tofsee | 6a6c76468f25ca6d92463cc715fe615b2b449468a85e9c183693d8ea5a70fff1

General

Target

26a5a30af2a8f19775fb79d1679052e6_JaffaCakes118.exe
Size

235KB
MD5

26a5a30af2a8f19775fb79d1679052e6
SHA1

e1cdeb1061c6770b619412e5f06dd73121354e74
SHA256

6a6c76468f25ca6d92463cc715fe615b2b449468a85e9c183693d8ea5a70fff1
SHA512

479196b7479b87f302a16c6e99dfaa1291be9f57f2420c1d68fcc2236d86003b3105a70b1d0b3f92d141c5c5e368a05b40a57e98f19d3cf798b852860003370a
SSDEEP

3072:RHYT/V2WmOfWSnTEXvoH8Gz5sFhQ/XScsYh6gSVywo3c+:RHa5mO//H8XjiC7knGyHM

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
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
3080	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\bcmvvimr\ImagePath = "C:\\Windows\\SysWOW64\\bcmvvimr\\oxfdwybb.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:

26a5a30af2a8f19775fb79d1679052e6_JaffaCakes118.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	26a5a30af2a8f19775fb79d1679052e6_JaffaCakes118.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid	Process
4900	svchost.exe

Executes dropped EXE 1 IoCs

Processes:

oxfdwybb.exe

pid	Process
3272	oxfdwybb.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

oxfdwybb.exe

description	pid	Process	procid_target
PID 3272 set thread context of 4900	3272	oxfdwybb.exe	103

Launches sc.exe 3 IoCs

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

Processes:

sc.exesc.exesc.exe

pid	Process
3484	sc.exe
2004	sc.exe
4400	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

Processes:

netsh.exe

description	ioc	Process
Key queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

Program crash 2 IoCs

Processes:

WerFault.exeWerFault.exe

pid	pid_target	Process	procid_target
3852	3776	WerFault.exe	82
4044	3272	WerFault.exe	96

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.exesc.exesc.exesc.exenetsh.exeoxfdwybb.exesvchost.exe26a5a30af2a8f19775fb79d1679052e6_JaffaCakes118.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	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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	oxfdwybb.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	26a5a30af2a8f19775fb79d1679052e6_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

26a5a30af2a8f19775fb79d1679052e6_JaffaCakes118.exeoxfdwybb.exe

description	pid	Process	procid_target
PID 3776 wrote to memory of 4360	3776	26a5a30af2a8f19775fb79d1679052e6_JaffaCakes118.exe	86
PID 3776 wrote to memory of 4360	3776	26a5a30af2a8f19775fb79d1679052e6_JaffaCakes118.exe	86
PID 3776 wrote to memory of 4360	3776	26a5a30af2a8f19775fb79d1679052e6_JaffaCakes118.exe	86
PID 3776 wrote to memory of 1040	3776	26a5a30af2a8f19775fb79d1679052e6_JaffaCakes118.exe	88
PID 3776 wrote to memory of 1040	3776	26a5a30af2a8f19775fb79d1679052e6_JaffaCakes118.exe	88
PID 3776 wrote to memory of 1040	3776	26a5a30af2a8f19775fb79d1679052e6_JaffaCakes118.exe	88
PID 3776 wrote to memory of 2004	3776	26a5a30af2a8f19775fb79d1679052e6_JaffaCakes118.exe	90
PID 3776 wrote to memory of 2004	3776	26a5a30af2a8f19775fb79d1679052e6_JaffaCakes118.exe	90
PID 3776 wrote to memory of 2004	3776	26a5a30af2a8f19775fb79d1679052e6_JaffaCakes118.exe	90
PID 3776 wrote to memory of 4400	3776	26a5a30af2a8f19775fb79d1679052e6_JaffaCakes118.exe	92
PID 3776 wrote to memory of 4400	3776	26a5a30af2a8f19775fb79d1679052e6_JaffaCakes118.exe	92
PID 3776 wrote to memory of 4400	3776	26a5a30af2a8f19775fb79d1679052e6_JaffaCakes118.exe	92
PID 3776 wrote to memory of 3484	3776	26a5a30af2a8f19775fb79d1679052e6_JaffaCakes118.exe	94
PID 3776 wrote to memory of 3484	3776	26a5a30af2a8f19775fb79d1679052e6_JaffaCakes118.exe	94
PID 3776 wrote to memory of 3484	3776	26a5a30af2a8f19775fb79d1679052e6_JaffaCakes118.exe	94
PID 3776 wrote to memory of 3080	3776	26a5a30af2a8f19775fb79d1679052e6_JaffaCakes118.exe	97
PID 3776 wrote to memory of 3080	3776	26a5a30af2a8f19775fb79d1679052e6_JaffaCakes118.exe	97
PID 3776 wrote to memory of 3080	3776	26a5a30af2a8f19775fb79d1679052e6_JaffaCakes118.exe	97
PID 3272 wrote to memory of 4900	3272	oxfdwybb.exe	103
PID 3272 wrote to memory of 4900	3272	oxfdwybb.exe	103
PID 3272 wrote to memory of 4900	3272	oxfdwybb.exe	103
PID 3272 wrote to memory of 4900	3272	oxfdwybb.exe	103
PID 3272 wrote to memory of 4900	3272	oxfdwybb.exe	103

C:\Users\Admin\AppData\Local\Temp\26a5a30af2a8f19775fb79d1679052e6_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\26a5a30af2a8f19775fb79d1679052e6_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3776
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\bcmvvimr\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4360
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\oxfdwybb.exe" C:\Windows\SysWOW64\bcmvvimr\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1040
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create bcmvvimr binPath= "C:\Windows\SysWOW64\bcmvvimr\oxfdwybb.exe /d\"C:\Users\Admin\AppData\Local\Temp\26a5a30af2a8f19775fb79d1679052e6_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2004
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description bcmvvimr "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4400
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start bcmvvimr
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3484
- 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:3080
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3776 -s 1248
  2⤵
  - Program crash
  PID:3852

C:\Windows\SysWOW64\bcmvvimr\oxfdwybb.exe
C:\Windows\SysWOW64\bcmvvimr\oxfdwybb.exe /d"C:\Users\Admin\AppData\Local\Temp\26a5a30af2a8f19775fb79d1679052e6_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3272
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:4900
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3272 -s 536
  2⤵
  - Program crash
  PID:4044

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 3776 -ip 3776
1⤵
PID:4456

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 3272 -ip 3272
1⤵
PID:224

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\oxfdwybb.exe

Filesize
12.8MB

MD5
2ac3310f6c9e456e95c1b0f2f6d0203c

SHA1
8ae2bc9aae3517e1dba1a0b2315dd1f5cc1fcc9e

SHA256
ddbbcc86f2c0e910fb8632d9798e592b41712b18c81dd9f04269fcf881f8cb15

SHA512
9a9a892694fbc8cdf005cafc642be8a84a802624d55cf1800dba6cc64895f11b1578b6ebecb8d8a3f00851c712e5fb89b4986327439ad94da7a1b2284dab65f2

Download Submit
memory/3272-15-0x0000000000400000-0x0000000002C71000-memory.dmp

Filesize
40.4MB

Download
memory/3776-1-0x0000000002F10000-0x0000000003010000-memory.dmp

Filesize
1024KB

Download
memory/3776-2-0x00000000049C0000-0x00000000049D3000-memory.dmp

Filesize
76KB

Download
memory/3776-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3776-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3776-9-0x00000000049C0000-0x00000000049D3000-memory.dmp

Filesize
76KB

Download
memory/3776-8-0x0000000000400000-0x0000000002C71000-memory.dmp

Filesize
40.4MB

Download
memory/4900-11-0x00000000006C0000-0x00000000006D5000-memory.dmp

Filesize
84KB

Download
memory/4900-13-0x00000000006C0000-0x00000000006D5000-memory.dmp

Filesize
84KB

Download
memory/4900-14-0x00000000006C0000-0x00000000006D5000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads