Analysis

  • max time kernel
    60s
  • max time network
    63s
  • platform
    windows7_x64
  • resource
    win7-20220715-en
  • resource tags

    arch:x64arch:x86image:win7-20220715-enlocale:en-usos:windows7-x64system
  • submitted
    12-08-2022 06:06

General

  • Target

    Request For Qoutation and Company Profile for.exe

  • Size

    832KB

  • MD5

    5be68e2fdd151ab51beb125c8796d3ac

  • SHA1

    4eaf09cda6d4ce743b2aa5b274cb66b6a58f7f4f

  • SHA256

    b1d3c9d99b280d0b6c75efbf271254f8081cf947b77d51ff8fa9fa67e61e6513

  • SHA512

    ca7a46b577c48e3ae8b86bd62b8a364ca085464823ec8f32c6f630d13cd9bc9db75de9c74ec7c2aa5ad45cc4c5bf3e41f16732b0b6502ae0dc0b074b788430cd

Malware Config

Extracted

Family

oski

C2

gconnect.pro

Signatures

  • Oski

    Oski is an infostealer targeting browser data, crypto wallets.

  • Downloads MZ/PE file
  • 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.

  • Suspicious use of SetThreadContext 1 IoCs
  • 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 18 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Request For Qoutation and Company Profile for.exe
    "C:\Users\Admin\AppData\Local\Temp\Request For Qoutation and Company Profile for.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1964
    • C:\Users\Admin\AppData\Local\Temp\Request For Qoutation and Company Profile for.exe
      "C:\Users\Admin\AppData\Local\Temp\Request For Qoutation and Company Profile for.exe"
      2⤵
      • Loads dropped DLL
      • Checks processor information in registry
      • Suspicious use of WriteProcessMemory
      PID:1496
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c taskkill /pid 1496 & erase C:\Users\Admin\AppData\Local\Temp\Request For Qoutation and Company Profile for.' & RD /S /Q C:\\ProgramData\\291998554891422\\* & exit
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1944
        • C:\Windows\SysWOW64\taskkill.exe
          taskkill /pid 1496
          4⤵
          • Kills process with taskkill
          • Suspicious use of AdjustPrivilegeToken
          PID:728

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/728-82-0x0000000000000000-mapping.dmp
  • memory/1496-74-0x0000000000400000-0x0000000000438000-memory.dmp
    Filesize

    224KB

  • memory/1496-71-0x0000000000400000-0x0000000000438000-memory.dmp
    Filesize

    224KB

  • memory/1496-81-0x0000000000400000-0x0000000000438000-memory.dmp
    Filesize

    224KB

  • memory/1496-76-0x0000000000400000-0x0000000000438000-memory.dmp
    Filesize

    224KB

  • memory/1496-62-0x0000000000400000-0x0000000000438000-memory.dmp
    Filesize

    224KB

  • memory/1496-63-0x0000000000400000-0x0000000000438000-memory.dmp
    Filesize

    224KB

  • memory/1496-65-0x0000000000400000-0x0000000000438000-memory.dmp
    Filesize

    224KB

  • memory/1496-67-0x0000000000400000-0x0000000000438000-memory.dmp
    Filesize

    224KB

  • memory/1496-69-0x0000000000400000-0x0000000000438000-memory.dmp
    Filesize

    224KB

  • memory/1496-72-0x000000000040717B-mapping.dmp
  • memory/1944-80-0x0000000000000000-mapping.dmp
  • memory/1964-59-0x0000000004B90000-0x0000000004B9C000-memory.dmp
    Filesize

    48KB

  • memory/1964-54-0x00000000013A0000-0x0000000001476000-memory.dmp
    Filesize

    856KB

  • memory/1964-61-0x0000000005800000-0x000000000583A000-memory.dmp
    Filesize

    232KB

  • memory/1964-58-0x0000000001330000-0x0000000001354000-memory.dmp
    Filesize

    144KB

  • memory/1964-57-0x0000000000B40000-0x0000000000B64000-memory.dmp
    Filesize

    144KB

  • memory/1964-56-0x0000000000780000-0x00000000007A4000-memory.dmp
    Filesize

    144KB

  • memory/1964-60-0x0000000007DB0000-0x0000000007E28000-memory.dmp
    Filesize

    480KB

  • memory/1964-55-0x0000000076901000-0x0000000076903000-memory.dmp
    Filesize

    8KB