tofsee | 4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179

Analysis

max time kernel
148s
max time network
156s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
23-11-2024 14:05

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General

Target

4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.exe
Size

14.9MB
MD5

ba9e3af2c7d730fa19561efec03a010b
SHA1

27b233843d99bb472e12080564613cf356e4a6a1
SHA256

4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179
SHA512

3c98f8d2a528f34a9aae207df7cc1dc893746baf417a7f28c822197c853fbbedc6dfcea149d50c0ebc6e754f985263eb3ec15f2134bce1e23b04d950c6a4363d
SSDEEP

196608:bpWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWk:d

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

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

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\SysWOW64\viiwjnwt = "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
2792	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\viiwjnwt\ImagePath = "C:\\Windows\\SysWOW64\\viiwjnwt\\mixxcjpg.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2572	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2636	mixxcjpg.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2636 set thread context of 2572	2636	mixxcjpg.exe	44

Launches sc.exe 3 IoCs

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

pid	Process
2732	sc.exe
2524	sc.exe
1940	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

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	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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.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	mixxcjpg.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2460 wrote to memory of 2596	2460	4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.exe	31
PID 2460 wrote to memory of 2596	2460	4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.exe	31
PID 2460 wrote to memory of 2596	2460	4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.exe	31
PID 2460 wrote to memory of 2596	2460	4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.exe	31
PID 2460 wrote to memory of 796	2460	4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.exe	33
PID 2460 wrote to memory of 796	2460	4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.exe	33
PID 2460 wrote to memory of 796	2460	4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.exe	33
PID 2460 wrote to memory of 796	2460	4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.exe	33
PID 2460 wrote to memory of 1940	2460	4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.exe	35
PID 2460 wrote to memory of 1940	2460	4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.exe	35
PID 2460 wrote to memory of 1940	2460	4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.exe	35
PID 2460 wrote to memory of 1940	2460	4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.exe	35
PID 2460 wrote to memory of 2732	2460	4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.exe	37
PID 2460 wrote to memory of 2732	2460	4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.exe	37
PID 2460 wrote to memory of 2732	2460	4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.exe	37
PID 2460 wrote to memory of 2732	2460	4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.exe	37
PID 2460 wrote to memory of 2524	2460	4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.exe	39
PID 2460 wrote to memory of 2524	2460	4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.exe	39
PID 2460 wrote to memory of 2524	2460	4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.exe	39
PID 2460 wrote to memory of 2524	2460	4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.exe	39
PID 2460 wrote to memory of 2792	2460	4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.exe	42
PID 2460 wrote to memory of 2792	2460	4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.exe	42
PID 2460 wrote to memory of 2792	2460	4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.exe	42
PID 2460 wrote to memory of 2792	2460	4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.exe	42
PID 2636 wrote to memory of 2572	2636	mixxcjpg.exe	44
PID 2636 wrote to memory of 2572	2636	mixxcjpg.exe	44
PID 2636 wrote to memory of 2572	2636	mixxcjpg.exe	44
PID 2636 wrote to memory of 2572	2636	mixxcjpg.exe	44
PID 2636 wrote to memory of 2572	2636	mixxcjpg.exe	44
PID 2636 wrote to memory of 2572	2636	mixxcjpg.exe	44

C:\Users\Admin\AppData\Local\Temp\4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.exe
"C:\Users\Admin\AppData\Local\Temp\4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2460
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\viiwjnwt\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2596
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\mixxcjpg.exe" C:\Windows\SysWOW64\viiwjnwt\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:796
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create viiwjnwt binPath= "C:\Windows\SysWOW64\viiwjnwt\mixxcjpg.exe /d\"C:\Users\Admin\AppData\Local\Temp\4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1940
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description viiwjnwt "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2732
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start viiwjnwt
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2524
- 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:2792

C:\Windows\SysWOW64\viiwjnwt\mixxcjpg.exe
C:\Windows\SysWOW64\viiwjnwt\mixxcjpg.exe /d"C:\Users\Admin\AppData\Local\Temp\4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2636
- 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:2572

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\mixxcjpg.exe

Filesize
12.2MB

MD5
2a41f59866372b3422de69bd27439f5e

SHA1
b7ea0db1a4c27562b193a122ecca62c78aa4d12c

SHA256
da5d2871e18e3899e3132692e656afdb4f5cd646efafc401b798e42363067c04

SHA512
1b35dd110c7da4b500e7c1f5de81ad6d225671244dd01ee779e3210f31a6b81296b90e5cea74b93d5c50c8ffcd5f77bcad5a789101c5e7222fd18379ca24b0f0

Download Submit
memory/2460-8-0x0000000000400000-0x0000000002F0D000-memory.dmp

Filesize
43.1MB

Download
memory/2460-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2460-2-0x00000000003C0000-0x00000000003D3000-memory.dmp

Filesize
76KB

Download
memory/2460-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2460-9-0x00000000003C0000-0x00000000003D3000-memory.dmp

Filesize
76KB

Download
memory/2460-1-0x0000000003350000-0x0000000003450000-memory.dmp

Filesize
1024KB

Download
memory/2572-11-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2572-14-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2572-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2572-17-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2572-18-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2636-15-0x0000000000400000-0x0000000002F0D000-memory.dmp

Filesize
43.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads