Analysis

  • max time kernel
    65s
  • max time network
    134s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    14-04-2021 13:41

General

  • Target

    SecuriteInfo.com.BackDoor.Wirenet.557.20049.13436.exe

  • Size

    304KB

  • MD5

    3061e2d44678262f26d3f68a419bea3a

  • SHA1

    546ad4d518a1ed317dee8bc1331249a10debebcc

  • SHA256

    db23d6f5e2123cde47f4e3178bf18063aa3270d13499991200c9074a837eff07

  • SHA512

    b397ba5f1e08e247ab3c3ca27877d6e8add173eea292621a38e45ad67bd01083676bce9a4752a4389db23c2bccefcbee356a0a7806d9aa2b3ede1e26b9cbc731

Malware Config

Extracted

Family

oski

C2

novget.com

Signatures

  • Oski

    Oski is an infostealer targeting browser data, crypto wallets.

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

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

  • Suspicious use of SetThreadContext 1 IoCs
  • Program crash 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 16 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.BackDoor.Wirenet.557.20049.13436.exe
    "C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.BackDoor.Wirenet.557.20049.13436.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1456
    • C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.BackDoor.Wirenet.557.20049.13436.exe
      C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.BackDoor.Wirenet.557.20049.13436.exe
      2⤵
      • Loads dropped DLL
      PID:2188
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 2188 -s 1232
        3⤵
        • Program crash
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:3940

Network

MITRE ATT&CK Matrix ATT&CK v6

Credential Access

Credentials in Files

1
T1081

Collection

Data from Local System

1
T1005

Replay Monitor

Loading Replay Monitor...

Downloads

  • \ProgramData\mozglue.dll
    MD5

    8f73c08a9660691143661bf7332c3c27

    SHA1

    37fa65dd737c50fda710fdbde89e51374d0c204a

    SHA256

    3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

    SHA512

    0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

  • \ProgramData\nss3.dll
    MD5

    bfac4e3c5908856ba17d41edcd455a51

    SHA1

    8eec7e888767aa9e4cca8ff246eb2aacb9170428

    SHA256

    e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

    SHA512

    2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

  • memory/1456-121-0x0000000005DB0000-0x0000000005DB2000-memory.dmp
    Filesize

    8KB

  • memory/1456-118-0x00000000058F0000-0x00000000058F1000-memory.dmp
    Filesize

    4KB

  • memory/1456-119-0x00000000059B0000-0x00000000059B1000-memory.dmp
    Filesize

    4KB

  • memory/1456-120-0x00000000058F3000-0x00000000058F5000-memory.dmp
    Filesize

    8KB

  • memory/1456-114-0x0000000000FA0000-0x0000000000FA1000-memory.dmp
    Filesize

    4KB

  • memory/1456-122-0x0000000008E40000-0x0000000008E41000-memory.dmp
    Filesize

    4KB

  • memory/1456-123-0x0000000007320000-0x0000000007321000-memory.dmp
    Filesize

    4KB

  • memory/1456-124-0x0000000007390000-0x00000000073C3000-memory.dmp
    Filesize

    204KB

  • memory/1456-117-0x0000000005900000-0x0000000005901000-memory.dmp
    Filesize

    4KB

  • memory/1456-116-0x0000000005E00000-0x0000000005E01000-memory.dmp
    Filesize

    4KB

  • memory/2188-125-0x0000000000400000-0x0000000000438000-memory.dmp
    Filesize

    224KB

  • memory/2188-126-0x000000000040717B-mapping.dmp
  • memory/2188-127-0x0000000000400000-0x0000000000438000-memory.dmp
    Filesize

    224KB