tofsee | 77321567006d0c5b5151682598cea932311e475cd6d015bdec055fcc59cf99db

General

Target

77321567006d0c5b5151682598cea932311e475cd6d015bdec055fcc59cf99db.exe
Size

12.6MB
MD5

dd179af0f87ef059908150114b34696c
SHA1

b5f2f36cda105ff9f2869142ed016f8cfda43fdf
SHA256

77321567006d0c5b5151682598cea932311e475cd6d015bdec055fcc59cf99db
SHA512

4b4561eb56307074705de068d2034ea68ae2d145efbcab7bcd3f0da77a29c50905bf52a5378529a2299b0da1ae90961f2a475cdcbe6d2219d9ab6c5ea1ce3642
SSDEEP

3072:EEtETlIcJpeAXch6LLTjjdQ4TdcUaOE9HBMwu6Z6O3Q7mKte711111111111111n:FEPX86zdndcfrHBgXfmKte

Score

10^/10

tofsee discovery evasion 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

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
2836	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\ybjtwwgs\ImagePath = "C:\\Windows\\SysWOW64\\ybjtwwgs\\iukxlkcg.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-1-5-21-3227495264-2217614367-4027411560-1000\Control Panel\International\Geo\Nation	77321567006d0c5b5151682598cea932311e475cd6d015bdec055fcc59cf99db.exe

Deletes itself 1 IoCs

pid	Process
1176	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4072	iukxlkcg.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4072 set thread context of 1176	4072	iukxlkcg.exe	95

Launches sc.exe 3 IoCs

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

pid	Process
3444	sc.exe
3660	sc.exe
1884	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	sc.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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	77321567006d0c5b5151682598cea932311e475cd6d015bdec055fcc59cf99db.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	iukxlkcg.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 5060 wrote to memory of 3120	5060	77321567006d0c5b5151682598cea932311e475cd6d015bdec055fcc59cf99db.exe	82
PID 5060 wrote to memory of 3120	5060	77321567006d0c5b5151682598cea932311e475cd6d015bdec055fcc59cf99db.exe	82
PID 5060 wrote to memory of 3120	5060	77321567006d0c5b5151682598cea932311e475cd6d015bdec055fcc59cf99db.exe	82
PID 5060 wrote to memory of 844	5060	77321567006d0c5b5151682598cea932311e475cd6d015bdec055fcc59cf99db.exe	84
PID 5060 wrote to memory of 844	5060	77321567006d0c5b5151682598cea932311e475cd6d015bdec055fcc59cf99db.exe	84
PID 5060 wrote to memory of 844	5060	77321567006d0c5b5151682598cea932311e475cd6d015bdec055fcc59cf99db.exe	84
PID 5060 wrote to memory of 3660	5060	77321567006d0c5b5151682598cea932311e475cd6d015bdec055fcc59cf99db.exe	86
PID 5060 wrote to memory of 3660	5060	77321567006d0c5b5151682598cea932311e475cd6d015bdec055fcc59cf99db.exe	86
PID 5060 wrote to memory of 3660	5060	77321567006d0c5b5151682598cea932311e475cd6d015bdec055fcc59cf99db.exe	86
PID 5060 wrote to memory of 1884	5060	77321567006d0c5b5151682598cea932311e475cd6d015bdec055fcc59cf99db.exe	88
PID 5060 wrote to memory of 1884	5060	77321567006d0c5b5151682598cea932311e475cd6d015bdec055fcc59cf99db.exe	88
PID 5060 wrote to memory of 1884	5060	77321567006d0c5b5151682598cea932311e475cd6d015bdec055fcc59cf99db.exe	88
PID 5060 wrote to memory of 3444	5060	77321567006d0c5b5151682598cea932311e475cd6d015bdec055fcc59cf99db.exe	90
PID 5060 wrote to memory of 3444	5060	77321567006d0c5b5151682598cea932311e475cd6d015bdec055fcc59cf99db.exe	90
PID 5060 wrote to memory of 3444	5060	77321567006d0c5b5151682598cea932311e475cd6d015bdec055fcc59cf99db.exe	90
PID 5060 wrote to memory of 2836	5060	77321567006d0c5b5151682598cea932311e475cd6d015bdec055fcc59cf99db.exe	93
PID 5060 wrote to memory of 2836	5060	77321567006d0c5b5151682598cea932311e475cd6d015bdec055fcc59cf99db.exe	93
PID 5060 wrote to memory of 2836	5060	77321567006d0c5b5151682598cea932311e475cd6d015bdec055fcc59cf99db.exe	93
PID 4072 wrote to memory of 1176	4072	iukxlkcg.exe	95
PID 4072 wrote to memory of 1176	4072	iukxlkcg.exe	95
PID 4072 wrote to memory of 1176	4072	iukxlkcg.exe	95
PID 4072 wrote to memory of 1176	4072	iukxlkcg.exe	95
PID 4072 wrote to memory of 1176	4072	iukxlkcg.exe	95

C:\Users\Admin\AppData\Local\Temp\77321567006d0c5b5151682598cea932311e475cd6d015bdec055fcc59cf99db.exe
"C:\Users\Admin\AppData\Local\Temp\77321567006d0c5b5151682598cea932311e475cd6d015bdec055fcc59cf99db.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5060
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ybjtwwgs\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3120
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\iukxlkcg.exe" C:\Windows\SysWOW64\ybjtwwgs\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:844
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create ybjtwwgs binPath= "C:\Windows\SysWOW64\ybjtwwgs\iukxlkcg.exe /d\"C:\Users\Admin\AppData\Local\Temp\77321567006d0c5b5151682598cea932311e475cd6d015bdec055fcc59cf99db.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3660
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description ybjtwwgs "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1884
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start ybjtwwgs
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3444
- 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:2836

C:\Windows\SysWOW64\ybjtwwgs\iukxlkcg.exe
C:\Windows\SysWOW64\ybjtwwgs\iukxlkcg.exe /d"C:\Users\Admin\AppData\Local\Temp\77321567006d0c5b5151682598cea932311e475cd6d015bdec055fcc59cf99db.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:1176

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\iukxlkcg.exe

Filesize
10.1MB

MD5
58333141153585175bc182dff62d038b

SHA1
71aa7a38dc9fe2078d36e315a58c96819c8a0fe3

SHA256
949e25d9fd6df1370a3b555d79745b51cc1b07c3ab601b88289edcd991f0582b

SHA512
686360e90276d165ddd552beab42fc4a62be7712b7f17ff8926cdaa4697896339bf71ef0dc5c6408667561d163be7c262a43ed14f1714875e59a8b0e4d9c6e5d

Download Submit
memory/1176-14-0x0000000000A50000-0x0000000000A65000-memory.dmp

Filesize
84KB

Download
memory/1176-11-0x0000000000A50000-0x0000000000A65000-memory.dmp

Filesize
84KB

Download
memory/1176-15-0x0000000000A50000-0x0000000000A65000-memory.dmp

Filesize
84KB

Download
memory/4072-12-0x0000000000400000-0x0000000002B4A000-memory.dmp

Filesize
39.3MB

Download
memory/5060-1-0x0000000002DD0000-0x0000000002ED0000-memory.dmp

Filesize
1024KB

Download
memory/5060-2-0x0000000004880000-0x0000000004893000-memory.dmp

Filesize
76KB

Download
memory/5060-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/5060-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/5060-8-0x0000000004880000-0x0000000004893000-memory.dmp

Filesize
76KB

Download
memory/5060-7-0x0000000000400000-0x0000000002B4A000-memory.dmp

Filesize
39.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads