tofsee | 666530df26ece50c7111222095f41eb2735f2888b0467e92bfd101e10b415695

Analysis

max time kernel
167s
max time network
201s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
09/01/2024, 13:46

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General

Target

4e75e88a93e9867001c1aed9c7223d5b.exe
Size

11.8MB
MD5

4e75e88a93e9867001c1aed9c7223d5b
SHA1

29851dc5848b185c54fa92ef4d782685a2de7398
SHA256

666530df26ece50c7111222095f41eb2735f2888b0467e92bfd101e10b415695
SHA512

e8025e903ba9614d01a58bd383ead0fa3603c71dc66617323a9e6ab86143350bbda98da19cc4d1bc497e075e78e87f01f73a883ea1c17abcf8feb07b080dcea8
SSDEEP

24576:gm1111111111111111111111111111111111111111111111111111111111111n:

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
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
1652	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\qvwjqxko\ImagePath = "C:\\Windows\\SysWOW64\\qvwjqxko\\nwioytpf.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
1584	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1108	nwioytpf.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1108 set thread context of 1584	1108	nwioytpf.exe	42

Launches sc.exe 3 IoCs

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

pid	Process
2680	sc.exe
2520	sc.exe
1728	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 2760 wrote to memory of 1256	2760	4e75e88a93e9867001c1aed9c7223d5b.exe	29
PID 2760 wrote to memory of 1256	2760	4e75e88a93e9867001c1aed9c7223d5b.exe	29
PID 2760 wrote to memory of 1256	2760	4e75e88a93e9867001c1aed9c7223d5b.exe	29
PID 2760 wrote to memory of 1256	2760	4e75e88a93e9867001c1aed9c7223d5b.exe	29
PID 2760 wrote to memory of 2872	2760	4e75e88a93e9867001c1aed9c7223d5b.exe	31
PID 2760 wrote to memory of 2872	2760	4e75e88a93e9867001c1aed9c7223d5b.exe	31
PID 2760 wrote to memory of 2872	2760	4e75e88a93e9867001c1aed9c7223d5b.exe	31
PID 2760 wrote to memory of 2872	2760	4e75e88a93e9867001c1aed9c7223d5b.exe	31
PID 2760 wrote to memory of 2680	2760	4e75e88a93e9867001c1aed9c7223d5b.exe	34
PID 2760 wrote to memory of 2680	2760	4e75e88a93e9867001c1aed9c7223d5b.exe	34
PID 2760 wrote to memory of 2680	2760	4e75e88a93e9867001c1aed9c7223d5b.exe	34
PID 2760 wrote to memory of 2680	2760	4e75e88a93e9867001c1aed9c7223d5b.exe	34
PID 2760 wrote to memory of 2520	2760	4e75e88a93e9867001c1aed9c7223d5b.exe	35
PID 2760 wrote to memory of 2520	2760	4e75e88a93e9867001c1aed9c7223d5b.exe	35
PID 2760 wrote to memory of 2520	2760	4e75e88a93e9867001c1aed9c7223d5b.exe	35
PID 2760 wrote to memory of 2520	2760	4e75e88a93e9867001c1aed9c7223d5b.exe	35
PID 2760 wrote to memory of 1728	2760	4e75e88a93e9867001c1aed9c7223d5b.exe	38
PID 2760 wrote to memory of 1728	2760	4e75e88a93e9867001c1aed9c7223d5b.exe	38
PID 2760 wrote to memory of 1728	2760	4e75e88a93e9867001c1aed9c7223d5b.exe	38
PID 2760 wrote to memory of 1728	2760	4e75e88a93e9867001c1aed9c7223d5b.exe	38
PID 2760 wrote to memory of 1652	2760	4e75e88a93e9867001c1aed9c7223d5b.exe	39
PID 2760 wrote to memory of 1652	2760	4e75e88a93e9867001c1aed9c7223d5b.exe	39
PID 2760 wrote to memory of 1652	2760	4e75e88a93e9867001c1aed9c7223d5b.exe	39
PID 2760 wrote to memory of 1652	2760	4e75e88a93e9867001c1aed9c7223d5b.exe	39
PID 1108 wrote to memory of 1584	1108	nwioytpf.exe	42
PID 1108 wrote to memory of 1584	1108	nwioytpf.exe	42
PID 1108 wrote to memory of 1584	1108	nwioytpf.exe	42
PID 1108 wrote to memory of 1584	1108	nwioytpf.exe	42
PID 1108 wrote to memory of 1584	1108	nwioytpf.exe	42
PID 1108 wrote to memory of 1584	1108	nwioytpf.exe	42

C:\Users\Admin\AppData\Local\Temp\4e75e88a93e9867001c1aed9c7223d5b.exe
"C:\Users\Admin\AppData\Local\Temp\4e75e88a93e9867001c1aed9c7223d5b.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2760
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\qvwjqxko\
  2⤵
  PID:1256
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\nwioytpf.exe" C:\Windows\SysWOW64\qvwjqxko\
  2⤵
  PID:2872
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create qvwjqxko binPath= "C:\Windows\SysWOW64\qvwjqxko\nwioytpf.exe /d\"C:\Users\Admin\AppData\Local\Temp\4e75e88a93e9867001c1aed9c7223d5b.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:2680
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description qvwjqxko "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:2520
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start qvwjqxko
  2⤵
  - Launches sc.exe
  PID:1728
- 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:1652

C:\Windows\SysWOW64\qvwjqxko\nwioytpf.exe
C:\Windows\SysWOW64\qvwjqxko\nwioytpf.exe /d"C:\Users\Admin\AppData\Local\Temp\4e75e88a93e9867001c1aed9c7223d5b.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1108
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:1584

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

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\nwioytpf.exe

Filesize
2.7MB

MD5
5d2adaaec3e00d83bf1cc6edf11994c9

SHA1
abeab4618e5f3eb0b36edb4187d34bb4ab56e51d

SHA256
5a7d1dc17114e436a2f9f1e17f57eb4565c7b4f07645464e56ef2d0b58d9eda4

SHA512
0c62af37d6ec0e55643359b7d95ab208688e6aa3648df62c91c9638ed0fdca4bf5e6829f2a04c626171a730bb89f5c1f767a2aeb4847b22a61f687e0519aa9b7

Download Submit
C:\Windows\SysWOW64\qvwjqxko\nwioytpf.exe

Filesize
2.9MB

MD5
897c80fad08edfed432e38921696c4b4

SHA1
835b3e72fdc1b08a4fe7b7bb45f1df1d40ce7108

SHA256
55c4bc79a90ae8ec1f8c765aa86debc05da24f0f12f16cdea53c19df9a39c24a

SHA512
cc997345ce2cf8404311eeae86918ce1a31dfd5467fcea3e39d5f782a24d0067773d68a2e1ac0ba195d59d5017afaebcba36eef6befe3fcd9a19d70fc63bd033

Download Submit
memory/1108-17-0x0000000000400000-0x0000000002C6D000-memory.dmp

Filesize
40.4MB

Download
memory/1108-12-0x0000000000400000-0x0000000002C6D000-memory.dmp

Filesize
40.4MB

Download
memory/1108-9-0x0000000002D40000-0x0000000002E40000-memory.dmp

Filesize
1024KB

Download
memory/1584-19-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/1584-10-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/1584-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1584-15-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/1584-20-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/1584-21-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/1584-22-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2760-6-0x0000000000400000-0x0000000002C6D000-memory.dmp

Filesize
40.4MB

Download
memory/2760-4-0x0000000000400000-0x0000000002C6D000-memory.dmp

Filesize
40.4MB

Download
memory/2760-3-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/2760-1-0x0000000002D90000-0x0000000002E90000-memory.dmp

Filesize
1024KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads