tofsee | eed0b339509bc0a1ba496841e9148ce2b01100f39cf4c08568714156d7072e6a

Analysis

max time kernel
143s
max time network
119s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
15-01-2025 18:51

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General

Target

2025-01-15_3233786abe3f10c3b3c7248873abf10a_mafia.exe
Size

10.7MB
MD5

3233786abe3f10c3b3c7248873abf10a
SHA1

6ed54a117d5f9a237d4d15b5db518dbcaf2ae63a
SHA256

eed0b339509bc0a1ba496841e9148ce2b01100f39cf4c08568714156d7072e6a
SHA512

2b06f09f9a04f1e9e0b8c155772f709297bb83785d052029fa090546857e3265c0dd9e790f6523d3feea5ee5cdef2de62096e54c3ebce02b086315c19e7f76c7
SSDEEP

24576:+pomTTN9tttttttttttttttttttttttttttttttttttttttttttttttttttttttl:Soo

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\dfnzrmyb = "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
2548	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\dfnzrmyb\ImagePath = "C:\\Windows\\SysWOW64\\dfnzrmyb\\bkejbavr.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
3004	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1056	bkejbavr.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1056 set thread context of 3004	1056	bkejbavr.exe	43

Launches sc.exe 3 IoCs

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

pid	Process
2872	sc.exe
2728	sc.exe
2908	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	2025-01-15_3233786abe3f10c3b3c7248873abf10a_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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2180 wrote to memory of 2764	2180	2025-01-15_3233786abe3f10c3b3c7248873abf10a_mafia.exe	30
PID 2180 wrote to memory of 2764	2180	2025-01-15_3233786abe3f10c3b3c7248873abf10a_mafia.exe	30
PID 2180 wrote to memory of 2764	2180	2025-01-15_3233786abe3f10c3b3c7248873abf10a_mafia.exe	30
PID 2180 wrote to memory of 2764	2180	2025-01-15_3233786abe3f10c3b3c7248873abf10a_mafia.exe	30
PID 2180 wrote to memory of 2916	2180	2025-01-15_3233786abe3f10c3b3c7248873abf10a_mafia.exe	32
PID 2180 wrote to memory of 2916	2180	2025-01-15_3233786abe3f10c3b3c7248873abf10a_mafia.exe	32
PID 2180 wrote to memory of 2916	2180	2025-01-15_3233786abe3f10c3b3c7248873abf10a_mafia.exe	32
PID 2180 wrote to memory of 2916	2180	2025-01-15_3233786abe3f10c3b3c7248873abf10a_mafia.exe	32
PID 2180 wrote to memory of 2908	2180	2025-01-15_3233786abe3f10c3b3c7248873abf10a_mafia.exe	34
PID 2180 wrote to memory of 2908	2180	2025-01-15_3233786abe3f10c3b3c7248873abf10a_mafia.exe	34
PID 2180 wrote to memory of 2908	2180	2025-01-15_3233786abe3f10c3b3c7248873abf10a_mafia.exe	34
PID 2180 wrote to memory of 2908	2180	2025-01-15_3233786abe3f10c3b3c7248873abf10a_mafia.exe	34
PID 2180 wrote to memory of 2872	2180	2025-01-15_3233786abe3f10c3b3c7248873abf10a_mafia.exe	36
PID 2180 wrote to memory of 2872	2180	2025-01-15_3233786abe3f10c3b3c7248873abf10a_mafia.exe	36
PID 2180 wrote to memory of 2872	2180	2025-01-15_3233786abe3f10c3b3c7248873abf10a_mafia.exe	36
PID 2180 wrote to memory of 2872	2180	2025-01-15_3233786abe3f10c3b3c7248873abf10a_mafia.exe	36
PID 2180 wrote to memory of 2728	2180	2025-01-15_3233786abe3f10c3b3c7248873abf10a_mafia.exe	38
PID 2180 wrote to memory of 2728	2180	2025-01-15_3233786abe3f10c3b3c7248873abf10a_mafia.exe	38
PID 2180 wrote to memory of 2728	2180	2025-01-15_3233786abe3f10c3b3c7248873abf10a_mafia.exe	38
PID 2180 wrote to memory of 2728	2180	2025-01-15_3233786abe3f10c3b3c7248873abf10a_mafia.exe	38
PID 2180 wrote to memory of 2548	2180	2025-01-15_3233786abe3f10c3b3c7248873abf10a_mafia.exe	41
PID 2180 wrote to memory of 2548	2180	2025-01-15_3233786abe3f10c3b3c7248873abf10a_mafia.exe	41
PID 2180 wrote to memory of 2548	2180	2025-01-15_3233786abe3f10c3b3c7248873abf10a_mafia.exe	41
PID 2180 wrote to memory of 2548	2180	2025-01-15_3233786abe3f10c3b3c7248873abf10a_mafia.exe	41
PID 1056 wrote to memory of 3004	1056	bkejbavr.exe	43
PID 1056 wrote to memory of 3004	1056	bkejbavr.exe	43
PID 1056 wrote to memory of 3004	1056	bkejbavr.exe	43
PID 1056 wrote to memory of 3004	1056	bkejbavr.exe	43
PID 1056 wrote to memory of 3004	1056	bkejbavr.exe	43
PID 1056 wrote to memory of 3004	1056	bkejbavr.exe	43

C:\Users\Admin\AppData\Local\Temp\2025-01-15_3233786abe3f10c3b3c7248873abf10a_mafia.exe
"C:\Users\Admin\AppData\Local\Temp\2025-01-15_3233786abe3f10c3b3c7248873abf10a_mafia.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2180
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\dfnzrmyb\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2764
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\bkejbavr.exe" C:\Windows\SysWOW64\dfnzrmyb\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2916
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create dfnzrmyb binPath= "C:\Windows\SysWOW64\dfnzrmyb\bkejbavr.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-01-15_3233786abe3f10c3b3c7248873abf10a_mafia.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2908
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description dfnzrmyb "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2872
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start dfnzrmyb
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2728
- 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:2548

C:\Windows\SysWOW64\dfnzrmyb\bkejbavr.exe
C:\Windows\SysWOW64\dfnzrmyb\bkejbavr.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-01-15_3233786abe3f10c3b3c7248873abf10a_mafia.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1056
- 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:3004

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
13.7MB

MD5
a10d206cc4a8d51596a26c3c28e870a5

SHA1
732ef00aa3e65d748f11b4899b51650035c61ddd

SHA256
87f8ea33f1f2eb50c2667fc97a5bde12fb81762bb70e4140b255b45dab980c2d

SHA512
eccebf7d85d71968db680ef3e6727683957de238c2b7fb4510804d1af3dbad31a96957ab38aa6c7951eb7e3badc0cbfcbb3a57e393c8099cbc68a4ec795ad228

Download Submit
memory/1056-17-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/2180-7-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/2180-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2180-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2180-8-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/2180-1-0x0000000000540000-0x0000000000640000-memory.dmp

Filesize
1024KB

Download
memory/2180-2-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/3004-14-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/3004-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/3004-11-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/3004-16-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/3004-18-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads