tofsee | 7f1c5f0b80a77bd27bcd5461b0634156017305a85eb56fb09ea8404e67beb449

General

Target
7f1c5f0b80a77bd27bcd5461b0634156017305a85eb56fb09ea8404e67beb449.exe
Size 12.8MB
Sample261109-h419vsvx4r
SHA256 7f1c5f0b80a77bd27bcd5461b0634156017305a85eb56fb09ea8404e67beb449
MD5 28ec4053a9a572b87a09abe6f6d967ac
SHA1 260d018c8f3dd82fce6f59b809e370fa4c6ca182
SHA512 83bac42bb0fc436e07fc0adf13d3902c5d1f87a5cd4b7a0b7be5f8b664188a9fa0949a009dc464f995f8b05cd7c32f51f37ac282f85fe4a2e08d8911947eed08
SSDEEP 49152:VlpsCDrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrn:V/
TLSH
T17BD641AA76BA5ED6D08A0B3C0CB1D5174EACF634083A597251D140CF58EE2CAD73CBB5
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

defense_evasion discovery execution tofsee persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

defeatwax.ru
refabyd.info

Signatures

Family: Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee

Modifies Windows Firewall 2 TTPs 1 IoCs

defense_evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
5228	netsh.exe

Creates new service(s) 2 TTPs
persistence execution

Windows Service
T1543.003

Service Execution
T1569.002

Executes dropped EXE 1 IoCs

pid	Process
5136	sxtljmy.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 5136 set thread context of 3504	5136	sxtljmy.exe	101

Launches sc.exe 3 IoCs

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

pid	Process
3052	sc.exe
3128	sc.exe
248	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

Executes a command shell one-liner 1 TTPs 2 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
5848	cmd.exe
4812	cmd.exe

System Location Discovery: System Language Discovery 1 TTPs 8 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	7f1c5f0b80a77bd27bcd5461b0634156017305a85eb56fb09ea8404e67beb449.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	netsh.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	sxtljmy.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4680 wrote to memory of 5848	4680	7f1c5f0b80a77bd27bcd5461b0634156017305a85eb56fb09ea8404e67beb449.exe	89
PID 4680 wrote to memory of 4812	4680	7f1c5f0b80a77bd27bcd5461b0634156017305a85eb56fb09ea8404e67beb449.exe	91
PID 4680 wrote to memory of 3052	4680	7f1c5f0b80a77bd27bcd5461b0634156017305a85eb56fb09ea8404e67beb449.exe	93
PID 4680 wrote to memory of 3128	4680	7f1c5f0b80a77bd27bcd5461b0634156017305a85eb56fb09ea8404e67beb449.exe	95
PID 4680 wrote to memory of 248	4680	7f1c5f0b80a77bd27bcd5461b0634156017305a85eb56fb09ea8404e67beb449.exe	98
PID 5136 wrote to memory of 3504	5136	sxtljmy.exe	101
PID 5136 wrote to memory of 3504	5136	sxtljmy.exe	101
PID 4680 wrote to memory of 5228	4680	7f1c5f0b80a77bd27bcd5461b0634156017305a85eb56fb09ea8404e67beb449.exe	102

C:\Users\Admin\AppData\Local\Temp\7f1c5f0b80a77bd27bcd5461b0634156017305a85eb56fb09ea8404e67beb449.exe
"C:\Users\Admin\AppData\Local\Temp\7f1c5f0b80a77bd27bcd5461b0634156017305a85eb56fb09ea8404e67beb449.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4680
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\feheevbe\
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  PID:5848
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\sxtljmy.exe" C:\Windows\SysWOW64\feheevbe\
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  PID:4812
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create feheevbe binPath= "C:\Windows\SysWOW64\feheevbe\sxtljmy.exe /d\"C:\Users\Admin\AppData\Local\Temp\7f1c5f0b80a77bd27bcd5461b0634156017305a85eb56fb09ea8404e67beb449.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3052
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description feheevbe "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3128
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start feheevbe
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:248
- 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:5228

C:\Windows\SysWOW64\feheevbe\sxtljmy.exe
C:\Windows\SysWOW64\feheevbe\sxtljmy.exe /d"C:\Users\Admin\AppData\Local\Temp\7f1c5f0b80a77bd27bcd5461b0634156017305a85eb56fb09ea8404e67beb449.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5136
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  PID:3504

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Windows Command Shell

1

T1059.003

System Services

1

T1569

Service Execution

1

T1569.002

Persistence

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

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

1

T1562.004

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

sxtljmy.exe

Path C:\Users\Admin\AppData\Local\Temp\sxtljmy.exe
Size 12.9MB
SHA256 179bc344b6bf67d1ceba095d1a0baa715644de848aa2f5796d70b11d4a3ed13a
MD5 81d0983d94c5328ad5701e38f32a924b
SHA1 5046be38d0152593ca40e86b14a574670cfd4bd4
SHA512 dda7f7435b18f99792f71994be47f145d54d67ba8f8a0848326ed83e3aa8196e51cb01e5a72a22b1b7bd26d55864056ffd7db71b2f9c8c3d8065f9df55d8952f
SSDEEP 49152:TlpsCDrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrH:T/
TLSH
T199D641AA76BA5ED6D08A0B3C0CB1D5174EACF634083A597251D140CF58EE2CAD73CBB5
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/3504-6-0x0000000000800000-0x0000000000847000-memory.dmp

Download

memory/4680-0-0x0000000000400000-0x0000000000447000-memory.dmp

Download

memory/4680-10-0x0000000000400000-0x0000000000447000-memory.dmp

Download

memory/5136-5-0x0000000000400000-0x0000000000447000-memory.dmp

Download

memory/5136-7-0x0000000000400000-0x0000000000447000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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