tofsee | 1d0276aa6842ab14d2c0343d3d78454c34dfa3ca140f49ee6e3579bd9734bc1d

Analysis

max time kernel
150s
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
02/04/2024, 00:05

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General

Target
7e074b12f3605bffcefa4060e08003e2_JaffaCakes118.exe
Size 14.4MB
Sample240402-adaefsag8w
SHA256 1d0276aa6842ab14d2c0343d3d78454c34dfa3ca140f49ee6e3579bd9734bc1d
MD5 7e074b12f3605bffcefa4060e08003e2
SHA1 5c653b2ef1c47e3f45e022c6dad31bebfa310c42
SHA512 231f1805345d585a8e741a4b7f0b23092e8cc22ac13d613703bb53944ec8659bac6d68dca66b5c8b8e6d7dc701f69e106f0cbb6aa33a2c24848b4bc067a93125
SSDEEP 6144:engjLKfnGE+Nj43Gd/50NS0UG4th+d49EOVVVVVVVVVVVVVVVVVVVVVVVVVVVVV7:ZiOE+Nj4Q50k0UGIh+dJ
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
2252	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\uczstfsm\ImagePath = "C:\\Windows\\SysWOW64\\uczstfsm\\sxtljmy.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-1-5-21-399997616-3400990511-967324271-1000\Control Panel\International\Geo\Nation	7e074b12f3605bffcefa4060e08003e2_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
952	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4808	sxtljmy.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4808 set thread context of 952	4808	sxtljmy.exe	107

Launches sc.exe 3 IoCs

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

pid	Process
1372	sc.exe
4932	sc.exe
5012	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
2544	1712	WerFault.exe	84
3960	4808	WerFault.exe	100

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1712 wrote to memory of 2208	1712	7e074b12f3605bffcefa4060e08003e2_JaffaCakes118.exe	88
PID 1712 wrote to memory of 2208	1712	7e074b12f3605bffcefa4060e08003e2_JaffaCakes118.exe	88
PID 1712 wrote to memory of 2208	1712	7e074b12f3605bffcefa4060e08003e2_JaffaCakes118.exe	88
PID 1712 wrote to memory of 632	1712	7e074b12f3605bffcefa4060e08003e2_JaffaCakes118.exe	90
PID 1712 wrote to memory of 632	1712	7e074b12f3605bffcefa4060e08003e2_JaffaCakes118.exe	90
PID 1712 wrote to memory of 632	1712	7e074b12f3605bffcefa4060e08003e2_JaffaCakes118.exe	90
PID 1712 wrote to memory of 1372	1712	7e074b12f3605bffcefa4060e08003e2_JaffaCakes118.exe	92
PID 1712 wrote to memory of 1372	1712	7e074b12f3605bffcefa4060e08003e2_JaffaCakes118.exe	92
PID 1712 wrote to memory of 1372	1712	7e074b12f3605bffcefa4060e08003e2_JaffaCakes118.exe	92
PID 1712 wrote to memory of 4932	1712	7e074b12f3605bffcefa4060e08003e2_JaffaCakes118.exe	94
PID 1712 wrote to memory of 4932	1712	7e074b12f3605bffcefa4060e08003e2_JaffaCakes118.exe	94
PID 1712 wrote to memory of 4932	1712	7e074b12f3605bffcefa4060e08003e2_JaffaCakes118.exe	94
PID 1712 wrote to memory of 5012	1712	7e074b12f3605bffcefa4060e08003e2_JaffaCakes118.exe	98
PID 1712 wrote to memory of 5012	1712	7e074b12f3605bffcefa4060e08003e2_JaffaCakes118.exe	98
PID 1712 wrote to memory of 5012	1712	7e074b12f3605bffcefa4060e08003e2_JaffaCakes118.exe	98
PID 1712 wrote to memory of 2252	1712	7e074b12f3605bffcefa4060e08003e2_JaffaCakes118.exe	101
PID 1712 wrote to memory of 2252	1712	7e074b12f3605bffcefa4060e08003e2_JaffaCakes118.exe	101
PID 1712 wrote to memory of 2252	1712	7e074b12f3605bffcefa4060e08003e2_JaffaCakes118.exe	101
PID 4808 wrote to memory of 952	4808	sxtljmy.exe	107
PID 4808 wrote to memory of 952	4808	sxtljmy.exe	107
PID 4808 wrote to memory of 952	4808	sxtljmy.exe	107
PID 4808 wrote to memory of 952	4808	sxtljmy.exe	107
PID 4808 wrote to memory of 952	4808	sxtljmy.exe	107

C:\Users\Admin\AppData\Local\Temp\7e074b12f3605bffcefa4060e08003e2_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\7e074b12f3605bffcefa4060e08003e2_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1712
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\uczstfsm\
  2⤵
  PID:2208
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\sxtljmy.exe" C:\Windows\SysWOW64\uczstfsm\
  2⤵
  PID:632
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create uczstfsm binPath= "C:\Windows\SysWOW64\uczstfsm\sxtljmy.exe /d\"C:\Users\Admin\AppData\Local\Temp\7e074b12f3605bffcefa4060e08003e2_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:1372
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description uczstfsm "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:4932
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start uczstfsm
  2⤵
  - Launches sc.exe
  PID:5012
- 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:2252
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1712 -s 680
  2⤵
  - Program crash
  PID:2544

C:\Windows\SysWOW64\uczstfsm\sxtljmy.exe
C:\Windows\SysWOW64\uczstfsm\sxtljmy.exe /d"C:\Users\Admin\AppData\Local\Temp\7e074b12f3605bffcefa4060e08003e2_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4808
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:952
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4808 -s 520
  2⤵
  - Program crash
  PID:3960

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 1712 -ip 1712
1⤵
PID:4248

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 4808 -ip 4808
1⤵
PID:1820

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

sxtljmy.exe

Path C:\Users\Admin\AppData\Local\Temp\sxtljmy.exe
Size 10.6MB
SHA256 4be47c6387bed4527a0beedfe1b06ee456f43f422306e1f26c2ccb9ae7b7a738
MD5 cb20209a5d44735ca47f60e8a3eddc1b
SHA1 d1376dff5014a07be2f499c9f03bccf056a4f008
SHA512 a6f794b205f5268d24e2e472adca0e353044f40455b35369611da2f8a3d1f3b784635f27253c2f35f63bf823d1d093739a639b2c10afabb2f088e5e3bbb1f02c
SSDEEP 6144:MngjLKfnGE+Nj43Gd/50NS0UG4th+d49EOVVVVVVVVVVVVVVVVVVVVVVVVVVVVVx:HiOE+Nj4Q50k0UGIh+dJ
MD5 SHA1 SHA512 SSDEEP

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memory/952-10-0x0000000000950000-0x0000000000965000-memory.dmp

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memory/952-15-0x0000000000950000-0x0000000000965000-memory.dmp

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memory/952-16-0x0000000000950000-0x0000000000965000-memory.dmp

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memory/952-18-0x0000000000950000-0x0000000000965000-memory.dmp

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memory/1712-1-0x00000000019F0000-0x0000000001AF0000-memory.dmp

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memory/1712-3-0x00000000034D0000-0x00000000034E3000-memory.dmp

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memory/1712-4-0x0000000000400000-0x0000000001782000-memory.dmp

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memory/1712-8-0x0000000000400000-0x0000000001782000-memory.dmp

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memory/4808-9-0x0000000001A20000-0x0000000001B20000-memory.dmp

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memory/4808-13-0x0000000000400000-0x0000000001782000-memory.dmp

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memory/4808-17-0x0000000000400000-0x0000000001782000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads