tofsee | f81dd5b1bcee82dd4ef11b333409f1c70f89d31d89d326d56b315d07b901a159

General

Target

07a3f0a2281612ca878128f8d106d256_JaffaCakes118.exe
Size

13.9MB
MD5

07a3f0a2281612ca878128f8d106d256
SHA1

4603984650234bb0c9412290505069d8399d4f7b
SHA256

f81dd5b1bcee82dd4ef11b333409f1c70f89d31d89d326d56b315d07b901a159
SHA512

1fb2843b0993cdbb21bd379fb5c829f7374175d2933b2f181a9317ebfc569d8d412bcda93fac3ea3ed4c1744204b57e9df98ecb2bfc0fdb8c8f24b5bb0a07f8c
SSDEEP

98304:hjDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD:

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
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

1696 netsh.exe

pid	process
1696	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\ahlrsmew\ImagePath = "C:\\Windows\\SysWOW64\\ahlrsmew\\gsztyerz.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:

07a3f0a2281612ca878128f8d106d256_JaffaCakes118.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\Control Panel\International\Geo\Nation	07a3f0a2281612ca878128f8d106d256_JaffaCakes118.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

3984 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

gsztyerz.exe

pid process

2500 gsztyerz.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

gsztyerz.exe

description pid process target process

PID 2500 set thread context of 3984 2500 gsztyerz.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

1468 sc.exe
448 sc.exe
1792 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
3984	svchost.exe

pid	process
2500	gsztyerz.exe

description	pid	process	target process
PID 2500 set thread context of 3984	2500	gsztyerz.exe	svchost.exe

pid	process
1468	sc.exe
448	sc.exe
1792	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

3932 2800 WerFault.exe 07a3f0a2281612ca878128f8d106d256_JaffaCakes118.exe
1416 2500 WerFault.exe gsztyerz.exe

pid	pid_target	process	target process
3932	2800	WerFault.exe	07a3f0a2281612ca878128f8d106d256_JaffaCakes118.exe
1416	2500	WerFault.exe	gsztyerz.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:

07a3f0a2281612ca878128f8d106d256_JaffaCakes118.execmd.exesc.exesc.exegsztyerz.exesvchost.execmd.exesc.exenetsh.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	07a3f0a2281612ca878128f8d106d256_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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	gsztyerz.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.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

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

07a3f0a2281612ca878128f8d106d256_JaffaCakes118.exegsztyerz.exe

description	pid	process	target process
PID 2800 wrote to memory of 3060	2800	07a3f0a2281612ca878128f8d106d256_JaffaCakes118.exe	cmd.exe
PID 2800 wrote to memory of 3060	2800	07a3f0a2281612ca878128f8d106d256_JaffaCakes118.exe	cmd.exe
PID 2800 wrote to memory of 3060	2800	07a3f0a2281612ca878128f8d106d256_JaffaCakes118.exe	cmd.exe
PID 2800 wrote to memory of 4028	2800	07a3f0a2281612ca878128f8d106d256_JaffaCakes118.exe	cmd.exe
PID 2800 wrote to memory of 4028	2800	07a3f0a2281612ca878128f8d106d256_JaffaCakes118.exe	cmd.exe
PID 2800 wrote to memory of 4028	2800	07a3f0a2281612ca878128f8d106d256_JaffaCakes118.exe	cmd.exe
PID 2800 wrote to memory of 1468	2800	07a3f0a2281612ca878128f8d106d256_JaffaCakes118.exe	sc.exe
PID 2800 wrote to memory of 1468	2800	07a3f0a2281612ca878128f8d106d256_JaffaCakes118.exe	sc.exe
PID 2800 wrote to memory of 1468	2800	07a3f0a2281612ca878128f8d106d256_JaffaCakes118.exe	sc.exe
PID 2800 wrote to memory of 448	2800	07a3f0a2281612ca878128f8d106d256_JaffaCakes118.exe	sc.exe
PID 2800 wrote to memory of 448	2800	07a3f0a2281612ca878128f8d106d256_JaffaCakes118.exe	sc.exe
PID 2800 wrote to memory of 448	2800	07a3f0a2281612ca878128f8d106d256_JaffaCakes118.exe	sc.exe
PID 2800 wrote to memory of 1792	2800	07a3f0a2281612ca878128f8d106d256_JaffaCakes118.exe	sc.exe
PID 2800 wrote to memory of 1792	2800	07a3f0a2281612ca878128f8d106d256_JaffaCakes118.exe	sc.exe
PID 2800 wrote to memory of 1792	2800	07a3f0a2281612ca878128f8d106d256_JaffaCakes118.exe	sc.exe
PID 2800 wrote to memory of 1696	2800	07a3f0a2281612ca878128f8d106d256_JaffaCakes118.exe	netsh.exe
PID 2800 wrote to memory of 1696	2800	07a3f0a2281612ca878128f8d106d256_JaffaCakes118.exe	netsh.exe
PID 2800 wrote to memory of 1696	2800	07a3f0a2281612ca878128f8d106d256_JaffaCakes118.exe	netsh.exe
PID 2500 wrote to memory of 3984	2500	gsztyerz.exe	svchost.exe
PID 2500 wrote to memory of 3984	2500	gsztyerz.exe	svchost.exe
PID 2500 wrote to memory of 3984	2500	gsztyerz.exe	svchost.exe
PID 2500 wrote to memory of 3984	2500	gsztyerz.exe	svchost.exe
PID 2500 wrote to memory of 3984	2500	gsztyerz.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\07a3f0a2281612ca878128f8d106d256_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\07a3f0a2281612ca878128f8d106d256_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2800
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ahlrsmew\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3060
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\gsztyerz.exe" C:\Windows\SysWOW64\ahlrsmew\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4028
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create ahlrsmew binPath= "C:\Windows\SysWOW64\ahlrsmew\gsztyerz.exe /d\"C:\Users\Admin\AppData\Local\Temp\07a3f0a2281612ca878128f8d106d256_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1468
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description ahlrsmew "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:448
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start ahlrsmew
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1792
- 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:1696
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2800 -s 1284
  2⤵
  - Program crash
  PID:3932

C:\Windows\SysWOW64\ahlrsmew\gsztyerz.exe
C:\Windows\SysWOW64\ahlrsmew\gsztyerz.exe /d"C:\Users\Admin\AppData\Local\Temp\07a3f0a2281612ca878128f8d106d256_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2500
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:3984
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2500 -s 512
  2⤵
  - Program crash
  PID:1416

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 2800 -ip 2800
1⤵
PID:1064

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 2500 -ip 2500
1⤵
PID:2932

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\gsztyerz.exe

Filesize
11.3MB

MD5
87c1692d6c242a2c6d30948e0076d409

SHA1
b68d1629e4e12df6891822cbf6a4996aa6d36564

SHA256
433a031e142f50b69504feff17c7c7239e492c8a5b070d5d9d42361be83f213a

SHA512
e872397f2d12c13e73397ff0294ae3b354085b10b8f85a31011bbfb053be1f0410c17fde30d4c33239fbe849e6703403075dd0bb7445044f7648f1075255d9e9

Download Submit
memory/2500-11-0x0000000000400000-0x00000000004AF000-memory.dmp

Filesize
700KB

Download
memory/2500-19-0x0000000000400000-0x00000000004AF000-memory.dmp

Filesize
700KB

Download
memory/2500-13-0x0000000000400000-0x00000000004AF000-memory.dmp

Filesize
700KB

Download
memory/2500-12-0x0000000000400000-0x00000000004AF000-memory.dmp

Filesize
700KB

Download
memory/2800-8-0x0000000000400000-0x00000000004AF000-memory.dmp

Filesize
700KB

Download
memory/2800-2-0x0000000000610000-0x0000000000623000-memory.dmp

Filesize
76KB

Download
memory/2800-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2800-9-0x0000000000610000-0x0000000000623000-memory.dmp

Filesize
76KB

Download
memory/2800-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2800-1-0x0000000000670000-0x0000000000770000-memory.dmp

Filesize
1024KB

Download
memory/3984-14-0x0000000001200000-0x0000000001215000-memory.dmp

Filesize
84KB

Download
memory/3984-16-0x0000000001200000-0x0000000001215000-memory.dmp

Filesize
84KB

Download
memory/3984-17-0x0000000001200000-0x0000000001215000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads