Analysis
- max time kernel
150s - max time network
141s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system - submitted
31/12/2022, 09:39
Static task
static1
Behavioral task
behavioral1
Sample
file.exe
Resource
win7-20220901-en
windows7-x64
8 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 295KB
- Sample221231-lml1dshd79
- SHA256 aa9ad8f31651f0ba745bf089cc71b29b33e40ff086cbead9f8c1ed82507fedb2
- MD5 c879102fc414340426e6d589b661f601
- SHA1 a1e4f20caf16716b6f8161d075e9b2d794fd79cc
- SHA512 76c7aff0f890136f4953d929c0a381d7ef6ba70e8f896d49c12620cbf2342888e8ffec8a09255548cd12ef3d91c9a92bdec1207ecf5c5d9089c44b926c91e25e
- SSDEEP 3072:xZ6q0BC4L9RncYOoRY+EshzMZCslXiAHsPmOHmq1mq+SU27hZYw8sS:569LncYSMoZCstwGdlyZYw
- MD5 SHA1 SHA512 SSDEEP
Score
10/10
Malware Config
Signatures
- Detects Smokeloader packer 6 IoCs
resource yara_rule behavioral2/memory/744-133-0x0000000000400000-0x0000000000409000-memory.dmp family_smokeloader behavioral2/memory/3316-135-0x0000000000620000-0x0000000000629000-memory.dmp family_smokeloader behavioral2/memory/744-136-0x0000000000400000-0x0000000000409000-memory.dmp family_smokeloader behavioral2/memory/744-137-0x0000000000400000-0x0000000000409000-memory.dmp family_smokeloader behavioral2/memory/400-144-0x0000000000400000-0x0000000000409000-memory.dmp family_smokeloader behavioral2/memory/400-145-0x0000000000400000-0x0000000000409000-memory.dmp family_smokeloader - SmokeLoader
Modular backdoor trojan in use since 2014.
- Executes dropped EXE 2 IoCs
pid Process 4020 ichrbcs 400 ichrbcs - Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 3316 set thread context of 744 3316 file.exe 81 PID 4020 set thread context of 400 4020 ichrbcs 90 - 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 ichrbcs Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI ichrbcs Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI ichrbcs 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 - Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 744 file.exe 744 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 744 file.exe 400 ichrbcs - 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 3316 wrote to memory of 744 3316 file.exe 81 PID 3316 wrote to memory of 744 3316 file.exe 81 PID 3316 wrote to memory of 744 3316 file.exe 81 PID 3316 wrote to memory of 744 3316 file.exe 81 PID 3316 wrote to memory of 744 3316 file.exe 81 PID 3316 wrote to memory of 744 3316 file.exe 81 PID 4020 wrote to memory of 400 4020 ichrbcs 90 PID 4020 wrote to memory of 400 4020 ichrbcs 90 PID 4020 wrote to memory of 400 4020 ichrbcs 90 PID 4020 wrote to memory of 400 4020 ichrbcs 90 PID 4020 wrote to memory of 400 4020 ichrbcs 90 PID 4020 wrote to memory of 400 4020 ichrbcs 90
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:3316 -
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:744
-
-
C:\Users\Admin\AppData\Roaming\ichrbcsC:\Users\Admin\AppData\Roaming\ichrbcs1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4020 -
C:\Users\Admin\AppData\Roaming\ichrbcsC:\Users\Admin\AppData\Roaming\ichrbcs2⤵
- Executes dropped EXE
- Checks SCSI registry key(s)
- Suspicious behavior: MapViewOfSection
PID:400
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Roaming\ichrbcs
- Size 295KB
- SHA256 aa9ad8f31651f0ba745bf089cc71b29b33e40ff086cbead9f8c1ed82507fedb2
- MD5 c879102fc414340426e6d589b661f601
- SHA1 a1e4f20caf16716b6f8161d075e9b2d794fd79cc
- SHA512 76c7aff0f890136f4953d929c0a381d7ef6ba70e8f896d49c12620cbf2342888e8ffec8a09255548cd12ef3d91c9a92bdec1207ecf5c5d9089c44b926c91e25e
- SSDEEP 3072:xZ6q0BC4L9RncYOoRY+EshzMZCslXiAHsPmOHmq1mq+SU27hZYw8sS:569LncYSMoZCstwGdlyZYw
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Roaming\ichrbcs
- Size 295KB
- SHA256 aa9ad8f31651f0ba745bf089cc71b29b33e40ff086cbead9f8c1ed82507fedb2
- MD5 c879102fc414340426e6d589b661f601
- SHA1 a1e4f20caf16716b6f8161d075e9b2d794fd79cc
- SHA512 76c7aff0f890136f4953d929c0a381d7ef6ba70e8f896d49c12620cbf2342888e8ffec8a09255548cd12ef3d91c9a92bdec1207ecf5c5d9089c44b926c91e25e
- SSDEEP 3072:xZ6q0BC4L9RncYOoRY+EshzMZCslXiAHsPmOHmq1mq+SU27hZYw8sS:569LncYSMoZCstwGdlyZYw
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Roaming\ichrbcs
- Size 295KB
- SHA256 aa9ad8f31651f0ba745bf089cc71b29b33e40ff086cbead9f8c1ed82507fedb2
- MD5 c879102fc414340426e6d589b661f601
- SHA1 a1e4f20caf16716b6f8161d075e9b2d794fd79cc
- SHA512 76c7aff0f890136f4953d929c0a381d7ef6ba70e8f896d49c12620cbf2342888e8ffec8a09255548cd12ef3d91c9a92bdec1207ecf5c5d9089c44b926c91e25e
- SSDEEP 3072:xZ6q0BC4L9RncYOoRY+EshzMZCslXiAHsPmOHmq1mq+SU27hZYw8sS:569LncYSMoZCstwGdlyZYw
- MD5 SHA1 SHA512 SSDEEP