tofsee | 40d7a1c66cbc76edf2b6e5ff906a83043ebe95314518815ea6fc3c6894a9214c

Analysis

max time kernel
148s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
04/04/2024, 16:53

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General

Target
bd981ae30157d03c4f1c4dabc6fd0103_JaffaCakes118.exe
Size 14.2MB
Sample240404-vefm3sch8y
SHA256 40d7a1c66cbc76edf2b6e5ff906a83043ebe95314518815ea6fc3c6894a9214c
MD5 bd981ae30157d03c4f1c4dabc6fd0103
SHA1 0f445dcea34f929b38a4fb979f07f9202105ad1b
SHA512 0b88f7044f3a8d0b87727dd337543b4ac81fd9ec0848fc34ab71ebf2cc09d8bd53ae1c820d507dadbf169b2c26609ff64e7019223aa4a8708b57f1f36d16026a
SSDEEP 196608:o3qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqf:o
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
2316	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\iaoqkodh\ImagePath = "C:\\Windows\\SysWOW64\\iaoqkodh\\yfrenabv.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-1-5-21-566096764-1992588923-1249862864-1000\Control Panel\International\Geo\Nation	bd981ae30157d03c4f1c4dabc6fd0103_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
4752	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2288	yfrenabv.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2288 set thread context of 4752	2288	yfrenabv.exe	106

Launches sc.exe 3 IoCs

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

pid	Process
1184	sc.exe
2680	sc.exe
4676	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
3992	372	WerFault.exe	84
4484	2288	WerFault.exe	100

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 372 wrote to memory of 2408	372	bd981ae30157d03c4f1c4dabc6fd0103_JaffaCakes118.exe	88
PID 372 wrote to memory of 2408	372	bd981ae30157d03c4f1c4dabc6fd0103_JaffaCakes118.exe	88
PID 372 wrote to memory of 2408	372	bd981ae30157d03c4f1c4dabc6fd0103_JaffaCakes118.exe	88
PID 372 wrote to memory of 1012	372	bd981ae30157d03c4f1c4dabc6fd0103_JaffaCakes118.exe	90
PID 372 wrote to memory of 1012	372	bd981ae30157d03c4f1c4dabc6fd0103_JaffaCakes118.exe	90
PID 372 wrote to memory of 1012	372	bd981ae30157d03c4f1c4dabc6fd0103_JaffaCakes118.exe	90
PID 372 wrote to memory of 1184	372	bd981ae30157d03c4f1c4dabc6fd0103_JaffaCakes118.exe	92
PID 372 wrote to memory of 1184	372	bd981ae30157d03c4f1c4dabc6fd0103_JaffaCakes118.exe	92
PID 372 wrote to memory of 1184	372	bd981ae30157d03c4f1c4dabc6fd0103_JaffaCakes118.exe	92
PID 372 wrote to memory of 2680	372	bd981ae30157d03c4f1c4dabc6fd0103_JaffaCakes118.exe	94
PID 372 wrote to memory of 2680	372	bd981ae30157d03c4f1c4dabc6fd0103_JaffaCakes118.exe	94
PID 372 wrote to memory of 2680	372	bd981ae30157d03c4f1c4dabc6fd0103_JaffaCakes118.exe	94
PID 372 wrote to memory of 4676	372	bd981ae30157d03c4f1c4dabc6fd0103_JaffaCakes118.exe	98
PID 372 wrote to memory of 4676	372	bd981ae30157d03c4f1c4dabc6fd0103_JaffaCakes118.exe	98
PID 372 wrote to memory of 4676	372	bd981ae30157d03c4f1c4dabc6fd0103_JaffaCakes118.exe	98
PID 372 wrote to memory of 2316	372	bd981ae30157d03c4f1c4dabc6fd0103_JaffaCakes118.exe	101
PID 372 wrote to memory of 2316	372	bd981ae30157d03c4f1c4dabc6fd0103_JaffaCakes118.exe	101
PID 372 wrote to memory of 2316	372	bd981ae30157d03c4f1c4dabc6fd0103_JaffaCakes118.exe	101
PID 2288 wrote to memory of 4752	2288	yfrenabv.exe	106
PID 2288 wrote to memory of 4752	2288	yfrenabv.exe	106
PID 2288 wrote to memory of 4752	2288	yfrenabv.exe	106
PID 2288 wrote to memory of 4752	2288	yfrenabv.exe	106
PID 2288 wrote to memory of 4752	2288	yfrenabv.exe	106

C:\Users\Admin\AppData\Local\Temp\bd981ae30157d03c4f1c4dabc6fd0103_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\bd981ae30157d03c4f1c4dabc6fd0103_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:372
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\iaoqkodh\
  2⤵
  PID:2408
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\yfrenabv.exe" C:\Windows\SysWOW64\iaoqkodh\
  2⤵
  PID:1012
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create iaoqkodh binPath= "C:\Windows\SysWOW64\iaoqkodh\yfrenabv.exe /d\"C:\Users\Admin\AppData\Local\Temp\bd981ae30157d03c4f1c4dabc6fd0103_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:1184
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description iaoqkodh "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:2680
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start iaoqkodh
  2⤵
  - Launches sc.exe
  PID:4676
- 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:2316
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 372 -s 1232
  2⤵
  - Program crash
  PID:3992

C:\Windows\SysWOW64\iaoqkodh\yfrenabv.exe
C:\Windows\SysWOW64\iaoqkodh\yfrenabv.exe /d"C:\Users\Admin\AppData\Local\Temp\bd981ae30157d03c4f1c4dabc6fd0103_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2288
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:4752
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2288 -s 520
  2⤵
  - Program crash
  PID:4484

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 372 -ip 372
1⤵
PID:440

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 2288 -ip 2288
1⤵
PID:1684

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

yfrenabv.exe

Path C:\Users\Admin\AppData\Local\Temp\yfrenabv.exe
Size 10.7MB
SHA256 0a2c895ee3b079414aac41d1672c9ad2925bf1beaded51eba9843d397b93fe06
MD5 c74e5e5fb2c19edda1ada11d9ae3b61b
SHA1 6b09ecf59e62e1f7e0edbbc961ac47baeb76a15f
SHA512 625737210424efb5a628824eb2f94ff01a76e3279bb1ae7881c58e7a3b8ab29f346c5f8172f7490cc76a76506303ace6f508f463e80d9c456ed973d615dfa330
SSDEEP 196608:j3qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqS:j
MD5 SHA1 SHA512 SSDEEP

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memory/372-1-0x0000000000AC0000-0x0000000000BC0000-memory.dmp

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memory/372-2-0x00000000001C0000-0x00000000001D3000-memory.dmp

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memory/372-4-0x0000000000400000-0x0000000000871000-memory.dmp

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memory/372-8-0x0000000000400000-0x0000000000871000-memory.dmp

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memory/372-9-0x00000000001C0000-0x00000000001D3000-memory.dmp

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memory/2288-10-0x00000000009F0000-0x0000000000AF0000-memory.dmp

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memory/2288-11-0x0000000000400000-0x0000000000871000-memory.dmp

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memory/2288-16-0x0000000000400000-0x0000000000871000-memory.dmp

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memory/4752-12-0x0000000000F90000-0x0000000000FA5000-memory.dmp

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memory/4752-15-0x0000000000F90000-0x0000000000FA5000-memory.dmp

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memory/4752-17-0x0000000000F90000-0x0000000000FA5000-memory.dmp

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memory/4752-18-0x0000000000F90000-0x0000000000FA5000-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