tofsee | 325a874d9620fca74cba2bbca78fbb73cf1636fe399a8666e3ca34fe2aed8c09

General

Target

c944b1c3a2ec3d3141c00e8b83c4a88b5c76057f1119b3de079056fd65d2d33f.exe
Size

260KB
MD5

17e796c1d99911ce19512a8adb8ea55a
SHA1

e4e6aa0076157643919abbf26d9a444fd170d2e9
SHA256

c944b1c3a2ec3d3141c00e8b83c4a88b5c76057f1119b3de079056fd65d2d33f
SHA512

24c4e6e1303a817842d3a6019183d252abf24877aab184459782f7c1eac608feadf04f537164fec59e6ac30598759ccfb7fb7d85240fd5b527a15b8152951342
SSDEEP

3072:xXO0xmVPc4N9LLXf3D7n5ksUGMAHXijUgzYcYhvT+iyQuvM/h3R:VNmVPhN9LjDfUK3j/W8

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

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
5020	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\ttguvvvh\ImagePath = "C:\\Windows\\SysWOW64\\ttguvvvh\\jlozuode.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-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	c944b1c3a2ec3d3141c00e8b83c4a88b5c76057f1119b3de079056fd65d2d33f.exe

Deletes itself 1 IoCs

pid	Process
4700	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2504	jlozuode.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2504 set thread context of 4700	2504	jlozuode.exe	102

Launches sc.exe 3 IoCs

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

pid	Process
1772	sc.exe
4916	sc.exe
3924	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
2664	3120	WerFault.exe	81
4840	2504	WerFault.exe	92

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	c944b1c3a2ec3d3141c00e8b83c4a88b5c76057f1119b3de079056fd65d2d33f.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	jlozuode.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	netsh.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3120 wrote to memory of 4524	3120	c944b1c3a2ec3d3141c00e8b83c4a88b5c76057f1119b3de079056fd65d2d33f.exe	82
PID 3120 wrote to memory of 4524	3120	c944b1c3a2ec3d3141c00e8b83c4a88b5c76057f1119b3de079056fd65d2d33f.exe	82
PID 3120 wrote to memory of 4524	3120	c944b1c3a2ec3d3141c00e8b83c4a88b5c76057f1119b3de079056fd65d2d33f.exe	82
PID 3120 wrote to memory of 3708	3120	c944b1c3a2ec3d3141c00e8b83c4a88b5c76057f1119b3de079056fd65d2d33f.exe	84
PID 3120 wrote to memory of 3708	3120	c944b1c3a2ec3d3141c00e8b83c4a88b5c76057f1119b3de079056fd65d2d33f.exe	84
PID 3120 wrote to memory of 3708	3120	c944b1c3a2ec3d3141c00e8b83c4a88b5c76057f1119b3de079056fd65d2d33f.exe	84
PID 3120 wrote to memory of 1772	3120	c944b1c3a2ec3d3141c00e8b83c4a88b5c76057f1119b3de079056fd65d2d33f.exe	86
PID 3120 wrote to memory of 1772	3120	c944b1c3a2ec3d3141c00e8b83c4a88b5c76057f1119b3de079056fd65d2d33f.exe	86
PID 3120 wrote to memory of 1772	3120	c944b1c3a2ec3d3141c00e8b83c4a88b5c76057f1119b3de079056fd65d2d33f.exe	86
PID 3120 wrote to memory of 4916	3120	c944b1c3a2ec3d3141c00e8b83c4a88b5c76057f1119b3de079056fd65d2d33f.exe	88
PID 3120 wrote to memory of 4916	3120	c944b1c3a2ec3d3141c00e8b83c4a88b5c76057f1119b3de079056fd65d2d33f.exe	88
PID 3120 wrote to memory of 4916	3120	c944b1c3a2ec3d3141c00e8b83c4a88b5c76057f1119b3de079056fd65d2d33f.exe	88
PID 3120 wrote to memory of 3924	3120	c944b1c3a2ec3d3141c00e8b83c4a88b5c76057f1119b3de079056fd65d2d33f.exe	90
PID 3120 wrote to memory of 3924	3120	c944b1c3a2ec3d3141c00e8b83c4a88b5c76057f1119b3de079056fd65d2d33f.exe	90
PID 3120 wrote to memory of 3924	3120	c944b1c3a2ec3d3141c00e8b83c4a88b5c76057f1119b3de079056fd65d2d33f.exe	90
PID 3120 wrote to memory of 5020	3120	c944b1c3a2ec3d3141c00e8b83c4a88b5c76057f1119b3de079056fd65d2d33f.exe	93
PID 3120 wrote to memory of 5020	3120	c944b1c3a2ec3d3141c00e8b83c4a88b5c76057f1119b3de079056fd65d2d33f.exe	93
PID 3120 wrote to memory of 5020	3120	c944b1c3a2ec3d3141c00e8b83c4a88b5c76057f1119b3de079056fd65d2d33f.exe	93
PID 2504 wrote to memory of 4700	2504	jlozuode.exe	102
PID 2504 wrote to memory of 4700	2504	jlozuode.exe	102
PID 2504 wrote to memory of 4700	2504	jlozuode.exe	102
PID 2504 wrote to memory of 4700	2504	jlozuode.exe	102
PID 2504 wrote to memory of 4700	2504	jlozuode.exe	102

C:\Users\Admin\AppData\Local\Temp\c944b1c3a2ec3d3141c00e8b83c4a88b5c76057f1119b3de079056fd65d2d33f.exe
"C:\Users\Admin\AppData\Local\Temp\c944b1c3a2ec3d3141c00e8b83c4a88b5c76057f1119b3de079056fd65d2d33f.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3120
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ttguvvvh\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4524
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\jlozuode.exe" C:\Windows\SysWOW64\ttguvvvh\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3708
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create ttguvvvh binPath= "C:\Windows\SysWOW64\ttguvvvh\jlozuode.exe /d\"C:\Users\Admin\AppData\Local\Temp\c944b1c3a2ec3d3141c00e8b83c4a88b5c76057f1119b3de079056fd65d2d33f.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1772
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description ttguvvvh "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4916
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start ttguvvvh
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3924
- 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:5020
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3120 -s 1036
  2⤵
  - Program crash
  PID:2664

C:\Windows\SysWOW64\ttguvvvh\jlozuode.exe
C:\Windows\SysWOW64\ttguvvvh\jlozuode.exe /d"C:\Users\Admin\AppData\Local\Temp\c944b1c3a2ec3d3141c00e8b83c4a88b5c76057f1119b3de079056fd65d2d33f.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2504
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:4700
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2504 -s 536
  2⤵
  - Program crash
  PID:4840

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 3120 -ip 3120
1⤵
PID:3984

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 2504 -ip 2504
1⤵
PID:2356

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\jlozuode.exe

Filesize
13.2MB

MD5
f3d030dea0fe53a4b45768698cb8428a

SHA1
341ab607d3c2888407d0ca8046d90b4ac80487a1

SHA256
05003e40a879964f01b936abac7e1878c3e9e75b158a5d59bc94f47ea52d8a0e

SHA512
c030118940417363c93547cdf64e4278f97be04dd5815b199093c6fa9380ae07f6eb313890360e37d7bc482549fff2a54405b1fad96a3b1f85aff173f65d8dc4

Download Submit
memory/2504-15-0x0000000000400000-0x0000000002C2E000-memory.dmp

Filesize
40.2MB

Download
memory/3120-1-0x0000000002C60000-0x0000000002D60000-memory.dmp

Filesize
1024KB

Download
memory/3120-2-0x0000000002C40000-0x0000000002C53000-memory.dmp

Filesize
76KB

Download
memory/3120-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3120-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3120-9-0x0000000002C40000-0x0000000002C53000-memory.dmp

Filesize
76KB

Download
memory/3120-8-0x0000000000400000-0x0000000002C2E000-memory.dmp

Filesize
40.2MB

Download
memory/4700-11-0x0000000000310000-0x0000000000325000-memory.dmp

Filesize
84KB

Download
memory/4700-13-0x0000000000310000-0x0000000000325000-memory.dmp

Filesize
84KB

Download
memory/4700-14-0x0000000000310000-0x0000000000325000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads