tofsee | 25ed67b390cafbd1ebcebed4c9cad13c38e6998c45e501e23d6652ac04bb69ef

General

Target

097bc3c7d6f6f50a503fdb7a56e22a34.exe
Size

312KB
MD5

097bc3c7d6f6f50a503fdb7a56e22a34
SHA1

bc801204c76b73ee9e66a9a7bdffd856965604e0
SHA256

25ed67b390cafbd1ebcebed4c9cad13c38e6998c45e501e23d6652ac04bb69ef
SHA512

7dedbefbe0a0af1d1541374a1a8916eb45d6037c15b8ae36ed28c4dfc0a9d22f5062b584b856b8d32cf5d675f1a718b31b029dc5abcea4c40d8925ae42f05eea
SSDEEP

3072:6AX8ODio3+FCLQbFK+OCQ/KbqAjxBn7UJIdg6hO3Vd+eVRg/5wcw3P3XqT:vPDl5L0FKBDKbzBYd6upvG

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

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

Disabling Security Tools

T1089

Modify Registry

T1112

Processes:

svchost.exe

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

Creates new service(s) 1 TTPs
persistence

New Service
T1050
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

1424 netsh.exe

pid	process
1424	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

svchost.exe

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

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

1620 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

szcxwqqk.exe

pid process

1516 szcxwqqk.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

szcxwqqk.exe

description pid process target process

PID 1516 set thread context of 1620 1516 szcxwqqk.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

432 sc.exe
612 sc.exe
1504 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
1620	svchost.exe

pid	process
1516	szcxwqqk.exe

description	pid	process	target process
PID 1516 set thread context of 1620	1516	szcxwqqk.exe	svchost.exe

pid	process
432	sc.exe
612	sc.exe
1504	sc.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

097bc3c7d6f6f50a503fdb7a56e22a34.exeszcxwqqk.exe

description	pid	process	target process
PID 2012 wrote to memory of 1904	2012	097bc3c7d6f6f50a503fdb7a56e22a34.exe	cmd.exe
PID 2012 wrote to memory of 1904	2012	097bc3c7d6f6f50a503fdb7a56e22a34.exe	cmd.exe
PID 2012 wrote to memory of 1904	2012	097bc3c7d6f6f50a503fdb7a56e22a34.exe	cmd.exe
PID 2012 wrote to memory of 1904	2012	097bc3c7d6f6f50a503fdb7a56e22a34.exe	cmd.exe
PID 2012 wrote to memory of 1452	2012	097bc3c7d6f6f50a503fdb7a56e22a34.exe	cmd.exe
PID 2012 wrote to memory of 1452	2012	097bc3c7d6f6f50a503fdb7a56e22a34.exe	cmd.exe
PID 2012 wrote to memory of 1452	2012	097bc3c7d6f6f50a503fdb7a56e22a34.exe	cmd.exe
PID 2012 wrote to memory of 1452	2012	097bc3c7d6f6f50a503fdb7a56e22a34.exe	cmd.exe
PID 2012 wrote to memory of 432	2012	097bc3c7d6f6f50a503fdb7a56e22a34.exe	sc.exe
PID 2012 wrote to memory of 432	2012	097bc3c7d6f6f50a503fdb7a56e22a34.exe	sc.exe
PID 2012 wrote to memory of 432	2012	097bc3c7d6f6f50a503fdb7a56e22a34.exe	sc.exe
PID 2012 wrote to memory of 432	2012	097bc3c7d6f6f50a503fdb7a56e22a34.exe	sc.exe
PID 2012 wrote to memory of 612	2012	097bc3c7d6f6f50a503fdb7a56e22a34.exe	sc.exe
PID 2012 wrote to memory of 612	2012	097bc3c7d6f6f50a503fdb7a56e22a34.exe	sc.exe
PID 2012 wrote to memory of 612	2012	097bc3c7d6f6f50a503fdb7a56e22a34.exe	sc.exe
PID 2012 wrote to memory of 612	2012	097bc3c7d6f6f50a503fdb7a56e22a34.exe	sc.exe
PID 2012 wrote to memory of 1504	2012	097bc3c7d6f6f50a503fdb7a56e22a34.exe	sc.exe
PID 2012 wrote to memory of 1504	2012	097bc3c7d6f6f50a503fdb7a56e22a34.exe	sc.exe
PID 2012 wrote to memory of 1504	2012	097bc3c7d6f6f50a503fdb7a56e22a34.exe	sc.exe
PID 2012 wrote to memory of 1504	2012	097bc3c7d6f6f50a503fdb7a56e22a34.exe	sc.exe
PID 2012 wrote to memory of 1424	2012	097bc3c7d6f6f50a503fdb7a56e22a34.exe	netsh.exe
PID 2012 wrote to memory of 1424	2012	097bc3c7d6f6f50a503fdb7a56e22a34.exe	netsh.exe
PID 2012 wrote to memory of 1424	2012	097bc3c7d6f6f50a503fdb7a56e22a34.exe	netsh.exe
PID 2012 wrote to memory of 1424	2012	097bc3c7d6f6f50a503fdb7a56e22a34.exe	netsh.exe
PID 1516 wrote to memory of 1620	1516	szcxwqqk.exe	svchost.exe
PID 1516 wrote to memory of 1620	1516	szcxwqqk.exe	svchost.exe
PID 1516 wrote to memory of 1620	1516	szcxwqqk.exe	svchost.exe
PID 1516 wrote to memory of 1620	1516	szcxwqqk.exe	svchost.exe
PID 1516 wrote to memory of 1620	1516	szcxwqqk.exe	svchost.exe
PID 1516 wrote to memory of 1620	1516	szcxwqqk.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\097bc3c7d6f6f50a503fdb7a56e22a34.exe
"C:\Users\Admin\AppData\Local\Temp\097bc3c7d6f6f50a503fdb7a56e22a34.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2012

