tofsee | 42c7ced62147af5b8cc31c12cf3ef7d75dddaa518bf3f2beb2c7ab5d9c5dd64f

General

Target

JaffaCakes118_42c7ced62147af5b8cc31c12cf3ef7d75dddaa518bf3f2beb2c7ab5d9c5dd64f.exe
Size

240KB
MD5

ee14752b4ccb32769404996930ce3230
SHA1

09190329105e182ba82701fa0f7a731e49d4a832
SHA256

42c7ced62147af5b8cc31c12cf3ef7d75dddaa518bf3f2beb2c7ab5d9c5dd64f
SHA512

15e5335cf214351f5ffb058fd8642018af62ed9e71f84ac42dc90d79f78755ac2d12abfc3716777ceaeb80cbc90a679cf32117741aa5e6d83e88a3a17763b264
SSDEEP

3072:NXMJhiithleXQDIQMoCrjXm0a477yPY5tT7/iuiRNOuzUlDCtut:NIsCeADtmrjX+0n/iTRUxj

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
3216	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\okfjrwwk\ImagePath = "C:\\Windows\\SysWOW64\\okfjrwwk\\wueccsbr.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-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	JaffaCakes118_42c7ced62147af5b8cc31c12cf3ef7d75dddaa518bf3f2beb2c7ab5d9c5dd64f.exe

Deletes itself 1 IoCs

pid	Process
1148	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4040	wueccsbr.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4040 set thread context of 1148	4040	wueccsbr.exe	98

Launches sc.exe 3 IoCs

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

pid	Process
516	sc.exe
3864	sc.exe
1500	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 value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

Program crash 2 IoCs

pid	pid_target	Process	procid_target
2616	1620	WerFault.exe	81
4880	4040	WerFault.exe	92

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	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	wueccsbr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_42c7ced62147af5b8cc31c12cf3ef7d75dddaa518bf3f2beb2c7ab5d9c5dd64f.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 1620 wrote to memory of 4060	1620	JaffaCakes118_42c7ced62147af5b8cc31c12cf3ef7d75dddaa518bf3f2beb2c7ab5d9c5dd64f.exe	82
PID 1620 wrote to memory of 4060	1620	JaffaCakes118_42c7ced62147af5b8cc31c12cf3ef7d75dddaa518bf3f2beb2c7ab5d9c5dd64f.exe	82
PID 1620 wrote to memory of 4060	1620	JaffaCakes118_42c7ced62147af5b8cc31c12cf3ef7d75dddaa518bf3f2beb2c7ab5d9c5dd64f.exe	82
PID 1620 wrote to memory of 4032	1620	JaffaCakes118_42c7ced62147af5b8cc31c12cf3ef7d75dddaa518bf3f2beb2c7ab5d9c5dd64f.exe	84
PID 1620 wrote to memory of 4032	1620	JaffaCakes118_42c7ced62147af5b8cc31c12cf3ef7d75dddaa518bf3f2beb2c7ab5d9c5dd64f.exe	84
PID 1620 wrote to memory of 4032	1620	JaffaCakes118_42c7ced62147af5b8cc31c12cf3ef7d75dddaa518bf3f2beb2c7ab5d9c5dd64f.exe	84
PID 1620 wrote to memory of 3864	1620	JaffaCakes118_42c7ced62147af5b8cc31c12cf3ef7d75dddaa518bf3f2beb2c7ab5d9c5dd64f.exe	86
PID 1620 wrote to memory of 3864	1620	JaffaCakes118_42c7ced62147af5b8cc31c12cf3ef7d75dddaa518bf3f2beb2c7ab5d9c5dd64f.exe	86
PID 1620 wrote to memory of 3864	1620	JaffaCakes118_42c7ced62147af5b8cc31c12cf3ef7d75dddaa518bf3f2beb2c7ab5d9c5dd64f.exe	86
PID 1620 wrote to memory of 1500	1620	JaffaCakes118_42c7ced62147af5b8cc31c12cf3ef7d75dddaa518bf3f2beb2c7ab5d9c5dd64f.exe	88
PID 1620 wrote to memory of 1500	1620	JaffaCakes118_42c7ced62147af5b8cc31c12cf3ef7d75dddaa518bf3f2beb2c7ab5d9c5dd64f.exe	88
PID 1620 wrote to memory of 1500	1620	JaffaCakes118_42c7ced62147af5b8cc31c12cf3ef7d75dddaa518bf3f2beb2c7ab5d9c5dd64f.exe	88
PID 1620 wrote to memory of 516	1620	JaffaCakes118_42c7ced62147af5b8cc31c12cf3ef7d75dddaa518bf3f2beb2c7ab5d9c5dd64f.exe	90
PID 1620 wrote to memory of 516	1620	JaffaCakes118_42c7ced62147af5b8cc31c12cf3ef7d75dddaa518bf3f2beb2c7ab5d9c5dd64f.exe	90
PID 1620 wrote to memory of 516	1620	JaffaCakes118_42c7ced62147af5b8cc31c12cf3ef7d75dddaa518bf3f2beb2c7ab5d9c5dd64f.exe	90
PID 1620 wrote to memory of 3216	1620	JaffaCakes118_42c7ced62147af5b8cc31c12cf3ef7d75dddaa518bf3f2beb2c7ab5d9c5dd64f.exe	93
PID 1620 wrote to memory of 3216	1620	JaffaCakes118_42c7ced62147af5b8cc31c12cf3ef7d75dddaa518bf3f2beb2c7ab5d9c5dd64f.exe	93
PID 1620 wrote to memory of 3216	1620	JaffaCakes118_42c7ced62147af5b8cc31c12cf3ef7d75dddaa518bf3f2beb2c7ab5d9c5dd64f.exe	93
PID 4040 wrote to memory of 1148	4040	wueccsbr.exe	98
PID 4040 wrote to memory of 1148	4040	wueccsbr.exe	98
PID 4040 wrote to memory of 1148	4040	wueccsbr.exe	98
PID 4040 wrote to memory of 1148	4040	wueccsbr.exe	98
PID 4040 wrote to memory of 1148	4040	wueccsbr.exe	98

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_42c7ced62147af5b8cc31c12cf3ef7d75dddaa518bf3f2beb2c7ab5d9c5dd64f.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_42c7ced62147af5b8cc31c12cf3ef7d75dddaa518bf3f2beb2c7ab5d9c5dd64f.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1620
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\okfjrwwk\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4060
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\wueccsbr.exe" C:\Windows\SysWOW64\okfjrwwk\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4032
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create okfjrwwk binPath= "C:\Windows\SysWOW64\okfjrwwk\wueccsbr.exe /d\"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_42c7ced62147af5b8cc31c12cf3ef7d75dddaa518bf3f2beb2c7ab5d9c5dd64f.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3864
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description okfjrwwk "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1500
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start okfjrwwk
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:516
- 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:3216
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1620 -s 1312
  2⤵
  - Program crash
  PID:2616

C:\Windows\SysWOW64\okfjrwwk\wueccsbr.exe
C:\Windows\SysWOW64\okfjrwwk\wueccsbr.exe /d"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_42c7ced62147af5b8cc31c12cf3ef7d75dddaa518bf3f2beb2c7ab5d9c5dd64f.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4040
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:1148
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4040 -s 520
  2⤵
  - Program crash
  PID:4880

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1620 -ip 1620
1⤵
PID:2088

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 540 -p 4040 -ip 4040
1⤵
PID:3264

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\wueccsbr.exe

Filesize
14.5MB

MD5
3f3907d0bcf04fb6836c6a17bc87b5c8

SHA1
fa3bb5614bbb9c040546d373f0da25f7c8329479

SHA256
72d31cb012cd779152ce67da5680da40fbcc630abeee613b15e743160e51a44f

SHA512
033a8c467756a81a2900a3b46871e410b7e23fc5755e27002441f6e6cd5446f25844969843541647bea5901af7fad86f43b1ac8763de3caf7ffb82c9dd05f1d6

Download Submit
memory/1148-8-0x0000000000DD0000-0x0000000000DE5000-memory.dmp

Filesize
84KB

Download
memory/1148-16-0x0000000000DD0000-0x0000000000DE5000-memory.dmp

Filesize
84KB

Download
memory/1148-17-0x0000000000DD0000-0x0000000000DE5000-memory.dmp

Filesize
84KB

Download
memory/1620-1-0x0000000000A20000-0x0000000000B20000-memory.dmp

Filesize
1024KB

Download
memory/1620-2-0x00000000008E0000-0x00000000008F3000-memory.dmp

Filesize
76KB

Download
memory/1620-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1620-15-0x00000000008E0000-0x00000000008F3000-memory.dmp

Filesize
76KB

Download
memory/1620-13-0x0000000000400000-0x000000000086C000-memory.dmp

Filesize
4.4MB

Download
memory/1620-14-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4040-9-0x0000000000400000-0x000000000086C000-memory.dmp

Filesize
4.4MB

Download
memory/4040-11-0x0000000000400000-0x000000000086C000-memory.dmp

Filesize
4.4MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads