4c44a7bec7afac

      SHA512

      6ae8ba4e442349d0fcf747c1fecffeb216a0cd48c5c7c83273032ece32a5da8ca2e4ea064a42cb9386240e22cc0ffaa895da1e7dfdf4acf17392124b8acd73a8

    • memory/204-118-0x00007FF9BC1B0000-0x00007FF9BC21B000-memory.dmp
      Filesize

      428KB

    • memory/936-132-0x00007FF9CBBF0000-0x00007FF9CBC5B000-memory.dmp
      Filesize

      428KB

    • memory/968-133-0x0000000000000000-mapping.dmp
    • memory/1040-130-0x00007FF9CBBF0000-0x00007FF9CBC5B000-memory.dmp
      Filesize

      428KB

    • memory/1216-127-0x0000000000000000-mapping.dmp
    • memory/1776-115-0x00000000009E0000-0x00000000009F3000-memory.dmp
      Filesize

      76KB

    • memory/1776-114-0x0000000000000000-mapping.dmp
    • memory/1868-121-0x0000000000000000-mapping.dmp
    • memory/2136-129-0x0000000000000000-mapping.dmp
    • memory/2264-126-0x00007FF9CBBF0000-0x00007FF9CBC5B000-memory.dmp
      Filesize

      428KB

    • memory/2272-124-0x00007FF9CBBF0000-0x00007FF9CBC5B000-memory.dmp
      Filesize

      428KB

    • memory/2276-120-0x00007FF9CBBF0000-0x00007FF9CBC5B000-memory.dmp
      Filesize

      428KB

    • memory/2688-135-0x0000000000000000-mapping.dmp
    • memory/2936-125-0x0000000000000000-mapping.dmp
    • memory/3036-119-0x0000000000000000-mapping.dmp
    • memory/3380-134-0x00007FF9CD710000-0x00007FF9CD77B000-memory.dmp
      Filesize

      428KB

    • memory/3948-128-0x00007FF9CBBF0000-0x00007FF9CBC5B000-memory.dmp
      Filesize

      428KB

    • memory/4028-131-0x0000000000000000-mapping.dmp