Analysis

  • max time kernel
    91s
  • max time network
    115s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    28-01-2021 07:33

General

  • Target

    0007334.xlsx (~2.2 MB).exe

  • Size

    778KB

  • MD5

    284989f47cbc30eaa179357f03335df7

  • SHA1

    5fe3595529dfae1e3b908fe235bb232ac84c0629

  • SHA256

    27835347fbef2d9391f2c463b367b56778946b2b64cd504961155f288f101037

  • SHA512

    cfb51f200707a45c78686fa0f3cb7666b2df1b3093975a6b9433709ff2881b5957a5d97b04d21357997b1859cae8d9f0efebe6ed63a380b2878f2fb734172b4d

Malware Config

Signatures

  • AgentTesla

    Agent Tesla is a remote access tool (RAT) written in visual basic.

  • AgentTesla Payload 1 IoCs
  • Executes dropped EXE 2 IoCs
  • Reads data files stored by FTP clients 2 TTPs

    Tries to access configuration files associated with programs like FileZilla.

  • Reads user/profile data of local email clients 2 TTPs

    Email clients store some user data on disk where infostealers will often target it.

  • 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
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 10 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 7 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\0007334.xlsx (~2.2 MB).exe
    "C:\Users\Admin\AppData\Local\Temp\0007334.xlsx (~2.2 MB).exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3108
    • C:\Users\Admin\AppData\Local\Temp\lnogrsyiy.exe
      C:\Users\Admin\AppData\Local\Temp\lnogrsyiy.exe C:\Users\Admin\AppData\Local\Temp\yegqj.tj
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of WriteProcessMemory
      PID:1708
      • C:\Users\Admin\AppData\Local\Temp\jmf6tkehw9.exe
        C:\Users\Admin\AppData\Local\Temp\lnogrsyiy.exe C:\Users\Admin\AppData\Local\Temp\yegqj.tj
        3⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:2800

Network

MITRE ATT&CK Matrix ATT&CK v6

Credential Access

Credentials in Files

3
T1081

Discovery

System Information Discovery

1
T1082

Collection

Data from Local System

3
T1005

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\jmf6tkehw9.exe
    MD5

    535dd1329aef11bf4654b3270f026d5b

    SHA1

    9c84de0bde8333f852120ab40710545b3f799300

    SHA256

    b31445fc4b8803d1b7122a6563002cfe3e925ffd1fdc9b84fba6fc78f6a8b955

    SHA512

    a552e20a09a796a6e3e18dece308880069c958cf9136bb4fc3ee726d6bc9b2f8eddbcff06ff9f9ded4dd268f5d0f39d516ad42ecce6455a4bf5cf4f3cb4c4ecc

  • C:\Users\Admin\AppData\Local\Temp\lnogrsyiy.exe
    MD5

    c56b5f0201a3b3de53e561fe76912bfd

    SHA1

    2a4062e10a5de813f5688221dbeb3f3ff33eb417

    SHA256

    237d1bca6e056df5bb16a1216a434634109478f882d3b1d58344c801d184f95d

    SHA512

    195b98245bb820085ae9203cdb6d470b749d1f228908093e8606453b027b7d7681ccd7952e30c2f5dd40f8f0b999ccfc60ebb03419b574c08de6816e75710d2c

  • C:\Users\Admin\AppData\Local\Temp\lnogrsyiy.exe
    MD5

    c56b5f0201a3b3de53e561fe76912bfd

    SHA1

    2a4062e10a5de813f5688221dbeb3f3ff33eb417

    SHA256

    237d1bca6e056df5bb16a1216a434634109478f882d3b1d58344c801d184f95d

    SHA512

    195b98245bb820085ae9203cdb6d470b749d1f228908093e8606453b027b7d7681ccd7952e30c2f5dd40f8f0b999ccfc60ebb03419b574c08de6816e75710d2c

  • C:\Users\Admin\AppData\Local\Temp\wwqrftmm.q
    MD5

    83e4950e513919c78f4a9bf4dbc04c08

    SHA1

    cae9a52fee439040e36ef28899404da14e1dc7f0

    SHA256

    0e297bcb3da75d0436488132509a335a1503aaeb783a80fe151233cabad42bd8

    SHA512

    8f9ab858af4d5929cc2972487638bb446c85fbe1b926f793c9d92bf0f3c42da4b978036724fcdd53c473ba88d96b2543daaade8518fab87d61f89d103f96bda1

  • C:\Users\Admin\AppData\Local\Temp\yegqj.tj
    MD5

    d1dbcb5fa281fbfe034e6d63ac7c0efc

    SHA1

    a6f406170d8b69ee2a4b4da3650af20397eb6386

    SHA256

    569774e749baef7e9af3e729a6465df797fb0421b1107adebc212b046a305780

    SHA512

    d7300642686ec934ef6e96b137944557d6508e343e047ab49944a43b8376cbcf1d4be9994a337e2d36fc2b3f7599da469f4b5ad3ec57d753d15930d317365b21

  • memory/1708-9-0x0000000000BF0000-0x0000000000BF2000-memory.dmp
    Filesize

    8KB

  • memory/1708-2-0x0000000000000000-mapping.dmp
  • memory/2800-7-0x000000000040188B-mapping.dmp
  • memory/2800-10-0x0000000000400000-0x000000000044B000-memory.dmp
    Filesize

    300KB

  • memory/2800-12-0x00000000026E1000-0x00000000026E2000-memory.dmp
    Filesize

    4KB

  • memory/2800-11-0x00000000026E0000-0x00000000026E1000-memory.dmp
    Filesize

    4KB

  • memory/2800-14-0x00000000026E7000-0x00000000026E8000-memory.dmp
    Filesize

    4KB

  • memory/2800-13-0x00000000026E2000-0x00000000026E4000-memory.dmp
    Filesize

    8KB

  • memory/2800-15-0x00000000026E8000-0x00000000026E9000-memory.dmp
    Filesize

    4KB

  • memory/2800-16-0x00000000026ED000-0x00000000026EF000-memory.dmp
    Filesize

    8KB