tofsee | e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85

General

Target

e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85.exe
Size

14.2MB
MD5

1a7967c2003e283817f70289b300ea43
SHA1

5e68b49e7b17bf6873dd5b76a74f7bd8063d596e
SHA256

e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85
SHA512

725cd0e3073e708c3489710e25aa6c4715ff7933223cb1a03f47f36b8dcb30574fdc7e7bf5bbc9eed4c53cae2688bdfff6acf679ca4a7d9077a14e80df9dd5f1
SSDEEP

3072:S1MBkxvfGaF/FzWb9VT5aLj/JSC5kJwSFjhvoGECaNwxAk8Je8Je8Je8Je8Je8Jl:Jk5FOkjRSC6SS+N+

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
3252	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\opjikacg\ImagePath = "C:\\Windows\\SysWOW64\\opjikacg\\jqpckksw.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-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85.exe

Deletes itself 1 IoCs

pid	Process
4960	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3172	jqpckksw.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3172 set thread context of 4960	3172	jqpckksw.exe	96

Launches sc.exe 3 IoCs

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

pid	Process
2160	sc.exe
3580	sc.exe
2768	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 2 IoCs

pid	pid_target	Process	procid_target
4656	3172	WerFault.exe	92
3492	4244	WerFault.exe	81

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	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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	jqpckksw.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4244 wrote to memory of 3500	4244	e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85.exe	82
PID 4244 wrote to memory of 3500	4244	e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85.exe	82
PID 4244 wrote to memory of 3500	4244	e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85.exe	82
PID 4244 wrote to memory of 4044	4244	e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85.exe	84
PID 4244 wrote to memory of 4044	4244	e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85.exe	84
PID 4244 wrote to memory of 4044	4244	e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85.exe	84
PID 4244 wrote to memory of 2160	4244	e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85.exe	86
PID 4244 wrote to memory of 2160	4244	e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85.exe	86
PID 4244 wrote to memory of 2160	4244	e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85.exe	86
PID 4244 wrote to memory of 3580	4244	e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85.exe	88
PID 4244 wrote to memory of 3580	4244	e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85.exe	88
PID 4244 wrote to memory of 3580	4244	e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85.exe	88
PID 4244 wrote to memory of 2768	4244	e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85.exe	90
PID 4244 wrote to memory of 2768	4244	e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85.exe	90
PID 4244 wrote to memory of 2768	4244	e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85.exe	90
PID 4244 wrote to memory of 3252	4244	e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85.exe	93
PID 4244 wrote to memory of 3252	4244	e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85.exe	93
PID 4244 wrote to memory of 3252	4244	e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85.exe	93
PID 3172 wrote to memory of 4960	3172	jqpckksw.exe	96
PID 3172 wrote to memory of 4960	3172	jqpckksw.exe	96
PID 3172 wrote to memory of 4960	3172	jqpckksw.exe	96
PID 3172 wrote to memory of 4960	3172	jqpckksw.exe	96
PID 3172 wrote to memory of 4960	3172	jqpckksw.exe	96

C:\Users\Admin\AppData\Local\Temp\e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85.exe
"C:\Users\Admin\AppData\Local\Temp\e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4244
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\opjikacg\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3500
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\jqpckksw.exe" C:\Windows\SysWOW64\opjikacg\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4044
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create opjikacg binPath= "C:\Windows\SysWOW64\opjikacg\jqpckksw.exe /d\"C:\Users\Admin\AppData\Local\Temp\e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2160
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description opjikacg "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3580
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start opjikacg
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2768
- 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:3252
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4244 -s 636
  2⤵
  - Program crash
  PID:3492

C:\Windows\SysWOW64\opjikacg\jqpckksw.exe
C:\Windows\SysWOW64\opjikacg\jqpckksw.exe /d"C:\Users\Admin\AppData\Local\Temp\e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3172
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:4960
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3172 -s 512
  2⤵
  - Program crash
  PID:4656

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 3172 -ip 3172
1⤵
PID:2108

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 4244 -ip 4244
1⤵
PID:4704

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\jqpckksw.exe

Filesize
11.3MB

MD5
39e371277b000e3f405b72f9f763d897

SHA1
c3048a3e9b6ed92987bd0d55fd4720eaabcabedb

SHA256
4b10bfbec25ff1a093b53f547521787de9634228bd383e17fd87bb724ee7acc2

SHA512
0eb285f90b43613a553f63a4df5405992b30e3b68b7e8afbee125ca6610c6d84746dc885c842f3d4b24543131eaffbaaeb538c7d87c7785981f29c05b5c0e786

Download Submit
memory/3172-10-0x0000000000400000-0x0000000002B4B000-memory.dmp

Filesize
39.3MB

Download
memory/4244-1-0x0000000002BB0000-0x0000000002CB0000-memory.dmp

Filesize
1024KB

Download
memory/4244-2-0x00000000048B0000-0x00000000048C3000-memory.dmp

Filesize
76KB

Download
memory/4244-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4244-13-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4244-12-0x00000000048B0000-0x00000000048C3000-memory.dmp

Filesize
76KB

Download
memory/4244-11-0x0000000000400000-0x0000000002B4B000-memory.dmp

Filesize
39.3MB

Download
memory/4960-8-0x00000000005A0000-0x00000000005B5000-memory.dmp

Filesize
84KB

Download
memory/4960-14-0x00000000005A0000-0x00000000005B5000-memory.dmp

Filesize
84KB

Download
memory/4960-15-0x00000000005A0000-0x00000000005B5000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads