tofsee | edf98c8d92926d258cf70c2348ab4c68d31b377cd273b0686f12e3545089030b

Analysis

max time kernel
116s
max time network
125s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
16-05-2024 23:05

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

8245c3b357c4dfcce7e058464c58c5fe.exe
Size

99KB
MD5

8245c3b357c4dfcce7e058464c58c5fe
SHA1

82c5f666ac6e8ef1f886c058d3761c50d9b90567
SHA256

d5f21ec21489e4ec2809672b6981fb9b21dca30952fb1ed18a0907b54912aa9e
SHA512

f489655ee4cbc5f16ce0d1ba2dda8ad9fd58ff8d0f48631a44d8a6f07d8988995026cc455107a17ad34230eb3dd8f1fd4c1450e45573d51f4304311aba027c6b
SSDEEP

1536:RWpoiWXY7wb9Zn6jhKV53LuHxp4mmkrkrTpwJx2FrNSjlxVgpo:4dWxj6AV53Lu0mmkrCwR9

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\wiuuvoft = "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

2652 netsh.exe

pid	process
2652	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\wiuuvoft\ImagePath = "C:\\Windows\\SysWOW64\\wiuuvoft\\iuvpkghe.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

2496 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

iuvpkghe.exe

pid process

2512 iuvpkghe.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

iuvpkghe.exe

description pid process target process

PID 2512 set thread context of 2496 2512 iuvpkghe.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

2680 sc.exe
2524 sc.exe
2620 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
2496	svchost.exe

pid	process
2512	iuvpkghe.exe

description	pid	process	target process
PID 2512 set thread context of 2496	2512	iuvpkghe.exe	svchost.exe

pid	process
2680	sc.exe
2524	sc.exe
2620	sc.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

8245c3b357c4dfcce7e058464c58c5fe.exeiuvpkghe.exe

description	pid	process	target process
PID 1612 wrote to memory of 2084	1612	8245c3b357c4dfcce7e058464c58c5fe.exe	cmd.exe
PID 1612 wrote to memory of 2084	1612	8245c3b357c4dfcce7e058464c58c5fe.exe	cmd.exe
PID 1612 wrote to memory of 2084	1612	8245c3b357c4dfcce7e058464c58c5fe.exe	cmd.exe
PID 1612 wrote to memory of 2084	1612	8245c3b357c4dfcce7e058464c58c5fe.exe	cmd.exe
PID 1612 wrote to memory of 2252	1612	8245c3b357c4dfcce7e058464c58c5fe.exe	cmd.exe
PID 1612 wrote to memory of 2252	1612	8245c3b357c4dfcce7e058464c58c5fe.exe	cmd.exe
PID 1612 wrote to memory of 2252	1612	8245c3b357c4dfcce7e058464c58c5fe.exe	cmd.exe
PID 1612 wrote to memory of 2252	1612	8245c3b357c4dfcce7e058464c58c5fe.exe	cmd.exe
PID 1612 wrote to memory of 2680	1612	8245c3b357c4dfcce7e058464c58c5fe.exe	sc.exe
PID 1612 wrote to memory of 2680	1612	8245c3b357c4dfcce7e058464c58c5fe.exe	sc.exe
PID 1612 wrote to memory of 2680	1612	8245c3b357c4dfcce7e058464c58c5fe.exe	sc.exe
PID 1612 wrote to memory of 2680	1612	8245c3b357c4dfcce7e058464c58c5fe.exe	sc.exe
PID 1612 wrote to memory of 2524	1612	8245c3b357c4dfcce7e058464c58c5fe.exe	sc.exe
PID 1612 wrote to memory of 2524	1612	8245c3b357c4dfcce7e058464c58c5fe.exe	sc.exe
PID 1612 wrote to memory of 2524	1612	8245c3b357c4dfcce7e058464c58c5fe.exe	sc.exe
PID 1612 wrote to memory of 2524	1612	8245c3b357c4dfcce7e058464c58c5fe.exe	sc.exe
PID 1612 wrote to memory of 2620	1612	8245c3b357c4dfcce7e058464c58c5fe.exe	sc.exe
PID 1612 wrote to memory of 2620	1612	8245c3b357c4dfcce7e058464c58c5fe.exe	sc.exe
PID 1612 wrote to memory of 2620	1612	8245c3b357c4dfcce7e058464c58c5fe.exe	sc.exe
PID 1612 wrote to memory of 2620	1612	8245c3b357c4dfcce7e058464c58c5fe.exe	sc.exe
PID 1612 wrote to memory of 2652	1612	8245c3b357c4dfcce7e058464c58c5fe.exe	netsh.exe
PID 1612 wrote to memory of 2652	1612	8245c3b357c4dfcce7e058464c58c5fe.exe	netsh.exe
PID 1612 wrote to memory of 2652	1612	8245c3b357c4dfcce7e058464c58c5fe.exe	netsh.exe
PID 1612 wrote to memory of 2652	1612	8245c3b357c4dfcce7e058464c58c5fe.exe	netsh.exe
PID 2512 wrote to memory of 2496	2512	iuvpkghe.exe	svchost.exe
PID 2512 wrote to memory of 2496	2512	iuvpkghe.exe	svchost.exe
PID 2512 wrote to memory of 2496	2512	iuvpkghe.exe	svchost.exe
PID 2512 wrote to memory of 2496	2512	iuvpkghe.exe	svchost.exe
PID 2512 wrote to memory of 2496	2512	iuvpkghe.exe	svchost.exe
PID 2512 wrote to memory of 2496	2512	iuvpkghe.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\8245c3b357c4dfcce7e058464c58c5fe.exe
"C:\Users\Admin\AppData\Local\Temp\8245c3b357c4dfcce7e058464c58c5fe.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1612

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\wiuuvoft\
2⤵
PID:2084

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\iuvpkghe.exe" C:\Windows\SysWOW64\wiuuvoft\
2⤵
PID:2252

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create wiuuvoft binPath= "C:\Windows\SysWOW64\wiuuvoft\iuvpkghe.exe /d\"C:\Users\Admin\AppData\Local\Temp\8245c3b357c4dfcce7e058464c58c5fe.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 wiuuvoft "wifi internet conection"
2⤵
- Launches sc.exe
PID:2524

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start wiuuvoft
2⤵
- Launches sc.exe
PID:2620

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:2652

C:\Windows\SysWOW64\wiuuvoft\iuvpkghe.exe
C:\Windows\SysWOW64\wiuuvoft\iuvpkghe.exe /d"C:\Users\Admin\AppData\Local\Temp\8245c3b357c4dfcce7e058464c58c5fe.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2512

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Windows security bypass
- Sets service image path in registry
- Deletes itself
PID:2496

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

System Services

T1569

Service Execution

T1569.002

Persistence

Create or Modify System Process

T1543

Windows Service

T1543.003

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Create or Modify System Process

T1543

Windows Service

T1543.003

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Disable or Modify System Firewall

T1562.004

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\iuvpkghe.exe
Filesize
13.3MB

MD5
c62fca64a8f9e23e83728bc35025a1de

SHA1
4a7d0b263f3764c8a8558564e2093765bc6f635b

SHA256
e74d25ad729e6322931cd1fd877e18f775dda02bf669aac0381b2c76727f70c3

SHA512
e241398a8c46e20621eb4fa2d0e4c36ec0b2b04398945a3dcd088c12a0c3ed06dfb77f530b29afb3ac112307149edd360adad54e01fb44d5c5cb7463460eec75

Download Submit
memory/1612-2-0x0000000000020000-0x0000000000021000-memory.dmp

Filesize
4KB

Download
memory/1612-1-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/1612-0-0x00000000008F0000-0x00000000008F1000-memory.dmp

Filesize
4KB

Download
memory/1612-5-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/2496-13-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2496-11-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2496-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2496-8-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2496-15-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2512-7-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/2512-14-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download