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07/09/2021, 17:26

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04/09/2021, 21:32

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04/09/2021, 21:19

210904-z56z6shfck 10

General

  • Target

    setup_x86_x64_install.exe

  • Size

    2.2MB

  • Sample

    210904-z56z6shfck

  • MD5

    e3b3a95ef03de0de77cca7a54ea22c94

  • SHA1

    d318d234f8f27f25de660d9881113df9d11c24ff

  • SHA256

    baa381f572d293636b6e48cacd2cd6a6f4f9e5f71c583873260f6ac01f0f5e15

  • SHA512

    3c1c6254f14491bc2cb096d8b46d0d65e096dac331bab2df9c5b173271eef1b9a9deb831f212a0117fab16665277208d0c1b5183ea600cc2bbe6f9049c57ad0d

Malware Config

Extracted

Path

C:\_readme.txt

Family

djvu

Ransom Note
ATTENTION! Don't worry, you can return all your files! All your files like pictures, databases, documents and other important are encrypted with strongest encryption and unique key. The only method of recovering files is to purchase decrypt tool and unique key for you. This software will decrypt all your encrypted files. What guarantees you have? You can send one of your encrypted file from your PC and we decrypt it for free. But we can decrypt only 1 file for free. File must not contain valuable information. You can get and look video overview decrypt tool: https://we.tl/t-vsuuyeLSKk Price of private key and decrypt software is $980. Discount 50% available if you contact us first 72 hours, that's price for you is $490. Please note that you'll never restore your data without payment. Check your e-mail "Spam" or "Junk" folder if you don't get answer more than 6 hours. To get this software you need write on our e-mail: [email protected] Reserve e-mail address to contact us: [email protected] Your personal ID: 0332gDrgofRiXRqq62TeogIfmpihYZJ6wDmuUVD07WwczX6Bm
URLs

https://we.tl/t-vsuuyeLSKk

Extracted

Family

smokeloader

Version

2020

C2

http://varmisende.com/upload/

http://fernandomayol.com/upload/

http://nextlytm.com/upload/

http://people4jan.com/upload/

http://asfaltwerk.com/upload/

rc4.i32
rc4.i32

Extracted

Family

vidar

Version

40.4

Botnet

517

C2

https://romkaxarit.tumblr.com/

Attributes
  • profile_id

    517

Extracted

Family

vidar

Version

40.4

Botnet

706

C2

https://romkaxarit.tumblr.com/

Attributes
  • profile_id

    706

Extracted

Path

C:\_readme.txt

Family

djvu

Ransom Note
ATTENTION! Don't worry, you can return all your files! All your files like pictures, databases, documents and other important are encrypted with strongest encryption and unique key. The only method of recovering files is to purchase decrypt tool and unique key for you. This software will decrypt all your encrypted files. What guarantees you have? You can send one of your encrypted file from your PC and we decrypt it for free. But we can decrypt only 1 file for free. File must not contain valuable information. You can get and look video overview decrypt tool: https://we.tl/t-vsuuyeLSKk Price of private key and decrypt software is $980. Discount 50% available if you contact us first 72 hours, that's price for you is $490. Please note that you'll never restore your data without payment. Check your e-mail "Spam" or "Junk" folder if you don't get answer more than 6 hours. To get this software you need write on our e-mail: [email protected] Reserve e-mail address to contact us: [email protected] Your personal ID: 0332gDrgoC4j04vLx6lqyFlyzpTC55w9igCGDgaBYLhUjv3Rr
URLs

https://we.tl/t-vsuuyeLSKk

Extracted

Language
ps1
Deobfuscated
URLs
ps1.dropper

http://shellloader.com/welcome

Targets

    • Target

      setup_x86_x64_install.exe

    • Size

      2.2MB

    • MD5

      e3b3a95ef03de0de77cca7a54ea22c94

    • SHA1

      d318d234f8f27f25de660d9881113df9d11c24ff

    • SHA256

      baa381f572d293636b6e48cacd2cd6a6f4f9e5f71c583873260f6ac01f0f5e15

    • SHA512

      3c1c6254f14491bc2cb096d8b46d0d65e096dac331bab2df9c5b173271eef1b9a9deb831f212a0117fab16665277208d0c1b5183ea600cc2bbe6f9049c57ad0d

    • Detected Djvu ransomeware

    • Djvu Ransomware

      Ransomware which is a variant of the STOP family.

    • Process spawned unexpected child process

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

    • RedLine

      RedLine Stealer is a malware family written in C#, first appearing in early 2020.

    • RedLine Payload

    • SmokeLoader

      Modular backdoor trojan in use since 2014.

    • Suspicious use of NtCreateProcessExOtherParentProcess

    • Vidar

      Vidar is an infostealer based on Arkei stealer.

    • suricata: ET MALWARE Amadey CnC Check-In

      suricata: ET MALWARE Amadey CnC Check-In

    • suricata: ET MALWARE JS/Nemucod requesting EXE payload 2016-02-01

      suricata: ET MALWARE JS/Nemucod requesting EXE payload 2016-02-01

    • suricata: ET MALWARE JS/Nemucod.M.gen downloading EXE payload

      suricata: ET MALWARE JS/Nemucod.M.gen downloading EXE payload

    • suricata: ET MALWARE Observed Win32/Ymacco.AA36 User-Agent

      suricata: ET MALWARE Observed Win32/Ymacco.AA36 User-Agent

    • suricata: ET MALWARE Potential Dridex.Maldoc Minimal Executable Request

      suricata: ET MALWARE Potential Dridex.Maldoc Minimal Executable Request

    • suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)

      suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)

    • suricata: ET MALWARE Vidar/Arkei Stealer Client Data Upload

      suricata: ET MALWARE Vidar/Arkei Stealer Client Data Upload

    • suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil

      suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil

    • suricata: ET MALWARE Win32/Adware.Agent.NSU CnC Activity

      suricata: ET MALWARE Win32/Adware.Agent.NSU CnC Activity

    • suricata: ET MALWARE Win32/Adware.Agent.NSU CnC Activity M2

      suricata: ET MALWARE Win32/Adware.Agent.NSU CnC Activity M2

    • suricata: ET MALWARE Win32/Tnega Activity (GET)

      suricata: ET MALWARE Win32/Tnega Activity (GET)

    • xmrig

      XMRig is a high performance, open source, cross platform CPU/GPU miner.

    • Checks for common network interception software

      Looks in the registry for tools like Wireshark or Fiddler commonly used to analyze network activity.

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

    • Vidar Stealer

    • XMRig Miner Payload

    • ASPack v2.12-2.42

      Detects executables packed with ASPack v2.12-2.42

    • Blocklisted process makes network request

    • Downloads MZ/PE file

    • Drops file in Drivers directory

    • Executes dropped EXE

    • Modifies extensions of user files

      Ransomware generally changes the extension on encrypted files.

    • 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.

    • Drops startup file

    • Loads dropped DLL

    • Modifies file permissions

    • 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.

    • Accesses 2FA software files, possible credential harvesting

    • 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 Enterprise v6

Tasks

static1

Score
N/A

behavioral1

djvuredlinesmokeloadervidarxmrig517aspackv2backdoordiscoveryevasioninfostealerminerpersistenceransomwarespywarestealersuricatathemidatrojan
Score
10/10

behavioral2

djvusmokeloadervidarxmrig706aspackv2backdoordiscoveryevasionminerpersistenceransomwarespywarestealersuricatathemidatrojan
Score
10/10

behavioral3

djvuredlinesmokeloadervidarxmrig706aspackv2backdoordiscoveryinfostealerminerransomwarestealersuricatatrojan
Score
10/10

behavioral4

djvuredlinesmokeloadervidarxmrig706aspackv2backdoordiscoveryevasioninfostealerminerpersistenceransomwarespywarestealersuricatathemidatrojan
Score
10/10

behavioral5

redlinevidarxmrigaspackv2discoveryevasioninfostealerminerpersistencespywarestealersuricatatrojan
Score
10/10

behavioral6

djvuredlinesmokeloadervidar706aspackv2backdoordiscoveryevasioninfostealerpersistenceransomwarespywarestealersuricatathemidatrojan
Score
10/10

behavioral7

Score
1/10

behavioral8

redlinesmokeloadervidar706aspackv2backdoorinfostealerstealersuricatatrojan
Score
10/10

behavioral9

redlinesmokeloadervidar706aspackv2backdoordiscoveryevasioninfostealerpersistencespywarestealersuricatatrojan
Score
10/10

behavioral10

djvuredlinesmokeloadervidar706aspackv2backdoordiscoveryevasioninfostealerpersistenceransomwarespywarestealersuricatatrojan
Score
10/10