Analysis
- max time kernel
151s - max time network
153s - platform
windows10-2004_x64 - resource
win10v2004-20240319-en - resource tags
- submitted
20/03/2024, 10:31
General
- Target e5b8601b3855fd1ed6d5323f65adf406.exe
- Size 315KB
- Sample240320-mkc55see78
- SHA256 45ab730f19b743bca12db47745e8cd2254df1914432acb2b3b0a079c930afee3
Malware Config
Signatures
- Stealc
Stealc is an infostealer written in C++.
- Downloads MZ/PE file
- Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 1 IoCs
- Loads dropped DLL 2 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
- Adds Run key to start application 2 TTPs 1 IoCs
- Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Program crash 1 IoCs
- Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
- Runs ping.exe 1 TTPs 1 IoCs
- Suspicious behavior: EnumeratesProcesses 64 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 12 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\e5b8601b3855fd1ed6d5323f65adf406.exe"C:\Users\Admin\AppData\Local\Temp\e5b8601b3855fd1ed6d5323f65adf406.exe"1⤵
- Checks computer location settings
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\system32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Local\Temp\FIEHDBGDHD.exe"2⤵
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\FIEHDBGDHD.exe"C:\Users\Admin\AppData\Local\Temp\FIEHDBGDHD.exe"3⤵
- Checks computer location settings
- Executes dropped EXE
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /C ping 2.2.2.2 -n 1 -w 3000 > Nul & Del C:\Users\Admin\AppData\Local\Temp\FIEHDBGDHD.exe4⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\PING.EXEping 2.2.2.2 -n 1 -w 30005⤵
- Runs ping.exe
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3928 -s 24962⤵
- 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=3328 --field-trial-handle=2808,i,4621512294509789388,1545966267740426092,262144 --variations-seed-version /prefetch:31⤵
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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=3948 --field-trial-handle=2808,i,4621512294509789388,1545966267740426092,262144 --variations-seed-version /prefetch:81⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 3928 -ip 39281⤵
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
Are.docx
mozglue.dll
nss3.dll
SCT Auditing Pending Reports
Sdch Dictionaries
FIEHDBGDHD.exe
memory/3928-2-0x0000000002FF0000-0x0000000003017000-memory.dmp
memory/3928-1-0x0000000003060000-0x0000000003160000-memory.dmp
memory/3928-61-0x0000000003060000-0x0000000003160000-memory.dmp
memory/3928-4-0x0000000061E00000-0x0000000061EF3000-memory.dmp
memory/3928-3-0x0000000000400000-0x0000000002D4D000-memory.dmp
memory/3928-90-0x0000000000400000-0x0000000002D4D000-memory.dmp
memory/3928-37-0x0000000000400000-0x0000000002D4D000-memory.dmp
memory/3928-96-0x0000000000400000-0x0000000002D4D000-memory.dmp
memory/3928-59-0x0000000000400000-0x0000000002D4D000-memory.dmp
memory/3928-103-0x0000000000400000-0x0000000002D4D000-memory.dmp
memory/3928-124-0x0000000000400000-0x0000000002D4D000-memory.dmp
memory/4932-120-0x0000000000770000-0x000000000078E000-memory.dmp
memory/4932-122-0x0000000005070000-0x0000000005080000-memory.dmp
memory/4932-121-0x0000000072310000-0x0000000072AC0000-memory.dmp
memory/4932-125-0x0000000072310000-0x0000000072AC0000-memory.dmp
memory/4932-126-0x0000000005070000-0x0000000005080000-memory.dmp