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\emhoegnw\
2⤵
PID:1904

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\szcxwqqk.exe" C:\Windows\SysWOW64\emhoegnw\
2⤵
PID:1452

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create emhoegnw binPath= "C:\Windows\SysWOW64\emhoegnw\szcxwqqk.exe /d\"C:\Users\Admin\AppData\Local\Temp\097bc3c7d6f6f50a503fdb7a56e22a34.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:432

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description emhoegnw "wifi internet conection"
2⤵
- Launches sc.exe
PID:612

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start emhoegnw
2⤵
- Launches sc.exe
PID:1504

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:1424

C:\Windows\SysWOW64\emhoegnw\szcxwqqk.exe
C:\Windows\SysWOW64\emhoegnw\szcxwqqk.exe /d"C:\Users\Admin\AppData\Local\Temp\097bc3c7d6f6f50a503fdb7a56e22a34.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1516

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Windows security bypass
- Sets service image path in registry
- Deletes itself
PID:1620

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

New Service

1

T1050

Modify Existing Service

1

T1031

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

New Service

1

T1050

Defense Evasion

Disabling Security Tools

1

T1089

Modify Registry

2

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\szcxwqqk.exe
Filesize
11.1MB

MD5
b3d9f19a723b0c068fe2fc75ab047f6a

SHA1
fef2e9206f4f3709159570f9fcd4ba10e60dba2d

SHA256
d3595336123a8838d49ff30c6cfde5e3cc3b4f8f25c4918b852b84458ff5189d

SHA512
ea6e05ea4a26dd1e487015924c5b4132500324f7b89c6820bc9800901bfb81bc767ccbaa2941d7fd3a8d9f651b79ceb38d3a091341443ef428abb2b695a296cd

Download Submit
C:\Windows\SysWOW64\emhoegnw\szcxwqqk.exe
Filesize
11.1MB

MD5
b3d9f19a723b0c068fe2fc75ab047f6a

SHA1
fef2e9206f4f3709159570f9fcd4ba10e60dba2d

SHA256
d3595336123a8838d49ff30c6cfde5e3cc3b4f8f25c4918b852b84458ff5189d

SHA512
ea6e05ea4a26dd1e487015924c5b4132500324f7b89c6820bc9800901bfb81bc767ccbaa2941d7fd3a8d9f651b79ceb38d3a091341443ef428abb2b695a296cd

Download Submit
memory/1516-65-0x0000000000400000-0x00000000006E9000-memory.dmp

Filesize
2.9MB

Download
memory/1620-61-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1620-62-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1620-63-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1620-67-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1620-68-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1620-69-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1620-70-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2012-56-0x00000000002B0000-0x00000000002C3000-memory.dmp

Filesize
76KB

Download
memory/2012-60-0x0000000000400000-0x00000000006E9000-memory.dmp

Filesize
2.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads