tofsee | e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f

General

Target

e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f.exe
Size

13.9MB
MD5

74d022d0ed2f393fe0b210879b3456bb
SHA1

ae369acf20264ab7cb35b3301b12b14ad6e71d73
SHA256

e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f
SHA512

1ab7e4dd174754e0187e31149ec93c56f1a495bc4c4c815737df4d01d19eb50c9533bd947ccef75c3344bc17de62103ffa157e8c8a1cad9b8b60badd784b95a0
SSDEEP

393216:BMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMl:BMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMl

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

quadoil.ru

lakeflex.ru

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
4468	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\artutmez\ImagePath = "C:\\Windows\\SysWOW64\\artutmez\\rbgtavuj.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-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f.exe

Deletes itself 1 IoCs

pid	Process
4664	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
536	rbgtavuj.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 536 set thread context of 4664	536	rbgtavuj.exe	109

Launches sc.exe 3 IoCs

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

pid	Process
2412	sc.exe
4568	sc.exe
2336	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
404	1980	WerFault.exe	82
628	536	WerFault.exe	100

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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f.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	svchost.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	rbgtavuj.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1980 wrote to memory of 3236	1980	e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f.exe	83
PID 1980 wrote to memory of 3236	1980	e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f.exe	83
PID 1980 wrote to memory of 3236	1980	e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f.exe	83
PID 1980 wrote to memory of 408	1980	e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f.exe	85
PID 1980 wrote to memory of 408	1980	e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f.exe	85
PID 1980 wrote to memory of 408	1980	e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f.exe	85
PID 1980 wrote to memory of 2412	1980	e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f.exe	89
PID 1980 wrote to memory of 2412	1980	e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f.exe	89
PID 1980 wrote to memory of 2412	1980	e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f.exe	89
PID 1980 wrote to memory of 4568	1980	e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f.exe	91
PID 1980 wrote to memory of 4568	1980	e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f.exe	91
PID 1980 wrote to memory of 4568	1980	e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f.exe	91
PID 1980 wrote to memory of 2336	1980	e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f.exe	97
PID 1980 wrote to memory of 2336	1980	e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f.exe	97
PID 1980 wrote to memory of 2336	1980	e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f.exe	97
PID 1980 wrote to memory of 4468	1980	e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f.exe	101
PID 1980 wrote to memory of 4468	1980	e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f.exe	101
PID 1980 wrote to memory of 4468	1980	e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f.exe	101
PID 536 wrote to memory of 4664	536	rbgtavuj.exe	109
PID 536 wrote to memory of 4664	536	rbgtavuj.exe	109
PID 536 wrote to memory of 4664	536	rbgtavuj.exe	109
PID 536 wrote to memory of 4664	536	rbgtavuj.exe	109
PID 536 wrote to memory of 4664	536	rbgtavuj.exe	109

C:\Users\Admin\AppData\Local\Temp\e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f.exe
"C:\Users\Admin\AppData\Local\Temp\e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1980
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\artutmez\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3236
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\rbgtavuj.exe" C:\Windows\SysWOW64\artutmez\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:408
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create artutmez binPath= "C:\Windows\SysWOW64\artutmez\rbgtavuj.exe /d\"C:\Users\Admin\AppData\Local\Temp\e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2412
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description artutmez "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4568
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start artutmez
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2336
- 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:4468
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1980 -s 1040
  2⤵
  - Program crash
  PID:404

C:\Windows\SysWOW64\artutmez\rbgtavuj.exe
C:\Windows\SysWOW64\artutmez\rbgtavuj.exe /d"C:\Users\Admin\AppData\Local\Temp\e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:536
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:4664
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 536 -s 556
  2⤵
  - Program crash
  PID:628

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 1980 -ip 1980
1⤵
PID:5068

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 536 -ip 536
1⤵
PID:4336

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\rbgtavuj.exe

Filesize
9.9MB

MD5
7e491be14840b38caba464e850714d60

SHA1
cd81c6e44e126f7bfd06cb17acda62cae7f86f19

SHA256
5922b09704d11a0e7c8110d852b6fa0164b3e49379a7aa5403572308e3098442

SHA512
78fc78ba6b97e80a71e1ff9a6b2795b1dfa8d36330824a77b60287ae712a3c35059d8284403eaf0deeb6c16d563dad57a5819192152d7409b28f46d93db56ba3

Download Submit
memory/536-14-0x0000000000400000-0x0000000002F05000-memory.dmp

Filesize
43.0MB

Download
memory/1980-1-0x00000000031C0000-0x00000000031D3000-memory.dmp

Filesize
76KB

Download
memory/1980-0-0x00000000031B0000-0x00000000031BD000-memory.dmp

Filesize
52KB

Download
memory/1980-2-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1980-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1980-8-0x00000000031C0000-0x00000000031D3000-memory.dmp

Filesize
76KB

Download
memory/1980-6-0x0000000000400000-0x0000000002F05000-memory.dmp

Filesize
43.0MB

Download
memory/1980-7-0x00000000031B0000-0x00000000031BD000-memory.dmp

Filesize
52KB

Download
memory/4664-12-0x0000000000830000-0x0000000000845000-memory.dmp

Filesize
84KB

Download
memory/4664-13-0x0000000000830000-0x0000000000845000-memory.dmp

Filesize
84KB

Download
memory/4664-10-0x0000000000830000-0x0000000000845000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads