Analysis

  • max time kernel
    121s
  • max time network
    124s
  • platform
    windows7_x64
  • resource
    win7-20231129-en
  • resource tags

    arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
  • submitted
    22-12-2023 04:59

General

  • Target

    6bd2d0c64ce33ca5522c34a8927db8dd.exe

  • Size

    274KB

  • MD5

    6bd2d0c64ce33ca5522c34a8927db8dd

  • SHA1

    370a93b652c6d566c5921d727e298adf9640aa87

  • SHA256

    d17470457a84cb120cf0fde0c405ae82a954c39534368e2cb9c6798823c69fe3

  • SHA512

    3275e4de111ff3da91b5c53c1d4124bf536f436c763b072f574d19f8f43c88e95d614915ebb73876d68086b3bc4eddc60fabd1e5ca428f56e3e37d922b3ff3f4

  • SSDEEP

    6144:Mf+BLtABPD9NF/DVGK7zeNL+wN41V6GIeyXGRA1D0nmG:KNKK7zeNLXY69eyXL1DdG

Malware Config

Extracted

Family

44caliber

C2

https://discord.com/api/webhooks/882980614087794780/2EXTWMBoMH9DQog67zK2ten38diDtxtqRM8VZIXtVQBTQ1ytliHQMSQQ6ozPiihxhSIW

Signatures

  • 44Caliber

    An open source infostealer written in C#.

  • 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
  • Looks up external IP address via web service 2 IoCs

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

  • 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 4 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\6bd2d0c64ce33ca5522c34a8927db8dd.exe
    "C:\Users\Admin\AppData\Local\Temp\6bd2d0c64ce33ca5522c34a8927db8dd.exe"
    1⤵
    • Checks processor information in registry
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    PID:3044

Network

MITRE ATT&CK Matrix ATT&CK v13

Defense Evasion

Subvert Trust Controls

1
T1553

Install Root Certificate

1
T1553.004

Modify Registry

1
T1112

Credential Access

Unsecured Credentials

2
T1552

Credentials In Files

2
T1552.001

Discovery

Query Registry

1
T1012

System Information Discovery

1
T1082

Collection

Data from Local System

2
T1005

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\44\Process.txt
    Filesize

    386B

    MD5

    e77d74b4ce44a3f5f922c7588a644ded

    SHA1

    9e45f67ad625cdc5a205dcbd1703393399e941dd

    SHA256

    390abdcedddd53c2661d725fc107f3bdc41e17990ec8f795ff8867d0f03772c7

    SHA512

    803b431bf6462c0eeff3d5e054a078757127ee1dca083f3cc89399fa359673ab76886539d22501e09da183bfceb4aff26bdcd850d163c2e37d76fb7a958cc387

  • memory/3044-0-0x0000000000D50000-0x0000000000D9A000-memory.dmp
    Filesize

    296KB

  • memory/3044-1-0x000007FEF61B0000-0x000007FEF6B9C000-memory.dmp
    Filesize

    9.9MB

  • memory/3044-2-0x000000001B3B0000-0x000000001B430000-memory.dmp
    Filesize

    512KB

  • memory/3044-63-0x000007FEF61B0000-0x000007FEF6B9C000-memory.dmp
    Filesize

    9.9MB