Analysis

  • max time kernel
    150s
  • max time network
    141s
  • platform
    windows7_x64
  • resource
    win7-en-20211104
  • submitted
    13-11-2021 09:39

General

  • Target

    Shipment Documents (BL,PL & INV).xlsx

  • Size

    227KB

  • MD5

    8580b837d36557eb8c3f427d09516ac2

  • SHA1

    6be039af32e0308859330f02679d90fcaf2c1a7a

  • SHA256

    4d42a8ac965539112d0afb5f75d6c2c28f44d80d8441bdb3a4ab890275d9cd84

  • SHA512

    7e98d79c29fa709417197a0bb06a9ae91a29daadb7787a932c2151c4cd16e587a6b24497b5a1e83bc502350339f11a43194c035a09e16613f3b717ba3b39bbe8

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

kzk9

C2

http://www.yourmajordomo.com/kzk9/

Decoy

tianconghuo.club

1996-page.com

ourtownmax.net

conservativetreehose.com

synth.repair

donnachicacreperia.com

tentfull.com

weapp.download

surfersink.com

gattlebusinessservices.com

sebastian249.com

anhphuc.company

betternatureproducts.net

defroplate.com

seattlesquidsquad.com

polarjob.com

lendingadvantage.com

angelsondope.com

goportjitney.com

tiendagrupojagr.com

Signatures

  • Formbook

    Formbook is a data stealing malware which is capable of stealing data.

  • Formbook Payload 3 IoCs
  • Blocklisted process makes network request 1 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 4 IoCs
  • Uses the VBS compiler for execution 1 TTPs
  • Suspicious use of SetThreadContext 3 IoCs
  • Enumerates system info in registry 2 TTPs 1 IoCs
  • Launches Equation Editor 1 TTPs 1 IoCs

    Equation Editor is an old Office component often targeted by exploits such as CVE-2017-11882.

  • Modifies Internet Explorer settings 1 TTPs 31 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 23 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 7 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of SendNotifyMessage 2 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 19 IoCs

Processes

  • C:\Windows\Explorer.EXE
    C:\Windows\Explorer.EXE
    1⤵
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of WriteProcessMemory
    PID:1360
    • C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
      "C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde "C:\Users\Admin\AppData\Local\Temp\Shipment Documents (BL,PL & INV).xlsx"
      2⤵
      • Enumerates system info in registry
      • Modifies Internet Explorer settings
      • Modifies registry class
      • Suspicious behavior: AddClipboardFormatListener
      • Suspicious use of SetWindowsHookEx
      PID:656
    • C:\Windows\SysWOW64\control.exe
      "C:\Windows\SysWOW64\control.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:668
      • C:\Windows\SysWOW64\cmd.exe
        /c del "C:\Users\Public\vbc.exe"
        3⤵
          PID:1120
    • C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE
      "C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding
      1⤵
      • Blocklisted process makes network request
      • Loads dropped DLL
      • Launches Equation Editor
      • Suspicious use of WriteProcessMemory
      PID:1944
      • C:\Users\Public\vbc.exe
        "C:\Users\Public\vbc.exe"
        2⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1092
        • C:\Users\Public\vbc.exe
          "C:\Users\Public\vbc.exe"
          3⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious behavior: MapViewOfSection
          • Suspicious use of AdjustPrivilegeToken
          PID:1260

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Execution

    Scripting

    1
    T1064

    Exploitation for Client Execution

    1
    T1203

    Defense Evasion

    Scripting

    1
    T1064

    Modify Registry

    1
    T1112

    Discovery

    Query Registry

    1
    T1012

    System Information Discovery

    1
    T1082

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Public\vbc.exe
      MD5

      7d22b7632fc02e12438e7748eca086b4

      SHA1

      e7e9f311c61a9aa1537053e96f9b8f5273c47dee

      SHA256

      7a1b8316f5ab5e580a39374469dd8029949c791b6ac33627b3824868bd5aaf28

      SHA512

      fdb1785372411642b8479bc54b83262a04cdc78fb4ca372fb6d81b0e0c876b06a3b83475a6d7d41f103bf4c2285bab08b67ce70bde6f4fef2d9f8c70b6cbad3f

    • C:\Users\Public\vbc.exe
      MD5

      7d22b7632fc02e12438e7748eca086b4

      SHA1

      e7e9f311c61a9aa1537053e96f9b8f5273c47dee

      SHA256

      7a1b8316f5ab5e580a39374469dd8029949c791b6ac33627b3824868bd5aaf28

      SHA512

      fdb1785372411642b8479bc54b83262a04cdc78fb4ca372fb6d81b0e0c876b06a3b83475a6d7d41f103bf4c2285bab08b67ce70bde6f4fef2d9f8c70b6cbad3f

    • C:\Users\Public\vbc.exe
      MD5

      7d22b7632fc02e12438e7748eca086b4

      SHA1

      e7e9f311c61a9aa1537053e96f9b8f5273c47dee

      SHA256

      7a1b8316f5ab5e580a39374469dd8029949c791b6ac33627b3824868bd5aaf28

      SHA512

      fdb1785372411642b8479bc54b83262a04cdc78fb4ca372fb6d81b0e0c876b06a3b83475a6d7d41f103bf4c2285bab08b67ce70bde6f4fef2d9f8c70b6cbad3f

    • \Users\Public\vbc.exe
      MD5

      7d22b7632fc02e12438e7748eca086b4

      SHA1

      e7e9f311c61a9aa1537053e96f9b8f5273c47dee

      SHA256

      7a1b8316f5ab5e580a39374469dd8029949c791b6ac33627b3824868bd5aaf28

      SHA512

      fdb1785372411642b8479bc54b83262a04cdc78fb4ca372fb6d81b0e0c876b06a3b83475a6d7d41f103bf4c2285bab08b67ce70bde6f4fef2d9f8c70b6cbad3f

    • \Users\Public\vbc.exe
      MD5

      7d22b7632fc02e12438e7748eca086b4

      SHA1

      e7e9f311c61a9aa1537053e96f9b8f5273c47dee

      SHA256

      7a1b8316f5ab5e580a39374469dd8029949c791b6ac33627b3824868bd5aaf28

      SHA512

      fdb1785372411642b8479bc54b83262a04cdc78fb4ca372fb6d81b0e0c876b06a3b83475a6d7d41f103bf4c2285bab08b67ce70bde6f4fef2d9f8c70b6cbad3f

    • \Users\Public\vbc.exe
      MD5

      7d22b7632fc02e12438e7748eca086b4

      SHA1

      e7e9f311c61a9aa1537053e96f9b8f5273c47dee

      SHA256

      7a1b8316f5ab5e580a39374469dd8029949c791b6ac33627b3824868bd5aaf28

      SHA512

      fdb1785372411642b8479bc54b83262a04cdc78fb4ca372fb6d81b0e0c876b06a3b83475a6d7d41f103bf4c2285bab08b67ce70bde6f4fef2d9f8c70b6cbad3f

    • \Users\Public\vbc.exe
      MD5

      7d22b7632fc02e12438e7748eca086b4

      SHA1

      e7e9f311c61a9aa1537053e96f9b8f5273c47dee

      SHA256

      7a1b8316f5ab5e580a39374469dd8029949c791b6ac33627b3824868bd5aaf28

      SHA512

      fdb1785372411642b8479bc54b83262a04cdc78fb4ca372fb6d81b0e0c876b06a3b83475a6d7d41f103bf4c2285bab08b67ce70bde6f4fef2d9f8c70b6cbad3f

    • memory/656-55-0x000000002F6F1000-0x000000002F6F4000-memory.dmp
      Filesize

      12KB

    • memory/656-56-0x0000000071B61000-0x0000000071B63000-memory.dmp
      Filesize

      8KB

    • memory/656-57-0x000000005FFF0000-0x0000000060000000-memory.dmp
      Filesize

      64KB

    • memory/656-88-0x000000005FFF0000-0x0000000060000000-memory.dmp
      Filesize

      64KB

    • memory/668-87-0x0000000000870000-0x0000000000903000-memory.dmp
      Filesize

      588KB

    • memory/668-84-0x0000000000080000-0x00000000000AE000-memory.dmp
      Filesize

      184KB

    • memory/668-83-0x0000000000B80000-0x0000000000B9F000-memory.dmp
      Filesize

      124KB

    • memory/668-86-0x0000000001FA0000-0x00000000022A3000-memory.dmp
      Filesize

      3.0MB

    • memory/668-81-0x0000000000000000-mapping.dmp
    • memory/1092-71-0x0000000004C00000-0x0000000004C4A000-memory.dmp
      Filesize

      296KB

    • memory/1092-70-0x0000000000640000-0x0000000000645000-memory.dmp
      Filesize

      20KB

    • memory/1092-63-0x0000000000000000-mapping.dmp
    • memory/1092-66-0x0000000001020000-0x0000000001021000-memory.dmp
      Filesize

      4KB

    • memory/1092-69-0x0000000004BC0000-0x0000000004BC1000-memory.dmp
      Filesize

      4KB

    • memory/1120-85-0x0000000000000000-mapping.dmp
    • memory/1260-79-0x00000000001E0000-0x00000000001F4000-memory.dmp
      Filesize

      80KB

    • memory/1260-72-0x0000000000400000-0x000000000042E000-memory.dmp
      Filesize

      184KB

    • memory/1260-78-0x0000000000A00000-0x0000000000D03000-memory.dmp
      Filesize

      3.0MB

    • memory/1260-75-0x000000000041EB80-mapping.dmp
    • memory/1260-73-0x0000000000400000-0x000000000042E000-memory.dmp
      Filesize

      184KB

    • memory/1260-74-0x0000000000400000-0x000000000042E000-memory.dmp
      Filesize

      184KB

    • memory/1360-80-0x0000000007220000-0x000000000737E000-memory.dmp
      Filesize

      1.4MB

    • memory/1360-89-0x0000000007D50000-0x0000000007E8A000-memory.dmp
      Filesize

      1.2MB

    • memory/1944-58-0x0000000075801000-0x0000000075803000-memory.dmp
      Filesize

      8KB