tofsee | 592aae666394a3d72e7041676ddd615d31ca54f3a41c3c916580e2692b047ea9

Analysis

max time kernel
147s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
19/04/2024, 01:54

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General

Target
f93f672e45a5c1129aba812e94192a07_JaffaCakes118.exe
Size 14.4MB
Sample240419-cbr8laee81
SHA256 592aae666394a3d72e7041676ddd615d31ca54f3a41c3c916580e2692b047ea9
MD5 f93f672e45a5c1129aba812e94192a07
SHA1 595bed5941aa45c13e64f34f370072d28dda19ef
SHA512 32058e8d6b9c3710afa38bf9c9e5fa123cf2442a4de28df09b66ab3ac5fabad998c1bc29a4fec51f9d5dd6dfa80ca5bdb2dad08efca72e1861795cc1d7050632
SSDEEP 49152:+yqI2kmso555555555555555555555555555555555555555555555555555555h:+yqI2
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

43.231.4.7
lazystax.ru

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
4240	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\lvestcod\ImagePath = "C:\\Windows\\SysWOW64\\lvestcod\\tcwbtsnj.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-1-5-21-1826666146-2574340311-1877551059-1000\Control Panel\International\Geo\Nation	f93f672e45a5c1129aba812e94192a07_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
4792	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4712	tcwbtsnj.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\¤xu	tcwbtsnj.exe
File created	C:\Windows\SysWOW64\ä?t	tcwbtsnj.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4712 set thread context of 4792	4712	tcwbtsnj.exe	104

Launches sc.exe 3 IoCs

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

pid	Process
1824	sc.exe
1480	sc.exe
4524	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
1380	4324	WerFault.exe	83
4700	4712	WerFault.exe	99

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4324 wrote to memory of 1544	4324	f93f672e45a5c1129aba812e94192a07_JaffaCakes118.exe	87
PID 4324 wrote to memory of 1544	4324	f93f672e45a5c1129aba812e94192a07_JaffaCakes118.exe	87
PID 4324 wrote to memory of 1544	4324	f93f672e45a5c1129aba812e94192a07_JaffaCakes118.exe	87
PID 4324 wrote to memory of 3556	4324	f93f672e45a5c1129aba812e94192a07_JaffaCakes118.exe	89
PID 4324 wrote to memory of 3556	4324	f93f672e45a5c1129aba812e94192a07_JaffaCakes118.exe	89
PID 4324 wrote to memory of 3556	4324	f93f672e45a5c1129aba812e94192a07_JaffaCakes118.exe	89
PID 4324 wrote to memory of 1824	4324	f93f672e45a5c1129aba812e94192a07_JaffaCakes118.exe	91
PID 4324 wrote to memory of 1824	4324	f93f672e45a5c1129aba812e94192a07_JaffaCakes118.exe	91
PID 4324 wrote to memory of 1824	4324	f93f672e45a5c1129aba812e94192a07_JaffaCakes118.exe	91
PID 4324 wrote to memory of 1480	4324	f93f672e45a5c1129aba812e94192a07_JaffaCakes118.exe	94
PID 4324 wrote to memory of 1480	4324	f93f672e45a5c1129aba812e94192a07_JaffaCakes118.exe	94
PID 4324 wrote to memory of 1480	4324	f93f672e45a5c1129aba812e94192a07_JaffaCakes118.exe	94
PID 4324 wrote to memory of 4524	4324	f93f672e45a5c1129aba812e94192a07_JaffaCakes118.exe	97
PID 4324 wrote to memory of 4524	4324	f93f672e45a5c1129aba812e94192a07_JaffaCakes118.exe	97
PID 4324 wrote to memory of 4524	4324	f93f672e45a5c1129aba812e94192a07_JaffaCakes118.exe	97
PID 4324 wrote to memory of 4240	4324	f93f672e45a5c1129aba812e94192a07_JaffaCakes118.exe	100
PID 4324 wrote to memory of 4240	4324	f93f672e45a5c1129aba812e94192a07_JaffaCakes118.exe	100
PID 4324 wrote to memory of 4240	4324	f93f672e45a5c1129aba812e94192a07_JaffaCakes118.exe	100
PID 4712 wrote to memory of 4792	4712	tcwbtsnj.exe	104
PID 4712 wrote to memory of 4792	4712	tcwbtsnj.exe	104
PID 4712 wrote to memory of 4792	4712	tcwbtsnj.exe	104
PID 4712 wrote to memory of 4792	4712	tcwbtsnj.exe	104
PID 4712 wrote to memory of 4792	4712	tcwbtsnj.exe	104

C:\Users\Admin\AppData\Local\Temp\f93f672e45a5c1129aba812e94192a07_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f93f672e45a5c1129aba812e94192a07_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4324
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\lvestcod\
  2⤵
  PID:1544
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\tcwbtsnj.exe" C:\Windows\SysWOW64\lvestcod\
  2⤵
  PID:3556
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create lvestcod binPath= "C:\Windows\SysWOW64\lvestcod\tcwbtsnj.exe /d\"C:\Users\Admin\AppData\Local\Temp\f93f672e45a5c1129aba812e94192a07_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:1824
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description lvestcod "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:1480
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start lvestcod
  2⤵
  - Launches sc.exe
  PID:4524
- 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:4240
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4324 -s 1040
  2⤵
  - Program crash
  PID:1380

C:\Windows\SysWOW64\lvestcod\tcwbtsnj.exe
C:\Windows\SysWOW64\lvestcod\tcwbtsnj.exe /d"C:\Users\Admin\AppData\Local\Temp\f93f672e45a5c1129aba812e94192a07_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Drops file in System32 directory
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4712
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:4792
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4712 -s 516
  2⤵
  - Program crash
  PID:4700

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 4324 -ip 4324
1⤵
PID:428

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 180 -p 4712 -ip 4712
1⤵
PID:3740

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

tcwbtsnj.exe

Path C:\Users\Admin\AppData\Local\Temp\tcwbtsnj.exe
Size 10.4MB
SHA256 07beb554287a23eeb745cac87d02aa3e7ba3bba6bc4772c6543b23d7463cb8f9
MD5 69b768ad43fb11a78134dc707d7f99c9
SHA1 7f385ad2e156e1ffc5ed35e52b32e4c9531d071d
SHA512 07026cd7848288551530c2d1086cfadc2a77628fcf9aa38393344b4284451d0d544af9fc7d6b4d024039e1f54a709aab45dc990194fce00c8c7486922675f4a2
SSDEEP 49152:PyqI2kmso555555555555555555555555555555555555555555555555555555P:PyqI2
MD5 SHA1 SHA512 SSDEEP

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memory/4324-1-0x0000000000770000-0x0000000000870000-memory.dmp

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memory/4324-2-0x00000000006D0000-0x00000000006E3000-memory.dmp

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memory/4324-3-0x0000000000400000-0x000000000046E000-memory.dmp

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memory/4324-7-0x0000000000400000-0x000000000046E000-memory.dmp

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memory/4324-8-0x00000000006D0000-0x00000000006E3000-memory.dmp

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memory/4712-10-0x0000000000730000-0x0000000000830000-memory.dmp

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memory/4712-11-0x0000000000400000-0x000000000046E000-memory.dmp

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memory/4712-18-0x0000000000400000-0x000000000046E000-memory.dmp

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memory/4792-12-0x0000000000CD0000-0x0000000000CE5000-memory.dmp

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memory/4792-15-0x0000000000CD0000-0x0000000000CE5000-memory.dmp

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memory/4792-16-0x0000000000CD0000-0x0000000000CE5000-memory.dmp

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memory/4792-17-0x0000000000CD0000-0x0000000000CE5000-memory.dmp

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memory/4792-19-0x0000000000CD0000-0x0000000000CE5000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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