tofsee | eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447

Analysis

max time kernel
118s
max time network
119s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
24-11-2024 04:08

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exe
Size

12.9MB
MD5

27bc92160d3d4e66f593e9f8f3023dff
SHA1

920930e48cc64142bdb9643b6f03152423f22fce
SHA256

eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447
SHA512

68dddd1252274b8d7c029f84128d9f16d2f78f72dc22c548c6f296efbf6893c5b26f04aa1eeda4c1f76f5dfb016fb274618c94dd6650992796a016aa52b989ed
SSDEEP

49152:nyzapZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ0:nCB

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

Processes:

svchost.exe

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

Processes:

netsh.exe

pid	Process
2668	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\baxcsjmt\ImagePath = "C:\\Windows\\SysWOW64\\baxcsjmt\\otdthm.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid	Process
2616	svchost.exe

Executes dropped EXE 1 IoCs

Processes:

otdthm.exe

pid	Process
2852	otdthm.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

otdthm.exe

description	pid	Process	procid_target
PID 2852 set thread context of 2616	2852	otdthm.exe	41

Launches sc.exe 3 IoCs

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

Processes:

sc.exesc.exesc.exe

pid	Process
2396	sc.exe
2240	sc.exe
1700	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

Processes:

netsh.exe

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

Processes:

eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exeotdthm.exesvchost.execmd.execmd.exesc.exesc.exesc.exenetsh.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	otdthm.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	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	netsh.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exeotdthm.exe

description	pid	Process	procid_target
PID 2292 wrote to memory of 2024	2292	eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exe	28
PID 2292 wrote to memory of 2024	2292	eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exe	28
PID 2292 wrote to memory of 2024	2292	eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exe	28
PID 2292 wrote to memory of 2024	2292	eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exe	28
PID 2292 wrote to memory of 1768	2292	eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exe	30
PID 2292 wrote to memory of 1768	2292	eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exe	30
PID 2292 wrote to memory of 1768	2292	eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exe	30
PID 2292 wrote to memory of 1768	2292	eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exe	30
PID 2292 wrote to memory of 2396	2292	eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exe	32
PID 2292 wrote to memory of 2396	2292	eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exe	32
PID 2292 wrote to memory of 2396	2292	eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exe	32
PID 2292 wrote to memory of 2396	2292	eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exe	32
PID 2292 wrote to memory of 2240	2292	eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exe	34
PID 2292 wrote to memory of 2240	2292	eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exe	34
PID 2292 wrote to memory of 2240	2292	eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exe	34
PID 2292 wrote to memory of 2240	2292	eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exe	34
PID 2292 wrote to memory of 1700	2292	eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exe	36
PID 2292 wrote to memory of 1700	2292	eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exe	36
PID 2292 wrote to memory of 1700	2292	eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exe	36
PID 2292 wrote to memory of 1700	2292	eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exe	36
PID 2292 wrote to memory of 2668	2292	eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exe	39
PID 2292 wrote to memory of 2668	2292	eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exe	39
PID 2292 wrote to memory of 2668	2292	eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exe	39
PID 2292 wrote to memory of 2668	2292	eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exe	39
PID 2852 wrote to memory of 2616	2852	otdthm.exe	41
PID 2852 wrote to memory of 2616	2852	otdthm.exe	41
PID 2852 wrote to memory of 2616	2852	otdthm.exe	41
PID 2852 wrote to memory of 2616	2852	otdthm.exe	41
PID 2852 wrote to memory of 2616	2852	otdthm.exe	41
PID 2852 wrote to memory of 2616	2852	otdthm.exe	41

C:\Users\Admin\AppData\Local\Temp\eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exe
"C:\Users\Admin\AppData\Local\Temp\eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2292
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\baxcsjmt\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2024
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\otdthm.exe" C:\Windows\SysWOW64\baxcsjmt\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1768
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create baxcsjmt binPath= "C:\Windows\SysWOW64\baxcsjmt\otdthm.exe /d\"C:\Users\Admin\AppData\Local\Temp\eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2396
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description baxcsjmt "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2240
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start baxcsjmt
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1700
- 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:2668

C:\Windows\SysWOW64\baxcsjmt\otdthm.exe
C:\Windows\SysWOW64\baxcsjmt\otdthm.exe /d"C:\Users\Admin\AppData\Local\Temp\eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2852
- 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:2616

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

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
11.9MB

MD5
8500999397d1af90eea88c09d003b1a3

SHA1
377542bd416ca9db1d27a00caa17a3ef21d39d7c

SHA256
ccebd7bf5e981705509e140768869debc46dd80c89b39b61ec16647fdc024377

SHA512
e8a6dc1910120e886afa53c1af47eaa143ff21875cad90b7a77f5bef518218c8228512cb5ffe459073b21f65d703462d178ceb7e65f0655931b3dc41c14fd4b5

Download Submit
memory/2292-9-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/2292-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2292-2-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/2292-8-0x0000000000400000-0x00000000016BD000-memory.dmp

Filesize
18.7MB

Download
memory/2292-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2292-1-0x00000000017B0000-0x00000000018B0000-memory.dmp

Filesize
1024KB

Download
memory/2616-14-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2616-16-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2616-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2616-11-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2616-18-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2852-17-0x0000000000400000-0x00000000016BD000-memory.dmp

Filesize
18.7MB

Download