Analysis
- max time kernel
155s - max time network
178s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system - submitted
02/12/2022, 02:08
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 192KB
- Sample221202-ckk6msgd4v
- SHA256 728174a6ad4beb1cebbc419b6f5177b8cc639d8934296d465798f0b8837a6c1f
- MD5 367d6274c01aed73ad554d5fb2133b96
- SHA1 5a6011bc3f2e33fc3543d361e841cdeacac25ed4
- SHA512 f1c163bd6c2272eb92a48be453e89438793db8197d9c5e93c1536b9b965d0e75fcad1e7bb2448f2dbd1c5d44bdaf2df2ec9c3ae5d81cc051c8dcf0c692c7afc7
- SSDEEP 3072:Ng89XAkBffI55c16sPpA9ZXMevi1mKVsRs9E3AZxpR/fop+:NBfsc1txUZgXVNvp1K+
- MD5 SHA1 SHA512 SSDEEP
Score
10/10
Malware Config
Signatures
- Detects Smokeloader packer 6 IoCs
resource yara_rule behavioral2/memory/4860-134-0x0000000000400000-0x0000000000409000-memory.dmp family_smokeloader behavioral2/memory/4616-135-0x00000000004E0000-0x00000000004E9000-memory.dmp family_smokeloader behavioral2/memory/4860-137-0x0000000000400000-0x0000000000409000-memory.dmp family_smokeloader behavioral2/memory/4860-138-0x0000000000400000-0x0000000000409000-memory.dmp family_smokeloader behavioral2/memory/4844-146-0x0000000000400000-0x0000000000409000-memory.dmp family_smokeloader behavioral2/memory/4844-147-0x0000000000400000-0x0000000000409000-memory.dmp family_smokeloader - SmokeLoader
Modular backdoor trojan in use since 2014.
- Executes dropped EXE 2 IoCs
pid Process 1396 vcrtbfd 4844 vcrtbfd - Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 4616 set thread context of 4860 4616 file.exe 80 PID 1396 set thread context of 4844 1396 vcrtbfd 83 - Checks SCSI registry key(s) 3 TTPs 6 IoCs
SCSI information is often read in order to detect sandboxing environments.
description ioc Process 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 vcrtbfd Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI vcrtbfd Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI vcrtbfd Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI file.exe - Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 4860 file.exe 4860 file.exe 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found 2804 Process not Found - Suspicious behavior: GetForegroundWindowSpam 1 IoCs
pid Process 2804 Process not Found - Suspicious behavior: MapViewOfSection 2 IoCs
pid Process 4860 file.exe 4844 vcrtbfd - Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeShutdownPrivilege 2804 Process not Found Token: SeCreatePagefilePrivilege 2804 Process not Found - Suspicious use of WriteProcessMemory 12 IoCs
description pid Process procid_target PID 4616 wrote to memory of 4860 4616 file.exe 80 PID 4616 wrote to memory of 4860 4616 file.exe 80 PID 4616 wrote to memory of 4860 4616 file.exe 80 PID 4616 wrote to memory of 4860 4616 file.exe 80 PID 4616 wrote to memory of 4860 4616 file.exe 80 PID 4616 wrote to memory of 4860 4616 file.exe 80 PID 1396 wrote to memory of 4844 1396 vcrtbfd 83 PID 1396 wrote to memory of 4844 1396 vcrtbfd 83 PID 1396 wrote to memory of 4844 1396 vcrtbfd 83 PID 1396 wrote to memory of 4844 1396 vcrtbfd 83 PID 1396 wrote to memory of 4844 1396 vcrtbfd 83 PID 1396 wrote to memory of 4844 1396 vcrtbfd 83
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:4616 -
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:4860
-
-
C:\Users\Admin\AppData\Roaming\vcrtbfdC:\Users\Admin\AppData\Roaming\vcrtbfd1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1396 -
C:\Users\Admin\AppData\Roaming\vcrtbfdC:\Users\Admin\AppData\Roaming\vcrtbfd2⤵
- Executes dropped EXE
- Checks SCSI registry key(s)
- Suspicious behavior: MapViewOfSection
PID:4844
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Roaming\vcrtbfd
- Size 192KB
- SHA256 728174a6ad4beb1cebbc419b6f5177b8cc639d8934296d465798f0b8837a6c1f
- MD5 367d6274c01aed73ad554d5fb2133b96
- SHA1 5a6011bc3f2e33fc3543d361e841cdeacac25ed4
- SHA512 f1c163bd6c2272eb92a48be453e89438793db8197d9c5e93c1536b9b965d0e75fcad1e7bb2448f2dbd1c5d44bdaf2df2ec9c3ae5d81cc051c8dcf0c692c7afc7
- SSDEEP 3072:Ng89XAkBffI55c16sPpA9ZXMevi1mKVsRs9E3AZxpR/fop+:NBfsc1txUZgXVNvp1K+
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Roaming\vcrtbfd
- Size 192KB
- SHA256 728174a6ad4beb1cebbc419b6f5177b8cc639d8934296d465798f0b8837a6c1f
- MD5 367d6274c01aed73ad554d5fb2133b96
- SHA1 5a6011bc3f2e33fc3543d361e841cdeacac25ed4
- SHA512 f1c163bd6c2272eb92a48be453e89438793db8197d9c5e93c1536b9b965d0e75fcad1e7bb2448f2dbd1c5d44bdaf2df2ec9c3ae5d81cc051c8dcf0c692c7afc7
- SSDEEP 3072:Ng89XAkBffI55c16sPpA9ZXMevi1mKVsRs9E3AZxpR/fop+:NBfsc1txUZgXVNvp1K+
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Roaming\vcrtbfd
- Size 192KB
- SHA256 728174a6ad4beb1cebbc419b6f5177b8cc639d8934296d465798f0b8837a6c1f
- MD5 367d6274c01aed73ad554d5fb2133b96
- SHA1 5a6011bc3f2e33fc3543d361e841cdeacac25ed4
- SHA512 f1c163bd6c2272eb92a48be453e89438793db8197d9c5e93c1536b9b965d0e75fcad1e7bb2448f2dbd1c5d44bdaf2df2ec9c3ae5d81cc051c8dcf0c692c7afc7
- SSDEEP 3072:Ng89XAkBffI55c16sPpA9ZXMevi1mKVsRs9E3AZxpR/fop+:NBfsc1txUZgXVNvp1K+
- MD5 SHA1 SHA512 SSDEEP