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
1566s - max time network
1570s - platform
windows7_x64 - resource
win7-20240221-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 5 IoCs
- Detect ZGRat V1 5 IoCs
- Gurcu, WhiteSnake
Gurcu is a malware stealer written in C#.
- ZGRat
ZGRat is remote access trojan written in C#.
- Deletes itself 1 IoCs
- 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.
- Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Modifies system certificate store 2 TTPs 6 IoCs
- Runs ping.exe 1 TTPs 1 IoCs
- Suspicious behavior: EnumeratesProcesses 2 IoCs
- Suspicious use of AdjustPrivilegeToken 3 IoCs
- Suspicious use of WriteProcessMemory 24 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
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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⤵
- Deletes itself
- 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
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\WerFault.exeC:\Windows\system32\WerFault.exe -u -p 2564 -s 31204⤵
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C:\Windows\system32\taskeng.exetaskeng.exe {53664CBE-A13D-490B-8DC5-5F6486DF4DF2} S-1-5-21-1658372521-4246568289-2509113762-1000:PIRBKNPS\Admin:Interactive:[1]1⤵
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\EsetSecurity\dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236aexe_JC.exeC:\Users\Admin\AppData\Local\EsetSecurity\dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236aexe_JC.exe2⤵
- Executes dropped EXE
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- outlook_office_path
- outlook_win_path
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C:\Windows\system32\WerFault.exeC:\Windows\system32\WerFault.exe -u -p 2152 -s 30803⤵
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
94308059B57B3142E455B38A6EB92015
94308059B57B3142E455B38A6EB92015
94308059B57B3142E455B38A6EB92015
port.dat
dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236aexe_JC.exe
Cab6480.tmp
Tar669A.tmp
installUtilLog.txt
memory/1552-5-0x000007FEF5E50000-0x000007FEF683C000-memory.dmp
memory/1552-0-0x00000000010B0000-0x00000000010E8000-memory.dmp
memory/1552-2-0x000000001B3D0000-0x000000001B450000-memory.dmp
memory/1552-1-0x000007FEF5E50000-0x000007FEF683C000-memory.dmp
memory/2152-108-0x000007FEF5460000-0x000007FEF5E4C000-memory.dmp
memory/2152-82-0x000007FEF5460000-0x000007FEF5E4C000-memory.dmp
memory/2152-84-0x0000000000340000-0x00000000003C0000-memory.dmp
memory/2564-10-0x000007FEF5460000-0x000007FEF5E4C000-memory.dmp
memory/2564-86-0x000000001B430000-0x000000001B4B0000-memory.dmp
memory/2564-85-0x000007FEF5460000-0x000007FEF5E4C000-memory.dmp
memory/2564-11-0x000000001B430000-0x000000001B4B0000-memory.dmp
memory/2564-9-0x0000000000EE0000-0x0000000000F18000-memory.dmp