tofsee | 746661a0c4d9e790a712434dcc19f56d843dc349241238a648f4eecdcc0ce5bb

General

Target

JaffaCakes118_b67ceb75930409aee4720c48e97df8d5.exe
Size

10.0MB
MD5

b67ceb75930409aee4720c48e97df8d5
SHA1

d6451ff4938f1fe6c19c54ba7eae3427d82747f7
SHA256

746661a0c4d9e790a712434dcc19f56d843dc349241238a648f4eecdcc0ce5bb
SHA512

9947d81cda80366be304b74bb2fca52ef078fb5ca1d0606d7ddc9b86d7723d9511b3ef5453ef65aed22b07c2258465538847fd81581b2e324000099560561475
SSDEEP

49152:urk7w7w7w7w7w7w7w7w7w7w7w7w7w7w7w7w7w7w7w7w7w7w7w7w7w7w7w7w7w7w7:u

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
3052	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\dawelbeb\ImagePath = "C:\\Windows\\SysWOW64\\dawelbeb\\wfzewvqm.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-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	JaffaCakes118_b67ceb75930409aee4720c48e97df8d5.exe

Deletes itself 1 IoCs

pid	Process
1668	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2392	wfzewvqm.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2392 set thread context of 1668	2392	wfzewvqm.exe	111

Launches sc.exe 3 IoCs

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

pid	Process
3456	sc.exe
4212	sc.exe
3840	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
5028	3396	WerFault.exe	82
408	2392	WerFault.exe	94

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	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	wfzewvqm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_b67ceb75930409aee4720c48e97df8d5.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3396 wrote to memory of 1968	3396	JaffaCakes118_b67ceb75930409aee4720c48e97df8d5.exe	84
PID 3396 wrote to memory of 1968	3396	JaffaCakes118_b67ceb75930409aee4720c48e97df8d5.exe	84
PID 3396 wrote to memory of 1968	3396	JaffaCakes118_b67ceb75930409aee4720c48e97df8d5.exe	84
PID 3396 wrote to memory of 2892	3396	JaffaCakes118_b67ceb75930409aee4720c48e97df8d5.exe	86
PID 3396 wrote to memory of 2892	3396	JaffaCakes118_b67ceb75930409aee4720c48e97df8d5.exe	86
PID 3396 wrote to memory of 2892	3396	JaffaCakes118_b67ceb75930409aee4720c48e97df8d5.exe	86
PID 3396 wrote to memory of 3456	3396	JaffaCakes118_b67ceb75930409aee4720c48e97df8d5.exe	88
PID 3396 wrote to memory of 3456	3396	JaffaCakes118_b67ceb75930409aee4720c48e97df8d5.exe	88
PID 3396 wrote to memory of 3456	3396	JaffaCakes118_b67ceb75930409aee4720c48e97df8d5.exe	88
PID 3396 wrote to memory of 4212	3396	JaffaCakes118_b67ceb75930409aee4720c48e97df8d5.exe	90
PID 3396 wrote to memory of 4212	3396	JaffaCakes118_b67ceb75930409aee4720c48e97df8d5.exe	90
PID 3396 wrote to memory of 4212	3396	JaffaCakes118_b67ceb75930409aee4720c48e97df8d5.exe	90
PID 3396 wrote to memory of 3840	3396	JaffaCakes118_b67ceb75930409aee4720c48e97df8d5.exe	92
PID 3396 wrote to memory of 3840	3396	JaffaCakes118_b67ceb75930409aee4720c48e97df8d5.exe	92
PID 3396 wrote to memory of 3840	3396	JaffaCakes118_b67ceb75930409aee4720c48e97df8d5.exe	92
PID 3396 wrote to memory of 3052	3396	JaffaCakes118_b67ceb75930409aee4720c48e97df8d5.exe	95
PID 3396 wrote to memory of 3052	3396	JaffaCakes118_b67ceb75930409aee4720c48e97df8d5.exe	95
PID 3396 wrote to memory of 3052	3396	JaffaCakes118_b67ceb75930409aee4720c48e97df8d5.exe	95
PID 2392 wrote to memory of 1668	2392	wfzewvqm.exe	111
PID 2392 wrote to memory of 1668	2392	wfzewvqm.exe	111
PID 2392 wrote to memory of 1668	2392	wfzewvqm.exe	111
PID 2392 wrote to memory of 1668	2392	wfzewvqm.exe	111
PID 2392 wrote to memory of 1668	2392	wfzewvqm.exe	111

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_b67ceb75930409aee4720c48e97df8d5.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_b67ceb75930409aee4720c48e97df8d5.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3396
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\dawelbeb\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1968
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\wfzewvqm.exe" C:\Windows\SysWOW64\dawelbeb\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2892
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create dawelbeb binPath= "C:\Windows\SysWOW64\dawelbeb\wfzewvqm.exe /d\"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_b67ceb75930409aee4720c48e97df8d5.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3456
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description dawelbeb "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4212
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start dawelbeb
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3840
- 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:3052
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3396 -s 1232
  2⤵
  - Program crash
  PID:5028

C:\Windows\SysWOW64\dawelbeb\wfzewvqm.exe
C:\Windows\SysWOW64\dawelbeb\wfzewvqm.exe /d"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_b67ceb75930409aee4720c48e97df8d5.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2392
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:1668
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2392 -s 540
  2⤵
  - Program crash
  PID:408

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 3396 -ip 3396
1⤵
PID:2948

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 2392 -ip 2392
1⤵
PID:1816

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\wfzewvqm.exe

Filesize
11.3MB

MD5
99e01bf111da3383b04cbc6f7681e860

SHA1
388e0ab2379802f52c8f86e68a47bb8ff286d628

SHA256
18f60f3be45bd35442d5609cf437a41e9ca38d67f3b19e218e82515f91f0b3aa

SHA512
9d0760eba235dadd1952cd3d8da6dd35c3242c66c39552021b2f62cbea5fd7516b24c4c9bd4d416715f429c9ba88336e3e037056771e3ec8b41dac8da26a028b

Download Submit
memory/1668-14-0x00000000001E0000-0x00000000001F5000-memory.dmp

Filesize
84KB

Download
memory/1668-17-0x00000000001E0000-0x00000000001F5000-memory.dmp

Filesize
84KB

Download
memory/1668-16-0x00000000001E0000-0x00000000001F5000-memory.dmp

Filesize
84KB

Download
memory/2392-12-0x0000000000400000-0x0000000000522000-memory.dmp

Filesize
1.1MB

Download
memory/2392-11-0x0000000000400000-0x0000000000522000-memory.dmp

Filesize
1.1MB

Download
memory/2392-13-0x0000000000400000-0x0000000000522000-memory.dmp

Filesize
1.1MB

Download
memory/2392-18-0x0000000000400000-0x0000000000522000-memory.dmp

Filesize
1.1MB

Download
memory/3396-8-0x0000000002270000-0x0000000002283000-memory.dmp

Filesize
76KB

Download
memory/3396-7-0x0000000000400000-0x0000000000522000-memory.dmp

Filesize
1.1MB

Download
memory/3396-1-0x00000000005F0000-0x00000000006F0000-memory.dmp

Filesize
1024KB

Download
memory/3396-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3396-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3396-2-0x0000000002270000-0x0000000002283000-memory.dmp

Filesize
76KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads