tofsee | ce01494008d505ee538796c5283d93f3b17c049ed3eb6097e77857e8ca938b6b

Analysis

max time kernel
150s
max time network
153s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
04-01-2024 07:41

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General

Target

404915212cf53138397c2505a845319a.exe
Size

11.1MB
MD5

404915212cf53138397c2505a845319a
SHA1

d845065469c5b28b4c4394b2f4c4eaf34b8405a7
SHA256

ce01494008d505ee538796c5283d93f3b17c049ed3eb6097e77857e8ca938b6b
SHA512

073cfec303442c6d221a958ef72a01810ebdf44f3d887d5d65073f0a02d77c37e1094cbf9a28ca892cd2d118cc2a0882fb694f426b5c3713993bcbf660366b3c
SSDEEP

24576:sjCj10HSqGgeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeev:s/D

Score

10^/10

tofsee evasion persistence 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\xvvdokqn = "0"	svchost.exe

Creates new service(s) 1 TTPs
persistence

Windows Service
T1543.003

Modifies Windows Firewall 1 TTPs 1 IoCs

evasion

Windows Service

T1543.003

pid	Process
2996	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\xvvdokqn\ImagePath = "C:\\Windows\\SysWOW64\\xvvdokqn\\woxfcpbv.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2916	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2888	woxfcpbv.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2888 set thread context of 2916	2888	woxfcpbv.exe	41

Launches sc.exe 3 IoCs

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

pid	Process
2772	sc.exe
2448	sc.exe
2832	sc.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2228 wrote to memory of 2052	2228	404915212cf53138397c2505a845319a.exe	28
PID 2228 wrote to memory of 2052	2228	404915212cf53138397c2505a845319a.exe	28
PID 2228 wrote to memory of 2052	2228	404915212cf53138397c2505a845319a.exe	28
PID 2228 wrote to memory of 2052	2228	404915212cf53138397c2505a845319a.exe	28
PID 2228 wrote to memory of 2296	2228	404915212cf53138397c2505a845319a.exe	30
PID 2228 wrote to memory of 2296	2228	404915212cf53138397c2505a845319a.exe	30
PID 2228 wrote to memory of 2296	2228	404915212cf53138397c2505a845319a.exe	30
PID 2228 wrote to memory of 2296	2228	404915212cf53138397c2505a845319a.exe	30
PID 2228 wrote to memory of 2772	2228	404915212cf53138397c2505a845319a.exe	32
PID 2228 wrote to memory of 2772	2228	404915212cf53138397c2505a845319a.exe	32
PID 2228 wrote to memory of 2772	2228	404915212cf53138397c2505a845319a.exe	32
PID 2228 wrote to memory of 2772	2228	404915212cf53138397c2505a845319a.exe	32
PID 2228 wrote to memory of 2448	2228	404915212cf53138397c2505a845319a.exe	34
PID 2228 wrote to memory of 2448	2228	404915212cf53138397c2505a845319a.exe	34
PID 2228 wrote to memory of 2448	2228	404915212cf53138397c2505a845319a.exe	34
PID 2228 wrote to memory of 2448	2228	404915212cf53138397c2505a845319a.exe	34
PID 2228 wrote to memory of 2832	2228	404915212cf53138397c2505a845319a.exe	36
PID 2228 wrote to memory of 2832	2228	404915212cf53138397c2505a845319a.exe	36
PID 2228 wrote to memory of 2832	2228	404915212cf53138397c2505a845319a.exe	36
PID 2228 wrote to memory of 2832	2228	404915212cf53138397c2505a845319a.exe	36
PID 2228 wrote to memory of 2996	2228	404915212cf53138397c2505a845319a.exe	40
PID 2228 wrote to memory of 2996	2228	404915212cf53138397c2505a845319a.exe	40
PID 2228 wrote to memory of 2996	2228	404915212cf53138397c2505a845319a.exe	40
PID 2228 wrote to memory of 2996	2228	404915212cf53138397c2505a845319a.exe	40
PID 2888 wrote to memory of 2916	2888	woxfcpbv.exe	41
PID 2888 wrote to memory of 2916	2888	woxfcpbv.exe	41
PID 2888 wrote to memory of 2916	2888	woxfcpbv.exe	41
PID 2888 wrote to memory of 2916	2888	woxfcpbv.exe	41
PID 2888 wrote to memory of 2916	2888	woxfcpbv.exe	41
PID 2888 wrote to memory of 2916	2888	woxfcpbv.exe	41

C:\Users\Admin\AppData\Local\Temp\404915212cf53138397c2505a845319a.exe
"C:\Users\Admin\AppData\Local\Temp\404915212cf53138397c2505a845319a.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2228
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\xvvdokqn\
  2⤵
  PID:2052
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\woxfcpbv.exe" C:\Windows\SysWOW64\xvvdokqn\
  2⤵
  PID:2296
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create xvvdokqn binPath= "C:\Windows\SysWOW64\xvvdokqn\woxfcpbv.exe /d\"C:\Users\Admin\AppData\Local\Temp\404915212cf53138397c2505a845319a.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:2772
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description xvvdokqn "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:2448
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start xvvdokqn
  2⤵
  - Launches sc.exe
  PID:2832
- 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
  PID:2996

C:\Windows\SysWOW64\xvvdokqn\woxfcpbv.exe
C:\Windows\SysWOW64\xvvdokqn\woxfcpbv.exe /d"C:\Users\Admin\AppData\Local\Temp\404915212cf53138397c2505a845319a.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2888
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Windows security bypass
  - Sets service image path in registry
  - Deletes itself
  PID:2916

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

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

Defense Evasion

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
2.3MB

MD5
bc9e6dd37e132c17763b413686ac143e

SHA1
3196451491159cc78ec1b1b9bf4de42b0b82b73c

SHA256
0a3260033b57b53df39e01a4a3377335a0d4df6e68fd6084ba99e7890fb7aa5c

SHA512
b78d0d3a36c8e139e1eeedbe50cd897776c941c74c0e9d5ba94a4ea3fedaa5680c868ae2a1b68d98d4307c651187cc7e511ccee061f767e2db219214a3fd9b08

Download Submit
C:\Windows\SysWOW64\xvvdokqn\woxfcpbv.exe

Filesize
538KB

MD5
11e2f26617bfbf3d15fc6bf6d9126d49

SHA1
6848e6b915cfafbccfe221177315b4322fe745cb

SHA256
083e1b6eb2e46f62e79b349f53c989b4269a34e1c566e2b2d8122e38520dc2af

SHA512
844f1b50997d242102a6a46871756b59310564f2a29b7853deb7c54cc897b8406b77f7707bbb63aaf50b566ef0dae04f139fd95cc92f8eaace1c5bea1aaf99de

Download Submit
memory/2228-8-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/2228-3-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/2228-2-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/2228-9-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/2228-1-0x0000000000560000-0x0000000000660000-memory.dmp

Filesize
1024KB

Download
memory/2888-15-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/2888-10-0x0000000000500000-0x0000000000600000-memory.dmp

Filesize
1024KB

Download
memory/2916-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2916-14-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2916-19-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2916-11-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2916-20-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2916-21-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads