Analysis
- max time kernel
160s - max time network
163s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system - submitted
18/01/2023, 01:08
Static task
static1
Behavioral task
behavioral1
Sample
file.exe
Resource
win7-20220812-en
windows7-x64
7 signatures
150 seconds
Behavioral task
behavioral2
Sample
file.exe
Resource
win10v2004-20220812-en
windows10-2004-x64
10 signatures
150 seconds
General
- Target file.exe
- Size 226KB
- Sample230118-bg8bbsdf23
- SHA256 2d93aeddfa6c834e6cc0b1d6f31ab553dfc9bbd9e702e922ea576d4e8333c773
- MD5 caa2990b299e987f7d43ed5b7e0455df
- SHA1 95046258efd530ffa317aa4ab7141ded741580ba
- SHA512 25b9244334056cef31cfcb23f21490a1987e7d8d1eb46a8b5523382dd470c478bc7be0fe03d0c91b7dc82ccad44f0f490e7b850f14506f2f7f339fdd120cb783
- SSDEEP 3072:geFX3VCDEh1XPYojMSXjT52uy0LLYLJ51lBAzWZWrLVhbAV4hdePGmlCt4qnA:nBb9PYowSX/v81lmqW/V1Aadal8L
- MD5 SHA1 SHA512 SSDEEP
Score
10/10
Malware Config
Signatures
- Detects Smokeloader packer 6 IoCs
resource yara_rule behavioral2/memory/2156-133-0x0000000000400000-0x0000000000409000-memory.dmp family_smokeloader behavioral2/memory/3700-135-0x0000000002D00000-0x0000000002D09000-memory.dmp family_smokeloader behavioral2/memory/2156-136-0x0000000000400000-0x0000000000409000-memory.dmp family_smokeloader behavioral2/memory/2156-137-0x0000000000400000-0x0000000000409000-memory.dmp family_smokeloader behavioral2/memory/3880-144-0x0000000000400000-0x0000000000409000-memory.dmp family_smokeloader behavioral2/memory/3880-145-0x0000000000400000-0x0000000000409000-memory.dmp family_smokeloader - SmokeLoader
Modular backdoor trojan in use since 2014.
- Executes dropped EXE 2 IoCs
pid Process 2328 wurbeft 3880 wurbeft - Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 3700 set thread context of 2156 3700 file.exe 79 PID 2328 set thread context of 3880 2328 wurbeft 88 - Checks SCSI registry key(s) 3 TTPs 6 IoCs
SCSI information is often read in order to detect sandboxing environments.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI file.exe Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI file.exe Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI file.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI wurbeft Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI wurbeft Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI wurbeft - Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 2156 file.exe 2156 file.exe 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found 1272 Process not Found - Suspicious behavior: GetForegroundWindowSpam 1 IoCs
pid Process 1272 Process not Found - Suspicious behavior: MapViewOfSection 2 IoCs
pid Process 2156 file.exe 3880 wurbeft - Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeShutdownPrivilege 1272 Process not Found Token: SeCreatePagefilePrivilege 1272 Process not Found - Suspicious use of WriteProcessMemory 12 IoCs
description pid Process procid_target PID 3700 wrote to memory of 2156 3700 file.exe 79 PID 3700 wrote to memory of 2156 3700 file.exe 79 PID 3700 wrote to memory of 2156 3700 file.exe 79 PID 3700 wrote to memory of 2156 3700 file.exe 79 PID 3700 wrote to memory of 2156 3700 file.exe 79 PID 3700 wrote to memory of 2156 3700 file.exe 79 PID 2328 wrote to memory of 3880 2328 wurbeft 88 PID 2328 wrote to memory of 3880 2328 wurbeft 88 PID 2328 wrote to memory of 3880 2328 wurbeft 88 PID 2328 wrote to memory of 3880 2328 wurbeft 88 PID 2328 wrote to memory of 3880 2328 wurbeft 88 PID 2328 wrote to memory of 3880 2328 wurbeft 88
Processes
-
C:\Users\Admin\AppData\Local\Temp\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3700 -
C:\Users\Admin\AppData\Local\Temp\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe"2⤵
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
PID:2156
-
-
C:\Users\Admin\AppData\Roaming\wurbeftC:\Users\Admin\AppData\Roaming\wurbeft1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2328 -
C:\Users\Admin\AppData\Roaming\wurbeftC:\Users\Admin\AppData\Roaming\wurbeft2⤵
- Executes dropped EXE
- Checks SCSI registry key(s)
- Suspicious behavior: MapViewOfSection
PID:3880
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Roaming\wurbeft
- Size 226KB
- SHA256 2d93aeddfa6c834e6cc0b1d6f31ab553dfc9bbd9e702e922ea576d4e8333c773
- MD5 caa2990b299e987f7d43ed5b7e0455df
- SHA1 95046258efd530ffa317aa4ab7141ded741580ba
- SHA512 25b9244334056cef31cfcb23f21490a1987e7d8d1eb46a8b5523382dd470c478bc7be0fe03d0c91b7dc82ccad44f0f490e7b850f14506f2f7f339fdd120cb783
- SSDEEP 3072:geFX3VCDEh1XPYojMSXjT52uy0LLYLJ51lBAzWZWrLVhbAV4hdePGmlCt4qnA:nBb9PYowSX/v81lmqW/V1Aadal8L
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Roaming\wurbeft
- Size 226KB
- SHA256 2d93aeddfa6c834e6cc0b1d6f31ab553dfc9bbd9e702e922ea576d4e8333c773
- MD5 caa2990b299e987f7d43ed5b7e0455df
- SHA1 95046258efd530ffa317aa4ab7141ded741580ba
- SHA512 25b9244334056cef31cfcb23f21490a1987e7d8d1eb46a8b5523382dd470c478bc7be0fe03d0c91b7dc82ccad44f0f490e7b850f14506f2f7f339fdd120cb783
- SSDEEP 3072:geFX3VCDEh1XPYojMSXjT52uy0LLYLJ51lBAzWZWrLVhbAV4hdePGmlCt4qnA:nBb9PYowSX/v81lmqW/V1Aadal8L
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Roaming\wurbeft
- Size 226KB
- SHA256 2d93aeddfa6c834e6cc0b1d6f31ab553dfc9bbd9e702e922ea576d4e8333c773
- MD5 caa2990b299e987f7d43ed5b7e0455df
- SHA1 95046258efd530ffa317aa4ab7141ded741580ba
- SHA512 25b9244334056cef31cfcb23f21490a1987e7d8d1eb46a8b5523382dd470c478bc7be0fe03d0c91b7dc82ccad44f0f490e7b850f14506f2f7f339fdd120cb783
- SSDEEP 3072:geFX3VCDEh1XPYojMSXjT52uy0LLYLJ51lBAzWZWrLVhbAV4hdePGmlCt4qnA:nBb9PYowSX/v81lmqW/V1Aadal8L
- MD5 SHA1 SHA512 SSDEEP