tofsee | 03dcd9a4ca3d6cbe61a3cdf5684649233e6036a584ed389739088adf58530998

Analysis

max time kernel
144s
max time network
120s
platform
windows7_x64
resource
win7-20241023-en
resource tags

arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-x64system
submitted
03-02-2025 21:08

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General

Target

2025-02-03_4858645e5dfe2b3c29b52ad93c9a0167_mafia.exe
Size

13.4MB
MD5

4858645e5dfe2b3c29b52ad93c9a0167
SHA1

3a33f59845824f55e75501dcc58fe9db7510bb21
SHA256

03dcd9a4ca3d6cbe61a3cdf5684649233e6036a584ed389739088adf58530998
SHA512

591a17c10b1dd9563f8d0d9372cd3a575196b8f84738a4b0087e78e62f3f704364132e2aeee1bd2fab494ca09b3a131835e369ab3b214edee3f2e6996083d23d
SSDEEP

3072:NLBgXOXcdW8tar7vGdq8c7YMl2b8anmMXnb58XuDP9het3Zv1oSW1za2E+w5C2/Y:QOMdRQr7OB0ypmMXnl8XEPM3noSWOC

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\tkjgyjsl = "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
2868	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\tkjgyjsl\ImagePath = "C:\\Windows\\SysWOW64\\tkjgyjsl\\yxlnbyzr.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2940	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2816	yxlnbyzr.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2816 set thread context of 2940	2816	yxlnbyzr.exe	41

Launches sc.exe 3 IoCs

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

pid	Process
2484	sc.exe
2476	sc.exe
3048	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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2025-02-03_4858645e5dfe2b3c29b52ad93c9a0167_mafia.exe
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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	yxlnbyzr.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2128 wrote to memory of 1048	2128	2025-02-03_4858645e5dfe2b3c29b52ad93c9a0167_mafia.exe	30
PID 2128 wrote to memory of 1048	2128	2025-02-03_4858645e5dfe2b3c29b52ad93c9a0167_mafia.exe	30
PID 2128 wrote to memory of 1048	2128	2025-02-03_4858645e5dfe2b3c29b52ad93c9a0167_mafia.exe	30
PID 2128 wrote to memory of 1048	2128	2025-02-03_4858645e5dfe2b3c29b52ad93c9a0167_mafia.exe	30
PID 2128 wrote to memory of 2320	2128	2025-02-03_4858645e5dfe2b3c29b52ad93c9a0167_mafia.exe	32
PID 2128 wrote to memory of 2320	2128	2025-02-03_4858645e5dfe2b3c29b52ad93c9a0167_mafia.exe	32
PID 2128 wrote to memory of 2320	2128	2025-02-03_4858645e5dfe2b3c29b52ad93c9a0167_mafia.exe	32
PID 2128 wrote to memory of 2320	2128	2025-02-03_4858645e5dfe2b3c29b52ad93c9a0167_mafia.exe	32
PID 2128 wrote to memory of 2484	2128	2025-02-03_4858645e5dfe2b3c29b52ad93c9a0167_mafia.exe	34
PID 2128 wrote to memory of 2484	2128	2025-02-03_4858645e5dfe2b3c29b52ad93c9a0167_mafia.exe	34
PID 2128 wrote to memory of 2484	2128	2025-02-03_4858645e5dfe2b3c29b52ad93c9a0167_mafia.exe	34
PID 2128 wrote to memory of 2484	2128	2025-02-03_4858645e5dfe2b3c29b52ad93c9a0167_mafia.exe	34
PID 2128 wrote to memory of 2476	2128	2025-02-03_4858645e5dfe2b3c29b52ad93c9a0167_mafia.exe	36
PID 2128 wrote to memory of 2476	2128	2025-02-03_4858645e5dfe2b3c29b52ad93c9a0167_mafia.exe	36
PID 2128 wrote to memory of 2476	2128	2025-02-03_4858645e5dfe2b3c29b52ad93c9a0167_mafia.exe	36
PID 2128 wrote to memory of 2476	2128	2025-02-03_4858645e5dfe2b3c29b52ad93c9a0167_mafia.exe	36
PID 2128 wrote to memory of 3048	2128	2025-02-03_4858645e5dfe2b3c29b52ad93c9a0167_mafia.exe	38
PID 2128 wrote to memory of 3048	2128	2025-02-03_4858645e5dfe2b3c29b52ad93c9a0167_mafia.exe	38
PID 2128 wrote to memory of 3048	2128	2025-02-03_4858645e5dfe2b3c29b52ad93c9a0167_mafia.exe	38
PID 2128 wrote to memory of 3048	2128	2025-02-03_4858645e5dfe2b3c29b52ad93c9a0167_mafia.exe	38
PID 2816 wrote to memory of 2940	2816	yxlnbyzr.exe	41
PID 2816 wrote to memory of 2940	2816	yxlnbyzr.exe	41
PID 2816 wrote to memory of 2940	2816	yxlnbyzr.exe	41
PID 2816 wrote to memory of 2940	2816	yxlnbyzr.exe	41
PID 2816 wrote to memory of 2940	2816	yxlnbyzr.exe	41
PID 2816 wrote to memory of 2940	2816	yxlnbyzr.exe	41
PID 2128 wrote to memory of 2868	2128	2025-02-03_4858645e5dfe2b3c29b52ad93c9a0167_mafia.exe	42
PID 2128 wrote to memory of 2868	2128	2025-02-03_4858645e5dfe2b3c29b52ad93c9a0167_mafia.exe	42
PID 2128 wrote to memory of 2868	2128	2025-02-03_4858645e5dfe2b3c29b52ad93c9a0167_mafia.exe	42
PID 2128 wrote to memory of 2868	2128	2025-02-03_4858645e5dfe2b3c29b52ad93c9a0167_mafia.exe	42

