tofsee | 91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147

Analysis

max time kernel
92s
max time network
94s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
06-12-2024 23:56

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147.exe
Size

185KB
MD5

702a92ee66567914adb65b7148249d1f
SHA1

8fefbb1a949e11480385b0282a2c1c668ce9d353
SHA256

91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147
SHA512

2959749751c1111f088cdb223a680cb82d5375dbfa4051da75f8d844cbd6a0623c15b17db1c63c4371e952e938538a2b25cfac130b92d4360c69f77fd4016507
SSDEEP

3072:NeYyWAjeKlIYtJCLg2BWGzH6sugkr1fu73Gh5yv8Vmh:EYyWR10Yp0Kkxfs3D8sh

Score

10^/10

tofsee discovery persistence trojan

Malware Config

Extracted

Family

tofsee

64.20.54.234

rgtryhbgddtyh.biz

wertdghbyrukl.ch

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee
Tofsee family
tofsee

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation	91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147.exe

Executes dropped EXE 2 IoCs

pid	Process
4872	blthr.exe
3648	blthr.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MSConfig = "\"C:\\Users\\Admin\\blthr.exe\" /r"	91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 3256 set thread context of 1300	3256	91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147.exe	82
PID 4872 set thread context of 3648	4872	blthr.exe	84
PID 3648 set thread context of 2336	3648	blthr.exe	85

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3536	2336	WerFault.exe	85

System Location Discovery: System Language Discovery 1 TTPs 6 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	blthr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	blthr.exe

Suspicious use of WriteProcessMemory 29 IoCs

description	pid	Process	procid_target
PID 3256 wrote to memory of 1300	3256	91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147.exe	82
PID 3256 wrote to memory of 1300	3256	91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147.exe	82
PID 3256 wrote to memory of 1300	3256	91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147.exe	82
PID 3256 wrote to memory of 1300	3256	91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147.exe	82
PID 3256 wrote to memory of 1300	3256	91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147.exe	82
PID 3256 wrote to memory of 1300	3256	91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147.exe	82
PID 3256 wrote to memory of 1300	3256	91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147.exe	82
PID 3256 wrote to memory of 1300	3256	91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147.exe	82
PID 3256 wrote to memory of 1300	3256	91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147.exe	82
PID 1300 wrote to memory of 4872	1300	91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147.exe	83
PID 1300 wrote to memory of 4872	1300	91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147.exe	83
PID 1300 wrote to memory of 4872	1300	91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147.exe	83
PID 4872 wrote to memory of 3648	4872	blthr.exe	84
PID 4872 wrote to memory of 3648	4872	blthr.exe	84
PID 4872 wrote to memory of 3648	4872	blthr.exe	84
PID 4872 wrote to memory of 3648	4872	blthr.exe	84
PID 4872 wrote to memory of 3648	4872	blthr.exe	84
PID 4872 wrote to memory of 3648	4872	blthr.exe	84
PID 4872 wrote to memory of 3648	4872	blthr.exe	84
PID 4872 wrote to memory of 3648	4872	blthr.exe	84
PID 4872 wrote to memory of 3648	4872	blthr.exe	84
PID 3648 wrote to memory of 2336	3648	blthr.exe	85
PID 3648 wrote to memory of 2336	3648	blthr.exe	85
PID 3648 wrote to memory of 2336	3648	blthr.exe	85
PID 3648 wrote to memory of 2336	3648	blthr.exe	85
PID 3648 wrote to memory of 2336	3648	blthr.exe	85
PID 1300 wrote to memory of 3232	1300	91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147.exe	88
PID 1300 wrote to memory of 3232	1300	91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147.exe	88
PID 1300 wrote to memory of 3232	1300	91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147.exe	88

C:\Users\Admin\AppData\Local\Temp\91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147.exe
"C:\Users\Admin\AppData\Local\Temp\91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3256
- C:\Users\Admin\AppData\Local\Temp\91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147.exe
  "C:\Users\Admin\AppData\Local\Temp\91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1300
- - C:\Users\Admin\blthr.exe
    "C:\Users\Admin\blthr.exe" /r
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:4872
  - - C:\Users\Admin\blthr.exe
      "C:\Users\Admin\blthr.exe" /r
      4⤵
      Executes dropped EXE
      Suspicious use of SetThreadContext
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:3648
    - - C:\Windows\SysWOW64\svchost.exe
        
        svchost.exe
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:2336
      - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 2336 -s 320
        6⤵
        Program crash
        
        PID:3536
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\5766.bat" "
    3⤵
    - System Location Discovery: System Language Discovery
    PID:3232

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 2336 -ip 2336
1⤵
PID:5020

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\5766.bat

Filesize
135B

MD5
2731052e1a5e17ae017667f8feecc5e6

SHA1
7b4cee1fa1f15fbff273b75233796b2123460cbe

SHA256
41e4e424c259b18c41b00875f2530e634441f5e7489a23ba0100cc7620afd90d

SHA512
f64db7bf232d176e9fcca730c3bf866f0fd8a0db70f820d431d04a23af6053cfdf47913810babea3c55af7ea2b4b0eb02b2653d471b71e7cccd32c45b746273b

Download Submit
C:\Users\Admin\blthr.exe

Filesize
185KB

MD5
702a92ee66567914adb65b7148249d1f

SHA1
8fefbb1a949e11480385b0282a2c1c668ce9d353

SHA256
91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147

SHA512
2959749751c1111f088cdb223a680cb82d5375dbfa4051da75f8d844cbd6a0623c15b17db1c63c4371e952e938538a2b25cfac130b92d4360c69f77fd4016507

Download Submit
memory/1300-0-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1300-2-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1300-23-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/2336-13-0x00000000005A0000-0x00000000005C6000-memory.dmp

Filesize
152KB

Download
memory/2336-18-0x00000000005A0000-0x00000000005C6000-memory.dmp

Filesize
152KB

Download
memory/2336-27-0x00000000005A0000-0x00000000005C6000-memory.dmp

Filesize
152KB

Download
memory/2336-28-0x0000000000EA0000-0x0000000000EA1000-memory.dmp

Filesize
4KB

Download
memory/2336-29-0x00000000005A0000-0x00000000005C6000-memory.dmp

Filesize
152KB

Download
memory/2336-30-0x00000000005A0000-0x00000000005C6000-memory.dmp

Filesize
152KB

Download
memory/3648-12-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads