tofsee | 4cf9da9215e2027a3cfc21491b44c75b469d75a74941fe8c2f3e43ce1c91d0df

General

Target

JaffaCakes118_4cf9da9215e2027a3cfc21491b44c75b469d75a74941fe8c2f3e43ce1c91d0df.exe
Size

315KB
MD5

e0b4e6f9450122319cc01978d3639e83
SHA1

aba9a8fca5e86afbde8215f2ae2c51fae913c149
SHA256

4cf9da9215e2027a3cfc21491b44c75b469d75a74941fe8c2f3e43ce1c91d0df
SHA512

c8064816a580626a74cd12da0028d8b9c7640a2bebe53d2995fbe75f3b49dc7ddf1599d4f049cadae0596ed0a044ab96735db397b1deddb861b48e0ad2bc4355
SSDEEP

3072:zchCKOmpAL2s8t5dKQY4dJh1tGbLl0k284e2BxWH8IL+ntGCMjjjjjjjjo:IkIAL2s8924DtG90k2DLDA8ltGCM

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
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
2952	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\wkkkkujr\ImagePath = "C:\\Windows\\SysWOW64\\wkkkkujr\\nemkupwk.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-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation	JaffaCakes118_4cf9da9215e2027a3cfc21491b44c75b469d75a74941fe8c2f3e43ce1c91d0df.exe

Deletes itself 1 IoCs

pid	Process
4104	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3276	nemkupwk.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3276 set thread context of 4104	3276	nemkupwk.exe	105

Launches sc.exe 3 IoCs

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

pid	Process
2916	sc.exe
3608	sc.exe
1828	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
4636	2316	WerFault.exe	81
4976	3276	WerFault.exe	97

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	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_4cf9da9215e2027a3cfc21491b44c75b469d75a74941fe8c2f3e43ce1c91d0df.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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	nemkupwk.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2316 wrote to memory of 1360	2316	JaffaCakes118_4cf9da9215e2027a3cfc21491b44c75b469d75a74941fe8c2f3e43ce1c91d0df.exe	86
PID 2316 wrote to memory of 1360	2316	JaffaCakes118_4cf9da9215e2027a3cfc21491b44c75b469d75a74941fe8c2f3e43ce1c91d0df.exe	86
PID 2316 wrote to memory of 1360	2316	JaffaCakes118_4cf9da9215e2027a3cfc21491b44c75b469d75a74941fe8c2f3e43ce1c91d0df.exe	86
PID 2316 wrote to memory of 2812	2316	JaffaCakes118_4cf9da9215e2027a3cfc21491b44c75b469d75a74941fe8c2f3e43ce1c91d0df.exe	89
PID 2316 wrote to memory of 2812	2316	JaffaCakes118_4cf9da9215e2027a3cfc21491b44c75b469d75a74941fe8c2f3e43ce1c91d0df.exe	89
PID 2316 wrote to memory of 2812	2316	JaffaCakes118_4cf9da9215e2027a3cfc21491b44c75b469d75a74941fe8c2f3e43ce1c91d0df.exe	89
PID 2316 wrote to memory of 2916	2316	JaffaCakes118_4cf9da9215e2027a3cfc21491b44c75b469d75a74941fe8c2f3e43ce1c91d0df.exe	91
PID 2316 wrote to memory of 2916	2316	JaffaCakes118_4cf9da9215e2027a3cfc21491b44c75b469d75a74941fe8c2f3e43ce1c91d0df.exe	91
PID 2316 wrote to memory of 2916	2316	JaffaCakes118_4cf9da9215e2027a3cfc21491b44c75b469d75a74941fe8c2f3e43ce1c91d0df.exe	91
PID 2316 wrote to memory of 3608	2316	JaffaCakes118_4cf9da9215e2027a3cfc21491b44c75b469d75a74941fe8c2f3e43ce1c91d0df.exe	93
PID 2316 wrote to memory of 3608	2316	JaffaCakes118_4cf9da9215e2027a3cfc21491b44c75b469d75a74941fe8c2f3e43ce1c91d0df.exe	93
PID 2316 wrote to memory of 3608	2316	JaffaCakes118_4cf9da9215e2027a3cfc21491b44c75b469d75a74941fe8c2f3e43ce1c91d0df.exe	93
PID 2316 wrote to memory of 1828	2316	JaffaCakes118_4cf9da9215e2027a3cfc21491b44c75b469d75a74941fe8c2f3e43ce1c91d0df.exe	95
PID 2316 wrote to memory of 1828	2316	JaffaCakes118_4cf9da9215e2027a3cfc21491b44c75b469d75a74941fe8c2f3e43ce1c91d0df.exe	95
PID 2316 wrote to memory of 1828	2316	JaffaCakes118_4cf9da9215e2027a3cfc21491b44c75b469d75a74941fe8c2f3e43ce1c91d0df.exe	95
PID 2316 wrote to memory of 2952	2316	JaffaCakes118_4cf9da9215e2027a3cfc21491b44c75b469d75a74941fe8c2f3e43ce1c91d0df.exe	98
PID 2316 wrote to memory of 2952	2316	JaffaCakes118_4cf9da9215e2027a3cfc21491b44c75b469d75a74941fe8c2f3e43ce1c91d0df.exe	98
PID 2316 wrote to memory of 2952	2316	JaffaCakes118_4cf9da9215e2027a3cfc21491b44c75b469d75a74941fe8c2f3e43ce1c91d0df.exe	98
PID 3276 wrote to memory of 4104	3276	nemkupwk.exe	105
PID 3276 wrote to memory of 4104	3276	nemkupwk.exe	105
PID 3276 wrote to memory of 4104	3276	nemkupwk.exe	105
PID 3276 wrote to memory of 4104	3276	nemkupwk.exe	105
PID 3276 wrote to memory of 4104	3276	nemkupwk.exe	105

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_4cf9da9215e2027a3cfc21491b44c75b469d75a74941fe8c2f3e43ce1c91d0df.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_4cf9da9215e2027a3cfc21491b44c75b469d75a74941fe8c2f3e43ce1c91d0df.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2316
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\wkkkkujr\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1360
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\nemkupwk.exe" C:\Windows\SysWOW64\wkkkkujr\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2812
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create wkkkkujr binPath= "C:\Windows\SysWOW64\wkkkkujr\nemkupwk.exe /d\"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_4cf9da9215e2027a3cfc21491b44c75b469d75a74941fe8c2f3e43ce1c91d0df.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2916
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description wkkkkujr "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3608
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start wkkkkujr
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1828
- 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:2952
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2316 -s 576
  2⤵
  - Program crash
  PID:4636

C:\Windows\SysWOW64\wkkkkujr\nemkupwk.exe
C:\Windows\SysWOW64\wkkkkujr\nemkupwk.exe /d"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_4cf9da9215e2027a3cfc21491b44c75b469d75a74941fe8c2f3e43ce1c91d0df.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3276
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:4104
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3276 -s 540
  2⤵
  - Program crash
  PID:4976

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 2316 -ip 2316
1⤵
PID:996

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 364 -p 3276 -ip 3276
1⤵
PID:3260

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\nemkupwk.exe

Filesize
12.1MB

MD5
002e7e61e1ede3f7fd6a4250053153de

SHA1
aeeada6010f90c417a8a42e27e13e3b3dbb9e726

SHA256
404095e8ddd631d6f9fae1b1ae7464cb75dfb216a22927cf5e42808e78397b83

SHA512
057d84413c1165771a4eaabb4c11fc886bacbb30a350730cc477e98208db85547cfdadccc0943487661fd1dee65364a2234f498d072a09560546ab0d217ed047

Download Submit
memory/2316-0-0x00000000047A0000-0x00000000047AD000-memory.dmp

Filesize
52KB

Download
memory/2316-1-0x00000000047B0000-0x00000000047C3000-memory.dmp

Filesize
76KB

Download
memory/2316-2-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2316-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2316-8-0x00000000047B0000-0x00000000047C3000-memory.dmp

Filesize
76KB

Download
memory/2316-7-0x00000000047A0000-0x00000000047AD000-memory.dmp

Filesize
52KB

Download
memory/2316-6-0x0000000000400000-0x00000000046CF000-memory.dmp

Filesize
66.8MB

Download
memory/3276-14-0x0000000000400000-0x00000000046CF000-memory.dmp

Filesize
66.8MB

Download
memory/4104-10-0x0000000000E00000-0x0000000000E15000-memory.dmp

Filesize
84KB

Download
memory/4104-12-0x0000000000E00000-0x0000000000E15000-memory.dmp

Filesize
84KB

Download
memory/4104-13-0x0000000000E00000-0x0000000000E15000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads