tofsee | d26320c9bf38d0c8da62667729d9c28c8c9a71bb1395bf33dff11b59cda8f6c4

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
30/03/2024, 03:46

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General

Target
32cbda26c9835c1c63f2fed688fb5bb9_JaffaCakes118.exe
Size 10.6MB
Sample240330-eb5vssgh99
SHA256 d26320c9bf38d0c8da62667729d9c28c8c9a71bb1395bf33dff11b59cda8f6c4
MD5 32cbda26c9835c1c63f2fed688fb5bb9
SHA1 1b8b5445b2ff31e5377c0a2297672bf656695777
SHA512 34246c7b622d4ff88c401d25da883962dfba46c878bf9387f3b72942add8ccfe1785b4c5dfbacfcbbc1a3f40e866cc701ce2ff8f2334868ae16b150e61de4e5e
SSDEEP 12288:KQeoegEG/Rl1M7jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjz:KQeGX1M
MD5 SHA1 SHA512 SSDEEP

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
Creates new service(s) 1 TTPs
persistence

Windows Service
T1543.003

Modifies Windows Firewall 2 TTPs 1 IoCs

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
4156	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\fwxqcqux\ImagePath = "C:\\Windows\\SysWOW64\\fwxqcqux\\fzvbmwou.exe"	svchost.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3270530367-132075249-2153716227-1000\Control Panel\International\Geo\Nation	32cbda26c9835c1c63f2fed688fb5bb9_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
4420	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1732	fzvbmwou.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1732 set thread context of 4420	1732	fzvbmwou.exe	109

Launches sc.exe 3 IoCs

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

pid	Process
5116	sc.exe
3660	sc.exe
452	sc.exe

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

System Information Discovery
T1082

Program crash 2 IoCs

pid	pid_target	Process	procid_target
3936	1092	WerFault.exe	85
4272	1732	WerFault.exe	103

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1092 wrote to memory of 5012	1092	32cbda26c9835c1c63f2fed688fb5bb9_JaffaCakes118.exe	89
PID 1092 wrote to memory of 5012	1092	32cbda26c9835c1c63f2fed688fb5bb9_JaffaCakes118.exe	89
PID 1092 wrote to memory of 5012	1092	32cbda26c9835c1c63f2fed688fb5bb9_JaffaCakes118.exe	89
PID 1092 wrote to memory of 5008	1092	32cbda26c9835c1c63f2fed688fb5bb9_JaffaCakes118.exe	93
PID 1092 wrote to memory of 5008	1092	32cbda26c9835c1c63f2fed688fb5bb9_JaffaCakes118.exe	93
PID 1092 wrote to memory of 5008	1092	32cbda26c9835c1c63f2fed688fb5bb9_JaffaCakes118.exe	93
PID 1092 wrote to memory of 5116	1092	32cbda26c9835c1c63f2fed688fb5bb9_JaffaCakes118.exe	95
PID 1092 wrote to memory of 5116	1092	32cbda26c9835c1c63f2fed688fb5bb9_JaffaCakes118.exe	95
PID 1092 wrote to memory of 5116	1092	32cbda26c9835c1c63f2fed688fb5bb9_JaffaCakes118.exe	95
PID 1092 wrote to memory of 3660	1092	32cbda26c9835c1c63f2fed688fb5bb9_JaffaCakes118.exe	99
PID 1092 wrote to memory of 3660	1092	32cbda26c9835c1c63f2fed688fb5bb9_JaffaCakes118.exe	99
PID 1092 wrote to memory of 3660	1092	32cbda26c9835c1c63f2fed688fb5bb9_JaffaCakes118.exe	99
PID 1092 wrote to memory of 452	1092	32cbda26c9835c1c63f2fed688fb5bb9_JaffaCakes118.exe	101
PID 1092 wrote to memory of 452	1092	32cbda26c9835c1c63f2fed688fb5bb9_JaffaCakes118.exe	101
PID 1092 wrote to memory of 452	1092	32cbda26c9835c1c63f2fed688fb5bb9_JaffaCakes118.exe	101
PID 1092 wrote to memory of 4156	1092	32cbda26c9835c1c63f2fed688fb5bb9_JaffaCakes118.exe	104
PID 1092 wrote to memory of 4156	1092	32cbda26c9835c1c63f2fed688fb5bb9_JaffaCakes118.exe	104
PID 1092 wrote to memory of 4156	1092	32cbda26c9835c1c63f2fed688fb5bb9_JaffaCakes118.exe	104
PID 1732 wrote to memory of 4420	1732	fzvbmwou.exe	109
PID 1732 wrote to memory of 4420	1732	fzvbmwou.exe	109
PID 1732 wrote to memory of 4420	1732	fzvbmwou.exe	109
PID 1732 wrote to memory of 4420	1732	fzvbmwou.exe	109
PID 1732 wrote to memory of 4420	1732	fzvbmwou.exe	109

C:\Users\Admin\AppData\Local\Temp\32cbda26c9835c1c63f2fed688fb5bb9_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\32cbda26c9835c1c63f2fed688fb5bb9_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1092
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\fwxqcqux\
  2⤵
  PID:5012
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\fzvbmwou.exe" C:\Windows\SysWOW64\fwxqcqux\
  2⤵
  PID:5008
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create fwxqcqux binPath= "C:\Windows\SysWOW64\fwxqcqux\fzvbmwou.exe /d\"C:\Users\Admin\AppData\Local\Temp\32cbda26c9835c1c63f2fed688fb5bb9_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:5116
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description fwxqcqux "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:3660
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start fwxqcqux
  2⤵
  - Launches sc.exe
  PID:452
- 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:4156
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1092 -s 1036
  2⤵
  - Program crash
  PID:3936

C:\Windows\SysWOW64\fwxqcqux\fzvbmwou.exe
C:\Windows\SysWOW64\fwxqcqux\fzvbmwou.exe /d"C:\Users\Admin\AppData\Local\Temp\32cbda26c9835c1c63f2fed688fb5bb9_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1732
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:4420
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1732 -s 512
  2⤵
  - Program crash
  PID:4272

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 1092 -ip 1092
1⤵
PID:3432

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1732 -ip 1732
1⤵
PID:2472

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 System Firewall

T1562.004

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

fzvbmwou.exe

Path C:\Users\Admin\AppData\Local\Temp\fzvbmwou.exe
Size 10.3MB
SHA256 eb0a8bd06f5451f54507521e028515356bde1cd5783f40ad1af60f1fefe8ed9d
MD5 bd490e1d6c534f27077c9ef613229d13
SHA1 472531981b1236289d00f30a3d4546379d3d86d4
SHA512 1c8c283b6459e92d7a636077f6957f04dcc55047e571c1191b02f34b61256c875e9d2f959a939cc0cbad960bb3db11f1d7c961ae00561e2cf77cff150205061b
SSDEEP 12288:HQeoegEG/Rl1M7jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjH:HQeGX1M
MD5 SHA1 SHA512 SSDEEP

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memory/1092-1-0x0000000000AE0000-0x0000000000BE0000-memory.dmp

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memory/1092-2-0x00000000009F0000-0x0000000000A03000-memory.dmp

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memory/1092-4-0x0000000000400000-0x000000000086A000-memory.dmp

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memory/1092-8-0x0000000000400000-0x000000000086A000-memory.dmp

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memory/1092-9-0x00000000009F0000-0x0000000000A03000-memory.dmp

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memory/1732-10-0x0000000000A40000-0x0000000000B40000-memory.dmp

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memory/1732-11-0x0000000000400000-0x000000000086A000-memory.dmp

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memory/1732-15-0x0000000000400000-0x000000000086A000-memory.dmp

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memory/4420-12-0x0000000000FC0000-0x0000000000FD5000-memory.dmp

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memory/4420-17-0x0000000000FC0000-0x0000000000FD5000-memory.dmp

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memory/4420-18-0x0000000000FC0000-0x0000000000FD5000-memory.dmp

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memory/4420-19-0x0000000000FC0000-0x0000000000FD5000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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