tofsee | 656bb0ab3ae68b59f6bb6c4b6be13136ccc6d387ad20859fc64b898b69a75268

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
02/04/2024, 15:26

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General

Target
9032ce9539241674fcb12dfc6209f440_JaffaCakes118.exe
Size 11.0MB
Sample240402-svflxaeb5z
SHA256 656bb0ab3ae68b59f6bb6c4b6be13136ccc6d387ad20859fc64b898b69a75268
MD5 9032ce9539241674fcb12dfc6209f440
SHA1 f87028616cef888381a48fedb9024a878cae34d5
SHA512 2070006dba16c2fd7cfb02b1360eb2ef68c846e6e52f37648e60243867f6b1db2a8b6287f8930b3a2992868c354b4752b4ddd0b8a452b24879735a03d1210245
SSDEEP 6144:puZQ8YhtrDfG08esd3CE9ccB3+molfLyKJ:MZ6DfG080E93u59LzJ
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
4104	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\xlkcemvw\ImagePath = "C:\\Windows\\SysWOW64\\xlkcemvw\\ixkgsrkw.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	9032ce9539241674fcb12dfc6209f440_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
864	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1696	ixkgsrkw.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1696 set thread context of 864	1696	ixkgsrkw.exe	107

Launches sc.exe 3 IoCs

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

pid	Process
368	sc.exe
2440	sc.exe
564	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
2036	644	WerFault.exe	83
2496	1696	WerFault.exe	99

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 644 wrote to memory of 532	644	9032ce9539241674fcb12dfc6209f440_JaffaCakes118.exe	87
PID 644 wrote to memory of 532	644	9032ce9539241674fcb12dfc6209f440_JaffaCakes118.exe	87
PID 644 wrote to memory of 532	644	9032ce9539241674fcb12dfc6209f440_JaffaCakes118.exe	87
PID 644 wrote to memory of 4912	644	9032ce9539241674fcb12dfc6209f440_JaffaCakes118.exe	89
PID 644 wrote to memory of 4912	644	9032ce9539241674fcb12dfc6209f440_JaffaCakes118.exe	89
PID 644 wrote to memory of 4912	644	9032ce9539241674fcb12dfc6209f440_JaffaCakes118.exe	89
PID 644 wrote to memory of 368	644	9032ce9539241674fcb12dfc6209f440_JaffaCakes118.exe	91
PID 644 wrote to memory of 368	644	9032ce9539241674fcb12dfc6209f440_JaffaCakes118.exe	91
PID 644 wrote to memory of 368	644	9032ce9539241674fcb12dfc6209f440_JaffaCakes118.exe	91
PID 644 wrote to memory of 2440	644	9032ce9539241674fcb12dfc6209f440_JaffaCakes118.exe	95
PID 644 wrote to memory of 2440	644	9032ce9539241674fcb12dfc6209f440_JaffaCakes118.exe	95
PID 644 wrote to memory of 2440	644	9032ce9539241674fcb12dfc6209f440_JaffaCakes118.exe	95
PID 644 wrote to memory of 564	644	9032ce9539241674fcb12dfc6209f440_JaffaCakes118.exe	97
PID 644 wrote to memory of 564	644	9032ce9539241674fcb12dfc6209f440_JaffaCakes118.exe	97
PID 644 wrote to memory of 564	644	9032ce9539241674fcb12dfc6209f440_JaffaCakes118.exe	97
PID 644 wrote to memory of 4104	644	9032ce9539241674fcb12dfc6209f440_JaffaCakes118.exe	101
PID 644 wrote to memory of 4104	644	9032ce9539241674fcb12dfc6209f440_JaffaCakes118.exe	101
PID 644 wrote to memory of 4104	644	9032ce9539241674fcb12dfc6209f440_JaffaCakes118.exe	101
PID 1696 wrote to memory of 864	1696	ixkgsrkw.exe	107
PID 1696 wrote to memory of 864	1696	ixkgsrkw.exe	107
PID 1696 wrote to memory of 864	1696	ixkgsrkw.exe	107
PID 1696 wrote to memory of 864	1696	ixkgsrkw.exe	107
PID 1696 wrote to memory of 864	1696	ixkgsrkw.exe	107

C:\Users\Admin\AppData\Local\Temp\9032ce9539241674fcb12dfc6209f440_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\9032ce9539241674fcb12dfc6209f440_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:644
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\xlkcemvw\
  2⤵
  PID:532
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ixkgsrkw.exe" C:\Windows\SysWOW64\xlkcemvw\
  2⤵
  PID:4912
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create xlkcemvw binPath= "C:\Windows\SysWOW64\xlkcemvw\ixkgsrkw.exe /d\"C:\Users\Admin\AppData\Local\Temp\9032ce9539241674fcb12dfc6209f440_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:368
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description xlkcemvw "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:2440
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start xlkcemvw
  2⤵
  - Launches sc.exe
  PID:564
- 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:4104
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 644 -s 1168
  2⤵
  - Program crash
  PID:2036

C:\Windows\SysWOW64\xlkcemvw\ixkgsrkw.exe
C:\Windows\SysWOW64\xlkcemvw\ixkgsrkw.exe /d"C:\Users\Admin\AppData\Local\Temp\9032ce9539241674fcb12dfc6209f440_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1696
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:864
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1696 -s 508
  2⤵
  - Program crash
  PID:2496

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 644 -ip 644
1⤵
PID:4852

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 1696 -ip 1696
1⤵
PID:412

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

ixkgsrkw.exe

Path C:\Users\Admin\AppData\Local\Temp\ixkgsrkw.exe
Size 14.3MB
SHA256 8d2fd25fef6893aa643cc8c6c3e49b520331dfcac7bca9155627f3985522ebd8
MD5 22ac03b53ae28bb9fb78aa4d9b1dc0cd
SHA1 0b4b2c2dd2fcb55c58ad946f0b0df03f6a8d92b9
SHA512 9d6c5a340908b67deafb15fc2c2774c37c48ec6311967220b60478a829d94d5791c5254efcacea47a8e28dd24216114f508935cfd8ae1d643839498a209fbbb4
SSDEEP 6144:1uZQ8YhtrDfG08esd3CE9ccB3+molfLyKJ:QZ6DfG080E93u59LzJ
MD5 SHA1 SHA512 SSDEEP

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memory/644-1-0x00000000005B0000-0x00000000006B0000-memory.dmp

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memory/644-2-0x00000000001E0000-0x00000000001F3000-memory.dmp

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memory/644-4-0x0000000000400000-0x000000000044C000-memory.dmp

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memory/644-8-0x0000000000400000-0x000000000044C000-memory.dmp

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memory/644-9-0x00000000001E0000-0x00000000001F3000-memory.dmp

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memory/864-12-0x00000000005A0000-0x00000000005B5000-memory.dmp

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memory/864-15-0x00000000005A0000-0x00000000005B5000-memory.dmp

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memory/864-16-0x00000000005A0000-0x00000000005B5000-memory.dmp

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memory/864-18-0x00000000005A0000-0x00000000005B5000-memory.dmp

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memory/1696-11-0x0000000000400000-0x000000000044C000-memory.dmp

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memory/1696-10-0x00000000006D0000-0x00000000007D0000-memory.dmp

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memory/1696-17-0x0000000000400000-0x000000000044C000-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