Analysis
- max time kernel
150s - max time network
142s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system - submitted
27/08/2022, 11:09
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
12 signatures
150 seconds
General
- Target file.exe
- Size 131KB
- Sample220827-m84b8sbae8
- SHA256 5b2152d818fcbbc7b16d7bfeaf98e378274da2e3549273000ab7c628d5d57ff0
- MD5 e9a6d616d7599d6d4b3a82697653bbbb
- SHA1 4d7e521dc7f53d92cfbc99bb577cd8ee5f21d636
- SHA512 fb73c1ddc0db2ae0819d974ca1761044614c67a8ec238b1e7206c309f015141c9f1cdf1b89f82d16b3ca57e9a48508c85023fb383b1e71111e315a3a65ea3d33
- SSDEEP 1536:698rXcaRghQkpuzT8y5mYqpwAcfJEzadEZ4EZ3rUgUvNoy/gJcHXRmfUUW+tf:6erXca2VpK5mYqi1dzEZ3rUgUFgPjz
- MD5 SHA1 SHA512 SSDEEP
Score
10/10
Malware Config
Signatures
- Detects Smokeloader packer 6 IoCs
resource yara_rule behavioral2/memory/4900-133-0x0000000000400000-0x0000000000409000-memory.dmp family_smokeloader behavioral2/memory/1524-135-0x00000000005E0000-0x00000000005E9000-memory.dmp family_smokeloader behavioral2/memory/4900-136-0x0000000000400000-0x0000000000409000-memory.dmp family_smokeloader behavioral2/memory/4900-137-0x0000000000400000-0x0000000000409000-memory.dmp family_smokeloader behavioral2/memory/3612-144-0x0000000000400000-0x0000000000409000-memory.dmp family_smokeloader behavioral2/memory/3612-145-0x0000000000400000-0x0000000000409000-memory.dmp family_smokeloader - SmokeLoader
Modular backdoor trojan in use since 2014.
- Executes dropped EXE 2 IoCs
pid Process 2256 utsgcrv 3612 utsgcrv - Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 1524 set thread context of 4900 1524 file.exe 84 PID 2256 set thread context of 3612 2256 utsgcrv 95 - 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 utsgcrv Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI utsgcrv Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI utsgcrv Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI file.exe Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI file.exe - Modifies registry class 2 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-1502147629-2175634256-330282290-1000_Classes\CLSID\{018D5C66-4533-4307-9B53-224DE2ED1FE6}\Instance\ Process not Found Key created \REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{4336a54d-038b-4685-ab02-99bb52d3fb8b}\Instance\ Process not Found - Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 4900 file.exe 4900 file.exe 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found 748 Process not Found - Suspicious behavior: GetForegroundWindowSpam 1 IoCs
pid Process 748 Process not Found - Suspicious behavior: MapViewOfSection 2 IoCs
pid Process 4900 file.exe 3612 utsgcrv - Suspicious use of AdjustPrivilegeToken 18 IoCs
description pid Process Token: SeShutdownPrivilege 748 Process not Found Token: SeCreatePagefilePrivilege 748 Process not Found Token: SeShutdownPrivilege 748 Process not Found Token: SeCreatePagefilePrivilege 748 Process not Found Token: SeShutdownPrivilege 748 Process not Found Token: SeCreatePagefilePrivilege 748 Process not Found Token: SeShutdownPrivilege 748 Process not Found Token: SeCreatePagefilePrivilege 748 Process not Found Token: SeShutdownPrivilege 748 Process not Found Token: SeCreatePagefilePrivilege 748 Process not Found Token: SeShutdownPrivilege 748 Process not Found Token: SeCreatePagefilePrivilege 748 Process not Found Token: SeShutdownPrivilege 748 Process not Found Token: SeCreatePagefilePrivilege 748 Process not Found Token: SeShutdownPrivilege 748 Process not Found Token: SeCreatePagefilePrivilege 748 Process not Found Token: SeShutdownPrivilege 748 Process not Found Token: SeCreatePagefilePrivilege 748 Process not Found - Suspicious use of FindShellTrayWindow 2 IoCs
pid Process 748 Process not Found 748 Process not Found - Suspicious use of WriteProcessMemory 12 IoCs
description pid Process procid_target PID 1524 wrote to memory of 4900 1524 file.exe 84 PID 1524 wrote to memory of 4900 1524 file.exe 84 PID 1524 wrote to memory of 4900 1524 file.exe 84 PID 1524 wrote to memory of 4900 1524 file.exe 84 PID 1524 wrote to memory of 4900 1524 file.exe 84 PID 1524 wrote to memory of 4900 1524 file.exe 84 PID 2256 wrote to memory of 3612 2256 utsgcrv 95 PID 2256 wrote to memory of 3612 2256 utsgcrv 95 PID 2256 wrote to memory of 3612 2256 utsgcrv 95 PID 2256 wrote to memory of 3612 2256 utsgcrv 95 PID 2256 wrote to memory of 3612 2256 utsgcrv 95 PID 2256 wrote to memory of 3612 2256 utsgcrv 95
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:1524 -
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:4900
-
-
C:\Users\Admin\AppData\Roaming\utsgcrvC:\Users\Admin\AppData\Roaming\utsgcrv1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2256 -
C:\Users\Admin\AppData\Roaming\utsgcrvC:\Users\Admin\AppData\Roaming\utsgcrv2⤵
- Executes dropped EXE
- Checks SCSI registry key(s)
- Suspicious behavior: MapViewOfSection
PID:3612
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Roaming\utsgcrv
- Size 131KB
- SHA256 5b2152d818fcbbc7b16d7bfeaf98e378274da2e3549273000ab7c628d5d57ff0
- MD5 e9a6d616d7599d6d4b3a82697653bbbb
- SHA1 4d7e521dc7f53d92cfbc99bb577cd8ee5f21d636
- SHA512 fb73c1ddc0db2ae0819d974ca1761044614c67a8ec238b1e7206c309f015141c9f1cdf1b89f82d16b3ca57e9a48508c85023fb383b1e71111e315a3a65ea3d33
- SSDEEP 1536:698rXcaRghQkpuzT8y5mYqpwAcfJEzadEZ4EZ3rUgUvNoy/gJcHXRmfUUW+tf:6erXca2VpK5mYqi1dzEZ3rUgUFgPjz
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Roaming\utsgcrv
- Size 131KB
- SHA256 5b2152d818fcbbc7b16d7bfeaf98e378274da2e3549273000ab7c628d5d57ff0
- MD5 e9a6d616d7599d6d4b3a82697653bbbb
- SHA1 4d7e521dc7f53d92cfbc99bb577cd8ee5f21d636
- SHA512 fb73c1ddc0db2ae0819d974ca1761044614c67a8ec238b1e7206c309f015141c9f1cdf1b89f82d16b3ca57e9a48508c85023fb383b1e71111e315a3a65ea3d33
- SSDEEP 1536:698rXcaRghQkpuzT8y5mYqpwAcfJEzadEZ4EZ3rUgUvNoy/gJcHXRmfUUW+tf:6erXca2VpK5mYqi1dzEZ3rUgUFgPjz
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Roaming\utsgcrv
- Size 131KB
- SHA256 5b2152d818fcbbc7b16d7bfeaf98e378274da2e3549273000ab7c628d5d57ff0
- MD5 e9a6d616d7599d6d4b3a82697653bbbb
- SHA1 4d7e521dc7f53d92cfbc99bb577cd8ee5f21d636
- SHA512 fb73c1ddc0db2ae0819d974ca1761044614c67a8ec238b1e7206c309f015141c9f1cdf1b89f82d16b3ca57e9a48508c85023fb383b1e71111e315a3a65ea3d33
- SSDEEP 1536:698rXcaRghQkpuzT8y5mYqpwAcfJEzadEZ4EZ3rUgUvNoy/gJcHXRmfUUW+tf:6erXca2VpK5mYqi1dzEZ3rUgUFgPjz
- MD5 SHA1 SHA512 SSDEEP