tofsee | 6a06458b7c201f127abb31d875e4a9829a6fbc50fd99a6ab96c31be20adf6ed5

General

Target

a3638663ddea51de084fed57406d0960.exe
Size

328KB
MD5

a3638663ddea51de084fed57406d0960
SHA1

d18a5dc7db382289a97e063a8c3937dc04f9cc76
SHA256

6a06458b7c201f127abb31d875e4a9829a6fbc50fd99a6ab96c31be20adf6ed5
SHA512

94ca34a3c4a983af206bdd81e56c1a1d20a09728975843ce1bdff045744bb6992d72aa822bb3ffa910e2286aa1b2e6a1f3ce418eb1f35ca5284fd9c184997e80
SSDEEP

6144:E5u/uI5RT6FKb/XHtnl26TTp3aM0wv+H0r5dzLvq1ouhOhycoJlf:Rz5RuW/D2OpqMtGHo/zDq1ousycoJl

Score

10^/10

tofsee evasion 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) 1 TTPs
persistence

Windows Service
T1543.003

Modifies Windows Firewall 1 TTPs 1 IoCs

evasion

Windows Service

T1543.003

pid	Process
1516	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\qlglteih\ImagePath = "C:\\Windows\\SysWOW64\\qlglteih\\cttmcbcq.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-1-5-21-635608581-3370340891-292606865-1000\Control Panel\International\Geo\Nation	a3638663ddea51de084fed57406d0960.exe

Deletes itself 1 IoCs

pid	Process
4868	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1632	cttmcbcq.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1632 set thread context of 4868	1632	cttmcbcq.exe	117

Launches sc.exe 3 IoCs

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

pid	Process
1940	sc.exe
4916	sc.exe
2248	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
1068	3680	WerFault.exe	16
4536	1632	WerFault.exe	111

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3680 wrote to memory of 3756	3680	a3638663ddea51de084fed57406d0960.exe	92
PID 3680 wrote to memory of 3756	3680	a3638663ddea51de084fed57406d0960.exe	92
PID 3680 wrote to memory of 3756	3680	a3638663ddea51de084fed57406d0960.exe	92
PID 3680 wrote to memory of 1816	3680	a3638663ddea51de084fed57406d0960.exe	96
PID 3680 wrote to memory of 1816	3680	a3638663ddea51de084fed57406d0960.exe	96
PID 3680 wrote to memory of 1816	3680	a3638663ddea51de084fed57406d0960.exe	96
PID 3680 wrote to memory of 1940	3680	a3638663ddea51de084fed57406d0960.exe	98
PID 3680 wrote to memory of 1940	3680	a3638663ddea51de084fed57406d0960.exe	98
PID 3680 wrote to memory of 1940	3680	a3638663ddea51de084fed57406d0960.exe	98
PID 3680 wrote to memory of 4916	3680	a3638663ddea51de084fed57406d0960.exe	102
PID 3680 wrote to memory of 4916	3680	a3638663ddea51de084fed57406d0960.exe	102
PID 3680 wrote to memory of 4916	3680	a3638663ddea51de084fed57406d0960.exe	102
PID 3680 wrote to memory of 2248	3680	a3638663ddea51de084fed57406d0960.exe	105
PID 3680 wrote to memory of 2248	3680	a3638663ddea51de084fed57406d0960.exe	105
PID 3680 wrote to memory of 2248	3680	a3638663ddea51de084fed57406d0960.exe	105
PID 3680 wrote to memory of 1516	3680	a3638663ddea51de084fed57406d0960.exe	107
PID 3680 wrote to memory of 1516	3680	a3638663ddea51de084fed57406d0960.exe	107
PID 3680 wrote to memory of 1516	3680	a3638663ddea51de084fed57406d0960.exe	107
PID 1632 wrote to memory of 4868	1632	cttmcbcq.exe	117
PID 1632 wrote to memory of 4868	1632	cttmcbcq.exe	117
PID 1632 wrote to memory of 4868	1632	cttmcbcq.exe	117
PID 1632 wrote to memory of 4868	1632	cttmcbcq.exe	117
PID 1632 wrote to memory of 4868	1632	cttmcbcq.exe	117

C:\Users\Admin\AppData\Local\Temp\a3638663ddea51de084fed57406d0960.exe
"C:\Users\Admin\AppData\Local\Temp\a3638663ddea51de084fed57406d0960.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3680
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\qlglteih\
  2⤵
  PID:3756
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\cttmcbcq.exe" C:\Windows\SysWOW64\qlglteih\
  2⤵
  PID:1816
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create qlglteih binPath= "C:\Windows\SysWOW64\qlglteih\cttmcbcq.exe /d\"C:\Users\Admin\AppData\Local\Temp\a3638663ddea51de084fed57406d0960.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:1940
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description qlglteih "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:4916
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start qlglteih
  2⤵
  - Launches sc.exe
  PID:2248
- 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:1516
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3680 -s 1084
  2⤵
  - Program crash
  PID:1068

C:\Windows\SysWOW64\qlglteih\cttmcbcq.exe
C:\Windows\SysWOW64\qlglteih\cttmcbcq.exe /d"C:\Users\Admin\AppData\Local\Temp\a3638663ddea51de084fed57406d0960.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1632
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:4868
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1632 -s 556
  2⤵
  - Program crash
  PID:4536

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 488 -p 1632 -ip 1632
1⤵
PID:4552

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 3680 -ip 3680
1⤵
PID:464

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\cttmcbcq.exe

Filesize
4.7MB

MD5
3191d426e3f843221fb006f66ce8f390

SHA1
3fce9fad00eba7aaffc7e36a71f559cfd946d6e1

SHA256
c7c3cf5fecfd90804f545b578af2d370213d8d94cd4ee0310429b3f2cf59ff4c

SHA512
ee9c1e942dc431ec90f9821740c21d6f75a395aca93af7c3205e28e1bccc439121d3741e03fcb21f57f4912bbce83830f783c65012faf013dd6c0ae0ad9f2bc3

Download Submit
C:\Windows\SysWOW64\qlglteih\cttmcbcq.exe

Filesize
925KB

MD5
63a724563c88ecab0c4828983782665f

SHA1
25dfcf2805d7cbb8bc9a79ab9eea584566297f26

SHA256
11f83580d8c705e8abbb0b089eb2c9426baa0aa860bfaeba6cf59553dfe0fb53

SHA512
a93d2b07750a70365b4ff0368ecb56788a82b375c1688b385ae477aef1d1618fb0656018a8b83db34b30d54be0b7e8078a13bbf16e36721ac2f8b98272f9ef91

Download Submit
memory/1632-16-0x0000000000500000-0x0000000000600000-memory.dmp

Filesize
1024KB

Download
memory/1632-22-0x0000000000400000-0x000000000046D000-memory.dmp

Filesize
436KB

Download
memory/1632-17-0x0000000000400000-0x000000000046D000-memory.dmp

Filesize
436KB

Download
memory/3680-9-0x0000000000540000-0x0000000000640000-memory.dmp

Filesize
1024KB

Download
memory/3680-11-0x0000000002070000-0x0000000002083000-memory.dmp

Filesize
76KB

Download
memory/3680-3-0x0000000000400000-0x000000000046D000-memory.dmp

Filesize
436KB

Download
memory/3680-13-0x0000000000400000-0x000000000046D000-memory.dmp

Filesize
436KB

Download
memory/3680-2-0x0000000002070000-0x0000000002083000-memory.dmp

Filesize
76KB

Download
memory/3680-1-0x0000000000540000-0x0000000000640000-memory.dmp

Filesize
1024KB

Download
memory/3680-5-0x0000000000400000-0x000000000046D000-memory.dmp

Filesize
436KB

Download
memory/4868-21-0x0000000001040000-0x0000000001055000-memory.dmp

Filesize
84KB

Download
memory/4868-18-0x0000000001040000-0x0000000001055000-memory.dmp

Filesize
84KB

Download
memory/4868-24-0x0000000001040000-0x0000000001055000-memory.dmp

Filesize
84KB

Download
memory/4868-25-0x0000000001040000-0x0000000001055000-memory.dmp

Filesize
84KB

Download
memory/4868-26-0x0000000001040000-0x0000000001055000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads