tofsee | 2c434fce48945d04ddc4be557f2ec286a80e73596e404a369ec91e89379a8d17

Analysis

max time kernel
148s
max time network
149s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
26/12/2024, 21:28

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General

Target

fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c.exe
Size

246KB
MD5

6bdec1b519e961a4d757be0541c6e343
SHA1

fc1208a0eacf1e21f0199d7748292c8a5a114f0f
SHA256

fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c
SHA512

c9d4eb8560410d480b8724ca2ef8c9681ea849c65497ffb2b89884cab65265269d03fc2b434b77b5a2b64cd3eebdd8f8dde18334b9fbea3f5783cbb9972bf406
SSDEEP

3072:v036cBx3W3XK0mC5WcvmiK3dmXsxkgaBChhqLQV:HXK0DkYNABigaQq8V

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

patmushta.info

ovicrush.cn

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\oekdspvn = "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
2896	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\oekdspvn\ImagePath = "C:\\Windows\\SysWOW64\\oekdspvn\\hremwquv.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2128	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2848	hremwquv.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2848 set thread context of 2128	2848	hremwquv.exe	44

Launches sc.exe 3 IoCs

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

pid	Process
2744	sc.exe
2708	sc.exe
2928	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	fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.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	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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	hremwquv.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2504 wrote to memory of 2920	2504	fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c.exe	30
PID 2504 wrote to memory of 2920	2504	fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c.exe	30
PID 2504 wrote to memory of 2920	2504	fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c.exe	30
PID 2504 wrote to memory of 2920	2504	fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c.exe	30
PID 2504 wrote to memory of 2696	2504	fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c.exe	32
PID 2504 wrote to memory of 2696	2504	fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c.exe	32
PID 2504 wrote to memory of 2696	2504	fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c.exe	32
PID 2504 wrote to memory of 2696	2504	fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c.exe	32
PID 2504 wrote to memory of 2744	2504	fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c.exe	34
PID 2504 wrote to memory of 2744	2504	fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c.exe	34
PID 2504 wrote to memory of 2744	2504	fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c.exe	34
PID 2504 wrote to memory of 2744	2504	fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c.exe	34
PID 2504 wrote to memory of 2708	2504	fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c.exe	36
PID 2504 wrote to memory of 2708	2504	fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c.exe	36
PID 2504 wrote to memory of 2708	2504	fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c.exe	36
PID 2504 wrote to memory of 2708	2504	fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c.exe	36
PID 2504 wrote to memory of 2928	2504	fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c.exe	38
PID 2504 wrote to memory of 2928	2504	fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c.exe	38
PID 2504 wrote to memory of 2928	2504	fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c.exe	38
PID 2504 wrote to memory of 2928	2504	fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c.exe	38
PID 2504 wrote to memory of 2896	2504	fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c.exe	41
PID 2504 wrote to memory of 2896	2504	fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c.exe	41
PID 2504 wrote to memory of 2896	2504	fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c.exe	41
PID 2504 wrote to memory of 2896	2504	fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c.exe	41
PID 2848 wrote to memory of 2128	2848	hremwquv.exe	44
PID 2848 wrote to memory of 2128	2848	hremwquv.exe	44
PID 2848 wrote to memory of 2128	2848	hremwquv.exe	44
PID 2848 wrote to memory of 2128	2848	hremwquv.exe	44
PID 2848 wrote to memory of 2128	2848	hremwquv.exe	44
PID 2848 wrote to memory of 2128	2848	hremwquv.exe	44

C:\Users\Admin\AppData\Local\Temp\fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c.exe
"C:\Users\Admin\AppData\Local\Temp\fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2504
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\oekdspvn\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2920
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\hremwquv.exe" C:\Windows\SysWOW64\oekdspvn\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2696
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create oekdspvn binPath= "C:\Windows\SysWOW64\oekdspvn\hremwquv.exe /d\"C:\Users\Admin\AppData\Local\Temp\fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2744
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description oekdspvn "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2708
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start oekdspvn
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2928
- 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:2896

C:\Windows\SysWOW64\oekdspvn\hremwquv.exe
C:\Windows\SysWOW64\oekdspvn\hremwquv.exe /d"C:\Users\Admin\AppData\Local\Temp\fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2848
- 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:2128

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\hremwquv.exe

Filesize
14.2MB

MD5
40147f202d56e98617e7af0fe187a3d6

SHA1
3d7417219ce004bab82bde4cf6dde0b3ee67d293

SHA256
8a41b3fb4fc46c5dc09e52c2223dbd2cb01d9c5e9d9cd8da29202a8d2c67256d

SHA512
7b23eb099c1a77750a6bbb19eab1f91bacad1d255d1d87754f39a7a40830f68809d7eaebd36e5f05767b85219d02d787858ef27161c16194543c0723b4bbabbf

Download Submit
memory/2128-13-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2128-10-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2128-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2128-16-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2128-17-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2504-2-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2504-1-0x0000000000230000-0x0000000000243000-memory.dmp

Filesize
76KB

Download
memory/2504-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2504-8-0x0000000000230000-0x0000000000243000-memory.dmp

Filesize
76KB

Download
memory/2504-7-0x0000000000220000-0x000000000022D000-memory.dmp

Filesize
52KB

Download
memory/2504-6-0x0000000000400000-0x0000000000656000-memory.dmp

Filesize
2.3MB

Download
memory/2504-0-0x0000000000220000-0x000000000022D000-memory.dmp

Filesize
52KB

Download
memory/2848-14-0x0000000000400000-0x0000000000656000-memory.dmp

Filesize
2.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads