tofsee | edf98c8d92926d258cf70c2348ab4c68d31b377cd273b0686f12e3545089030b

Analysis

max time kernel
145s
max time network
124s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
16-05-2024 23:05

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General

Target

20de026bf4998364c894a00f7a97df60.exe
Size

99KB
MD5

20de026bf4998364c894a00f7a97df60
SHA1

9db4857e4894082aa77c5f5b82009f2028f8fc51
SHA256

7f8cb81aabb63a3bb8806b9c055582bec59ef104362316dc164dd686128b9246
SHA512

10894d234217ba24391d5de14e40908cfb13ae367e943b34fafad9c6bd5caa937501f1db04ee43127171d40d7d185fa09cf3de8f765b89aa706272ee6c0596dc
SSDEEP

1536:R33ZAoU8Ed7fzXfQFlj8+6a+Vpvy/eKaO/VChHWNvw0+pDi8P19Exk:hZ3EZf6A+6a+Vpvy/ead22KHDDPEa

Score

10^/10

tofsee evasion execution persistence trojan

Malware Config

Extracted

Family

tofsee

43.231.4.7

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

Processes:

svchost.exe

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

Creates new service(s) 2 TTPs
persistence execution

Windows Service
T1543.003

Service Execution
T1569.002
Modifies Windows Firewall 2 TTPs 1 IoCs
evasion

Windows Service
T1543.003

Disable or Modify System Firewall
T1562.004

Processes:

netsh.exe

pid process

3036 netsh.exe

pid	process
3036	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\aaeobtuy\ImagePath = "C:\\Windows\\SysWOW64\\aaeobtuy\\wvhdiscp.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

2720 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

wvhdiscp.exe

pid process

2728 wvhdiscp.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

wvhdiscp.exe

description pid process target process

PID 2728 set thread context of 2720 2728 wvhdiscp.exe svchost.exe
Launches sc.exe 3 IoCs
Sc.exe is a Windows utlilty to control services on the system.

Processes:

sc.exesc.exesc.exe

pid process

2616 sc.exe
2748 sc.exe
2660 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
2720	svchost.exe

pid	process
2728	wvhdiscp.exe

description	pid	process	target process
PID 2728 set thread context of 2720	2728	wvhdiscp.exe	svchost.exe

pid	process
2616	sc.exe
2748	sc.exe
2660	sc.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

20de026bf4998364c894a00f7a97df60.exewvhdiscp.exe

description	pid	process	target process
PID 1684 wrote to memory of 2148	1684	20de026bf4998364c894a00f7a97df60.exe	cmd.exe
PID 1684 wrote to memory of 2148	1684	20de026bf4998364c894a00f7a97df60.exe	cmd.exe
PID 1684 wrote to memory of 2148	1684	20de026bf4998364c894a00f7a97df60.exe	cmd.exe
PID 1684 wrote to memory of 2148	1684	20de026bf4998364c894a00f7a97df60.exe	cmd.exe
PID 1684 wrote to memory of 2320	1684	20de026bf4998364c894a00f7a97df60.exe	cmd.exe
PID 1684 wrote to memory of 2320	1684	20de026bf4998364c894a00f7a97df60.exe	cmd.exe
PID 1684 wrote to memory of 2320	1684	20de026bf4998364c894a00f7a97df60.exe	cmd.exe
PID 1684 wrote to memory of 2320	1684	20de026bf4998364c894a00f7a97df60.exe	cmd.exe
PID 1684 wrote to memory of 2616	1684	20de026bf4998364c894a00f7a97df60.exe	sc.exe
PID 1684 wrote to memory of 2616	1684	20de026bf4998364c894a00f7a97df60.exe	sc.exe
PID 1684 wrote to memory of 2616	1684	20de026bf4998364c894a00f7a97df60.exe	sc.exe
PID 1684 wrote to memory of 2616	1684	20de026bf4998364c894a00f7a97df60.exe	sc.exe
PID 1684 wrote to memory of 2748	1684	20de026bf4998364c894a00f7a97df60.exe	sc.exe
PID 1684 wrote to memory of 2748	1684	20de026bf4998364c894a00f7a97df60.exe	sc.exe
PID 1684 wrote to memory of 2748	1684	20de026bf4998364c894a00f7a97df60.exe	sc.exe
PID 1684 wrote to memory of 2748	1684	20de026bf4998364c894a00f7a97df60.exe	sc.exe
PID 1684 wrote to memory of 2660	1684	20de026bf4998364c894a00f7a97df60.exe	sc.exe
PID 1684 wrote to memory of 2660	1684	20de026bf4998364c894a00f7a97df60.exe	sc.exe
PID 1684 wrote to memory of 2660	1684	20de026bf4998364c894a00f7a97df60.exe	sc.exe
PID 1684 wrote to memory of 2660	1684	20de026bf4998364c894a00f7a97df60.exe	sc.exe
PID 2728 wrote to memory of 2720	2728	wvhdiscp.exe	svchost.exe
PID 2728 wrote to memory of 2720	2728	wvhdiscp.exe	svchost.exe
PID 2728 wrote to memory of 2720	2728	wvhdiscp.exe	svchost.exe
PID 2728 wrote to memory of 2720	2728	wvhdiscp.exe	svchost.exe
PID 2728 wrote to memory of 2720	2728	wvhdiscp.exe	svchost.exe
PID 2728 wrote to memory of 2720	2728	wvhdiscp.exe	svchost.exe
PID 1684 wrote to memory of 3036	1684	20de026bf4998364c894a00f7a97df60.exe	netsh.exe
PID 1684 wrote to memory of 3036	1684	20de026bf4998364c894a00f7a97df60.exe	netsh.exe
PID 1684 wrote to memory of 3036	1684	20de026bf4998364c894a00f7a97df60.exe	netsh.exe
PID 1684 wrote to memory of 3036	1684	20de026bf4998364c894a00f7a97df60.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\20de026bf4998364c894a00f7a97df60.exe
"C:\Users\Admin\AppData\Local\Temp\20de026bf4998364c894a00f7a97df60.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1684
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\aaeobtuy\
  2⤵
  PID:2148
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\wvhdiscp.exe" C:\Windows\SysWOW64\aaeobtuy\
  2⤵
  PID:2320
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create aaeobtuy binPath= "C:\Windows\SysWOW64\aaeobtuy\wvhdiscp.exe /d\"C:\Users\Admin\AppData\Local\Temp\20de026bf4998364c894a00f7a97df60.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:2616
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description aaeobtuy "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:2748
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start aaeobtuy
  2⤵
  - Launches sc.exe
  PID:2660
- 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:3036

C:\Windows\SysWOW64\aaeobtuy\wvhdiscp.exe
C:\Windows\SysWOW64\aaeobtuy\wvhdiscp.exe /d"C:\Users\Admin\AppData\Local\Temp\20de026bf4998364c894a00f7a97df60.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:2720

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

T1569

Service Execution

T1569.002

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 System Firewall

T1562.004

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
10.2MB

MD5
b965b012a0c223b85827d3f25e6e9f36

SHA1
dbfc39d06516fc112923efba18c189199f8387df

SHA256
98bef3d61a3d59e8118d232985724fce2e4672d8197b8f9b477a3fc31645ff7c

SHA512
f5ad901fa9cafdce2df6cd29b073c813743d5d359b0932248892420f3deab38231de743df0db06ea056b616cfa9acf2f6fad59c30a2c0bff9170174019ef9ad0

Download Submit
memory/1684-2-0x0000000000020000-0x0000000000021000-memory.dmp

Filesize
4KB

Download
memory/1684-1-0x0000000000510000-0x0000000000511000-memory.dmp

Filesize
4KB

Download
memory/1684-0-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/1684-13-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/2720-10-0x00000000000D0000-0x00000000000E5000-memory.dmp

Filesize
84KB

Download
memory/2720-9-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2720-7-0x00000000000D0000-0x00000000000E5000-memory.dmp

Filesize
84KB

Download
memory/2720-14-0x00000000000D0000-0x00000000000E5000-memory.dmp

Filesize
84KB

Download
memory/2720-15-0x00000000000D0000-0x00000000000E5000-memory.dmp

Filesize
84KB

Download
memory/2728-6-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/2728-12-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download