tofsee | 1e5987d8df27ee0acc7e6028cff8bbd80467d86fe4155a72e43a13f611f5cfb9

General

Target

2024-12-26_1d4ae3864e8d239273636e01884abbab_mafia.exe
Size

12.3MB
MD5

1d4ae3864e8d239273636e01884abbab
SHA1

a9392dc5b5ec50e26d0508bea5e9736659ad7a77
SHA256

1e5987d8df27ee0acc7e6028cff8bbd80467d86fe4155a72e43a13f611f5cfb9
SHA512

b9fb32811fcbcd923a7fd22b681aa2bf8164a65679c4a1f2b2eb0460ed3bd2a42d800682f688f2272a42ca846907b6b74acf4e34e6528af5d02f8d2a9324ec5f
SSDEEP

3072:xLBgXOXcdW8tar7vGdq8c7YMl2b8anmMXnb58XuDP9het3Zv1oSW1za2E+w5C2/Y:0OMdRQr7OB0ypmMXnl8XEPM3noSWOC

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

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
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
3540	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\brnpsdcp\ImagePath = "C:\\Windows\\SysWOW64\\brnpsdcp\\yhbgyxso.exe"	svchost.exe

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-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	2024-12-26_1d4ae3864e8d239273636e01884abbab_mafia.exe

Deletes itself 1 IoCs

pid	Process
3544	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4976	yhbgyxso.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4976 set thread context of 3544	4976	yhbgyxso.exe	100

Launches sc.exe 3 IoCs

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

pid	Process
2844	sc.exe
2556	sc.exe
3184	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

Program crash 2 IoCs

pid	pid_target	Process	procid_target
4524	3116	WerFault.exe	82
3744	4976	WerFault.exe	93

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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	yhbgyxso.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2024-12-26_1d4ae3864e8d239273636e01884abbab_mafia.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	sc.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3116 wrote to memory of 1592	3116	2024-12-26_1d4ae3864e8d239273636e01884abbab_mafia.exe	83
PID 3116 wrote to memory of 1592	3116	2024-12-26_1d4ae3864e8d239273636e01884abbab_mafia.exe	83
PID 3116 wrote to memory of 1592	3116	2024-12-26_1d4ae3864e8d239273636e01884abbab_mafia.exe	83
PID 3116 wrote to memory of 2148	3116	2024-12-26_1d4ae3864e8d239273636e01884abbab_mafia.exe	85
PID 3116 wrote to memory of 2148	3116	2024-12-26_1d4ae3864e8d239273636e01884abbab_mafia.exe	85
PID 3116 wrote to memory of 2148	3116	2024-12-26_1d4ae3864e8d239273636e01884abbab_mafia.exe	85
PID 3116 wrote to memory of 2844	3116	2024-12-26_1d4ae3864e8d239273636e01884abbab_mafia.exe	87
PID 3116 wrote to memory of 2844	3116	2024-12-26_1d4ae3864e8d239273636e01884abbab_mafia.exe	87
PID 3116 wrote to memory of 2844	3116	2024-12-26_1d4ae3864e8d239273636e01884abbab_mafia.exe	87
PID 3116 wrote to memory of 2556	3116	2024-12-26_1d4ae3864e8d239273636e01884abbab_mafia.exe	89
PID 3116 wrote to memory of 2556	3116	2024-12-26_1d4ae3864e8d239273636e01884abbab_mafia.exe	89
PID 3116 wrote to memory of 2556	3116	2024-12-26_1d4ae3864e8d239273636e01884abbab_mafia.exe	89
PID 3116 wrote to memory of 3184	3116	2024-12-26_1d4ae3864e8d239273636e01884abbab_mafia.exe	91
PID 3116 wrote to memory of 3184	3116	2024-12-26_1d4ae3864e8d239273636e01884abbab_mafia.exe	91
PID 3116 wrote to memory of 3184	3116	2024-12-26_1d4ae3864e8d239273636e01884abbab_mafia.exe	91
PID 3116 wrote to memory of 3540	3116	2024-12-26_1d4ae3864e8d239273636e01884abbab_mafia.exe	94
PID 3116 wrote to memory of 3540	3116	2024-12-26_1d4ae3864e8d239273636e01884abbab_mafia.exe	94
PID 3116 wrote to memory of 3540	3116	2024-12-26_1d4ae3864e8d239273636e01884abbab_mafia.exe	94
PID 4976 wrote to memory of 3544	4976	yhbgyxso.exe	100
PID 4976 wrote to memory of 3544	4976	yhbgyxso.exe	100
PID 4976 wrote to memory of 3544	4976	yhbgyxso.exe	100
PID 4976 wrote to memory of 3544	4976	yhbgyxso.exe	100
PID 4976 wrote to memory of 3544	4976	yhbgyxso.exe	100

C:\Users\Admin\AppData\Local\Temp\2024-12-26_1d4ae3864e8d239273636e01884abbab_mafia.exe
"C:\Users\Admin\AppData\Local\Temp\2024-12-26_1d4ae3864e8d239273636e01884abbab_mafia.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3116
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\brnpsdcp\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1592
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\yhbgyxso.exe" C:\Windows\SysWOW64\brnpsdcp\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2148
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create brnpsdcp binPath= "C:\Windows\SysWOW64\brnpsdcp\yhbgyxso.exe /d\"C:\Users\Admin\AppData\Local\Temp\2024-12-26_1d4ae3864e8d239273636e01884abbab_mafia.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2844
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description brnpsdcp "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2556
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start brnpsdcp
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3184
- 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:3540
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3116 -s 676
  2⤵
  - Program crash
  PID:4524

C:\Windows\SysWOW64\brnpsdcp\yhbgyxso.exe
C:\Windows\SysWOW64\brnpsdcp\yhbgyxso.exe /d"C:\Users\Admin\AppData\Local\Temp\2024-12-26_1d4ae3864e8d239273636e01884abbab_mafia.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4976
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:3544
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4976 -s 508
  2⤵
  - Program crash
  PID:3744

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 3116 -ip 3116
1⤵
PID:2792

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 476 -p 4976 -ip 4976
1⤵
PID:3840

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

1

T1569

Service Execution

1

T1569.002

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Defense Evasion

Impair Defenses

1

T1562

Disable or Modify System Firewall

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
12.8MB

MD5
63267c57679bde0319eb4897be68f584

SHA1
682d9d27613bc2ee21d311306e4708c9ccc045b3

SHA256
2470daa6a668eafed372640580ee665b7631b83ac0ef96c636bf683c0e37fd26

SHA512
8da97361470b6a00ce2c467b9c2344a65cf33152292c53e63c42c88a0f7fca952bc79cfa2cb8a5948c61006a0550930a4e9d10a76663d53ad9163c3ed09404c8

Download Submit
memory/3116-7-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/3116-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3116-2-0x00000000001E0000-0x00000000001F3000-memory.dmp

Filesize
76KB

Download
memory/3116-8-0x00000000001E0000-0x00000000001F3000-memory.dmp

Filesize
76KB

Download
memory/3116-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3116-1-0x00000000004A0000-0x00000000005A0000-memory.dmp

Filesize
1024KB

Download
memory/3544-14-0x0000000000A60000-0x0000000000A75000-memory.dmp

Filesize
84KB

Download
memory/3544-16-0x0000000000A60000-0x0000000000A75000-memory.dmp

Filesize
84KB

Download
memory/3544-17-0x0000000000A60000-0x0000000000A75000-memory.dmp

Filesize
84KB

Download
memory/4976-12-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/4976-11-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/4976-13-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/4976-18-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads