tofsee | 2603757f92034678ded0d4e72bbb78f2b29d6f7ee8f809b02d6056750fa579e4

General

Target
00f168270e8ebf2584f151d7cc7236da.exe
Size 11.7MB
Sample201214-xk2xh8waba
SHA256 2603757f92034678ded0d4e72bbb78f2b29d6f7ee8f809b02d6056750fa579e4
MD5 00f168270e8ebf2584f151d7cc7236da
SHA1 527dac58289ec820691048cb320d65c01c193e65
SHA512 184b6b12d02c673dcc6d6c4f478fba8f8a5fd036fc94118ecbd490ef2735d7dd8aeee8132932e3ea43d5a45a02823d3c473a713037a4fd9c871723db6e350837
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
4092	dcsovrw.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
4068	svchost.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4092 set thread context of 4068	4092	dcsovrw.exe	86

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 4712 wrote to memory of 1720	4712	00f168270e8ebf2584f151d7cc7236da.exe	74
PID 4712 wrote to memory of 1720	4712	00f168270e8ebf2584f151d7cc7236da.exe	74
PID 4712 wrote to memory of 1720	4712	00f168270e8ebf2584f151d7cc7236da.exe	74
PID 4712 wrote to memory of 504	4712	00f168270e8ebf2584f151d7cc7236da.exe	77
PID 4712 wrote to memory of 504	4712	00f168270e8ebf2584f151d7cc7236da.exe	77
PID 4712 wrote to memory of 504	4712	00f168270e8ebf2584f151d7cc7236da.exe	77
PID 4712 wrote to memory of 4180	4712	00f168270e8ebf2584f151d7cc7236da.exe	79
PID 4712 wrote to memory of 4180	4712	00f168270e8ebf2584f151d7cc7236da.exe	79
PID 4712 wrote to memory of 4180	4712	00f168270e8ebf2584f151d7cc7236da.exe	79
PID 4712 wrote to memory of 3828	4712	00f168270e8ebf2584f151d7cc7236da.exe	81
PID 4712 wrote to memory of 3828	4712	00f168270e8ebf2584f151d7cc7236da.exe	81
PID 4712 wrote to memory of 3828	4712	00f168270e8ebf2584f151d7cc7236da.exe	81
PID 4712 wrote to memory of 2136	4712	00f168270e8ebf2584f151d7cc7236da.exe	83
PID 4712 wrote to memory of 2136	4712	00f168270e8ebf2584f151d7cc7236da.exe	83
PID 4712 wrote to memory of 2136	4712	00f168270e8ebf2584f151d7cc7236da.exe	83
PID 4092 wrote to memory of 4068	4092	dcsovrw.exe	86
PID 4092 wrote to memory of 4068	4092	dcsovrw.exe	86
PID 4092 wrote to memory of 4068	4092	dcsovrw.exe	86
PID 4092 wrote to memory of 4068	4092	dcsovrw.exe	86
PID 4092 wrote to memory of 4068	4092	dcsovrw.exe	86
PID 4712 wrote to memory of 3104	4712	00f168270e8ebf2584f151d7cc7236da.exe	87
PID 4712 wrote to memory of 3104	4712	00f168270e8ebf2584f151d7cc7236da.exe	87
PID 4712 wrote to memory of 3104	4712	00f168270e8ebf2584f151d7cc7236da.exe	87

C:\Users\Admin\AppData\Local\Temp\00f168270e8ebf2584f151d7cc7236da.exe
"C:\Users\Admin\AppData\Local\Temp\00f168270e8ebf2584f151d7cc7236da.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4712
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\bprlvgpv\
  2⤵
  PID:1720
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\dcsovrw.exe" C:\Windows\SysWOW64\bprlvgpv\
  2⤵
  PID:504
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create bprlvgpv binPath= "C:\Windows\SysWOW64\bprlvgpv\dcsovrw.exe /d\"C:\Users\Admin\AppData\Local\Temp\00f168270e8ebf2584f151d7cc7236da.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  PID:4180
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description bprlvgpv "wifi internet conection"
  2⤵
  PID:3828
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start bprlvgpv
  2⤵
  PID:2136
- 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:3104

C:\Windows\SysWOW64\bprlvgpv\dcsovrw.exe
C:\Windows\SysWOW64\bprlvgpv\dcsovrw.exe /d"C:\Users\Admin\AppData\Local\Temp\00f168270e8ebf2584f151d7cc7236da.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4092
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Deletes itself
  PID:4068