Analysis

  • max time kernel
    143s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7-20230621-en
  • resource tags

    arch:x64arch:x86image:win7-20230621-enlocale:en-usos:windows7-x64system
  • submitted
    01-07-2023 07:01

General

  • Target

    Build1exe.exe

  • Size

    115KB

  • MD5

    bfaa027a645e567824a10a26fb8dbefd

  • SHA1

    4ab52a0b1cc105a5462c2255ef84be9af431b82e

  • SHA256

    c67b6f45d0beb461838f87ca2ad4774b52d7ccf9b0fa36652e8642dc72f43302

  • SHA512

    2f7ab0e4451cfeec017ba294cfcbc6f02d85c756bebce1cf9b3c69f6c77386fe9a21897734c44f4aa32dcaf3a1b7fbaaf0c4639edab1c8961761767a656b4569

  • SSDEEP

    1536:ztCbuEYE+9z2wpuFavGmhMnDIhzZtz20tnh/:5CbuAsEFNmhMnDIhNI0tnh/

Malware Config

Extracted

Family

blackguard

C2

http://94.142.138.111

Signatures

  • BlackGuard

    Infostealer first seen in Late 2021.

  • Downloads MZ/PE file
  • Allows Network login with blank passwords 1 TTPs 1 IoCs

    Allows local user accounts with blank passwords to access device from the network.

  • Executes dropped EXE 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Modifies registry class 10 IoCs
  • Modifies system certificate store 2 TTPs 6 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Build1exe.exe
    "C:\Users\Admin\AppData\Local\Temp\Build1exe.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:828
    • C:\Users\Admin\AppData\Local\Temp\dtsmsys.exe
      "C:\Users\Admin\AppData\Local\Temp\dtsmsys.exe"
      2⤵
      • Allows Network login with blank passwords
      • Executes dropped EXE
      • Accesses Microsoft Outlook profiles
      • Adds Run key to start application
      • Modifies registry class
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • outlook_office_path
      • outlook_win_path
      PID:468

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    344B

    MD5

    e9f91ab715971952f88c4ae15ddbfd17

    SHA1

    a59724f04b9a63834497f64c205b98a1a53cde17

    SHA256

    32166c29aad67ae21077442168436e84f2fdf7999094b1417b12bbd4d419031d

    SHA512

    82fb81794596adbc4bfe3306fdb0c666d92d3982f6eabd3bae13102ec36bc58ff9e13e6ccc2343dfe33ca9eb3499137e5a6446846d15ea03fd7251bc00afe652

  • C:\Users\Admin\AppData\Local\Temp\CabBBD7.tmp

    Filesize

    62KB

    MD5

    3ac860860707baaf32469fa7cc7c0192

    SHA1

    c33c2acdaba0e6fa41fd2f00f186804722477639

    SHA256

    d015145d551ecd14916270efad773bbc9fd57fad2228d2c24559f696c961d904

    SHA512

    d62ad2408c969a95550fb87efda50f988770ba5e39972041bf85924275baf156b8bec309ecc6409e5acdd37ec175dea40eff921ab58933b5b5b5d35a6147567c

  • C:\Users\Admin\AppData\Local\Temp\TarBC38.tmp

    Filesize

    164KB

    MD5

    4ff65ad929cd9a367680e0e5b1c08166

    SHA1

    c0af0d4396bd1f15c45f39d3b849ba444233b3a2

    SHA256

    c8733c93cc5aaf5ca206d06af22ee8dbdec764fb5085019a6a9181feb9dfdee6

    SHA512

    f530dc0d024a5a3b8903ffaaa41b608a5ccdd6da4ba1949f2c2e55a9fca475fec5c8d2119b5763cabe7ef1c3788fb9dcac621869db51d65b1d83cfe404fb4c27

  • C:\Users\Admin\AppData\Local\Temp\dtsmsys.exe

    Filesize

    3.4MB

    MD5

    e695b8888af3b57f1a56961bd289463c

    SHA1

    e8c3892fcf4635a16fe91b9542953e2ac5141df2

    SHA256

    c5a45793d7c361f18d36c190b86c951bf0e7a01ad52132c7e9e9d4101eff73aa

    SHA512

    3c1ba39b7819020ad748bfd8bc0cca01fda5e5c7a2111ec6c034bf99e1974f27cb6a1ad7b3e26ffcfb150c447349661771fd21d54c25602ab01c1b1b43346ce1

  • C:\Users\Admin\AppData\Local\Temp\dtsmsys.exe

    Filesize

    3.4MB

    MD5

    e695b8888af3b57f1a56961bd289463c

    SHA1

    e8c3892fcf4635a16fe91b9542953e2ac5141df2

    SHA256

    c5a45793d7c361f18d36c190b86c951bf0e7a01ad52132c7e9e9d4101eff73aa

    SHA512

    3c1ba39b7819020ad748bfd8bc0cca01fda5e5c7a2111ec6c034bf99e1974f27cb6a1ad7b3e26ffcfb150c447349661771fd21d54c25602ab01c1b1b43346ce1

  • C:\Users\Admin\AppData\Local\hndtbrK.FEror\Files\NewBlock.doc

    Filesize

    4.5MB

    MD5

    cb8d61c9db078b07b563ed57f26f2439

    SHA1

    5e77f4f169de68ed7aa107e9aa8970f775beb5af

    SHA256

    4dd0d19d34971b97a23c3a11f5f5e11b754d53cc2a703f751f0ce399881561c7

    SHA512

    2cb87687bfe02bd1d8370bc72828239d6ae35cb0bcf349f5f4e6134497caba55521048d2114724c7d0df1aa1d5e13daf9f08d923df4ae5b1f1831e8bfb5f3ddb

  • C:\Users\Admin\AppData\Local\hndtbrK.FEror\sysInformation.txt

    Filesize

    808B

    MD5

    9b77eaec3e97c1386511a4f631d7e4f9

    SHA1

    bfc8dff1e378452bed3561e4e4c1d3ef0985f7a8

    SHA256

    d91f87f3540bc6a5ab6ab50eb8b7fce9087a66a33d17daac37651891078a5b0a

    SHA512

    968008a536b71d04e88effb5c9028aa2d9f5adbd500a0ca929efc26368d7308c6cc04f837c9f4895fbb858c5185afdfa09d91171536079ca6480bad00e477b54

  • memory/468-64-0x0000000000CD0000-0x0000000000D82000-memory.dmp

    Filesize

    712KB

  • memory/468-76-0x000000001CD40000-0x000000001D06E000-memory.dmp

    Filesize

    3.2MB

  • memory/468-78-0x000000001AF40000-0x000000001AFB6000-memory.dmp

    Filesize

    472KB

  • memory/468-90-0x000000001AFE0000-0x000000001B060000-memory.dmp

    Filesize

    512KB

  • memory/468-63-0x000000001AFE0000-0x000000001B060000-memory.dmp

    Filesize

    512KB

  • memory/468-62-0x0000000001050000-0x000000000139A000-memory.dmp

    Filesize

    3.3MB

  • memory/828-54-0x0000000000BB0000-0x0000000000BCA000-memory.dmp

    Filesize

    104KB

  • memory/828-57-0x00000000004F0000-0x0000000000570000-memory.dmp

    Filesize

    512KB

  • memory/828-55-0x00000000004F0000-0x0000000000570000-memory.dmp

    Filesize

    512KB