Resubmissions

01-02-2023 17:02

230201-vj6p3aah39 10

01-02-2023 17:00

230201-vjf5eacg4s 10

01-02-2023 16:57

230201-vgbrxacg2y 10

Analysis

  • max time kernel
    103s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    01-02-2023 16:57

General

  • Target

    PO-8372929.xls

  • Size

    461KB

  • MD5

    e08cf4b188d5f8bf190189983b262ea7

  • SHA1

    f84bb8baa69ca833c271697dded917bdf710c4ba

  • SHA256

    a9c45f9d9af92c5a6c64c679414488d0d60916b501768379f8ca5e15d8955bab

  • SHA512

    d7f7fb63b80a26cd8f02a38bb5ad757441013a81ad190072abdc896a9d800f4079ec28f6653acb78b17c494e6425ef35d2d297e5083a06182b91bd49e3bbdb07

  • SSDEEP

    6144:2PXZ+RwPONXoRjDhIcp0fDlavx+W26nA1V0Y5ObF0I5eMFRI5elF0I5exF0I5eC:W6GYmWIvjIcWImWI

Malware Config

Extracted

Family

snakekeylogger

Credentials

  • Protocol:
    smtp
  • Host:
    us2.smtp.mailhostbox.com
  • Port:
    587
  • Username:
    anitaa@chfusas.com
  • Password:
    wEqaPpm7

Signatures

  • Snake Keylogger

    Keylogger and Infostealer first seen in November 2020.

  • Snake Keylogger payload 6 IoCs
  • Blocklisted process makes network request 1 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 3 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
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • 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 17 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\PO-8372929.xls
    1⤵
    • Enumerates system info in registry
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    PID:2012
  • 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:1496
    • C:\Users\Public\vbc.exe
      "C:\Users\Public\vbc.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:392
      • C:\Users\Public\vbc.exe
        "C:\Users\Public\vbc.exe"
        3⤵
        • Executes dropped EXE
        PID:1668
      • 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
        • outlook_office_path
        • outlook_win_path
        PID:1964

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

    504KB

    MD5

    09b35406e447813c6aabe80f34bedc4b

    SHA1

    a322fe8de29290306f5ae7642b4452f4fb432115

    SHA256

    ea98f05d2d90731aae39655b1857b68fd99d342cb900fd9d4e132777ab980f42

    SHA512

    5ba1493d6900b838efd53486c50d46c1daaca2da18139d8699d284f0e4778f21154bcbd46fcf415fca8effa3ad5b2240ea2640d3782f7c3ea17754004fc3dbde

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

    504KB

    MD5

    09b35406e447813c6aabe80f34bedc4b

    SHA1

    a322fe8de29290306f5ae7642b4452f4fb432115

    SHA256

    ea98f05d2d90731aae39655b1857b68fd99d342cb900fd9d4e132777ab980f42

    SHA512

    5ba1493d6900b838efd53486c50d46c1daaca2da18139d8699d284f0e4778f21154bcbd46fcf415fca8effa3ad5b2240ea2640d3782f7c3ea17754004fc3dbde

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

    504KB

    MD5

    09b35406e447813c6aabe80f34bedc4b

    SHA1

    a322fe8de29290306f5ae7642b4452f4fb432115

    SHA256

    ea98f05d2d90731aae39655b1857b68fd99d342cb900fd9d4e132777ab980f42

    SHA512

    5ba1493d6900b838efd53486c50d46c1daaca2da18139d8699d284f0e4778f21154bcbd46fcf415fca8effa3ad5b2240ea2640d3782f7c3ea17754004fc3dbde

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

    504KB

    MD5

    09b35406e447813c6aabe80f34bedc4b

    SHA1

    a322fe8de29290306f5ae7642b4452f4fb432115

    SHA256

    ea98f05d2d90731aae39655b1857b68fd99d342cb900fd9d4e132777ab980f42

    SHA512

    5ba1493d6900b838efd53486c50d46c1daaca2da18139d8699d284f0e4778f21154bcbd46fcf415fca8effa3ad5b2240ea2640d3782f7c3ea17754004fc3dbde

  • \Users\Public\vbc.exe
    Filesize

    504KB

    MD5

    09b35406e447813c6aabe80f34bedc4b

    SHA1

    a322fe8de29290306f5ae7642b4452f4fb432115

    SHA256

    ea98f05d2d90731aae39655b1857b68fd99d342cb900fd9d4e132777ab980f42

    SHA512

    5ba1493d6900b838efd53486c50d46c1daaca2da18139d8699d284f0e4778f21154bcbd46fcf415fca8effa3ad5b2240ea2640d3782f7c3ea17754004fc3dbde

  • \Users\Public\vbc.exe
    Filesize

    504KB

    MD5

    09b35406e447813c6aabe80f34bedc4b

    SHA1

    a322fe8de29290306f5ae7642b4452f4fb432115

    SHA256

    ea98f05d2d90731aae39655b1857b68fd99d342cb900fd9d4e132777ab980f42

    SHA512

    5ba1493d6900b838efd53486c50d46c1daaca2da18139d8699d284f0e4778f21154bcbd46fcf415fca8effa3ad5b2240ea2640d3782f7c3ea17754004fc3dbde

  • memory/392-70-0x0000000004CC0000-0x0000000004D20000-memory.dmp
    Filesize

    384KB

  • memory/392-69-0x00000000004F0000-0x00000000004FA000-memory.dmp
    Filesize

    40KB

  • memory/392-71-0x0000000002130000-0x0000000002158000-memory.dmp
    Filesize

    160KB

  • memory/392-62-0x0000000000000000-mapping.dmp
  • memory/392-65-0x0000000000290000-0x0000000000312000-memory.dmp
    Filesize

    520KB

  • memory/392-67-0x00000000004D0000-0x00000000004E4000-memory.dmp
    Filesize

    80KB

  • memory/1964-83-0x0000000000400000-0x0000000000426000-memory.dmp
    Filesize

    152KB

  • memory/1964-78-0x0000000000400000-0x0000000000426000-memory.dmp
    Filesize

    152KB

  • memory/1964-80-0x00000000004206AE-mapping.dmp
  • memory/1964-85-0x0000000000400000-0x0000000000426000-memory.dmp
    Filesize

    152KB

  • memory/1964-79-0x0000000000400000-0x0000000000426000-memory.dmp
    Filesize

    152KB

  • memory/1964-73-0x0000000000400000-0x0000000000426000-memory.dmp
    Filesize

    152KB

  • memory/1964-74-0x0000000000400000-0x0000000000426000-memory.dmp
    Filesize

    152KB

  • memory/1964-76-0x0000000000400000-0x0000000000426000-memory.dmp
    Filesize

    152KB

  • memory/2012-68-0x000000007299D000-0x00000000729A8000-memory.dmp
    Filesize

    44KB

  • memory/2012-56-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB

  • memory/2012-55-0x00000000719B1000-0x00000000719B3000-memory.dmp
    Filesize

    8KB

  • memory/2012-54-0x000000002FF11000-0x000000002FF14000-memory.dmp
    Filesize

    12KB

  • memory/2012-57-0x000000007299D000-0x00000000729A8000-memory.dmp
    Filesize

    44KB

  • memory/2012-58-0x00000000763A1000-0x00000000763A3000-memory.dmp
    Filesize

    8KB

  • memory/2012-87-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB

  • memory/2012-88-0x000000007299D000-0x00000000729A8000-memory.dmp
    Filesize

    44KB