Analysis

  • max time kernel
    120s
  • max time network
    123s
  • platform
    windows7_x64
  • resource
    win7v20210410
  • submitted
    06-07-2021 15:49

General

  • Target

    SecuriteInfo.com.W32.MSIL_Kryptik.ERY.genEldorado.22139.11301.exe

  • Size

    700KB

  • MD5

    4c33a8d7ea67f81000eee8b1c9475f9c

  • SHA1

    a96a1a2cd37af1a04fafc9104b59661924c2c2a0

  • SHA256

    3fa53f6f68e280013eb9651a53a3c40a16fa99f7689d0761b3f95b2de68b22cf

  • SHA512

    d93206e78dbfc4e1ca1633172c7aeb93ba6270822e7f8880220599731d9db4299ea85e1d14d59929ebe6e9b812d09f8db180df4fa4f2bbc93fc4d8a0aad87cf0

Malware Config

Signatures

  • Detect Neshta Payload 3 IoCs
  • Modifies system executable filetype association 2 TTPs 1 IoCs
  • Neshta

    Malware from the neshta family is designed to infect itself into other files to spread itself and cause damage.

  • 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.

  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 1 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.W32.MSIL_Kryptik.ERY.genEldorado.22139.11301.exe
    "C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.W32.MSIL_Kryptik.ERY.genEldorado.22139.11301.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1080
    • C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.W32.MSIL_Kryptik.ERY.genEldorado.22139.11301.exe
      "{path}"
      2⤵
      • Modifies system executable filetype association
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Drops file in Windows directory
      • Modifies registry class
      PID:456

Network

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Change Default File Association

1
T1042

Defense Evasion

Modify Registry

1
T1112

Credential Access

Credentials in Files

1
T1081

Discovery

System Information Discovery

1
T1082

Collection

Data from Local System

1
T1005

Replay Monitor

Loading Replay Monitor...

Downloads

  • \PROGRA~2\Adobe\READER~1.0\Reader\LOGTRA~1.EXE
    MD5

    9e2b9928c89a9d0da1d3e8f4bd96afa7

    SHA1

    ec66cda99f44b62470c6930e5afda061579cde35

    SHA256

    8899b4ed3446b7d55b54defbc1acb7c5392a4b3bc8ec2cdc7c31171708965043

    SHA512

    2ca5ad1d0e12a8049de885b90b7f56fe77c868e0d6dae4ec4b6f3bc0bf7b2e73295cc9b1328c2b45357ffb0d7804622ab3f91a56140b098e93b691032d508156

  • \PROGRA~2\Google\Temp\GUME011.tmp\GOFB2B~1.EXE
    MD5

    583ff3367e050c4d62bc03516473b40a

    SHA1

    6aa1d26352b78310e711884829c35a69ed1bf0f9

    SHA256

    6b63f8dd47d8b3baa71b6cd205d428861b96bf09cf479071e75ddd23f97c0146

    SHA512

    e9bdd5cc2e29db48cc524488fbadb08e808f17f6e18fa595cfebae229c94f2547079e52a2ada214169577b89b2ffbef424729cd90acdea3774f5c76aec192be0

  • \PROGRA~2\Google\Update\1335~1.452\GOFB2B~1.EXE
    MD5

    583ff3367e050c4d62bc03516473b40a

    SHA1

    6aa1d26352b78310e711884829c35a69ed1bf0f9

    SHA256

    6b63f8dd47d8b3baa71b6cd205d428861b96bf09cf479071e75ddd23f97c0146

    SHA512

    e9bdd5cc2e29db48cc524488fbadb08e808f17f6e18fa595cfebae229c94f2547079e52a2ada214169577b89b2ffbef424729cd90acdea3774f5c76aec192be0

  • memory/456-69-0x0000000000400000-0x000000000041B000-memory.dmp
    Filesize

    108KB

  • memory/456-66-0x0000000000400000-0x000000000041B000-memory.dmp
    Filesize

    108KB

  • memory/456-67-0x00000000004080E4-mapping.dmp
  • memory/456-68-0x00000000766D1000-0x00000000766D3000-memory.dmp
    Filesize

    8KB

  • memory/1080-64-0x000000000A1C0000-0x000000000A244000-memory.dmp
    Filesize

    528KB

  • memory/1080-65-0x00000000005A0000-0x00000000005DD000-memory.dmp
    Filesize

    244KB

  • memory/1080-59-0x0000000000F90000-0x0000000000F91000-memory.dmp
    Filesize

    4KB

  • memory/1080-63-0x00000000049A0000-0x00000000049A1000-memory.dmp
    Filesize

    4KB

  • memory/1080-62-0x0000000000360000-0x0000000000362000-memory.dmp
    Filesize

    8KB

  • memory/1080-61-0x0000000000E90000-0x0000000000EF2000-memory.dmp
    Filesize

    392KB