tofsee | c427b8b15e5dca67b4b7c9fec0e4a7a461532bec32d38f47fba213c905ab731e

General

Target

475dc421b8cf3050201ecf759cc19844.exe
Size

11.9MB
MD5

475dc421b8cf3050201ecf759cc19844
SHA1

eef39480edb6de6651af025696ee8f6cfcc9d250
SHA256

c427b8b15e5dca67b4b7c9fec0e4a7a461532bec32d38f47fba213c905ab731e
SHA512

69c7a9cd274167984c38fa917c0d7c97ef914330dd67f2e2f0797fb65919525567de46791d4f0cfffebbdd3f2bdb2767827fec6e5f49e800f0fa8ffde8f08065
SSDEEP

49152:fyjfVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVV9:

Score

10^/10

tofsee evasion persistence 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
Creates new service(s) 1 TTPs
persistence

Windows Service
T1543.003

Modifies Windows Firewall 1 TTPs 1 IoCs

evasion

Windows Service

T1543.003

pid	Process
2424	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\jcwmxcmy\ImagePath = "C:\\Windows\\SysWOW64\\jcwmxcmy\\fhciboy.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-1-5-21-1815711207-1844170477-3539718864-1000\Control Panel\International\Geo\Nation	475dc421b8cf3050201ecf759cc19844.exe

Executes dropped EXE 1 IoCs

pid	Process
1376	fhciboy.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1376 set thread context of 4192	1376	fhciboy.exe	106

Launches sc.exe 3 IoCs

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

pid	Process
1580	sc.exe
568	sc.exe
956	sc.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 2 IoCs

pid	pid_target	Process	procid_target
2264	5008	WerFault.exe	90
3184	1376	WerFault.exe	102

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 5008 wrote to memory of 64	5008	475dc421b8cf3050201ecf759cc19844.exe	92
PID 5008 wrote to memory of 64	5008	475dc421b8cf3050201ecf759cc19844.exe	92
PID 5008 wrote to memory of 64	5008	475dc421b8cf3050201ecf759cc19844.exe	92
PID 5008 wrote to memory of 4100	5008	475dc421b8cf3050201ecf759cc19844.exe	94
PID 5008 wrote to memory of 4100	5008	475dc421b8cf3050201ecf759cc19844.exe	94
PID 5008 wrote to memory of 4100	5008	475dc421b8cf3050201ecf759cc19844.exe	94
PID 5008 wrote to memory of 1580	5008	475dc421b8cf3050201ecf759cc19844.exe	96
PID 5008 wrote to memory of 1580	5008	475dc421b8cf3050201ecf759cc19844.exe	96
PID 5008 wrote to memory of 1580	5008	475dc421b8cf3050201ecf759cc19844.exe	96
PID 5008 wrote to memory of 568	5008	475dc421b8cf3050201ecf759cc19844.exe	99
PID 5008 wrote to memory of 568	5008	475dc421b8cf3050201ecf759cc19844.exe	99
PID 5008 wrote to memory of 568	5008	475dc421b8cf3050201ecf759cc19844.exe	99
PID 5008 wrote to memory of 956	5008	475dc421b8cf3050201ecf759cc19844.exe	101
PID 5008 wrote to memory of 956	5008	475dc421b8cf3050201ecf759cc19844.exe	101
PID 5008 wrote to memory of 956	5008	475dc421b8cf3050201ecf759cc19844.exe	101
PID 5008 wrote to memory of 2424	5008	475dc421b8cf3050201ecf759cc19844.exe	108
PID 5008 wrote to memory of 2424	5008	475dc421b8cf3050201ecf759cc19844.exe	108
PID 5008 wrote to memory of 2424	5008	475dc421b8cf3050201ecf759cc19844.exe	108
PID 1376 wrote to memory of 4192	1376	fhciboy.exe	106
PID 1376 wrote to memory of 4192	1376	fhciboy.exe	106
PID 1376 wrote to memory of 4192	1376	fhciboy.exe	106
PID 1376 wrote to memory of 4192	1376	fhciboy.exe	106
PID 1376 wrote to memory of 4192	1376	fhciboy.exe	106

C:\Users\Admin\AppData\Local\Temp\475dc421b8cf3050201ecf759cc19844.exe
"C:\Users\Admin\AppData\Local\Temp\475dc421b8cf3050201ecf759cc19844.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5008
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\jcwmxcmy\
  2⤵
  PID:64
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\fhciboy.exe" C:\Windows\SysWOW64\jcwmxcmy\
  2⤵
  PID:4100
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create jcwmxcmy binPath= "C:\Windows\SysWOW64\jcwmxcmy\fhciboy.exe /d\"C:\Users\Admin\AppData\Local\Temp\475dc421b8cf3050201ecf759cc19844.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:1580
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description jcwmxcmy "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:568
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start jcwmxcmy
  2⤵
  - Launches sc.exe
  PID:956
- 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
  PID:2424
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5008 -s 1204
  2⤵
  - Program crash
  PID:2264

C:\Windows\SysWOW64\jcwmxcmy\fhciboy.exe
C:\Windows\SysWOW64\jcwmxcmy\fhciboy.exe /d"C:\Users\Admin\AppData\Local\Temp\475dc421b8cf3050201ecf759cc19844.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1376
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  PID:4192
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1376 -s 520
  2⤵
  - Program crash
  PID:3184

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 496 -p 1376 -ip 1376
1⤵
PID:4868

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 5008 -ip 5008
1⤵
PID:4836

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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

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

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1376-13-0x0000000000D60000-0x0000000000D73000-memory.dmp

Filesize
76KB

Download
memory/1376-17-0x0000000000400000-0x0000000000C18000-memory.dmp

Filesize
8.1MB

Download
memory/1376-8-0x0000000000F50000-0x0000000001050000-memory.dmp

Filesize
1024KB

Download
memory/1376-11-0x0000000000400000-0x0000000000C18000-memory.dmp

Filesize
8.1MB

Download
memory/4192-9-0x0000000001210000-0x0000000001225000-memory.dmp

Filesize
84KB

Download
memory/4192-14-0x0000000001210000-0x0000000001225000-memory.dmp

Filesize
84KB

Download
memory/4192-18-0x0000000001210000-0x0000000001225000-memory.dmp

Filesize
84KB

Download
memory/4192-21-0x0000000001210000-0x0000000001225000-memory.dmp

Filesize
84KB

Download
memory/4192-22-0x0000000001210000-0x0000000001225000-memory.dmp

Filesize
84KB

Download
memory/5008-1-0x0000000000FE0000-0x00000000010E0000-memory.dmp

Filesize
1024KB

Download
memory/5008-4-0x0000000000400000-0x0000000000C18000-memory.dmp

Filesize
8.1MB

Download
memory/5008-16-0x0000000000FE0000-0x00000000010E0000-memory.dmp

Filesize
1024KB

Download
memory/5008-15-0x0000000000400000-0x0000000000C18000-memory.dmp

Filesize
8.1MB

Download
memory/5008-2-0x0000000000D70000-0x0000000000D83000-memory.dmp

Filesize
76KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads