tofsee | 6ee402c592b8d9a8f65b1e9871916bf8bf08118253758af2bd8d02b053b3af20

General

Target

JaffaCakes118_873d61d252596ef91e699d9c5a641119.exe
Size

12.1MB
MD5

873d61d252596ef91e699d9c5a641119
SHA1

fac32b3b99469b90641d7916d7681fef16d392c4
SHA256

6ee402c592b8d9a8f65b1e9871916bf8bf08118253758af2bd8d02b053b3af20
SHA512

66d54af51f53b35f5a6f2527da45a5a1e59b22768f3aed12631f23c61293a410c9cf08f8a5c848c9884ea418935584e47a37574659c71a4ec6441afed52b7325
SSDEEP

6144:Y1eOABi9y39q2xwt8hW5B3rmKYXIOk43AnscO:Y1PEik39bwtMGd6KK33Y

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
Tofsee family
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

pid	Process
2456	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\mdyskdpj\ImagePath = "C:\\Windows\\SysWOW64\\mdyskdpj\\lxjrrcrz.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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation	JaffaCakes118_873d61d252596ef91e699d9c5a641119.exe

Deletes itself 1 IoCs

pid	Process
3492	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4984	lxjrrcrz.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4984 set thread context of 3492	4984	lxjrrcrz.exe	100

Launches sc.exe 3 IoCs

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

pid	Process
3156	sc.exe
4928	sc.exe
4140	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

Program crash 2 IoCs

pid	pid_target	Process	procid_target
4172	3364	WerFault.exe	82
4440	4984	WerFault.exe	93

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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	lxjrrcrz.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_873d61d252596ef91e699d9c5a641119.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	cmd.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3364 wrote to memory of 3460	3364	JaffaCakes118_873d61d252596ef91e699d9c5a641119.exe	83
PID 3364 wrote to memory of 3460	3364	JaffaCakes118_873d61d252596ef91e699d9c5a641119.exe	83
PID 3364 wrote to memory of 3460	3364	JaffaCakes118_873d61d252596ef91e699d9c5a641119.exe	83
PID 3364 wrote to memory of 4600	3364	JaffaCakes118_873d61d252596ef91e699d9c5a641119.exe	85
PID 3364 wrote to memory of 4600	3364	JaffaCakes118_873d61d252596ef91e699d9c5a641119.exe	85
PID 3364 wrote to memory of 4600	3364	JaffaCakes118_873d61d252596ef91e699d9c5a641119.exe	85
PID 3364 wrote to memory of 3156	3364	JaffaCakes118_873d61d252596ef91e699d9c5a641119.exe	87
PID 3364 wrote to memory of 3156	3364	JaffaCakes118_873d61d252596ef91e699d9c5a641119.exe	87
PID 3364 wrote to memory of 3156	3364	JaffaCakes118_873d61d252596ef91e699d9c5a641119.exe	87
PID 3364 wrote to memory of 4928	3364	JaffaCakes118_873d61d252596ef91e699d9c5a641119.exe	89
PID 3364 wrote to memory of 4928	3364	JaffaCakes118_873d61d252596ef91e699d9c5a641119.exe	89
PID 3364 wrote to memory of 4928	3364	JaffaCakes118_873d61d252596ef91e699d9c5a641119.exe	89
PID 3364 wrote to memory of 4140	3364	JaffaCakes118_873d61d252596ef91e699d9c5a641119.exe	91
PID 3364 wrote to memory of 4140	3364	JaffaCakes118_873d61d252596ef91e699d9c5a641119.exe	91
PID 3364 wrote to memory of 4140	3364	JaffaCakes118_873d61d252596ef91e699d9c5a641119.exe	91
PID 3364 wrote to memory of 2456	3364	JaffaCakes118_873d61d252596ef91e699d9c5a641119.exe	94
PID 3364 wrote to memory of 2456	3364	JaffaCakes118_873d61d252596ef91e699d9c5a641119.exe	94
PID 3364 wrote to memory of 2456	3364	JaffaCakes118_873d61d252596ef91e699d9c5a641119.exe	94
PID 4984 wrote to memory of 3492	4984	lxjrrcrz.exe	100
PID 4984 wrote to memory of 3492	4984	lxjrrcrz.exe	100
PID 4984 wrote to memory of 3492	4984	lxjrrcrz.exe	100
PID 4984 wrote to memory of 3492	4984	lxjrrcrz.exe	100
PID 4984 wrote to memory of 3492	4984	lxjrrcrz.exe	100

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_873d61d252596ef91e699d9c5a641119.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_873d61d252596ef91e699d9c5a641119.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3364
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\mdyskdpj\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3460
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\lxjrrcrz.exe" C:\Windows\SysWOW64\mdyskdpj\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4600
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create mdyskdpj binPath= "C:\Windows\SysWOW64\mdyskdpj\lxjrrcrz.exe /d\"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_873d61d252596ef91e699d9c5a641119.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3156
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description mdyskdpj "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4928
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start mdyskdpj
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4140
- 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:2456
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3364 -s 1240
  2⤵
  - Program crash
  PID:4172

C:\Windows\SysWOW64\mdyskdpj\lxjrrcrz.exe
C:\Windows\SysWOW64\mdyskdpj\lxjrrcrz.exe /d"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_873d61d252596ef91e699d9c5a641119.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4984
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:3492
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4984 -s 532
  2⤵
  - Program crash
  PID:4440

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 3364 -ip 3364
1⤵
PID:1252

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 4984 -ip 4984
1⤵
PID:4340

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

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Downloads

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

Filesize
13.2MB

MD5
9e1ca664303c913979f4c63148a65bef

SHA1
c91522e991e7d5c050b298702460d8266cebb4f7

SHA256
94a8ea7c3785ea11afd6fefb7259182f5bdf9ba16b682a45cf4bfc3ea485f4ab

SHA512
59de1979c8f5dc36697df0b0df061100b7459a20ca27dd99f46cbd52437f7867a2effa229c19006b2283360cb6dea7e39e7f0aaee6c1f249cb805fed62b8f7e7

Download Submit
memory/3364-1-0x0000000002BA0000-0x0000000002CA0000-memory.dmp

Filesize
1024KB

Download
memory/3364-2-0x0000000002FF0000-0x0000000003003000-memory.dmp

Filesize
76KB

Download
memory/3364-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3364-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3364-9-0x0000000002FF0000-0x0000000003003000-memory.dmp

Filesize
76KB

Download
memory/3364-8-0x0000000000400000-0x0000000002B90000-memory.dmp

Filesize
39.6MB

Download
memory/3492-11-0x0000000000BA0000-0x0000000000BB5000-memory.dmp

Filesize
84KB

Download
memory/3492-13-0x0000000000BA0000-0x0000000000BB5000-memory.dmp

Filesize
84KB

Download
memory/3492-15-0x0000000000BA0000-0x0000000000BB5000-memory.dmp

Filesize
84KB

Download
memory/4984-14-0x0000000000400000-0x0000000002B90000-memory.dmp

Filesize
39.6MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads