Analysis

  • max time kernel
    148s
  • max time network
    149s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    25-03-2021 17:04

General

  • Target

    cessentl1.dll

  • Size

    449KB

  • MD5

    caec766872f0fc3c7e4af0bf1e5cc939

  • SHA1

    dfb603663f5de381eafb617dccf51a2c30f34a4d

  • SHA256

    afe4ae071261d7c5e03b4e96e253182a270d1e2c4f772d4d947e5d5cf3005984

  • SHA512

    aa22e020c44220258aabf0950de87846860c4a7bea1a6e9c50f2a7fa6ca537952398b2322acab8a24c75424cabc1466cf00714d884db4f2252bf60b586e0ecf1

Malware Config

Extracted

Family

gozi_rm3

Botnet

210301

C2

https://gotoregt.space

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.

  • Blocklisted process makes network request 1 IoCs
  • Modifies Internet Explorer settings 1 TTPs 64 IoCs
  • Suspicious use of FindShellTrayWindow 7 IoCs
  • Suspicious use of SetWindowsHookEx 28 IoCs
  • Suspicious use of WriteProcessMemory 24 IoCs

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\cessentl1.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:4688
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\cessentl1.dll,#1
      2⤵
      • Blocklisted process makes network request
      PID:4736
  • 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:640
    • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
      "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:640 CREDAT:82945 /prefetch:2
      2⤵
      • Modifies Internet Explorer settings
      • Suspicious use of SetWindowsHookEx
      PID:972
  • 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:1760
    • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
      "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:1760 CREDAT:82945 /prefetch:2
      2⤵
      • Modifies Internet Explorer settings
      • Suspicious use of SetWindowsHookEx
      PID:2120
  • 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:4392
    • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
      "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:4392 CREDAT:82945 /prefetch:2
      2⤵
      • Suspicious use of SetWindowsHookEx
      PID:4492
  • 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:2684
    • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
      "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:2684 CREDAT:82945 /prefetch:2
      2⤵
      • Modifies Internet Explorer settings
      • Suspicious use of SetWindowsHookEx
      PID:2944
  • 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:2692
    • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
      "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:2692 CREDAT:82945 /prefetch:2
      2⤵
      • Suspicious use of SetWindowsHookEx
      PID:4672
  • 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:4668
    • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
      "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:4668 CREDAT:82945 /prefetch:2
      2⤵
      • Modifies Internet Explorer settings
      • Suspicious use of SetWindowsHookEx
      PID:1528
  • 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:4116
    • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
      "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:4116 CREDAT:82945 /prefetch:2
      2⤵
      • Suspicious use of SetWindowsHookEx
      PID:4200

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

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

    MD5

    50d07e64e3238da3764e519781a4c457

    SHA1

    df7812d8516572253185a1a09440450a7719ec1d

    SHA256

    2d6e623cbde0b5632db298f854119721d4974159da4125481674bfb41c61688e

    SHA512

    7628988e2822282b47c3796238bd87aac5b73e596fa4b5bfa57746890bc2cddc0e0fb445ddc27b1431c029bcd5d1787f64adb7f777583e7d097a8095832ceb48

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

    MD5

    9ccee172df2683b823854a0b9daed7f1

    SHA1

    9f51c662571923704956999fb359ec74fe910c1a

    SHA256

    1a6f0ed326106ce7fbd74a68ae850698b2f0a08ddbaa5a13dbe8041882475e2c

    SHA512

    13124eb88f0206d28d09be17880626f39e885d997b05c42f1fbad0e6b40d6afee7ad29884aad10a66a4f071724aeb527ca974ac295053fd4fee9c40e3e663fde

  • memory/972-6-0x0000000000000000-mapping.dmp

  • memory/1528-13-0x0000000000000000-mapping.dmp

  • memory/2120-7-0x0000000000000000-mapping.dmp

  • memory/2944-11-0x0000000000000000-mapping.dmp

  • memory/4200-14-0x0000000000000000-mapping.dmp

  • memory/4492-10-0x0000000000000000-mapping.dmp

  • memory/4672-12-0x0000000000000000-mapping.dmp

  • memory/4736-5-0x0000000000DC0000-0x0000000000DC1000-memory.dmp

    Filesize

    4KB

  • memory/4736-4-0x0000000004290000-0x00000000042A3000-memory.dmp

    Filesize

    76KB

  • memory/4736-2-0x0000000000000000-mapping.dmp

  • memory/4736-3-0x0000000074370000-0x000000007437F000-memory.dmp

    Filesize

    60KB