tofsee | 4866418a9a7b1240087f97ee281d4f7dc408f611864e05cf95a6fc03ab3ad91d

Analysis

max time kernel
147s
max time network
147s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
07-12-2024 00:10

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General

Target

cfb9acf2a95d4de2a30f5fddf46b0bbc_JaffaCakes118.exe
Size

240KB
MD5

cfb9acf2a95d4de2a30f5fddf46b0bbc
SHA1

7bf7ea5d368628e6dbc9f3ac625ae7495fb9f1cc
SHA256

4866418a9a7b1240087f97ee281d4f7dc408f611864e05cf95a6fc03ab3ad91d
SHA512

fbf3d40e0d8ae9491e54a6ad973c895f8f5bff9b1b7f07d70460dc5f1df522bfb1fcf8bbca97cdfb68d94fbddb306347f42889949fe2fc28b4040b2f401dbc0f
SSDEEP

3072:IhTQIPXZIPfCCP7nHY90irjQ5h/prcPI1Ze8jOVqIe5RHZFS4sz:IhMIPJIDL490irk/1cPI1lOJe5R+

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

Windows security bypass 2 TTPs 1 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\SysWOW64\akyuiewn = "0"	svchost.exe

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
2884	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\akyuiewn\ImagePath = "C:\\Windows\\SysWOW64\\akyuiewn\\bigrwrft.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2692	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2532	bigrwrft.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2532 set thread context of 2692	2532	bigrwrft.exe	42

Launches sc.exe 3 IoCs

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

pid	Process
2868	sc.exe
2932	sc.exe
2852	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 opened	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh	netsh.exe
Key queried	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh	netsh.exe

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	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	bigrwrft.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cfb9acf2a95d4de2a30f5fddf46b0bbc_JaffaCakes118.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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2420 wrote to memory of 580	2420	cfb9acf2a95d4de2a30f5fddf46b0bbc_JaffaCakes118.exe	29
PID 2420 wrote to memory of 580	2420	cfb9acf2a95d4de2a30f5fddf46b0bbc_JaffaCakes118.exe	29
PID 2420 wrote to memory of 580	2420	cfb9acf2a95d4de2a30f5fddf46b0bbc_JaffaCakes118.exe	29
PID 2420 wrote to memory of 580	2420	cfb9acf2a95d4de2a30f5fddf46b0bbc_JaffaCakes118.exe	29
PID 2420 wrote to memory of 2288	2420	cfb9acf2a95d4de2a30f5fddf46b0bbc_JaffaCakes118.exe	31
PID 2420 wrote to memory of 2288	2420	cfb9acf2a95d4de2a30f5fddf46b0bbc_JaffaCakes118.exe	31
PID 2420 wrote to memory of 2288	2420	cfb9acf2a95d4de2a30f5fddf46b0bbc_JaffaCakes118.exe	31
PID 2420 wrote to memory of 2288	2420	cfb9acf2a95d4de2a30f5fddf46b0bbc_JaffaCakes118.exe	31
PID 2420 wrote to memory of 2868	2420	cfb9acf2a95d4de2a30f5fddf46b0bbc_JaffaCakes118.exe	33
PID 2420 wrote to memory of 2868	2420	cfb9acf2a95d4de2a30f5fddf46b0bbc_JaffaCakes118.exe	33
PID 2420 wrote to memory of 2868	2420	cfb9acf2a95d4de2a30f5fddf46b0bbc_JaffaCakes118.exe	33
PID 2420 wrote to memory of 2868	2420	cfb9acf2a95d4de2a30f5fddf46b0bbc_JaffaCakes118.exe	33
PID 2420 wrote to memory of 2932	2420	cfb9acf2a95d4de2a30f5fddf46b0bbc_JaffaCakes118.exe	35
PID 2420 wrote to memory of 2932	2420	cfb9acf2a95d4de2a30f5fddf46b0bbc_JaffaCakes118.exe	35
PID 2420 wrote to memory of 2932	2420	cfb9acf2a95d4de2a30f5fddf46b0bbc_JaffaCakes118.exe	35
PID 2420 wrote to memory of 2932	2420	cfb9acf2a95d4de2a30f5fddf46b0bbc_JaffaCakes118.exe	35
PID 2420 wrote to memory of 2852	2420	cfb9acf2a95d4de2a30f5fddf46b0bbc_JaffaCakes118.exe	37
PID 2420 wrote to memory of 2852	2420	cfb9acf2a95d4de2a30f5fddf46b0bbc_JaffaCakes118.exe	37
PID 2420 wrote to memory of 2852	2420	cfb9acf2a95d4de2a30f5fddf46b0bbc_JaffaCakes118.exe	37
PID 2420 wrote to memory of 2852	2420	cfb9acf2a95d4de2a30f5fddf46b0bbc_JaffaCakes118.exe	37
PID 2420 wrote to memory of 2884	2420	cfb9acf2a95d4de2a30f5fddf46b0bbc_JaffaCakes118.exe	40
PID 2420 wrote to memory of 2884	2420	cfb9acf2a95d4de2a30f5fddf46b0bbc_JaffaCakes118.exe	40
PID 2420 wrote to memory of 2884	2420	cfb9acf2a95d4de2a30f5fddf46b0bbc_JaffaCakes118.exe	40
PID 2420 wrote to memory of 2884	2420	cfb9acf2a95d4de2a30f5fddf46b0bbc_JaffaCakes118.exe	40
PID 2532 wrote to memory of 2692	2532	bigrwrft.exe	42
PID 2532 wrote to memory of 2692	2532	bigrwrft.exe	42
PID 2532 wrote to memory of 2692	2532	bigrwrft.exe	42
PID 2532 wrote to memory of 2692	2532	bigrwrft.exe	42
PID 2532 wrote to memory of 2692	2532	bigrwrft.exe	42
PID 2532 wrote to memory of 2692	2532	bigrwrft.exe	42

C:\Users\Admin\AppData\Local\Temp\cfb9acf2a95d4de2a30f5fddf46b0bbc_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\cfb9acf2a95d4de2a30f5fddf46b0bbc_JaffaCakes118.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2420
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\akyuiewn\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:580
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\bigrwrft.exe" C:\Windows\SysWOW64\akyuiewn\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2288
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create akyuiewn binPath= "C:\Windows\SysWOW64\akyuiewn\bigrwrft.exe /d\"C:\Users\Admin\AppData\Local\Temp\cfb9acf2a95d4de2a30f5fddf46b0bbc_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2868
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description akyuiewn "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2932
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start akyuiewn
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2852
- 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:2884

C:\Windows\SysWOW64\akyuiewn\bigrwrft.exe
C:\Windows\SysWOW64\akyuiewn\bigrwrft.exe /d"C:\Users\Admin\AppData\Local\Temp\cfb9acf2a95d4de2a30f5fddf46b0bbc_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2532
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Windows security bypass
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2692

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

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Credential Access

Discovery

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

C:\Users\Admin\AppData\Local\Temp\bigrwrft.exe

Filesize
14.8MB

MD5
e988ca555acdd56222984d99d3135432

SHA1
5634a876eef91da47f6c53ff2c01d7a8a7118a2d

SHA256
c933c677c1d1693d94166ccd3393a670204181fbadc8a8ebbe76ba0e1e16e6af

SHA512
cd28430cf7e2d64327678105daf04f2aee98ceb750ade2f8ece0607ca078247703d016f335403d0f71644482e5cb49a149561a490e32c7ce0b4430d388cdc89a

Download Submit
memory/2420-8-0x0000000000400000-0x0000000000448000-memory.dmp

Filesize
288KB

Download
memory/2420-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2420-1-0x0000000000270000-0x0000000000370000-memory.dmp

Filesize
1024KB

Download
memory/2420-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2420-9-0x00000000001B0000-0x00000000001C3000-memory.dmp

Filesize
76KB

Download
memory/2420-2-0x00000000001B0000-0x00000000001C3000-memory.dmp

Filesize
76KB

Download
memory/2532-17-0x0000000000400000-0x0000000000448000-memory.dmp

Filesize
288KB

Download
memory/2692-14-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2692-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2692-11-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2692-16-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2692-18-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads