tofsee | f3563edb147f446d1ce0b58c6254619b17808ff2506c3f2ad32e11ed7910dacd

General

Target

JaffaCakes118_35aa868b9edc2ce3a80f966bf60815a4.exe
Size

12.1MB
MD5

35aa868b9edc2ce3a80f966bf60815a4
SHA1

f0d8809ec1d4fcb47277fefc601028b3aa22044e
SHA256

f3563edb147f446d1ce0b58c6254619b17808ff2506c3f2ad32e11ed7910dacd
SHA512

68ff649ff5c186e19e163a44b3f65e52d3e961b2d2a120103d37734355a03c5ab7c25f220dcb11e74d5ec2a6d6fb429ff273e46f3b441fc5ec3f62108165842d
SSDEEP

49152:LN8888888888888888888888888888888888888888888888888888888888888f:

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

quadoil.ru

lakeflex.ru

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
1348	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\irklfrqv\ImagePath = "C:\\Windows\\SysWOW64\\irklfrqv\\rkykcwyl.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-1-5-21-2045521122-590294423-3465680274-1000\Control Panel\International\Geo\Nation	JaffaCakes118_35aa868b9edc2ce3a80f966bf60815a4.exe

Deletes itself 1 IoCs

pid	Process
4372	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3540	rkykcwyl.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3540 set thread context of 4372	3540	rkykcwyl.exe	100

Launches sc.exe 3 IoCs

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

pid	Process
1872	sc.exe
1224	sc.exe
1556	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
4812	644	WerFault.exe	82
4736	3540	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	JaffaCakes118_35aa868b9edc2ce3a80f966bf60815a4.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rkykcwyl.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.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	netsh.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 644 wrote to memory of 5020	644	JaffaCakes118_35aa868b9edc2ce3a80f966bf60815a4.exe	83
PID 644 wrote to memory of 5020	644	JaffaCakes118_35aa868b9edc2ce3a80f966bf60815a4.exe	83
PID 644 wrote to memory of 5020	644	JaffaCakes118_35aa868b9edc2ce3a80f966bf60815a4.exe	83
PID 644 wrote to memory of 2356	644	JaffaCakes118_35aa868b9edc2ce3a80f966bf60815a4.exe	85
PID 644 wrote to memory of 2356	644	JaffaCakes118_35aa868b9edc2ce3a80f966bf60815a4.exe	85
PID 644 wrote to memory of 2356	644	JaffaCakes118_35aa868b9edc2ce3a80f966bf60815a4.exe	85
PID 644 wrote to memory of 1872	644	JaffaCakes118_35aa868b9edc2ce3a80f966bf60815a4.exe	87
PID 644 wrote to memory of 1872	644	JaffaCakes118_35aa868b9edc2ce3a80f966bf60815a4.exe	87
PID 644 wrote to memory of 1872	644	JaffaCakes118_35aa868b9edc2ce3a80f966bf60815a4.exe	87
PID 644 wrote to memory of 1224	644	JaffaCakes118_35aa868b9edc2ce3a80f966bf60815a4.exe	89
PID 644 wrote to memory of 1224	644	JaffaCakes118_35aa868b9edc2ce3a80f966bf60815a4.exe	89
PID 644 wrote to memory of 1224	644	JaffaCakes118_35aa868b9edc2ce3a80f966bf60815a4.exe	89
PID 644 wrote to memory of 1556	644	JaffaCakes118_35aa868b9edc2ce3a80f966bf60815a4.exe	91
PID 644 wrote to memory of 1556	644	JaffaCakes118_35aa868b9edc2ce3a80f966bf60815a4.exe	91
PID 644 wrote to memory of 1556	644	JaffaCakes118_35aa868b9edc2ce3a80f966bf60815a4.exe	91
PID 644 wrote to memory of 1348	644	JaffaCakes118_35aa868b9edc2ce3a80f966bf60815a4.exe	94
PID 644 wrote to memory of 1348	644	JaffaCakes118_35aa868b9edc2ce3a80f966bf60815a4.exe	94
PID 644 wrote to memory of 1348	644	JaffaCakes118_35aa868b9edc2ce3a80f966bf60815a4.exe	94
PID 3540 wrote to memory of 4372	3540	rkykcwyl.exe	100
PID 3540 wrote to memory of 4372	3540	rkykcwyl.exe	100
PID 3540 wrote to memory of 4372	3540	rkykcwyl.exe	100
PID 3540 wrote to memory of 4372	3540	rkykcwyl.exe	100
PID 3540 wrote to memory of 4372	3540	rkykcwyl.exe	100

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_35aa868b9edc2ce3a80f966bf60815a4.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_35aa868b9edc2ce3a80f966bf60815a4.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:644
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\irklfrqv\
  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\rkykcwyl.exe" C:\Windows\SysWOW64\irklfrqv\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2356
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create irklfrqv binPath= "C:\Windows\SysWOW64\irklfrqv\rkykcwyl.exe /d\"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_35aa868b9edc2ce3a80f966bf60815a4.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1872
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description irklfrqv "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1224
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start irklfrqv
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1556
- 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:1348
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 644 -s 664
  2⤵
  - Program crash
  PID:4812

C:\Windows\SysWOW64\irklfrqv\rkykcwyl.exe
C:\Windows\SysWOW64\irklfrqv\rkykcwyl.exe /d"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_35aa868b9edc2ce3a80f966bf60815a4.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3540
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:4372
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3540 -s 516
  2⤵
  - Program crash
  PID:4736

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 644 -ip 644
1⤵
PID:4972

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 3540 -ip 3540
1⤵
PID:2960

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\rkykcwyl.exe

Filesize
13.9MB

MD5
f9d11c8f8e8847d045273ce1f125108d

SHA1
8bc953623911512ce4255893049647ce1dc05308

SHA256
a4f10cae3e580dfe2a03d79733fcb5f96f02591c40f871820bcc1ab2ac326940

SHA512
a25e59112f3bfe6d7f1e25fea5ed883db48555da25b67e36a533fca516b7faecf44f79ddd165bfe8f057198851dd8884688954c1d81265c954bf75947eb9ba7d

Download Submit
memory/644-0-0x00000000030C0000-0x00000000030CD000-memory.dmp

Filesize
52KB

Download
memory/644-1-0x00000000030D0000-0x00000000030E3000-memory.dmp

Filesize
76KB

Download
memory/644-2-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/644-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/644-7-0x00000000030C0000-0x00000000030CD000-memory.dmp

Filesize
52KB

Download
memory/644-6-0x0000000000400000-0x0000000002F05000-memory.dmp

Filesize
43.0MB

Download
memory/644-8-0x00000000030D0000-0x00000000030E3000-memory.dmp

Filesize
76KB

Download
memory/3540-14-0x0000000000400000-0x0000000002F05000-memory.dmp

Filesize
43.0MB

Download
memory/4372-10-0x0000000000D70000-0x0000000000D85000-memory.dmp

Filesize
84KB

Download
memory/4372-12-0x0000000000D70000-0x0000000000D85000-memory.dmp

Filesize
84KB

Download
memory/4372-13-0x0000000000D70000-0x0000000000D85000-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