tofsee | 553ce75a13c88ab7422641d393c472170ff4368e79eaa1715ab7611bc3ef508d

General

Target

02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2.exe
Size

260KB
MD5

ef7e4a69cb1f773ee7b5ac597f06418a
SHA1

7c09ac3d21a7e7866f8a74c6e39f496a75e005ee
SHA256

02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2
SHA512

bec3b85d3bfa56ab5b1427d870f81bbca45a3bb301c524eca29960185832a3664d449e8d4d320926139d3ec97f425b13e6fbd3b62adcf09987ad82c40f80a7a7
SSDEEP

3072:LuJFB8IkKLXHxuvz5q3jzQctU7cw0e7hwiXJl8T4DKFbJOxjw0L9l5M/h3:+FBFTLXx9zQctze7yiX4kMOxjw0xT

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

jotunheim.name

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
2816	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\xeadcptq\ImagePath = "C:\\Windows\\SysWOW64\\xeadcptq\\fhkvqkza.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-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation	02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2.exe

Deletes itself 1 IoCs

pid	Process
2736	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4072	fhkvqkza.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4072 set thread context of 2736	4072	fhkvqkza.exe	101

Launches sc.exe 3 IoCs

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

pid	Process
776	sc.exe
1148	sc.exe
4548	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 value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

Program crash 4 IoCs

pid	pid_target	Process	procid_target
5040	688	WerFault.exe	82
4060	4072	WerFault.exe	94
2988	4072	WerFault.exe	94
2968	4072	WerFault.exe	94

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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2.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	fhkvqkza.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 688 wrote to memory of 4336	688	02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2.exe	83
PID 688 wrote to memory of 4336	688	02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2.exe	83
PID 688 wrote to memory of 4336	688	02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2.exe	83
PID 688 wrote to memory of 2008	688	02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2.exe	85
PID 688 wrote to memory of 2008	688	02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2.exe	85
PID 688 wrote to memory of 2008	688	02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2.exe	85
PID 688 wrote to memory of 776	688	02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2.exe	87
PID 688 wrote to memory of 776	688	02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2.exe	87
PID 688 wrote to memory of 776	688	02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2.exe	87
PID 688 wrote to memory of 1148	688	02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2.exe	90
PID 688 wrote to memory of 1148	688	02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2.exe	90
PID 688 wrote to memory of 1148	688	02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2.exe	90
PID 688 wrote to memory of 4548	688	02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2.exe	92
PID 688 wrote to memory of 4548	688	02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2.exe	92
PID 688 wrote to memory of 4548	688	02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2.exe	92
PID 688 wrote to memory of 2816	688	02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2.exe	95
PID 688 wrote to memory of 2816	688	02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2.exe	95
PID 688 wrote to memory of 2816	688	02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2.exe	95
PID 4072 wrote to memory of 2736	4072	fhkvqkza.exe	101
PID 4072 wrote to memory of 2736	4072	fhkvqkza.exe	101
PID 4072 wrote to memory of 2736	4072	fhkvqkza.exe	101
PID 4072 wrote to memory of 2736	4072	fhkvqkza.exe	101
PID 4072 wrote to memory of 2736	4072	fhkvqkza.exe	101

C:\Users\Admin\AppData\Local\Temp\02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2.exe
"C:\Users\Admin\AppData\Local\Temp\02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:688
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\xeadcptq\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4336
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\fhkvqkza.exe" C:\Windows\SysWOW64\xeadcptq\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2008
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create xeadcptq binPath= "C:\Windows\SysWOW64\xeadcptq\fhkvqkza.exe /d\"C:\Users\Admin\AppData\Local\Temp\02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:776
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description xeadcptq "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1148
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start xeadcptq
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4548
- 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:2816
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 688 -s 1040
  2⤵
  - Program crash
  PID:5040

C:\Windows\SysWOW64\xeadcptq\fhkvqkza.exe
C:\Windows\SysWOW64\xeadcptq\fhkvqkza.exe /d"C:\Users\Admin\AppData\Local\Temp\02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4072
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2736
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4072 -s 672
  2⤵
  - Program crash
  PID:4060
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4072 -s 744
  2⤵
  - Program crash
  PID:2988
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4072 -s 752
  2⤵
  - Program crash
  PID:2968

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 688 -ip 688
1⤵
PID:4440

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 508 -p 4072 -ip 4072
1⤵
PID:4536

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 4072 -ip 4072
1⤵
PID:4808

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 4072 -ip 4072
1⤵
PID:760

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\fhkvqkza.exe

Filesize
11.2MB

MD5
4f00bafdc59890b29419eaf639e308fb

SHA1
0b4fc6009b1f5b9ba5bcc6115f04d9bad029822b

SHA256
70535cb42350450700bb53f96fcb09b5c0a151fc861155486e8c80a647ea3a44

SHA512
bb14d52a42bafa8e4755d2c00ca210cf64437cfe4308a07f2c9374c783af9e648d0c059b804089cf4c84ac77b182b77cbf281b46c06ec49cc62f9a2e2dcbe625

Download Submit
memory/688-1-0x0000000002DF0000-0x0000000002EF0000-memory.dmp

Filesize
1024KB

Download
memory/688-2-0x0000000002D90000-0x0000000002DA3000-memory.dmp

Filesize
76KB

Download
memory/688-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/688-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/688-9-0x0000000002D90000-0x0000000002DA3000-memory.dmp

Filesize
76KB

Download
memory/688-8-0x0000000000400000-0x0000000002C2F000-memory.dmp

Filesize
40.2MB

Download
memory/2736-11-0x0000000000950000-0x0000000000965000-memory.dmp

Filesize
84KB

Download
memory/2736-13-0x0000000000950000-0x0000000000965000-memory.dmp

Filesize
84KB

Download
memory/2736-14-0x0000000000950000-0x0000000000965000-memory.dmp

Filesize
84KB

Download
memory/4072-15-0x0000000000400000-0x0000000002C2F000-memory.dmp

Filesize
40.2MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads