tofsee | d0eff54fcc3e55633eaf0b74e3e757cd17ac81abe8015cca3496b3f10f9a45d5

Analysis

max time kernel
150s
max time network
121s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
30-12-2023 04:51

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General

Target

0f17b0d4320240b6109bc8a25f505e09.exe
Size

13.0MB
MD5

0f17b0d4320240b6109bc8a25f505e09
SHA1

995e221404656216ce3ff4cd17f82b4b5bdd8c2c
SHA256

d0eff54fcc3e55633eaf0b74e3e757cd17ac81abe8015cca3496b3f10f9a45d5
SHA512

eeca32f1953961d360233613e10818c5398b36e57e888175099b005af646f00a3a82f8fb134690d1b1059ff5ec4fb5bd9ed21a692d68fbbc721b8ba35d74509a
SSDEEP

24576:gT8rgnPp+RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRB:Qp+

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

43.231.4.6

lazystax.ru

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\hsixdidc = "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
2132	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\hsixdidc\ImagePath = "C:\\Windows\\SysWOW64\\hsixdidc\\deghbezr.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2628	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2728	deghbezr.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2728 set thread context of 2628	2728	deghbezr.exe	41

Launches sc.exe 3 IoCs

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

pid	Process
2864	sc.exe
2852	sc.exe
2092	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 2316 wrote to memory of 1804	2316	0f17b0d4320240b6109bc8a25f505e09.exe	28
PID 2316 wrote to memory of 1804	2316	0f17b0d4320240b6109bc8a25f505e09.exe	28
PID 2316 wrote to memory of 1804	2316	0f17b0d4320240b6109bc8a25f505e09.exe	28
PID 2316 wrote to memory of 1804	2316	0f17b0d4320240b6109bc8a25f505e09.exe	28
PID 2316 wrote to memory of 2076	2316	0f17b0d4320240b6109bc8a25f505e09.exe	30
PID 2316 wrote to memory of 2076	2316	0f17b0d4320240b6109bc8a25f505e09.exe	30
PID 2316 wrote to memory of 2076	2316	0f17b0d4320240b6109bc8a25f505e09.exe	30
PID 2316 wrote to memory of 2076	2316	0f17b0d4320240b6109bc8a25f505e09.exe	30
PID 2316 wrote to memory of 2852	2316	0f17b0d4320240b6109bc8a25f505e09.exe	32
PID 2316 wrote to memory of 2852	2316	0f17b0d4320240b6109bc8a25f505e09.exe	32
PID 2316 wrote to memory of 2852	2316	0f17b0d4320240b6109bc8a25f505e09.exe	32
PID 2316 wrote to memory of 2852	2316	0f17b0d4320240b6109bc8a25f505e09.exe	32
PID 2316 wrote to memory of 2092	2316	0f17b0d4320240b6109bc8a25f505e09.exe	34
PID 2316 wrote to memory of 2092	2316	0f17b0d4320240b6109bc8a25f505e09.exe	34
PID 2316 wrote to memory of 2092	2316	0f17b0d4320240b6109bc8a25f505e09.exe	34
PID 2316 wrote to memory of 2092	2316	0f17b0d4320240b6109bc8a25f505e09.exe	34
PID 2316 wrote to memory of 2864	2316	0f17b0d4320240b6109bc8a25f505e09.exe	36
PID 2316 wrote to memory of 2864	2316	0f17b0d4320240b6109bc8a25f505e09.exe	36
PID 2316 wrote to memory of 2864	2316	0f17b0d4320240b6109bc8a25f505e09.exe	36
PID 2316 wrote to memory of 2864	2316	0f17b0d4320240b6109bc8a25f505e09.exe	36
PID 2316 wrote to memory of 2132	2316	0f17b0d4320240b6109bc8a25f505e09.exe	39
PID 2316 wrote to memory of 2132	2316	0f17b0d4320240b6109bc8a25f505e09.exe	39
PID 2316 wrote to memory of 2132	2316	0f17b0d4320240b6109bc8a25f505e09.exe	39
PID 2316 wrote to memory of 2132	2316	0f17b0d4320240b6109bc8a25f505e09.exe	39
PID 2728 wrote to memory of 2628	2728	deghbezr.exe	41
PID 2728 wrote to memory of 2628	2728	deghbezr.exe	41
PID 2728 wrote to memory of 2628	2728	deghbezr.exe	41
PID 2728 wrote to memory of 2628	2728	deghbezr.exe	41
PID 2728 wrote to memory of 2628	2728	deghbezr.exe	41
PID 2728 wrote to memory of 2628	2728	deghbezr.exe	41

C:\Users\Admin\AppData\Local\Temp\0f17b0d4320240b6109bc8a25f505e09.exe
"C:\Users\Admin\AppData\Local\Temp\0f17b0d4320240b6109bc8a25f505e09.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2316
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\hsixdidc\
  2⤵
  PID:1804
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\deghbezr.exe" C:\Windows\SysWOW64\hsixdidc\
  2⤵
  PID:2076
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create hsixdidc binPath= "C:\Windows\SysWOW64\hsixdidc\deghbezr.exe /d\"C:\Users\Admin\AppData\Local\Temp\0f17b0d4320240b6109bc8a25f505e09.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:2852
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description hsixdidc "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:2092
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start hsixdidc
  2⤵
  - Launches sc.exe
  PID:2864
- 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:2132

C:\Windows\SysWOW64\hsixdidc\deghbezr.exe
C:\Windows\SysWOW64\hsixdidc\deghbezr.exe /d"C:\Users\Admin\AppData\Local\Temp\0f17b0d4320240b6109bc8a25f505e09.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2728
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Windows security bypass
  - Sets service image path in registry
  - Deletes itself
  PID:2628

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\deghbezr.exe

Filesize
6.9MB

MD5
5e019435074f8d1c8e0588623a41f89b

SHA1
1eb2ec1ca760722ce823cb18ac488cf9544fdef0

SHA256
66e09d5b25e60136309d909c3aac744bb0604198cd2c6b20476947462d21e542

SHA512
d6826d2081e8a0d2a6a1bf5e308baf79723887af69157ceb7c63fbd9f71df5611613fe44d55d0643d0cce2d1f9dafb09d3906225ecabcdcfe3937cfabce681dc

Download Submit
C:\Windows\SysWOW64\hsixdidc\deghbezr.exe

Filesize
2.8MB

MD5
e4ba95a389d1567853162030da7ae16a

SHA1
0c1e757010473fcfaf541ac85d621966f6c13a14

SHA256
02b7192068d54b88aec859e7ebe2ebe031187e177382f2d48d63dfcb631f2833

SHA512
d89aef3cfe77e62a277af309e206214aee8c1056a9dd5d04beb46b559ce83071031b77926ea6cc35a59d8ee182f894e9dcb3476cf59f92170c74c9a5550e321f

Download Submit
memory/2316-1-0x0000000000A20000-0x0000000000B20000-memory.dmp

Filesize
1024KB

Download
memory/2316-3-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/2316-4-0x0000000000400000-0x00000000008EE000-memory.dmp

Filesize
4.9MB

Download
memory/2316-7-0x0000000000400000-0x00000000008EE000-memory.dmp

Filesize
4.9MB

Download
memory/2316-8-0x0000000000A20000-0x0000000000B20000-memory.dmp

Filesize
1024KB

Download
memory/2628-11-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2628-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2628-14-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2628-20-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2628-21-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2628-22-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2728-16-0x0000000000400000-0x00000000008EE000-memory.dmp

Filesize
4.9MB

Download
memory/2728-17-0x0000000000400000-0x00000000008EE000-memory.dmp

Filesize
4.9MB

Download
memory/2728-10-0x0000000000A90000-0x0000000000B90000-memory.dmp

Filesize
1024KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads