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
293s - max time network
306s - platform
windows10-2004_x64 - resource
win10v2004-20240226-en - resource tags
- submitted
10/04/2024, 02:54
General
- Target dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236aexe_JC.exe
- Size 203KB
- Sample240410-dd53xacc87
- 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#.
- Checks computer location settings 2 TTPs 7 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 12 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
- Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
- 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 11 IoCs
- Suspicious use of AdjustPrivilegeToken 7 IoCs
- Suspicious use of SetWindowsHookEx 1 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⤵
- Checks computer location settings
- 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⤵
- Checks computer location settings
- Executes dropped EXE
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\tar.exe"C:\Windows\System32\tar.exe" -xvzf "C:\Users\Admin\AppData\Local\Temp\tmpD69.tmp" -C "C:\Users\Admin\AppData\Local\9krryil1hy"4⤵
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C:\Users\Admin\AppData\Local\9krryil1hy\tor\tor.exe"C:\Users\Admin\AppData\Local\9krryil1hy\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\9krryil1hy\torrc.txt"4⤵
- Executes dropped EXE
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C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=1344 --field-trial-handle=2276,i,11674642242468042059,14711253743544118298,262144 --variations-seed-version /prefetch:81⤵
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C:\Users\Admin\AppData\Local\EsetSecurity\dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236aexe_JC.exeC:\Users\Admin\AppData\Local\EsetSecurity\dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236aexe_JC.exe1⤵
- Checks computer location settings
- 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:\Users\Admin\AppData\Local\9krryil1hy\tor\tor.exe"C:\Users\Admin\AppData\Local\9krryil1hy\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\9krryil1hy\torrc.txt"2⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Local\EsetSecurity\dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236aexe_JC.exeC:\Users\Admin\AppData\Local\EsetSecurity\dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236aexe_JC.exe1⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\9krryil1hy\tor\tor.exe"C:\Users\Admin\AppData\Local\9krryil1hy\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\9krryil1hy\torrc.txt"2⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Local\EsetSecurity\dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236aexe_JC.exeC:\Users\Admin\AppData\Local\EsetSecurity\dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236aexe_JC.exe1⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\9krryil1hy\tor\tor.exe"C:\Users\Admin\AppData\Local\9krryil1hy\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\9krryil1hy\torrc.txt"2⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Local\EsetSecurity\dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236aexe_JC.exeC:\Users\Admin\AppData\Local\EsetSecurity\dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236aexe_JC.exe1⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\9krryil1hy\tor\tor.exe"C:\Users\Admin\AppData\Local\9krryil1hy\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\9krryil1hy\torrc.txt"2⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Local\EsetSecurity\dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236aexe_JC.exeC:\Users\Admin\AppData\Local\EsetSecurity\dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236aexe_JC.exe1⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\9krryil1hy\tor\tor.exe"C:\Users\Admin\AppData\Local\9krryil1hy\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\9krryil1hy\torrc.txt"2⤵
- Executes dropped EXE
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
cached-microdesc-consensus
cached-microdescs.new
hostname
port.dat
tor.exe
torrc.txt
dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236aexe_JC.exe
dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236aexe_JC.exe.log
installUtilLog.txt
installUtilLog.txt
installUtilLog.txt
installUtilLog.txt
tmpD69.tmp
memory/404-131-0x00007FFA04D50000-0x00007FFA05811000-memory.dmp
memory/404-127-0x00007FFA04D50000-0x00007FFA05811000-memory.dmp
memory/1056-90-0x00007FFA04650000-0x00007FFA05111000-memory.dmp
memory/1056-50-0x00007FFA04650000-0x00007FFA05111000-memory.dmp
memory/1056-65-0x0000019B64E20000-0x0000019B64E30000-memory.dmp
memory/1056-12-0x0000019B64E20000-0x0000019B64E30000-memory.dmp
memory/1056-11-0x00007FFA04650000-0x00007FFA05111000-memory.dmp
memory/1096-83-0x00007FFA04650000-0x00007FFA05111000-memory.dmp
memory/1096-84-0x0000021DDDB30000-0x0000021DDDB40000-memory.dmp
memory/1096-89-0x00007FFA04650000-0x00007FFA05111000-memory.dmp
memory/1096-76-0x0000021DDDB30000-0x0000021DDDB40000-memory.dmp
memory/1096-75-0x00007FFA04650000-0x00007FFA05111000-memory.dmp
memory/1728-113-0x00007FFA04D50000-0x00007FFA05811000-memory.dmp
memory/1728-117-0x00007FFA04D50000-0x00007FFA05811000-memory.dmp
memory/2876-96-0x00007FFA04D50000-0x00007FFA05811000-memory.dmp
memory/2876-97-0x00000195DC700000-0x00000195DC710000-memory.dmp
memory/2876-101-0x00007FFA04D50000-0x00007FFA05811000-memory.dmp
memory/3508-111-0x00007FFA04D50000-0x00007FFA05811000-memory.dmp
memory/3508-107-0x00007FFA04D50000-0x00007FFA05811000-memory.dmp
memory/3876-6-0x00007FFA05710000-0x00007FFA061D1000-memory.dmp
memory/3876-0-0x000001F175860000-0x000001F175898000-memory.dmp
memory/3876-1-0x00007FFA05710000-0x00007FFA061D1000-memory.dmp
memory/3876-2-0x000001F177EA0000-0x000001F177EB0000-memory.dmp