tofsee | a3adb0166f99e3d6632f0c915e9bf9361223b42639703f13873d9a1934e6797c

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
29/12/2024, 23:17

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General

Target
JaffaCakes118_a3adb0166f99e3d6632f0c915e9bf9361223b42639703f13873d9a1934e6797c.exe
Size 237KB
Sample241229-294fysznct
SHA256 a3adb0166f99e3d6632f0c915e9bf9361223b42639703f13873d9a1934e6797c
MD5 1191183d3c4cca2e9799d6a6d1c67b18
SHA1 6924ade5ffeef5b226223b83820e0e7c962a6102
SHA512 7dcf7b30bb597917996ae1b22125df13127ee0a67242440c4b1ca3d7eb3f14f7435d180b1141d7c0cdee6e50891398ccac2a05c7953b372173b20bd66b282353
SSDEEP 6144:64Mm3W6nJ+lQ/7O3gLtA3wdZwwisdBLyJFJN5P0:6dbYJ+lQMgLtAgtiMxyJFJNN0
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation 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
Tofsee family
tofsee
Creates new service(s) 2 TTPs
persistence execution

Windows Service
T1543.003

Service Execution
T1569.002

Modifies Windows Firewall 2 TTPs 1 IoCs

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
1992	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\lykjrqia\ImagePath = "C:\\Windows\\SysWOW64\\lykjrqia\\mtfsbopj.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-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	JaffaCakes118_a3adb0166f99e3d6632f0c915e9bf9361223b42639703f13873d9a1934e6797c.exe

Deletes itself 1 IoCs

pid	Process
3996	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1136	mtfsbopj.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1136 set thread context of 3996	1136	mtfsbopj.exe	99

Launches sc.exe 3 IoCs

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

pid	Process
4700	sc.exe
2920	sc.exe
392	sc.exe

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

System Information Discovery
T1082

Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

persistence privilege_escalation

Netsh Helper DLL

T1546.007

description	ioc	Process
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

Program crash 4 IoCs

pid	pid_target	Process	procid_target
1924	3896	WerFault.exe	81
2288	3896	WerFault.exe	81
3912	1136	WerFault.exe	92
756	1136	WerFault.exe	92

System Location Discovery: System Language Discovery 1 TTPs 9 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mtfsbopj.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_a3adb0166f99e3d6632f0c915e9bf9361223b42639703f13873d9a1934e6797c.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3896 wrote to memory of 4792	3896	JaffaCakes118_a3adb0166f99e3d6632f0c915e9bf9361223b42639703f13873d9a1934e6797c.exe	82
PID 3896 wrote to memory of 4792	3896	JaffaCakes118_a3adb0166f99e3d6632f0c915e9bf9361223b42639703f13873d9a1934e6797c.exe	82
PID 3896 wrote to memory of 4792	3896	JaffaCakes118_a3adb0166f99e3d6632f0c915e9bf9361223b42639703f13873d9a1934e6797c.exe	82
PID 3896 wrote to memory of 1396	3896	JaffaCakes118_a3adb0166f99e3d6632f0c915e9bf9361223b42639703f13873d9a1934e6797c.exe	84
PID 3896 wrote to memory of 1396	3896	JaffaCakes118_a3adb0166f99e3d6632f0c915e9bf9361223b42639703f13873d9a1934e6797c.exe	84
PID 3896 wrote to memory of 1396	3896	JaffaCakes118_a3adb0166f99e3d6632f0c915e9bf9361223b42639703f13873d9a1934e6797c.exe	84
PID 3896 wrote to memory of 2920	3896	JaffaCakes118_a3adb0166f99e3d6632f0c915e9bf9361223b42639703f13873d9a1934e6797c.exe	86
PID 3896 wrote to memory of 2920	3896	JaffaCakes118_a3adb0166f99e3d6632f0c915e9bf9361223b42639703f13873d9a1934e6797c.exe	86
PID 3896 wrote to memory of 2920	3896	JaffaCakes118_a3adb0166f99e3d6632f0c915e9bf9361223b42639703f13873d9a1934e6797c.exe	86
PID 3896 wrote to memory of 392	3896	JaffaCakes118_a3adb0166f99e3d6632f0c915e9bf9361223b42639703f13873d9a1934e6797c.exe	88
PID 3896 wrote to memory of 392	3896	JaffaCakes118_a3adb0166f99e3d6632f0c915e9bf9361223b42639703f13873d9a1934e6797c.exe	88
PID 3896 wrote to memory of 392	3896	JaffaCakes118_a3adb0166f99e3d6632f0c915e9bf9361223b42639703f13873d9a1934e6797c.exe	88
PID 3896 wrote to memory of 4700	3896	JaffaCakes118_a3adb0166f99e3d6632f0c915e9bf9361223b42639703f13873d9a1934e6797c.exe	90
PID 3896 wrote to memory of 4700	3896	JaffaCakes118_a3adb0166f99e3d6632f0c915e9bf9361223b42639703f13873d9a1934e6797c.exe	90
PID 3896 wrote to memory of 4700	3896	JaffaCakes118_a3adb0166f99e3d6632f0c915e9bf9361223b42639703f13873d9a1934e6797c.exe	90
PID 3896 wrote to memory of 1992	3896	JaffaCakes118_a3adb0166f99e3d6632f0c915e9bf9361223b42639703f13873d9a1934e6797c.exe	93
PID 3896 wrote to memory of 1992	3896	JaffaCakes118_a3adb0166f99e3d6632f0c915e9bf9361223b42639703f13873d9a1934e6797c.exe	93
PID 3896 wrote to memory of 1992	3896	JaffaCakes118_a3adb0166f99e3d6632f0c915e9bf9361223b42639703f13873d9a1934e6797c.exe	93
PID 1136 wrote to memory of 3996	1136	mtfsbopj.exe	99
PID 1136 wrote to memory of 3996	1136	mtfsbopj.exe	99
PID 1136 wrote to memory of 3996	1136	mtfsbopj.exe	99
PID 1136 wrote to memory of 3996	1136	mtfsbopj.exe	99
PID 1136 wrote to memory of 3996	1136	mtfsbopj.exe	99

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_a3adb0166f99e3d6632f0c915e9bf9361223b42639703f13873d9a1934e6797c.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_a3adb0166f99e3d6632f0c915e9bf9361223b42639703f13873d9a1934e6797c.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3896
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\lykjrqia\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4792
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\mtfsbopj.exe" C:\Windows\SysWOW64\lykjrqia\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1396
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create lykjrqia binPath= "C:\Windows\SysWOW64\lykjrqia\mtfsbopj.exe /d\"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_a3adb0166f99e3d6632f0c915e9bf9361223b42639703f13873d9a1934e6797c.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2920
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description lykjrqia "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:392
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start lykjrqia
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4700
- 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
  - Event Triggered Execution: Netsh Helper DLL
  - System Location Discovery: System Language Discovery
  PID:1992
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3896 -s 1032
  2⤵
  - Program crash
  PID:1924
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3896 -s 1160
  2⤵
  - Program crash
  PID:2288

C:\Windows\SysWOW64\lykjrqia\mtfsbopj.exe
C:\Windows\SysWOW64\lykjrqia\mtfsbopj.exe /d"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_a3adb0166f99e3d6632f0c915e9bf9361223b42639703f13873d9a1934e6797c.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1136
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:3996
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1136 -s 524
  2⤵
  - Program crash
  PID:3912
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1136 -s 564
  2⤵
  - Program crash
  PID:756

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3896 -ip 3896
1⤵
PID:1636

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 540 -p 3896 -ip 3896
1⤵
PID:4484

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 1136 -ip 1136
1⤵
PID:3476

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 1136 -ip 1136
1⤵
PID:3084

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

T1569

Service Execution

T1569.002

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

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

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

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

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

mtfsbopj.exe

Path C:\Users\Admin\AppData\Local\Temp\mtfsbopj.exe
Size 11.0MB
SHA256 315b588d9ea9a25ec42539be4dfaa35e1e3962ca72e489949c31d5d18707b5d4
MD5 695db9f7141922a0f2cd508785a9e9df
SHA1 2bdc07ee9f75f9bce0d32a0cbfe00cfef8150648
SHA512 619d31ba72ef0cb09de22521d978e29d952a8c5739c972af01523f9fce39a9d703667e3041ba869fb77be838562adbdd9eccee5875fef02ec46f6dd8cef00a2f
SSDEEP 12288:GdbYJ+lQMgLtAgtiMxyJFJNN0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaan:CvQMwRtiMO
MD5 SHA1 SHA512 SSDEEP

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memory/1136-11-0x0000000000400000-0x000000000086B000-memory.dmp

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memory/1136-8-0x0000000000400000-0x000000000086B000-memory.dmp

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memory/1136-12-0x0000000000400000-0x000000000086B000-memory.dmp

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memory/3896-3-0x0000000000400000-0x0000000000415000-memory.dmp

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memory/3896-1-0x0000000000B40000-0x0000000000C40000-memory.dmp

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memory/3896-2-0x00000000009B0000-0x00000000009C3000-memory.dmp

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memory/3896-13-0x0000000000400000-0x000000000086B000-memory.dmp

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memory/3896-15-0x0000000000400000-0x0000000000415000-memory.dmp

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memory/3896-14-0x00000000009B0000-0x00000000009C3000-memory.dmp

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memory/3996-9-0x00000000012C0000-0x00000000012D5000-memory.dmp

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memory/3996-17-0x00000000012C0000-0x00000000012D5000-memory.dmp

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memory/3996-18-0x00000000012C0000-0x00000000012D5000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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