tofsee | e827537be7f9f2851398a94c202be0d1360ac147833fea726f66a7361517fe24

Analysis

max time kernel
144s
max time network
125s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
23-10-2024 21:02

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General

Target

70cd7dac03e7262761d58616232b837a_JaffaCakes118.exe
Size

11.1MB
MD5

70cd7dac03e7262761d58616232b837a
SHA1

a93e9fea183cfef7f282f6c9744512433c58c228
SHA256

e827537be7f9f2851398a94c202be0d1360ac147833fea726f66a7361517fe24
SHA512

984e84d757299678bfa013c96526f0439d01f5506e5c63f5566f17ff54cc0d123df249ada2c95bb3ac2204a4991716fd5f614d27dc1ff12b946433080fb340ec
SSDEEP

3072:7rLSAaIXFM9X/WWIyOEfEDQMZWecFKmZ:PNWktyH9V

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

43.231.4.7

lazystax.ru

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

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\SysWOW64\fznihkfs = "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
2076	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\fznihkfs\ImagePath = "C:\\Windows\\SysWOW64\\fznihkfs\\uszvudbs.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2924	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2776	uszvudbs.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2776 set thread context of 2924	2776	uszvudbs.exe	41

Launches sc.exe 3 IoCs

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

pid	Process
3064	sc.exe
2220	sc.exe
3008	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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	70cd7dac03e7262761d58616232b837a_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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	uszvudbs.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2340 wrote to memory of 1312	2340	70cd7dac03e7262761d58616232b837a_JaffaCakes118.exe	30
PID 2340 wrote to memory of 1312	2340	70cd7dac03e7262761d58616232b837a_JaffaCakes118.exe	30
PID 2340 wrote to memory of 1312	2340	70cd7dac03e7262761d58616232b837a_JaffaCakes118.exe	30
PID 2340 wrote to memory of 1312	2340	70cd7dac03e7262761d58616232b837a_JaffaCakes118.exe	30
PID 2340 wrote to memory of 2540	2340	70cd7dac03e7262761d58616232b837a_JaffaCakes118.exe	32
PID 2340 wrote to memory of 2540	2340	70cd7dac03e7262761d58616232b837a_JaffaCakes118.exe	32
PID 2340 wrote to memory of 2540	2340	70cd7dac03e7262761d58616232b837a_JaffaCakes118.exe	32
PID 2340 wrote to memory of 2540	2340	70cd7dac03e7262761d58616232b837a_JaffaCakes118.exe	32
PID 2340 wrote to memory of 2220	2340	70cd7dac03e7262761d58616232b837a_JaffaCakes118.exe	34
PID 2340 wrote to memory of 2220	2340	70cd7dac03e7262761d58616232b837a_JaffaCakes118.exe	34
PID 2340 wrote to memory of 2220	2340	70cd7dac03e7262761d58616232b837a_JaffaCakes118.exe	34
PID 2340 wrote to memory of 2220	2340	70cd7dac03e7262761d58616232b837a_JaffaCakes118.exe	34
PID 2340 wrote to memory of 3008	2340	70cd7dac03e7262761d58616232b837a_JaffaCakes118.exe	36
PID 2340 wrote to memory of 3008	2340	70cd7dac03e7262761d58616232b837a_JaffaCakes118.exe	36
PID 2340 wrote to memory of 3008	2340	70cd7dac03e7262761d58616232b837a_JaffaCakes118.exe	36
PID 2340 wrote to memory of 3008	2340	70cd7dac03e7262761d58616232b837a_JaffaCakes118.exe	36
PID 2340 wrote to memory of 3064	2340	70cd7dac03e7262761d58616232b837a_JaffaCakes118.exe	38
PID 2340 wrote to memory of 3064	2340	70cd7dac03e7262761d58616232b837a_JaffaCakes118.exe	38
PID 2340 wrote to memory of 3064	2340	70cd7dac03e7262761d58616232b837a_JaffaCakes118.exe	38
PID 2340 wrote to memory of 3064	2340	70cd7dac03e7262761d58616232b837a_JaffaCakes118.exe	38
PID 2776 wrote to memory of 2924	2776	uszvudbs.exe	41
PID 2776 wrote to memory of 2924	2776	uszvudbs.exe	41
PID 2776 wrote to memory of 2924	2776	uszvudbs.exe	41
PID 2776 wrote to memory of 2924	2776	uszvudbs.exe	41
PID 2776 wrote to memory of 2924	2776	uszvudbs.exe	41
PID 2776 wrote to memory of 2924	2776	uszvudbs.exe	41
PID 2340 wrote to memory of 2076	2340	70cd7dac03e7262761d58616232b837a_JaffaCakes118.exe	42
PID 2340 wrote to memory of 2076	2340	70cd7dac03e7262761d58616232b837a_JaffaCakes118.exe	42
PID 2340 wrote to memory of 2076	2340	70cd7dac03e7262761d58616232b837a_JaffaCakes118.exe	42
PID 2340 wrote to memory of 2076	2340	70cd7dac03e7262761d58616232b837a_JaffaCakes118.exe	42

C:\Users\Admin\AppData\Local\Temp\70cd7dac03e7262761d58616232b837a_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\70cd7dac03e7262761d58616232b837a_JaffaCakes118.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2340
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\fznihkfs\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1312
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\uszvudbs.exe" C:\Windows\SysWOW64\fznihkfs\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2540
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create fznihkfs binPath= "C:\Windows\SysWOW64\fznihkfs\uszvudbs.exe /d\"C:\Users\Admin\AppData\Local\Temp\70cd7dac03e7262761d58616232b837a_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2220
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description fznihkfs "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3008
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start fznihkfs
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3064
- 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:2076

C:\Windows\SysWOW64\fznihkfs\uszvudbs.exe
C:\Windows\SysWOW64\fznihkfs\uszvudbs.exe /d"C:\Users\Admin\AppData\Local\Temp\70cd7dac03e7262761d58616232b837a_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2776
- 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:2924

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\uszvudbs.exe

Filesize
10.5MB

MD5
c3c2dfc1befd31b60b90b88de3831371

SHA1
03388a3e7aeaf02add0891c8cf3f18c59da88f47

SHA256
897a4ca11899597b475be28986f3185d7c3ed9f8036497af2a17490ee1b52503

SHA512
cfb5147dca773196b191271165dfca379f1a5022e56aeb4f9a23e05cd040bf57aafd718a5397e18f5203ae6b3e1187eb77200c688850fa83657f5698666a2512

Download Submit
memory/2340-14-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/2340-1-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/2340-2-0x0000000000220000-0x0000000000221000-memory.dmp

Filesize
4KB

Download
memory/2340-0-0x0000000000270000-0x0000000000271000-memory.dmp

Filesize
4KB

Download
memory/2340-15-0x00000000050E0000-0x00000000050F1000-memory.dmp

Filesize
68KB

Download
memory/2776-11-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/2776-12-0x00000000050E0000-0x00000000050F1000-memory.dmp

Filesize
68KB

Download
memory/2924-7-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2924-10-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2924-9-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2924-16-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2924-17-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads