Analysis

  • max time kernel
    66s
  • max time network
    127s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    25-03-2021 21:16

General

  • Target

    ed8a7ffec56f450a365e758012db092883bbd23565f3f.exe

  • Size

    784KB

  • MD5

    1d963f2296c5363f16dff1165cb8e413

  • SHA1

    15f699a8a754a937081a27ab75d4a793b82993e6

  • SHA256

    ed8a7ffec56f450a365e758012db092883bbd23565f3f9fbb004c189fb703de3

  • SHA512

    a76bf1f1398800ee0a09088d42dc38ce2d42b66e24a8cb4c97f1c055702483193467b562740c808106fa813614425304993f16e9a101e1e8202deec4ef65e2be

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\ed8a7ffec56f450a365e758012db092883bbd23565f3f.exe
    "C:\Users\Admin\AppData\Local\Temp\ed8a7ffec56f450a365e758012db092883bbd23565f3f.exe"
    1⤵
    • Adds Run key to start application
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:412
    • C:\Windows\SysWOW64\icacls.exe
      icacls "C:\Users\Admin\AppData\Local\189211a5-3899-4f19-aea8-f304a83bbcd7" /deny *S-1-1-0:(OI)(CI)(DE,DC)
      2⤵
      • Modifies file permissions
      PID:3708
    • C:\Users\Admin\AppData\Local\Temp\ed8a7ffec56f450a365e758012db092883bbd23565f3f.exe
      "C:\Users\Admin\AppData\Local\Temp\ed8a7ffec56f450a365e758012db092883bbd23565f3f.exe" --Admin IsNotAutoStart IsNotTask
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:3608
      • C:\Users\Admin\AppData\Local\2f61fc79-6c97-412e-8d7d-9ad96872610c\updatewin.exe
        "C:\Users\Admin\AppData\Local\2f61fc79-6c97-412e-8d7d-9ad96872610c\updatewin.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of WriteProcessMemory
        PID:1324
        • C:\Windows\SysWOW64\cmd.exe
          /c timeout /t 3 & del /f /q C:\Users\Admin\AppData\Local\2f61fc79-6c97-412e-8d7d-9ad96872610c\updatewin.exe
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:3360
          • C:\Windows\SysWOW64\timeout.exe
            timeout /t 3
            5⤵
            • Delays execution with timeout.exe
            PID:2220
      • C:\Users\Admin\AppData\Local\2f61fc79-6c97-412e-8d7d-9ad96872610c\5.exe
        "C:\Users\Admin\AppData\Local\2f61fc79-6c97-412e-8d7d-9ad96872610c\5.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Checks processor information in registry
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:2136
        • 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\2f61fc79-6c97-412e-8d7d-9ad96872610c\5.exe" & del C:\ProgramData\*.dll & exit
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:200
          • C:\Windows\SysWOW64\taskkill.exe
            taskkill /im 5.exe /f
            5⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:2748
          • C:\Windows\SysWOW64\timeout.exe
            timeout /t 6
            5⤵
            • Delays execution with timeout.exe
            PID:2268

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

    6f9501f45b2159aaf154d33a937ef6e7

    SHA1

    7d36f2e3b2e22637910ccb6116ba329bb2008ba3

    SHA256

    8224875e3a039c7e2a808e232274ae1dd9507f68a537d413eeeb71f45a061364

    SHA512

    96fd8786083af7af18913cc9317c8f79646a5633658e87d743aa5d6a33c991a14fbc75e0a29f4985b31078eeaf6e7412f70416fd3274a084f41e03ee3e6614c7

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

    e644cdbe0fd68a6ece0559497c45bf84

    SHA1

    c809996c27832b39bfcf183ea162f2f7c2436a0f

    SHA256

    082e4c7215addf5bb77a8dbba1bb9fbc2db49c0db4f84124aa3c1d2ad51f8657

    SHA512

    679e8bf80e8a001873f92b3c3d3e09c69f032053fad6afc451108ac1c2d5fad1bfe5b339a5dbcced6daf229d6cba5ae322929998fc51999d96576e424e3e9106

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

    e44701ffb3c15fcacc229d3ab7c7e09b

    SHA1

    939d74e0457d0f65684d9f556fc96cd8203f5383

    SHA256

    cb6800568be911b39d92b43728ab8c9dc6fa97a83a7015fc00ba7ca47d39ff41

    SHA512

    235245352e2c7b5d9753f869b04447198f631b96cb983dad8ade27a1e209f509816ab9078295b08badc8b49b39def9a742f80376a21c6f4b1b17af88e34d235b

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

    c62dfc2eff00bf0674bc66bf4fc328d4

    SHA1

    2abd718c3504900f3e712212a8c2c43af4a58826

    SHA256

    c7e8880ef7ab2879ea9e668caa6c82eb9d3bf78f5a1e1a90fd3bc8d0466b1475

    SHA512

    c3581294a76e6d814b636699b221b2d32f1d72cd681e8b8562d6fb731f69fc155ce40e5a5ef453704daf87d8fada935ea866b512562e7015ce6a7f3f8beeb49c

  • C:\Users\Admin\AppData\Local\189211a5-3899-4f19-aea8-f304a83bbcd7\ed8a7ffec56f450a365e758012db092883bbd23565f3f.exe
    MD5

    1d963f2296c5363f16dff1165cb8e413

    SHA1

    15f699a8a754a937081a27ab75d4a793b82993e6

    SHA256

    ed8a7ffec56f450a365e758012db092883bbd23565f3f9fbb004c189fb703de3

    SHA512

    a76bf1f1398800ee0a09088d42dc38ce2d42b66e24a8cb4c97f1c055702483193467b562740c808106fa813614425304993f16e9a101e1e8202deec4ef65e2be

  • C:\Users\Admin\AppData\Local\2f61fc79-6c97-412e-8d7d-9ad96872610c\5.exe
    MD5

    212b12e2686111514455c97b689c8457

    SHA1

    2c39181e491ccea8f3eb1020b698bfaf57b31c15

    SHA256

    a8fe17654d8f2a952fee93bd6e78864ee4a2e766c92e6ba7dda2b0117e1ef97a

    SHA512

    cec5e902dce2dd4d70eef4ca835efa2704e49c434dd81e2b99100df76b1b095110e11b54ad5d2036d60f5378bf5fd637c5e0d36b7fcd3c0cd9cd77bc34c95346

  • C:\Users\Admin\AppData\Local\2f61fc79-6c97-412e-8d7d-9ad96872610c\5.exe
    MD5

    212b12e2686111514455c97b689c8457

    SHA1

    2c39181e491ccea8f3eb1020b698bfaf57b31c15

    SHA256

    a8fe17654d8f2a952fee93bd6e78864ee4a2e766c92e6ba7dda2b0117e1ef97a

    SHA512

    cec5e902dce2dd4d70eef4ca835efa2704e49c434dd81e2b99100df76b1b095110e11b54ad5d2036d60f5378bf5fd637c5e0d36b7fcd3c0cd9cd77bc34c95346

  • C:\Users\Admin\AppData\Local\2f61fc79-6c97-412e-8d7d-9ad96872610c\updatewin.exe
    MD5

    9010fa92cc83afe00fab38703e6ffa77

    SHA1

    4d603ec27d02d84a65d1555c2df0896d7675fafc

    SHA256

    38e6f4d8f53e8a38950594d9588cb00218bf46113c51b5241771181a521b9c75

    SHA512

    a39ea249da189fedd5f8d1c13d03693626c70ba08c69c4ec76396d3475c5480e98c8dba1da0b74089252d8d781fc050e4eed9346b648ccbb42e22cf6d15399e8

  • C:\Users\Admin\AppData\Local\2f61fc79-6c97-412e-8d7d-9ad96872610c\updatewin.exe
    MD5

    9010fa92cc83afe00fab38703e6ffa77

    SHA1

    4d603ec27d02d84a65d1555c2df0896d7675fafc

    SHA256

    38e6f4d8f53e8a38950594d9588cb00218bf46113c51b5241771181a521b9c75

    SHA512

    a39ea249da189fedd5f8d1c13d03693626c70ba08c69c4ec76396d3475c5480e98c8dba1da0b74089252d8d781fc050e4eed9346b648ccbb42e22cf6d15399e8

  • \ProgramData\mozglue.dll
    MD5

    8f73c08a9660691143661bf7332c3c27

    SHA1

    37fa65dd737c50fda710fdbde89e51374d0c204a

    SHA256

    3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

    SHA512

    0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

  • \ProgramData\nss3.dll
    MD5

    bfac4e3c5908856ba17d41edcd455a51

    SHA1

    8eec7e888767aa9e4cca8ff246eb2aacb9170428

    SHA256

    e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

    SHA512

    2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

  • memory/200-28-0x0000000000000000-mapping.dmp
  • memory/412-4-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/412-3-0x0000000000CC0000-0x0000000000DDA000-memory.dmp
    Filesize

    1.1MB

  • memory/412-2-0x0000000000CC0000-0x0000000000CC1000-memory.dmp
    Filesize

    4KB

  • memory/1324-15-0x0000000000000000-mapping.dmp
  • memory/2136-18-0x0000000000000000-mapping.dmp
  • memory/2136-21-0x00000000031F0000-0x00000000031F1000-memory.dmp
    Filesize

    4KB

  • memory/2136-22-0x0000000003080000-0x0000000003116000-memory.dmp
    Filesize

    600KB

  • memory/2136-23-0x0000000000400000-0x0000000000499000-memory.dmp
    Filesize

    612KB

  • memory/2220-27-0x0000000000000000-mapping.dmp
  • memory/2268-30-0x0000000000000000-mapping.dmp
  • memory/2748-29-0x0000000000000000-mapping.dmp
  • memory/3360-26-0x0000000000000000-mapping.dmp
  • memory/3608-14-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/3608-8-0x0000000000C30000-0x0000000000C31000-memory.dmp
    Filesize

    4KB

  • memory/3608-7-0x0000000000000000-mapping.dmp
  • memory/3708-5-0x0000000000000000-mapping.dmp