tofsee | 241945fdc2d8e9d5dd8b40ae553d6c6a15a1b2ff3841f5fb174fc654832bad2e

General

Target
aec0249eb717fb18a6e5f6bbd811bb7c.exe
Size 11.3MB
Sample201214-dlsa631gh2
SHA256 241945fdc2d8e9d5dd8b40ae553d6c6a15a1b2ff3841f5fb174fc654832bad2e
MD5 aec0249eb717fb18a6e5f6bbd811bb7c
SHA1 b64f46fd11dd2a1b5d92a8f1f68103b8dfd4a550
SHA512 28b23446cec58506ca056984897defe3a0dc6c2d2f159e51b56cbd61814c0ff36f61643dccf4bc0d8ccb44671d2cdc5a30d461aaeeb76021686f575668c0d132
MD5 SHA1 SHA512

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee
Windows security bypass 2 TTPs
evasion trojan

Disabling Security Tools
T1089

Modify Registry
T1112
Creates new service(s) 1 TTPs
persistence

New Service
T1050

Executes dropped EXE 1 IoCs

pid	Process
4060	ctmpwjvu.exe

Modifies Windows Firewall 1 TTPs
evasion

Modify Existing Service
T1031
Sets service image path in registry 2 TTPs
persistence

Registry Run Keys / Startup Folder
T1060

Modify Registry
T1112

Deletes itself 1 IoCs

pid	Process
4040	svchost.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4060 set thread context of 4040	4060	ctmpwjvu.exe	88

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

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2604 wrote to memory of 2916	2604	aec0249eb717fb18a6e5f6bbd811bb7c.exe	75
PID 2604 wrote to memory of 2916	2604	aec0249eb717fb18a6e5f6bbd811bb7c.exe	75
PID 2604 wrote to memory of 2916	2604	aec0249eb717fb18a6e5f6bbd811bb7c.exe	75
PID 2604 wrote to memory of 2688	2604	aec0249eb717fb18a6e5f6bbd811bb7c.exe	77
PID 2604 wrote to memory of 2688	2604	aec0249eb717fb18a6e5f6bbd811bb7c.exe	77
PID 2604 wrote to memory of 2688	2604	aec0249eb717fb18a6e5f6bbd811bb7c.exe	77
PID 2604 wrote to memory of 3020	2604	aec0249eb717fb18a6e5f6bbd811bb7c.exe	79
PID 2604 wrote to memory of 3020	2604	aec0249eb717fb18a6e5f6bbd811bb7c.exe	79
PID 2604 wrote to memory of 3020	2604	aec0249eb717fb18a6e5f6bbd811bb7c.exe	79
PID 2604 wrote to memory of 2756	2604	aec0249eb717fb18a6e5f6bbd811bb7c.exe	81
PID 2604 wrote to memory of 2756	2604	aec0249eb717fb18a6e5f6bbd811bb7c.exe	81
PID 2604 wrote to memory of 2756	2604	aec0249eb717fb18a6e5f6bbd811bb7c.exe	81
PID 2604 wrote to memory of 1344	2604	aec0249eb717fb18a6e5f6bbd811bb7c.exe	83
PID 2604 wrote to memory of 1344	2604	aec0249eb717fb18a6e5f6bbd811bb7c.exe	83
PID 2604 wrote to memory of 1344	2604	aec0249eb717fb18a6e5f6bbd811bb7c.exe	83
PID 2604 wrote to memory of 2180	2604	aec0249eb717fb18a6e5f6bbd811bb7c.exe	85
PID 2604 wrote to memory of 2180	2604	aec0249eb717fb18a6e5f6bbd811bb7c.exe	85
PID 2604 wrote to memory of 2180	2604	aec0249eb717fb18a6e5f6bbd811bb7c.exe	85
PID 4060 wrote to memory of 4040	4060	ctmpwjvu.exe	88
PID 4060 wrote to memory of 4040	4060	ctmpwjvu.exe	88
PID 4060 wrote to memory of 4040	4060	ctmpwjvu.exe	88
PID 4060 wrote to memory of 4040	4060	ctmpwjvu.exe	88
PID 4060 wrote to memory of 4040	4060	ctmpwjvu.exe	88

C:\Users\Admin\AppData\Local\Temp\aec0249eb717fb18a6e5f6bbd811bb7c.exe
"C:\Users\Admin\AppData\Local\Temp\aec0249eb717fb18a6e5f6bbd811bb7c.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2604
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\jvzaiuaz\
  2⤵
  PID:2916
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ctmpwjvu.exe" C:\Windows\SysWOW64\jvzaiuaz\
  2⤵
  PID:2688
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create jvzaiuaz binPath= "C:\Windows\SysWOW64\jvzaiuaz\ctmpwjvu.exe /d\"C:\Users\Admin\AppData\Local\Temp\aec0249eb717fb18a6e5f6bbd811bb7c.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  PID:3020
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description jvzaiuaz "wifi internet conection"
  2⤵
  PID:2756
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start jvzaiuaz
  2⤵
  PID:1344
- 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⤵
  PID:2180

C:\Windows\SysWOW64\jvzaiuaz\ctmpwjvu.exe
C:\Windows\SysWOW64\jvzaiuaz\ctmpwjvu.exe /d"C:\Users\Admin\AppData\Local\Temp\aec0249eb717fb18a6e5f6bbd811bb7c.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4060
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Deletes itself
  PID:4040