Analysis

  • max time kernel
    149s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7v20210410
  • 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 39 IoCs

Processes

  • C:\Windows\system32\regsvr32.exe
    regsvr32 /s C:\Users\Admin\AppData\Local\Temp\ursnif_23032021.dll
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2020
    • C:\Windows\SysWOW64\regsvr32.exe
      /s C:\Users\Admin\AppData\Local\Temp\ursnif_23032021.dll
      2⤵
        PID:1268
    • 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:584
      • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
        "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:584 CREDAT:275457 /prefetch:2
        2⤵
        • Suspicious use of SetWindowsHookEx
        PID:336
    • 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:1512
      • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
        "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:1512 CREDAT:275457 /prefetch:2
        2⤵
        • Suspicious use of SetWindowsHookEx
        PID:1716
    • 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:1660
      • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
        "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:1660 CREDAT:275457 /prefetch:2
        2⤵
        • Modifies Internet Explorer settings
        • Suspicious use of SetWindowsHookEx
        PID:1548
    • 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:1512
      • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
        "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:1512 CREDAT:275457 /prefetch:2
        2⤵
        • Modifies Internet Explorer settings
        • Suspicious use of SetWindowsHookEx
        PID:1492
    • 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:1960
      • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
        "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:1960 CREDAT:275457 /prefetch:2
        2⤵
        • Suspicious use of SetWindowsHookEx
        PID:1016
    • 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:1620
      • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
        "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:1620 CREDAT:275457 /prefetch:2
        2⤵
        • Modifies Internet Explorer settings
        • Suspicious use of SetWindowsHookEx
        PID:1616
    • 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:1216
      • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
        "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:1216 CREDAT:275457 /prefetch:2
        2⤵
        • Modifies Internet Explorer settings
        • Suspicious use of SetWindowsHookEx
        PID:400
    • 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:660
      • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
        "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:660 CREDAT:275457 /prefetch:2
        2⤵
        • Suspicious use of SetWindowsHookEx
        PID:1996

    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

      a326af7df7d20ebd8b97452355c7ac2b

      SHA1

      14fce5939455e9e7d1188498310c7e0c7d7ab117

      SHA256

      957d73e1b134928ef6533ce6378c26b0204269fbf12541209fe5ed448fec9159

      SHA512

      45b51cfe5e968479736465e307e71ff396c2e78894626f3d075877c4fcb70eacdbc0fac7f1772ac6120b799c15ff27affd7379391752f19dbe8a30f7063977d7

    • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
      MD5

      de025e14c6490bf693ce8c938977341f

      SHA1

      ec384cd1d0907954dce7adbd077ea6e084ec2885

      SHA256

      28b2e03455a4e5b394963ea256e2649476fc353025db4cbc15498603550b1baa

      SHA512

      52c589302863501a983c0e38310d4c45f5bbf3e5bcb5c515566f9e010e748548b6f53cad28f3efdd428627e4943ebfe92f961132024ff8a0239dc9456fa24a03

    • C:\Users\Admin\AppData\Local\Microsoft\Internet Explorer\imagestore\sgyae4t\imagestore.dat
      MD5

      736fcb05be274e16c6faf8c734b69f63

      SHA1

      ef2a1daedd1169ebf784374bc04ee8aa038541eb

      SHA256

      8e92faf21a7fe45109c82426e03cb7a35950dea44763c263a55e71011c8e6385

      SHA512

      a14b0c0108de7deabd0d9c4e62ddf53f0fb2b34595fc5610b5d37f016e202200acfaca92520c111057754d6106467a01d95ed69dc5917c07ab1b44ae90cff75c

    • C:\Users\Admin\AppData\Local\Microsoft\Internet Explorer\imagestore\sgyae4t\imagestore.dat
      MD5

      736fcb05be274e16c6faf8c734b69f63

      SHA1

      ef2a1daedd1169ebf784374bc04ee8aa038541eb

      SHA256

      8e92faf21a7fe45109c82426e03cb7a35950dea44763c263a55e71011c8e6385

      SHA512

      a14b0c0108de7deabd0d9c4e62ddf53f0fb2b34595fc5610b5d37f016e202200acfaca92520c111057754d6106467a01d95ed69dc5917c07ab1b44ae90cff75c

    • C:\Users\Admin\AppData\Local\Microsoft\Internet Explorer\imagestore\sgyae4t\imagestore.dat
      MD5

      736fcb05be274e16c6faf8c734b69f63

      SHA1

      ef2a1daedd1169ebf784374bc04ee8aa038541eb

      SHA256

      8e92faf21a7fe45109c82426e03cb7a35950dea44763c263a55e71011c8e6385

      SHA512

      a14b0c0108de7deabd0d9c4e62ddf53f0fb2b34595fc5610b5d37f016e202200acfaca92520c111057754d6106467a01d95ed69dc5917c07ab1b44ae90cff75c

    • C:\Users\Admin\AppData\Local\Microsoft\Internet Explorer\imagestore\sgyae4t\imagestore.dat
      MD5

      736fcb05be274e16c6faf8c734b69f63

      SHA1

      ef2a1daedd1169ebf784374bc04ee8aa038541eb

      SHA256

      8e92faf21a7fe45109c82426e03cb7a35950dea44763c263a55e71011c8e6385

      SHA512

      a14b0c0108de7deabd0d9c4e62ddf53f0fb2b34595fc5610b5d37f016e202200acfaca92520c111057754d6106467a01d95ed69dc5917c07ab1b44ae90cff75c

    • C:\Users\Admin\AppData\Local\Microsoft\Internet Explorer\imagestore\sgyae4t\imagestore.dat
      MD5

      736fcb05be274e16c6faf8c734b69f63

      SHA1

      ef2a1daedd1169ebf784374bc04ee8aa038541eb

      SHA256

      8e92faf21a7fe45109c82426e03cb7a35950dea44763c263a55e71011c8e6385

      SHA512

      a14b0c0108de7deabd0d9c4e62ddf53f0fb2b34595fc5610b5d37f016e202200acfaca92520c111057754d6106467a01d95ed69dc5917c07ab1b44ae90cff75c

    • C:\Users\Admin\AppData\Local\Microsoft\Internet Explorer\imagestore\sgyae4t\imagestore.dat
      MD5

      736fcb05be274e16c6faf8c734b69f63

      SHA1

      ef2a1daedd1169ebf784374bc04ee8aa038541eb

      SHA256

      8e92faf21a7fe45109c82426e03cb7a35950dea44763c263a55e71011c8e6385

      SHA512

      a14b0c0108de7deabd0d9c4e62ddf53f0fb2b34595fc5610b5d37f016e202200acfaca92520c111057754d6106467a01d95ed69dc5917c07ab1b44ae90cff75c

    • memory/336-65-0x0000000000000000-mapping.dmp
    • memory/400-85-0x0000000000000000-mapping.dmp
    • memory/1016-81-0x0000000000000000-mapping.dmp
    • memory/1268-62-0x0000000000390000-0x00000000003A3000-memory.dmp
      Filesize

      76KB

    • memory/1268-61-0x0000000076281000-0x0000000076283000-memory.dmp
      Filesize

      8KB

    • memory/1268-60-0x0000000000000000-mapping.dmp
    • memory/1268-67-0x00000000003B0000-0x00000000003B2000-memory.dmp
      Filesize

      8KB

    • memory/1492-79-0x0000000000450000-0x0000000000452000-memory.dmp
      Filesize

      8KB

    • memory/1492-77-0x0000000000000000-mapping.dmp
    • memory/1548-75-0x0000000000000000-mapping.dmp
    • memory/1616-83-0x0000000000000000-mapping.dmp
    • memory/1716-68-0x0000000000000000-mapping.dmp
    • memory/1996-89-0x0000000000000000-mapping.dmp
    • memory/1996-91-0x00000000003E0000-0x00000000003E2000-memory.dmp
      Filesize

      8KB

    • memory/2020-59-0x000007FEFC141000-0x000007FEFC143000-memory.dmp
      Filesize

      8KB