tofsee | 4196bd907e8b0673e0a37df064d0b4586e94e92880aede28c5d3a6163f1db7ca

General

Target
4196bd907e8b0673e0a37df064d0b4586e94e92880aede28c5d3a6163f1db7ca.exe
Size 12.6MB
Sample261111-ngfbrsgw7x
SHA256 4196bd907e8b0673e0a37df064d0b4586e94e92880aede28c5d3a6163f1db7ca
MD5 ca0bc2837713d89a295117f579de8397
SHA1 878908a6113e084a74988927f68ea9d933b38fce
SHA512 09fe8e46baec213ad8a3abe6b23b2564265acb4278a2b2b88db2c4803263cf326c683b38b32b6a6d59e47c257a48dab12a93c95c5c365ed84a7c86730815f2fb
SSDEEP 49152:Rlp+5rvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrv3:RW
TLSH
T184D6436676D86ED9D0CA0FBC09A1C42B5DECFB34043A553096D1504F98AE78A973CBB3
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
1412	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
4956	zlsmrxks.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4956 set thread context of 5948	4956	zlsmrxks.exe	101

Launches sc.exe 3 IoCs

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

pid	Process
4824	sc.exe
1256	sc.exe
5976	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
4308	cmd.exe
3428	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	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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	zlsmrxks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	4196bd907e8b0673e0a37df064d0b4586e94e92880aede28c5d3a6163f1db7ca.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2040 wrote to memory of 4308	2040	4196bd907e8b0673e0a37df064d0b4586e94e92880aede28c5d3a6163f1db7ca.exe	89
PID 2040 wrote to memory of 3428	2040	4196bd907e8b0673e0a37df064d0b4586e94e92880aede28c5d3a6163f1db7ca.exe	91
PID 2040 wrote to memory of 4824	2040	4196bd907e8b0673e0a37df064d0b4586e94e92880aede28c5d3a6163f1db7ca.exe	93
PID 2040 wrote to memory of 1256	2040	4196bd907e8b0673e0a37df064d0b4586e94e92880aede28c5d3a6163f1db7ca.exe	95
PID 2040 wrote to memory of 5976	2040	4196bd907e8b0673e0a37df064d0b4586e94e92880aede28c5d3a6163f1db7ca.exe	98
PID 4956 wrote to memory of 5948	4956	zlsmrxks.exe	101
PID 4956 wrote to memory of 5948	4956	zlsmrxks.exe	101
PID 2040 wrote to memory of 1412	2040	4196bd907e8b0673e0a37df064d0b4586e94e92880aede28c5d3a6163f1db7ca.exe	102

C:\Users\Admin\AppData\Local\Temp\4196bd907e8b0673e0a37df064d0b4586e94e92880aede28c5d3a6163f1db7ca.exe
"C:\Users\Admin\AppData\Local\Temp\4196bd907e8b0673e0a37df064d0b4586e94e92880aede28c5d3a6163f1db7ca.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2040
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\tczppxf\
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  PID:4308
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\zlsmrxks.exe" C:\Windows\SysWOW64\tczppxf\
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  PID:3428
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create tczppxf binPath= "C:\Windows\SysWOW64\tczppxf\zlsmrxks.exe /d\"C:\Users\Admin\AppData\Local\Temp\4196bd907e8b0673e0a37df064d0b4586e94e92880aede28c5d3a6163f1db7ca.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4824
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description tczppxf "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1256
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start tczppxf
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:5976
- 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:1412

C:\Windows\SysWOW64\tczppxf\zlsmrxks.exe
C:\Windows\SysWOW64\tczppxf\zlsmrxks.exe /d"C:\Users\Admin\AppData\Local\Temp\4196bd907e8b0673e0a37df064d0b4586e94e92880aede28c5d3a6163f1db7ca.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4956
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  PID:5948

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

Replay Monitor

Loading Replay Monitor...

Downloads

zlsmrxks.exe

Path C:\Users\Admin\AppData\Local\Temp\zlsmrxks.exe
Size 12.3MB
SHA256 de2e75effd69676ad27a8bc781665c25ec92f39fb65448037dab6fe88f25f80a
MD5 f1550b4d53516d132afc09f14522e42d
SHA1 9168e53a3d5339641a312375695251198e94d810
SHA512 408a056a6e1796526661c0898b29e0f082809649ed1d9955c72c807a6b55fac81af28e72ef8c5989599d33f64aecbb8b3535e5e9a0587eaac6a1b41b981bcb7e
SSDEEP 49152:dlp+5rvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvT:dW
TLSH
T106D6436676D86ED9D0CA0FBC09A1C42B5DECFB34043A553096D1504F98AE78A973CBB3
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2040-0-0x0000000000400000-0x0000000000449000-memory.dmp

Download

memory/2040-10-0x0000000000400000-0x0000000000449000-memory.dmp

Download

memory/4956-5-0x0000000000400000-0x0000000000449000-memory.dmp

Download

memory/4956-9-0x0000000000400000-0x0000000000449000-memory.dmp

Download

memory/5948-6-0x00000000010E0000-0x0000000001129000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

Replay Monitor

Loading Replay Monitor...

Downloads