tofsee | 82aa9a86e40c08cd9fb8a692485ed58cd00e737747da32b80b7cd93809ef7de5

General

Target

072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe
Size

13.6MB
MD5

b5b559ae20ec80c26ec50afd2d077f53
SHA1

4553fc5937302711ee5e74a881c7fd4acd119e5b
SHA256

072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd
SHA512

dadb525483641f1574c5efcb48cc2c1333d34145b1b7e6386afa9f3e64db7ce45bbe4fc70f2656a997ec42e839bc73cb4c641bd97061e95d712c476f5573cdfd
SSDEEP

196608:aI+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++2:a

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

pid	Process
3196	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\vpcxxztq\ImagePath = "C:\\Windows\\SysWOW64\\vpcxxztq\\xjebihhv.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-1-5-21-1302416131-1437503476-2806442725-1000\Control Panel\International\Geo\Nation	072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe

Deletes itself 1 IoCs

pid	Process
320	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4936	xjebihhv.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4936 set thread context of 320	4936	xjebihhv.exe	108

Launches sc.exe 3 IoCs

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

pid	Process
1360	sc.exe
1952	sc.exe
3924	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
4328	3596	WerFault.exe	83
1268	4936	WerFault.exe	100

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	xjebihhv.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	072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3596 wrote to memory of 4380	3596	072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe	87
PID 3596 wrote to memory of 4380	3596	072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe	87
PID 3596 wrote to memory of 4380	3596	072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe	87
PID 3596 wrote to memory of 3584	3596	072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe	89
PID 3596 wrote to memory of 3584	3596	072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe	89
PID 3596 wrote to memory of 3584	3596	072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe	89
PID 3596 wrote to memory of 1360	3596	072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe	91
PID 3596 wrote to memory of 1360	3596	072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe	91
PID 3596 wrote to memory of 1360	3596	072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe	91
PID 3596 wrote to memory of 1952	3596	072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe	96
PID 3596 wrote to memory of 1952	3596	072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe	96
PID 3596 wrote to memory of 1952	3596	072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe	96
PID 3596 wrote to memory of 3924	3596	072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe	98
PID 3596 wrote to memory of 3924	3596	072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe	98
PID 3596 wrote to memory of 3924	3596	072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe	98
PID 3596 wrote to memory of 3196	3596	072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe	103
PID 3596 wrote to memory of 3196	3596	072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe	103
PID 3596 wrote to memory of 3196	3596	072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe	103
PID 4936 wrote to memory of 320	4936	xjebihhv.exe	108
PID 4936 wrote to memory of 320	4936	xjebihhv.exe	108
PID 4936 wrote to memory of 320	4936	xjebihhv.exe	108
PID 4936 wrote to memory of 320	4936	xjebihhv.exe	108
PID 4936 wrote to memory of 320	4936	xjebihhv.exe	108

C:\Users\Admin\AppData\Local\Temp\072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe
"C:\Users\Admin\AppData\Local\Temp\072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3596
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\vpcxxztq\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4380
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\xjebihhv.exe" C:\Windows\SysWOW64\vpcxxztq\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3584
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create vpcxxztq binPath= "C:\Windows\SysWOW64\vpcxxztq\xjebihhv.exe /d\"C:\Users\Admin\AppData\Local\Temp\072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1360
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description vpcxxztq "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1952
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start vpcxxztq
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3924
- 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:3196
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3596 -s 1036
  2⤵
  - Program crash
  PID:4328

C:\Windows\SysWOW64\vpcxxztq\xjebihhv.exe
C:\Windows\SysWOW64\vpcxxztq\xjebihhv.exe /d"C:\Users\Admin\AppData\Local\Temp\072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4936
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:320
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4936 -s 520
  2⤵
  - Program crash
  PID:1268

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 3596 -ip 3596
1⤵
PID:4704

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 4936 -ip 4936
1⤵
PID:2744

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\xjebihhv.exe

Filesize
12.0MB

MD5
9aee3b4559a4a03f867d873daeb87a25

SHA1
bac5baef97ed5311e9fe0b03aeafbfcff03a650b

SHA256
41a6322c98cebaec0772c722c4c6bf581b730563faa14f5317f612d721d94b9f

SHA512
78844cedbfef9238711e59852d99c1b18b58c12fc1395c9c0140996f91e22ea2407f66de1610d1a480171851ca552c5d3aee6017e5573e644fe39dd2e66d52d9

Download Submit
memory/320-11-0x0000000000190000-0x00000000001A5000-memory.dmp

Filesize
84KB

Download
memory/320-14-0x0000000000190000-0x00000000001A5000-memory.dmp

Filesize
84KB

Download
memory/320-17-0x0000000000190000-0x00000000001A5000-memory.dmp

Filesize
84KB

Download
memory/3596-1-0x0000000000AF0000-0x0000000000BF0000-memory.dmp

Filesize
1024KB

Download
memory/3596-2-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download
memory/3596-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3596-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3596-8-0x0000000000400000-0x0000000000870000-memory.dmp

Filesize
4.4MB

Download
memory/3596-9-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download
memory/4936-12-0x0000000000400000-0x0000000000870000-memory.dmp

Filesize
4.4MB

Download
memory/4936-15-0x0000000000400000-0x0000000000870000-memory.dmp

Filesize
4.4MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads