tofsee | bbe7d154232e8e07dd0aeeaadca111e11bd6814ea2c3dc1d6926b7a6f2d58693

General

Target

aaf40981d6a04afce2b036eb98670a9d_JaffaCakes118.exe
Size

11.1MB
MD5

aaf40981d6a04afce2b036eb98670a9d
SHA1

e202b436f978d78253f0287fc7d1597e4079d5b0
SHA256

bbe7d154232e8e07dd0aeeaadca111e11bd6814ea2c3dc1d6926b7a6f2d58693
SHA512

267c6496d78e0895a0afab297727b588a130493c92c9a578aedbda138562c2b009a56467fe06017f207396b9208c7c90cf6f3fe5d1f373b9e80cdf98bf39acc3
SSDEEP

3072:trLSAaIXFM9X/WWIyOEfEDQMZWecFKmZ:9NWktyH9V

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

Processes:

netsh.exe

pid	Process
4072	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\zfmumsty\ImagePath = "C:\\Windows\\SysWOW64\\zfmumsty\\cysyegyp.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:

aaf40981d6a04afce2b036eb98670a9d_JaffaCakes118.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\Control Panel\International\Geo\Nation	aaf40981d6a04afce2b036eb98670a9d_JaffaCakes118.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid	Process
2232	svchost.exe

Executes dropped EXE 1 IoCs

Processes:

cysyegyp.exe

pid	Process
3760	cysyegyp.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

cysyegyp.exe

description	pid	Process	procid_target
PID 3760 set thread context of 2232	3760	cysyegyp.exe	95

Launches sc.exe 3 IoCs

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

Processes:

sc.exesc.exesc.exe

pid	Process
2428	sc.exe
1560	sc.exe
4632	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

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

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:

cmd.exesc.exesc.exesvchost.exeaaf40981d6a04afce2b036eb98670a9d_JaffaCakes118.exesc.execysyegyp.exenetsh.execmd.exe

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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	aaf40981d6a04afce2b036eb98670a9d_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cysyegyp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

aaf40981d6a04afce2b036eb98670a9d_JaffaCakes118.execysyegyp.exe

description	pid	Process	procid_target
PID 1268 wrote to memory of 3364	1268	aaf40981d6a04afce2b036eb98670a9d_JaffaCakes118.exe	83
PID 1268 wrote to memory of 3364	1268	aaf40981d6a04afce2b036eb98670a9d_JaffaCakes118.exe	83
PID 1268 wrote to memory of 3364	1268	aaf40981d6a04afce2b036eb98670a9d_JaffaCakes118.exe	83
PID 1268 wrote to memory of 4684	1268	aaf40981d6a04afce2b036eb98670a9d_JaffaCakes118.exe	85
PID 1268 wrote to memory of 4684	1268	aaf40981d6a04afce2b036eb98670a9d_JaffaCakes118.exe	85
PID 1268 wrote to memory of 4684	1268	aaf40981d6a04afce2b036eb98670a9d_JaffaCakes118.exe	85
PID 1268 wrote to memory of 2428	1268	aaf40981d6a04afce2b036eb98670a9d_JaffaCakes118.exe	87
PID 1268 wrote to memory of 2428	1268	aaf40981d6a04afce2b036eb98670a9d_JaffaCakes118.exe	87
PID 1268 wrote to memory of 2428	1268	aaf40981d6a04afce2b036eb98670a9d_JaffaCakes118.exe	87
PID 1268 wrote to memory of 1560	1268	aaf40981d6a04afce2b036eb98670a9d_JaffaCakes118.exe	89
PID 1268 wrote to memory of 1560	1268	aaf40981d6a04afce2b036eb98670a9d_JaffaCakes118.exe	89
PID 1268 wrote to memory of 1560	1268	aaf40981d6a04afce2b036eb98670a9d_JaffaCakes118.exe	89
PID 1268 wrote to memory of 4632	1268	aaf40981d6a04afce2b036eb98670a9d_JaffaCakes118.exe	92
PID 1268 wrote to memory of 4632	1268	aaf40981d6a04afce2b036eb98670a9d_JaffaCakes118.exe	92
PID 1268 wrote to memory of 4632	1268	aaf40981d6a04afce2b036eb98670a9d_JaffaCakes118.exe	92
PID 3760 wrote to memory of 2232	3760	cysyegyp.exe	95
PID 3760 wrote to memory of 2232	3760	cysyegyp.exe	95
PID 3760 wrote to memory of 2232	3760	cysyegyp.exe	95
PID 3760 wrote to memory of 2232	3760	cysyegyp.exe	95
PID 3760 wrote to memory of 2232	3760	cysyegyp.exe	95
PID 1268 wrote to memory of 4072	1268	aaf40981d6a04afce2b036eb98670a9d_JaffaCakes118.exe	96
PID 1268 wrote to memory of 4072	1268	aaf40981d6a04afce2b036eb98670a9d_JaffaCakes118.exe	96
PID 1268 wrote to memory of 4072	1268	aaf40981d6a04afce2b036eb98670a9d_JaffaCakes118.exe	96

C:\Users\Admin\AppData\Local\Temp\aaf40981d6a04afce2b036eb98670a9d_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\aaf40981d6a04afce2b036eb98670a9d_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1268
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\zfmumsty\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3364
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\cysyegyp.exe" C:\Windows\SysWOW64\zfmumsty\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4684
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create zfmumsty binPath= "C:\Windows\SysWOW64\zfmumsty\cysyegyp.exe /d\"C:\Users\Admin\AppData\Local\Temp\aaf40981d6a04afce2b036eb98670a9d_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2428
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description zfmumsty "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1560
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start zfmumsty
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4632
- 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:4072

C:\Windows\SysWOW64\zfmumsty\cysyegyp.exe
C:\Windows\SysWOW64\zfmumsty\cysyegyp.exe /d"C:\Users\Admin\AppData\Local\Temp\aaf40981d6a04afce2b036eb98670a9d_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3760
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2232

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\cysyegyp.exe

Filesize
12.3MB

MD5
be547acf71a95dcff1458f874a7e00b3

SHA1
2740dfccb8f761a1aff114e2ef501a6ffc9c601f

SHA256
9cc6d20628f5915c5841509ebe3f763771bbb638a1da899e4084ca44323e08a0

SHA512
dbbac1abe8f98573111763a2e01f491210c603f2a51fad2b1dffeec19ca6a639c2fe7ad00ccd1e101ad6e77d823d64e09d778dd0fa5531c0b95c070a33ba465f

Download Submit
memory/1268-14-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/1268-1-0x00000000005C0000-0x00000000005C1000-memory.dmp

Filesize
4KB

Download
memory/1268-2-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/1268-0-0x00000000023D0000-0x00000000023D1000-memory.dmp

Filesize
4KB

Download
memory/2232-11-0x0000000000A10000-0x0000000000A25000-memory.dmp

Filesize
84KB

Download
memory/2232-8-0x0000000000A10000-0x0000000000A25000-memory.dmp

Filesize
84KB

Download
memory/2232-16-0x0000000000A10000-0x0000000000A25000-memory.dmp

Filesize
84KB

Download
memory/2232-17-0x0000000000A10000-0x0000000000A25000-memory.dmp

Filesize
84KB

Download
memory/2232-18-0x0000000000A10000-0x0000000000A25000-memory.dmp

Filesize
84KB

Download
memory/3760-13-0x000000005F000000-0x000000005F011000-memory.dmp

Filesize
68KB

Download
memory/3760-12-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/3760-6-0x0000000000460000-0x0000000000461000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads