Analysis
- max time kernel
142s - max time network
157s - platform
windows10-2004_x64 - resource
win10v2004-20240226-en - resource tags
- submitted
27/04/2024, 23:11
General
- Target bafe2dffe2fe76093da577a2a7763aad.exe
- Size 452KB
- Sample240427-2586msaf69
- SHA256 cea8116fefb88cd3597edd342e9c0d5a99e6ff5e434035bdbb92f64c17ea2102
Malware Config
Extracted
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stealc
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http://185.172.128.76
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url_path
/8681490a59ad0e34.php
Signatures
- SectopRAT
SectopRAT is a remote access trojan first seen in November 2019.
- SectopRAT payload 1 IoCs
- Stealc
Stealc is an infostealer written in C++.
- Downloads MZ/PE file
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 2 IoCs
- Loads dropped DLL 3 IoCs
- Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
- Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
- Suspicious use of SetThreadContext 2 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Program crash 2 IoCs
- Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
- Suspicious behavior: EnumeratesProcesses 22 IoCs
- Suspicious behavior: MapViewOfSection 3 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of SetWindowsHookEx 3 IoCs
- Suspicious use of WriteProcessMemory 15 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\bafe2dffe2fe76093da577a2a7763aad.exe"C:\Users\Admin\AppData\Local\Temp\bafe2dffe2fe76093da577a2a7763aad.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\u3xc.0.exe"C:\Users\Admin\AppData\Local\Temp\u3xc.0.exe"2⤵
- Executes dropped EXE
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4912 -s 22883⤵
- Program crash
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C:\Users\Admin\AppData\Local\Temp\u3xc.2\run.exe"C:\Users\Admin\AppData\Local\Temp\u3xc.2\run.exe"2⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exeC:\Windows\SysWOW64\cmd.exe3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exeC:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe4⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
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-
-
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 5088 -s 14282⤵
- Program crash
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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=network.mojom.NetworkService --lang=en-US --service-sandbox-type=none --no-appcompat-clear --mojo-platform-channel-handle=3476 --field-trial-handle=2328,i,5873823382323802923,13134441441264702821,262144 --variations-seed-version /prefetch:31⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 5088 -ip 50881⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 4912 -ip 49121⤵
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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=3960 --field-trial-handle=2328,i,5873823382323802923,13134441441264702821,262144 --variations-seed-version /prefetch:81⤵
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
Are.docx
mozglue.dll
nss3.dll
4cdf3573-17c9-4b20-a737-533b7852bb40.tmp
SCT Auditing Pending Reports
354e0e64
tmpE849.tmp
tmpE8E8.tmp
u3xc.0.exe
u3xc.1.zip
UIxMarketPlugin.dll
bunch.dat
relay.dll
run.exe
whale.dbf
memory/3744-212-0x00000000057A0000-0x0000000005D44000-memory.dmp
memory/3744-216-0x0000000005200000-0x000000000520A000-memory.dmp
memory/3744-238-0x0000000007820000-0x000000000782A000-memory.dmp
memory/3744-219-0x0000000005F60000-0x0000000005FC6000-memory.dmp
memory/3744-218-0x0000000005780000-0x000000000579E000-memory.dmp
memory/3744-217-0x00000000063C0000-0x00000000068EC000-memory.dmp
memory/3744-215-0x0000000005270000-0x00000000052C0000-memory.dmp
memory/3744-214-0x00000000052E0000-0x0000000005356000-memory.dmp
memory/3744-213-0x0000000005430000-0x00000000055F2000-memory.dmp
memory/3744-211-0x0000000005120000-0x00000000051B2000-memory.dmp
memory/3744-210-0x0000000000B00000-0x0000000000BC6000-memory.dmp
memory/3744-207-0x00000000732B0000-0x0000000074504000-memory.dmp
memory/4432-147-0x0000000072E40000-0x0000000072FBB000-memory.dmp
memory/4432-163-0x0000000072E40000-0x0000000072FBB000-memory.dmp
memory/4432-148-0x00007FFD07D10000-0x00007FFD07F05000-memory.dmp
memory/4912-159-0x0000000000400000-0x0000000001A18000-memory.dmp
memory/4912-204-0x0000000000400000-0x0000000001A18000-memory.dmp
memory/4912-14-0x0000000001D70000-0x0000000001E70000-memory.dmp
memory/4912-15-0x0000000001B30000-0x0000000001B57000-memory.dmp
memory/4912-16-0x0000000000400000-0x0000000001A18000-memory.dmp
memory/4912-32-0x0000000061E00000-0x0000000061EF3000-memory.dmp
memory/5064-205-0x0000000072E40000-0x0000000072FBB000-memory.dmp
memory/5064-192-0x00007FFD07D10000-0x00007FFD07F05000-memory.dmp
memory/5088-1-0x0000000001B60000-0x0000000001C60000-memory.dmp
memory/5088-157-0x0000000000400000-0x0000000001A3C000-memory.dmp
memory/5088-158-0x00000000037D0000-0x000000000383D000-memory.dmp
memory/5088-2-0x00000000037D0000-0x000000000383D000-memory.dmp
memory/5088-9-0x0000000000400000-0x0000000001A3C000-memory.dmp
memory/5088-3-0x0000000000400000-0x0000000001A3C000-memory.dmp