Analysis

  • max time kernel
    103s
  • max time network
    80s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    21-05-2022 10:45

General

  • Target

    SOA # 87594094.xlsx

  • Size

    224KB

  • MD5

    00d8cbaa1a4eb56066dae9e213bc9503

  • SHA1

    01aa1fb71e86714f6cba7f17b5e80ad707583e66

  • SHA256

    f8fe8c2f2bacb1bd5b18725526e4212a035085b22b7170c0a19f4fd40fd6fa10

  • SHA512

    483cb412524d2f8032a19060f59e321c8c2e7a9bb86a3f081a633a4315e06ff179ddf9691cce1fcb5bfa4f5fee407616e7ca5c03dc51677d8bd900129d0aeab4

Malware Config

Extracted

Family

agenttesla

C2

https://api.telegram.org/bot5368056296:AAHgHHTnRAZx9eL5AZ1arY8hwWaEJUMdR18/sendDocument

Signatures

  • AgentTesla

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

  • Blocklisted process makes network request 1 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 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.

  • 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 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 13 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\SOA # 87594094.xlsx"
    1⤵
    • Enumerates system info in registry
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    PID:388
  • 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:1468
    • C:\Users\Public\vbc.exe
      "C:\Users\Public\vbc.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • Suspicious use of WriteProcessMemory
      PID:700
      • C:\Users\Public\vbc.exe
        "C:\Users\Public\vbc.exe"
        3⤵
        • Executes dropped EXE
        • Accesses Microsoft Outlook profiles
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        • outlook_office_path
        • outlook_win_path
        PID:1060

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\Public\vbc.exe
    Filesize

    680KB

    MD5

    d29958ffc3ebde050e992fe24b7d735a

    SHA1

    a2d56009c08f6f44ebcb42a1594a6a20530a6c6f

    SHA256

    75f2ff197bf14319cfa73c515597453f6a50d56ce2fe39c384f445b3431a9960

    SHA512

    ad845dcec8ed0c1fe4499e553fa1c0c632d9f2e5b909e32356514ec165113e0676784a106826fb6d73da8c1ee7810aa860fe1bb295046cce7895532af4050a62

  • C:\Users\Public\vbc.exe
    Filesize

    680KB

    MD5

    d29958ffc3ebde050e992fe24b7d735a

    SHA1

    a2d56009c08f6f44ebcb42a1594a6a20530a6c6f

    SHA256

    75f2ff197bf14319cfa73c515597453f6a50d56ce2fe39c384f445b3431a9960

    SHA512

    ad845dcec8ed0c1fe4499e553fa1c0c632d9f2e5b909e32356514ec165113e0676784a106826fb6d73da8c1ee7810aa860fe1bb295046cce7895532af4050a62

  • C:\Users\Public\vbc.exe
    Filesize

    680KB

    MD5

    d29958ffc3ebde050e992fe24b7d735a

    SHA1

    a2d56009c08f6f44ebcb42a1594a6a20530a6c6f

    SHA256

    75f2ff197bf14319cfa73c515597453f6a50d56ce2fe39c384f445b3431a9960

    SHA512

    ad845dcec8ed0c1fe4499e553fa1c0c632d9f2e5b909e32356514ec165113e0676784a106826fb6d73da8c1ee7810aa860fe1bb295046cce7895532af4050a62

  • \Users\Public\vbc.exe
    Filesize

    680KB

    MD5

    d29958ffc3ebde050e992fe24b7d735a

    SHA1

    a2d56009c08f6f44ebcb42a1594a6a20530a6c6f

    SHA256

    75f2ff197bf14319cfa73c515597453f6a50d56ce2fe39c384f445b3431a9960

    SHA512

    ad845dcec8ed0c1fe4499e553fa1c0c632d9f2e5b909e32356514ec165113e0676784a106826fb6d73da8c1ee7810aa860fe1bb295046cce7895532af4050a62

  • \Users\Public\vbc.exe
    Filesize

    680KB

    MD5

    d29958ffc3ebde050e992fe24b7d735a

    SHA1

    a2d56009c08f6f44ebcb42a1594a6a20530a6c6f

    SHA256

    75f2ff197bf14319cfa73c515597453f6a50d56ce2fe39c384f445b3431a9960

    SHA512

    ad845dcec8ed0c1fe4499e553fa1c0c632d9f2e5b909e32356514ec165113e0676784a106826fb6d73da8c1ee7810aa860fe1bb295046cce7895532af4050a62

  • memory/388-54-0x000000002F6B1000-0x000000002F6B4000-memory.dmp
    Filesize

    12KB

  • memory/388-55-0x0000000071C41000-0x0000000071C43000-memory.dmp
    Filesize

    8KB

  • memory/388-56-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB

  • memory/388-57-0x0000000076C81000-0x0000000076C83000-memory.dmp
    Filesize

    8KB

  • memory/388-58-0x0000000072C2D000-0x0000000072C38000-memory.dmp
    Filesize

    44KB

  • memory/388-84-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB

  • memory/700-68-0x0000000005910000-0x00000000059AA000-memory.dmp
    Filesize

    616KB

  • memory/700-65-0x0000000000E30000-0x0000000000EDA000-memory.dmp
    Filesize

    680KB

  • memory/700-69-0x0000000000A30000-0x0000000000A36000-memory.dmp
    Filesize

    24KB

  • memory/700-70-0x0000000000A60000-0x0000000000AA0000-memory.dmp
    Filesize

    256KB

  • memory/700-67-0x0000000000270000-0x000000000027E000-memory.dmp
    Filesize

    56KB

  • memory/700-62-0x0000000000000000-mapping.dmp
  • memory/1060-71-0x0000000000400000-0x000000000043A000-memory.dmp
    Filesize

    232KB

  • memory/1060-75-0x0000000000400000-0x000000000043A000-memory.dmp
    Filesize

    232KB

  • memory/1060-77-0x0000000000435CFE-mapping.dmp
  • memory/1060-76-0x0000000000400000-0x000000000043A000-memory.dmp
    Filesize

    232KB

  • memory/1060-74-0x0000000000400000-0x000000000043A000-memory.dmp
    Filesize

    232KB

  • memory/1060-82-0x0000000000400000-0x000000000043A000-memory.dmp
    Filesize

    232KB

  • memory/1060-80-0x0000000000400000-0x000000000043A000-memory.dmp
    Filesize

    232KB

  • memory/1060-72-0x0000000000400000-0x000000000043A000-memory.dmp
    Filesize

    232KB