tofsee | f8546b64a0638ffe8267be96d09cf4790b9a89b1719b105cd99fd84e554a04da

General

Target

0cfc8367505b43f71a3e388531f840ad_JaffaCakes118.exe
Size

12.3MB
MD5

0cfc8367505b43f71a3e388531f840ad
SHA1

666f8624dd821294c0b212f430b8a1a676b55914
SHA256

f8546b64a0638ffe8267be96d09cf4790b9a89b1719b105cd99fd84e554a04da
SHA512

daeb6fd6456767b77a97cfce33b9d411f77ae4259883e338caf83e329119f830132e49f30704593afbcd574b3575d5cceb299a446ea04d0cad94f89aaecaa110
SSDEEP

49152:E9Yfn2sTQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQT:eYP2s

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

43.231.4.7

lazystax.ru

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan 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

Processes:

netsh.exe

pid process

1212 netsh.exe

pid	process
1212	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\imncstxa\ImagePath = "C:\\Windows\\SysWOW64\\imncstxa\\cezfylv.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

Processes:

0cfc8367505b43f71a3e388531f840ad_JaffaCakes118.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-355097885-2402257403-2971294179-1000\Control Panel\International\Geo\Nation	0cfc8367505b43f71a3e388531f840ad_JaffaCakes118.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

2336 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

cezfylv.exe

pid process

1236 cezfylv.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

cezfylv.exe

description pid process target process

PID 1236 set thread context of 2336 1236 cezfylv.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

1492 sc.exe
724 sc.exe
4952 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
2336	svchost.exe

pid	process
1236	cezfylv.exe

description	pid	process	target process
PID 1236 set thread context of 2336	1236	cezfylv.exe	svchost.exe

pid	process
1492	sc.exe
724	sc.exe
4952	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 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:

cmd.execmd.execezfylv.exesvchost.exe0cfc8367505b43f71a3e388531f840ad_JaffaCakes118.exesc.exesc.exesc.exenetsh.exe

description	ioc	process
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	cezfylv.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	0cfc8367505b43f71a3e388531f840ad_JaffaCakes118.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

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

0cfc8367505b43f71a3e388531f840ad_JaffaCakes118.execezfylv.exe

description	pid	process	target process
PID 2160 wrote to memory of 5020	2160	0cfc8367505b43f71a3e388531f840ad_JaffaCakes118.exe	cmd.exe
PID 2160 wrote to memory of 5020	2160	0cfc8367505b43f71a3e388531f840ad_JaffaCakes118.exe	cmd.exe
PID 2160 wrote to memory of 5020	2160	0cfc8367505b43f71a3e388531f840ad_JaffaCakes118.exe	cmd.exe
PID 2160 wrote to memory of 2680	2160	0cfc8367505b43f71a3e388531f840ad_JaffaCakes118.exe	cmd.exe
PID 2160 wrote to memory of 2680	2160	0cfc8367505b43f71a3e388531f840ad_JaffaCakes118.exe	cmd.exe
PID 2160 wrote to memory of 2680	2160	0cfc8367505b43f71a3e388531f840ad_JaffaCakes118.exe	cmd.exe
PID 2160 wrote to memory of 1492	2160	0cfc8367505b43f71a3e388531f840ad_JaffaCakes118.exe	sc.exe
PID 2160 wrote to memory of 1492	2160	0cfc8367505b43f71a3e388531f840ad_JaffaCakes118.exe	sc.exe
PID 2160 wrote to memory of 1492	2160	0cfc8367505b43f71a3e388531f840ad_JaffaCakes118.exe	sc.exe
PID 2160 wrote to memory of 724	2160	0cfc8367505b43f71a3e388531f840ad_JaffaCakes118.exe	sc.exe
PID 2160 wrote to memory of 724	2160	0cfc8367505b43f71a3e388531f840ad_JaffaCakes118.exe	sc.exe
PID 2160 wrote to memory of 724	2160	0cfc8367505b43f71a3e388531f840ad_JaffaCakes118.exe	sc.exe
PID 2160 wrote to memory of 4952	2160	0cfc8367505b43f71a3e388531f840ad_JaffaCakes118.exe	sc.exe
PID 2160 wrote to memory of 4952	2160	0cfc8367505b43f71a3e388531f840ad_JaffaCakes118.exe	sc.exe
PID 2160 wrote to memory of 4952	2160	0cfc8367505b43f71a3e388531f840ad_JaffaCakes118.exe	sc.exe
PID 1236 wrote to memory of 2336	1236	cezfylv.exe	svchost.exe
PID 1236 wrote to memory of 2336	1236	cezfylv.exe	svchost.exe
PID 1236 wrote to memory of 2336	1236	cezfylv.exe	svchost.exe
PID 1236 wrote to memory of 2336	1236	cezfylv.exe	svchost.exe
PID 1236 wrote to memory of 2336	1236	cezfylv.exe	svchost.exe
PID 2160 wrote to memory of 1212	2160	0cfc8367505b43f71a3e388531f840ad_JaffaCakes118.exe	netsh.exe
PID 2160 wrote to memory of 1212	2160	0cfc8367505b43f71a3e388531f840ad_JaffaCakes118.exe	netsh.exe
PID 2160 wrote to memory of 1212	2160	0cfc8367505b43f71a3e388531f840ad_JaffaCakes118.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\0cfc8367505b43f71a3e388531f840ad_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\0cfc8367505b43f71a3e388531f840ad_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2160
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\imncstxa\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:5020
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\cezfylv.exe" C:\Windows\SysWOW64\imncstxa\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2680
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create imncstxa binPath= "C:\Windows\SysWOW64\imncstxa\cezfylv.exe /d\"C:\Users\Admin\AppData\Local\Temp\0cfc8367505b43f71a3e388531f840ad_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1492
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description imncstxa "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:724
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start imncstxa
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4952
- 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:1212

C:\Windows\SysWOW64\imncstxa\cezfylv.exe
C:\Windows\SysWOW64\imncstxa\cezfylv.exe /d"C:\Users\Admin\AppData\Local\Temp\0cfc8367505b43f71a3e388531f840ad_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1236
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2336

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

1

T1562

Disable or Modify System Firewall

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
10.7MB

MD5
1fabba453ed792576a7a6ac45333189b

SHA1
03d37b17a640612dde3a5d4953cb5c4972c82882

SHA256
82cf3ba7866f6f23ea083b71f22c2b9bef95da5194697a65e1e2b21b365192d9

SHA512
4e96f49340d99f1d4876099823e7be8de3bfce5bbae72b3d11db404bb158d99fe0fdad6567e731f02758bc91a6a14d4bc88ea7179202b1df505552494f3348ed

Download Submit
memory/1236-8-0x0000000000400000-0x0000000000456000-memory.dmp

Filesize
344KB

Download
memory/1236-15-0x0000000000400000-0x0000000000456000-memory.dmp

Filesize
344KB

Download
memory/1236-10-0x0000000000400000-0x0000000000456000-memory.dmp

Filesize
344KB

Download
memory/1236-9-0x0000000000400000-0x0000000000456000-memory.dmp

Filesize
344KB

Download
memory/2160-19-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2160-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2160-2-0x00000000005E0000-0x00000000005F3000-memory.dmp

Filesize
76KB

Download
memory/2160-18-0x00000000005E0000-0x00000000005F3000-memory.dmp

Filesize
76KB

Download
memory/2160-17-0x0000000000400000-0x0000000000456000-memory.dmp

Filesize
344KB

Download
memory/2160-1-0x0000000000760000-0x0000000000860000-memory.dmp

Filesize
1024KB

Download
memory/2336-11-0x0000000000B40000-0x0000000000B55000-memory.dmp

Filesize
84KB

Download
memory/2336-16-0x0000000000B40000-0x0000000000B55000-memory.dmp

Filesize
84KB

Download
memory/2336-20-0x0000000000B40000-0x0000000000B55000-memory.dmp

Filesize
84KB

Download
memory/2336-21-0x0000000000B40000-0x0000000000B55000-memory.dmp

Filesize
84KB

Download
memory/2336-22-0x0000000000B40000-0x0000000000B55000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads