Analysis

  • max time kernel
    67s
  • max time network
    149s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    27-03-2021 19:56

General

  • Target

    c42634f75c9b327a17684b55e162ec9a.exe

  • Size

    713KB

  • MD5

    c42634f75c9b327a17684b55e162ec9a

  • SHA1

    c21f18b46532fa32d45b671b7e804404cff23976

  • SHA256

    2ae59af40109d186eb8999211e8ad933d2fffec609a2bdbd87a8aa4e9654a111

  • SHA512

    7590c1a35add4ad87b3e73a2140efecdbf405c6fb0888d23b9e5288786c037dc458ac53c1ce9b91146807393ea64c2084d56b38e797c9b19fd63b772f45d4f08

Malware Config

Signatures

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 2 IoCs
  • Modifies file permissions 1 TTPs 1 IoCs
  • Reads local data of messenger clients 2 TTPs

    Infostealers often target stored data of messaging applications, which can include saved credentials and account information.

  • 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.

  • 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 2 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 27 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\c42634f75c9b327a17684b55e162ec9a.exe
    "C:\Users\Admin\AppData\Local\Temp\c42634f75c9b327a17684b55e162ec9a.exe"
    1⤵
    • Adds Run key to start application
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1812
    • C:\Windows\SysWOW64\icacls.exe
      icacls "C:\Users\Admin\AppData\Local\baf1142e-08cb-4f7c-ad97-a92b7ec4b356" /deny *S-1-1-0:(OI)(CI)(DE,DC)
      2⤵
      • Modifies file permissions
      PID:748
    • C:\Users\Admin\AppData\Local\Temp\c42634f75c9b327a17684b55e162ec9a.exe
      "C:\Users\Admin\AppData\Local\Temp\c42634f75c9b327a17684b55e162ec9a.exe" --Admin IsNotAutoStart IsNotTask
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2760
      • C:\Users\Admin\AppData\Local\25a7f2a4-1bfd-49ec-a7fc-1e59bcf0101b\updatewin.exe
        "C:\Users\Admin\AppData\Local\25a7f2a4-1bfd-49ec-a7fc-1e59bcf0101b\updatewin.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of WriteProcessMemory
        PID:2108
        • C:\Windows\SysWOW64\cmd.exe
          /c timeout /t 3 & del /f /q C:\Users\Admin\AppData\Local\25a7f2a4-1bfd-49ec-a7fc-1e59bcf0101b\updatewin.exe
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1780
          • C:\Windows\SysWOW64\timeout.exe
            timeout /t 3
            5⤵
            • Delays execution with timeout.exe
            PID:2232
      • C:\Users\Admin\AppData\Local\25a7f2a4-1bfd-49ec-a7fc-1e59bcf0101b\5.exe
        "C:\Users\Admin\AppData\Local\25a7f2a4-1bfd-49ec-a7fc-1e59bcf0101b\5.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Checks processor information in registry
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:1148
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c taskkill /im 5.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\25a7f2a4-1bfd-49ec-a7fc-1e59bcf0101b\5.exe" & del C:\ProgramData\*.dll & exit
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:2400
          • C:\Windows\SysWOW64\taskkill.exe
            taskkill /im 5.exe /f
            5⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:2484
          • C:\Windows\SysWOW64\timeout.exe
            timeout /t 6
            5⤵
            • Delays execution with timeout.exe
            PID:2980

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

4
T1081

Discovery

Query Registry

2
T1012

System Information Discovery

2
T1082

Collection

Data from Local System

4
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

    f73d46ba9c9045633cac5ebf1442b931

    SHA1

    f1e81e9eaf322ffb8a25fc428231e486fa1028fe

    SHA256

    baddcff6da313cce5bd9590c7de0ef99f69e7d64840e2af33353b866d772bc91

    SHA512

    ed3bf10ecde1162ccce8f243c65f24b621184ef52efd6288a95fd9ff889c0d2407af127305f3f1c12d6bd591966f811cbee32bc2e3fe7d9e607e81dd987e6462

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

    7d98a1a29082095fcf0be14aded739bf

    SHA1

    d2ef5678db6ab6573ec7275aae4af9ab3d8ddd3c

    SHA256

    2f6cb738db05f4049507fcf434120dfcbb9d84cdd0494ff9008941977659b100

    SHA512

    d2da9c1531595074825665d74acd90f04a3b0cc69827ad988408490beb739588a2b92a0926a4fcd975c8787406153b89444d54fc13f354040867804aeb454a1f

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

    f94e1b85921189746fda9528207a307b

    SHA1

    f1a55f4b19de5e02d1dfd1ac87bde4cb1e6c2e68

    SHA256

    581f4f946a0db52fc66fdb9f5288d81e058da174fd8d2ad19bfd68faf5211f46

    SHA512

    28e3c412eca0cef4ca7cd4f06b7254c580b0448f9a3fbe5bb82d383c2ee8b6c1918d00909b618db0d150b40cbf4f77bd38165f162fa1761f330089188122e139

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

    f8feea9d02c0d15532147e107366e3e2

    SHA1

    02851a17f5bf9f5406932611355c8006be4136f0

    SHA256

    f6e535bb6dbfc3421824e47f085b2fafdb8ffac3f79f0e69513bd591c6a9675d

    SHA512

    d396a599c1c9317bdf9c985a9a6e252ba871176709517be5da98fe74e14487714a6fd90e986aa156cecb91b66536498fd06cedba58f9ff91ba2fadbfca3325c0

  • C:\Users\Admin\AppData\Local\25a7f2a4-1bfd-49ec-a7fc-1e59bcf0101b\5.exe
    MD5

    212b12e2686111514455c97b689c8457

    SHA1

    2c39181e491ccea8f3eb1020b698bfaf57b31c15

    SHA256

    a8fe17654d8f2a952fee93bd6e78864ee4a2e766c92e6ba7dda2b0117e1ef97a

    SHA512

    cec5e902dce2dd4d70eef4ca835efa2704e49c434dd81e2b99100df76b1b095110e11b54ad5d2036d60f5378bf5fd637c5e0d36b7fcd3c0cd9cd77bc34c95346

  • C:\Users\Admin\AppData\Local\25a7f2a4-1bfd-49ec-a7fc-1e59bcf0101b\5.exe
    MD5

    212b12e2686111514455c97b689c8457

    SHA1

    2c39181e491ccea8f3eb1020b698bfaf57b31c15

    SHA256

    a8fe17654d8f2a952fee93bd6e78864ee4a2e766c92e6ba7dda2b0117e1ef97a

    SHA512

    cec5e902dce2dd4d70eef4ca835efa2704e49c434dd81e2b99100df76b1b095110e11b54ad5d2036d60f5378bf5fd637c5e0d36b7fcd3c0cd9cd77bc34c95346

  • C:\Users\Admin\AppData\Local\25a7f2a4-1bfd-49ec-a7fc-1e59bcf0101b\updatewin.exe
    MD5

    9010fa92cc83afe00fab38703e6ffa77

    SHA1

    4d603ec27d02d84a65d1555c2df0896d7675fafc

    SHA256

    38e6f4d8f53e8a38950594d9588cb00218bf46113c51b5241771181a521b9c75

    SHA512

    a39ea249da189fedd5f8d1c13d03693626c70ba08c69c4ec76396d3475c5480e98c8dba1da0b74089252d8d781fc050e4eed9346b648ccbb42e22cf6d15399e8

  • C:\Users\Admin\AppData\Local\25a7f2a4-1bfd-49ec-a7fc-1e59bcf0101b\updatewin.exe
    MD5

    9010fa92cc83afe00fab38703e6ffa77

    SHA1

    4d603ec27d02d84a65d1555c2df0896d7675fafc

    SHA256

    38e6f4d8f53e8a38950594d9588cb00218bf46113c51b5241771181a521b9c75

    SHA512

    a39ea249da189fedd5f8d1c13d03693626c70ba08c69c4ec76396d3475c5480e98c8dba1da0b74089252d8d781fc050e4eed9346b648ccbb42e22cf6d15399e8

  • C:\Users\Admin\AppData\Local\baf1142e-08cb-4f7c-ad97-a92b7ec4b356\c42634f75c9b327a17684b55e162ec9a.exe
    MD5

    c42634f75c9b327a17684b55e162ec9a

    SHA1

    c21f18b46532fa32d45b671b7e804404cff23976

    SHA256

    2ae59af40109d186eb8999211e8ad933d2fffec609a2bdbd87a8aa4e9654a111

    SHA512

    7590c1a35add4ad87b3e73a2140efecdbf405c6fb0888d23b9e5288786c037dc458ac53c1ce9b91146807393ea64c2084d56b38e797c9b19fd63b772f45d4f08

  • \ProgramData\mozglue.dll
    MD5

    8f73c08a9660691143661bf7332c3c27

    SHA1

    37fa65dd737c50fda710fdbde89e51374d0c204a

    SHA256

    3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

    SHA512

    0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

  • \ProgramData\nss3.dll
    MD5

    bfac4e3c5908856ba17d41edcd455a51

    SHA1

    8eec7e888767aa9e4cca8ff246eb2aacb9170428

    SHA256

    e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

    SHA512

    2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

  • memory/748-6-0x0000000000000000-mapping.dmp
  • memory/1148-19-0x0000000000000000-mapping.dmp
  • memory/1148-22-0x00000000031C0000-0x00000000031C1000-memory.dmp
    Filesize

    4KB

  • memory/1148-23-0x00000000031C0000-0x0000000003256000-memory.dmp
    Filesize

    600KB

  • memory/1148-24-0x0000000000400000-0x0000000000499000-memory.dmp
    Filesize

    612KB

  • memory/1780-27-0x0000000000000000-mapping.dmp
  • memory/1812-2-0x0000000002830000-0x0000000002831000-memory.dmp
    Filesize

    4KB

  • memory/1812-5-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/1812-3-0x00000000026D0000-0x00000000027EA000-memory.dmp
    Filesize

    1.1MB

  • memory/2108-16-0x0000000000000000-mapping.dmp
  • memory/2232-28-0x0000000000000000-mapping.dmp
  • memory/2400-29-0x0000000000000000-mapping.dmp
  • memory/2484-30-0x0000000000000000-mapping.dmp
  • memory/2760-9-0x0000000002640000-0x0000000002641000-memory.dmp
    Filesize

    4KB

  • memory/2760-8-0x0000000000000000-mapping.dmp
  • memory/2760-15-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/2980-31-0x0000000000000000-mapping.dmp