tofsee | 7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d

General

Target

7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe
Size

11.2MB
MD5

dc95cb1290fa14086d6e54605ef163e4
SHA1

e38ae542e1c56fc2db4e3976c86af29faf48293a
SHA256

7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d
SHA512

7009d924341b95beb3fb709b6895a44364fa6f9f1f2ce019ce972cdad24870e09abc6e08064e5478a10b21253bf7126b15bab8be3eee0ef37c7ad29ccc64955a
SSDEEP

1536:CpUJsMq8nDNrnUtDDqJ55fNBVcmiCxmeZUUfOxxjDRvgdi0/zvjHNq8wR4vyKT:O6nln1X17rpLfOz3t8Fbti4v

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

103.248.137.133

59.188.74.26

115.230.124.76

111.121.193.242

Signatures

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

Processes:

netsh.exe

pid process

2248 netsh.exe

pid	process
2248	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\gsmskjjf\ImagePath = "C:\\Windows\\SysWOW64\\gsmskjjf\\igssoo.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

Processes:

7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\Control Panel\International\Geo\Nation	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

2116 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

igssoo.exe

pid process

4200 igssoo.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

igssoo.exe

description pid process target process

PID 4200 set thread context of 2116 4200 igssoo.exe svchost.exe
Launches sc.exe 3 IoCs
Sc.exe is a Windows utlilty to control services on the system.

Processes:

sc.exesc.exesc.exe

pid process

4920 sc.exe
1624 sc.exe
3440 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
2116	svchost.exe

pid	process
4200	igssoo.exe

description	pid	process	target process
PID 4200 set thread context of 2116	4200	igssoo.exe	svchost.exe

pid	process
4920	sc.exe
1624	sc.exe
3440	sc.exe

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

Processes:

netsh.exe

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

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

Processes:

7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exesc.exesc.exeigssoo.exesvchost.execmd.execmd.exesc.exenetsh.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.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	igssoo.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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exeigssoo.exe

description	pid	process	target process
PID 4484 wrote to memory of 4180	4484	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	cmd.exe
PID 4484 wrote to memory of 4180	4484	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	cmd.exe
PID 4484 wrote to memory of 4180	4484	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	cmd.exe
PID 4484 wrote to memory of 4380	4484	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	cmd.exe
PID 4484 wrote to memory of 4380	4484	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	cmd.exe
PID 4484 wrote to memory of 4380	4484	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	cmd.exe
PID 4484 wrote to memory of 4920	4484	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	sc.exe
PID 4484 wrote to memory of 4920	4484	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	sc.exe
PID 4484 wrote to memory of 4920	4484	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	sc.exe
PID 4484 wrote to memory of 1624	4484	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	sc.exe
PID 4484 wrote to memory of 1624	4484	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	sc.exe
PID 4484 wrote to memory of 1624	4484	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	sc.exe
PID 4484 wrote to memory of 3440	4484	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	sc.exe
PID 4484 wrote to memory of 3440	4484	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	sc.exe
PID 4484 wrote to memory of 3440	4484	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	sc.exe
PID 4484 wrote to memory of 2248	4484	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	netsh.exe
PID 4484 wrote to memory of 2248	4484	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	netsh.exe
PID 4484 wrote to memory of 2248	4484	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	netsh.exe
PID 4200 wrote to memory of 2116	4200	igssoo.exe	svchost.exe
PID 4200 wrote to memory of 2116	4200	igssoo.exe	svchost.exe
PID 4200 wrote to memory of 2116	4200	igssoo.exe	svchost.exe
PID 4200 wrote to memory of 2116	4200	igssoo.exe	svchost.exe
PID 4200 wrote to memory of 2116	4200	igssoo.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe
"C:\Users\Admin\AppData\Local\Temp\7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4484
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\gsmskjjf\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4180
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\igssoo.exe" C:\Windows\SysWOW64\gsmskjjf\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4380
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create gsmskjjf binPath= "C:\Windows\SysWOW64\gsmskjjf\igssoo.exe /d\"C:\Users\Admin\AppData\Local\Temp\7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe\"" type= own start= auto DisplayName= "P2P Support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4920
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description gsmskjjf "Internet Mobile Support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1624
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start gsmskjjf
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3440
- 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:2248

C:\Windows\SysWOW64\gsmskjjf\igssoo.exe
C:\Windows\SysWOW64\gsmskjjf\igssoo.exe /d"C:\Users\Admin\AppData\Local\Temp\7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4200
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2116

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\igssoo.exe

Filesize
11.0MB

MD5
ed3daa53d67ff47ed311a70d92b572f7

SHA1
eb398f04b54700521ec0e24bdefff840931a60ec

SHA256
55d59e9b7fccc3edabfd2e0e2e13f3180459e8c7838fb3091e142f33499d1f15

SHA512
8264adbf204e79226f2faf85ceda37ee2844539cec710ba6a2b1d4735d05f022942714b688168a4d8f5b63e96523abe256244fa802da4aa0456d9963a98d77e8

Download Submit
memory/2116-10-0x0000000000B00000-0x0000000000B16000-memory.dmp

Filesize
88KB

Download
memory/2116-12-0x0000000000B00000-0x0000000000B16000-memory.dmp

Filesize
88KB

Download
memory/2116-15-0x0000000000B00000-0x0000000000B16000-memory.dmp

Filesize
88KB

Download
memory/4200-7-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/4200-14-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/4484-0-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/4484-3-0x00000000006E0000-0x00000000006E1000-memory.dmp

Filesize
4KB

Download
memory/4484-2-0x0000000000580000-0x0000000000581000-memory.dmp

Filesize
4KB

Download
memory/4484-1-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/4484-8-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads