Analysis

  • max time kernel
    127s
  • max time network
    128s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    08-03-2023 04:16

General

  • Target

    bda7463e881f4e14faadc83828e4fd6f.exe

  • Size

    200KB

  • MD5

    bda7463e881f4e14faadc83828e4fd6f

  • SHA1

    4518f0f4b69f2af95d373d09f35bac1f800a7bdf

  • SHA256

    56e6f4171172dff458498dea319ababfc8648a31c78df18b1c23d5189d059a8d

  • SHA512

    cb9838b7395c1f849fc6fe0f0f916d0cf105a93431d9d16fec8f8cf0ec0a05a7ec7c72fb3bc9af5ba4a2aeaaa1dda5f973cce2501094be007feae883ee8c7428

  • SSDEEP

    3072:WfUomEuYm98dlSq7gt5q7Dx+XgS6aCEwhOfUbCalNT2pbB3fI21Xi6FLPo3c:WfUauY68uSWCx+XA7mg2pN71Ljo3c

Malware Config

Signatures

  • Oski

    Oski is an infostealer targeting browser data, crypto wallets.

  • Downloads MZ/PE file
  • Deletes itself 1 IoCs
  • Loads dropped DLL 3 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Checks installed software on the system 1 TTPs

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

  • 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 1 IoCs

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

  • Kills process with taskkill 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\bda7463e881f4e14faadc83828e4fd6f.exe
    "C:\Users\Admin\AppData\Local\Temp\bda7463e881f4e14faadc83828e4fd6f.exe"
    1⤵
    • Loads dropped DLL
    • Checks processor information in registry
    • Suspicious use of WriteProcessMemory
    PID:1192
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /pid 1192 & erase C:\Users\Admin\AppData\Local\Temp\bda7463e881f4e14faadc83828e4fd6f.exe & RD /S /Q C:\\ProgramData\\204107134474665\\* & exit
      2⤵
      • Deletes itself
      • Suspicious use of WriteProcessMemory
      PID:1852
      • C:\Windows\SysWOW64\taskkill.exe
        taskkill /pid 1192
        3⤵
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:2012

Network

MITRE ATT&CK Matrix ATT&CK v6

Credential Access

Credentials in Files

2
T1081

Discovery

Query Registry

2
T1012

System Information Discovery

2
T1082

Collection

Data from Local System

2
T1005

Replay Monitor

Loading Replay Monitor...

Downloads

  • \ProgramData\mozglue.dll
    Filesize

    133KB

    MD5

    8f73c08a9660691143661bf7332c3c27

    SHA1

    37fa65dd737c50fda710fdbde89e51374d0c204a

    SHA256

    3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

    SHA512

    0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

  • \ProgramData\nss3.dll
    Filesize

    1.2MB

    MD5

    bfac4e3c5908856ba17d41edcd455a51

    SHA1

    8eec7e888767aa9e4cca8ff246eb2aacb9170428

    SHA256

    e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

    SHA512

    2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

  • \ProgramData\sqlite3.dll
    Filesize

    630KB

    MD5

    e477a96c8f2b18d6b5c27bde49c990bf

    SHA1

    e980c9bf41330d1e5bd04556db4646a0210f7409

    SHA256

    16574f51785b0e2fc29c2c61477eb47bb39f714829999511dc8952b43ab17660

    SHA512

    335a86268e7c0e568b1c30981ec644e6cd332e66f96d2551b58a82515316693c1859d87b4f4b7310cf1ac386cee671580fdd999c3bcb23acf2c2282c01c8798c

  • memory/1192-66-0x0000000060900000-0x0000000060992000-memory.dmp
    Filesize

    584KB

  • memory/1192-69-0x0000000060900000-0x0000000060992000-memory.dmp
    Filesize

    584KB

  • memory/1192-72-0x0000000060900000-0x0000000060992000-memory.dmp
    Filesize

    584KB

  • memory/1192-79-0x0000000060900000-0x0000000060992000-memory.dmp
    Filesize

    584KB