tofsee | a36378ea861fc985ea84824587384cd4da4c8c3bfa348ef21675c6062558198e

Analysis

max time kernel
146s
max time network
118s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
01-12-2024 17:53

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General

Target

2024-12-01_8f03907ba4f5beb91afca249985588b5_karagany_mafia.exe
Size

14.5MB
MD5

8f03907ba4f5beb91afca249985588b5
SHA1

285442119288693a48d49fac770b5fd1463bf9b0
SHA256

a36378ea861fc985ea84824587384cd4da4c8c3bfa348ef21675c6062558198e
SHA512

6cd27e000c15464c3d0b34ba8f0f3277dd7e9dc0840e95a4c55e5853f243b2cb40e2f19a8efe248b4a7923282a09a6dab8338c695a350786e3f7792d1fcf1b4a
SSDEEP

6144:byXxZTquqxpXAdbbiFyKq3nUOcWfMMMMMMMbt:byXzN8pXAdbbyyZtZfMMMMMMMb

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\onltwkud = "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
2944	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\onltwkud\ImagePath = "C:\\Windows\\SysWOW64\\onltwkud\\arknuhts.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2160	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2888	arknuhts.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2888 set thread context of 2160	2888	arknuhts.exe	44

Launches sc.exe 3 IoCs

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

pid	Process
2248	sc.exe
588	sc.exe
2764	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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.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	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	arknuhts.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2024-12-01_8f03907ba4f5beb91afca249985588b5_karagany_mafia.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2112 wrote to memory of 2300	2112	2024-12-01_8f03907ba4f5beb91afca249985588b5_karagany_mafia.exe	31
PID 2112 wrote to memory of 2300	2112	2024-12-01_8f03907ba4f5beb91afca249985588b5_karagany_mafia.exe	31
PID 2112 wrote to memory of 2300	2112	2024-12-01_8f03907ba4f5beb91afca249985588b5_karagany_mafia.exe	31
PID 2112 wrote to memory of 2300	2112	2024-12-01_8f03907ba4f5beb91afca249985588b5_karagany_mafia.exe	31
PID 2112 wrote to memory of 2072	2112	2024-12-01_8f03907ba4f5beb91afca249985588b5_karagany_mafia.exe	33
PID 2112 wrote to memory of 2072	2112	2024-12-01_8f03907ba4f5beb91afca249985588b5_karagany_mafia.exe	33
PID 2112 wrote to memory of 2072	2112	2024-12-01_8f03907ba4f5beb91afca249985588b5_karagany_mafia.exe	33
PID 2112 wrote to memory of 2072	2112	2024-12-01_8f03907ba4f5beb91afca249985588b5_karagany_mafia.exe	33
PID 2112 wrote to memory of 2248	2112	2024-12-01_8f03907ba4f5beb91afca249985588b5_karagany_mafia.exe	35
PID 2112 wrote to memory of 2248	2112	2024-12-01_8f03907ba4f5beb91afca249985588b5_karagany_mafia.exe	35
PID 2112 wrote to memory of 2248	2112	2024-12-01_8f03907ba4f5beb91afca249985588b5_karagany_mafia.exe	35
PID 2112 wrote to memory of 2248	2112	2024-12-01_8f03907ba4f5beb91afca249985588b5_karagany_mafia.exe	35
PID 2112 wrote to memory of 588	2112	2024-12-01_8f03907ba4f5beb91afca249985588b5_karagany_mafia.exe	37
PID 2112 wrote to memory of 588	2112	2024-12-01_8f03907ba4f5beb91afca249985588b5_karagany_mafia.exe	37
PID 2112 wrote to memory of 588	2112	2024-12-01_8f03907ba4f5beb91afca249985588b5_karagany_mafia.exe	37
PID 2112 wrote to memory of 588	2112	2024-12-01_8f03907ba4f5beb91afca249985588b5_karagany_mafia.exe	37
PID 2112 wrote to memory of 2764	2112	2024-12-01_8f03907ba4f5beb91afca249985588b5_karagany_mafia.exe	39
PID 2112 wrote to memory of 2764	2112	2024-12-01_8f03907ba4f5beb91afca249985588b5_karagany_mafia.exe	39
PID 2112 wrote to memory of 2764	2112	2024-12-01_8f03907ba4f5beb91afca249985588b5_karagany_mafia.exe	39
PID 2112 wrote to memory of 2764	2112	2024-12-01_8f03907ba4f5beb91afca249985588b5_karagany_mafia.exe	39
PID 2112 wrote to memory of 2944	2112	2024-12-01_8f03907ba4f5beb91afca249985588b5_karagany_mafia.exe	42
PID 2112 wrote to memory of 2944	2112	2024-12-01_8f03907ba4f5beb91afca249985588b5_karagany_mafia.exe	42
PID 2112 wrote to memory of 2944	2112	2024-12-01_8f03907ba4f5beb91afca249985588b5_karagany_mafia.exe	42
PID 2112 wrote to memory of 2944	2112	2024-12-01_8f03907ba4f5beb91afca249985588b5_karagany_mafia.exe	42
PID 2888 wrote to memory of 2160	2888	arknuhts.exe	44
PID 2888 wrote to memory of 2160	2888	arknuhts.exe	44
PID 2888 wrote to memory of 2160	2888	arknuhts.exe	44
PID 2888 wrote to memory of 2160	2888	arknuhts.exe	44
PID 2888 wrote to memory of 2160	2888	arknuhts.exe	44
PID 2888 wrote to memory of 2160	2888	arknuhts.exe	44

C:\Users\Admin\AppData\Local\Temp\2024-12-01_8f03907ba4f5beb91afca249985588b5_karagany_mafia.exe
"C:\Users\Admin\AppData\Local\Temp\2024-12-01_8f03907ba4f5beb91afca249985588b5_karagany_mafia.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2112
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\onltwkud\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2300
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\arknuhts.exe" C:\Windows\SysWOW64\onltwkud\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2072
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create onltwkud binPath= "C:\Windows\SysWOW64\onltwkud\arknuhts.exe /d\"C:\Users\Admin\AppData\Local\Temp\2024-12-01_8f03907ba4f5beb91afca249985588b5_karagany_mafia.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2248
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description onltwkud "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:588
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start onltwkud
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2764
- 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:2944

C:\Windows\SysWOW64\onltwkud\arknuhts.exe
C:\Windows\SysWOW64\onltwkud\arknuhts.exe /d"C:\Users\Admin\AppData\Local\Temp\2024-12-01_8f03907ba4f5beb91afca249985588b5_karagany_mafia.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2888
- 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:2160

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\arknuhts.exe

Filesize
11.0MB

MD5
23163b0d0921412612d9fe953f99d258

SHA1
95815c6881849d8646fb83af69587eab7841396f

SHA256
7e1d3d808c20aa00fb2ffaebab8e747c5ddb92b1a0be29fc73c054300f43803a

SHA512
fd75f0da9b4812a1b05852f715f031fb10f536a7185f4108b4f73b46a9db51bbf5b4d89a165f8086c133f9e60d8a232b1b1dd26e70501ee01a0423657167b69e

Download Submit
memory/2112-8-0x00000000002B0000-0x00000000002C3000-memory.dmp

Filesize
76KB

Download
memory/2112-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2112-2-0x00000000002B0000-0x00000000002C3000-memory.dmp

Filesize
76KB

Download
memory/2112-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2112-9-0x0000000000510000-0x0000000000610000-memory.dmp

Filesize
1024KB

Download
memory/2112-1-0x0000000000510000-0x0000000000610000-memory.dmp

Filesize
1024KB

Download
memory/2112-7-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/2160-14-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2160-15-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2160-12-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2160-18-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2160-19-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2888-17-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads