899fc1da5a83ec8a1dcf1c15004e8ba450ce363dfa9896b6bcc7179fe2f0b8be

Analysis

max time kernel
150s
max time network
161s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
02/12/2022, 22:32

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General

Target

899fc1da5a83ec8a1dcf1c15004e8ba450ce363dfa9896b6bcc7179fe2f0b8be.exe
Size

2.2MB
MD5

949e1c654a86cc5f138fba8679479935
SHA1

6cdf816933857a44eb89d11a35ffdc48de169712
SHA256

899fc1da5a83ec8a1dcf1c15004e8ba450ce363dfa9896b6bcc7179fe2f0b8be
SHA512

1147c2cb6381b285be2a624ec311548e3589e3c82033e4006c9cb40a7cf4d5a33696978d352fe66165c5ff94f71fb7beadddc662418422b092c2afe7efa6e2e2
SSDEEP

24576:7n/LiLfc6C75KOfHT74FvTqlcLY169ezwakLzVnSMPxrhQeigzv+QX2XNbMY0vQq:L/ycPAFqlD69ezh4hZiWVqVev+ypZt

Score

8^/10

bootkit evasion persistence trojan

Malware Config

Signatures

Adds policy Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	899fc1da5a83ec8a1dcf1c15004e8ba450ce363dfa9896b6bcc7179fe2f0b8be.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\system = "C:\\Windows\\system32\\pics\\svchostt.exe"	899fc1da5a83ec8a1dcf1c15004e8ba450ce363dfa9896b6bcc7179fe2f0b8be.exe

Checks BIOS information in registry 2 TTPs 1 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	899fc1da5a83ec8a1dcf1c15004e8ba450ce363dfa9896b6bcc7179fe2f0b8be.exe

Identifies Wine through registry keys 2 TTPs 1 IoCs

Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Wine	899fc1da5a83ec8a1dcf1c15004e8ba450ce363dfa9896b6bcc7179fe2f0b8be.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	899fc1da5a83ec8a1dcf1c15004e8ba450ce363dfa9896b6bcc7179fe2f0b8be.exe

Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

Bootkits write to the MBR to gain persistence at a level below the operating system.

bootkit persistence

Bootkit

T1067

description	ioc	Process
File opened for modification	\??\PhysicalDrive0	899fc1da5a83ec8a1dcf1c15004e8ba450ce363dfa9896b6bcc7179fe2f0b8be.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\pics\svchostt.exe	899fc1da5a83ec8a1dcf1c15004e8ba450ce363dfa9896b6bcc7179fe2f0b8be.exe
File opened for modification	C:\Windows\SysWOW64\pics\svchostt.exe	899fc1da5a83ec8a1dcf1c15004e8ba450ce363dfa9896b6bcc7179fe2f0b8be.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
900	899fc1da5a83ec8a1dcf1c15004e8ba450ce363dfa9896b6bcc7179fe2f0b8be.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
900	899fc1da5a83ec8a1dcf1c15004e8ba450ce363dfa9896b6bcc7179fe2f0b8be.exe

C:\Users\Admin\AppData\Local\Temp\899fc1da5a83ec8a1dcf1c15004e8ba450ce363dfa9896b6bcc7179fe2f0b8be.exe
"C:\Users\Admin\AppData\Local\Temp\899fc1da5a83ec8a1dcf1c15004e8ba450ce363dfa9896b6bcc7179fe2f0b8be.exe"
1⤵
- Adds policy Run key to start application
- Checks BIOS information in registry
- Identifies Wine through registry keys
- Checks whether UAC is enabled
- Writes to the Master Boot Record (MBR)
- Drops file in System32 directory
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
PID:900

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Bootkit

T1067

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Virtualization/Sandbox Evasion

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/900-54-0x0000000000400000-0x00000000008B2000-memory.dmp

Filesize
4.7MB

Download
memory/900-55-0x0000000000400000-0x00000000008B2000-memory.dmp

Filesize
4.7MB

Download
memory/900-56-0x0000000000400000-0x00000000008B2000-memory.dmp

Filesize
4.7MB

Download
memory/900-57-0x0000000075141000-0x0000000075143000-memory.dmp

Filesize
8KB

Download
memory/900-58-0x0000000000400000-0x00000000008B2000-memory.dmp

Filesize
4.7MB

Download