f3499257cbdf648dcc3c1a25bbf5d61d.exe

General
Target

f3499257cbdf648dcc3c1a25bbf5d61d.exe

Filesize

663KB

Completed

02-09-2021 13:23

Score
10 /10
MD5

f3499257cbdf648dcc3c1a25bbf5d61d

SHA1

5cd11a0ff628ec90334976be4d188299f171360b

SHA256

e3772dff75f0c54d488300728db28432abacffff7485f8da1b05a3f7cf0bc0ae

Malware Config

Extracted

Family vidar
Version 40.3
Botnet 1008
C2

https://lenko349.tumblr.com/

Attributes
profile_id
1008
Signatures 19

Filter: none

Collection
Credential Access
Defense Evasion
Discovery
  • Vidar

    Description

    Vidar is an infostealer based on Arkei stealer.

  • suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)

    Description

    suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)

    Tags

  • suricata: ET MALWARE Vidar/Arkei Stealer Client Data Upload

    Description

    suricata: ET MALWARE Vidar/Arkei Stealer Client Data Upload

    Tags

  • suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil

    Description

    suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil

    Tags

  • Vidar Stealer

    Tags

    Reported IOCs

    resourceyara_rule
    behavioral2/memory/3976-115-0x0000000004910000-0x00000000049E3000-memory.dmpfamily_vidar
    behavioral2/memory/3976-116-0x0000000000400000-0x0000000002BB1000-memory.dmpfamily_vidar
  • Downloads MZ/PE file
  • Loads dropped DLL
    f3499257cbdf648dcc3c1a25bbf5d61d.exe

    Reported IOCs

    pidprocess
    3976f3499257cbdf648dcc3c1a25bbf5d61d.exe
    3976f3499257cbdf648dcc3c1a25bbf5d61d.exe
  • Reads user/profile data of web browsers

    Description

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

    TTPs

    Data from Local SystemCredentials in Files
  • Accesses 2FA software files, possible credential harvesting

    TTPs

    Data from Local SystemCredentials in Files
  • Accesses cryptocurrency files/wallets, possible credential harvesting

    Tags

    TTPs

    Data from Local SystemCredentials in Files
  • Checks installed software on the system

    Description

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

    Tags

    TTPs

    Query Registry
  • Enumerates physical storage devices

    Description

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

    TTPs

    System Information Discovery
  • Checks processor information in registry
    f3499257cbdf648dcc3c1a25bbf5d61d.exe

    Description

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

    TTPs

    Query RegistrySystem Information Discovery

    Reported IOCs

    descriptioniocprocess
    Key opened\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0f3499257cbdf648dcc3c1a25bbf5d61d.exe
    Key value queried\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameStringf3499257cbdf648dcc3c1a25bbf5d61d.exe
  • Delays execution with timeout.exe
    timeout.exe

    Tags

    Reported IOCs

    pidprocess
    2728timeout.exe
  • Kills process with taskkill
    taskkill.exe

    Tags

    Reported IOCs

    pidprocess
    368taskkill.exe
  • Modifies system certificate store
    f3499257cbdf648dcc3c1a25bbf5d61d.exe

    TTPs

    Install Root CertificateModify Registry

    Reported IOCs

    descriptioniocprocess
    Key created\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349f3499257cbdf648dcc3c1a25bbf5d61d.exe
    Set value (data)\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349\Blob = 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.exe
  • Suspicious behavior: EnumeratesProcesses
    f3499257cbdf648dcc3c1a25bbf5d61d.exe

    Reported IOCs

    pidprocess
    3976f3499257cbdf648dcc3c1a25bbf5d61d.exe
    3976f3499257cbdf648dcc3c1a25bbf5d61d.exe
    3976f3499257cbdf648dcc3c1a25bbf5d61d.exe
    3976f3499257cbdf648dcc3c1a25bbf5d61d.exe
    3976f3499257cbdf648dcc3c1a25bbf5d61d.exe
    3976f3499257cbdf648dcc3c1a25bbf5d61d.exe
    3976f3499257cbdf648dcc3c1a25bbf5d61d.exe
    3976f3499257cbdf648dcc3c1a25bbf5d61d.exe
  • Suspicious use of AdjustPrivilegeToken
    taskkill.exe

    Reported IOCs

    descriptionpidprocess
    Token: SeDebugPrivilege368taskkill.exe
  • Suspicious use of WriteProcessMemory
    f3499257cbdf648dcc3c1a25bbf5d61d.execmd.exe

    Reported IOCs

    descriptionpidprocesstarget process
    PID 3976 wrote to memory of 38603976f3499257cbdf648dcc3c1a25bbf5d61d.execmd.exe
    PID 3976 wrote to memory of 38603976f3499257cbdf648dcc3c1a25bbf5d61d.execmd.exe
    PID 3976 wrote to memory of 38603976f3499257cbdf648dcc3c1a25bbf5d61d.execmd.exe
    PID 3860 wrote to memory of 3683860cmd.exetaskkill.exe
    PID 3860 wrote to memory of 3683860cmd.exetaskkill.exe
    PID 3860 wrote to memory of 3683860cmd.exetaskkill.exe
    PID 3860 wrote to memory of 27283860cmd.exetimeout.exe
    PID 3860 wrote to memory of 27283860cmd.exetimeout.exe
    PID 3860 wrote to memory of 27283860cmd.exetimeout.exe
Processes 4
  • C:\Users\Admin\AppData\Local\Temp\f3499257cbdf648dcc3c1a25bbf5d61d.exe
    "C:\Users\Admin\AppData\Local\Temp\f3499257cbdf648dcc3c1a25bbf5d61d.exe"
    Loads dropped DLL
    Checks processor information in registry
    Modifies system certificate store
    Suspicious behavior: EnumeratesProcesses
    Suspicious use of WriteProcessMemory
    PID:3976
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im f3499257cbdf648dcc3c1a25bbf5d61d.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\Temp\f3499257cbdf648dcc3c1a25bbf5d61d.exe" & del C:\ProgramData\*.dll & exit
      Suspicious use of WriteProcessMemory
      PID:3860
      • C:\Windows\SysWOW64\taskkill.exe
        taskkill /im f3499257cbdf648dcc3c1a25bbf5d61d.exe /f
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        PID:368
      • C:\Windows\SysWOW64\timeout.exe
        timeout /t 6
        Delays execution with timeout.exe
        PID:2728
Network
MITRE ATT&CK Matrix
Command and Control
    Credential Access
    Execution
      Exfiltration
        Impact
          Initial Access
            Lateral Movement
              Persistence
                Privilege Escalation
                  Replay Monitor
                  00:00 00:00
                  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

                  • \ProgramData\mozglue.dll

                    MD5

                    8f73c08a9660691143661bf7332c3c27

                    SHA1

                    37fa65dd737c50fda710fdbde89e51374d0c204a

                    SHA256

                    3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

                    SHA512

                    0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

                  • \ProgramData\nss3.dll

                    MD5

                    bfac4e3c5908856ba17d41edcd455a51

                    SHA1

                    8eec7e888767aa9e4cca8ff246eb2aacb9170428

                    SHA256

                    e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

                    SHA512

                    2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

                  • memory/368-120-0x0000000000000000-mapping.dmp

                  • memory/2728-121-0x0000000000000000-mapping.dmp

                  • memory/3860-119-0x0000000000000000-mapping.dmp

                  • memory/3976-116-0x0000000000400000-0x0000000002BB1000-memory.dmp

                  • memory/3976-115-0x0000000004910000-0x00000000049E3000-memory.dmp