General

  • Target

    Set-up_v25.6.exe

  • Size

    783.7MB

  • Sample

    240615-3trynazend

  • MD5

    c5be22159dcc9229cec0c639cad9a475

  • SHA1

    9c0752bef3e137f4d222e52926efda7fe472bbc0

  • SHA256

    48530f667563a595c24f245c994484ca43c991cce4b77fd1dca8f7d486cbc389

  • SHA512

    5e9c2a4f7264471619eb4e522df0064289e6e92db53fb83d3d48a9ed69bc225ce54491dcf9ae8f12dbd58cd248b1253fcf3fa4479d1796187de98d05d0a54c56

  • SSDEEP

    196608:zt5BooB+Xac/OygqvMehWR//jqnlsyjgf+YE:VombygjK+/r++yj2

Malware Config

Extracted

Family

stealc

rc4.plain

Targets

    • Target

      Set-up_v25.6.exe

    • Size

      783.7MB

    • MD5

      c5be22159dcc9229cec0c639cad9a475

    • SHA1

      9c0752bef3e137f4d222e52926efda7fe472bbc0

    • SHA256

      48530f667563a595c24f245c994484ca43c991cce4b77fd1dca8f7d486cbc389

    • SHA512

      5e9c2a4f7264471619eb4e522df0064289e6e92db53fb83d3d48a9ed69bc225ce54491dcf9ae8f12dbd58cd248b1253fcf3fa4479d1796187de98d05d0a54c56

    • SSDEEP

      196608:zt5BooB+Xac/OygqvMehWR//jqnlsyjgf+YE:VombygjK+/r++yj2

    • Detect Vidar Stealer

    • Stealc

      Stealc is an infostealer written in C++.

    • Vidar

      Vidar is an infostealer based on Arkei stealer.

    • Downloads MZ/PE file

    • Executes dropped EXE

    • Loads dropped DLL

    • Modifies system executable filetype association

    • Reads data files stored by FTP clients

      Tries to access configuration files associated with programs like FileZilla.

    • Reads user/profile data of local email clients

      Email clients store some user data on disk where infostealers will often target it.

    • Reads user/profile data of web browsers

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

    • Registers COM server for autorun

    • Accesses cryptocurrency files/wallets, possible credential harvesting

    • Adds Run key to start application

    • Checks installed software on the system

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

    • Checks system information in the registry

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

MITRE ATT&CK Matrix ATT&CK v13

Persistence

Event Triggered Execution

1
T1546

Change Default File Association

1
T1546.001

Boot or Logon Autostart Execution

2
T1547

Registry Run Keys / Startup Folder

2
T1547.001

Privilege Escalation

Event Triggered Execution

1
T1546

Change Default File Association

1
T1546.001

Boot or Logon Autostart Execution

2
T1547

Registry Run Keys / Startup Folder

2
T1547.001

Defense Evasion

Modify Registry

3
T1112

Credential Access

Unsecured Credentials

4
T1552

Credentials In Files

4
T1552.001

Discovery

Query Registry

5
T1012

System Information Discovery

4
T1082

Peripheral Device Discovery

1
T1120

Collection

Data from Local System

4
T1005

Tasks