d4c2c7795496056ece8e0de136ae63b316508f15bfa28582ceafbb190abfd790

General

Target

YKBGunlukEkstre.exe
Size

445KB
MD5

020a647bece9a854fab2e6e544de336b
SHA1

8d9b566018fec73fb4dc5ac9cfcb7bb505ebf67f
SHA256

d4c2c7795496056ece8e0de136ae63b316508f15bfa28582ceafbb190abfd790
SHA512

11e6cab89acf2730f24541d33ec01d1c4ded2960522d87e844427d38785a1fc7800569c4e174acae4e2fbd7880235ca6c42c20ca323c4607a17bbbf293ff76fb

Score

9^/10

evasion trojan

Malware Config

Signatures

Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

1088 cmd.exe
Suspicious use of SendNotifyMessage 4 IoCs

Processes:

Explorer.EXE

pid process

1264 Explorer.EXE
1264 Explorer.EXE
1264 Explorer.EXE
1264 Explorer.EXE

pid	process
1088	cmd.exe

pid	process
1264	Explorer.EXE
1264	Explorer.EXE
1264	Explorer.EXE
1264	Explorer.EXE

Checks BIOS information in registry 2 TTPs 2 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

YKBGunlukEkstre.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	YKBGunlukEkstre.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	YKBGunlukEkstre.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

YKBGunlukEkstre.exeExplorer.EXEcscript.exe

description	pid	process	target process
PID 1100 wrote to memory of 912	1100	YKBGunlukEkstre.exe	YKBGunlukEkstre.exe
PID 1100 wrote to memory of 912	1100	YKBGunlukEkstre.exe	YKBGunlukEkstre.exe
PID 1100 wrote to memory of 912	1100	YKBGunlukEkstre.exe	YKBGunlukEkstre.exe
PID 1100 wrote to memory of 912	1100	YKBGunlukEkstre.exe	YKBGunlukEkstre.exe
PID 1100 wrote to memory of 912	1100	YKBGunlukEkstre.exe	YKBGunlukEkstre.exe
PID 1100 wrote to memory of 912	1100	YKBGunlukEkstre.exe	YKBGunlukEkstre.exe
PID 1100 wrote to memory of 912	1100	YKBGunlukEkstre.exe	YKBGunlukEkstre.exe
PID 1264 wrote to memory of 308	1264	Explorer.EXE	cscript.exe
PID 1264 wrote to memory of 308	1264	Explorer.EXE	cscript.exe
PID 1264 wrote to memory of 308	1264	Explorer.EXE	cscript.exe
PID 1264 wrote to memory of 308	1264	Explorer.EXE	cscript.exe
PID 308 wrote to memory of 1088	308	cscript.exe	cmd.exe
PID 308 wrote to memory of 1088	308	cscript.exe	cmd.exe
PID 308 wrote to memory of 1088	308	cscript.exe	cmd.exe
PID 308 wrote to memory of 1088	308	cscript.exe	cmd.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

YKBGunlukEkstre.exeYKBGunlukEkstre.execscript.exe

description	pid	process	target process
PID 1100 set thread context of 912	1100	YKBGunlukEkstre.exe	YKBGunlukEkstre.exe
PID 912 set thread context of 1264	912	YKBGunlukEkstre.exe	Explorer.EXE
PID 308 set thread context of 1264	308	cscript.exe	Explorer.EXE

Suspicious behavior: EnumeratesProcesses 23 IoCs

Processes:

YKBGunlukEkstre.execscript.exe

pid	process
912	YKBGunlukEkstre.exe
912	YKBGunlukEkstre.exe
308	cscript.exe
308	cscript.exe
308	cscript.exe
308	cscript.exe
308	cscript.exe
308	cscript.exe
308	cscript.exe
308	cscript.exe
308	cscript.exe
308	cscript.exe
308	cscript.exe
308	cscript.exe
308	cscript.exe
308	cscript.exe
308	cscript.exe
308	cscript.exe
308	cscript.exe
308	cscript.exe
308	cscript.exe
308	cscript.exe
308	cscript.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

YKBGunlukEkstre.execscript.exe

description pid process

Token: SeDebugPrivilege 912 YKBGunlukEkstre.exe
Token: SeDebugPrivilege 308 cscript.exe
Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

YKBGunlukEkstre.execscript.exe

pid process

912 YKBGunlukEkstre.exe
912 YKBGunlukEkstre.exe
912 YKBGunlukEkstre.exe
308 cscript.exe
308 cscript.exe
Looks for VirtualBox Guest Additions in registry 2 TTPs 1 IoCs

Query Registry
T1012

System Information Discovery
T1082

Processes:

YKBGunlukEkstre.exe

description ioc process

Key opened \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Oracle\VirtualBox Guest Additions YKBGunlukEkstre.exe
Looks for VMWare Tools registry key 2 TTPs 1 IoCs

Query Registry
T1012

System Information Discovery
T1082

Processes:

YKBGunlukEkstre.exe

description ioc process

Key opened \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\VMware, Inc.\VMware Tools YKBGunlukEkstre.exe

description	pid	process
Token: SeDebugPrivilege	912	YKBGunlukEkstre.exe
Token: SeDebugPrivilege	308	cscript.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Oracle\VirtualBox Guest Additions	YKBGunlukEkstre.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\VMware, Inc.\VMware Tools	YKBGunlukEkstre.exe

Maps connected drives based on registry 3 TTPs 2 IoCs

Disk information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Processes:

YKBGunlukEkstre.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	YKBGunlukEkstre.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	YKBGunlukEkstre.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs
evasion trojan

System Information Discovery
T1082

Processes:

Explorer.EXE

description ioc process

Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA Explorer.EXE
Suspicious use of FindShellTrayWindow 5 IoCs

Processes:

Explorer.EXE

pid process

1264 Explorer.EXE
1264 Explorer.EXE
1264 Explorer.EXE
1264 Explorer.EXE
1264 Explorer.EXE

description	ioc	process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	Explorer.EXE

pid	process
1264	Explorer.EXE
1264	Explorer.EXE
1264	Explorer.EXE
1264	Explorer.EXE
1264	Explorer.EXE

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
- Checks whether UAC is enabled
- Suspicious use of FindShellTrayWindow
PID:1264

C:\Users\Admin\AppData\Local\Temp\YKBGunlukEkstre.exe
"C:\Users\Admin\AppData\Local\Temp\YKBGunlukEkstre.exe"
2⤵
- Checks BIOS information in registry
- Suspicious use of WriteProcessMemory
- Suspicious use of SetThreadContext
- Looks for VirtualBox Guest Additions in registry
- Looks for VMWare Tools registry key
- Maps connected drives based on registry
PID:1100

C:\Users\Admin\AppData\Local\Temp\YKBGunlukEkstre.exe
"{path}"
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious behavior: MapViewOfSection
PID:912

C:\Windows\SysWOW64\cscript.exe
"C:\Windows\SysWOW64\cscript.exe"
2⤵
- Suspicious use of WriteProcessMemory
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious behavior: MapViewOfSection
PID:308

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\YKBGunlukEkstre.exe"
3⤵
- Deletes itself
PID:1088

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

5

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/308-2-0x0000000000000000-mapping.dmp

Download
memory/308-3-0x0000000000020000-0x0000000000042000-memory.dmp

Filesize
136KB

Download
memory/308-5-0x0000000003080000-0x0000000003184000-memory.dmp

Filesize
1.0MB

Download
memory/912-0-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download
memory/912-1-0x000000000041E2F0-mapping.dmp

Download
memory/1088-4-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads