tofsee | 0877a5f9da479c4c01f7773e9a37c88df7313447330fe2fe17f745fa496cccad

General

Target

0877a5f9da479c4c01f7773e9a37c88df7313447330fe2fe17f745fa496cccad.exe
Size

12.1MB
MD5

303f6e51c43fac701d5f42ef5bf75390
SHA1

8579db92117e98aab6ea6c8386044b9dac29f751
SHA256

0877a5f9da479c4c01f7773e9a37c88df7313447330fe2fe17f745fa496cccad
SHA512

0ef6f8304325be021264f08f7458dc7ef01c65ab8ee9b64455a27af47bbff9177648e5b6c4c2bb1d29e42205ff20987836ec32ffd23f5fd4c22bd4570e57689d
SSDEEP

6144:vZDhTWrhgUaxjFftGu35QZ+2PPFGrGuislc03r:vZDhTWrhgUWFfMuP0FGqb/0

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
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
3252	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\crwwatcb\ImagePath = "C:\\Windows\\SysWOW64\\crwwatcb\\tjjjypvn.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-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	0877a5f9da479c4c01f7773e9a37c88df7313447330fe2fe17f745fa496cccad.exe

Deletes itself 1 IoCs

pid	Process
2596	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2712	tjjjypvn.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2712 set thread context of 2596	2712	tjjjypvn.exe	98

Launches sc.exe 3 IoCs

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

pid	Process
2052	sc.exe
3384	sc.exe
5052	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
1928	2764	WerFault.exe	81
464	2712	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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tjjjypvn.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	0877a5f9da479c4c01f7773e9a37c88df7313447330fe2fe17f745fa496cccad.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.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 2764 wrote to memory of 3188	2764	0877a5f9da479c4c01f7773e9a37c88df7313447330fe2fe17f745fa496cccad.exe	82
PID 2764 wrote to memory of 3188	2764	0877a5f9da479c4c01f7773e9a37c88df7313447330fe2fe17f745fa496cccad.exe	82
PID 2764 wrote to memory of 3188	2764	0877a5f9da479c4c01f7773e9a37c88df7313447330fe2fe17f745fa496cccad.exe	82
PID 2764 wrote to memory of 4916	2764	0877a5f9da479c4c01f7773e9a37c88df7313447330fe2fe17f745fa496cccad.exe	84
PID 2764 wrote to memory of 4916	2764	0877a5f9da479c4c01f7773e9a37c88df7313447330fe2fe17f745fa496cccad.exe	84
PID 2764 wrote to memory of 4916	2764	0877a5f9da479c4c01f7773e9a37c88df7313447330fe2fe17f745fa496cccad.exe	84
PID 2764 wrote to memory of 2052	2764	0877a5f9da479c4c01f7773e9a37c88df7313447330fe2fe17f745fa496cccad.exe	86
PID 2764 wrote to memory of 2052	2764	0877a5f9da479c4c01f7773e9a37c88df7313447330fe2fe17f745fa496cccad.exe	86
PID 2764 wrote to memory of 2052	2764	0877a5f9da479c4c01f7773e9a37c88df7313447330fe2fe17f745fa496cccad.exe	86
PID 2764 wrote to memory of 3384	2764	0877a5f9da479c4c01f7773e9a37c88df7313447330fe2fe17f745fa496cccad.exe	88
PID 2764 wrote to memory of 3384	2764	0877a5f9da479c4c01f7773e9a37c88df7313447330fe2fe17f745fa496cccad.exe	88
PID 2764 wrote to memory of 3384	2764	0877a5f9da479c4c01f7773e9a37c88df7313447330fe2fe17f745fa496cccad.exe	88
PID 2764 wrote to memory of 5052	2764	0877a5f9da479c4c01f7773e9a37c88df7313447330fe2fe17f745fa496cccad.exe	90
PID 2764 wrote to memory of 5052	2764	0877a5f9da479c4c01f7773e9a37c88df7313447330fe2fe17f745fa496cccad.exe	90
PID 2764 wrote to memory of 5052	2764	0877a5f9da479c4c01f7773e9a37c88df7313447330fe2fe17f745fa496cccad.exe	90
PID 2764 wrote to memory of 3252	2764	0877a5f9da479c4c01f7773e9a37c88df7313447330fe2fe17f745fa496cccad.exe	93
PID 2764 wrote to memory of 3252	2764	0877a5f9da479c4c01f7773e9a37c88df7313447330fe2fe17f745fa496cccad.exe	93
PID 2764 wrote to memory of 3252	2764	0877a5f9da479c4c01f7773e9a37c88df7313447330fe2fe17f745fa496cccad.exe	93
PID 2712 wrote to memory of 2596	2712	tjjjypvn.exe	98
PID 2712 wrote to memory of 2596	2712	tjjjypvn.exe	98
PID 2712 wrote to memory of 2596	2712	tjjjypvn.exe	98
PID 2712 wrote to memory of 2596	2712	tjjjypvn.exe	98
PID 2712 wrote to memory of 2596	2712	tjjjypvn.exe	98

C:\Users\Admin\AppData\Local\Temp\0877a5f9da479c4c01f7773e9a37c88df7313447330fe2fe17f745fa496cccad.exe
"C:\Users\Admin\AppData\Local\Temp\0877a5f9da479c4c01f7773e9a37c88df7313447330fe2fe17f745fa496cccad.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2764
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\crwwatcb\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3188
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\tjjjypvn.exe" C:\Windows\SysWOW64\crwwatcb\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4916
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create crwwatcb binPath= "C:\Windows\SysWOW64\crwwatcb\tjjjypvn.exe /d\"C:\Users\Admin\AppData\Local\Temp\0877a5f9da479c4c01f7773e9a37c88df7313447330fe2fe17f745fa496cccad.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2052
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description crwwatcb "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3384
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start crwwatcb
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:5052
- 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:3252
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2764 -s 1176
  2⤵
  - Program crash
  PID:1928

C:\Windows\SysWOW64\crwwatcb\tjjjypvn.exe
C:\Windows\SysWOW64\crwwatcb\tjjjypvn.exe /d"C:\Users\Admin\AppData\Local\Temp\0877a5f9da479c4c01f7773e9a37c88df7313447330fe2fe17f745fa496cccad.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2712
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2596
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2712 -s 520
  2⤵
  - Program crash
  PID:464

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 2764 -ip 2764
1⤵
PID:1892

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 2712 -ip 2712
1⤵
PID:1880

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\tjjjypvn.exe

Filesize
14.7MB

MD5
f4d832c8e54dd80f4f274741d7490ed9

SHA1
535c57dd7ddb9e90212b736b7ec0cb31496a938a

SHA256
891388ab0e00d0b0326675b675abc4f298b80ad189465cf06cfbad49fa47f0f5

SHA512
0f6cd73fd15e7d3d8959238885234160bf4e55f889fd5669557fa782d737560e51a9ffb91dd115c80d2bc248ae25bdfce9df44a39e10b46145019fc052ebb20e

Download Submit
memory/2596-10-0x0000000000E20000-0x0000000000E35000-memory.dmp

Filesize
84KB

Download
memory/2596-18-0x0000000000E20000-0x0000000000E35000-memory.dmp

Filesize
84KB

Download
memory/2596-19-0x0000000000E20000-0x0000000000E35000-memory.dmp

Filesize
84KB

Download
memory/2712-8-0x0000000000400000-0x0000000000878000-memory.dmp

Filesize
4.5MB

Download
memory/2712-9-0x0000000000400000-0x0000000000878000-memory.dmp

Filesize
4.5MB

Download
memory/2712-12-0x0000000000400000-0x0000000000878000-memory.dmp

Filesize
4.5MB

Download
memory/2712-17-0x0000000000400000-0x0000000000878000-memory.dmp

Filesize
4.5MB

Download
memory/2764-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2764-2-0x00000000008D0000-0x00000000008E3000-memory.dmp

Filesize
76KB

Download
memory/2764-1-0x0000000000900000-0x0000000000A00000-memory.dmp

Filesize
1024KB

Download
memory/2764-15-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2764-14-0x00000000008D0000-0x00000000008E3000-memory.dmp

Filesize
76KB

Download
memory/2764-13-0x0000000000400000-0x0000000000878000-memory.dmp

Filesize
4.5MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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