tofsee | 2593f55632b67e0b175337f44719e487b6f79c8ef46a06f10547ae71e6c63889

General

Target

2593f55632b67e0b175337f44719e487b6f79c8ef46a06f10547ae71e6c63889.exe
Size

10.1MB
MD5

0e5a9c35b3d357763c7a52db54daf211
SHA1

65bd31bc2fc54a359e9eb1a7abb03bc71d2e7c2b
SHA256

2593f55632b67e0b175337f44719e487b6f79c8ef46a06f10547ae71e6c63889
SHA512

3ec7ba172ed8fe2e9edd0c024b92ff00a9deb619ea16cff28ff7a49eacbd0b9139c03103da2d163d1305221b5016f181dd871cebdce75bfd9fed8586486e1520
SSDEEP

49152:pkHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH/:q

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

quadoil.ru

lakeflex.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

5060 netsh.exe

pid	process
5060	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\bwvbezdw\ImagePath = "C:\\Windows\\SysWOW64\\bwvbezdw\\slzldxzm.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:

2593f55632b67e0b175337f44719e487b6f79c8ef46a06f10547ae71e6c63889.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation	2593f55632b67e0b175337f44719e487b6f79c8ef46a06f10547ae71e6c63889.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

1308 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

slzldxzm.exe

pid process

512 slzldxzm.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

slzldxzm.exe

description pid process target process

PID 512 set thread context of 1308 512 slzldxzm.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

2104 sc.exe
1596 sc.exe
4644 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
1308	svchost.exe

pid	process
512	slzldxzm.exe

description	pid	process	target process
PID 512 set thread context of 1308	512	slzldxzm.exe	svchost.exe

pid	process
2104	sc.exe
1596	sc.exe
4644	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
1792	4948	WerFault.exe	2593f55632b67e0b175337f44719e487b6f79c8ef46a06f10547ae71e6c63889.exe
4808	512	WerFault.exe	slzldxzm.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.exesvchost.exe2593f55632b67e0b175337f44719e487b6f79c8ef46a06f10547ae71e6c63889.exesc.exesc.exenetsh.exeslzldxzm.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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2593f55632b67e0b175337f44719e487b6f79c8ef46a06f10547ae71e6c63889.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	slzldxzm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

2593f55632b67e0b175337f44719e487b6f79c8ef46a06f10547ae71e6c63889.exeslzldxzm.exe

description	pid	process	target process
PID 4948 wrote to memory of 244	4948	2593f55632b67e0b175337f44719e487b6f79c8ef46a06f10547ae71e6c63889.exe	cmd.exe
PID 4948 wrote to memory of 244	4948	2593f55632b67e0b175337f44719e487b6f79c8ef46a06f10547ae71e6c63889.exe	cmd.exe
PID 4948 wrote to memory of 244	4948	2593f55632b67e0b175337f44719e487b6f79c8ef46a06f10547ae71e6c63889.exe	cmd.exe
PID 4948 wrote to memory of 2116	4948	2593f55632b67e0b175337f44719e487b6f79c8ef46a06f10547ae71e6c63889.exe	cmd.exe
PID 4948 wrote to memory of 2116	4948	2593f55632b67e0b175337f44719e487b6f79c8ef46a06f10547ae71e6c63889.exe	cmd.exe
PID 4948 wrote to memory of 2116	4948	2593f55632b67e0b175337f44719e487b6f79c8ef46a06f10547ae71e6c63889.exe	cmd.exe
PID 4948 wrote to memory of 4644	4948	2593f55632b67e0b175337f44719e487b6f79c8ef46a06f10547ae71e6c63889.exe	sc.exe
PID 4948 wrote to memory of 4644	4948	2593f55632b67e0b175337f44719e487b6f79c8ef46a06f10547ae71e6c63889.exe	sc.exe
PID 4948 wrote to memory of 4644	4948	2593f55632b67e0b175337f44719e487b6f79c8ef46a06f10547ae71e6c63889.exe	sc.exe
PID 4948 wrote to memory of 2104	4948	2593f55632b67e0b175337f44719e487b6f79c8ef46a06f10547ae71e6c63889.exe	sc.exe
PID 4948 wrote to memory of 2104	4948	2593f55632b67e0b175337f44719e487b6f79c8ef46a06f10547ae71e6c63889.exe	sc.exe
PID 4948 wrote to memory of 2104	4948	2593f55632b67e0b175337f44719e487b6f79c8ef46a06f10547ae71e6c63889.exe	sc.exe
PID 4948 wrote to memory of 1596	4948	2593f55632b67e0b175337f44719e487b6f79c8ef46a06f10547ae71e6c63889.exe	sc.exe
PID 4948 wrote to memory of 1596	4948	2593f55632b67e0b175337f44719e487b6f79c8ef46a06f10547ae71e6c63889.exe	sc.exe
PID 4948 wrote to memory of 1596	4948	2593f55632b67e0b175337f44719e487b6f79c8ef46a06f10547ae71e6c63889.exe	sc.exe
PID 4948 wrote to memory of 5060	4948	2593f55632b67e0b175337f44719e487b6f79c8ef46a06f10547ae71e6c63889.exe	netsh.exe
PID 4948 wrote to memory of 5060	4948	2593f55632b67e0b175337f44719e487b6f79c8ef46a06f10547ae71e6c63889.exe	netsh.exe
PID 4948 wrote to memory of 5060	4948	2593f55632b67e0b175337f44719e487b6f79c8ef46a06f10547ae71e6c63889.exe	netsh.exe
PID 512 wrote to memory of 1308	512	slzldxzm.exe	svchost.exe
PID 512 wrote to memory of 1308	512	slzldxzm.exe	svchost.exe
PID 512 wrote to memory of 1308	512	slzldxzm.exe	svchost.exe
PID 512 wrote to memory of 1308	512	slzldxzm.exe	svchost.exe
PID 512 wrote to memory of 1308	512	slzldxzm.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\2593f55632b67e0b175337f44719e487b6f79c8ef46a06f10547ae71e6c63889.exe
"C:\Users\Admin\AppData\Local\Temp\2593f55632b67e0b175337f44719e487b6f79c8ef46a06f10547ae71e6c63889.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4948
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\bwvbezdw\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:244
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\slzldxzm.exe" C:\Windows\SysWOW64\bwvbezdw\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2116
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create bwvbezdw binPath= "C:\Windows\SysWOW64\bwvbezdw\slzldxzm.exe /d\"C:\Users\Admin\AppData\Local\Temp\2593f55632b67e0b175337f44719e487b6f79c8ef46a06f10547ae71e6c63889.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4644
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description bwvbezdw "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2104
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start bwvbezdw
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1596
- 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:5060
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4948 -s 1216
  2⤵
  - Program crash
  PID:1792

C:\Windows\SysWOW64\bwvbezdw\slzldxzm.exe
C:\Windows\SysWOW64\bwvbezdw\slzldxzm.exe /d"C:\Users\Admin\AppData\Local\Temp\2593f55632b67e0b175337f44719e487b6f79c8ef46a06f10547ae71e6c63889.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:512
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:1308
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 512 -s 532
  2⤵
  - Program crash
  PID:4808

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 4948 -ip 4948
1⤵
PID:3328

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 512 -ip 512
1⤵
PID:4208

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\slzldxzm.exe

Filesize
11.4MB

MD5
42cbf9f2ad2669422e07870512148b61

SHA1
f8a21c28c4d4af222d342caa3382e6422ddb3d72

SHA256
ca4bd86e103dcdbb43edda7cce2d9a17b199eb70529c937dd24eaefa8a730bc6

SHA512
1626e52ccb8b1b13de41bcd0cd3f386158cab5140d2b4ef383533608dcd14cead2af620f8d84e15c7a42fbfd172482bb56a9ae840d30fd077beb74d5273e0602

Download Submit
memory/512-11-0x0000000000400000-0x0000000000785000-memory.dmp

Filesize
3.5MB

Download
memory/512-16-0x0000000000400000-0x0000000000785000-memory.dmp

Filesize
3.5MB

Download
memory/1308-12-0x00000000007C0000-0x00000000007D5000-memory.dmp

Filesize
84KB

Download
memory/1308-14-0x00000000007C0000-0x00000000007D5000-memory.dmp

Filesize
84KB

Download
memory/1308-15-0x00000000007C0000-0x00000000007D5000-memory.dmp

Filesize
84KB

Download
memory/4948-1-0x0000000000930000-0x0000000000A30000-memory.dmp

Filesize
1024KB

Download
memory/4948-2-0x00000000024D0000-0x00000000024E3000-memory.dmp

Filesize
76KB

Download
memory/4948-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4948-8-0x0000000000400000-0x0000000000785000-memory.dmp

Filesize
3.5MB

Download
memory/4948-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4948-9-0x00000000024D0000-0x00000000024E3000-memory.dmp

Filesize
76KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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