tofsee | 2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749

General

Target

2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe
Size

14.1MB
MD5

a707de5d5c4e2813b31ab8cfa03e2b09
SHA1

56f59963bde1d6f1ea8f3f1349f1b4855728c1c0
SHA256

2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749
SHA512

2c5eb637d20c92f02621b2e16dd15fa38db91467a1a76cf381ff04ef6bd05a41931dac298cb92b5e7eefb453f6ded8a5d363082cb8ba5e57adffbcdc4bc40860
SSDEEP

3072:aMFPx8ZeNPqKsjN2VqfrHJpx5uXvw9oXU6L3w4WtWtWtWtWtWtWtWtWtWtWtWtWw:a06ZeNi5jNAqjHJpx5OI9oXjL

Score

10^/10

tofsee defense_evasion discovery execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

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

defense_evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
3804	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\tgcyowhj\ImagePath = "C:\\Windows\\SysWOW64\\tgcyowhj\\pslwwfgg.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-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe

Deletes itself 1 IoCs

pid	Process
1912	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3252	pslwwfgg.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3252 set thread context of 1912	3252	pslwwfgg.exe	95

Launches sc.exe 3 IoCs

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

pid	Process
3200	sc.exe
912	sc.exe
3332	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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	pslwwfgg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3664 wrote to memory of 2560	3664	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	82
PID 3664 wrote to memory of 2560	3664	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	82
PID 3664 wrote to memory of 2560	3664	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	82
PID 3664 wrote to memory of 1748	3664	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	84
PID 3664 wrote to memory of 1748	3664	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	84
PID 3664 wrote to memory of 1748	3664	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	84
PID 3664 wrote to memory of 3200	3664	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	86
PID 3664 wrote to memory of 3200	3664	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	86
PID 3664 wrote to memory of 3200	3664	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	86
PID 3664 wrote to memory of 912	3664	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	88
PID 3664 wrote to memory of 912	3664	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	88
PID 3664 wrote to memory of 912	3664	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	88
PID 3664 wrote to memory of 3332	3664	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	90
PID 3664 wrote to memory of 3332	3664	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	90
PID 3664 wrote to memory of 3332	3664	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	90
PID 3664 wrote to memory of 3804	3664	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	93
PID 3664 wrote to memory of 3804	3664	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	93
PID 3664 wrote to memory of 3804	3664	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	93
PID 3252 wrote to memory of 1912	3252	pslwwfgg.exe	95
PID 3252 wrote to memory of 1912	3252	pslwwfgg.exe	95
PID 3252 wrote to memory of 1912	3252	pslwwfgg.exe	95
PID 3252 wrote to memory of 1912	3252	pslwwfgg.exe	95
PID 3252 wrote to memory of 1912	3252	pslwwfgg.exe	95

C:\Users\Admin\AppData\Local\Temp\2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe
"C:\Users\Admin\AppData\Local\Temp\2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3664
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\tgcyowhj\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2560
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\pslwwfgg.exe" C:\Windows\SysWOW64\tgcyowhj\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1748
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create tgcyowhj binPath= "C:\Windows\SysWOW64\tgcyowhj\pslwwfgg.exe /d\"C:\Users\Admin\AppData\Local\Temp\2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3200
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description tgcyowhj "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:912
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start tgcyowhj
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3332
- 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:3804

C:\Windows\SysWOW64\tgcyowhj\pslwwfgg.exe
C:\Windows\SysWOW64\tgcyowhj\pslwwfgg.exe /d"C:\Users\Admin\AppData\Local\Temp\2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3252
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:1912

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\pslwwfgg.exe

Filesize
14.8MB

MD5
8ca022bd26c7615d9ba46479de47ef3d

SHA1
eb12b3ef53978992a2b9ee8cd08eead903d2e621

SHA256
9bde7b76dd1d5c5116239cba7871d79ac92cf5366ce35da2847e6e7974dc428e

SHA512
00617cae66876767fa9cabf4cd694342d82cf912e00e4880a52d02ec09602d093596e9479e9d2a84885b83c96b2aa9e15e681a66e85d1184b236b0428b724f1f

Download Submit
memory/1912-11-0x0000000000FD0000-0x0000000000FE5000-memory.dmp

Filesize
84KB

Download
memory/1912-14-0x0000000000FD0000-0x0000000000FE5000-memory.dmp

Filesize
84KB

Download
memory/1912-15-0x0000000000FD0000-0x0000000000FE5000-memory.dmp

Filesize
84KB

Download
memory/3252-12-0x0000000000400000-0x000000000070E000-memory.dmp

Filesize
3.1MB

Download
memory/3664-1-0x0000000000800000-0x0000000000900000-memory.dmp

Filesize
1024KB

Download
memory/3664-2-0x0000000002460000-0x0000000002473000-memory.dmp

Filesize
76KB

Download
memory/3664-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3664-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3664-8-0x0000000002460000-0x0000000002473000-memory.dmp

Filesize
76KB

Download
memory/3664-7-0x0000000000400000-0x000000000070E000-memory.dmp

Filesize
3.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads