tofsee | a5c89dbcfcc30b80354c001e087b061544c1e1f64a40e2b02935a4a1e9138252

General

Target

b598c70600e96cd21f5ee80cac5041b1_JaffaCakes118.exe
Size

14.3MB
MD5

b598c70600e96cd21f5ee80cac5041b1
SHA1

b5054afd240d38b4a452fbc3da6c11c99cb47aac
SHA256

a5c89dbcfcc30b80354c001e087b061544c1e1f64a40e2b02935a4a1e9138252
SHA512

4bf972d79628153e5b4f37d2979caa60cbb4d6093ce9979ccadfc468b466c797dcaa9cff3e2839e48419fe224de14f2c18b88602f3f89d47e5cd68f00edd8db2
SSDEEP

196608:jXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXH:

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

43.231.4.6

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
1268	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\jawhlbfz\ImagePath = "C:\\Windows\\SysWOW64\\jawhlbfz\\mzydnyei.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	b598c70600e96cd21f5ee80cac5041b1_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
4952	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4200	mzydnyei.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4200 set thread context of 4952	4200	mzydnyei.exe	102

Launches sc.exe 3 IoCs

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

pid	Process
3896	sc.exe
2784	sc.exe
4940	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
4288	1492	WerFault.exe	81
2088	4200	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	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mzydnyei.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b598c70600e96cd21f5ee80cac5041b1_JaffaCakes118.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	svchost.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1492 wrote to memory of 664	1492	b598c70600e96cd21f5ee80cac5041b1_JaffaCakes118.exe	82
PID 1492 wrote to memory of 664	1492	b598c70600e96cd21f5ee80cac5041b1_JaffaCakes118.exe	82
PID 1492 wrote to memory of 664	1492	b598c70600e96cd21f5ee80cac5041b1_JaffaCakes118.exe	82
PID 1492 wrote to memory of 3616	1492	b598c70600e96cd21f5ee80cac5041b1_JaffaCakes118.exe	84
PID 1492 wrote to memory of 3616	1492	b598c70600e96cd21f5ee80cac5041b1_JaffaCakes118.exe	84
PID 1492 wrote to memory of 3616	1492	b598c70600e96cd21f5ee80cac5041b1_JaffaCakes118.exe	84
PID 1492 wrote to memory of 3896	1492	b598c70600e96cd21f5ee80cac5041b1_JaffaCakes118.exe	86
PID 1492 wrote to memory of 3896	1492	b598c70600e96cd21f5ee80cac5041b1_JaffaCakes118.exe	86
PID 1492 wrote to memory of 3896	1492	b598c70600e96cd21f5ee80cac5041b1_JaffaCakes118.exe	86
PID 1492 wrote to memory of 2784	1492	b598c70600e96cd21f5ee80cac5041b1_JaffaCakes118.exe	88
PID 1492 wrote to memory of 2784	1492	b598c70600e96cd21f5ee80cac5041b1_JaffaCakes118.exe	88
PID 1492 wrote to memory of 2784	1492	b598c70600e96cd21f5ee80cac5041b1_JaffaCakes118.exe	88
PID 1492 wrote to memory of 4940	1492	b598c70600e96cd21f5ee80cac5041b1_JaffaCakes118.exe	90
PID 1492 wrote to memory of 4940	1492	b598c70600e96cd21f5ee80cac5041b1_JaffaCakes118.exe	90
PID 1492 wrote to memory of 4940	1492	b598c70600e96cd21f5ee80cac5041b1_JaffaCakes118.exe	90
PID 1492 wrote to memory of 1268	1492	b598c70600e96cd21f5ee80cac5041b1_JaffaCakes118.exe	93
PID 1492 wrote to memory of 1268	1492	b598c70600e96cd21f5ee80cac5041b1_JaffaCakes118.exe	93
PID 1492 wrote to memory of 1268	1492	b598c70600e96cd21f5ee80cac5041b1_JaffaCakes118.exe	93
PID 4200 wrote to memory of 4952	4200	mzydnyei.exe	102
PID 4200 wrote to memory of 4952	4200	mzydnyei.exe	102
PID 4200 wrote to memory of 4952	4200	mzydnyei.exe	102
PID 4200 wrote to memory of 4952	4200	mzydnyei.exe	102
PID 4200 wrote to memory of 4952	4200	mzydnyei.exe	102

C:\Users\Admin\AppData\Local\Temp\b598c70600e96cd21f5ee80cac5041b1_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\b598c70600e96cd21f5ee80cac5041b1_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1492
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\jawhlbfz\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:664
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\mzydnyei.exe" C:\Windows\SysWOW64\jawhlbfz\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3616
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create jawhlbfz binPath= "C:\Windows\SysWOW64\jawhlbfz\mzydnyei.exe /d\"C:\Users\Admin\AppData\Local\Temp\b598c70600e96cd21f5ee80cac5041b1_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3896
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description jawhlbfz "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2784
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start jawhlbfz
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4940
- 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:1268
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1492 -s 1036
  2⤵
  - Program crash
  PID:4288

C:\Windows\SysWOW64\jawhlbfz\mzydnyei.exe
C:\Windows\SysWOW64\jawhlbfz\mzydnyei.exe /d"C:\Users\Admin\AppData\Local\Temp\b598c70600e96cd21f5ee80cac5041b1_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4200
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:4952
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4200 -s 508
  2⤵
  - Program crash
  PID:2088

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 1492 -ip 1492
1⤵
PID:4872

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 4200 -ip 4200
1⤵
PID:4656

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\mzydnyei.exe

Filesize
11.1MB

MD5
8d3082ef2690c538e26d27d446608657

SHA1
43c1886bb3ccc0a020d0bba3ef7cfc531ee2d1f9

SHA256
2c2bb83306cf771e56f80d323dbf2d2fbe95efb8fd366dc0e941cafb29153520

SHA512
4437abb962574e2e715a3188af44ef95abdea0b9706925427cac09c6a5dec27a462552036d8b352a6df9065633980ebd11932c6c475d72c8edc8fb726b4341ea

Download Submit
memory/1492-2-0x0000000000B90000-0x0000000000BA3000-memory.dmp

Filesize
76KB

Download
memory/1492-1-0x0000000000BF0000-0x0000000000CF0000-memory.dmp

Filesize
1024KB

Download
memory/1492-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1492-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1492-7-0x0000000000400000-0x00000000008EA000-memory.dmp

Filesize
4.9MB

Download
memory/1492-8-0x0000000000B90000-0x0000000000BA3000-memory.dmp

Filesize
76KB

Download
memory/4200-15-0x0000000000400000-0x00000000008EA000-memory.dmp

Filesize
4.9MB

Download
memory/4952-11-0x0000000000910000-0x0000000000925000-memory.dmp

Filesize
84KB

Download
memory/4952-13-0x0000000000910000-0x0000000000925000-memory.dmp

Filesize
84KB

Download
memory/4952-14-0x0000000000910000-0x0000000000925000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads