tofsee | f3b00c122ad21183addcef9d57004601806e04ddeb3a3b3165573380c52f6697

General

Target

697e454ef3dd9e8d48fb61cecd2cf76b_JaffaCakes118.exe
Size

13.4MB
MD5

697e454ef3dd9e8d48fb61cecd2cf76b
SHA1

1b0e44aa941afff708b3704d618cc3e69dc1ed83
SHA256

f3b00c122ad21183addcef9d57004601806e04ddeb3a3b3165573380c52f6697
SHA512

6488dd2c8270940ead98a083577390a5368a5402a759b1c23cb4bb9268e978d7456f44f834840dd63cb96515b488d782643619148e47bce682399fe390ea05ca
SSDEEP

196608:cXPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPv:c

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

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\cdzbxkfb = "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

2328 netsh.exe

pid	process
2328	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\cdzbxkfb\ImagePath = "C:\\Windows\\SysWOW64\\cdzbxkfb\\nzuryxxl.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

1872 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

nzuryxxl.exe

pid process

2772 nzuryxxl.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

nzuryxxl.exe

description pid process target process

PID 2772 set thread context of 1872 2772 nzuryxxl.exe svchost.exe
Launches sc.exe 3 IoCs
Sc.exe is a Windows utlilty to control services on the system.

Processes:

sc.exesc.exesc.exe

pid process

2896 sc.exe
2884 sc.exe
2740 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
1872	svchost.exe

pid	process
2772	nzuryxxl.exe

description	pid	process	target process
PID 2772 set thread context of 1872	2772	nzuryxxl.exe	svchost.exe

pid	process
2896	sc.exe
2884	sc.exe
2740	sc.exe

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 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

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:

697e454ef3dd9e8d48fb61cecd2cf76b_JaffaCakes118.execmd.exesc.execmd.exesc.exesc.exenetsh.exenzuryxxl.exesvchost.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	697e454ef3dd9e8d48fb61cecd2cf76b_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	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	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	nzuryxxl.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

697e454ef3dd9e8d48fb61cecd2cf76b_JaffaCakes118.exenzuryxxl.exe

description	pid	process	target process
PID 2700 wrote to memory of 2756	2700	697e454ef3dd9e8d48fb61cecd2cf76b_JaffaCakes118.exe	cmd.exe
PID 2700 wrote to memory of 2756	2700	697e454ef3dd9e8d48fb61cecd2cf76b_JaffaCakes118.exe	cmd.exe
PID 2700 wrote to memory of 2756	2700	697e454ef3dd9e8d48fb61cecd2cf76b_JaffaCakes118.exe	cmd.exe
PID 2700 wrote to memory of 2756	2700	697e454ef3dd9e8d48fb61cecd2cf76b_JaffaCakes118.exe	cmd.exe
PID 2700 wrote to memory of 2888	2700	697e454ef3dd9e8d48fb61cecd2cf76b_JaffaCakes118.exe	cmd.exe
PID 2700 wrote to memory of 2888	2700	697e454ef3dd9e8d48fb61cecd2cf76b_JaffaCakes118.exe	cmd.exe
PID 2700 wrote to memory of 2888	2700	697e454ef3dd9e8d48fb61cecd2cf76b_JaffaCakes118.exe	cmd.exe
PID 2700 wrote to memory of 2888	2700	697e454ef3dd9e8d48fb61cecd2cf76b_JaffaCakes118.exe	cmd.exe
PID 2700 wrote to memory of 2740	2700	697e454ef3dd9e8d48fb61cecd2cf76b_JaffaCakes118.exe	sc.exe
PID 2700 wrote to memory of 2740	2700	697e454ef3dd9e8d48fb61cecd2cf76b_JaffaCakes118.exe	sc.exe
PID 2700 wrote to memory of 2740	2700	697e454ef3dd9e8d48fb61cecd2cf76b_JaffaCakes118.exe	sc.exe
PID 2700 wrote to memory of 2740	2700	697e454ef3dd9e8d48fb61cecd2cf76b_JaffaCakes118.exe	sc.exe
PID 2700 wrote to memory of 2896	2700	697e454ef3dd9e8d48fb61cecd2cf76b_JaffaCakes118.exe	sc.exe
PID 2700 wrote to memory of 2896	2700	697e454ef3dd9e8d48fb61cecd2cf76b_JaffaCakes118.exe	sc.exe
PID 2700 wrote to memory of 2896	2700	697e454ef3dd9e8d48fb61cecd2cf76b_JaffaCakes118.exe	sc.exe
PID 2700 wrote to memory of 2896	2700	697e454ef3dd9e8d48fb61cecd2cf76b_JaffaCakes118.exe	sc.exe
PID 2700 wrote to memory of 2884	2700	697e454ef3dd9e8d48fb61cecd2cf76b_JaffaCakes118.exe	sc.exe
PID 2700 wrote to memory of 2884	2700	697e454ef3dd9e8d48fb61cecd2cf76b_JaffaCakes118.exe	sc.exe
PID 2700 wrote to memory of 2884	2700	697e454ef3dd9e8d48fb61cecd2cf76b_JaffaCakes118.exe	sc.exe
PID 2700 wrote to memory of 2884	2700	697e454ef3dd9e8d48fb61cecd2cf76b_JaffaCakes118.exe	sc.exe
PID 2700 wrote to memory of 2328	2700	697e454ef3dd9e8d48fb61cecd2cf76b_JaffaCakes118.exe	netsh.exe
PID 2700 wrote to memory of 2328	2700	697e454ef3dd9e8d48fb61cecd2cf76b_JaffaCakes118.exe	netsh.exe
PID 2700 wrote to memory of 2328	2700	697e454ef3dd9e8d48fb61cecd2cf76b_JaffaCakes118.exe	netsh.exe
PID 2700 wrote to memory of 2328	2700	697e454ef3dd9e8d48fb61cecd2cf76b_JaffaCakes118.exe	netsh.exe
PID 2772 wrote to memory of 1872	2772	nzuryxxl.exe	svchost.exe
PID 2772 wrote to memory of 1872	2772	nzuryxxl.exe	svchost.exe
PID 2772 wrote to memory of 1872	2772	nzuryxxl.exe	svchost.exe
PID 2772 wrote to memory of 1872	2772	nzuryxxl.exe	svchost.exe
PID 2772 wrote to memory of 1872	2772	nzuryxxl.exe	svchost.exe
PID 2772 wrote to memory of 1872	2772	nzuryxxl.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\697e454ef3dd9e8d48fb61cecd2cf76b_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\697e454ef3dd9e8d48fb61cecd2cf76b_JaffaCakes118.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2700

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\cdzbxkfb\
2⤵
- System Location Discovery: System Language Discovery
PID:2756

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\nzuryxxl.exe" C:\Windows\SysWOW64\cdzbxkfb\
2⤵
- System Location Discovery: System Language Discovery
PID:2888

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create cdzbxkfb binPath= "C:\Windows\SysWOW64\cdzbxkfb\nzuryxxl.exe /d\"C:\Users\Admin\AppData\Local\Temp\697e454ef3dd9e8d48fb61cecd2cf76b_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
- System Location Discovery: System Language Discovery
PID:2740

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description cdzbxkfb "wifi internet conection"
2⤵
- Launches sc.exe
- System Location Discovery: System Language Discovery
PID:2896

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start cdzbxkfb
2⤵
- Launches sc.exe
- System Location Discovery: System Language Discovery
PID:2884

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:2328

C:\Windows\SysWOW64\cdzbxkfb\nzuryxxl.exe
C:\Windows\SysWOW64\cdzbxkfb\nzuryxxl.exe /d"C:\Users\Admin\AppData\Local\Temp\697e454ef3dd9e8d48fb61cecd2cf76b_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2772

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:1872

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

1

T1569

Service Execution

1

T1569.002

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Defense Evasion

Impair Defenses

2

T1562

Disable or Modify System Firewall

1

T1562.004

Disable or Modify Tools

Modify Registry

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\nzuryxxl.exe
Filesize
10.2MB

MD5
10d9d60967fd3c2f496c50dc219a94ae

SHA1
2701ab7bbfacad2a9e7948f0ca9f6e4028b9aca1

SHA256
b2464ccb438cbd581f715947eda6c46d7c232c4b3f3a5f7735fccbe3dec487ae

SHA512
be2a32bde14c8fa400cf460d930a764f60f54590439d5d4bfdbaac35f1ae4b2520f42ed28d428c1ea37cad35122d43419370391f543b1d3f0f73b57d7ea115e2

Download Submit
memory/1872-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1872-11-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1872-14-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1872-17-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1872-18-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2700-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2700-2-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/2700-8-0x0000000000400000-0x0000000000871000-memory.dmp

Filesize
4.4MB

Download
memory/2700-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2700-9-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/2700-1-0x00000000009D0000-0x0000000000AD0000-memory.dmp

Filesize
1024KB

Download
memory/2772-16-0x0000000000400000-0x0000000000871000-memory.dmp

Filesize
4.4MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads