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
1996	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\zephatfn\ImagePath = "C:\\Windows\\SysWOW64\\zephatfn\\bzjkmilr.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-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe

Deletes itself 1 IoCs

pid	Process
1560	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1636	bzjkmilr.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1636 set thread context of 1560	1636	bzjkmilr.exe	95

Launches sc.exe 3 IoCs

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

pid	Process
4896	sc.exe
4384	sc.exe
1128	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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	bzjkmilr.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

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4088 wrote to memory of 3256	4088	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	82
PID 4088 wrote to memory of 3256	4088	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	82
PID 4088 wrote to memory of 3256	4088	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	82
PID 4088 wrote to memory of 3060	4088	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	84
PID 4088 wrote to memory of 3060	4088	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	84
PID 4088 wrote to memory of 3060	4088	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	84
PID 4088 wrote to memory of 4896	4088	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	86
PID 4088 wrote to memory of 4896	4088	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	86
PID 4088 wrote to memory of 4896	4088	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	86
PID 4088 wrote to memory of 4384	4088	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	88
PID 4088 wrote to memory of 4384	4088	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	88
PID 4088 wrote to memory of 4384	4088	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	88
PID 4088 wrote to memory of 1128	4088	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	90
PID 4088 wrote to memory of 1128	4088	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	90
PID 4088 wrote to memory of 1128	4088	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	90
PID 4088 wrote to memory of 1996	4088	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	93
PID 4088 wrote to memory of 1996	4088	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	93
PID 4088 wrote to memory of 1996	4088	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	93
PID 1636 wrote to memory of 1560	1636	bzjkmilr.exe	95
PID 1636 wrote to memory of 1560	1636	bzjkmilr.exe	95
PID 1636 wrote to memory of 1560	1636	bzjkmilr.exe	95
PID 1636 wrote to memory of 1560	1636	bzjkmilr.exe	95
PID 1636 wrote to memory of 1560	1636	bzjkmilr.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:4088
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\zephatfn\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3256
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\bzjkmilr.exe" C:\Windows\SysWOW64\zephatfn\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3060
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create zephatfn binPath= "C:\Windows\SysWOW64\zephatfn\bzjkmilr.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:4896
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description zephatfn "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4384
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start zephatfn
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1128
- 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:1996

C:\Windows\SysWOW64\zephatfn\bzjkmilr.exe
C:\Windows\SysWOW64\zephatfn\bzjkmilr.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:1636
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:1560

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\bzjkmilr.exe

Filesize
10.2MB

MD5
25edab0c91122e593f3d6ab59cb24ab0

SHA1
af8651ba7e3a0cd8dee7594e76b74f7eb163a767

SHA256
846a791edfe8b22f0555c0e1820fe6314563c130c8a4a89af581a4b916819ba8

SHA512
fe08053bad67f90713c8344ae118c930c0d6b0631e527273622f1d791b124023de18454ad0f7cbea877d61244d829e7a67b0d841874272a96caa8c215cd8a2a8

Download Submit
memory/1560-11-0x0000000000990000-0x00000000009A5000-memory.dmp

Filesize
84KB

Download
memory/1560-13-0x0000000000990000-0x00000000009A5000-memory.dmp

Filesize
84KB

Download
memory/1560-15-0x0000000000990000-0x00000000009A5000-memory.dmp

Filesize
84KB

Download
memory/1636-14-0x0000000000400000-0x000000000070E000-memory.dmp

Filesize
3.1MB

Download
memory/4088-1-0x00000000007B0000-0x00000000008B0000-memory.dmp

Filesize
1024KB

Download
memory/4088-2-0x0000000002460000-0x0000000002473000-memory.dmp

Filesize
76KB

Download
memory/4088-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4088-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4088-8-0x0000000002460000-0x0000000002473000-memory.dmp

Filesize
76KB

Download
memory/4088-7-0x0000000000400000-0x000000000070E000-memory.dmp

Filesize
3.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads