tofsee | 4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8

General

Target

4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe
Size

333KB
MD5

76a120236d4a3c44182016bd9a05417c
SHA1

c548777e9a3fb26597525edee630c79231357a5b
SHA256

4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8
SHA512

e773fa8ed3eeb3aae4ce818553f5f06a9f3c8f7e7b89135c10743bffb989b16862d0e29d855194203aef3a1fe19420308bddad92922b3b1bd1a6357e09ffe246
SSDEEP

6144:xOYmVlRyNQpj0ViCx2xKxc9Sh/KXl/wLWlWC8RzZap6j:xW7Rw2j0VmKqgJKXlwGeVZL

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

Processes:

netsh.exe

pid	Process
3732	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\tyuvkmhk\ImagePath = "C:\\Windows\\SysWOW64\\tyuvkmhk\\cumtsjub.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

Processes:

4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid	Process
976	svchost.exe

Executes dropped EXE 1 IoCs

Processes:

cumtsjub.exe

pid	Process
3636	cumtsjub.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

cumtsjub.exe

description	pid	Process	procid_target
PID 3636 set thread context of 976	3636	cumtsjub.exe	96

Launches sc.exe 3 IoCs

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

Processes:

sc.exesc.exesc.exe

pid	Process
3516	sc.exe
2272	sc.exe
4728	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

Processes:

netsh.exe

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

Processes:

WerFault.exeWerFault.exe

pid	pid_target	Process	procid_target
1464	3636	WerFault.exe	95
1884	5012	WerFault.exe	82

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

Processes:

4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.execmd.exesc.execumtsjub.execmd.exesc.exesc.exenetsh.exesvchost.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.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	cumtsjub.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	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.execumtsjub.exe

description	pid	Process	procid_target
PID 5012 wrote to memory of 4000	5012	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	83
PID 5012 wrote to memory of 4000	5012	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	83
PID 5012 wrote to memory of 4000	5012	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	83
PID 5012 wrote to memory of 216	5012	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	85
PID 5012 wrote to memory of 216	5012	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	85
PID 5012 wrote to memory of 216	5012	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	85
PID 5012 wrote to memory of 3516	5012	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	87
PID 5012 wrote to memory of 3516	5012	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	87
PID 5012 wrote to memory of 3516	5012	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	87
PID 5012 wrote to memory of 2272	5012	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	89
PID 5012 wrote to memory of 2272	5012	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	89
PID 5012 wrote to memory of 2272	5012	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	89
PID 5012 wrote to memory of 4728	5012	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	93
PID 5012 wrote to memory of 4728	5012	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	93
PID 5012 wrote to memory of 4728	5012	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	93
PID 3636 wrote to memory of 976	3636	cumtsjub.exe	96
PID 3636 wrote to memory of 976	3636	cumtsjub.exe	96
PID 3636 wrote to memory of 976	3636	cumtsjub.exe	96
PID 3636 wrote to memory of 976	3636	cumtsjub.exe	96
PID 3636 wrote to memory of 976	3636	cumtsjub.exe	96
PID 5012 wrote to memory of 3732	5012	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	100
PID 5012 wrote to memory of 3732	5012	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	100
PID 5012 wrote to memory of 3732	5012	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	100

C:\Users\Admin\AppData\Local\Temp\4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe
"C:\Users\Admin\AppData\Local\Temp\4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5012
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\tyuvkmhk\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4000
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\cumtsjub.exe" C:\Windows\SysWOW64\tyuvkmhk\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:216
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create tyuvkmhk binPath= "C:\Windows\SysWOW64\tyuvkmhk\cumtsjub.exe /d\"C:\Users\Admin\AppData\Local\Temp\4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3516
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description tyuvkmhk "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2272
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start tyuvkmhk
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4728
- 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:3732
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5012 -s 1040
  2⤵
  - Program crash
  PID:1884

C:\Windows\SysWOW64\tyuvkmhk\cumtsjub.exe
C:\Windows\SysWOW64\tyuvkmhk\cumtsjub.exe /d"C:\Users\Admin\AppData\Local\Temp\4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3636
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:976
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3636 -s 516
  2⤵
  - Program crash
  PID:1464

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 3636 -ip 3636
1⤵
PID:2952

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 5012 -ip 5012
1⤵
PID:3716

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\cumtsjub.exe

Filesize
12.1MB

MD5
6990bd397897ae25113185d0b4262323

SHA1
9e21a6cb2854c2bd9180f6cb404535eef097cbb2

SHA256
fe8033ca3d0af85ae2426d05de20229d9a1f788312b7f4110a41d10c121d6bf4

SHA512
c120111b930c9afcf974f86fe2d53e0f198a863848d499b0e2c0053b0701dfc5a78a3f92902b800d5c7373086bf96acec0244d36cd7579887395a3930bb97a08

Download Submit
memory/976-14-0x0000000000700000-0x0000000000715000-memory.dmp

Filesize
84KB

Download
memory/976-21-0x0000000000700000-0x0000000000715000-memory.dmp

Filesize
84KB

Download
memory/976-20-0x0000000000700000-0x0000000000715000-memory.dmp

Filesize
84KB

Download
memory/976-19-0x0000000000700000-0x0000000000715000-memory.dmp

Filesize
84KB

Download
memory/976-9-0x0000000000700000-0x0000000000715000-memory.dmp

Filesize
84KB

Download
memory/3636-12-0x0000000000400000-0x0000000000882000-memory.dmp

Filesize
4.5MB

Download
memory/3636-13-0x0000000000400000-0x0000000000882000-memory.dmp

Filesize
4.5MB

Download
memory/3636-8-0x0000000000400000-0x0000000000882000-memory.dmp

Filesize
4.5MB

Download
memory/5012-1-0x0000000000B30000-0x0000000000C30000-memory.dmp

Filesize
1024KB

Download
memory/5012-18-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/5012-17-0x00000000009D0000-0x00000000009E3000-memory.dmp

Filesize
76KB

Download
memory/5012-16-0x0000000000400000-0x0000000000882000-memory.dmp

Filesize
4.5MB

Download
memory/5012-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/5012-2-0x00000000009D0000-0x00000000009E3000-memory.dmp

Filesize
76KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads