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TSCookie

TSCookie is a remote access tool (RAT) that has been used by BlackTech in campaigns against Japanese targets.[1][2]. TSCookie has been referred to as PLEAD though more recent reporting indicates a separation between the two.[3][2]

ID: S0436
ⓘ
Type: MALWARE
ⓘ
Platforms: Windows
Contributors: Tatsuya Daitoku, Cyber Defense Institute, Inc.
Version: 1.0
Created: 06 May 2020
Last Modified: 15 April 2022
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Enterprise Layer
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Techniques Used

Domain ID Name Use
Enterprise T1071 .001 Application Layer Protocol: Web Protocols

TSCookie can multiple protocols including HTTP and HTTPS in communication with command and control (C2) servers.[2][1]
Enterprise T1059 .003 Command and Scripting Interpreter: Windows Command Shell

TSCookie has the ability to execute shell commands on the infected host.[1]
Enterprise T1555 .003 Credentials from Password Stores: Credentials from Web Browsers

TSCookie has the ability to steal saved passwords from the Internet Explorer, Edge, Firefox, and Chrome browsers.[1]
Enterprise T1140 Deobfuscate/Decode Files or Information

TSCookie has the ability to decrypt, load, and execute a DLL and its resources.[1]
Enterprise T1573 .001 Encrypted Channel: Symmetric Cryptography

TSCookie has encrypted network communications with RC4.[1]
Enterprise T1083 File and Directory Discovery

TSCookie has the ability to discover drive information on the infected host.[1]
Enterprise T1105 Ingress Tool Transfer

TSCookie has the ability to upload and download files to and from the infected host.[1]
Enterprise T1095 Non-Application Layer Protocol

TSCookie can use ICMP to receive information on the destination server.[2]
Enterprise T1057 Process Discovery

TSCookie has the ability to list processes on the infected host.[1]
Enterprise T1055 Process Injection

TSCookie has the ability to inject code into the svchost.exe, iexplorer.exe, explorer.exe, and default browser processes.[2]
Enterprise T1090 Proxy

TSCookie has the ability to proxy communications with command and control (C2) servers.[2]
Enterprise T1016 System Network Configuration Discovery

TSCookie has the ability to identify the IP of the infected host.[1]
Enterprise T1204 .001 User Execution: Malicious Link

TSCookie has been executed via malicious links embedded in e-mails spoofing the Ministries of Education, Culture, Sports, Science and Technology of Japan.[1]

Groups That Use This Software

ID Name References
G0098 BlackTech

[1]

References

  1. Tomonaga, S. (2018, March 6). Malware “TSCookie”. Retrieved May 6, 2020.
  2. Tomonaga, S.. (2019, September 18). Malware Used by BlackTech after Network Intrusion. Retrieved May 6, 2020.
  1. Tomonaga, S. (2018, June 8). PLEAD Downloader Used by BlackTech. Retrieved May 6, 2020.