tofsee | b8c7e8989b4fb3b7624a69e30f9c629e5bc4f09687f1a254d157684ce2d7c501

General

Target

a29fc6aeae4e6f1b7adaea5606e9b839_JaffaCakes118.exe
Size

11.0MB
MD5

a29fc6aeae4e6f1b7adaea5606e9b839
SHA1

14ff72f09589a7319189e0d6aac5f8338cf2f382
SHA256

b8c7e8989b4fb3b7624a69e30f9c629e5bc4f09687f1a254d157684ce2d7c501
SHA512

93cb8fe859e86de40681cc6205a05b6569e131fe21e2798a9aab29103c1450115a1c7323675f76ee2c18c5418e3fa9b6ea46b4a36fd24a6fc2e6c361baaa2819
SSDEEP

12288:+6oEnffffffffffffffffffffffffffffffffffffffffffffffffffffffffff/:+6

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
3024	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\eymhotmy\ImagePath = "C:\\Windows\\SysWOW64\\eymhotmy\\yfighhxl.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-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	a29fc6aeae4e6f1b7adaea5606e9b839_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
3784	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4436	yfighhxl.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4436 set thread context of 3784	4436	yfighhxl.exe	107

Launches sc.exe 3 IoCs

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

pid	Process
4488	sc.exe
4572	sc.exe
2916	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 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

pid	pid_target	Process	procid_target
2080	2752	WerFault.exe	82
4276	4436	WerFault.exe	100

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	yfighhxl.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a29fc6aeae4e6f1b7adaea5606e9b839_JaffaCakes118.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	netsh.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2752 wrote to memory of 4768	2752	a29fc6aeae4e6f1b7adaea5606e9b839_JaffaCakes118.exe	83
PID 2752 wrote to memory of 4768	2752	a29fc6aeae4e6f1b7adaea5606e9b839_JaffaCakes118.exe	83
PID 2752 wrote to memory of 4768	2752	a29fc6aeae4e6f1b7adaea5606e9b839_JaffaCakes118.exe	83
PID 2752 wrote to memory of 3940	2752	a29fc6aeae4e6f1b7adaea5606e9b839_JaffaCakes118.exe	85
PID 2752 wrote to memory of 3940	2752	a29fc6aeae4e6f1b7adaea5606e9b839_JaffaCakes118.exe	85
PID 2752 wrote to memory of 3940	2752	a29fc6aeae4e6f1b7adaea5606e9b839_JaffaCakes118.exe	85
PID 2752 wrote to memory of 4572	2752	a29fc6aeae4e6f1b7adaea5606e9b839_JaffaCakes118.exe	90
PID 2752 wrote to memory of 4572	2752	a29fc6aeae4e6f1b7adaea5606e9b839_JaffaCakes118.exe	90
PID 2752 wrote to memory of 4572	2752	a29fc6aeae4e6f1b7adaea5606e9b839_JaffaCakes118.exe	90
PID 2752 wrote to memory of 2916	2752	a29fc6aeae4e6f1b7adaea5606e9b839_JaffaCakes118.exe	92
PID 2752 wrote to memory of 2916	2752	a29fc6aeae4e6f1b7adaea5606e9b839_JaffaCakes118.exe	92
PID 2752 wrote to memory of 2916	2752	a29fc6aeae4e6f1b7adaea5606e9b839_JaffaCakes118.exe	92
PID 2752 wrote to memory of 4488	2752	a29fc6aeae4e6f1b7adaea5606e9b839_JaffaCakes118.exe	98
PID 2752 wrote to memory of 4488	2752	a29fc6aeae4e6f1b7adaea5606e9b839_JaffaCakes118.exe	98
PID 2752 wrote to memory of 4488	2752	a29fc6aeae4e6f1b7adaea5606e9b839_JaffaCakes118.exe	98
PID 2752 wrote to memory of 3024	2752	a29fc6aeae4e6f1b7adaea5606e9b839_JaffaCakes118.exe	101
PID 2752 wrote to memory of 3024	2752	a29fc6aeae4e6f1b7adaea5606e9b839_JaffaCakes118.exe	101
PID 2752 wrote to memory of 3024	2752	a29fc6aeae4e6f1b7adaea5606e9b839_JaffaCakes118.exe	101
PID 4436 wrote to memory of 3784	4436	yfighhxl.exe	107
PID 4436 wrote to memory of 3784	4436	yfighhxl.exe	107
PID 4436 wrote to memory of 3784	4436	yfighhxl.exe	107
PID 4436 wrote to memory of 3784	4436	yfighhxl.exe	107
PID 4436 wrote to memory of 3784	4436	yfighhxl.exe	107

C:\Users\Admin\AppData\Local\Temp\a29fc6aeae4e6f1b7adaea5606e9b839_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\a29fc6aeae4e6f1b7adaea5606e9b839_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2752
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\eymhotmy\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4768
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\yfighhxl.exe" C:\Windows\SysWOW64\eymhotmy\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3940
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create eymhotmy binPath= "C:\Windows\SysWOW64\eymhotmy\yfighhxl.exe /d\"C:\Users\Admin\AppData\Local\Temp\a29fc6aeae4e6f1b7adaea5606e9b839_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4572
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description eymhotmy "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2916
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start eymhotmy
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4488
- 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:3024
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2752 -s 1184
  2⤵
  - Program crash
  PID:2080

C:\Windows\SysWOW64\eymhotmy\yfighhxl.exe
C:\Windows\SysWOW64\eymhotmy\yfighhxl.exe /d"C:\Users\Admin\AppData\Local\Temp\a29fc6aeae4e6f1b7adaea5606e9b839_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4436
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:3784
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4436 -s 248
  2⤵
  - Program crash
  PID:4276

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 2752 -ip 2752
1⤵
PID:3964

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 4436 -ip 4436
1⤵
PID:1920

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\yfighhxl.exe

Filesize
11.2MB

MD5
6bc86a020a87a6332312376e2e343c5b

SHA1
6a185be14ae8294ede919b4fc8df376a0e67b47a

SHA256
55746f2609fe4d1224acac4e8806ab75395baced18843a85d7164a070c87580c

SHA512
4e1b9ca57f302a80d8e6669423902596411eb7e9eace13a46bbf92cfc368a10f98b8752bfcc1c1062ec832a18516f7dd03e34e9b119900e5320d9ed0a0975031

Download Submit
memory/2752-8-0x0000000000400000-0x00000000004AD000-memory.dmp

Filesize
692KB

Download
memory/2752-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2752-2-0x0000000002200000-0x0000000002213000-memory.dmp

Filesize
76KB

Download
memory/2752-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2752-9-0x0000000002200000-0x0000000002213000-memory.dmp

Filesize
76KB

Download
memory/2752-1-0x0000000000590000-0x0000000000690000-memory.dmp

Filesize
1024KB

Download
memory/3784-14-0x0000000000980000-0x0000000000995000-memory.dmp

Filesize
84KB

Download
memory/3784-16-0x0000000000980000-0x0000000000995000-memory.dmp

Filesize
84KB

Download
memory/3784-17-0x0000000000980000-0x0000000000995000-memory.dmp

Filesize
84KB

Download
memory/4436-11-0x0000000000400000-0x00000000004AD000-memory.dmp

Filesize
692KB

Download
memory/4436-13-0x0000000000400000-0x00000000004AD000-memory.dmp

Filesize
692KB

Download
memory/4436-12-0x0000000000400000-0x00000000004AD000-memory.dmp

Filesize
692KB

Download
memory/4436-19-0x0000000000400000-0x00000000004AD000-memory.dmp

Filesize
692KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads