tofsee | 3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c

General

Target

3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe
Size

10.4MB
MD5

e710572b1e69a2bc8b423bf5f30a091a
SHA1

f424c5674d79282be1e26e317a2e5e3dc6073723
SHA256

3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c
SHA512

c1a40ce3c71d54543b0606033e495fa1fd012da923d9ffd954eda2361998c0955246ebea80cac202e73b303fc0d370216aed33a2531469d9d659fdf3829cbe59
SSDEEP

196608:Exxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx7:K

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

4200 netsh.exe

pid	process
4200	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\fhgwdnxs\ImagePath = "C:\\Windows\\SysWOW64\\fhgwdnxs\\halbmjcv.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:

3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

1792 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

halbmjcv.exe

pid process

1624 halbmjcv.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

halbmjcv.exe

description pid process target process

PID 1624 set thread context of 1792 1624 halbmjcv.exe svchost.exe
Launches sc.exe 3 IoCs
Sc.exe is a Windows utlilty to control services on the system.

Processes:

sc.exesc.exesc.exe

pid process

4536 sc.exe
4208 sc.exe
4268 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
1792	svchost.exe

pid	process
1624	halbmjcv.exe

description	pid	process	target process
PID 1624 set thread context of 1792	1624	halbmjcv.exe	svchost.exe

pid	process
4536	sc.exe
4208	sc.exe
4268	sc.exe

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 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

Processes:

WerFault.exeWerFault.exe

pid	pid_target	process	target process
1576	3884	WerFault.exe	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe
1500	1624	WerFault.exe	halbmjcv.exe

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:

halbmjcv.exe3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.execmd.execmd.exesc.exesc.exesc.exenetsh.exesvchost.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	halbmjcv.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.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	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	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exehalbmjcv.exe

description	pid	process	target process
PID 3884 wrote to memory of 3676	3884	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	cmd.exe
PID 3884 wrote to memory of 3676	3884	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	cmd.exe
PID 3884 wrote to memory of 3676	3884	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	cmd.exe
PID 3884 wrote to memory of 1640	3884	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	cmd.exe
PID 3884 wrote to memory of 1640	3884	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	cmd.exe
PID 3884 wrote to memory of 1640	3884	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	cmd.exe
PID 3884 wrote to memory of 4268	3884	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	sc.exe
PID 3884 wrote to memory of 4268	3884	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	sc.exe
PID 3884 wrote to memory of 4268	3884	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	sc.exe
PID 3884 wrote to memory of 4536	3884	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	sc.exe
PID 3884 wrote to memory of 4536	3884	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	sc.exe
PID 3884 wrote to memory of 4536	3884	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	sc.exe
PID 3884 wrote to memory of 4208	3884	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	sc.exe
PID 3884 wrote to memory of 4208	3884	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	sc.exe
PID 3884 wrote to memory of 4208	3884	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	sc.exe
PID 3884 wrote to memory of 4200	3884	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	netsh.exe
PID 3884 wrote to memory of 4200	3884	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	netsh.exe
PID 3884 wrote to memory of 4200	3884	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	netsh.exe
PID 1624 wrote to memory of 1792	1624	halbmjcv.exe	svchost.exe
PID 1624 wrote to memory of 1792	1624	halbmjcv.exe	svchost.exe
PID 1624 wrote to memory of 1792	1624	halbmjcv.exe	svchost.exe
PID 1624 wrote to memory of 1792	1624	halbmjcv.exe	svchost.exe
PID 1624 wrote to memory of 1792	1624	halbmjcv.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe
"C:\Users\Admin\AppData\Local\Temp\3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3884
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\fhgwdnxs\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3676
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\halbmjcv.exe" C:\Windows\SysWOW64\fhgwdnxs\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1640
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create fhgwdnxs binPath= "C:\Windows\SysWOW64\fhgwdnxs\halbmjcv.exe /d\"C:\Users\Admin\AppData\Local\Temp\3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4268
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description fhgwdnxs "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4536
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start fhgwdnxs
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4208
- 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:4200
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3884 -s 1264
  2⤵
  - Program crash
  PID:1576

C:\Windows\SysWOW64\fhgwdnxs\halbmjcv.exe
C:\Windows\SysWOW64\fhgwdnxs\halbmjcv.exe /d"C:\Users\Admin\AppData\Local\Temp\3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1624
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:1792
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1624 -s 556
  2⤵
  - Program crash
  PID:1500

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 3884 -ip 3884
1⤵
PID:3308

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 536 -p 1624 -ip 1624
1⤵
PID:3556

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\halbmjcv.exe

Filesize
14.2MB

MD5
0492cc85f51ac24a046004502c89ca34

SHA1
7310fcbae535e5a4ebe7d7ce4b782dc9c6911552

SHA256
d8064f5655c607448640012dc9332a1adce9ef07410cd518afd7b15654b52cb3

SHA512
864b345349894c5d2fb6da31321dda7572961312cbe71af286161075daabc7f7559f0daa00cb7926df0bf29708e0e5c7c8f4b39478a29447ae304832abe3e9a0

Download Submit
memory/1624-14-0x0000000000400000-0x0000000002F06000-memory.dmp

Filesize
43.0MB

Download
memory/1792-10-0x00000000004B0000-0x00000000004C5000-memory.dmp

Filesize
84KB

Download
memory/1792-12-0x00000000004B0000-0x00000000004C5000-memory.dmp

Filesize
84KB

Download
memory/1792-13-0x00000000004B0000-0x00000000004C5000-memory.dmp

Filesize
84KB

Download
memory/3884-0-0x0000000004C50000-0x0000000004C5D000-memory.dmp

Filesize
52KB

Download
memory/3884-1-0x0000000004C60000-0x0000000004C73000-memory.dmp

Filesize
76KB

Download
memory/3884-2-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3884-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3884-8-0x0000000004C60000-0x0000000004C73000-memory.dmp

Filesize
76KB

Download
memory/3884-7-0x0000000004C50000-0x0000000004C5D000-memory.dmp

Filesize
52KB

Download
memory/3884-6-0x0000000000400000-0x0000000002F06000-memory.dmp

Filesize
43.0MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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