tofsee | ae94bcdff4c4db9cd6aaa662d87f6b3bc9b1de7a786156307c42aad4f4d72334

General

Target
ae94bcdff4c4db9cd6aaa662d87f6b3bc9b1de7a786156307c42aad4f4d72334.exe
Size 10.6MB
Sample240510-ev4f3sdg48
SHA256 ae94bcdff4c4db9cd6aaa662d87f6b3bc9b1de7a786156307c42aad4f4d72334
MD5 48d331a22042af3c46f4a5c5852fd973
SHA1 144c9fbab74bfa069d42f895d84cd0573d5e5582
SHA512 64d36047c7e0d92054eac6b44eae05ada08e7fb5febbb5a2ae6b7a07ebdc9bd31ebd0391b490957362d1c3727986591bdcb0598111967c4b94e1b895f8b71026
SSDEEP 6144:CKNDMp7tMWhHwXO3kyvzC0+9XFWYW///////////////////////////////////:CKNDMpOmHKcRv+0u
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

tofsee evasion execution persistence 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
3132	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\ybehcufl\ImagePath = "C:\\Windows\\SysWOW64\\ybehcufl\\audnadiu.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-1-5-21-1162180587-977231257-2194346871-1000\Control Panel\International\Geo\Nation	ae94bcdff4c4db9cd6aaa662d87f6b3bc9b1de7a786156307c42aad4f4d72334.exe

Deletes itself 1 IoCs

pid	Process
5480	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4392	audnadiu.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4392 set thread context of 5480	4392	audnadiu.exe	106

Launches sc.exe 3 IoCs

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

pid	Process
2756	sc.exe
4672	sc.exe
1424	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
5596	2860	WerFault.exe	81
3664	4392	WerFault.exe	98

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2860 wrote to memory of 1904	2860	ae94bcdff4c4db9cd6aaa662d87f6b3bc9b1de7a786156307c42aad4f4d72334.exe	85
PID 2860 wrote to memory of 1904	2860	ae94bcdff4c4db9cd6aaa662d87f6b3bc9b1de7a786156307c42aad4f4d72334.exe	85
PID 2860 wrote to memory of 1904	2860	ae94bcdff4c4db9cd6aaa662d87f6b3bc9b1de7a786156307c42aad4f4d72334.exe	85
PID 2860 wrote to memory of 5748	2860	ae94bcdff4c4db9cd6aaa662d87f6b3bc9b1de7a786156307c42aad4f4d72334.exe	87
PID 2860 wrote to memory of 5748	2860	ae94bcdff4c4db9cd6aaa662d87f6b3bc9b1de7a786156307c42aad4f4d72334.exe	87
PID 2860 wrote to memory of 5748	2860	ae94bcdff4c4db9cd6aaa662d87f6b3bc9b1de7a786156307c42aad4f4d72334.exe	87
PID 2860 wrote to memory of 2756	2860	ae94bcdff4c4db9cd6aaa662d87f6b3bc9b1de7a786156307c42aad4f4d72334.exe	89
PID 2860 wrote to memory of 2756	2860	ae94bcdff4c4db9cd6aaa662d87f6b3bc9b1de7a786156307c42aad4f4d72334.exe	89
PID 2860 wrote to memory of 2756	2860	ae94bcdff4c4db9cd6aaa662d87f6b3bc9b1de7a786156307c42aad4f4d72334.exe	89
PID 2860 wrote to memory of 4672	2860	ae94bcdff4c4db9cd6aaa662d87f6b3bc9b1de7a786156307c42aad4f4d72334.exe	91
PID 2860 wrote to memory of 4672	2860	ae94bcdff4c4db9cd6aaa662d87f6b3bc9b1de7a786156307c42aad4f4d72334.exe	91
PID 2860 wrote to memory of 4672	2860	ae94bcdff4c4db9cd6aaa662d87f6b3bc9b1de7a786156307c42aad4f4d72334.exe	91
PID 2860 wrote to memory of 1424	2860	ae94bcdff4c4db9cd6aaa662d87f6b3bc9b1de7a786156307c42aad4f4d72334.exe	96
PID 2860 wrote to memory of 1424	2860	ae94bcdff4c4db9cd6aaa662d87f6b3bc9b1de7a786156307c42aad4f4d72334.exe	96
PID 2860 wrote to memory of 1424	2860	ae94bcdff4c4db9cd6aaa662d87f6b3bc9b1de7a786156307c42aad4f4d72334.exe	96
PID 2860 wrote to memory of 3132	2860	ae94bcdff4c4db9cd6aaa662d87f6b3bc9b1de7a786156307c42aad4f4d72334.exe	100
PID 2860 wrote to memory of 3132	2860	ae94bcdff4c4db9cd6aaa662d87f6b3bc9b1de7a786156307c42aad4f4d72334.exe	100
PID 2860 wrote to memory of 3132	2860	ae94bcdff4c4db9cd6aaa662d87f6b3bc9b1de7a786156307c42aad4f4d72334.exe	100
PID 4392 wrote to memory of 5480	4392	audnadiu.exe	106
PID 4392 wrote to memory of 5480	4392	audnadiu.exe	106
PID 4392 wrote to memory of 5480	4392	audnadiu.exe	106
PID 4392 wrote to memory of 5480	4392	audnadiu.exe	106
PID 4392 wrote to memory of 5480	4392	audnadiu.exe	106

C:\Users\Admin\AppData\Local\Temp\ae94bcdff4c4db9cd6aaa662d87f6b3bc9b1de7a786156307c42aad4f4d72334.exe
"C:\Users\Admin\AppData\Local\Temp\ae94bcdff4c4db9cd6aaa662d87f6b3bc9b1de7a786156307c42aad4f4d72334.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2860
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ybehcufl\
  2⤵
  PID:1904
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\audnadiu.exe" C:\Windows\SysWOW64\ybehcufl\
  2⤵
  PID:5748
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create ybehcufl binPath= "C:\Windows\SysWOW64\ybehcufl\audnadiu.exe /d\"C:\Users\Admin\AppData\Local\Temp\ae94bcdff4c4db9cd6aaa662d87f6b3bc9b1de7a786156307c42aad4f4d72334.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:2756
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description ybehcufl "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:4672
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start ybehcufl
  2⤵
  - Launches sc.exe
  PID:1424
- 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:3132
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2860 -s 888
  2⤵
  - Program crash
  PID:5596

C:\Windows\SysWOW64\ybehcufl\audnadiu.exe
C:\Windows\SysWOW64\ybehcufl\audnadiu.exe /d"C:\Users\Admin\AppData\Local\Temp\ae94bcdff4c4db9cd6aaa662d87f6b3bc9b1de7a786156307c42aad4f4d72334.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4392
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:5480
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4392 -s 440
  2⤵
  - Program crash
  PID:3664

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 2860 -ip 2860
1⤵
PID:4880

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 568 -p 4392 -ip 4392
1⤵
PID:5324

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

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

Impair Defenses

1

T1562

Disable or Modify System Firewall

Modify Registry

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

audnadiu.exe

Path C:\Users\Admin\AppData\Local\Temp\audnadiu.exe
Size 14.6MB
SHA256 20ab515e9396ece18f7dc91c16c8a0c3f9e227418937fa87a846ac6aec5e2d91
MD5 2cbd031c82ba7939e39057a6f24d3a00
SHA1 ad3c8e2f51bd5ad85ec4030e232097a38029fe8e
SHA512 d204a143c68f221b4499694441c69f68bfa9cd0b3c46544427083bdb2e8603e628b7193f79f73099b5ef6c50bb8c4127cccd3699910f616bc35eeff1e9e67856
SSDEEP 6144:PKNDMp7tMWhHwXO3kyvzC0+9XFWYW//////////////////////////////////n:PKNDMpOmHKcRv+0u
MD5 SHA1 SHA512 SSDEEP

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memory/2860-1-0x00007FFA2D1B0000-0x00007FFA2D3A5000-memory.dmp

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memory/2860-7-0x00007FFA2D1B0000-0x00007FFA2D3A5000-memory.dmp

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memory/2860-6-0x0000000000400000-0x000000000086C000-memory.dmp

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memory/4392-11-0x00007FFA2D1B0000-0x00007FFA2D3A5000-memory.dmp

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memory/4392-13-0x0000000000400000-0x000000000086C000-memory.dmp

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memory/5480-8-0x0000000000120000-0x0000000000135000-memory.dmp

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memory/5480-10-0x0000000000120000-0x0000000000135000-memory.dmp

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memory/5480-12-0x0000000000120000-0x0000000000135000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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