Analysis
- max time kernel
121s - max time network
123s - platform
windows10_x64 - resource
win10-en-20211014 - submitted
18/11/2021, 09:33
General
- Target 742b8e5b9cc80ad26404367ab378b7a8.exe
- Size 293KB
- Sample211118-lh7fjafcd3
- SHA256 2d162f57aec42d53839923f8f3f98cb381bd9f406b57475d9cd9716d24ab6fcd
Score
10/10
Malware Config
Signatures
- Arkei
Arkei is an infostealer written in C++.
- Arkei Stealer Payload 2 IoCs
- Downloads MZ/PE file
- Loads dropped DLL 3 IoCs
- 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.
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
- Delays execution with timeout.exe 1 IoCs
- Suspicious use of WriteProcessMemory 6 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\742b8e5b9cc80ad26404367ab378b7a8.exe"C:\Users\Admin\AppData\Local\Temp\742b8e5b9cc80ad26404367ab378b7a8.exe"1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\742b8e5b9cc80ad26404367ab378b7a8.exe" & exit2⤵
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\timeout.exetimeout /t 53⤵
- Delays execution with timeout.exe
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
memory/2896-115-0x00000000021A9000-0x00000000021BD000-memory.dmp
memory/2896-116-0x0000000002140000-0x0000000002161000-memory.dmp
memory/2896-117-0x0000000000400000-0x0000000001FCF000-memory.dmp