Analysis
- max time kernel
150s - max time network
114s - platform
windows10-2004_x64 - resource
win10v2004-20220901-en - resource tags
arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system - submitted
16/12/2022, 16:09
Static task
static1
Behavioral task
behavioral1
Sample
file.exe
Resource
win7-20221111-en
windows7-x64
8 signatures
150 seconds
Behavioral task
behavioral2
Sample
file.exe
Resource
win10v2004-20220901-en
windows10-2004-x64
10 signatures
150 seconds
General
- Target file.exe
- Size 214KB
- Sample221216-tlr41sfa45
- SHA256 4dc101ad2ec4b54ee898bbc532cd8858641b4ec8a03afbeea80b90421025428f
- MD5 3f882a5db6956c55b9d53655b54c7a0c
- SHA1 28e19c4bcf7ee7aa59a5fa028d6233bd8a06af90
- SHA512 d787997ca46f4d00f782f9baf0cd799288481c8d89289802ec67dbc01edd5042d44993b5472281e3a344c80f8834e6a013ac898edcf9a5dd494e6d208181583e
- SSDEEP 3072:/KUzwL7+r/0R7I3ySK7giFiNdYjXbBmLsz0j40zwUzQRKF+:yJLqrvjbiPDbBmgzM40M2b
- MD5 SHA1 SHA512 SSDEEP
Score
10/10
Malware Config
Signatures
- Detects Smokeloader packer 6 IoCs
resource yara_rule behavioral2/memory/1952-133-0x0000000000400000-0x0000000000409000-memory.dmp family_smokeloader behavioral2/memory/3656-135-0x00000000001F0000-0x00000000001F9000-memory.dmp family_smokeloader behavioral2/memory/1952-136-0x0000000000400000-0x0000000000409000-memory.dmp family_smokeloader behavioral2/memory/1952-137-0x0000000000400000-0x0000000000409000-memory.dmp family_smokeloader behavioral2/memory/380-144-0x0000000000400000-0x0000000000409000-memory.dmp family_smokeloader behavioral2/memory/380-145-0x0000000000400000-0x0000000000409000-memory.dmp family_smokeloader - SmokeLoader
Modular backdoor trojan in use since 2014.
- Executes dropped EXE 2 IoCs
pid Process 4396 wcsjebv 380 wcsjebv - Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 3656 set thread context of 1952 3656 file.exe 79 PID 4396 set thread context of 380 4396 wcsjebv 89 - 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 wcsjebv Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI wcsjebv Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI wcsjebv 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 1952 file.exe 1952 file.exe 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found 3056 Process not Found - Suspicious behavior: GetForegroundWindowSpam 1 IoCs
pid Process 3056 Process not Found - Suspicious behavior: MapViewOfSection 2 IoCs
pid Process 1952 file.exe 380 wcsjebv - Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeShutdownPrivilege 3056 Process not Found Token: SeCreatePagefilePrivilege 3056 Process not Found - Suspicious use of WriteProcessMemory 12 IoCs
description pid Process procid_target PID 3656 wrote to memory of 1952 3656 file.exe 79 PID 3656 wrote to memory of 1952 3656 file.exe 79 PID 3656 wrote to memory of 1952 3656 file.exe 79 PID 3656 wrote to memory of 1952 3656 file.exe 79 PID 3656 wrote to memory of 1952 3656 file.exe 79 PID 3656 wrote to memory of 1952 3656 file.exe 79 PID 4396 wrote to memory of 380 4396 wcsjebv 89 PID 4396 wrote to memory of 380 4396 wcsjebv 89 PID 4396 wrote to memory of 380 4396 wcsjebv 89 PID 4396 wrote to memory of 380 4396 wcsjebv 89 PID 4396 wrote to memory of 380 4396 wcsjebv 89 PID 4396 wrote to memory of 380 4396 wcsjebv 89
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:3656 -
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:1952
-
-
C:\Users\Admin\AppData\Roaming\wcsjebvC:\Users\Admin\AppData\Roaming\wcsjebv1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4396 -
C:\Users\Admin\AppData\Roaming\wcsjebvC:\Users\Admin\AppData\Roaming\wcsjebv2⤵
- Executes dropped EXE
- Checks SCSI registry key(s)
- Suspicious behavior: MapViewOfSection
PID:380
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Roaming\wcsjebv
- Size 214KB
- SHA256 4dc101ad2ec4b54ee898bbc532cd8858641b4ec8a03afbeea80b90421025428f
- MD5 3f882a5db6956c55b9d53655b54c7a0c
- SHA1 28e19c4bcf7ee7aa59a5fa028d6233bd8a06af90
- SHA512 d787997ca46f4d00f782f9baf0cd799288481c8d89289802ec67dbc01edd5042d44993b5472281e3a344c80f8834e6a013ac898edcf9a5dd494e6d208181583e
- SSDEEP 3072:/KUzwL7+r/0R7I3ySK7giFiNdYjXbBmLsz0j40zwUzQRKF+:yJLqrvjbiPDbBmgzM40M2b
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Roaming\wcsjebv
- Size 214KB
- SHA256 4dc101ad2ec4b54ee898bbc532cd8858641b4ec8a03afbeea80b90421025428f
- MD5 3f882a5db6956c55b9d53655b54c7a0c
- SHA1 28e19c4bcf7ee7aa59a5fa028d6233bd8a06af90
- SHA512 d787997ca46f4d00f782f9baf0cd799288481c8d89289802ec67dbc01edd5042d44993b5472281e3a344c80f8834e6a013ac898edcf9a5dd494e6d208181583e
- SSDEEP 3072:/KUzwL7+r/0R7I3ySK7giFiNdYjXbBmLsz0j40zwUzQRKF+:yJLqrvjbiPDbBmgzM40M2b
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Roaming\wcsjebv
- Size 214KB
- SHA256 4dc101ad2ec4b54ee898bbc532cd8858641b4ec8a03afbeea80b90421025428f
- MD5 3f882a5db6956c55b9d53655b54c7a0c
- SHA1 28e19c4bcf7ee7aa59a5fa028d6233bd8a06af90
- SHA512 d787997ca46f4d00f782f9baf0cd799288481c8d89289802ec67dbc01edd5042d44993b5472281e3a344c80f8834e6a013ac898edcf9a5dd494e6d208181583e
- SSDEEP 3072:/KUzwL7+r/0R7I3ySK7giFiNdYjXbBmLsz0j40zwUzQRKF+:yJLqrvjbiPDbBmgzM40M2b
- MD5 SHA1 SHA512 SSDEEP