General

  • Target

    btweb_installer.exe

  • Size

    1.7MB

  • Sample

    240616-1ygx5szfke

  • MD5

    ee85d32e27209474ff43715c3da7cb5e

  • SHA1

    e71e4610ca3e6ef8a87555d37bc4cb8bd58621ed

  • SHA256

    ef008cd2be7aa59382fbaa9c743aaa83713938ff16316f9ed117d66cbd98abe5

  • SHA512

    08f21c86ed33dcf10a81da064846ba72ccb95a97965618ab132e13b4e876e64c0e2313bc3ec200a77dd62269c80a981d16ada20f57465b5f51c7b34701a7e8d6

  • SSDEEP

    24576:Z7FUDowAyrTVE3U5FXGO+E5vHwbjhV/dbAo4CczGf3TAnPq0vfdyT:ZBuZrEU6E9HIHdbYC/f3cPdXk

Malware Config

Targets

    • Target

      btweb_installer.exe

    • Size

      1.7MB

    • MD5

      ee85d32e27209474ff43715c3da7cb5e

    • SHA1

      e71e4610ca3e6ef8a87555d37bc4cb8bd58621ed

    • SHA256

      ef008cd2be7aa59382fbaa9c743aaa83713938ff16316f9ed117d66cbd98abe5

    • SHA512

      08f21c86ed33dcf10a81da064846ba72ccb95a97965618ab132e13b4e876e64c0e2313bc3ec200a77dd62269c80a981d16ada20f57465b5f51c7b34701a7e8d6

    • SSDEEP

      24576:Z7FUDowAyrTVE3U5FXGO+E5vHwbjhV/dbAo4CczGf3TAnPq0vfdyT:ZBuZrEU6E9HIHdbYC/f3cPdXk

    • Cobalt Strike reflective loader

      Detects the reflective loader used by Cobalt Strike.

    • Cobaltstrike

      Detected malicious payload which is part of Cobaltstrike.

    • Drops file in Drivers directory

    • Checks BIOS information in registry

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

    • Reads user/profile data of web browsers

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

    • Adds Run key to start application

    • Checks for any installed AV software in registry

    • Downloads MZ/PE file

    • Enumerates connected drives

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

    • Modifies powershell logging option

    • AutoIT Executable

      AutoIT scripts compiled to PE executables.

    • Checks computer location settings

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

    • Drops file in System32 directory

MITRE ATT&CK Matrix ATT&CK v13

Persistence

Boot or Logon Autostart Execution

2
T1547

Registry Run Keys / Startup Folder

2
T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

2
T1547

Registry Run Keys / Startup Folder

2
T1547.001

Defense Evasion

Modify Registry

4
T1112

Subvert Trust Controls

1
T1553

Install Root Certificate

1
T1553.004

Credential Access

Unsecured Credentials

1
T1552

Credentials In Files

1
T1552.001

Discovery

Query Registry

9
T1012

System Information Discovery

8
T1082

Software Discovery

1
T1518

Security Software Discovery

1
T1518.001

Peripheral Device Discovery

2
T1120

Collection

Data from Local System

1
T1005

Tasks