Resubmissions

09-08-2023 01:09

230809-bh9ksage22 3

12-06-2023 15:59

230612-tfk4hsde3v 10

General

  • Target

    Telegram Desktop.exe

  • Size

    3.8MB

  • Sample

    230612-tfk4hsde3v

  • MD5

    1d156ea00258d8c5ed190ab425b6bf67

  • SHA1

    92014a052c4654a167e933702d8b12b13ca6a90d

  • SHA256

    96890d1d86aad9940fd54604ef09dd7e2dcf5cc084eeaf63a1062b4fbead91ae

  • SHA512

    1eaa1fe0a8bfab0004d6dc5b773f710aebd5027f2258e41b5cf24eb164a70eb65a2395cee7d3244898e011baee3e3fc6d83dbcfbe1048d117984fa9fc40d8a54

  • SSDEEP

    98304:iFgMEhr3Or19KXlcw1CdU2uP318hXjETV:uzGrO4n2uP3iwV

Malware Config

Targets

    • Target

      Telegram Desktop.exe

    • Size

      3.8MB

    • MD5

      1d156ea00258d8c5ed190ab425b6bf67

    • SHA1

      92014a052c4654a167e933702d8b12b13ca6a90d

    • SHA256

      96890d1d86aad9940fd54604ef09dd7e2dcf5cc084eeaf63a1062b4fbead91ae

    • SHA512

      1eaa1fe0a8bfab0004d6dc5b773f710aebd5027f2258e41b5cf24eb164a70eb65a2395cee7d3244898e011baee3e3fc6d83dbcfbe1048d117984fa9fc40d8a54

    • SSDEEP

      98304:iFgMEhr3Or19KXlcw1CdU2uP318hXjETV:uzGrO4n2uP3iwV

    • DCrat

      DarkCrystalrat.

    • DcRat

      DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.

    • Panda Stealer payload

    • PandaStealer

      Panda Stealer is a fork of CollectorProject Stealer written in C++.

    • Process spawned unexpected child process

      This typically indicates the parent process was compromised via an exploit or macro.

    • StormKitty

      StormKitty is an open source info stealer written in C#.

    • StormKitty payload

    • DCRat payload

      Detects payload of DCRat, commonly dropped by NSIS installers.

    • Downloads MZ/PE file

    • Drops file in Drivers directory

    • Modifies Installed Components in the registry

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads data files stored by FTP clients

      Tries to access configuration files associated with programs like FileZilla.

    • Reads user/profile data of web browsers

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

    • Registers COM server for autorun

    • VMProtect packed file

      Detects executables packed with VMProtect commercial packer.

    • Accesses Microsoft Outlook profiles

    • 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 whether UAC is enabled

    • Drops desktop.ini file(s)

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

    • Legitimate hosting services abused for malware hosting/C2

    • Looks up external IP address via web service

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

    • Looks up geolocation information via web service

      Uses a legitimate geolocation service to find the infected system's geolocation info.

    • Drops autorun.inf file

      Malware can abuse Windows Autorun to spread further via attached volumes.

    • Drops file in System32 directory

    • Modifies termsrv.dll

      Commonly used to allow simultaneous RDP sessions.

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Replication Through Removable Media

1
T1091

Execution

Scheduled Task

1
T1053

Persistence

Registry Run Keys / Startup Folder

3
T1060

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

Defense Evasion

Modify Registry

5
T1112

Install Root Certificate

1
T1130

Credential Access

Credentials in Files

3
T1081

Discovery

Query Registry

7
T1012

System Information Discovery

7
T1082

Peripheral Device Discovery

2
T1120

Lateral Movement

Replication Through Removable Media

1
T1091

Remote Desktop Protocol

1
T1076

Collection

Data from Local System

3
T1005

Email Collection

1
T1114

Command and Control

Web Service

1
T1102

Tasks