Analysis

  • max time kernel
    144s
  • max time network
    147s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • submitted
    25-08-2022 13:25

General

  • Target

    Builded.exe

  • Size

    159KB

  • MD5

    00d5cd42c25e75858eb8078585022140

  • SHA1

    51ceb557b9d65f9d7e7c0aa9f31a6a9bb584b8f4

  • SHA256

    cdbbca5bc9428b5e403f4af071affbfe74b90c1b3244908bb0470d214f080205

  • SHA512

    e88ef22f6cf527d99e65abe2c24625eddb49e8a25b90648319e0d9ac17e8f0dec79a7d5050b7ccec21ffe14a71181dc7449b217c25ca3c028a8e5485419be55e

  • SSDEEP

    3072:UjTFcBgI8VBs+Zv3mniJNjK0HvtCDKuNt+5JSp8Bb8EG:gFQ1K+K2ni/JHVye8EG

Malware Config

Extracted

Family

marsstealer

Botnet

Default

C2

mars.housewall.xyz/gate.php

Signatures

  • Mars Stealer

    An infostealer written in C++ based on other infostealers.

  • Loads dropped DLL 2 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Modifies system certificate store 2 TTPs 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Builded.exe
    "C:\Users\Admin\AppData\Local\Temp\Builded.exe"
    1⤵
    • Loads dropped DLL
    • Checks processor information in registry
    • Modifies system certificate store
    PID:1052

Network

MITRE ATT&CK Matrix ATT&CK v6

Defense Evasion

Install Root Certificate

1
T1130

Modify Registry

1
T1112

Credential Access

Credentials in Files

2
T1081

Discovery

Query Registry

2
T1012

System Information Discovery

1
T1082

Collection

Data from Local System

2
T1005

Replay Monitor

Loading Replay Monitor...

Downloads

  • \ProgramData\mozglue.dll
    Filesize

    133KB

    MD5

    8f73c08a9660691143661bf7332c3c27

    SHA1

    37fa65dd737c50fda710fdbde89e51374d0c204a

    SHA256

    3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

    SHA512

    0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

  • \ProgramData\nss3.dll
    Filesize

    1.2MB

    MD5

    bfac4e3c5908856ba17d41edcd455a51

    SHA1

    8eec7e888767aa9e4cca8ff246eb2aacb9170428

    SHA256

    e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

    SHA512

    2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

  • memory/1052-54-0x0000000000400000-0x000000000043D000-memory.dmp
    Filesize

    244KB

  • memory/1052-55-0x0000000075931000-0x0000000075933000-memory.dmp
    Filesize

    8KB

  • memory/1052-56-0x0000000060900000-0x0000000060992000-memory.dmp
    Filesize

    584KB

  • memory/1052-77-0x0000000000400000-0x000000000043D000-memory.dmp
    Filesize

    244KB