tofsee | c3c45c2d5a6de31334e9eb57559f442ddc07fc9dce08062714247b69952931ef

General

Target

d2eef19387f131ebef8b9a6599f2d15a99a38712598e24b49fb115474f937de5.exe
Size

13.3MB
MD5

9ac9b03395cb95636509dc9662ce4331
SHA1

2a88725393914efc779d7a18d0e6b8e6b403d549
SHA256

d2eef19387f131ebef8b9a6599f2d15a99a38712598e24b49fb115474f937de5
SHA512

c5583b5569ca303b303b7d4b688c59d8dbd42b171353faaf6e60772f4fe18d7d4901a12c708494690636223da5c71ff78bc9a33cf73368e084264b5f9d04dc57
SSDEEP

98304:666666666666666666666666666666666666666666666666666666666666666D:

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

defeatwax.ru

refabyd.info

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
3432	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\wovkortr\ImagePath = "C:\\Windows\\SysWOW64\\wovkortr\\nqojdkue.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-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	d2eef19387f131ebef8b9a6599f2d15a99a38712598e24b49fb115474f937de5.exe

Deletes itself 1 IoCs

pid	Process
3248	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
848	nqojdkue.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 848 set thread context of 3248	848	nqojdkue.exe	102

Launches sc.exe 3 IoCs

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

pid	Process
464	sc.exe
3684	sc.exe
3132	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
4324	2428	WerFault.exe	84
2368	848	WerFault.exe	96

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	netsh.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	nqojdkue.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	d2eef19387f131ebef8b9a6599f2d15a99a38712598e24b49fb115474f937de5.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2428 wrote to memory of 3992	2428	d2eef19387f131ebef8b9a6599f2d15a99a38712598e24b49fb115474f937de5.exe	85
PID 2428 wrote to memory of 3992	2428	d2eef19387f131ebef8b9a6599f2d15a99a38712598e24b49fb115474f937de5.exe	85
PID 2428 wrote to memory of 3992	2428	d2eef19387f131ebef8b9a6599f2d15a99a38712598e24b49fb115474f937de5.exe	85
PID 2428 wrote to memory of 1792	2428	d2eef19387f131ebef8b9a6599f2d15a99a38712598e24b49fb115474f937de5.exe	87
PID 2428 wrote to memory of 1792	2428	d2eef19387f131ebef8b9a6599f2d15a99a38712598e24b49fb115474f937de5.exe	87
PID 2428 wrote to memory of 1792	2428	d2eef19387f131ebef8b9a6599f2d15a99a38712598e24b49fb115474f937de5.exe	87
PID 2428 wrote to memory of 464	2428	d2eef19387f131ebef8b9a6599f2d15a99a38712598e24b49fb115474f937de5.exe	89
PID 2428 wrote to memory of 464	2428	d2eef19387f131ebef8b9a6599f2d15a99a38712598e24b49fb115474f937de5.exe	89
PID 2428 wrote to memory of 464	2428	d2eef19387f131ebef8b9a6599f2d15a99a38712598e24b49fb115474f937de5.exe	89
PID 2428 wrote to memory of 3684	2428	d2eef19387f131ebef8b9a6599f2d15a99a38712598e24b49fb115474f937de5.exe	92
PID 2428 wrote to memory of 3684	2428	d2eef19387f131ebef8b9a6599f2d15a99a38712598e24b49fb115474f937de5.exe	92
PID 2428 wrote to memory of 3684	2428	d2eef19387f131ebef8b9a6599f2d15a99a38712598e24b49fb115474f937de5.exe	92
PID 2428 wrote to memory of 3132	2428	d2eef19387f131ebef8b9a6599f2d15a99a38712598e24b49fb115474f937de5.exe	94
PID 2428 wrote to memory of 3132	2428	d2eef19387f131ebef8b9a6599f2d15a99a38712598e24b49fb115474f937de5.exe	94
PID 2428 wrote to memory of 3132	2428	d2eef19387f131ebef8b9a6599f2d15a99a38712598e24b49fb115474f937de5.exe	94
PID 2428 wrote to memory of 3432	2428	d2eef19387f131ebef8b9a6599f2d15a99a38712598e24b49fb115474f937de5.exe	97
PID 2428 wrote to memory of 3432	2428	d2eef19387f131ebef8b9a6599f2d15a99a38712598e24b49fb115474f937de5.exe	97
PID 2428 wrote to memory of 3432	2428	d2eef19387f131ebef8b9a6599f2d15a99a38712598e24b49fb115474f937de5.exe	97
PID 848 wrote to memory of 3248	848	nqojdkue.exe	102
PID 848 wrote to memory of 3248	848	nqojdkue.exe	102
PID 848 wrote to memory of 3248	848	nqojdkue.exe	102
PID 848 wrote to memory of 3248	848	nqojdkue.exe	102
PID 848 wrote to memory of 3248	848	nqojdkue.exe	102

C:\Users\Admin\AppData\Local\Temp\d2eef19387f131ebef8b9a6599f2d15a99a38712598e24b49fb115474f937de5.exe
"C:\Users\Admin\AppData\Local\Temp\d2eef19387f131ebef8b9a6599f2d15a99a38712598e24b49fb115474f937de5.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2428
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\wovkortr\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3992
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\nqojdkue.exe" C:\Windows\SysWOW64\wovkortr\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1792
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create wovkortr binPath= "C:\Windows\SysWOW64\wovkortr\nqojdkue.exe /d\"C:\Users\Admin\AppData\Local\Temp\d2eef19387f131ebef8b9a6599f2d15a99a38712598e24b49fb115474f937de5.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:464
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description wovkortr "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3684
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start wovkortr
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3132
- 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:3432
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2428 -s 1444
  2⤵
  - Program crash
  PID:4324

C:\Windows\SysWOW64\wovkortr\nqojdkue.exe
C:\Windows\SysWOW64\wovkortr\nqojdkue.exe /d"C:\Users\Admin\AppData\Local\Temp\d2eef19387f131ebef8b9a6599f2d15a99a38712598e24b49fb115474f937de5.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:848
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:3248
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 848 -s 528
  2⤵
  - Program crash
  PID:2368

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 2428 -ip 2428
1⤵
PID:4416

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 848 -ip 848
1⤵
PID:2768

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

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
10.2MB

MD5
fa3e786377382a7fda6bd05bf0392c44

SHA1
8f2dcdf2807366f0c82cbdfede738cab736f75df

SHA256
ef472449e5c8ab535e20cf1d33ff3196a720a65ef922e3172f35e0400fc877d5

SHA512
952111830f090ff345c9bcfa719b0d2b463247079f89cf14b592c444b10e80a6eedd03aedf2c7ea62f2c8df6fa4c4f40be9f5fe6909a244ade8da998aceaa211

Download Submit
memory/848-10-0x0000000000400000-0x0000000002B52000-memory.dmp

Filesize
39.3MB

Download
memory/2428-1-0x0000000002C40000-0x0000000002D40000-memory.dmp

Filesize
1024KB

Download
memory/2428-2-0x00000000048B0000-0x00000000048C3000-memory.dmp

Filesize
76KB

Download
memory/2428-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2428-13-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2428-12-0x00000000048B0000-0x00000000048C3000-memory.dmp

Filesize
76KB

Download
memory/2428-11-0x0000000000400000-0x0000000002B52000-memory.dmp

Filesize
39.3MB

Download
memory/3248-8-0x0000000000EA0000-0x0000000000EB5000-memory.dmp

Filesize
84KB

Download
memory/3248-14-0x0000000000EA0000-0x0000000000EB5000-memory.dmp

Filesize
84KB

Download
memory/3248-15-0x0000000000EA0000-0x0000000000EB5000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads