Analysis
- max time kernel
149s - max time network
152s - platform
windows10_x64 - resource
win10v20201028 - submitted
01/01/2021, 07:33
Static task
static1
Behavioral task
behavioral1
Sample
b05ef332fdb673343ef00b7d017fa637.exe
Resource
win7v20201028
windows7_x64
0 signatures
0 seconds
Behavioral task
behavioral2
Sample
b05ef332fdb673343ef00b7d017fa637.exe
Resource
win10v20201028
windows10_x64
0 signatures
0 seconds
General
- Target b05ef332fdb673343ef00b7d017fa637.exe
- Size 4.7MB
- Sample210101-94yphpggle
- SHA256 a4053c9427fa00b62f65abf8ad7760e39df7f7ea0c72ed89375e2076f7cb79a3
- MD5 b05ef332fdb673343ef00b7d017fa637
- SHA1 95ce92fd3ecab7d8d5d3dfbaba3b825c31c5c1c1
- SHA512 a83ac61a445b2cae84587619e16bc0414472ba4639115cc361c3c209744a4c6688e48aaa5a8881648a5fb424cfb1bb25e88b18bedb6fb85075837be6a1e4a303
- MD5 SHA1 SHA512
Score
8/10
Malware Config
Signatures
- Drops file in Drivers directory 1 IoCs
description ioc Process File created C:\Windows\System32\drivers\QAssist.sys Stlmn.exe - Executes dropped EXE 3 IoCs
pid Process 1820 lsass.exe 1704 Stlmn.exe 2792 Stlmn.exe - Sets service image path in registry 2 TTPs
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resource yara_rule behavioral2/memory/4040-2-0x0000000010000000-0x000000001003E000-memory.dmp upx behavioral2/memory/1820-6-0x0000000010000000-0x00000000101BA000-memory.dmp upx behavioral2/memory/1704-9-0x0000000010000000-0x00000000101BA000-memory.dmp upx - Enumerates connected drives 3 TTPs 23 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
description ioc Process File opened (read-only) \??\U: Stlmn.exe File opened (read-only) \??\V: Stlmn.exe File opened (read-only) \??\X: Stlmn.exe File opened (read-only) \??\Y: Stlmn.exe File opened (read-only) \??\B: Stlmn.exe File opened (read-only) \??\H: Stlmn.exe File opened (read-only) \??\J: Stlmn.exe File opened (read-only) \??\K: Stlmn.exe File opened (read-only) \??\L: Stlmn.exe File opened (read-only) \??\M: Stlmn.exe File opened (read-only) \??\P: Stlmn.exe File opened (read-only) \??\Q: Stlmn.exe File opened (read-only) \??\G: Stlmn.exe File opened (read-only) \??\I: Stlmn.exe File opened (read-only) \??\Z: Stlmn.exe File opened (read-only) \??\N: Stlmn.exe File opened (read-only) \??\O: Stlmn.exe File opened (read-only) \??\S: Stlmn.exe File opened (read-only) \??\T: Stlmn.exe File opened (read-only) \??\E: Stlmn.exe File opened (read-only) \??\F: Stlmn.exe File opened (read-only) \??\R: Stlmn.exe File opened (read-only) \??\W: Stlmn.exe - Drops file in System32 directory 2 IoCs
description ioc Process File created C:\Windows\SysWOW64\Stlmn.exe lsass.exe File opened for modification C:\Windows\SysWOW64\Stlmn.exe lsass.exe - Drops file in Windows directory 2 IoCs
description ioc Process File created C:\Windows\lsass.exe b05ef332fdb673343ef00b7d017fa637.exe File opened for modification C:\Windows\lsass.exe lsass.exe - Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
description ioc Process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 Stlmn.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz Stlmn.exe - Modifies data under HKEY_USERS 5 IoCs
description ioc Process Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\ActiveMovie Stlmn.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\ActiveMovie\devenum\Version = "7" Stlmn.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\ActiveMovie\devenum Stlmn.exe Key created \REGISTRY\USER\.DEFAULT\Software Stlmn.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft Stlmn.exe - Runs ping.exe 1 TTPs 1 IoCs
pid Process 3376 PING.EXE - Suspicious behavior: EnumeratesProcesses 198 IoCs
pid Process 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe 2792 Stlmn.exe - Suspicious behavior: LoadsDriver 1 IoCs
pid Process 2792 Stlmn.exe - Suspicious use of AdjustPrivilegeToken 6 IoCs
description pid Process Token: SeIncBasePriorityPrivilege 1820 lsass.exe Token: SeLoadDriverPrivilege 2792 Stlmn.exe Token: 33 2792 Stlmn.exe Token: SeIncBasePriorityPrivilege 2792 Stlmn.exe Token: 33 2792 Stlmn.exe Token: SeIncBasePriorityPrivilege 2792 Stlmn.exe - Suspicious use of SetWindowsHookEx 3 IoCs
pid Process 4040 b05ef332fdb673343ef00b7d017fa637.exe 4040 b05ef332fdb673343ef00b7d017fa637.exe 4040 b05ef332fdb673343ef00b7d017fa637.exe - Suspicious use of WriteProcessMemory 12 IoCs
description pid Process procid_target PID 4040 wrote to memory of 1820 4040 b05ef332fdb673343ef00b7d017fa637.exe 74 PID 4040 wrote to memory of 1820 4040 b05ef332fdb673343ef00b7d017fa637.exe 74 PID 4040 wrote to memory of 1820 4040 b05ef332fdb673343ef00b7d017fa637.exe 74 PID 1820 wrote to memory of 2484 1820 lsass.exe 77 PID 1820 wrote to memory of 2484 1820 lsass.exe 77 PID 1820 wrote to memory of 2484 1820 lsass.exe 77 PID 1704 wrote to memory of 2792 1704 Stlmn.exe 78 PID 1704 wrote to memory of 2792 1704 Stlmn.exe 78 PID 1704 wrote to memory of 2792 1704 Stlmn.exe 78 PID 2484 wrote to memory of 3376 2484 cmd.exe 80 PID 2484 wrote to memory of 3376 2484 cmd.exe 80 PID 2484 wrote to memory of 3376 2484 cmd.exe 80
Processes
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C:\Users\Admin\AppData\Local\Temp\b05ef332fdb673343ef00b7d017fa637.exe"C:\Users\Admin\AppData\Local\Temp\b05ef332fdb673343ef00b7d017fa637.exe"1⤵
- Drops file in Windows directory
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4040 -
C:\Windows\lsass.exeC:\Windows\lsass.exe2⤵
- Executes dropped EXE
- Drops file in System32 directory
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1820 -
C:\Windows\SysWOW64\cmd.exeC:\Windows\system32\cmd.exe /c ping -n 2 127.0.0.1 > nul && del C:\Windows\lsass.exe > nul3⤵
- Suspicious use of WriteProcessMemory
PID:2484 -
C:\Windows\SysWOW64\PING.EXEping -n 2 127.0.0.14⤵
- Runs ping.exe
PID:3376
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C:\Windows\SysWOW64\Stlmn.exeC:\Windows\SysWOW64\Stlmn.exe -auto1⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:1704 -
C:\Windows\SysWOW64\Stlmn.exeC:\Windows\SysWOW64\Stlmn.exe -acsi2⤵
- Drops file in Drivers directory
- Executes dropped EXE
- Enumerates connected drives
- Checks processor information in registry
- Modifies data under HKEY_USERS
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: LoadsDriver
- Suspicious use of AdjustPrivilegeToken
PID:2792
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