General

  • Target

    b2ff7d2e385c7ac6ccb07485b1e2c1db42e4672cb186fadb2596d95a1cfe6a42

  • Size

    1.9MB

  • Sample

    240527-r52rfsha96

  • MD5

    aa8c50c68cb7f01937158c78d000ec2b

  • SHA1

    0123a0ec4a70fe18757d8283971f508f757c0c75

  • SHA256

    b2ff7d2e385c7ac6ccb07485b1e2c1db42e4672cb186fadb2596d95a1cfe6a42

  • SHA512

    575f982d5dea77dd2187d8bac55cdc2cec674cbaca813e0fb8c1f5119aae8a6155baa425679423358c8b101b94b308a1ead100743854d8808298b304c9067664

  • SSDEEP

    49152:CdKfTn6vOJtTF+TxMoxc1TU+j+dAzGwlrh:CdKfTnNtIuoITsdZ

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

https://steamcommunity.com/profiles/76561199689717899

https://t.me/copterwin

Attributes
  • user_agent

    Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:128.0) Gecko/20100101 Firefox/128.0

Targets

    • Target

      b2ff7d2e385c7ac6ccb07485b1e2c1db42e4672cb186fadb2596d95a1cfe6a42

    • Size

      1.9MB

    • MD5

      aa8c50c68cb7f01937158c78d000ec2b

    • SHA1

      0123a0ec4a70fe18757d8283971f508f757c0c75

    • SHA256

      b2ff7d2e385c7ac6ccb07485b1e2c1db42e4672cb186fadb2596d95a1cfe6a42

    • SHA512

      575f982d5dea77dd2187d8bac55cdc2cec674cbaca813e0fb8c1f5119aae8a6155baa425679423358c8b101b94b308a1ead100743854d8808298b304c9067664

    • SSDEEP

      49152:CdKfTn6vOJtTF+TxMoxc1TU+j+dAzGwlrh:CdKfTnNtIuoITsdZ

    • 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

    • Reads user/profile data of web browsers

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

    • Checks installed software on the system

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

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v13

Credential Access

Unsecured Credentials

1
T1552

Credentials In Files

1
T1552.001

Discovery

Query Registry

2
T1012

System Information Discovery

1
T1082

Collection

Data from Local System

1
T1005

Tasks