tofsee | ac3366999fcb9a093c9aa8694c6c9c915c3539478efd08655893d26b1d61a86e

General

Target

ac3366999fcb9a093c9aa8694c6c9c915c3539478efd08655893d26b1d61a86e.exe
Size

291KB
MD5

1a6ce36ee783de5148f2c0817ac6dabe
SHA1

fa957807a9fe6a0de8f959b3c67a3365eac569a7
SHA256

ac3366999fcb9a093c9aa8694c6c9c915c3539478efd08655893d26b1d61a86e
SHA512

6fd759a69ce43798a3b43efe578f36923f1e67a8f8969d6f593fd29d442c76d72632a6b8679b679deb6e3f62aa0577eeb13e3938182918adbf247ce2c2822305
SSDEEP

6144:HbDiEbQtM055szCZb55JgXrSXuZet0yob7PANco+hOgw:UM450a55G7SXuZet0yob7Ro+Fw

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
932	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\sjrssacm\ImagePath = "C:\\Windows\\SysWOW64\\sjrssacm\\fkjhxdmb.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-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation	ac3366999fcb9a093c9aa8694c6c9c915c3539478efd08655893d26b1d61a86e.exe

Deletes itself 1 IoCs

pid	Process
2112	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4700	fkjhxdmb.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4700 set thread context of 2112	4700	fkjhxdmb.exe	103

Launches sc.exe 3 IoCs

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

pid	Process
2520	sc.exe
3472	sc.exe
4808	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 queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

Program crash 2 IoCs

pid	pid_target	Process	procid_target
876	3968	WerFault.exe	81
1732	4700	WerFault.exe	96

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	ac3366999fcb9a093c9aa8694c6c9c915c3539478efd08655893d26b1d61a86e.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	fkjhxdmb.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	cmd.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3968 wrote to memory of 3980	3968	ac3366999fcb9a093c9aa8694c6c9c915c3539478efd08655893d26b1d61a86e.exe	82
PID 3968 wrote to memory of 3980	3968	ac3366999fcb9a093c9aa8694c6c9c915c3539478efd08655893d26b1d61a86e.exe	82
PID 3968 wrote to memory of 3980	3968	ac3366999fcb9a093c9aa8694c6c9c915c3539478efd08655893d26b1d61a86e.exe	82
PID 3968 wrote to memory of 2628	3968	ac3366999fcb9a093c9aa8694c6c9c915c3539478efd08655893d26b1d61a86e.exe	86
PID 3968 wrote to memory of 2628	3968	ac3366999fcb9a093c9aa8694c6c9c915c3539478efd08655893d26b1d61a86e.exe	86
PID 3968 wrote to memory of 2628	3968	ac3366999fcb9a093c9aa8694c6c9c915c3539478efd08655893d26b1d61a86e.exe	86
PID 3968 wrote to memory of 2520	3968	ac3366999fcb9a093c9aa8694c6c9c915c3539478efd08655893d26b1d61a86e.exe	88
PID 3968 wrote to memory of 2520	3968	ac3366999fcb9a093c9aa8694c6c9c915c3539478efd08655893d26b1d61a86e.exe	88
PID 3968 wrote to memory of 2520	3968	ac3366999fcb9a093c9aa8694c6c9c915c3539478efd08655893d26b1d61a86e.exe	88
PID 3968 wrote to memory of 3472	3968	ac3366999fcb9a093c9aa8694c6c9c915c3539478efd08655893d26b1d61a86e.exe	92
PID 3968 wrote to memory of 3472	3968	ac3366999fcb9a093c9aa8694c6c9c915c3539478efd08655893d26b1d61a86e.exe	92
PID 3968 wrote to memory of 3472	3968	ac3366999fcb9a093c9aa8694c6c9c915c3539478efd08655893d26b1d61a86e.exe	92
PID 3968 wrote to memory of 4808	3968	ac3366999fcb9a093c9aa8694c6c9c915c3539478efd08655893d26b1d61a86e.exe	94
PID 3968 wrote to memory of 4808	3968	ac3366999fcb9a093c9aa8694c6c9c915c3539478efd08655893d26b1d61a86e.exe	94
PID 3968 wrote to memory of 4808	3968	ac3366999fcb9a093c9aa8694c6c9c915c3539478efd08655893d26b1d61a86e.exe	94
PID 3968 wrote to memory of 932	3968	ac3366999fcb9a093c9aa8694c6c9c915c3539478efd08655893d26b1d61a86e.exe	97
PID 3968 wrote to memory of 932	3968	ac3366999fcb9a093c9aa8694c6c9c915c3539478efd08655893d26b1d61a86e.exe	97
PID 3968 wrote to memory of 932	3968	ac3366999fcb9a093c9aa8694c6c9c915c3539478efd08655893d26b1d61a86e.exe	97
PID 4700 wrote to memory of 2112	4700	fkjhxdmb.exe	103
PID 4700 wrote to memory of 2112	4700	fkjhxdmb.exe	103
PID 4700 wrote to memory of 2112	4700	fkjhxdmb.exe	103
PID 4700 wrote to memory of 2112	4700	fkjhxdmb.exe	103
PID 4700 wrote to memory of 2112	4700	fkjhxdmb.exe	103

C:\Users\Admin\AppData\Local\Temp\ac3366999fcb9a093c9aa8694c6c9c915c3539478efd08655893d26b1d61a86e.exe
"C:\Users\Admin\AppData\Local\Temp\ac3366999fcb9a093c9aa8694c6c9c915c3539478efd08655893d26b1d61a86e.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3968
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\sjrssacm\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3980
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\fkjhxdmb.exe" C:\Windows\SysWOW64\sjrssacm\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2628
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create sjrssacm binPath= "C:\Windows\SysWOW64\sjrssacm\fkjhxdmb.exe /d\"C:\Users\Admin\AppData\Local\Temp\ac3366999fcb9a093c9aa8694c6c9c915c3539478efd08655893d26b1d61a86e.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2520
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description sjrssacm "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3472
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start sjrssacm
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4808
- 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:932
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3968 -s 1040
  2⤵
  - Program crash
  PID:876

C:\Windows\SysWOW64\sjrssacm\fkjhxdmb.exe
C:\Windows\SysWOW64\sjrssacm\fkjhxdmb.exe /d"C:\Users\Admin\AppData\Local\Temp\ac3366999fcb9a093c9aa8694c6c9c915c3539478efd08655893d26b1d61a86e.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4700
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2112
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4700 -s 532
  2⤵
  - Program crash
  PID:1732

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 3968 -ip 3968
1⤵
PID:3340

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 508 -p 4700 -ip 4700
1⤵
PID:2344

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\fkjhxdmb.exe

Filesize
12.2MB

MD5
6cc7d8e990e045c85c5d9d863fb9ce21

SHA1
1c707aeffba605c0c60bca712b1568b2a9a0f121

SHA256
993bba61d7ff7d40ee128bd542928481af1fca496692552fe76d18dbd3b582c6

SHA512
ce0e60f3407820e5483fc0f3a93dd02463a2dae80b8a56b927eb03e05557394859e6729de85327f53904a42bfa2f99ade806a387612f90307ff887bb935bd194

Download Submit
memory/2112-11-0x0000000000B50000-0x0000000000B65000-memory.dmp

Filesize
84KB

Download
memory/2112-13-0x0000000000B50000-0x0000000000B65000-memory.dmp

Filesize
84KB

Download
memory/2112-14-0x0000000000B50000-0x0000000000B65000-memory.dmp

Filesize
84KB

Download
memory/3968-1-0x0000000002C50000-0x0000000002D50000-memory.dmp

Filesize
1024KB

Download
memory/3968-2-0x0000000002C20000-0x0000000002C33000-memory.dmp

Filesize
76KB

Download
memory/3968-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3968-8-0x0000000002C20000-0x0000000002C33000-memory.dmp

Filesize
76KB

Download
memory/3968-7-0x0000000000400000-0x0000000002B41000-memory.dmp

Filesize
39.3MB

Download
memory/3968-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4700-15-0x0000000000400000-0x0000000002B41000-memory.dmp

Filesize
39.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads