MBCProject-mbc-markdown/xample-malware/kovter.md

ID	X0009
Aliases	None
Platforms	Windows
Year	2016
Associated ATT&CK Software	None

Kovter

A trojan that performs click-fraud.

ATT&CK Techniques

Name	Use
Initial Access::Phishing::Spearphishing Attachment (T1566.001)	The malware is sent out to victims via an attachment. [2]
Execution::User Execution::Malicious File (T1204.002)	The malware relies on a victim to execute itself. [2]
Defense Evasion::System Binary Proxy Execution::Mshta (T1218.005)	The malware uses mshta.exe to run Javascript. [1]
Defense Evasion::File and Directory Permissions Modification (T1222)	Kovter sets file attributes. [3]
Discovery::Application Window Discovery (T1010)	Kovter finds graphical windows. [3]
Discovery::System Location Discovery (T1614)	Kovter gets geographical locations. [3]
Execution::Shared Modules (T1129)	Kovter gets ntdll base address. [3]
Execution::System Services::Service Execution (T1569.002)	Kovter interacts with drivers via control codes. [3]

Enhanced ATT&CK Techniques

Name	Use
Impact::Generate Traffic from Victim (E1643)	Kovter performs click-fraud. [1]
Persistence::Registry Run Keys / Startup Folder (F0012)	The malware writes an autorun registry entry. [2]
Execution::Command and Scripting Interpreter (E1059)	The malware executes malicious javascript and powershell. [1]
Defense Evasion::Modify Registry (E1112)	The malware modifies the registry during execution. [2]
Defense Evasion::Obfuscated Files or Information (E1027)	The malware will use a key to decrypt text from a URL to create additional malicious code. [1]
Anti-Static Analysis::Software Packing (F0001)	The malware comes packed by a crypter/FUD. [1]
Collection::Keylogging::Polling (F0002.002)	Kovter logs keystrokes via polling. [3]
Collection::Screen Capture::WinAPI (E1113.m01)	Kovter captures screenshots. [3]
Discovery::Application Window Discovery::Window Text (E1010.m01)	Kovter gets graphical window texts. [3]
Discovery::File and Directory Discovery::Log File (E1083.m01)	Kovter accesses Windows event logs. [3]
Discovery::File and Directory Discovery (E1083)	Kovter gets file version info. [3]
Discovery::System Information Discovery (E1082)	Kovter gets disk information. [3]

MBC Behaviors

Name	Use
Defense Evasion::Alternative Installation Location::Registry Install (B0027.002)	Kovter stores malware files in the Registry instead of on the hard drive. [2]
Command And Control::C2 Communication::Send Data (B0030.001)	Kovter sends data. [3]
Command And Control::C2 Communication::Receive Data (B0030.002)	Kovter receives data. [3]
Communication::HTTP Communication::Connect to Server (C0002.009)	Kovter connects to a HTTP server. [3]
Communication::HTTP Communication::Create Request (C0002.012)	Kovter creates HTTP requests. [3]
Cryptography::Cryptographic Hash (C0029)	Kovter hashes data via WinCrypt. [3]
Cryptography::Decrypt Data (C0031)	Kovter encrypts or decrypts via WinCrypt. [3]
Cryptography::Encryption Key (C0028)	Kovter creates new keys via CryptAcquireContext. [3]
File System::Copy File (C0045)	Kovter copies files. [3]
File System::Create Directory (C0046)	Kovter creates directories. [3]
File System::Delete Directory (C0048)	Kovter deletes directories. [3]
File System::Delete File (C0047)	Kovter deletes files. [3]
File System::Move File (C0063)	Kovter moves files. [3]
File System::Read File (C0051)	Kovter reads files on Windows. [3]
File System::Set File Attributes (C0050)	Kovter sets file attributes. [3]
Operating System::Environment Variable::Set Variable (C0034.001)	Kovter sets environment variables. [3]
Operating System::Registry::Create Registry Key (C0036.004)	Kovter creates or opens registry keys. [3]
Operating System::Registry::Query Registry Value (C0036.006)	Kovter queries or enumerates registry values. [3]
Process::Allocate Thread Local Storage (C0040)	Kovter allocates thread local storage. [3]
Process::Create Mutex (C0042)	Kovter creates mutexes. [3]
Process::Create Process (C0017)	Kovter creates processes on Windows. [3]
Process::Set Thread Local Storage Value (C0041)	Kovter sets thread local storage values. [3]
Process::Terminate Process (C0018)	Kovter terminates processes. [3]

Indicators of Compromise

SHA256 Hashes

• 15c237f6b74af2588b07912bf18e2734594251787871c9638104e4bf5de46589
• bffe7ccbcf69e7c787ff10d1dc7dbf6044bffcb13b95d851f4a735917b3a6fdf
• 40050153dceec2c8fbb1912f8eeabe449d1e265f0c8198008be8b34e5403e731

References

[1] https://blog.malwarebytes.com/threat-analysis/2016/07/untangling-kovter/

[2] https://labs.vipre.com/analysis-of-kovter-a-very-clever-piece-of-malware/#:~:text=Kovter%20copies%20the%20fileless%20persistence,written%20on%20to%20the%20filesystem.

[3] capa v4.0, analyzed at MITRE on 10/12/2022