tofsee | d5765dff5690f5f9a337c9fa0047b8c58e9f2ec2b6211f8482d57c5bf251308c

Analysis

max time kernel
146s
max time network
149s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
02-09-2024 00:24

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General

Target

23f1145599ca4f2836be5ba2ef445c06709df2e71dc30d6cd534b60810673716.exe
Size

11.3MB
MD5

d318dc7b92c68cddb6ac8e82af8a7439
SHA1

c6fd11ca5e592b4992663d210b0c622e47c6697c
SHA256

23f1145599ca4f2836be5ba2ef445c06709df2e71dc30d6cd534b60810673716
SHA512

e44a44fe52d6017ef83aa569ca6c0277e0c8dd09f255e3b68fbbc032703ce8deee7f40c887abfe3feac291e63baa62e04098ad43ab15e2df3476cc731995c945
SSDEEP

98304:9EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEU:

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

defeatwax.ru

refabyd.info

Signatures

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

Windows security bypass 2 TTPs 1 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\SysWOW64\rmzdzfvk = "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

pid	Process
2736	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\rmzdzfvk\ImagePath = "C:\\Windows\\SysWOW64\\rmzdzfvk\\mkzlfbmc.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2708	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3024	mkzlfbmc.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3024 set thread context of 2708	3024	mkzlfbmc.exe	42

Launches sc.exe 3 IoCs

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

pid	Process
2756	sc.exe
1576	sc.exe
2740	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

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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	23f1145599ca4f2836be5ba2ef445c06709df2e71dc30d6cd534b60810673716.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	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	mkzlfbmc.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2524 wrote to memory of 2200	2524	23f1145599ca4f2836be5ba2ef445c06709df2e71dc30d6cd534b60810673716.exe	29
PID 2524 wrote to memory of 2200	2524	23f1145599ca4f2836be5ba2ef445c06709df2e71dc30d6cd534b60810673716.exe	29
PID 2524 wrote to memory of 2200	2524	23f1145599ca4f2836be5ba2ef445c06709df2e71dc30d6cd534b60810673716.exe	29
PID 2524 wrote to memory of 2200	2524	23f1145599ca4f2836be5ba2ef445c06709df2e71dc30d6cd534b60810673716.exe	29
PID 2524 wrote to memory of 2776	2524	23f1145599ca4f2836be5ba2ef445c06709df2e71dc30d6cd534b60810673716.exe	31
PID 2524 wrote to memory of 2776	2524	23f1145599ca4f2836be5ba2ef445c06709df2e71dc30d6cd534b60810673716.exe	31
PID 2524 wrote to memory of 2776	2524	23f1145599ca4f2836be5ba2ef445c06709df2e71dc30d6cd534b60810673716.exe	31
PID 2524 wrote to memory of 2776	2524	23f1145599ca4f2836be5ba2ef445c06709df2e71dc30d6cd534b60810673716.exe	31
PID 2524 wrote to memory of 2756	2524	23f1145599ca4f2836be5ba2ef445c06709df2e71dc30d6cd534b60810673716.exe	33
PID 2524 wrote to memory of 2756	2524	23f1145599ca4f2836be5ba2ef445c06709df2e71dc30d6cd534b60810673716.exe	33
PID 2524 wrote to memory of 2756	2524	23f1145599ca4f2836be5ba2ef445c06709df2e71dc30d6cd534b60810673716.exe	33
PID 2524 wrote to memory of 2756	2524	23f1145599ca4f2836be5ba2ef445c06709df2e71dc30d6cd534b60810673716.exe	33
PID 2524 wrote to memory of 1576	2524	23f1145599ca4f2836be5ba2ef445c06709df2e71dc30d6cd534b60810673716.exe	35
PID 2524 wrote to memory of 1576	2524	23f1145599ca4f2836be5ba2ef445c06709df2e71dc30d6cd534b60810673716.exe	35
PID 2524 wrote to memory of 1576	2524	23f1145599ca4f2836be5ba2ef445c06709df2e71dc30d6cd534b60810673716.exe	35
PID 2524 wrote to memory of 1576	2524	23f1145599ca4f2836be5ba2ef445c06709df2e71dc30d6cd534b60810673716.exe	35
PID 2524 wrote to memory of 2740	2524	23f1145599ca4f2836be5ba2ef445c06709df2e71dc30d6cd534b60810673716.exe	37
PID 2524 wrote to memory of 2740	2524	23f1145599ca4f2836be5ba2ef445c06709df2e71dc30d6cd534b60810673716.exe	37
PID 2524 wrote to memory of 2740	2524	23f1145599ca4f2836be5ba2ef445c06709df2e71dc30d6cd534b60810673716.exe	37
PID 2524 wrote to memory of 2740	2524	23f1145599ca4f2836be5ba2ef445c06709df2e71dc30d6cd534b60810673716.exe	37
PID 2524 wrote to memory of 2736	2524	23f1145599ca4f2836be5ba2ef445c06709df2e71dc30d6cd534b60810673716.exe	40
PID 2524 wrote to memory of 2736	2524	23f1145599ca4f2836be5ba2ef445c06709df2e71dc30d6cd534b60810673716.exe	40
PID 2524 wrote to memory of 2736	2524	23f1145599ca4f2836be5ba2ef445c06709df2e71dc30d6cd534b60810673716.exe	40
PID 2524 wrote to memory of 2736	2524	23f1145599ca4f2836be5ba2ef445c06709df2e71dc30d6cd534b60810673716.exe	40
PID 3024 wrote to memory of 2708	3024	mkzlfbmc.exe	42
PID 3024 wrote to memory of 2708	3024	mkzlfbmc.exe	42
PID 3024 wrote to memory of 2708	3024	mkzlfbmc.exe	42
PID 3024 wrote to memory of 2708	3024	mkzlfbmc.exe	42
PID 3024 wrote to memory of 2708	3024	mkzlfbmc.exe	42
PID 3024 wrote to memory of 2708	3024	mkzlfbmc.exe	42

C:\Users\Admin\AppData\Local\Temp\23f1145599ca4f2836be5ba2ef445c06709df2e71dc30d6cd534b60810673716.exe
"C:\Users\Admin\AppData\Local\Temp\23f1145599ca4f2836be5ba2ef445c06709df2e71dc30d6cd534b60810673716.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2524
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\rmzdzfvk\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2200
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\mkzlfbmc.exe" C:\Windows\SysWOW64\rmzdzfvk\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2776
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create rmzdzfvk binPath= "C:\Windows\SysWOW64\rmzdzfvk\mkzlfbmc.exe /d\"C:\Users\Admin\AppData\Local\Temp\23f1145599ca4f2836be5ba2ef445c06709df2e71dc30d6cd534b60810673716.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2756
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description rmzdzfvk "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1576
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start rmzdzfvk
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2740
- 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:2736

C:\Windows\SysWOW64\rmzdzfvk\mkzlfbmc.exe
C:\Windows\SysWOW64\rmzdzfvk\mkzlfbmc.exe /d"C:\Users\Admin\AppData\Local\Temp\23f1145599ca4f2836be5ba2ef445c06709df2e71dc30d6cd534b60810673716.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3024
- 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:2708

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

T1569

Service Execution

T1569.002

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Defense Evasion

Impair Defenses

T1562

Disable or Modify System Firewall

T1562.004

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\mkzlfbmc.exe

Filesize
13.0MB

MD5
c4d3b9592cb3f49aaa17f171c507bb85

SHA1
7b13390be262cb14731a031334fd9240915f4bba

SHA256
95abfcb68b41d9cf08ef8e92dc8f7bb84083a95a7b4a8a65d637a3503adedb52

SHA512
137de3766ac3da5a10ed01f8fc4cee9dd995e79ac213d660e00bd11e9642fbdffa0580977801cac318cb5749d534c367389c69c165a600369f6be6360297766f

Download Submit
memory/2524-8-0x0000000000400000-0x0000000000448000-memory.dmp

Filesize
288KB

Download
memory/2524-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2524-1-0x00000000005B0000-0x00000000006B0000-memory.dmp

Filesize
1024KB

Download
memory/2524-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2524-9-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/2524-2-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/2708-11-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2708-14-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2708-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2708-17-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2708-18-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/3024-15-0x0000000000400000-0x0000000000448000-memory.dmp

Filesize
288KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads