tofsee | b473616b0f304d267ffb1744d642af6c12fe6de23156c7762c943d460dafd371

Analysis

max time kernel
146s
max time network
121s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
28-01-2025 17:31

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General

Target

2025-01-28_48aef0f0988a64f18348e4b39346e2ac_mafia.exe
Size

12.8MB
MD5

48aef0f0988a64f18348e4b39346e2ac
SHA1

0c97b84c07208aae8742fba4d6699185c19e247a
SHA256

b473616b0f304d267ffb1744d642af6c12fe6de23156c7762c943d460dafd371
SHA512

1554636eda69ba604915169212adb3d56bf634e5274e95a98d7df3b3426020a6437e9fd3ba36eefaf5bf93d682558ab03ea2fa1c01feb37ebf85a002c7760e67
SSDEEP

24576:mpomTTN9tttttttttttttttttttttttttttttttttttttttttttttttttttttttn:qoo

Score

10^/10

tofsee defense_evasion discovery execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

43.231.4.7

lazystax.ru

Signatures

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

Windows security bypass 2 TTPs 1 IoCs

defense_evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\SysWOW64\bvmlcaao = "0"	svchost.exe

Creates new service(s) 2 TTPs
persistence execution

Windows Service
T1543.003

Service Execution
T1569.002

Modifies Windows Firewall 2 TTPs 1 IoCs

defense_evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
2912	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\bvmlcaao\ImagePath = "C:\\Windows\\SysWOW64\\bvmlcaao\\viurkxcm.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2456	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2980	viurkxcm.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2980 set thread context of 2456	2980	viurkxcm.exe	42

Launches sc.exe 3 IoCs

Sc.exe is a Windows utlilty to control services on the system.

pid	Process
1336	sc.exe
2712	sc.exe
2848	sc.exe

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

System Information Discovery
T1082

Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

persistence privilege_escalation

Netsh Helper DLL

T1546.007

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh	netsh.exe
Key queried	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh	netsh.exe

System Location Discovery: System Language Discovery 1 TTPs 9 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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2025-01-28_48aef0f0988a64f18348e4b39346e2ac_mafia.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	viurkxcm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2164 wrote to memory of 2384	2164	2025-01-28_48aef0f0988a64f18348e4b39346e2ac_mafia.exe	31
PID 2164 wrote to memory of 2384	2164	2025-01-28_48aef0f0988a64f18348e4b39346e2ac_mafia.exe	31
PID 2164 wrote to memory of 2384	2164	2025-01-28_48aef0f0988a64f18348e4b39346e2ac_mafia.exe	31
PID 2164 wrote to memory of 2384	2164	2025-01-28_48aef0f0988a64f18348e4b39346e2ac_mafia.exe	31
PID 2164 wrote to memory of 1720	2164	2025-01-28_48aef0f0988a64f18348e4b39346e2ac_mafia.exe	33
PID 2164 wrote to memory of 1720	2164	2025-01-28_48aef0f0988a64f18348e4b39346e2ac_mafia.exe	33
PID 2164 wrote to memory of 1720	2164	2025-01-28_48aef0f0988a64f18348e4b39346e2ac_mafia.exe	33
PID 2164 wrote to memory of 1720	2164	2025-01-28_48aef0f0988a64f18348e4b39346e2ac_mafia.exe	33
PID 2164 wrote to memory of 1336	2164	2025-01-28_48aef0f0988a64f18348e4b39346e2ac_mafia.exe	35
PID 2164 wrote to memory of 1336	2164	2025-01-28_48aef0f0988a64f18348e4b39346e2ac_mafia.exe	35
PID 2164 wrote to memory of 1336	2164	2025-01-28_48aef0f0988a64f18348e4b39346e2ac_mafia.exe	35
PID 2164 wrote to memory of 1336	2164	2025-01-28_48aef0f0988a64f18348e4b39346e2ac_mafia.exe	35
PID 2164 wrote to memory of 2712	2164	2025-01-28_48aef0f0988a64f18348e4b39346e2ac_mafia.exe	37
PID 2164 wrote to memory of 2712	2164	2025-01-28_48aef0f0988a64f18348e4b39346e2ac_mafia.exe	37
PID 2164 wrote to memory of 2712	2164	2025-01-28_48aef0f0988a64f18348e4b39346e2ac_mafia.exe	37
PID 2164 wrote to memory of 2712	2164	2025-01-28_48aef0f0988a64f18348e4b39346e2ac_mafia.exe	37
PID 2164 wrote to memory of 2848	2164	2025-01-28_48aef0f0988a64f18348e4b39346e2ac_mafia.exe	39
PID 2164 wrote to memory of 2848	2164	2025-01-28_48aef0f0988a64f18348e4b39346e2ac_mafia.exe	39
PID 2164 wrote to memory of 2848	2164	2025-01-28_48aef0f0988a64f18348e4b39346e2ac_mafia.exe	39
PID 2164 wrote to memory of 2848	2164	2025-01-28_48aef0f0988a64f18348e4b39346e2ac_mafia.exe	39
PID 2980 wrote to memory of 2456	2980	viurkxcm.exe	42
PID 2980 wrote to memory of 2456	2980	viurkxcm.exe	42
PID 2980 wrote to memory of 2456	2980	viurkxcm.exe	42
PID 2980 wrote to memory of 2456	2980	viurkxcm.exe	42
PID 2980 wrote to memory of 2456	2980	viurkxcm.exe	42
PID 2980 wrote to memory of 2456	2980	viurkxcm.exe	42
PID 2164 wrote to memory of 2912	2164	2025-01-28_48aef0f0988a64f18348e4b39346e2ac_mafia.exe	43
PID 2164 wrote to memory of 2912	2164	2025-01-28_48aef0f0988a64f18348e4b39346e2ac_mafia.exe	43
PID 2164 wrote to memory of 2912	2164	2025-01-28_48aef0f0988a64f18348e4b39346e2ac_mafia.exe	43
PID 2164 wrote to memory of 2912	2164	2025-01-28_48aef0f0988a64f18348e4b39346e2ac_mafia.exe	43

C:\Users\Admin\AppData\Local\Temp\2025-01-28_48aef0f0988a64f18348e4b39346e2ac_mafia.exe
"C:\Users\Admin\AppData\Local\Temp\2025-01-28_48aef0f0988a64f18348e4b39346e2ac_mafia.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2164
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\bvmlcaao\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2384
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\viurkxcm.exe" C:\Windows\SysWOW64\bvmlcaao\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1720
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create bvmlcaao binPath= "C:\Windows\SysWOW64\bvmlcaao\viurkxcm.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-01-28_48aef0f0988a64f18348e4b39346e2ac_mafia.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1336
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description bvmlcaao "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2712
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start bvmlcaao
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2848
- C:\Windows\SysWOW64\netsh.exe
  "C:\Windows\System32\netsh.exe" advfirewall firewall add rule name="Host-process for services of Windows" dir=in action=allow program="C:\Windows\SysWOW64\svchost.exe" enable=yes>nul
  2⤵
  - Modifies Windows Firewall
  - Event Triggered Execution: Netsh Helper DLL
  - System Location Discovery: System Language Discovery
  PID:2912

C:\Windows\SysWOW64\bvmlcaao\viurkxcm.exe
C:\Windows\SysWOW64\bvmlcaao\viurkxcm.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-01-28_48aef0f0988a64f18348e4b39346e2ac_mafia.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2980
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Windows security bypass
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2456

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

T1569

Service Execution

T1569.002

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Defense Evasion

Impair Defenses

T1562

Disable or Modify System Firewall

T1562.004

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\viurkxcm.exe

Filesize
13.8MB

MD5
4cf5b450f6d07c997c1deeab9f2807c2

SHA1
dbdb3bca793d79b817d0d407c065c11a3d11ceab

SHA256
f0e6492164d17d20ebe15b9c462fc17a3f4c031bd762c3f83a64dc38f37af92e

SHA512
35bea69f933675bf6ed486f9e7acb2502f7b4e26804094600f03ca15f3f3b330244815913a05e62c6e3a4f6e92a30de379f5ad12076dc8aabec8faea74021187

Download Submit
memory/2164-1-0x00000000005C0000-0x00000000006C0000-memory.dmp

Filesize
1024KB

Download
memory/2164-4-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2164-3-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/2164-15-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2164-14-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/2456-11-0x0000000000100000-0x0000000000115000-memory.dmp

Filesize
84KB

Download
memory/2456-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2456-8-0x0000000000100000-0x0000000000115000-memory.dmp

Filesize
84KB

Download
memory/2456-16-0x0000000000100000-0x0000000000115000-memory.dmp

Filesize
84KB

Download
memory/2456-17-0x0000000000100000-0x0000000000115000-memory.dmp

Filesize
84KB

Download
memory/2980-12-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads