tofsee | f8e599a30acd9fc7bf170897613f2a2fc0994f5310ee11918b3a80750c27dfda

General

Target
f8e599a30acd9fc7bf170897613f2a2fc0994f5310ee11918b3a80750c27dfda.exe
Size 14.0MB
Sample261111-29cm8scv3n
SHA256 f8e599a30acd9fc7bf170897613f2a2fc0994f5310ee11918b3a80750c27dfda
MD5 1d033489e5fea1d19fdfe9c0d42c96b4
SHA1 bf56ab10f9c56f57befbbf2a64de194b9f9a315b
SHA512 ff80a84f59436cb85c12ba124cb4202a0c165698992da29e094339b825da3fb4b208d565276dd6ee6d3a96e90b65d7e8d7fe4c74338d538bcdf48158757f74e6
SSDEEP 49152:ZEp0Jrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvz:Zl
TLSH
T154E6436676D86ED9D0CA0FBC09A1C42B5DECFB34043A553096D1504F98AE78A973CBB3
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

defense_evasion discovery execution tofsee persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

defeatwax.ru
refabyd.info

Signatures

Family: Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee

Modifies Windows Firewall 2 TTPs 1 IoCs

defense_evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
4840	netsh.exe

Creates new service(s) 2 TTPs
persistence execution

Windows Service
T1543.003

Service Execution
T1569.002

Executes dropped EXE 1 IoCs

pid	Process
2484	gajtgjoa.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2484 set thread context of 5604	2484	gajtgjoa.exe	101

Launches sc.exe 3 IoCs

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

pid	Process
432	sc.exe
5028	sc.exe
3460	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

Executes a command shell one-liner 1 TTPs 2 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
3820	cmd.exe
5100	cmd.exe

System Location Discovery: System Language Discovery 1 TTPs 8 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	f8e599a30acd9fc7bf170897613f2a2fc0994f5310ee11918b3a80750c27dfda.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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	gajtgjoa.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4392 wrote to memory of 5100	4392	f8e599a30acd9fc7bf170897613f2a2fc0994f5310ee11918b3a80750c27dfda.exe	89
PID 4392 wrote to memory of 3820	4392	f8e599a30acd9fc7bf170897613f2a2fc0994f5310ee11918b3a80750c27dfda.exe	91
PID 4392 wrote to memory of 5028	4392	f8e599a30acd9fc7bf170897613f2a2fc0994f5310ee11918b3a80750c27dfda.exe	93
PID 4392 wrote to memory of 3460	4392	f8e599a30acd9fc7bf170897613f2a2fc0994f5310ee11918b3a80750c27dfda.exe	95
PID 4392 wrote to memory of 432	4392	f8e599a30acd9fc7bf170897613f2a2fc0994f5310ee11918b3a80750c27dfda.exe	98
PID 2484 wrote to memory of 5604	2484	gajtgjoa.exe	101
PID 2484 wrote to memory of 5604	2484	gajtgjoa.exe	101
PID 4392 wrote to memory of 4840	4392	f8e599a30acd9fc7bf170897613f2a2fc0994f5310ee11918b3a80750c27dfda.exe	102

C:\Users\Admin\AppData\Local\Temp\f8e599a30acd9fc7bf170897613f2a2fc0994f5310ee11918b3a80750c27dfda.exe
"C:\Users\Admin\AppData\Local\Temp\f8e599a30acd9fc7bf170897613f2a2fc0994f5310ee11918b3a80750c27dfda.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4392
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\jogedhmc\
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  PID:5100
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\gajtgjoa.exe" C:\Windows\SysWOW64\jogedhmc\
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  PID:3820
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create jogedhmc binPath= "C:\Windows\SysWOW64\jogedhmc\gajtgjoa.exe /d\"C:\Users\Admin\AppData\Local\Temp\f8e599a30acd9fc7bf170897613f2a2fc0994f5310ee11918b3a80750c27dfda.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:5028
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description jogedhmc "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3460
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start jogedhmc
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:432
- 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:4840

C:\Windows\SysWOW64\jogedhmc\gajtgjoa.exe
C:\Windows\SysWOW64\jogedhmc\gajtgjoa.exe /d"C:\Users\Admin\AppData\Local\Temp\f8e599a30acd9fc7bf170897613f2a2fc0994f5310ee11918b3a80750c27dfda.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2484
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  PID:5604

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Windows Command Shell

1

T1059.003

System Services

1

T1569

Service Execution

1

T1569.002

Persistence

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

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

1

T1562.004

Credential Access

Discovery

System Information Discovery

1

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

gajtgjoa.exe

Path C:\Users\Admin\AppData\Local\Temp\gajtgjoa.exe
Size 10.8MB
SHA256 311a5a46028550aea942a47fe805c17ba5182a0fe665ca12133a985b236865ce
MD5 1ab3a7d1028560739507f2a124172211
SHA1 a4a04679f1c4059c81ef42e134cb5b15ae1b7883
SHA512 a57d1a022970ac249dd4c00d08169e2bf352a648c84004c4566fe7b586e8b7427507dd747e0c50cdf5cc6448170971d3c16d1b0014ca511493af3216548475be
SSDEEP 49152:6Ep0Jrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvv:6l
TLSH
T14DB6436676D86ED9D0CA0FBC09A1C42B5DECFB34043A553096D1504F98AE78A973CBB3
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2484-5-0x0000000000400000-0x0000000000449000-memory.dmp

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memory/2484-9-0x0000000000400000-0x0000000000449000-memory.dmp

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memory/4392-0-0x0000000000400000-0x0000000000449000-memory.dmp

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memory/4392-10-0x0000000000400000-0x0000000000449000-memory.dmp

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memory/5604-6-0x0000000000EE0000-0x0000000000F29000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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