Analysis
- max time kernel
151s - max time network
127s - platform
windows10-2004_x64 - resource
win10v2004-20221111-en - resource tags
arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system - submitted
10/01/2023, 23:49
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 268KB
- Sample230110-3tznhaaa49
- SHA256 b841ca75422fe9cdf0c1900968a2acb10a714aebde065981596e4a13f0118824
- MD5 88274f4668759c3481b64443692ee034
- SHA1 f15d4a6b7a2399347de43cc59295a2851af110fe
- SHA512 32c8671ce193d182c0dc25bfdb7471801eaf81b094b61763063cd41e9dd80cae95a925db16b6d90e573a2970e3ea456d50d9ca7b2ad2db3ff35ef69ab7379325
- SSDEEP 3072:3oXEWToBriYwLYQmyN1pSs5SBOsNg3v/vrVuwLpuY+htBNCanng0Pb:38ojwL/1pSrHi5uQSNng6
- MD5 SHA1 SHA512 SSDEEP
Score
10/10
Malware Config
Signatures
- Detects Smokeloader packer 6 IoCs
resource yara_rule behavioral2/memory/3576-133-0x0000000002C20000-0x0000000002C29000-memory.dmp family_smokeloader behavioral2/memory/532-135-0x0000000000400000-0x0000000000409000-memory.dmp family_smokeloader behavioral2/memory/532-137-0x0000000000400000-0x0000000000409000-memory.dmp family_smokeloader behavioral2/memory/532-138-0x0000000000400000-0x0000000000409000-memory.dmp family_smokeloader behavioral2/memory/3544-145-0x0000000000400000-0x0000000000409000-memory.dmp family_smokeloader behavioral2/memory/3544-146-0x0000000000400000-0x0000000000409000-memory.dmp family_smokeloader - SmokeLoader
Modular backdoor trojan in use since 2014.
- Executes dropped EXE 2 IoCs
pid Process 2564 wtcrfwh 3544 wtcrfwh - Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 3576 set thread context of 532 3576 file.exe 83 PID 2564 set thread context of 3544 2564 wtcrfwh 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 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 wtcrfwh Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI wtcrfwh Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI wtcrfwh - Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 532 file.exe 532 file.exe 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found 1028 Process not Found - Suspicious behavior: GetForegroundWindowSpam 1 IoCs
pid Process 1028 Process not Found - Suspicious behavior: MapViewOfSection 2 IoCs
pid Process 532 file.exe 3544 wtcrfwh - Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeShutdownPrivilege 1028 Process not Found Token: SeCreatePagefilePrivilege 1028 Process not Found - Suspicious use of WriteProcessMemory 12 IoCs
description pid Process procid_target PID 3576 wrote to memory of 532 3576 file.exe 83 PID 3576 wrote to memory of 532 3576 file.exe 83 PID 3576 wrote to memory of 532 3576 file.exe 83 PID 3576 wrote to memory of 532 3576 file.exe 83 PID 3576 wrote to memory of 532 3576 file.exe 83 PID 3576 wrote to memory of 532 3576 file.exe 83 PID 2564 wrote to memory of 3544 2564 wtcrfwh 90 PID 2564 wrote to memory of 3544 2564 wtcrfwh 90 PID 2564 wrote to memory of 3544 2564 wtcrfwh 90 PID 2564 wrote to memory of 3544 2564 wtcrfwh 90 PID 2564 wrote to memory of 3544 2564 wtcrfwh 90 PID 2564 wrote to memory of 3544 2564 wtcrfwh 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:3576 -
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:532
-
-
C:\Users\Admin\AppData\Roaming\wtcrfwhC:\Users\Admin\AppData\Roaming\wtcrfwh1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2564 -
C:\Users\Admin\AppData\Roaming\wtcrfwhC:\Users\Admin\AppData\Roaming\wtcrfwh2⤵
- Executes dropped EXE
- Checks SCSI registry key(s)
- Suspicious behavior: MapViewOfSection
PID:3544
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Roaming\wtcrfwh
- Size 268KB
- SHA256 b841ca75422fe9cdf0c1900968a2acb10a714aebde065981596e4a13f0118824
- MD5 88274f4668759c3481b64443692ee034
- SHA1 f15d4a6b7a2399347de43cc59295a2851af110fe
- SHA512 32c8671ce193d182c0dc25bfdb7471801eaf81b094b61763063cd41e9dd80cae95a925db16b6d90e573a2970e3ea456d50d9ca7b2ad2db3ff35ef69ab7379325
- SSDEEP 3072:3oXEWToBriYwLYQmyN1pSs5SBOsNg3v/vrVuwLpuY+htBNCanng0Pb:38ojwL/1pSrHi5uQSNng6
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Roaming\wtcrfwh
- Size 268KB
- SHA256 b841ca75422fe9cdf0c1900968a2acb10a714aebde065981596e4a13f0118824
- MD5 88274f4668759c3481b64443692ee034
- SHA1 f15d4a6b7a2399347de43cc59295a2851af110fe
- SHA512 32c8671ce193d182c0dc25bfdb7471801eaf81b094b61763063cd41e9dd80cae95a925db16b6d90e573a2970e3ea456d50d9ca7b2ad2db3ff35ef69ab7379325
- SSDEEP 3072:3oXEWToBriYwLYQmyN1pSs5SBOsNg3v/vrVuwLpuY+htBNCanng0Pb:38ojwL/1pSrHi5uQSNng6
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Roaming\wtcrfwh
- Size 268KB
- SHA256 b841ca75422fe9cdf0c1900968a2acb10a714aebde065981596e4a13f0118824
- MD5 88274f4668759c3481b64443692ee034
- SHA1 f15d4a6b7a2399347de43cc59295a2851af110fe
- SHA512 32c8671ce193d182c0dc25bfdb7471801eaf81b094b61763063cd41e9dd80cae95a925db16b6d90e573a2970e3ea456d50d9ca7b2ad2db3ff35ef69ab7379325
- SSDEEP 3072:3oXEWToBriYwLYQmyN1pSs5SBOsNg3v/vrVuwLpuY+htBNCanng0Pb:38ojwL/1pSrHi5uQSNng6
- MD5 SHA1 SHA512 SSDEEP