Analysis
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max time kernel
300s -
max time network
256s -
platform
windows10-1703_x64 -
resource
win10-20230915-en -
resource tags
arch:x64arch:x86image:win10-20230915-enlocale:en-usos:windows10-1703-x64system -
submitted
16/09/2023, 04:48
Static task
static1
Behavioral task
behavioral1
Sample
a3f12a86956b46caf03b7ab7a7802dc4e6f63d62f2983c9e5fa4b12983525b50.exe
Resource
win7-20230831-en
Behavioral task
behavioral2
Sample
a3f12a86956b46caf03b7ab7a7802dc4e6f63d62f2983c9e5fa4b12983525b50.exe
Resource
win10-20230915-en
General
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Target
a3f12a86956b46caf03b7ab7a7802dc4e6f63d62f2983c9e5fa4b12983525b50.exe
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Size
272KB
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MD5
5ee48fa6fdc554fbacbbc9b66da4f2aa
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SHA1
006f3580e833bc5e965ddc5cf4593396c96031dc
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SHA256
a3f12a86956b46caf03b7ab7a7802dc4e6f63d62f2983c9e5fa4b12983525b50
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SHA512
21f184ab5a541611f7342c6823addcd37a28aef72956b87874e3ee1631b9212fe5afac9f2b8d744b6d04170c8381a79d5c0500a31a454f08cdd1469f904e07fe
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SSDEEP
3072:AQvRg2YvVcjtvEKny84ccbqvPZg7UCmiMiG6Cb/V0KNMGNDn:dvwvVcjt8KnyXbqvPZg7gIJ8VBL
Malware Config
Extracted
smokeloader
pub1
Extracted
smokeloader
2020
http://host-file-host6.com/
http://host-host-file8.com/
Signatures
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SmokeLoader
Modular backdoor trojan in use since 2014.
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Deletes itself 1 IoCs
pid Process 2832 Process not Found -
Executes dropped EXE 2 IoCs
pid Process 4480 ctwvahc 1268 ctwvahc -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 784 set thread context of 4124 784 a3f12a86956b46caf03b7ab7a7802dc4e6f63d62f2983c9e5fa4b12983525b50.exe 70 PID 4480 set thread context of 1268 4480 ctwvahc 72 -
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 a3f12a86956b46caf03b7ab7a7802dc4e6f63d62f2983c9e5fa4b12983525b50.exe Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI a3f12a86956b46caf03b7ab7a7802dc4e6f63d62f2983c9e5fa4b12983525b50.exe Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI a3f12a86956b46caf03b7ab7a7802dc4e6f63d62f2983c9e5fa4b12983525b50.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI ctwvahc Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI ctwvahc Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI ctwvahc -
Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 4124 a3f12a86956b46caf03b7ab7a7802dc4e6f63d62f2983c9e5fa4b12983525b50.exe 4124 a3f12a86956b46caf03b7ab7a7802dc4e6f63d62f2983c9e5fa4b12983525b50.exe 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found 2832 Process not Found -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
pid Process 2832 Process not Found -
Suspicious behavior: MapViewOfSection 2 IoCs
pid Process 4124 a3f12a86956b46caf03b7ab7a7802dc4e6f63d62f2983c9e5fa4b12983525b50.exe 1268 ctwvahc -
Suspicious use of AdjustPrivilegeToken 4 IoCs
description pid Process Token: SeShutdownPrivilege 2832 Process not Found Token: SeCreatePagefilePrivilege 2832 Process not Found Token: SeShutdownPrivilege 2832 Process not Found Token: SeCreatePagefilePrivilege 2832 Process not Found -
Suspicious use of WriteProcessMemory 12 IoCs
description pid Process procid_target PID 784 wrote to memory of 4124 784 a3f12a86956b46caf03b7ab7a7802dc4e6f63d62f2983c9e5fa4b12983525b50.exe 70 PID 784 wrote to memory of 4124 784 a3f12a86956b46caf03b7ab7a7802dc4e6f63d62f2983c9e5fa4b12983525b50.exe 70 PID 784 wrote to memory of 4124 784 a3f12a86956b46caf03b7ab7a7802dc4e6f63d62f2983c9e5fa4b12983525b50.exe 70 PID 784 wrote to memory of 4124 784 a3f12a86956b46caf03b7ab7a7802dc4e6f63d62f2983c9e5fa4b12983525b50.exe 70 PID 784 wrote to memory of 4124 784 a3f12a86956b46caf03b7ab7a7802dc4e6f63d62f2983c9e5fa4b12983525b50.exe 70 PID 784 wrote to memory of 4124 784 a3f12a86956b46caf03b7ab7a7802dc4e6f63d62f2983c9e5fa4b12983525b50.exe 70 PID 4480 wrote to memory of 1268 4480 ctwvahc 72 PID 4480 wrote to memory of 1268 4480 ctwvahc 72 PID 4480 wrote to memory of 1268 4480 ctwvahc 72 PID 4480 wrote to memory of 1268 4480 ctwvahc 72 PID 4480 wrote to memory of 1268 4480 ctwvahc 72 PID 4480 wrote to memory of 1268 4480 ctwvahc 72 -
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
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C:\Users\Admin\AppData\Local\Temp\a3f12a86956b46caf03b7ab7a7802dc4e6f63d62f2983c9e5fa4b12983525b50.exe"C:\Users\Admin\AppData\Local\Temp\a3f12a86956b46caf03b7ab7a7802dc4e6f63d62f2983c9e5fa4b12983525b50.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:784 -
C:\Users\Admin\AppData\Local\Temp\a3f12a86956b46caf03b7ab7a7802dc4e6f63d62f2983c9e5fa4b12983525b50.exe"C:\Users\Admin\AppData\Local\Temp\a3f12a86956b46caf03b7ab7a7802dc4e6f63d62f2983c9e5fa4b12983525b50.exe"2⤵
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
PID:4124
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C:\Users\Admin\AppData\Roaming\ctwvahcC:\Users\Admin\AppData\Roaming\ctwvahc1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4480 -
C:\Users\Admin\AppData\Roaming\ctwvahcC:\Users\Admin\AppData\Roaming\ctwvahc2⤵
- Executes dropped EXE
- Checks SCSI registry key(s)
- Suspicious behavior: MapViewOfSection
PID:1268
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
272KB
MD55ee48fa6fdc554fbacbbc9b66da4f2aa
SHA1006f3580e833bc5e965ddc5cf4593396c96031dc
SHA256a3f12a86956b46caf03b7ab7a7802dc4e6f63d62f2983c9e5fa4b12983525b50
SHA51221f184ab5a541611f7342c6823addcd37a28aef72956b87874e3ee1631b9212fe5afac9f2b8d744b6d04170c8381a79d5c0500a31a454f08cdd1469f904e07fe
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Filesize
272KB
MD55ee48fa6fdc554fbacbbc9b66da4f2aa
SHA1006f3580e833bc5e965ddc5cf4593396c96031dc
SHA256a3f12a86956b46caf03b7ab7a7802dc4e6f63d62f2983c9e5fa4b12983525b50
SHA51221f184ab5a541611f7342c6823addcd37a28aef72956b87874e3ee1631b9212fe5afac9f2b8d744b6d04170c8381a79d5c0500a31a454f08cdd1469f904e07fe
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Filesize
272KB
MD55ee48fa6fdc554fbacbbc9b66da4f2aa
SHA1006f3580e833bc5e965ddc5cf4593396c96031dc
SHA256a3f12a86956b46caf03b7ab7a7802dc4e6f63d62f2983c9e5fa4b12983525b50
SHA51221f184ab5a541611f7342c6823addcd37a28aef72956b87874e3ee1631b9212fe5afac9f2b8d744b6d04170c8381a79d5c0500a31a454f08cdd1469f904e07fe