Openhunting Threat Library

STASHLOG

STASHLOG
(Type: Loader)

(Cybereason) STASHLOG (shiver.exe / forsrv.exe) is a 32 bit executable that is being used to prepare the victim machine for further compromise, and to “stash” a malicious, encrypted payload to a CLFS log file. This payload will be decrypted at each phase to deliver the next phase in the infection.

[News Analysis] Trends:

Total Trend: 4

Trend Per Year
2
2021
2
2022


Trend Per Month
2
Sep 2021
2
May 2022



[News Analysis] News Mention Another Threat Name:

3 - PRIVATELOG3 - Spyder3 - STASHLOG3 - Winnti


[TTP Analysis] Technique Performance:



[TTP Analysis] Mitre Attack Matrix:

TA0043 TA0042 TA0001 TA0002 TA0003 TA0004 TA0005 TA0006 TA0007 TA0008 TA0009 TA0011 TA0010 TA0040
Reconnaissance Resource Development Initial Access Execution Persistence Privilege Escalation Defense Evasion Credential Access Discovery Lateral Movement Collection Command and Control Exfiltration Impact


[Infrastructure Analysis] Based on Related IOC:

IP:Port Timestamp
Domain Timestamp
URL Timestamp


[Target Analysis] Region/Sector:

No information


References:

News Basic Information Indicator of Compromise Mitre Attack

News Article (Credit @Malpedia)

Basic Information (Credit @etda.or.th)

Tool: STASHLOG

Names: STASHLOG

Description: (Cybereason) STASHLOG (shiver.exe / forsrv.exe) is a 32 bit executable that is being used to prepare the victim machine for further compromise, and to “stash” a malicious, encrypted payload to a CLFS log file. This payload will be decrypted at each phase to deliver the next phase in the infection.

Category: Malware

Type: Loader

Information: https://www.cybereason.com/blog/operation-cuckoobees-a-winnti-malware-arsenal-deep-dive

Information: https://www.mandiant.com/resources/unknown-actor-using-clfs-log-files-for-stealth

Malpedia: https://malpedia.caad.fkie.fraunhofer.de/details/win.stashlog

Last-card-change: 2022-12-27

Source: https://apt.etda.or.th/cgi-bin/listtools.cgi

TA0043 TA0042 TA0001 TA0002 TA0003 TA0004 TA0005 TA0006 TA0007 TA0008 TA0009 TA0011 TA0010 TA0040
Reconnaissance Resource Development Initial Access Execution Persistence Privilege Escalation Defense Evasion Credential Access Discovery Lateral Movement Collection Command and Control Exfiltration Impact