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

Windows security bypass 2 TTPs 1 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\SysWOW64\gvhrygfu = "0"	svchost.exe

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

2724 netsh.exe

pid	process
2724	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\gvhrygfu\ImagePath = "C:\\Windows\\SysWOW64\\gvhrygfu\\pejkempi.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

664 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

pejkempi.exe

pid process

2652 pejkempi.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

pejkempi.exe

description pid process target process

PID 2652 set thread context of 664 2652 pejkempi.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

2872 sc.exe
2848 sc.exe
2776 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
664	svchost.exe

pid	process
2652	pejkempi.exe

description	pid	process	target process
PID 2652 set thread context of 664	2652	pejkempi.exe	svchost.exe

pid	process
2872	sc.exe
2848	sc.exe
2776	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 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

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:

cmd.exesc.exesc.exenetsh.exepejkempi.exesvchost.exe3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.execmd.exesc.exe

description	ioc	process
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	pejkempi.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.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	sc.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exepejkempi.exe

description	pid	process	target process
PID 2476 wrote to memory of 2928	2476	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	cmd.exe
PID 2476 wrote to memory of 2928	2476	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	cmd.exe
PID 2476 wrote to memory of 2928	2476	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	cmd.exe
PID 2476 wrote to memory of 2928	2476	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	cmd.exe
PID 2476 wrote to memory of 3060	2476	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	cmd.exe
PID 2476 wrote to memory of 3060	2476	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	cmd.exe
PID 2476 wrote to memory of 3060	2476	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	cmd.exe
PID 2476 wrote to memory of 3060	2476	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	cmd.exe
PID 2476 wrote to memory of 2872	2476	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	sc.exe
PID 2476 wrote to memory of 2872	2476	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	sc.exe
PID 2476 wrote to memory of 2872	2476	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	sc.exe
PID 2476 wrote to memory of 2872	2476	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	sc.exe
PID 2476 wrote to memory of 2848	2476	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	sc.exe
PID 2476 wrote to memory of 2848	2476	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	sc.exe
PID 2476 wrote to memory of 2848	2476	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	sc.exe
PID 2476 wrote to memory of 2848	2476	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	sc.exe
PID 2476 wrote to memory of 2776	2476	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	sc.exe
PID 2476 wrote to memory of 2776	2476	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	sc.exe
PID 2476 wrote to memory of 2776	2476	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	sc.exe
PID 2476 wrote to memory of 2776	2476	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	sc.exe
PID 2476 wrote to memory of 2724	2476	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	netsh.exe
PID 2476 wrote to memory of 2724	2476	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	netsh.exe
PID 2476 wrote to memory of 2724	2476	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	netsh.exe
PID 2476 wrote to memory of 2724	2476	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	netsh.exe
PID 2652 wrote to memory of 664	2652	pejkempi.exe	svchost.exe
PID 2652 wrote to memory of 664	2652	pejkempi.exe	svchost.exe
PID 2652 wrote to memory of 664	2652	pejkempi.exe	svchost.exe
PID 2652 wrote to memory of 664	2652	pejkempi.exe	svchost.exe
PID 2652 wrote to memory of 664	2652	pejkempi.exe	svchost.exe
PID 2652 wrote to memory of 664	2652	pejkempi.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe
"C:\Users\Admin\AppData\Local\Temp\3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2476
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\gvhrygfu\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2928
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\pejkempi.exe" C:\Windows\SysWOW64\gvhrygfu\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3060
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create gvhrygfu binPath= "C:\Windows\SysWOW64\gvhrygfu\pejkempi.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:2872
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description gvhrygfu "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2848
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start gvhrygfu
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2776
- 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:2724

C:\Windows\SysWOW64\gvhrygfu\pejkempi.exe
C:\Windows\SysWOW64\gvhrygfu\pejkempi.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:2652
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Windows security bypass
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:664

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

2

T1562

Disable or Modify System Firewall

1

T1562.004

Disable or Modify Tools

Modify Registry

Credential Access

Discovery

System Information Discovery

1

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\pejkempi.exe

Filesize
10.4MB

MD5
e984c03bb1dd8c4784ade42bb3640c37

SHA1
0c43f3df0d87535e8b3ba81344dab7a707a43adc

SHA256
d16f81bd79a1f5205caf07572c804995e43d377ba1fe66e921152373c9dddefe

SHA512
aab9304285cf63541f5f42e530ad24ddadee41054f9186ee8caa9470cae9f0b94df9f9c957b82999d4ead68d9254aff4ad986b04f24679c383dc7c69100500bb

Download Submit
memory/664-13-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/664-15-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/664-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/664-10-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/664-17-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2476-2-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2476-1-0x00000000003C0000-0x00000000003D3000-memory.dmp

Filesize
76KB

Download
memory/2476-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2476-8-0x00000000003C0000-0x00000000003D3000-memory.dmp

Filesize
76KB

Download
memory/2476-7-0x00000000003B0000-0x00000000003BD000-memory.dmp

Filesize
52KB

Download
memory/2476-6-0x0000000000400000-0x0000000002F06000-memory.dmp

Filesize
43.0MB

Download
memory/2476-0-0x00000000003B0000-0x00000000003BD000-memory.dmp

Filesize
52KB

Download
memory/2652-16-0x0000000000400000-0x0000000002F06000-memory.dmp

Filesize
43.0MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads