tofsee | 82b3608606028f7e9bf7f15045c275a5d839652151123c42c2d5ca152844425b

General

Target

0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe
Size

13.0MB
MD5

d4fbad00810efbb5dbd8a2452fe04ec3
SHA1

65884289994c879fdf192a5e6662a04d1a2f649e
SHA256

0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea
SHA512

b38b6d38106d8cb16dc5967ddd3be58bb5a4475867f1271896f1dbfc516d68b3f5de992a47ef31149ef264d889a1be8990ae26619ec6cc6c2b3a550bf69e7dd8
SSDEEP

24576:cqkEnA6V///////////////////////////////////////////////////////3:cqC

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

niflheimr.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
3076	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\unwyjxto\ImagePath = "C:\\Windows\\SysWOW64\\unwyjxto\\mnjzuxxd.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-1-5-21-2045521122-590294423-3465680274-1000\Control Panel\International\Geo\Nation	0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe

Deletes itself 1 IoCs

pid	Process
2268	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2952	mnjzuxxd.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2952 set thread context of 2268	2952	mnjzuxxd.exe	101

Launches sc.exe 3 IoCs

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

pid	Process
1992	sc.exe
2924	sc.exe
1984	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

Program crash 2 IoCs

pid	pid_target	Process	procid_target
3444	1360	WerFault.exe	82
2172	2952	WerFault.exe	94

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	0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mnjzuxxd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1360 wrote to memory of 1996	1360	0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe	83
PID 1360 wrote to memory of 1996	1360	0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe	83
PID 1360 wrote to memory of 1996	1360	0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe	83
PID 1360 wrote to memory of 4336	1360	0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe	86
PID 1360 wrote to memory of 4336	1360	0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe	86
PID 1360 wrote to memory of 4336	1360	0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe	86
PID 1360 wrote to memory of 1992	1360	0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe	88
PID 1360 wrote to memory of 1992	1360	0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe	88
PID 1360 wrote to memory of 1992	1360	0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe	88
PID 1360 wrote to memory of 2924	1360	0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe	90
PID 1360 wrote to memory of 2924	1360	0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe	90
PID 1360 wrote to memory of 2924	1360	0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe	90
PID 1360 wrote to memory of 1984	1360	0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe	92
PID 1360 wrote to memory of 1984	1360	0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe	92
PID 1360 wrote to memory of 1984	1360	0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe	92
PID 1360 wrote to memory of 3076	1360	0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe	95
PID 1360 wrote to memory of 3076	1360	0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe	95
PID 1360 wrote to memory of 3076	1360	0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe	95
PID 2952 wrote to memory of 2268	2952	mnjzuxxd.exe	101
PID 2952 wrote to memory of 2268	2952	mnjzuxxd.exe	101
PID 2952 wrote to memory of 2268	2952	mnjzuxxd.exe	101
PID 2952 wrote to memory of 2268	2952	mnjzuxxd.exe	101
PID 2952 wrote to memory of 2268	2952	mnjzuxxd.exe	101

C:\Users\Admin\AppData\Local\Temp\0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe
"C:\Users\Admin\AppData\Local\Temp\0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1360
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\unwyjxto\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1996
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\mnjzuxxd.exe" C:\Windows\SysWOW64\unwyjxto\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4336
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create unwyjxto binPath= "C:\Windows\SysWOW64\unwyjxto\mnjzuxxd.exe /d\"C:\Users\Admin\AppData\Local\Temp\0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1992
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description unwyjxto "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2924
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start unwyjxto
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1984
- 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:3076
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1360 -s 572
  2⤵
  - Program crash
  PID:3444

C:\Windows\SysWOW64\unwyjxto\mnjzuxxd.exe
C:\Windows\SysWOW64\unwyjxto\mnjzuxxd.exe /d"C:\Users\Admin\AppData\Local\Temp\0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2952
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2268
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2952 -s 548
  2⤵
  - Program crash
  PID:2172

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 1360 -ip 1360
1⤵
PID:4956

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 2952 -ip 2952
1⤵
PID:2532

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\mnjzuxxd.exe

Filesize
10.7MB

MD5
db9cd2ca46ed4d239a0fc193a0af6e3e

SHA1
ffdda4db84440dbf5da5f0e66f9b19bab0b42545

SHA256
476fc45e724899a07ffc3a37a7393e7db6e9eb2294a0b56e0584405cefc4cae1

SHA512
210b0f5941a8dab4ee0c78714b8a7e4a2d38f7ac4980a953a50db0fa7640874601775cddebbbe3bd1c265a6072381a8b063daea637ac1c61edea8f5bc9237e6f

Download Submit
memory/1360-7-0x0000000000400000-0x0000000000447000-memory.dmp

Filesize
284KB

Download
memory/1360-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1360-2-0x0000000002190000-0x00000000021A3000-memory.dmp

Filesize
76KB

Download
memory/1360-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1360-8-0x0000000002190000-0x00000000021A3000-memory.dmp

Filesize
76KB

Download
memory/1360-1-0x0000000000570000-0x0000000000670000-memory.dmp

Filesize
1024KB

Download
memory/2268-17-0x0000000000E20000-0x0000000000E35000-memory.dmp

Filesize
84KB

Download
memory/2268-16-0x0000000000E20000-0x0000000000E35000-memory.dmp

Filesize
84KB

Download
memory/2268-14-0x0000000000E20000-0x0000000000E35000-memory.dmp

Filesize
84KB

Download
memory/2952-18-0x0000000000400000-0x0000000000447000-memory.dmp

Filesize
284KB

Download
memory/2952-13-0x0000000000400000-0x0000000000447000-memory.dmp

Filesize
284KB

Download
memory/2952-12-0x0000000000400000-0x0000000000447000-memory.dmp

Filesize
284KB

Download
memory/2952-11-0x0000000000400000-0x0000000000447000-memory.dmp

Filesize
284KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads