tofsee | 50ba0727ff40b4e5d7e6199aff7bd359b5c85754b62ae2e8ffaacf5f74ea28f2

Analysis

max time kernel
149s
max time network
156s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
15-10-2024 11:56

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

47ab1157f295d159245789ec8e945d02_JaffaCakes118.exe
Size

11.2MB
MD5

47ab1157f295d159245789ec8e945d02
SHA1

5dd4dca6de70ba725c6628d84894b86419e3495b
SHA256

50ba0727ff40b4e5d7e6199aff7bd359b5c85754b62ae2e8ffaacf5f74ea28f2
SHA512

e402015c0bba748df4c7d6c40df080a1be30e670185fff4da2e73157b070d37a5bb9beed47172a5caefe44a2edffbc039e2146aa976562058e962e34833b6a2f
SSDEEP

24576:7erU5sWbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbn:7sW

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

Windows security bypass 2 TTPs 1 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\SysWOW64\kriusewx = "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

Processes:

netsh.exe

pid	Process
2880	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\kriusewx\ImagePath = "C:\\Windows\\SysWOW64\\kriusewx\\obbzyzmm.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid	Process
2256	svchost.exe

Executes dropped EXE 1 IoCs

Processes:

obbzyzmm.exe

pid	Process
2716	obbzyzmm.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

obbzyzmm.exe

description	pid	Process	procid_target
PID 2716 set thread context of 2256	2716	obbzyzmm.exe	42

Launches sc.exe 3 IoCs

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

Processes:

sc.exesc.exesc.exe

pid	Process
2868	sc.exe
2832	sc.exe
3044	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

Processes:

netsh.exe

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

Processes:

47ab1157f295d159245789ec8e945d02_JaffaCakes118.execmd.execmd.exesc.exesc.exesc.exenetsh.exeobbzyzmm.exesvchost.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	47ab1157f295d159245789ec8e945d02_JaffaCakes118.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	sc.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	obbzyzmm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

47ab1157f295d159245789ec8e945d02_JaffaCakes118.exeobbzyzmm.exe

description	pid	Process	procid_target
PID 2904 wrote to memory of 2856	2904	47ab1157f295d159245789ec8e945d02_JaffaCakes118.exe	29
PID 2904 wrote to memory of 2856	2904	47ab1157f295d159245789ec8e945d02_JaffaCakes118.exe	29
PID 2904 wrote to memory of 2856	2904	47ab1157f295d159245789ec8e945d02_JaffaCakes118.exe	29
PID 2904 wrote to memory of 2856	2904	47ab1157f295d159245789ec8e945d02_JaffaCakes118.exe	29
PID 2904 wrote to memory of 2988	2904	47ab1157f295d159245789ec8e945d02_JaffaCakes118.exe	31
PID 2904 wrote to memory of 2988	2904	47ab1157f295d159245789ec8e945d02_JaffaCakes118.exe	31
PID 2904 wrote to memory of 2988	2904	47ab1157f295d159245789ec8e945d02_JaffaCakes118.exe	31
PID 2904 wrote to memory of 2988	2904	47ab1157f295d159245789ec8e945d02_JaffaCakes118.exe	31
PID 2904 wrote to memory of 2868	2904	47ab1157f295d159245789ec8e945d02_JaffaCakes118.exe	33
PID 2904 wrote to memory of 2868	2904	47ab1157f295d159245789ec8e945d02_JaffaCakes118.exe	33
PID 2904 wrote to memory of 2868	2904	47ab1157f295d159245789ec8e945d02_JaffaCakes118.exe	33
PID 2904 wrote to memory of 2868	2904	47ab1157f295d159245789ec8e945d02_JaffaCakes118.exe	33
PID 2904 wrote to memory of 2832	2904	47ab1157f295d159245789ec8e945d02_JaffaCakes118.exe	35
PID 2904 wrote to memory of 2832	2904	47ab1157f295d159245789ec8e945d02_JaffaCakes118.exe	35
PID 2904 wrote to memory of 2832	2904	47ab1157f295d159245789ec8e945d02_JaffaCakes118.exe	35
PID 2904 wrote to memory of 2832	2904	47ab1157f295d159245789ec8e945d02_JaffaCakes118.exe	35
PID 2904 wrote to memory of 3044	2904	47ab1157f295d159245789ec8e945d02_JaffaCakes118.exe	37
PID 2904 wrote to memory of 3044	2904	47ab1157f295d159245789ec8e945d02_JaffaCakes118.exe	37
PID 2904 wrote to memory of 3044	2904	47ab1157f295d159245789ec8e945d02_JaffaCakes118.exe	37
PID 2904 wrote to memory of 3044	2904	47ab1157f295d159245789ec8e945d02_JaffaCakes118.exe	37
PID 2904 wrote to memory of 2880	2904	47ab1157f295d159245789ec8e945d02_JaffaCakes118.exe	39
PID 2904 wrote to memory of 2880	2904	47ab1157f295d159245789ec8e945d02_JaffaCakes118.exe	39
PID 2904 wrote to memory of 2880	2904	47ab1157f295d159245789ec8e945d02_JaffaCakes118.exe	39
PID 2904 wrote to memory of 2880	2904	47ab1157f295d159245789ec8e945d02_JaffaCakes118.exe	39
PID 2716 wrote to memory of 2256	2716	obbzyzmm.exe	42
PID 2716 wrote to memory of 2256	2716	obbzyzmm.exe	42
PID 2716 wrote to memory of 2256	2716	obbzyzmm.exe	42
PID 2716 wrote to memory of 2256	2716	obbzyzmm.exe	42
PID 2716 wrote to memory of 2256	2716	obbzyzmm.exe	42
PID 2716 wrote to memory of 2256	2716	obbzyzmm.exe	42

C:\Users\Admin\AppData\Local\Temp\47ab1157f295d159245789ec8e945d02_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\47ab1157f295d159245789ec8e945d02_JaffaCakes118.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2904
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\kriusewx\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2856
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\obbzyzmm.exe" C:\Windows\SysWOW64\kriusewx\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2988
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create kriusewx binPath= "C:\Windows\SysWOW64\kriusewx\obbzyzmm.exe /d\"C:\Users\Admin\AppData\Local\Temp\47ab1157f295d159245789ec8e945d02_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 kriusewx "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2832
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start kriusewx
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3044
- 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:2880

C:\Windows\SysWOW64\kriusewx\obbzyzmm.exe
C:\Windows\SysWOW64\kriusewx\obbzyzmm.exe /d"C:\Users\Admin\AppData\Local\Temp\47ab1157f295d159245789ec8e945d02_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2716
- 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:2256

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

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
13.0MB

MD5
68b8fcaa7963fa99628d7ed60fdb925a

SHA1
890df799a43d9cd43c1a25ed1e954c9511381fc3

SHA256
d130cc3f4f5e00763bf5d1a0ec6a8293e6632a66b455cc324f079db760c32c34

SHA512
606498e48a9e84ae5ec6f5dbd235e725bb4e0a2618990480cde17ac1d158b8f912b2f27a92d07d1ad12c583675fec1071dc3f5b3fccd31321de6f5a98c8626d7

Download Submit
memory/2256-10-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2256-13-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2256-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2256-16-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2256-17-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2716-14-0x0000000000400000-0x000000000046D000-memory.dmp

Filesize
436KB

Download
memory/2904-1-0x00000000002D0000-0x00000000003D0000-memory.dmp

Filesize
1024KB

Download
memory/2904-3-0x0000000000400000-0x000000000046D000-memory.dmp

Filesize
436KB

Download
memory/2904-2-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2904-6-0x0000000000400000-0x000000000046D000-memory.dmp

Filesize
436KB

Download
memory/2904-7-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download