2b4df35eda74a9f451226cd2b323808803adcc3788587f9de7307058e5fa3cb7

Analysis

max time kernel
150s
max time network
123s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
24-02-2024 06:47

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General

Target

a13649815e9792abf139875f03fe1e7b.exe
Size

44KB
MD5

a13649815e9792abf139875f03fe1e7b
SHA1

c3b40e87893ae6dac045c10ac401528d28b767f7
SHA256

2b4df35eda74a9f451226cd2b323808803adcc3788587f9de7307058e5fa3cb7
SHA512

e924f60965db437c522079f2b7ab430d447310a134a0b335c9307103516d21b7b42691f4e6ba6ecf9105e552d963d85dbb65ae75706304b2aafb7bb2dbff3e9e
SSDEEP

768:nhdPT33ZkuSdzL+XwFlVY/qCYJxhJGroZNeGMwTpnoSQoBGbF5HhD8zT/xQxCIEm:nDPquSdzQwFYSCYJxkoZNOwloSXBGbFJ

Score

10^/10

bootkit persistence spyware stealer

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "userinit.exeC:\\Users\\Admin\\AppData\\Roaming\\appconf32.exe,"	TSTheme.exe

Deletes itself 1 IoCs

pid	Process
2820	TSTheme.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

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

T1542.003

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

Modifies Internet Explorer Protected Mode 1 TTPs 1 IoCs

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-3452737119-3959686427-228443150-1000\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3\2500 = "3"	TSTheme.exe

Modifies Internet Explorer Protected Mode Banner 1 TTPs 1 IoCs

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-3452737119-3959686427-228443150-1000\Software\Microsoft\Internet Explorer\Main\NoProtectedModeBanner = "1"	TSTheme.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3452737119-3959686427-228443150-1000\Software\Microsoft\Internet Explorer\Main	TSTheme.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2848	a13649815e9792abf139875f03fe1e7b.exe
2848	a13649815e9792abf139875f03fe1e7b.exe
2848	a13649815e9792abf139875f03fe1e7b.exe
2848	a13649815e9792abf139875f03fe1e7b.exe
2848	a13649815e9792abf139875f03fe1e7b.exe
2848	a13649815e9792abf139875f03fe1e7b.exe
2848	a13649815e9792abf139875f03fe1e7b.exe
2848	a13649815e9792abf139875f03fe1e7b.exe
2848	a13649815e9792abf139875f03fe1e7b.exe
2848	a13649815e9792abf139875f03fe1e7b.exe
2848	a13649815e9792abf139875f03fe1e7b.exe
2848	a13649815e9792abf139875f03fe1e7b.exe
2848	a13649815e9792abf139875f03fe1e7b.exe
2848	a13649815e9792abf139875f03fe1e7b.exe
2848	a13649815e9792abf139875f03fe1e7b.exe
2848	a13649815e9792abf139875f03fe1e7b.exe
2848	a13649815e9792abf139875f03fe1e7b.exe
2848	a13649815e9792abf139875f03fe1e7b.exe
2848	a13649815e9792abf139875f03fe1e7b.exe
2848	a13649815e9792abf139875f03fe1e7b.exe
2848	a13649815e9792abf139875f03fe1e7b.exe
2848	a13649815e9792abf139875f03fe1e7b.exe
2848	a13649815e9792abf139875f03fe1e7b.exe
2848	a13649815e9792abf139875f03fe1e7b.exe
2848	a13649815e9792abf139875f03fe1e7b.exe
2848	a13649815e9792abf139875f03fe1e7b.exe
2848	a13649815e9792abf139875f03fe1e7b.exe
2820	TSTheme.exe
2820	TSTheme.exe
2820	TSTheme.exe
2820	TSTheme.exe
2820	TSTheme.exe
2820	TSTheme.exe
2820	TSTheme.exe
2820	TSTheme.exe
2820	TSTheme.exe
2820	TSTheme.exe
2820	TSTheme.exe
2820	TSTheme.exe
2820	TSTheme.exe
2820	TSTheme.exe
2820	TSTheme.exe
2820	TSTheme.exe
2820	TSTheme.exe
2820	TSTheme.exe
2820	TSTheme.exe
2820	TSTheme.exe
2820	TSTheme.exe
2820	TSTheme.exe
2820	TSTheme.exe
2820	TSTheme.exe
2820	TSTheme.exe
2820	TSTheme.exe
2820	TSTheme.exe
2820	TSTheme.exe
2820	TSTheme.exe
2820	TSTheme.exe
2820	TSTheme.exe
2820	TSTheme.exe
2820	TSTheme.exe
2820	TSTheme.exe
2820	TSTheme.exe
2820	TSTheme.exe
2820	TSTheme.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2848 wrote to memory of 2820	2848	a13649815e9792abf139875f03fe1e7b.exe	28
PID 2848 wrote to memory of 2820	2848	a13649815e9792abf139875f03fe1e7b.exe	28
PID 2848 wrote to memory of 2820	2848	a13649815e9792abf139875f03fe1e7b.exe	28
PID 2848 wrote to memory of 2820	2848	a13649815e9792abf139875f03fe1e7b.exe	28
PID 2848 wrote to memory of 2820	2848	a13649815e9792abf139875f03fe1e7b.exe	28
PID 2848 wrote to memory of 2820	2848	a13649815e9792abf139875f03fe1e7b.exe	28
PID 2848 wrote to memory of 2820	2848	a13649815e9792abf139875f03fe1e7b.exe	28

C:\Users\Admin\AppData\Local\Temp\a13649815e9792abf139875f03fe1e7b.exe
"C:\Users\Admin\AppData\Local\Temp\a13649815e9792abf139875f03fe1e7b.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2848
- C:\Windows\SysWOW64\TSTheme.exe
  C:\Windows\system32\TSTheme.exe
  2⤵
  - Modifies WinLogon for persistence
  - Deletes itself
  - Writes to the Master Boot Record (MBR)
  - Modifies Internet Explorer Protected Mode
  - Modifies Internet Explorer Protected Mode Banner
  - Modifies Internet Explorer settings
  - Suspicious behavior: EnumeratesProcesses
  PID:2820

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Winlogon Helper DLL

T1547.004

Pre-OS Boot

T1542

Bootkit

T1542.003

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Winlogon Helper DLL

T1547.004

Defense Evasion

Modify Registry

T1112

Pre-OS Boot

T1542

Bootkit

T1542.003

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/2820-1-0x0000000000290000-0x000000000029D000-memory.dmp

Filesize
52KB

Download
memory/2820-2-0x0000000000290000-0x000000000029D000-memory.dmp

Filesize
52KB

Download
memory/2820-4-0x0000000000290000-0x000000000029D000-memory.dmp

Filesize
52KB

Download
memory/2820-6-0x0000000000290000-0x000000000029D000-memory.dmp

Filesize
52KB

Download
memory/2820-8-0x000000007764F000-0x0000000077650000-memory.dmp

Filesize
4KB

Download
memory/2820-7-0x0000000076450000-0x0000000076560000-memory.dmp

Filesize
1.1MB

Download
memory/2820-12-0x0000000000290000-0x000000000029D000-memory.dmp

Filesize
52KB

Download
memory/2820-17-0x0000000000290000-0x000000000029D000-memory.dmp

Filesize
52KB

Download
memory/2848-0-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

Download
memory/2848-3-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

Download