tofsee | 8cd84dc12851b50d99f1c1d389b3a67dea5879abb6a64c58f89644d6384202ac

General

Target

69071a916163e2ed6f4aae9e3438c917_JaffaCakes118.exe
Size

12.3MB
MD5

69071a916163e2ed6f4aae9e3438c917
SHA1

0f944af914e5b4a96ee95b39993c71fd24861ff7
SHA256

8cd84dc12851b50d99f1c1d389b3a67dea5879abb6a64c58f89644d6384202ac
SHA512

6b586a81be7fa9cf39e66a54d7cdb19af1dea34533197f06f52315bfa64cd64c6ebcabfa38381a6a3a098e2c922e7f2fb7c77e8253179a5a77b52928e2a64582
SSDEEP

49152:Q8yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyj:Q

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

43.231.4.6

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

pid	Process
832	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\nsketuqh\ImagePath = "C:\\Windows\\SysWOW64\\nsketuqh\\gtsxhsyc.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	69071a916163e2ed6f4aae9e3438c917_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
3032	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4212	gtsxhsyc.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4212 set thread context of 3032	4212	gtsxhsyc.exe	109

Launches sc.exe 3 IoCs

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

pid	Process
5012	sc.exe
1504	sc.exe
1552	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
4656	4044	WerFault.exe	83
3584	4212	WerFault.exe	101

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	gtsxhsyc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	69071a916163e2ed6f4aae9e3438c917_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.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	sc.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4044 wrote to memory of 5072	4044	69071a916163e2ed6f4aae9e3438c917_JaffaCakes118.exe	90
PID 4044 wrote to memory of 5072	4044	69071a916163e2ed6f4aae9e3438c917_JaffaCakes118.exe	90
PID 4044 wrote to memory of 5072	4044	69071a916163e2ed6f4aae9e3438c917_JaffaCakes118.exe	90
PID 4044 wrote to memory of 4980	4044	69071a916163e2ed6f4aae9e3438c917_JaffaCakes118.exe	93
PID 4044 wrote to memory of 4980	4044	69071a916163e2ed6f4aae9e3438c917_JaffaCakes118.exe	93
PID 4044 wrote to memory of 4980	4044	69071a916163e2ed6f4aae9e3438c917_JaffaCakes118.exe	93
PID 4044 wrote to memory of 1504	4044	69071a916163e2ed6f4aae9e3438c917_JaffaCakes118.exe	95
PID 4044 wrote to memory of 1504	4044	69071a916163e2ed6f4aae9e3438c917_JaffaCakes118.exe	95
PID 4044 wrote to memory of 1504	4044	69071a916163e2ed6f4aae9e3438c917_JaffaCakes118.exe	95
PID 4044 wrote to memory of 1552	4044	69071a916163e2ed6f4aae9e3438c917_JaffaCakes118.exe	97
PID 4044 wrote to memory of 1552	4044	69071a916163e2ed6f4aae9e3438c917_JaffaCakes118.exe	97
PID 4044 wrote to memory of 1552	4044	69071a916163e2ed6f4aae9e3438c917_JaffaCakes118.exe	97
PID 4044 wrote to memory of 5012	4044	69071a916163e2ed6f4aae9e3438c917_JaffaCakes118.exe	99
PID 4044 wrote to memory of 5012	4044	69071a916163e2ed6f4aae9e3438c917_JaffaCakes118.exe	99
PID 4044 wrote to memory of 5012	4044	69071a916163e2ed6f4aae9e3438c917_JaffaCakes118.exe	99
PID 4044 wrote to memory of 832	4044	69071a916163e2ed6f4aae9e3438c917_JaffaCakes118.exe	102
PID 4044 wrote to memory of 832	4044	69071a916163e2ed6f4aae9e3438c917_JaffaCakes118.exe	102
PID 4044 wrote to memory of 832	4044	69071a916163e2ed6f4aae9e3438c917_JaffaCakes118.exe	102
PID 4212 wrote to memory of 3032	4212	gtsxhsyc.exe	109
PID 4212 wrote to memory of 3032	4212	gtsxhsyc.exe	109
PID 4212 wrote to memory of 3032	4212	gtsxhsyc.exe	109
PID 4212 wrote to memory of 3032	4212	gtsxhsyc.exe	109
PID 4212 wrote to memory of 3032	4212	gtsxhsyc.exe	109

C:\Users\Admin\AppData\Local\Temp\69071a916163e2ed6f4aae9e3438c917_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\69071a916163e2ed6f4aae9e3438c917_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4044
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\nsketuqh\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:5072
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\gtsxhsyc.exe" C:\Windows\SysWOW64\nsketuqh\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4980
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create nsketuqh binPath= "C:\Windows\SysWOW64\nsketuqh\gtsxhsyc.exe /d\"C:\Users\Admin\AppData\Local\Temp\69071a916163e2ed6f4aae9e3438c917_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1504
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description nsketuqh "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1552
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start nsketuqh
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:5012
- 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:832
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4044 -s 1276
  2⤵
  - Program crash
  PID:4656

C:\Windows\SysWOW64\nsketuqh\gtsxhsyc.exe
C:\Windows\SysWOW64\nsketuqh\gtsxhsyc.exe /d"C:\Users\Admin\AppData\Local\Temp\69071a916163e2ed6f4aae9e3438c917_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4212
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:3032
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4212 -s 508
  2⤵
  - Program crash
  PID:3584

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4044 -ip 4044
1⤵
PID:4780

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 4212 -ip 4212
1⤵
PID:4748

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\gtsxhsyc.exe

Filesize
10.2MB

MD5
58a4fc26daaba140051e49e335309f34

SHA1
467951de9c19bdf5ff98ca8d0acfe91b829163a0

SHA256
bc9c806dd87ee24eeca9d95eb17bce68cb828798819ada49ec4acc342a4445af

SHA512
99b915a9c43706c4873dccc5143f0264e289f7ae7aef317bfaccd8491b583a0f4d67a7c76662e3d34e2e28422eda443e4f7137373598c40fcdc68c3e45d6de37

Download Submit
memory/3032-11-0x00000000003C0000-0x00000000003D5000-memory.dmp

Filesize
84KB

Download
memory/3032-13-0x00000000003C0000-0x00000000003D5000-memory.dmp

Filesize
84KB

Download
memory/3032-14-0x00000000003C0000-0x00000000003D5000-memory.dmp

Filesize
84KB

Download
memory/4044-1-0x0000000000AC0000-0x0000000000BC0000-memory.dmp

Filesize
1024KB

Download
memory/4044-2-0x0000000000970000-0x0000000000983000-memory.dmp

Filesize
76KB

Download
memory/4044-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4044-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4044-7-0x0000000000400000-0x00000000008E9000-memory.dmp

Filesize
4.9MB

Download
memory/4044-8-0x0000000000970000-0x0000000000983000-memory.dmp

Filesize
76KB

Download
memory/4212-15-0x0000000000400000-0x00000000008E9000-memory.dmp

Filesize
4.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads