Analysis
- max time kernel
150s - max time network
140s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
- submitted
28/09/2022, 04:38
General
- Target file.exe
- Size 326KB
- Sample220928-e9c8fagbfk
- SHA256 fe19654aeda82b07e10241fba3ede4eb8b16e70caa3abd2f5f4757baa84f1ccc
Malware Config
Signatures
- Detects Smokeloader packer 1 IoCs
- SmokeLoader
Modular backdoor trojan in use since 2014.
- Downloads MZ/PE file
- Executes dropped EXE 2 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.
- Program crash 1 IoCs
- Checks SCSI registry key(s) 3 TTPs 6 IoCs
SCSI information is often read in order to detect sandboxing environments.
- Suspicious behavior: EnumeratesProcesses 64 IoCs
- Suspicious behavior: GetForegroundWindowSpam 1 IoCs
- Suspicious behavior: MapViewOfSection 2 IoCs
- Suspicious use of AdjustPrivilegeToken 5 IoCs
- Suspicious use of WriteProcessMemory 3 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe"1⤵
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
-
C:\Users\Admin\AppData\Local\Temp\F5BA.exeC:\Users\Admin\AppData\Local\Temp\F5BA.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 2684 -s 13122⤵
- Program crash
-
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 2684 -ip 26841⤵
-
C:\Users\Admin\AppData\Roaming\rrcbwdbC:\Users\Admin\AppData\Roaming\rrcbwdb1⤵
- Executes dropped EXE
- Checks SCSI registry key(s)
- Suspicious behavior: MapViewOfSection
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
F5BA.exe
F5BA.exe
rrcbwdb
rrcbwdb
memory/2684-146-0x0000000004C60000-0x0000000004C9C000-memory.dmp
memory/2684-149-0x0000000006500000-0x00000000066C2000-memory.dmp
memory/2684-156-0x0000000000400000-0x00000000005A5000-memory.dmp
memory/2684-139-0x0000000004CE0000-0x0000000005284000-memory.dmp
memory/2684-140-0x0000000000769000-0x0000000000793000-memory.dmp
memory/2684-141-0x0000000000700000-0x0000000000737000-memory.dmp
memory/2684-142-0x0000000000400000-0x00000000005A5000-memory.dmp
memory/2684-143-0x0000000005290000-0x00000000058A8000-memory.dmp
memory/2684-144-0x0000000002790000-0x00000000027A2000-memory.dmp
memory/2684-145-0x00000000058B0000-0x00000000059BA000-memory.dmp
memory/2684-155-0x0000000000769000-0x0000000000793000-memory.dmp
memory/2684-147-0x0000000005C60000-0x0000000005CC6000-memory.dmp
memory/2684-148-0x0000000006200000-0x0000000006292000-memory.dmp
memory/2684-150-0x00000000066D0000-0x0000000006BFC000-memory.dmp
memory/2684-151-0x0000000006D10000-0x0000000006D86000-memory.dmp
memory/2684-152-0x0000000006DD0000-0x0000000006DEE000-memory.dmp
memory/2684-153-0x0000000007020000-0x0000000007070000-memory.dmp
memory/2684-154-0x0000000000769000-0x0000000000793000-memory.dmp
memory/2812-132-0x000000000072E000-0x000000000073E000-memory.dmp
memory/2812-135-0x0000000000400000-0x0000000000456000-memory.dmp
memory/2812-134-0x0000000000400000-0x0000000000456000-memory.dmp
memory/2812-133-0x00000000005A0000-0x00000000005A9000-memory.dmp
memory/3744-159-0x00000000006EF000-0x00000000006FF000-memory.dmp
memory/3744-160-0x0000000000400000-0x0000000000456000-memory.dmp
memory/3744-161-0x0000000000400000-0x0000000000456000-memory.dmp