tofsee | d7fe9f760dfce3b7a6b53e5159d3b7af53cf7c1041af9bbb9f1e335d9946d74e

Analysis

max time kernel
145s
max time network
121s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
22-12-2024 20:08

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General

Target

2024-12-22_b82fd7f8c53a08352f6a9b9334e91beb_mafia.exe
Size

14.8MB
MD5

b82fd7f8c53a08352f6a9b9334e91beb
SHA1

1706f756e43a88d305fa8ef491e5d71b8505c3cc
SHA256

d7fe9f760dfce3b7a6b53e5159d3b7af53cf7c1041af9bbb9f1e335d9946d74e
SHA512

3e0abd797ac7aaef9861a7ff397d1370956fafc51839bc98aaea524d4c9853d13e91119ee24ce2eb9b6a99d2b476defa1a0995bd655b3468a20aab713604002d
SSDEEP

3072:wLBgXOXcdW8tar7vGdq8c7YMl2b8anmMXnb58XuDP9het3Zv1oSW1za2E+w5C2/Y:NOMdRQr7OB0ypmMXnl8XEPM3noSWOC

Score

10^/10

tofsee discovery evasion 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

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\ygydmxsr = "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

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
2908	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\ygydmxsr\ImagePath = "C:\\Windows\\SysWOW64\\ygydmxsr\\bkejbavr.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2956	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2756	bkejbavr.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2756 set thread context of 2956	2756	bkejbavr.exe	41

Launches sc.exe 3 IoCs

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

pid	Process
2484	sc.exe
2732	sc.exe
2832	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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2024-12-22_b82fd7f8c53a08352f6a9b9334e91beb_mafia.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	bkejbavr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2352 wrote to memory of 1600	2352	2024-12-22_b82fd7f8c53a08352f6a9b9334e91beb_mafia.exe	30
PID 2352 wrote to memory of 1600	2352	2024-12-22_b82fd7f8c53a08352f6a9b9334e91beb_mafia.exe	30
PID 2352 wrote to memory of 1600	2352	2024-12-22_b82fd7f8c53a08352f6a9b9334e91beb_mafia.exe	30
PID 2352 wrote to memory of 1600	2352	2024-12-22_b82fd7f8c53a08352f6a9b9334e91beb_mafia.exe	30
PID 2352 wrote to memory of 2556	2352	2024-12-22_b82fd7f8c53a08352f6a9b9334e91beb_mafia.exe	32
PID 2352 wrote to memory of 2556	2352	2024-12-22_b82fd7f8c53a08352f6a9b9334e91beb_mafia.exe	32
PID 2352 wrote to memory of 2556	2352	2024-12-22_b82fd7f8c53a08352f6a9b9334e91beb_mafia.exe	32
PID 2352 wrote to memory of 2556	2352	2024-12-22_b82fd7f8c53a08352f6a9b9334e91beb_mafia.exe	32
PID 2352 wrote to memory of 2484	2352	2024-12-22_b82fd7f8c53a08352f6a9b9334e91beb_mafia.exe	34
PID 2352 wrote to memory of 2484	2352	2024-12-22_b82fd7f8c53a08352f6a9b9334e91beb_mafia.exe	34
PID 2352 wrote to memory of 2484	2352	2024-12-22_b82fd7f8c53a08352f6a9b9334e91beb_mafia.exe	34
PID 2352 wrote to memory of 2484	2352	2024-12-22_b82fd7f8c53a08352f6a9b9334e91beb_mafia.exe	34
PID 2352 wrote to memory of 2732	2352	2024-12-22_b82fd7f8c53a08352f6a9b9334e91beb_mafia.exe	36
PID 2352 wrote to memory of 2732	2352	2024-12-22_b82fd7f8c53a08352f6a9b9334e91beb_mafia.exe	36
PID 2352 wrote to memory of 2732	2352	2024-12-22_b82fd7f8c53a08352f6a9b9334e91beb_mafia.exe	36
PID 2352 wrote to memory of 2732	2352	2024-12-22_b82fd7f8c53a08352f6a9b9334e91beb_mafia.exe	36
PID 2352 wrote to memory of 2832	2352	2024-12-22_b82fd7f8c53a08352f6a9b9334e91beb_mafia.exe	38
PID 2352 wrote to memory of 2832	2352	2024-12-22_b82fd7f8c53a08352f6a9b9334e91beb_mafia.exe	38
PID 2352 wrote to memory of 2832	2352	2024-12-22_b82fd7f8c53a08352f6a9b9334e91beb_mafia.exe	38
PID 2352 wrote to memory of 2832	2352	2024-12-22_b82fd7f8c53a08352f6a9b9334e91beb_mafia.exe	38
PID 2756 wrote to memory of 2956	2756	bkejbavr.exe	41
PID 2756 wrote to memory of 2956	2756	bkejbavr.exe	41
PID 2756 wrote to memory of 2956	2756	bkejbavr.exe	41
PID 2756 wrote to memory of 2956	2756	bkejbavr.exe	41
PID 2756 wrote to memory of 2956	2756	bkejbavr.exe	41
PID 2756 wrote to memory of 2956	2756	bkejbavr.exe	41
PID 2352 wrote to memory of 2908	2352	2024-12-22_b82fd7f8c53a08352f6a9b9334e91beb_mafia.exe	42
PID 2352 wrote to memory of 2908	2352	2024-12-22_b82fd7f8c53a08352f6a9b9334e91beb_mafia.exe	42
PID 2352 wrote to memory of 2908	2352	2024-12-22_b82fd7f8c53a08352f6a9b9334e91beb_mafia.exe	42
PID 2352 wrote to memory of 2908	2352	2024-12-22_b82fd7f8c53a08352f6a9b9334e91beb_mafia.exe	42

C:\Users\Admin\AppData\Local\Temp\2024-12-22_b82fd7f8c53a08352f6a9b9334e91beb_mafia.exe
"C:\Users\Admin\AppData\Local\Temp\2024-12-22_b82fd7f8c53a08352f6a9b9334e91beb_mafia.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2352
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ygydmxsr\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1600
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\bkejbavr.exe" C:\Windows\SysWOW64\ygydmxsr\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2556
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create ygydmxsr binPath= "C:\Windows\SysWOW64\ygydmxsr\bkejbavr.exe /d\"C:\Users\Admin\AppData\Local\Temp\2024-12-22_b82fd7f8c53a08352f6a9b9334e91beb_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 ygydmxsr "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2732
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start ygydmxsr
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2832
- 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:2908

C:\Windows\SysWOW64\ygydmxsr\bkejbavr.exe
C:\Windows\SysWOW64\ygydmxsr\bkejbavr.exe /d"C:\Users\Admin\AppData\Local\Temp\2024-12-22_b82fd7f8c53a08352f6a9b9334e91beb_mafia.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2756
- 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:2956

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\bkejbavr.exe

Filesize
11.4MB

MD5
cb3721569c16ee2e86f25b292c2712e3

SHA1
f207b515e5a27be73d0232479d8ca894de09edd7

SHA256
c0322d1e6a2f7a627545575301ad777bd8b476ea791c6bac85f9f1035e09dbd6

SHA512
9f8559bb8cbaa275cf1f9649b6f9a2fae86190ce0ce8a72c85cf34e2bb64699430af8eb3afc3d8cc76fb831f49983beff12f953d51c21003b30152a58b41d84b

Download Submit
memory/2352-14-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/2352-2-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/2352-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2352-15-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2352-1-0x0000000000530000-0x0000000000630000-memory.dmp

Filesize
1024KB

Download
memory/2352-16-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/2756-12-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/2956-8-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2956-11-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2956-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2956-17-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2956-18-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads