tofsee | e41c46054bd2c722b8d649b57021da9320cf6d2e19e04186d946af560059a1ad

General

Target

JaffaCakes118_b541829aa66c437b2a62789d3aca5e86.exe
Size

11.1MB
MD5

b541829aa66c437b2a62789d3aca5e86
SHA1

80f5a87ae6246fdc2794d481d550db3d363e52a7
SHA256

e41c46054bd2c722b8d649b57021da9320cf6d2e19e04186d946af560059a1ad
SHA512

7f49782bbe131565325698a0584324c3e5f282d5182a817b2dabbb87c038639e2809bf58e54795fa6d746fb5247fcb5bd7639f2a3f92841b030447e75caa1279
SSDEEP

12288:izZd0++++++++++++++++++++++++++++++++++++++++++++++++++++++++++G:izZ

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
1988	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\rakzhkbp\ImagePath = "C:\\Windows\\SysWOW64\\rakzhkbp\\cbprfcdv.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-1-5-21-2045521122-590294423-3465680274-1000\Control Panel\International\Geo\Nation	JaffaCakes118_b541829aa66c437b2a62789d3aca5e86.exe

Deletes itself 1 IoCs

pid	Process
2072	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
556	cbprfcdv.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 556 set thread context of 2072	556	cbprfcdv.exe	95

Launches sc.exe 3 IoCs

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

pid	Process
4792	sc.exe
232	sc.exe
4272	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
264	3420	WerFault.exe	82
4932	556	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	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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_b541829aa66c437b2a62789d3aca5e86.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	cbprfcdv.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3420 wrote to memory of 4868	3420	JaffaCakes118_b541829aa66c437b2a62789d3aca5e86.exe	83
PID 3420 wrote to memory of 4868	3420	JaffaCakes118_b541829aa66c437b2a62789d3aca5e86.exe	83
PID 3420 wrote to memory of 4868	3420	JaffaCakes118_b541829aa66c437b2a62789d3aca5e86.exe	83
PID 3420 wrote to memory of 3384	3420	JaffaCakes118_b541829aa66c437b2a62789d3aca5e86.exe	85
PID 3420 wrote to memory of 3384	3420	JaffaCakes118_b541829aa66c437b2a62789d3aca5e86.exe	85
PID 3420 wrote to memory of 3384	3420	JaffaCakes118_b541829aa66c437b2a62789d3aca5e86.exe	85
PID 3420 wrote to memory of 4792	3420	JaffaCakes118_b541829aa66c437b2a62789d3aca5e86.exe	87
PID 3420 wrote to memory of 4792	3420	JaffaCakes118_b541829aa66c437b2a62789d3aca5e86.exe	87
PID 3420 wrote to memory of 4792	3420	JaffaCakes118_b541829aa66c437b2a62789d3aca5e86.exe	87
PID 3420 wrote to memory of 232	3420	JaffaCakes118_b541829aa66c437b2a62789d3aca5e86.exe	89
PID 3420 wrote to memory of 232	3420	JaffaCakes118_b541829aa66c437b2a62789d3aca5e86.exe	89
PID 3420 wrote to memory of 232	3420	JaffaCakes118_b541829aa66c437b2a62789d3aca5e86.exe	89
PID 3420 wrote to memory of 4272	3420	JaffaCakes118_b541829aa66c437b2a62789d3aca5e86.exe	92
PID 3420 wrote to memory of 4272	3420	JaffaCakes118_b541829aa66c437b2a62789d3aca5e86.exe	92
PID 3420 wrote to memory of 4272	3420	JaffaCakes118_b541829aa66c437b2a62789d3aca5e86.exe	92
PID 556 wrote to memory of 2072	556	cbprfcdv.exe	95
PID 556 wrote to memory of 2072	556	cbprfcdv.exe	95
PID 556 wrote to memory of 2072	556	cbprfcdv.exe	95
PID 556 wrote to memory of 2072	556	cbprfcdv.exe	95
PID 556 wrote to memory of 2072	556	cbprfcdv.exe	95
PID 3420 wrote to memory of 1988	3420	JaffaCakes118_b541829aa66c437b2a62789d3aca5e86.exe	98
PID 3420 wrote to memory of 1988	3420	JaffaCakes118_b541829aa66c437b2a62789d3aca5e86.exe	98
PID 3420 wrote to memory of 1988	3420	JaffaCakes118_b541829aa66c437b2a62789d3aca5e86.exe	98

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_b541829aa66c437b2a62789d3aca5e86.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_b541829aa66c437b2a62789d3aca5e86.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3420
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\rakzhkbp\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4868
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\cbprfcdv.exe" C:\Windows\SysWOW64\rakzhkbp\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3384
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create rakzhkbp binPath= "C:\Windows\SysWOW64\rakzhkbp\cbprfcdv.exe /d\"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_b541829aa66c437b2a62789d3aca5e86.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4792
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description rakzhkbp "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:232
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start rakzhkbp
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4272
- 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:1988
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3420 -s 672
  2⤵
  - Program crash
  PID:264

C:\Windows\SysWOW64\rakzhkbp\cbprfcdv.exe
C:\Windows\SysWOW64\rakzhkbp\cbprfcdv.exe /d"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_b541829aa66c437b2a62789d3aca5e86.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:556
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2072
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 556 -s 556
  2⤵
  - Program crash
  PID:4932

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 3420 -ip 3420
1⤵
PID:2544

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 556 -ip 556
1⤵
PID:1996

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\cbprfcdv.exe

Filesize
13.4MB

MD5
242ca68f0df366a15611a7a57a4cfc9c

SHA1
d5745ad6dc34dec7954bd5816e7beef93621ab9c

SHA256
1d280e0f371ee0aef687704422bcae4e07d5acab879dda9eb4334abcfc89774c

SHA512
67fb059500bbbd4717d1281be8354892679291d27b493f85dd3854b7aa77886c5612065e3b185fdca7b10f5fff4f266549befd24eeae564cbd52c15988499922

Download Submit
memory/556-10-0x0000000000400000-0x0000000002DAC000-memory.dmp

Filesize
41.7MB

Download
memory/2072-8-0x0000000000F40000-0x0000000000F55000-memory.dmp

Filesize
84KB

Download
memory/2072-14-0x0000000000F40000-0x0000000000F55000-memory.dmp

Filesize
84KB

Download
memory/2072-15-0x0000000000F40000-0x0000000000F55000-memory.dmp

Filesize
84KB

Download
memory/3420-1-0x0000000002F30000-0x0000000003030000-memory.dmp

Filesize
1024KB

Download
memory/3420-2-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download
memory/3420-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3420-13-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3420-12-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download
memory/3420-11-0x0000000000400000-0x0000000002DAC000-memory.dmp

Filesize
41.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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