C:\Users\Admin\AppData\Local\Temp\2025-02-03_4858645e5dfe2b3c29b52ad93c9a0167_mafia.exe
"C:\Users\Admin\AppData\Local\Temp\2025-02-03_4858645e5dfe2b3c29b52ad93c9a0167_mafia.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2128
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\tkjgyjsl\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1048
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\yxlnbyzr.exe" C:\Windows\SysWOW64\tkjgyjsl\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2320
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create tkjgyjsl binPath= "C:\Windows\SysWOW64\tkjgyjsl\yxlnbyzr.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-02-03_4858645e5dfe2b3c29b52ad93c9a0167_mafia.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2484
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description tkjgyjsl "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2476
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start tkjgyjsl
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3048
- 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:2868

C:\Windows\SysWOW64\tkjgyjsl\yxlnbyzr.exe
C:\Windows\SysWOW64\tkjgyjsl\yxlnbyzr.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-02-03_4858645e5dfe2b3c29b52ad93c9a0167_mafia.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2816
- 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:2940

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\yxlnbyzr.exe

Filesize
10.1MB

MD5
5f4f6a20e5034ad0162008b66a0f2ed7

SHA1
db477f781b457784413f15cdb155549a71a3b1e3

SHA256
d1b4a9cccedcd4d9dd40304709c39a7c54044be6f6cb78ad7f196b3ad9cd7047

SHA512
348bf86d77da93fd0f18bc0bcfbeb62e939df36244a6d20dbb1fe4ec6b5bc6782363e6a61304c57fc5fdb41f648954b0bf9bf78c01b3d621127a431a089f4edc

Download Submit
memory/2128-16-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2128-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2128-2-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/2128-17-0x0000000000570000-0x0000000000670000-memory.dmp

Filesize
1024KB

Download
memory/2128-1-0x0000000000570000-0x0000000000670000-memory.dmp

Filesize
1024KB

Download
memory/2128-15-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/2128-14-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/2816-12-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/2940-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2940-8-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2940-11-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2940-18-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2940-19-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads