IMG052361778.exe

General
Target

IMG052361778.exe

Filesize

691KB

Completed

06-05-2021 08:04

Score
10 /10
MD5

74a962db45d6ab6c859ff627987bf1f6

SHA1

893b19a862fca02a5ec9ab0cd270a4970849ecb1

SHA256

c210434fcb39927f4a0d0a844a1a883f8274bc3b9e6d3e6e883f8072f316ca6a

Malware Config

Extracted

Family oski
C2

193.142.59.33

Signatures 14

Filter: none

Collection
Credential Access
Discovery
  • Oski

    Description

    Oski is an infostealer targeting browser data, crypto wallets.

  • Downloads MZ/PE file
  • Deletes itself
    cmd.exe

    Reported IOCs

    pidprocess
    1324cmd.exe
  • Loads dropped DLL
    IMG052361778.exe

    Reported IOCs

    pidprocess
    1564IMG052361778.exe
    1564IMG052361778.exe
    1564IMG052361778.exe
    1564IMG052361778.exe
    1564IMG052361778.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 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
  • Suspicious use of SetThreadContext
    IMG052361778.exe

    Reported IOCs

    descriptionpidprocesstarget process
    PID 1684 set thread context of 15641684IMG052361778.exeIMG052361778.exe
  • 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
    IMG052361778.exe

    Description

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

    TTPs

    Query RegistrySystem Information Discovery

    Reported IOCs

    descriptioniocprocess
    Key value queried\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameStringIMG052361778.exe
  • Kills process with taskkill
    taskkill.exe

    Tags

    Reported IOCs

    pidprocess
    1860taskkill.exe
  • Suspicious behavior: EnumeratesProcesses
    IMG052361778.exepowershell.exe

    Reported IOCs

    pidprocess
    1684IMG052361778.exe
    1684IMG052361778.exe
    668powershell.exe
    668powershell.exe
  • Suspicious use of AdjustPrivilegeToken
    IMG052361778.exepowershell.exetaskkill.exe

    Reported IOCs

    descriptionpidprocess
    Token: SeDebugPrivilege1684IMG052361778.exe
    Token: SeDebugPrivilege668powershell.exe
    Token: SeDebugPrivilege1860taskkill.exe
  • Suspicious use of WriteProcessMemory
    IMG052361778.exeWScript.exeIMG052361778.execmd.exe

    Reported IOCs

    descriptionpidprocesstarget process
    PID 1684 wrote to memory of 15121684IMG052361778.exeWScript.exe
    PID 1684 wrote to memory of 15121684IMG052361778.exeWScript.exe
    PID 1684 wrote to memory of 15121684IMG052361778.exeWScript.exe
    PID 1684 wrote to memory of 15121684IMG052361778.exeWScript.exe
    PID 1684 wrote to memory of 15641684IMG052361778.exeIMG052361778.exe
    PID 1684 wrote to memory of 15641684IMG052361778.exeIMG052361778.exe
    PID 1684 wrote to memory of 15641684IMG052361778.exeIMG052361778.exe
    PID 1684 wrote to memory of 15641684IMG052361778.exeIMG052361778.exe
    PID 1684 wrote to memory of 15641684IMG052361778.exeIMG052361778.exe
    PID 1684 wrote to memory of 15641684IMG052361778.exeIMG052361778.exe
    PID 1684 wrote to memory of 15641684IMG052361778.exeIMG052361778.exe
    PID 1684 wrote to memory of 15641684IMG052361778.exeIMG052361778.exe
    PID 1684 wrote to memory of 15641684IMG052361778.exeIMG052361778.exe
    PID 1684 wrote to memory of 15641684IMG052361778.exeIMG052361778.exe
    PID 1512 wrote to memory of 6681512WScript.exepowershell.exe
    PID 1512 wrote to memory of 6681512WScript.exepowershell.exe
    PID 1512 wrote to memory of 6681512WScript.exepowershell.exe
    PID 1512 wrote to memory of 6681512WScript.exepowershell.exe
    PID 1564 wrote to memory of 13241564IMG052361778.execmd.exe
    PID 1564 wrote to memory of 13241564IMG052361778.execmd.exe
    PID 1564 wrote to memory of 13241564IMG052361778.execmd.exe
    PID 1564 wrote to memory of 13241564IMG052361778.execmd.exe
    PID 1324 wrote to memory of 18601324cmd.exetaskkill.exe
    PID 1324 wrote to memory of 18601324cmd.exetaskkill.exe
    PID 1324 wrote to memory of 18601324cmd.exetaskkill.exe
    PID 1324 wrote to memory of 18601324cmd.exetaskkill.exe
Processes 6
  • C:\Users\Admin\AppData\Local\Temp\IMG052361778.exe
    "C:\Users\Admin\AppData\Local\Temp\IMG052361778.exe"
    Suspicious use of SetThreadContext
    Suspicious behavior: EnumeratesProcesses
    Suspicious use of AdjustPrivilegeToken
    Suspicious use of WriteProcessMemory
    PID:1684
    • C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\zIxmnitlaifc.vbs"
      Suspicious use of WriteProcessMemory
      PID:1512
      • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath C:\,'C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\notpad\notpad\notpad.exe'
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        PID:668
    • C:\Users\Admin\AppData\Local\Temp\IMG052361778.exe
      C:\Users\Admin\AppData\Local\Temp\IMG052361778.exe
      Loads dropped DLL
      Checks processor information in registry
      Suspicious use of WriteProcessMemory
      PID:1564
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c taskkill /pid 1564 & erase C:\Users\Admin\AppData\Local\Temp\IMG052361778.exe & RD /S /Q C:\\ProgramData\\218003578373452\\* & exit
        Deletes itself
        Suspicious use of WriteProcessMemory
        PID:1324
        • C:\Windows\SysWOW64\taskkill.exe
          taskkill /pid 1564
          Kills process with taskkill
          Suspicious use of AdjustPrivilegeToken
          PID:1860
Network
MITRE ATT&CK Matrix
Command and Control
    Credential Access
    Defense Evasion
      Execution
        Exfiltration
          Impact
            Initial Access
              Lateral Movement
                Persistence
                  Privilege Escalation
                    Replay Monitor
                    00:00 00:00
                    Downloads
                    • C:\Users\Admin\AppData\Local\Temp\zIxmnitlaifc.vbs

                      MD5

                      d0b481eee3027861e4f3cc713cd9c35d

                      SHA1

                      e4178560a6fa0f344aee9edc99cc010a53e6d48a

                      SHA256

                      4bf2e0ec0a3e0511a127c023b4a1a76447697b87f23509cfe0f599e1cd2e73a8

                      SHA512

                      379b44d3875a7bbc7adcc4d455d5de81eb15f09f5886c90723321f9997e1666077fbf39c40160baa43232c417e5661540469375c50255854a4d9620b88245bdf

                    • \ProgramData\mozglue.dll

                      MD5

                      8f73c08a9660691143661bf7332c3c27

                      SHA1

                      37fa65dd737c50fda710fdbde89e51374d0c204a

                      SHA256

                      3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

                      SHA512

                      0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

                    • \ProgramData\msvcp140.dll

                      MD5

                      109f0f02fd37c84bfc7508d4227d7ed5

                      SHA1

                      ef7420141bb15ac334d3964082361a460bfdb975

                      SHA256

                      334e69ac9367f708ce601a6f490ff227d6c20636da5222f148b25831d22e13d4

                      SHA512

                      46eb62b65817365c249b48863d894b4669e20fcb3992e747cd5c9fdd57968e1b2cf7418d1c9340a89865eadda362b8db51947eb4427412eb83b35994f932fd39

                    • \ProgramData\nss3.dll

                      MD5

                      bfac4e3c5908856ba17d41edcd455a51

                      SHA1

                      8eec7e888767aa9e4cca8ff246eb2aacb9170428

                      SHA256

                      e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

                      SHA512

                      2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

                    • \ProgramData\sqlite3.dll

                      MD5

                      e477a96c8f2b18d6b5c27bde49c990bf

                      SHA1

                      e980c9bf41330d1e5bd04556db4646a0210f7409

                      SHA256

                      16574f51785b0e2fc29c2c61477eb47bb39f714829999511dc8952b43ab17660

                      SHA512

                      335a86268e7c0e568b1c30981ec644e6cd332e66f96d2551b58a82515316693c1859d87b4f4b7310cf1ac386cee671580fdd999c3bcb23acf2c2282c01c8798c

                    • \ProgramData\vcruntime140.dll

                      MD5

                      7587bf9cb4147022cd5681b015183046

                      SHA1

                      f2106306a8f6f0da5afb7fc765cfa0757ad5a628

                      SHA256

                      c40bb03199a2054dabfc7a8e01d6098e91de7193619effbd0f142a7bf031c14d

                      SHA512

                      0b63e4979846ceba1b1ed8470432ea6aa18cca66b5f5322d17b14bc0dfa4b2ee09ca300a016e16a01db5123e4e022820698f46d9bad1078bd24675b4b181e91f

                    • memory/668-74-0x0000000000810000-0x0000000000811000-memory.dmp

                    • memory/668-94-0x00000000057A0000-0x00000000057A1000-memory.dmp

                    • memory/668-89-0x00000000056D0000-0x00000000056D1000-memory.dmp

                    • memory/668-71-0x0000000000000000-mapping.dmp

                    • memory/668-118-0x0000000006300000-0x0000000006301000-memory.dmp

                    • memory/668-95-0x00000000061C0000-0x00000000061C1000-memory.dmp

                    • memory/668-75-0x0000000004930000-0x0000000004931000-memory.dmp

                    • memory/668-76-0x00000000048F0000-0x00000000048F1000-memory.dmp

                    • memory/668-77-0x00000000048F2000-0x00000000048F3000-memory.dmp

                    • memory/668-78-0x0000000002410000-0x0000000002411000-memory.dmp

                    • memory/668-79-0x00000000026D0000-0x00000000026D1000-memory.dmp

                    • memory/668-104-0x00000000055E0000-0x00000000055E1000-memory.dmp

                    • memory/668-102-0x0000000006280000-0x0000000006281000-memory.dmp

                    • memory/668-103-0x000000007EF30000-0x000000007EF31000-memory.dmp

                    • memory/668-119-0x0000000006310000-0x0000000006311000-memory.dmp

                    • memory/1324-85-0x0000000000000000-mapping.dmp

                    • memory/1512-65-0x0000000000000000-mapping.dmp

                    • memory/1512-67-0x0000000075B31000-0x0000000075B33000-memory.dmp

                    • memory/1564-68-0x0000000000400000-0x0000000000438000-memory.dmp

                    • memory/1564-69-0x000000000040717B-mapping.dmp

                    • memory/1564-72-0x0000000000400000-0x0000000000438000-memory.dmp

                    • memory/1684-63-0x0000000000D10000-0x0000000000D88000-memory.dmp

                    • memory/1684-64-0x00000000009E0000-0x00000000009FC000-memory.dmp

                    • memory/1684-62-0x0000000004B10000-0x0000000004B11000-memory.dmp

                    • memory/1684-60-0x0000000000FD0000-0x0000000000FD1000-memory.dmp

                    • memory/1860-86-0x0000000000000000-mapping.dmp