tofsee | dcc331955bb4aee347e5702cd4311e66266c4bdf2d7e75eaaecec72ff45eaeb5

General

Target

0bc1320cc6400eb3d0ef6e0ffd52ad9e.exe
Size

15.0MB
MD5

0bc1320cc6400eb3d0ef6e0ffd52ad9e
SHA1

e507245cc7fae623067823c1e32c3059e68ba267
SHA256

dcc331955bb4aee347e5702cd4311e66266c4bdf2d7e75eaaecec72ff45eaeb5
SHA512

395e3938389375b5a171df71980aa5853ddd662147692a4765f24ccc1d6d9296e6f53d338ce75e045a7bf79ef6c3df8beb77fca32a3f39b141afafe889f9a68a
SSDEEP

24576:CerU5sWbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbH:CsW

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
3456	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\daswzaor\ImagePath = "C:\\Windows\\SysWOW64\\daswzaor\\jbggnfzd.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-1-5-21-3791175113-1062217823-1177695025-1000\Control Panel\International\Geo\Nation	0bc1320cc6400eb3d0ef6e0ffd52ad9e.exe

Executes dropped EXE 1 IoCs

pid	Process
384	jbggnfzd.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 384 set thread context of 3528	384	jbggnfzd.exe	102

Launches sc.exe 3 IoCs

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

pid	Process
5076	sc.exe
1636	sc.exe
3892	sc.exe

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

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1376 wrote to memory of 4696	1376	0bc1320cc6400eb3d0ef6e0ffd52ad9e.exe	44
PID 1376 wrote to memory of 4696	1376	0bc1320cc6400eb3d0ef6e0ffd52ad9e.exe	44
PID 1376 wrote to memory of 4696	1376	0bc1320cc6400eb3d0ef6e0ffd52ad9e.exe	44
PID 1376 wrote to memory of 2960	1376	0bc1320cc6400eb3d0ef6e0ffd52ad9e.exe	54
PID 1376 wrote to memory of 2960	1376	0bc1320cc6400eb3d0ef6e0ffd52ad9e.exe	54
PID 1376 wrote to memory of 2960	1376	0bc1320cc6400eb3d0ef6e0ffd52ad9e.exe	54
PID 1376 wrote to memory of 5076	1376	0bc1320cc6400eb3d0ef6e0ffd52ad9e.exe	64
PID 1376 wrote to memory of 5076	1376	0bc1320cc6400eb3d0ef6e0ffd52ad9e.exe	64
PID 1376 wrote to memory of 5076	1376	0bc1320cc6400eb3d0ef6e0ffd52ad9e.exe	64
PID 1376 wrote to memory of 1636	1376	0bc1320cc6400eb3d0ef6e0ffd52ad9e.exe	74
PID 1376 wrote to memory of 1636	1376	0bc1320cc6400eb3d0ef6e0ffd52ad9e.exe	74
PID 1376 wrote to memory of 1636	1376	0bc1320cc6400eb3d0ef6e0ffd52ad9e.exe	74
PID 1376 wrote to memory of 3892	1376	0bc1320cc6400eb3d0ef6e0ffd52ad9e.exe	84
PID 1376 wrote to memory of 3892	1376	0bc1320cc6400eb3d0ef6e0ffd52ad9e.exe	84
PID 1376 wrote to memory of 3892	1376	0bc1320cc6400eb3d0ef6e0ffd52ad9e.exe	84
PID 1376 wrote to memory of 3456	1376	0bc1320cc6400eb3d0ef6e0ffd52ad9e.exe	94
PID 1376 wrote to memory of 3456	1376	0bc1320cc6400eb3d0ef6e0ffd52ad9e.exe	94
PID 1376 wrote to memory of 3456	1376	0bc1320cc6400eb3d0ef6e0ffd52ad9e.exe	94
PID 384 wrote to memory of 3528	384	jbggnfzd.exe	102
PID 384 wrote to memory of 3528	384	jbggnfzd.exe	102
PID 384 wrote to memory of 3528	384	jbggnfzd.exe	102
PID 384 wrote to memory of 3528	384	jbggnfzd.exe	102
PID 384 wrote to memory of 3528	384	jbggnfzd.exe	102

C:\Users\Admin\AppData\Local\Temp\0bc1320cc6400eb3d0ef6e0ffd52ad9e.exe
"C:\Users\Admin\AppData\Local\Temp\0bc1320cc6400eb3d0ef6e0ffd52ad9e.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1376
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\daswzaor\
  2⤵
  PID:4696
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\jbggnfzd.exe" C:\Windows\SysWOW64\daswzaor\
  2⤵
  PID:2960
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create daswzaor binPath= "C:\Windows\SysWOW64\daswzaor\jbggnfzd.exe /d\"C:\Users\Admin\AppData\Local\Temp\0bc1320cc6400eb3d0ef6e0ffd52ad9e.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:5076
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description daswzaor "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:1636
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start daswzaor
  2⤵
  - Launches sc.exe
  PID:3892
- 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:3456

C:\Windows\SysWOW64\daswzaor\jbggnfzd.exe
C:\Windows\SysWOW64\daswzaor\jbggnfzd.exe /d"C:\Users\Admin\AppData\Local\Temp\0bc1320cc6400eb3d0ef6e0ffd52ad9e.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:384
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  PID:3528

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/384-17-0x0000000000400000-0x000000000046D000-memory.dmp

Filesize
436KB

Download
memory/384-10-0x0000000000400000-0x000000000046D000-memory.dmp

Filesize
436KB

Download
memory/384-23-0x00000000004F0000-0x0000000000503000-memory.dmp

Filesize
76KB

Download
memory/384-8-0x00000000006B0000-0x00000000007B0000-memory.dmp

Filesize
1024KB

Download
memory/1376-3-0x0000000000400000-0x000000000046D000-memory.dmp

Filesize
436KB

Download
memory/1376-1-0x0000000000630000-0x0000000000730000-memory.dmp

Filesize
1024KB

Download
memory/1376-2-0x00000000005D0000-0x00000000005E3000-memory.dmp

Filesize
76KB

Download
memory/1376-14-0x0000000000400000-0x000000000046D000-memory.dmp

Filesize
436KB

Download
memory/1376-19-0x0000000000630000-0x0000000000730000-memory.dmp

Filesize
1024KB

Download
memory/3528-13-0x0000000000F80000-0x0000000000F95000-memory.dmp

Filesize
84KB

Download
memory/3528-16-0x0000000000F80000-0x0000000000F95000-memory.dmp

Filesize
84KB

Download
memory/3528-15-0x0000000000F80000-0x0000000000F95000-memory.dmp

Filesize
84KB

Download
memory/3528-9-0x0000000000F80000-0x0000000000F95000-memory.dmp

Filesize
84KB

Download
memory/3528-25-0x0000000000F80000-0x0000000000F95000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads