Resubmissions

17-10-2022 19:36

221017-ybkpeacgf7 10

17-10-2022 17:27

221017-v1ye1scfdl 8

17-10-2022 14:10

221017-rg6qhacbgq 8

General

  • Target

    Yandex.exe

  • Size

    2.4MB

  • Sample

    221017-ybkpeacgf7

  • MD5

    09bb3df23630c9111a5860cb96bde6ad

  • SHA1

    217d78e392e7ef295596862175eb353977a85738

  • SHA256

    e36891d982acaa5b12e27cf55fae3581e29dd0ef35d0dd98ae93296034b5177e

  • SHA512

    8a216eac67b5d4bc54781a166cd48ab8a68e0b983fb346c14030eca060046fe7484f76fa4eb006164c5781684cad82f7d29afaf9514e70c81feffe70df402f31

  • SSDEEP

    49152:CsEpJsMKSCZrcPEGuW9Q+iA5H5u8QeuL:CsEpuBZrcPEGuWMxt

Malware Config

Extracted

Family

nymaim

C2

45.15.156.54

85.31.46.167

Targets

    • Target

      Yandex.exe

    • Size

      2.4MB

    • MD5

      09bb3df23630c9111a5860cb96bde6ad

    • SHA1

      217d78e392e7ef295596862175eb353977a85738

    • SHA256

      e36891d982acaa5b12e27cf55fae3581e29dd0ef35d0dd98ae93296034b5177e

    • SHA512

      8a216eac67b5d4bc54781a166cd48ab8a68e0b983fb346c14030eca060046fe7484f76fa4eb006164c5781684cad82f7d29afaf9514e70c81feffe70df402f31

    • SSDEEP

      49152:CsEpJsMKSCZrcPEGuW9Q+iA5H5u8QeuL:CsEpuBZrcPEGuWMxt

    • Azorult

      An information stealer that was first discovered in 2016, targeting browsing history and passwords.

    • NyMaim

      NyMaim is a malware with various capabilities written in C++ and first seen in 2013.

    • Process spawned unexpected child process

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

    • Socelars

      Socelars is an infostealer targeting browser cookies and credit card credentials.

    • evasion

      evasion.

    • Identifies VirtualBox via ACPI registry values (likely anti-VM)

    • Downloads MZ/PE file

    • Executes dropped EXE

    • Checks BIOS information in registry

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

    • Checks computer location settings

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

    • Loads dropped DLL

    • Reads data files stored by FTP clients

      Tries to access configuration files associated with programs like FileZilla.

    • Reads local data of messenger clients

      Infostealers often target stored data of messaging applications, which can include saved credentials and account information.

    • 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.

    • Themida packer

      Detects Themida, an advanced Windows software protection system.

    • Unexpected DNS network traffic destination

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

    • 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

    • 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.

    • Drops file in System32 directory

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scheduled Task

1
T1053

Persistence

Registry Run Keys / Startup Folder

1
T1060

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

Defense Evasion

Virtualization/Sandbox Evasion

1
T1497

Modify Registry

3
T1112

Install Root Certificate

1
T1130

Credential Access

Credentials in Files

5
T1081

Discovery

Query Registry

7
T1012

Virtualization/Sandbox Evasion

1
T1497

System Information Discovery

7
T1082

Peripheral Device Discovery

1
T1120

Collection

Data from Local System

5
T1005

Email Collection

1
T1114

Command and Control

Web Service

1
T1102

Tasks