General

  • Target

    HEUR-Trojan.Win32.Crypt.gen-e026bc9a0b7ac31a8.exe

  • Size

    2MB

  • Sample

    230125-evta4seh35

  • MD5

    f2aa0a939eb31b64e7f57c97dce7298a

  • SHA1

    c0eefb77a322c4fcdd066779e45af74d5470eebf

  • SHA256

    e026bc9a0b7ac31a86cdbbd88e2b2be5236ba81b469723007c8b3c1d9461198f

  • SHA512

    7c7cd359b4d42be3607acc2188e0bd77964ec5324ccac8fc570be0c6024b54ff61ad514bdd767549f16a5aef7b11950235313c715720a1b0cd0d89f8ad1a5dee

  • SSDEEP

    49152:Eg/2ozbzXnm3jHSdJWSa+J9dmcQC+/qq+7aqf9fvgS+7HYv1/omI:Jl/3C0Wf+JqcQ7yB7aqZgS+Lyk

Malware Config

Extracted

Family

nullmixer

C2

http://sokiran.xyz/

Extracted

Family

vidar

Version

39.7

Botnet

933

C2

https://shpak125.tumblr.com/

Attributes
  • profile_id

    933

Targets

    • Target

      HEUR-Trojan.Win32.Crypt.gen-e026bc9a0b7ac31a8.exe

    • Size

      2MB

    • MD5

      f2aa0a939eb31b64e7f57c97dce7298a

    • SHA1

      c0eefb77a322c4fcdd066779e45af74d5470eebf

    • SHA256

      e026bc9a0b7ac31a86cdbbd88e2b2be5236ba81b469723007c8b3c1d9461198f

    • SHA512

      7c7cd359b4d42be3607acc2188e0bd77964ec5324ccac8fc570be0c6024b54ff61ad514bdd767549f16a5aef7b11950235313c715720a1b0cd0d89f8ad1a5dee

    • SSDEEP

      49152:Eg/2ozbzXnm3jHSdJWSa+J9dmcQC+/qq+7aqf9fvgS+7HYv1/omI:Jl/3C0Wf+JqcQ7yB7aqZgS+Lyk

    • Detects Smokeloader packer

    • Modifies Windows Defender Real-time Protection settings

    • NullMixer

      NullMixer is a malware dropper leading to an infection chain of a wide variety of malware families.

    • PrivateLoader

      PrivateLoader is a downloader sold as a pay-per-install malware distribution service.

    • Process spawned unexpected child process

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

    • SmokeLoader

      Modular backdoor trojan in use since 2014.

    • Suspicious use of NtCreateUserProcessOtherParentProcess

    • Vidar

      Vidar is an infostealer based on Arkei stealer.

    • Vidar Stealer

    • ASPack v2.12-2.42

      Detects executables packed with ASPack v2.12-2.42

    • Executes dropped EXE

    • Checks computer location settings

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

    • Loads dropped DLL

    • Reads user/profile data of web browsers

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

    • Unexpected DNS network traffic destination

      Network traffic to other servers than the configured DNS servers was detected on the DNS port.

    • 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.

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Modify Existing Service

1
T1031

Defense Evasion

Modify Registry

2
T1112

Disabling Security Tools

1
T1089

Install Root Certificate

1
T1130

Credential Access

Credentials in Files

1
T1081

Discovery

Query Registry

3
T1012

System Information Discovery

4
T1082

Peripheral Device Discovery

1
T1120

Collection

Data from Local System

1
T1005

Command and Control

Web Service

1
T1102

Tasks