Resubmissions
10/04/2024, 02:55
240410-dektcsff5x1010/04/2024, 02:54
240410-dd6z7scc891010/04/2024, 02:54
240410-dd6pfacc881010/04/2024, 02:54
240410-dd53xacc871009/09/2023, 16:01
230909-tgqqdscd3z7Analysis
- max time kernel
315s - max time network
1589s - platform
windows10-1703_x64 - resource
win10-20240404-en - resource tags
- submitted
10/04/2024, 02:55
General
- Target dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236aexe_JC.exe
- Size 203KB
- Sample240410-dektcsff5x
- SHA256 dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236a
Malware Config
Signatures
- Detect Gurcu Stealer V3 payload 2 IoCs
- Detect ZGRat V1 2 IoCs
- Gurcu, WhiteSnake
Gurcu is a malware stealer written in C#.
- ZGRat
ZGRat is remote access trojan written in C#.
- Executes dropped EXE 2 IoCs
- Reads WinSCP keys stored on the system 2 TTPs
Tries to access WinSCP stored sessions.
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Accesses Microsoft Outlook profiles 1 TTPs 6 IoCs
- Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Runs ping.exe 1 TTPs 1 IoCs
- Suspicious behavior: EnumeratesProcesses 2 IoCs
- Suspicious use of AdjustPrivilegeToken 3 IoCs
- Suspicious use of WriteProcessMemory 10 IoCs
- Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236aexe_JC.exe"C:\Users\Admin\AppData\Local\Temp\dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236aexe_JC.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C chcp 65001 && ping 127.0.0.1 && schtasks /create /tn "dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236aexe_JC" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\EsetSecurity\dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236aexe_JC.exe" /rl HIGHEST /f && DEL /F /S /Q /A "C:\Users\Admin\AppData\Local\Temp\dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236aexe_JC.exe" &&START "" "C:\Users\Admin\AppData\Local\EsetSecurity\dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236aexe_JC.exe"2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\chcp.comchcp 650013⤵
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C:\Windows\system32\PING.EXEping 127.0.0.13⤵
- Runs ping.exe
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C:\Windows\system32\schtasks.exeschtasks /create /tn "dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236aexe_JC" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\EsetSecurity\dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236aexe_JC.exe" /rl HIGHEST /f3⤵
- Creates scheduled task(s)
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-
C:\Users\Admin\AppData\Local\EsetSecurity\dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236aexe_JC.exe"C:\Users\Admin\AppData\Local\EsetSecurity\dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236aexe_JC.exe"3⤵
- Executes dropped EXE
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Users\Admin\AppData\Local\EsetSecurity\dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236aexe_JC.exeC:\Users\Admin\AppData\Local\EsetSecurity\dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236aexe_JC.exe1⤵
- Executes dropped EXE
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
port.dat
dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236aexe_JC.exe
dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236aexe_JC.exe.log
installUtilLog.txt
memory/2808-20-0x0000019936D40000-0x0000019936D50000-memory.dmp
memory/2808-19-0x00007FFBE3B70000-0x00007FFBE455C000-memory.dmp
memory/2808-25-0x00007FFBE3B70000-0x00007FFBE455C000-memory.dmp
memory/2808-26-0x0000019936D40000-0x0000019936D50000-memory.dmp
memory/3308-0-0x00000260B3A30000-0x00000260B3A68000-memory.dmp
memory/3308-4-0x00000260B5710000-0x00000260B5720000-memory.dmp
memory/3308-3-0x00007FFBE3B70000-0x00007FFBE455C000-memory.dmp
memory/3308-6-0x00007FFBE3B70000-0x00007FFBE455C000-memory.dmp
memory/4264-11-0x00007FFBE3B70000-0x00007FFBE455C000-memory.dmp
memory/4264-17-0x000001835C9E0000-0x000001835C9F0000-memory.dmp
memory/4264-12-0x000001835C9E0000-0x000001835C9F0000-memory.dmp
memory/4264-16-0x00007FFBE3B70000-0x00007FFBE455C000-memory.dmp