Analysis

  • max time kernel
    133s
  • max time network
    39s
  • platform
    windows7_x64
  • resource
    win7-en-20210920
  • submitted
    19-10-2021 14:44

General

  • Target

    New PO.xlsx

  • Size

    369KB

  • MD5

    e883ef4023d37cee1dfb1f9931d2fe37

  • SHA1

    bc0810d04f38a3dd153c5d9faaec63f93f85ddd2

  • SHA256

    4d0e73e1fa9440b0fdbb6b73901fd8ecc618600b2cfe4a07cfb8f6696a1199e0

  • SHA512

    7e85bb566f5c86bc0b6c7b506ea75fc54e33cdecb02faad5a7c3218053c63cb8de2326e99dcc1e4a21980d385e55dcb582e13ccb004dcf61151835759e67154c

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.everywhere-gtt.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    chidiebere1994

Signatures

  • AgentTesla

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

  • AgentTesla Payload 5 IoCs
  • Blocklisted process makes network request 1 IoCs
  • Downloads MZ/PE file
  • Drops file in Drivers directory 1 IoCs
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 2 IoCs
  • Obfuscated with Agile.Net obfuscator 1 IoCs

    Detects use of the Agile.Net commercial obfuscator, which is capable of entity renaming and control flow obfuscation.

  • 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.

  • Uses the VBS compiler for execution 1 TTPs
  • Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates system info in registry 2 TTPs 1 IoCs
  • Launches Equation Editor 1 TTPs 1 IoCs

    Equation Editor is an old Office component often targeted by exploits such as CVE-2017-11882.

  • Modifies Internet Explorer settings 1 TTPs 31 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 16 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
    "C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde "C:\Users\Admin\AppData\Local\Temp\New PO.xlsx"
    1⤵
    • Enumerates system info in registry
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    PID:2032
  • C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE
    "C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding
    1⤵
    • Blocklisted process makes network request
    • Loads dropped DLL
    • Launches Equation Editor
    • Suspicious use of WriteProcessMemory
    PID:368
    • C:\Users\Public\vbc.exe
      "C:\Users\Public\vbc.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:952
      • C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe
        "C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe"
        3⤵
        • Drops file in Drivers directory
        • Executes dropped EXE
        • Accesses Microsoft Outlook profiles
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • outlook_office_path
        • outlook_win_path
        PID:752

Network

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scripting

1
T1064

Exploitation for Client Execution

1
T1203

Defense Evasion

Scripting

1
T1064

Modify Registry

1
T1112

Credential Access

Credentials in Files

3
T1081

Discovery

Query Registry

1
T1012

System Information Discovery

1
T1082

Collection

Data from Local System

3
T1005

Email Collection

1
T1114

Replay Monitor

Loading Replay Monitor...

Downloads

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

    91c9ae9c9a17a9db5e08b120e668c74c

    SHA1

    50770954c1ceb0bb6f1d5d3f2de2a0a065773723

    SHA256

    e56a7e5d3ab9675555e2897fc3faa2dd9265008a4967a7d54030ab8184d2d38f

    SHA512

    ca504af192e3318359d4742a2ef26ae1b5d040a4f9942782e02549a310158d5d5dbf919b4c748c31ee609d2046bd23ee0c22712891c86ae4a1e3a58c6e67647e

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

    91c9ae9c9a17a9db5e08b120e668c74c

    SHA1

    50770954c1ceb0bb6f1d5d3f2de2a0a065773723

    SHA256

    e56a7e5d3ab9675555e2897fc3faa2dd9265008a4967a7d54030ab8184d2d38f

    SHA512

    ca504af192e3318359d4742a2ef26ae1b5d040a4f9942782e02549a310158d5d5dbf919b4c748c31ee609d2046bd23ee0c22712891c86ae4a1e3a58c6e67647e

  • C:\Users\Public\vbc.exe
    MD5

    88ef9621b800849bb2916f4d6654de32

    SHA1

    5b488137ea06640c1895286ccf4994b65334ae8f

    SHA256

    28fc5135ea1f14ea296184a3e518908ae77d88f100efa162bf30c046790197a3

    SHA512

    50dc29078db22d56925ea89a06cc1c13419854457b5a3a38327cf58bee81f49cc9d19fdc9725e8051b6bb6ca10d070ae2123f759135e2be49c6260cc405f54b5

  • C:\Users\Public\vbc.exe
    MD5

    88ef9621b800849bb2916f4d6654de32

    SHA1

    5b488137ea06640c1895286ccf4994b65334ae8f

    SHA256

    28fc5135ea1f14ea296184a3e518908ae77d88f100efa162bf30c046790197a3

    SHA512

    50dc29078db22d56925ea89a06cc1c13419854457b5a3a38327cf58bee81f49cc9d19fdc9725e8051b6bb6ca10d070ae2123f759135e2be49c6260cc405f54b5

  • \Users\Admin\AppData\Local\Temp\InstallUtil.exe
    MD5

    91c9ae9c9a17a9db5e08b120e668c74c

    SHA1

    50770954c1ceb0bb6f1d5d3f2de2a0a065773723

    SHA256

    e56a7e5d3ab9675555e2897fc3faa2dd9265008a4967a7d54030ab8184d2d38f

    SHA512

    ca504af192e3318359d4742a2ef26ae1b5d040a4f9942782e02549a310158d5d5dbf919b4c748c31ee609d2046bd23ee0c22712891c86ae4a1e3a58c6e67647e

  • \Users\Public\vbc.exe
    MD5

    88ef9621b800849bb2916f4d6654de32

    SHA1

    5b488137ea06640c1895286ccf4994b65334ae8f

    SHA256

    28fc5135ea1f14ea296184a3e518908ae77d88f100efa162bf30c046790197a3

    SHA512

    50dc29078db22d56925ea89a06cc1c13419854457b5a3a38327cf58bee81f49cc9d19fdc9725e8051b6bb6ca10d070ae2123f759135e2be49c6260cc405f54b5

  • memory/368-57-0x00000000765A1000-0x00000000765A3000-memory.dmp
    Filesize

    8KB

  • memory/752-73-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/752-75-0x000000000043771E-mapping.dmp
  • memory/752-82-0x0000000004A11000-0x0000000004A12000-memory.dmp
    Filesize

    4KB

  • memory/752-80-0x0000000004A10000-0x0000000004A11000-memory.dmp
    Filesize

    4KB

  • memory/752-78-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/752-74-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/752-72-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/752-71-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/752-70-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/952-59-0x0000000000000000-mapping.dmp
  • memory/952-68-0x00000000045C0000-0x00000000045C1000-memory.dmp
    Filesize

    4KB

  • memory/952-67-0x0000000000FA0000-0x0000000000FAB000-memory.dmp
    Filesize

    44KB

  • memory/952-62-0x00000000010E0000-0x00000000010E1000-memory.dmp
    Filesize

    4KB

  • memory/952-66-0x00000000049B1000-0x00000000049B2000-memory.dmp
    Filesize

    4KB

  • memory/952-65-0x0000000000F70000-0x0000000000F91000-memory.dmp
    Filesize

    132KB

  • memory/952-64-0x00000000049B0000-0x00000000049B1000-memory.dmp
    Filesize

    4KB

  • memory/2032-54-0x000000002FEE1000-0x000000002FEE4000-memory.dmp
    Filesize

    12KB

  • memory/2032-56-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB

  • memory/2032-55-0x0000000071C51000-0x0000000071C53000-memory.dmp
    Filesize

    8KB

  • memory/2032-81-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB