Analysis
- max time kernel
150s - max time network
144s - platform
windows10-2004_x64 - resource
win10v2004-20221111-en - resource tags
arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system - submitted
05/02/2023, 02:18
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
win10v2004-20221111-en
windows10-2004-x64
10 signatures
150 seconds
General
- Target file.exe
- Size 192KB
- Sample230205-cq92ysbb8x
- SHA256 21e93bc22260e4e6b3752b7935309f8f72ec8e90347448c208051b69a5c4ef71
- MD5 386b2f812208023c0843dccf1596d42c
- SHA1 79fe2599dae3e463e3afbeda5c3ee2e78da41a84
- SHA512 12a58c9bbf06838912af919b38aa88e59dba8e19c3dbb5b97bef95e5b656ded04494ee243e98894d4b415a80d6afc10067f44d2fca2a2532d7909dafee0459e3
- SSDEEP 3072:MtPOFPrNTtisLqIfWZi5PWLspMkDzRjEVQipa+YBETKCfVN:MtPK/isLBf5EQl+OOKC9N
- MD5 SHA1 SHA512 SSDEEP
Score
10/10
Malware Config
Signatures
- Detects Smokeloader packer 6 IoCs
resource yara_rule behavioral2/memory/2152-133-0x0000000000400000-0x0000000000409000-memory.dmp family_smokeloader behavioral2/memory/4156-135-0x00000000006F0000-0x00000000006F9000-memory.dmp family_smokeloader behavioral2/memory/2152-136-0x0000000000400000-0x0000000000409000-memory.dmp family_smokeloader behavioral2/memory/2152-137-0x0000000000400000-0x0000000000409000-memory.dmp family_smokeloader behavioral2/memory/2576-144-0x0000000000400000-0x0000000000409000-memory.dmp family_smokeloader behavioral2/memory/2576-145-0x0000000000400000-0x0000000000409000-memory.dmp family_smokeloader - SmokeLoader
Modular backdoor trojan in use since 2014.
- Executes dropped EXE 2 IoCs
pid Process 4968 cbrfvac 2576 cbrfvac - Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 4156 set thread context of 2152 4156 file.exe 86 PID 4968 set thread context of 2576 4968 cbrfvac 92 - Checks SCSI registry key(s) 3 TTPs 6 IoCs
SCSI information is often read in order to detect sandboxing environments.
description ioc Process Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI file.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI cbrfvac Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI cbrfvac Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI cbrfvac Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI file.exe Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI file.exe - Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 2152 file.exe 2152 file.exe 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found 2480 Process not Found - Suspicious behavior: GetForegroundWindowSpam 1 IoCs
pid Process 2480 Process not Found - Suspicious behavior: MapViewOfSection 2 IoCs
pid Process 2152 file.exe 2576 cbrfvac - Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeShutdownPrivilege 2480 Process not Found Token: SeCreatePagefilePrivilege 2480 Process not Found - Suspicious use of WriteProcessMemory 12 IoCs
description pid Process procid_target PID 4156 wrote to memory of 2152 4156 file.exe 86 PID 4156 wrote to memory of 2152 4156 file.exe 86 PID 4156 wrote to memory of 2152 4156 file.exe 86 PID 4156 wrote to memory of 2152 4156 file.exe 86 PID 4156 wrote to memory of 2152 4156 file.exe 86 PID 4156 wrote to memory of 2152 4156 file.exe 86 PID 4968 wrote to memory of 2576 4968 cbrfvac 92 PID 4968 wrote to memory of 2576 4968 cbrfvac 92 PID 4968 wrote to memory of 2576 4968 cbrfvac 92 PID 4968 wrote to memory of 2576 4968 cbrfvac 92 PID 4968 wrote to memory of 2576 4968 cbrfvac 92 PID 4968 wrote to memory of 2576 4968 cbrfvac 92
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:4156 -
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:2152
-
-
C:\Users\Admin\AppData\Roaming\cbrfvacC:\Users\Admin\AppData\Roaming\cbrfvac1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4968 -
C:\Users\Admin\AppData\Roaming\cbrfvacC:\Users\Admin\AppData\Roaming\cbrfvac2⤵
- Executes dropped EXE
- Checks SCSI registry key(s)
- Suspicious behavior: MapViewOfSection
PID:2576
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Roaming\cbrfvac
- Size 192KB
- SHA256 21e93bc22260e4e6b3752b7935309f8f72ec8e90347448c208051b69a5c4ef71
- MD5 386b2f812208023c0843dccf1596d42c
- SHA1 79fe2599dae3e463e3afbeda5c3ee2e78da41a84
- SHA512 12a58c9bbf06838912af919b38aa88e59dba8e19c3dbb5b97bef95e5b656ded04494ee243e98894d4b415a80d6afc10067f44d2fca2a2532d7909dafee0459e3
- SSDEEP 3072:MtPOFPrNTtisLqIfWZi5PWLspMkDzRjEVQipa+YBETKCfVN:MtPK/isLBf5EQl+OOKC9N
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Roaming\cbrfvac
- Size 192KB
- SHA256 21e93bc22260e4e6b3752b7935309f8f72ec8e90347448c208051b69a5c4ef71
- MD5 386b2f812208023c0843dccf1596d42c
- SHA1 79fe2599dae3e463e3afbeda5c3ee2e78da41a84
- SHA512 12a58c9bbf06838912af919b38aa88e59dba8e19c3dbb5b97bef95e5b656ded04494ee243e98894d4b415a80d6afc10067f44d2fca2a2532d7909dafee0459e3
- SSDEEP 3072:MtPOFPrNTtisLqIfWZi5PWLspMkDzRjEVQipa+YBETKCfVN:MtPK/isLBf5EQl+OOKC9N
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Roaming\cbrfvac
- Size 192KB
- SHA256 21e93bc22260e4e6b3752b7935309f8f72ec8e90347448c208051b69a5c4ef71
- MD5 386b2f812208023c0843dccf1596d42c
- SHA1 79fe2599dae3e463e3afbeda5c3ee2e78da41a84
- SHA512 12a58c9bbf06838912af919b38aa88e59dba8e19c3dbb5b97bef95e5b656ded04494ee243e98894d4b415a80d6afc10067f44d2fca2a2532d7909dafee0459e3
- SSDEEP 3072:MtPOFPrNTtisLqIfWZi5PWLspMkDzRjEVQipa+YBETKCfVN:MtPK/isLBf5EQl+OOKC9N
- MD5 SHA1 SHA512 SSDEEP