tofsee | f303448daa6e0457f26ae9a14cb80bf592b31550a1cb8fdc284c6bbe87494f42

Analysis

max time kernel
146s
max time network
149s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
25-12-2023 17:31

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General

Target

310d54057b0e553d230284fdcdd1ead1.exe
Size

335KB
MD5

310d54057b0e553d230284fdcdd1ead1
SHA1

9dab1c464e3d8e4551070e854509d4b4aae903ac
SHA256

f303448daa6e0457f26ae9a14cb80bf592b31550a1cb8fdc284c6bbe87494f42
SHA512

53c1380cd2d322a66551205246bbf9ed0803e70c5e880c4a11c1c1b33db533ce8137ee9805987a6c2979a5ab21207680e8cda05195cfadece8861d1b785a05cb
SSDEEP

3072:FkAgDr/XSqon0LUwWQ2UHxqms7/7btm52yls2LC5J8ZWwoQSwgeb7hiOiPg0tGis:FkhDr/+0LUdbKhsMs268UoSwrb7SpG

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

defeatwax.ru

refabyd.info

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee

Windows security bypass 2 TTPs 1 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\SysWOW64\chpqtwhq = "0"	svchost.exe

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
2332	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\chpqtwhq\ImagePath = "C:\\Windows\\SysWOW64\\chpqtwhq\\zrwwdvpt.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2584	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2592	zrwwdvpt.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2592 set thread context of 2584	2592	zrwwdvpt.exe	41

Launches sc.exe 3 IoCs

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

pid	Process
3024	sc.exe
2272	sc.exe
2724	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 30 IoCs

description	pid	Process	procid_target
PID 2124 wrote to memory of 2400	2124	310d54057b0e553d230284fdcdd1ead1.exe	29
PID 2124 wrote to memory of 2400	2124	310d54057b0e553d230284fdcdd1ead1.exe	29
PID 2124 wrote to memory of 2400	2124	310d54057b0e553d230284fdcdd1ead1.exe	29
PID 2124 wrote to memory of 2400	2124	310d54057b0e553d230284fdcdd1ead1.exe	29
PID 2124 wrote to memory of 2768	2124	310d54057b0e553d230284fdcdd1ead1.exe	31
PID 2124 wrote to memory of 2768	2124	310d54057b0e553d230284fdcdd1ead1.exe	31
PID 2124 wrote to memory of 2768	2124	310d54057b0e553d230284fdcdd1ead1.exe	31
PID 2124 wrote to memory of 2768	2124	310d54057b0e553d230284fdcdd1ead1.exe	31
PID 2124 wrote to memory of 3024	2124	310d54057b0e553d230284fdcdd1ead1.exe	33
PID 2124 wrote to memory of 3024	2124	310d54057b0e553d230284fdcdd1ead1.exe	33
PID 2124 wrote to memory of 3024	2124	310d54057b0e553d230284fdcdd1ead1.exe	33
PID 2124 wrote to memory of 3024	2124	310d54057b0e553d230284fdcdd1ead1.exe	33
PID 2124 wrote to memory of 2272	2124	310d54057b0e553d230284fdcdd1ead1.exe	35
PID 2124 wrote to memory of 2272	2124	310d54057b0e553d230284fdcdd1ead1.exe	35
PID 2124 wrote to memory of 2272	2124	310d54057b0e553d230284fdcdd1ead1.exe	35
PID 2124 wrote to memory of 2272	2124	310d54057b0e553d230284fdcdd1ead1.exe	35
PID 2124 wrote to memory of 2724	2124	310d54057b0e553d230284fdcdd1ead1.exe	37
PID 2124 wrote to memory of 2724	2124	310d54057b0e553d230284fdcdd1ead1.exe	37
PID 2124 wrote to memory of 2724	2124	310d54057b0e553d230284fdcdd1ead1.exe	37
PID 2124 wrote to memory of 2724	2124	310d54057b0e553d230284fdcdd1ead1.exe	37
PID 2124 wrote to memory of 2332	2124	310d54057b0e553d230284fdcdd1ead1.exe	40
PID 2124 wrote to memory of 2332	2124	310d54057b0e553d230284fdcdd1ead1.exe	40
PID 2124 wrote to memory of 2332	2124	310d54057b0e553d230284fdcdd1ead1.exe	40
PID 2124 wrote to memory of 2332	2124	310d54057b0e553d230284fdcdd1ead1.exe	40
PID 2592 wrote to memory of 2584	2592	zrwwdvpt.exe	41
PID 2592 wrote to memory of 2584	2592	zrwwdvpt.exe	41
PID 2592 wrote to memory of 2584	2592	zrwwdvpt.exe	41
PID 2592 wrote to memory of 2584	2592	zrwwdvpt.exe	41
PID 2592 wrote to memory of 2584	2592	zrwwdvpt.exe	41
PID 2592 wrote to memory of 2584	2592	zrwwdvpt.exe	41

C:\Users\Admin\AppData\Local\Temp\310d54057b0e553d230284fdcdd1ead1.exe
"C:\Users\Admin\AppData\Local\Temp\310d54057b0e553d230284fdcdd1ead1.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2124
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\chpqtwhq\
  2⤵
  PID:2400
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\zrwwdvpt.exe" C:\Windows\SysWOW64\chpqtwhq\
  2⤵
  PID:2768
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create chpqtwhq binPath= "C:\Windows\SysWOW64\chpqtwhq\zrwwdvpt.exe /d\"C:\Users\Admin\AppData\Local\Temp\310d54057b0e553d230284fdcdd1ead1.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:3024
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description chpqtwhq "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:2272
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start chpqtwhq
  2⤵
  - Launches sc.exe
  PID:2724
- 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:2332

C:\Windows\SysWOW64\chpqtwhq\zrwwdvpt.exe
C:\Windows\SysWOW64\chpqtwhq\zrwwdvpt.exe /d"C:\Users\Admin\AppData\Local\Temp\310d54057b0e553d230284fdcdd1ead1.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2592
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Windows security bypass
  - Sets service image path in registry
  - Deletes itself
  PID:2584

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Defense Evasion

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
384KB

MD5
583185ad69b868e8daefed87c1c53c1c

SHA1
34d71d160e9a5d2ad52ed01fd046032da67541fb

SHA256
05df8823897e195e8b452dff75542ec410b859d61886fc54eba1a990f81ff548

SHA512
f47f906534c27f2c277b1cf22ccdade204538aa0a3f7a313a772b35b2ee83caf8cac599c9db05116616bdba78ef0b11ad442d9622f1ccf4e4c3b23932b59c5b8

Download Submit
memory/2124-10-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/2124-1-0x00000000032E0000-0x00000000033E0000-memory.dmp

Filesize
1024KB

Download
memory/2124-2-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/2124-7-0x0000000000400000-0x000000000324F000-memory.dmp

Filesize
46.3MB

Download
memory/2124-9-0x00000000032E0000-0x00000000033E0000-memory.dmp

Filesize
1024KB

Download
memory/2124-4-0x0000000000400000-0x000000000324F000-memory.dmp

Filesize
46.3MB

Download
memory/2584-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2584-12-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2584-15-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2584-20-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2584-21-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2584-22-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2584-23-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2592-11-0x00000000033E0000-0x00000000034E0000-memory.dmp

Filesize
1024KB

Download
memory/2592-19-0x0000000000400000-0x000000000324F000-memory.dmp

Filesize
46.3MB

Download
memory/2592-17-0x0000000000400000-0x000000000324F000-memory.dmp

Filesize
46.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads