Analysis
- max time kernel
152s - max time network
128s - platform
windows10-2004_x64 - resource
win10v2004-20230220-en - resource tags
arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system - submitted
07/03/2023, 12:39
Static task
static1
Behavioral task
behavioral1
Sample
file.exe
Resource
win7-20230220-en
windows7-x64
8 signatures
150 seconds
Behavioral task
behavioral2
Sample
file.exe
Resource
win10v2004-20230220-en
windows10-2004-x64
11 signatures
150 seconds
General
- Target file.exe
- Size 261KB
- Sample230307-pvmtfaaa32
- SHA256 7d4ed405992f3e2bddb0e4401eb3a1c1306474e09ee3b680f006d5967d12756e
- MD5 d928fd4d1871b145f8ac5e522cf4ee10
- SHA1 e508d3cf0c2bca37c0ecb7a415c2fe7ac5e5f3d3
- SHA512 c10bda22063354526ab630551ccf0403c0af7b9452965da992c1f140ea069d8d22cb01b88b478c0b71c6f53d00e974d05838f54bd66e3406dec8a3305811511c
- SSDEEP 3072:qWYs2Lu3IRoHT/3fFG3mkUPWI0n/5JrpXGP3yE1HSx+fF8Py6m9k4PGVoDNb:94L/aL6JplE1ygfD9kKAMNb
- MD5 SHA1 SHA512 SSDEEP
Score
10/10
Malware Config
Extracted
Family
-
smokeloader
Version
-
2020
C2
-
http://host-file-host6.com/
-
http://host-host-file8.com/
rc4.i32
rc4.i32
Signatures
- Detects Smokeloader packer 6 IoCs
resource yara_rule behavioral2/memory/3216-134-0x0000000000400000-0x0000000000409000-memory.dmp family_smokeloader behavioral2/memory/4848-135-0x00000000020C0000-0x00000000020C9000-memory.dmp family_smokeloader behavioral2/memory/3216-136-0x0000000000400000-0x0000000000409000-memory.dmp family_smokeloader behavioral2/memory/3216-138-0x0000000000400000-0x0000000000409000-memory.dmp family_smokeloader behavioral2/memory/5104-150-0x0000000000400000-0x0000000000409000-memory.dmp family_smokeloader behavioral2/memory/5104-152-0x0000000000400000-0x0000000000409000-memory.dmp family_smokeloader - SmokeLoader
Modular backdoor trojan in use since 2014.
- Executes dropped EXE 2 IoCs
pid Process 3892 uieftds 5104 uieftds - Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 4848 set thread context of 3216 4848 file.exe 90 PID 3892 set thread context of 5104 3892 uieftds 107 - Checks SCSI registry key(s) 3 TTPs 6 IoCs
SCSI information is often read in order to detect sandboxing environments.
description ioc Process Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI uieftds Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI uieftds 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 uieftds - Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 3216 file.exe 3216 file.exe 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found 3260 Process not Found - Suspicious behavior: GetForegroundWindowSpam 1 IoCs
pid Process 3260 Process not Found - Suspicious behavior: MapViewOfSection 2 IoCs
pid Process 3216 file.exe 5104 uieftds - Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeShutdownPrivilege 3260 Process not Found Token: SeCreatePagefilePrivilege 3260 Process not Found - Suspicious use of WriteProcessMemory 12 IoCs
description pid Process procid_target PID 4848 wrote to memory of 3216 4848 file.exe 90 PID 4848 wrote to memory of 3216 4848 file.exe 90 PID 4848 wrote to memory of 3216 4848 file.exe 90 PID 4848 wrote to memory of 3216 4848 file.exe 90 PID 4848 wrote to memory of 3216 4848 file.exe 90 PID 4848 wrote to memory of 3216 4848 file.exe 90 PID 3892 wrote to memory of 5104 3892 uieftds 107 PID 3892 wrote to memory of 5104 3892 uieftds 107 PID 3892 wrote to memory of 5104 3892 uieftds 107 PID 3892 wrote to memory of 5104 3892 uieftds 107 PID 3892 wrote to memory of 5104 3892 uieftds 107 PID 3892 wrote to memory of 5104 3892 uieftds 107 - Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
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:4848 -
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:3216
-
-
C:\Users\Admin\AppData\Roaming\uieftdsC:\Users\Admin\AppData\Roaming\uieftds1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3892 -
C:\Users\Admin\AppData\Roaming\uieftdsC:\Users\Admin\AppData\Roaming\uieftds2⤵
- Executes dropped EXE
- Checks SCSI registry key(s)
- Suspicious behavior: MapViewOfSection
PID:5104
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Roaming\uieftds
- Size 261KB
- SHA256 7d4ed405992f3e2bddb0e4401eb3a1c1306474e09ee3b680f006d5967d12756e
- MD5 d928fd4d1871b145f8ac5e522cf4ee10
- SHA1 e508d3cf0c2bca37c0ecb7a415c2fe7ac5e5f3d3
- SHA512 c10bda22063354526ab630551ccf0403c0af7b9452965da992c1f140ea069d8d22cb01b88b478c0b71c6f53d00e974d05838f54bd66e3406dec8a3305811511c
- SSDEEP 3072:qWYs2Lu3IRoHT/3fFG3mkUPWI0n/5JrpXGP3yE1HSx+fF8Py6m9k4PGVoDNb:94L/aL6JplE1ygfD9kKAMNb
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Roaming\uieftds
- Size 261KB
- SHA256 7d4ed405992f3e2bddb0e4401eb3a1c1306474e09ee3b680f006d5967d12756e
- MD5 d928fd4d1871b145f8ac5e522cf4ee10
- SHA1 e508d3cf0c2bca37c0ecb7a415c2fe7ac5e5f3d3
- SHA512 c10bda22063354526ab630551ccf0403c0af7b9452965da992c1f140ea069d8d22cb01b88b478c0b71c6f53d00e974d05838f54bd66e3406dec8a3305811511c
- SSDEEP 3072:qWYs2Lu3IRoHT/3fFG3mkUPWI0n/5JrpXGP3yE1HSx+fF8Py6m9k4PGVoDNb:94L/aL6JplE1ygfD9kKAMNb
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Roaming\uieftds
- Size 261KB
- SHA256 7d4ed405992f3e2bddb0e4401eb3a1c1306474e09ee3b680f006d5967d12756e
- MD5 d928fd4d1871b145f8ac5e522cf4ee10
- SHA1 e508d3cf0c2bca37c0ecb7a415c2fe7ac5e5f3d3
- SHA512 c10bda22063354526ab630551ccf0403c0af7b9452965da992c1f140ea069d8d22cb01b88b478c0b71c6f53d00e974d05838f54bd66e3406dec8a3305811511c
- SSDEEP 3072:qWYs2Lu3IRoHT/3fFG3mkUPWI0n/5JrpXGP3yE1HSx+fF8Py6m9k4PGVoDNb:94L/aL6JplE1ygfD9kKAMNb
- MD5 SHA1 SHA512 SSDEEP