tofsee | 47234db90e903e55102e109e9054c59cb391c3c95f9fc34cacfe340cbac7f9df

General

Target

8cad62bca7d179852174d29df1b18d13_JaffaCakes118.exe
Size

10.0MB
MD5

8cad62bca7d179852174d29df1b18d13
SHA1

d03e726c4f0d14f76ef200fc442507a327b5005b
SHA256

47234db90e903e55102e109e9054c59cb391c3c95f9fc34cacfe340cbac7f9df
SHA512

135b2c43776bde36d81f2f140865155e4f5a6f020c511f5b38c485bd4a0e60bafd5cb4fb517abca735b764abbb13cd90cfaf9e9b5336ca7d064a9d479e90436d
SSDEEP

196608:zllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllZ:zllllllllllllllllllllllllllllllZ

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

Processes:

netsh.exe

pid process

4864 netsh.exe

pid	process
4864	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\uagefrlr\ImagePath = "C:\\Windows\\SysWOW64\\uagefrlr\\clxdnieu.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:

8cad62bca7d179852174d29df1b18d13_JaffaCakes118.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation	8cad62bca7d179852174d29df1b18d13_JaffaCakes118.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

820 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

clxdnieu.exe

pid process

1348 clxdnieu.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

clxdnieu.exe

description pid process target process

PID 1348 set thread context of 820 1348 clxdnieu.exe svchost.exe
Launches sc.exe 3 IoCs
Sc.exe is a Windows utlilty to control services on the system.

Processes:

sc.exesc.exesc.exe

pid process

4092 sc.exe
4084 sc.exe
4488 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
820	svchost.exe

pid	process
1348	clxdnieu.exe

description	pid	process	target process
PID 1348 set thread context of 820	1348	clxdnieu.exe	svchost.exe

pid	process
4092	sc.exe
4084	sc.exe
4488	sc.exe

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 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

Processes:

WerFault.exeWerFault.exe

pid pid_target process target process

548 3532 WerFault.exe 8cad62bca7d179852174d29df1b18d13_JaffaCakes118.exe
4900 1348 WerFault.exe clxdnieu.exe

pid	pid_target	process	target process
548	3532	WerFault.exe	8cad62bca7d179852174d29df1b18d13_JaffaCakes118.exe
4900	1348	WerFault.exe	clxdnieu.exe

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:

netsh.execlxdnieu.exesvchost.exesc.execmd.execmd.exesc.exesc.exe8cad62bca7d179852174d29df1b18d13_JaffaCakes118.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	clxdnieu.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.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	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	8cad62bca7d179852174d29df1b18d13_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

8cad62bca7d179852174d29df1b18d13_JaffaCakes118.execlxdnieu.exe

description	pid	process	target process
PID 3532 wrote to memory of 964	3532	8cad62bca7d179852174d29df1b18d13_JaffaCakes118.exe	cmd.exe
PID 3532 wrote to memory of 964	3532	8cad62bca7d179852174d29df1b18d13_JaffaCakes118.exe	cmd.exe
PID 3532 wrote to memory of 964	3532	8cad62bca7d179852174d29df1b18d13_JaffaCakes118.exe	cmd.exe
PID 3532 wrote to memory of 3948	3532	8cad62bca7d179852174d29df1b18d13_JaffaCakes118.exe	cmd.exe
PID 3532 wrote to memory of 3948	3532	8cad62bca7d179852174d29df1b18d13_JaffaCakes118.exe	cmd.exe
PID 3532 wrote to memory of 3948	3532	8cad62bca7d179852174d29df1b18d13_JaffaCakes118.exe	cmd.exe
PID 3532 wrote to memory of 4092	3532	8cad62bca7d179852174d29df1b18d13_JaffaCakes118.exe	sc.exe
PID 3532 wrote to memory of 4092	3532	8cad62bca7d179852174d29df1b18d13_JaffaCakes118.exe	sc.exe
PID 3532 wrote to memory of 4092	3532	8cad62bca7d179852174d29df1b18d13_JaffaCakes118.exe	sc.exe
PID 3532 wrote to memory of 4084	3532	8cad62bca7d179852174d29df1b18d13_JaffaCakes118.exe	sc.exe
PID 3532 wrote to memory of 4084	3532	8cad62bca7d179852174d29df1b18d13_JaffaCakes118.exe	sc.exe
PID 3532 wrote to memory of 4084	3532	8cad62bca7d179852174d29df1b18d13_JaffaCakes118.exe	sc.exe
PID 3532 wrote to memory of 4488	3532	8cad62bca7d179852174d29df1b18d13_JaffaCakes118.exe	sc.exe
PID 3532 wrote to memory of 4488	3532	8cad62bca7d179852174d29df1b18d13_JaffaCakes118.exe	sc.exe
PID 3532 wrote to memory of 4488	3532	8cad62bca7d179852174d29df1b18d13_JaffaCakes118.exe	sc.exe
PID 3532 wrote to memory of 4864	3532	8cad62bca7d179852174d29df1b18d13_JaffaCakes118.exe	netsh.exe
PID 3532 wrote to memory of 4864	3532	8cad62bca7d179852174d29df1b18d13_JaffaCakes118.exe	netsh.exe
PID 3532 wrote to memory of 4864	3532	8cad62bca7d179852174d29df1b18d13_JaffaCakes118.exe	netsh.exe
PID 1348 wrote to memory of 820	1348	clxdnieu.exe	svchost.exe
PID 1348 wrote to memory of 820	1348	clxdnieu.exe	svchost.exe
PID 1348 wrote to memory of 820	1348	clxdnieu.exe	svchost.exe
PID 1348 wrote to memory of 820	1348	clxdnieu.exe	svchost.exe
PID 1348 wrote to memory of 820	1348	clxdnieu.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\8cad62bca7d179852174d29df1b18d13_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\8cad62bca7d179852174d29df1b18d13_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3532
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\uagefrlr\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:964
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\clxdnieu.exe" C:\Windows\SysWOW64\uagefrlr\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3948
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create uagefrlr binPath= "C:\Windows\SysWOW64\uagefrlr\clxdnieu.exe /d\"C:\Users\Admin\AppData\Local\Temp\8cad62bca7d179852174d29df1b18d13_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4092
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description uagefrlr "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4084
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start uagefrlr
  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:4864
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3532 -s 648
  2⤵
  - Program crash
  PID:548

C:\Windows\SysWOW64\uagefrlr\clxdnieu.exe
C:\Windows\SysWOW64\uagefrlr\clxdnieu.exe /d"C:\Users\Admin\AppData\Local\Temp\8cad62bca7d179852174d29df1b18d13_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1348
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:820
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1348 -s 520
  2⤵
  - Program crash
  PID:4900

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 3532 -ip 3532
1⤵
PID:1064

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 492 -p 1348 -ip 1348
1⤵
PID:4348

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\clxdnieu.exe

Filesize
13.5MB

MD5
43edf8c690e7bee9684224c34d6e4bf9

SHA1
06aff3b0edd8fdf6408d47bd6e354e878b13956a

SHA256
425ca1d2f0e1c2513aacb9372c3784ab7f1288e66db65f2e9a0563d173c8780b

SHA512
f0ae0ec4802ae05aec2a1d3c1e39fa60d02292c4dfa5db59dfb5dcebaa73edadf2c6803b8e1d303d7d072e7e950a23d380eae80420da8d23b061d8fdc4fa8477

Download Submit
memory/820-13-0x0000000000A90000-0x0000000000AA5000-memory.dmp

Filesize
84KB

Download
memory/820-11-0x0000000000A90000-0x0000000000AA5000-memory.dmp

Filesize
84KB

Download
memory/820-14-0x0000000000A90000-0x0000000000AA5000-memory.dmp

Filesize
84KB

Download
memory/1348-15-0x0000000000400000-0x0000000002C6D000-memory.dmp

Filesize
40.4MB

Download
memory/3532-1-0x0000000002E80000-0x0000000002F80000-memory.dmp

Filesize
1024KB

Download
memory/3532-2-0x0000000002E10000-0x0000000002E23000-memory.dmp

Filesize
76KB

Download
memory/3532-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3532-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3532-9-0x0000000002E10000-0x0000000002E23000-memory.dmp

Filesize
76KB

Download
memory/3532-8-0x0000000000400000-0x0000000002C6D000-memory.dmp

Filesize
40.4MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads