tofsee | 60e01eabbc05e7a80be2f23ad0902b0598f433ac3bfd06e0371429893ceb57ea

General

Target

JaffaCakes118_4ed52beb87115613314a21d52638e6fb.exe
Size

13.2MB
MD5

4ed52beb87115613314a21d52638e6fb
SHA1

f85427d24582cf1a66606d171f6718d93b141546
SHA256

60e01eabbc05e7a80be2f23ad0902b0598f433ac3bfd06e0371429893ceb57ea
SHA512

fcd09c63032cba0d290ebef76830f095e84ccb4671dd53e4423cfcbba1fe0945e00f91b00c68b135591768937c520e71acad14dc3a06492de0208c17dd9b0db9
SSDEEP

49152:MIc6CLNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN3:1c6C

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
3756	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\evmgborz\ImagePath = "C:\\Windows\\SysWOW64\\evmgborz\\yyzkfgem.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-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	JaffaCakes118_4ed52beb87115613314a21d52638e6fb.exe

Deletes itself 1 IoCs

pid	Process
4924	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2404	yyzkfgem.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2404 set thread context of 4924	2404	yyzkfgem.exe	98

Launches sc.exe 3 IoCs

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

pid	Process
3956	sc.exe
4948	sc.exe
2324	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
1436	3908	WerFault.exe	81
5112	2404	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	yyzkfgem.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_4ed52beb87115613314a21d52638e6fb.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
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	svchost.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3908 wrote to memory of 468	3908	JaffaCakes118_4ed52beb87115613314a21d52638e6fb.exe	82
PID 3908 wrote to memory of 468	3908	JaffaCakes118_4ed52beb87115613314a21d52638e6fb.exe	82
PID 3908 wrote to memory of 468	3908	JaffaCakes118_4ed52beb87115613314a21d52638e6fb.exe	82
PID 3908 wrote to memory of 5092	3908	JaffaCakes118_4ed52beb87115613314a21d52638e6fb.exe	84
PID 3908 wrote to memory of 5092	3908	JaffaCakes118_4ed52beb87115613314a21d52638e6fb.exe	84
PID 3908 wrote to memory of 5092	3908	JaffaCakes118_4ed52beb87115613314a21d52638e6fb.exe	84
PID 3908 wrote to memory of 2324	3908	JaffaCakes118_4ed52beb87115613314a21d52638e6fb.exe	86
PID 3908 wrote to memory of 2324	3908	JaffaCakes118_4ed52beb87115613314a21d52638e6fb.exe	86
PID 3908 wrote to memory of 2324	3908	JaffaCakes118_4ed52beb87115613314a21d52638e6fb.exe	86
PID 3908 wrote to memory of 3956	3908	JaffaCakes118_4ed52beb87115613314a21d52638e6fb.exe	88
PID 3908 wrote to memory of 3956	3908	JaffaCakes118_4ed52beb87115613314a21d52638e6fb.exe	88
PID 3908 wrote to memory of 3956	3908	JaffaCakes118_4ed52beb87115613314a21d52638e6fb.exe	88
PID 3908 wrote to memory of 4948	3908	JaffaCakes118_4ed52beb87115613314a21d52638e6fb.exe	90
PID 3908 wrote to memory of 4948	3908	JaffaCakes118_4ed52beb87115613314a21d52638e6fb.exe	90
PID 3908 wrote to memory of 4948	3908	JaffaCakes118_4ed52beb87115613314a21d52638e6fb.exe	90
PID 3908 wrote to memory of 3756	3908	JaffaCakes118_4ed52beb87115613314a21d52638e6fb.exe	93
PID 3908 wrote to memory of 3756	3908	JaffaCakes118_4ed52beb87115613314a21d52638e6fb.exe	93
PID 3908 wrote to memory of 3756	3908	JaffaCakes118_4ed52beb87115613314a21d52638e6fb.exe	93
PID 2404 wrote to memory of 4924	2404	yyzkfgem.exe	98
PID 2404 wrote to memory of 4924	2404	yyzkfgem.exe	98
PID 2404 wrote to memory of 4924	2404	yyzkfgem.exe	98
PID 2404 wrote to memory of 4924	2404	yyzkfgem.exe	98
PID 2404 wrote to memory of 4924	2404	yyzkfgem.exe	98

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_4ed52beb87115613314a21d52638e6fb.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_4ed52beb87115613314a21d52638e6fb.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3908
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\evmgborz\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:468
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\yyzkfgem.exe" C:\Windows\SysWOW64\evmgborz\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:5092
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create evmgborz binPath= "C:\Windows\SysWOW64\evmgborz\yyzkfgem.exe /d\"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_4ed52beb87115613314a21d52638e6fb.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2324
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description evmgborz "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3956
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start evmgborz
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4948
- 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:3756
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3908 -s 1040
  2⤵
  - Program crash
  PID:1436

C:\Windows\SysWOW64\evmgborz\yyzkfgem.exe
C:\Windows\SysWOW64\evmgborz\yyzkfgem.exe /d"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_4ed52beb87115613314a21d52638e6fb.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2404
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:4924
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2404 -s 560
  2⤵
  - Program crash
  PID:5112

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 3908 -ip 3908
1⤵
PID:5100

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 540 -p 2404 -ip 2404
1⤵
PID:4972

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\yyzkfgem.exe

Filesize
14.6MB

MD5
7d75c553ef1b95247c5ec2c44f1f667f

SHA1
0e77106c329fb39f8cbe5b085935d4416aaad9f8

SHA256
8b5d458b4d76d0c102723399c709acc29f6a05e2781e6808743877df9dd71e55

SHA512
29f539ac1e71286f1b069e7b07460be6c8dadfd05ee190f7d6c08ee81d1a5deb3985965dea8dd814a065a26f5c821e576560296a10fdf4cb4013a864a3814191

Download Submit
memory/2404-15-0x0000000000400000-0x0000000002BAB000-memory.dmp

Filesize
39.7MB

Download
memory/3908-2-0x0000000002BE0000-0x0000000002BF3000-memory.dmp

Filesize
76KB

Download
memory/3908-1-0x0000000002CA0000-0x0000000002DA0000-memory.dmp

Filesize
1024KB

Download
memory/3908-4-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3908-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3908-9-0x0000000002BE0000-0x0000000002BF3000-memory.dmp

Filesize
76KB

Download
memory/3908-8-0x0000000000400000-0x0000000002BAB000-memory.dmp

Filesize
39.7MB

Download
memory/4924-11-0x0000000000AB0000-0x0000000000AC5000-memory.dmp

Filesize
84KB

Download
memory/4924-13-0x0000000000AB0000-0x0000000000AC5000-memory.dmp

Filesize
84KB

Download
memory/4924-14-0x0000000000AB0000-0x0000000000AC5000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads