Analysis

  • max time kernel
    67s
  • max time network
    124s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    27-07-2021 17:02

General

  • Target

    4b6522196a10a5443f10c5dcbdf09fd73cbce8a85213f369dfaa9774c4c27968.exe

  • Size

    832KB

  • MD5

    97c7bb48650b39accc0f3efa5f742194

  • SHA1

    17de166d077405f0e68d17a44e128ce0c12b503b

  • SHA256

    4b6522196a10a5443f10c5dcbdf09fd73cbce8a85213f369dfaa9774c4c27968

  • SHA512

    7a4223a4e010527c9b4ca21fad7b570d52193d79a8369aba0885823252854745013c769c26d904c3f9a7f69b0ef2453b66401488cd8a897ad9a29d595da9b6f7

Malware Config

Extracted

Family

vidar

Version

39.7

Botnet

517

C2

https://shpak125.tumblr.com/

Attributes
  • profile_id

    517

Signatures

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • suricata: ET MALWARE Potential Dridex.Maldoc Minimal Executable Request
  • suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)
  • suricata: ET MALWARE Vidar/Arkei Stealer Client Data Upload
  • suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil
  • Vidar Stealer 4 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 2 IoCs
  • Modifies file permissions 1 TTPs 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Accesses 2FA software files, possible credential harvesting 2 TTPs
  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Looks up external IP address via web service 3 IoCs

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

  • Suspicious use of SetThreadContext 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Delays execution with timeout.exe 1 IoCs
  • Kills process with taskkill 1 IoCs
  • Modifies system certificate store 2 TTPs 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 12 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 46 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\4b6522196a10a5443f10c5dcbdf09fd73cbce8a85213f369dfaa9774c4c27968.exe
    "C:\Users\Admin\AppData\Local\Temp\4b6522196a10a5443f10c5dcbdf09fd73cbce8a85213f369dfaa9774c4c27968.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:672
    • C:\Users\Admin\AppData\Local\Temp\4b6522196a10a5443f10c5dcbdf09fd73cbce8a85213f369dfaa9774c4c27968.exe
      "C:\Users\Admin\AppData\Local\Temp\4b6522196a10a5443f10c5dcbdf09fd73cbce8a85213f369dfaa9774c4c27968.exe"
      2⤵
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:3912
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\f94aef05-a658-4564-a9fa-0d23e03bf343" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:3316
      • C:\Users\Admin\AppData\Local\Temp\4b6522196a10a5443f10c5dcbdf09fd73cbce8a85213f369dfaa9774c4c27968.exe
        "C:\Users\Admin\AppData\Local\Temp\4b6522196a10a5443f10c5dcbdf09fd73cbce8a85213f369dfaa9774c4c27968.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:776
        • C:\Users\Admin\AppData\Local\Temp\4b6522196a10a5443f10c5dcbdf09fd73cbce8a85213f369dfaa9774c4c27968.exe
          "C:\Users\Admin\AppData\Local\Temp\4b6522196a10a5443f10c5dcbdf09fd73cbce8a85213f369dfaa9774c4c27968.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:2124
          • C:\Users\Admin\AppData\Local\ad6208dd-3bc0-4a5f-ba63-b4d07beaa83b\build2.exe
            "C:\Users\Admin\AppData\Local\ad6208dd-3bc0-4a5f-ba63-b4d07beaa83b\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:3196
            • C:\Users\Admin\AppData\Local\ad6208dd-3bc0-4a5f-ba63-b4d07beaa83b\build2.exe
              "C:\Users\Admin\AppData\Local\ad6208dd-3bc0-4a5f-ba63-b4d07beaa83b\build2.exe"
              6⤵
              • Executes dropped EXE
              • Loads dropped DLL
              • Checks processor information in registry
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of WriteProcessMemory
              PID:3356
              • C:\Windows\SysWOW64\cmd.exe
                "C:\Windows\System32\cmd.exe" /c taskkill /im build2.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\ad6208dd-3bc0-4a5f-ba63-b4d07beaa83b\build2.exe" & del C:\ProgramData\*.dll & exit
                7⤵
                • Suspicious use of WriteProcessMemory
                PID:188
                • C:\Windows\SysWOW64\taskkill.exe
                  taskkill /im build2.exe /f
                  8⤵
                  • Kills process with taskkill
                  • Suspicious use of AdjustPrivilegeToken
                  PID:940
                • C:\Windows\SysWOW64\timeout.exe
                  timeout /t 6
                  8⤵
                  • Delays execution with timeout.exe
                  PID:3960

Network

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

File Permissions Modification

1
T1222

Modify Registry

2
T1112

Install Root Certificate

1
T1130

Credential Access

Credentials in Files

3
T1081

Discovery

Query Registry

2
T1012

System Information Discovery

2
T1082

Collection

Data from Local System

3
T1005

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\ProgramData\freebl3.dll
    MD5

    ef2834ac4ee7d6724f255beaf527e635

    SHA1

    5be8c1e73a21b49f353c2ecfa4108e43a883cb7b

    SHA256

    a770ecba3b08bbabd0a567fc978e50615f8b346709f8eb3cfacf3faab24090ba

    SHA512

    c6ea0e4347cbd7ef5e80ae8c0afdca20ea23ac2bdd963361dfaf562a9aed58dcbc43f89dd826692a064d76c3f4b3e92361af7b79a6d16a75d9951591ae3544d2

  • C:\ProgramData\mozglue.dll
    MD5

    8f73c08a9660691143661bf7332c3c27

    SHA1

    37fa65dd737c50fda710fdbde89e51374d0c204a

    SHA256

    3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

    SHA512

    0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

  • C:\ProgramData\msvcp140.dll
    MD5

    109f0f02fd37c84bfc7508d4227d7ed5

    SHA1

    ef7420141bb15ac334d3964082361a460bfdb975

    SHA256

    334e69ac9367f708ce601a6f490ff227d6c20636da5222f148b25831d22e13d4

    SHA512

    46eb62b65817365c249b48863d894b4669e20fcb3992e747cd5c9fdd57968e1b2cf7418d1c9340a89865eadda362b8db51947eb4427412eb83b35994f932fd39

  • C:\ProgramData\nss3.dll
    MD5

    bfac4e3c5908856ba17d41edcd455a51

    SHA1

    8eec7e888767aa9e4cca8ff246eb2aacb9170428

    SHA256

    e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

    SHA512

    2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

  • C:\ProgramData\softokn3.dll
    MD5

    a2ee53de9167bf0d6c019303b7ca84e5

    SHA1

    2a3c737fa1157e8483815e98b666408a18c0db42

    SHA256

    43536adef2ddcc811c28d35fa6ce3031029a2424ad393989db36169ff2995083

    SHA512

    45b56432244f86321fa88fbcca6a0d2a2f7f4e0648c1d7d7b1866adc9daa5eddd9f6bb73662149f279c9ab60930dad1113c8337cb5e6ec9eed5048322f65f7d8

  • C:\ProgramData\vcruntime140.dll
    MD5

    7587bf9cb4147022cd5681b015183046

    SHA1

    f2106306a8f6f0da5afb7fc765cfa0757ad5a628

    SHA256

    c40bb03199a2054dabfc7a8e01d6098e91de7193619effbd0f142a7bf031c14d

    SHA512

    0b63e4979846ceba1b1ed8470432ea6aa18cca66b5f5322d17b14bc0dfa4b2ee09ca300a016e16a01db5123e4e022820698f46d9bad1078bd24675b4b181e91f

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
    MD5

    ed841d4c457ead52231fd3a2ccf235eb

    SHA1

    3c3e63ebce85e0ad02116131fa358f15bd685aaa

    SHA256

    1b71a0b2da18c33c8067989139712715013e134c0df6fd9d9a99944d665a182d

    SHA512

    da144b6500c3fa6e3becb02b9507424e28b4514c410ccc65c2bf2fde457076edef5de8130832d06e3d985bbbdb7ac132df8bf6aced68d9c5fc1ca27868f3fcc1

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
    MD5

    9be84148228d38d8a7aa04aa003ae49a

    SHA1

    83e6cafe58a6ad820ef295825f0d403e55710aae

    SHA256

    eae2eb93230894f646f45cec38cc20b03f5075e8b5b6c6639dc487c35e7ad573

    SHA512

    eb85383b426ec5cd211fafceaf24d438c8a0d6ac43be2cf9802748de505ada0b4d008548a08834dcc86b4c1b0e3fa5c1a4762e54ab5f6e55ea900e535bc4b578

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
    MD5

    4f7b85557957ed2e63a599cce4ff79aa

    SHA1

    d446b72bc0f35930fd66bcc394f686a8aec7c81b

    SHA256

    e7df777b047d5266512b2b221a5231c55fd282683493b049fcd3b569b5db83ee

    SHA512

    b2e68893a51ad90749df8bb3503c7c7335c0c95c69067a5f9518dfb81dae22e7b127becfe413234d637ac8798aa42b063ea1b83afb63f190a61a7c6f6c08b9ae

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
    MD5

    bd2b4a94671820747d0379e7c1b43b5b

    SHA1

    3b4e9a6eed9db4856b660dff5a296feae1119260

    SHA256

    4f1bededf8a5354031c16c14892c1d8793e2addfffbe494f66925abc30e770b9

    SHA512

    a834a5778da1977cc44e06415d5f998d97c2e206a553aebfa2975476f13f10b70272590802f14f42061f1a790ace4f00c979213c0f6520b540c8f3bc678922e7

  • C:\Users\Admin\AppData\Local\ad6208dd-3bc0-4a5f-ba63-b4d07beaa83b\build2.exe
    MD5

    bb494dd99be260d8eeb1980ce2a96d4c

    SHA1

    ac28b998e53f55c106f624025480ab9a51a00539

    SHA256

    910c0e730a147927a0b840ac1d5501c0046d6c568da8adced6ce9d95171bf886

    SHA512

    b135732538c19d17aca4ec51fea19d1200ae387e2fccdb91876e9890ac28de58bde4bba8d5801532a76015eda3d08bcc9f65398c4c5e63537e96d916ce7c7030

  • C:\Users\Admin\AppData\Local\ad6208dd-3bc0-4a5f-ba63-b4d07beaa83b\build2.exe
    MD5

    bb494dd99be260d8eeb1980ce2a96d4c

    SHA1

    ac28b998e53f55c106f624025480ab9a51a00539

    SHA256

    910c0e730a147927a0b840ac1d5501c0046d6c568da8adced6ce9d95171bf886

    SHA512

    b135732538c19d17aca4ec51fea19d1200ae387e2fccdb91876e9890ac28de58bde4bba8d5801532a76015eda3d08bcc9f65398c4c5e63537e96d916ce7c7030

  • C:\Users\Admin\AppData\Local\ad6208dd-3bc0-4a5f-ba63-b4d07beaa83b\build2.exe
    MD5

    bb494dd99be260d8eeb1980ce2a96d4c

    SHA1

    ac28b998e53f55c106f624025480ab9a51a00539

    SHA256

    910c0e730a147927a0b840ac1d5501c0046d6c568da8adced6ce9d95171bf886

    SHA512

    b135732538c19d17aca4ec51fea19d1200ae387e2fccdb91876e9890ac28de58bde4bba8d5801532a76015eda3d08bcc9f65398c4c5e63537e96d916ce7c7030

  • C:\Users\Admin\AppData\Local\f94aef05-a658-4564-a9fa-0d23e03bf343\4b6522196a10a5443f10c5dcbdf09fd73cbce8a85213f369dfaa9774c4c27968.exe
    MD5

    97c7bb48650b39accc0f3efa5f742194

    SHA1

    17de166d077405f0e68d17a44e128ce0c12b503b

    SHA256

    4b6522196a10a5443f10c5dcbdf09fd73cbce8a85213f369dfaa9774c4c27968

    SHA512

    7a4223a4e010527c9b4ca21fad7b570d52193d79a8369aba0885823252854745013c769c26d904c3f9a7f69b0ef2453b66401488cd8a897ad9a29d595da9b6f7

  • \ProgramData\mozglue.dll
    MD5

    8f73c08a9660691143661bf7332c3c27

    SHA1

    37fa65dd737c50fda710fdbde89e51374d0c204a

    SHA256

    3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

    SHA512

    0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

  • \ProgramData\nss3.dll
    MD5

    bfac4e3c5908856ba17d41edcd455a51

    SHA1

    8eec7e888767aa9e4cca8ff246eb2aacb9170428

    SHA256

    e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

    SHA512

    2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

  • memory/188-138-0x0000000000000000-mapping.dmp
  • memory/672-116-0x00000000022D0000-0x00000000023EB000-memory.dmp
    Filesize

    1.1MB

  • memory/776-120-0x0000000000000000-mapping.dmp
  • memory/940-139-0x0000000000000000-mapping.dmp
  • memory/2124-127-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/2124-122-0x0000000000424141-mapping.dmp
  • memory/3196-134-0x0000000002110000-0x00000000021AE000-memory.dmp
    Filesize

    632KB

  • memory/3196-128-0x0000000000000000-mapping.dmp
  • memory/3316-118-0x0000000000000000-mapping.dmp
  • memory/3356-135-0x0000000000400000-0x00000000004A1000-memory.dmp
    Filesize

    644KB

  • memory/3356-132-0x000000000046B76D-mapping.dmp
  • memory/3356-131-0x0000000000400000-0x00000000004A1000-memory.dmp
    Filesize

    644KB

  • memory/3912-114-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/3912-117-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/3912-115-0x0000000000424141-mapping.dmp
  • memory/3960-140-0x0000000000000000-mapping.dmp