tofsee | c30132d930b44ed9f7cbb78be47c9c3fb0bd0d34c3e0548304802c7c617cd185

General

Target

file.exe
Size

268KB
MD5

9b30c442d1e5f79e00beb59519f49bf1
SHA1

e3f97e75276ba3b4756275bc1796396369b07b68
SHA256

c30132d930b44ed9f7cbb78be47c9c3fb0bd0d34c3e0548304802c7c617cd185
SHA512

931b892d036c75da6b8a7aeeb282e21d7715c52a2ab3a5636e38ddffadcb9be1261a26c7ae4407964d29c7caac526ec963fcc75cb3b76bf21ff3fb41b3dee931
SSDEEP

3072:JoB1eK1AKuLq7ITFIiAq4pe5/kdg82Pd+YzF+UFOFQh91ESuPjco5E5WqFmcJObK:GB1IKuLiITpAqHFo0+oOFO7BI5qFBSw

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\scfdgiti = "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

1984 netsh.exe

pid	process
1984	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\scfdgiti\ImagePath = "C:\\Windows\\SysWOW64\\scfdgiti\\oeebnzpn.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

1444 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

oeebnzpn.exe

pid process

1048 oeebnzpn.exe
Drops file in System32 directory 1 IoCs

Processes:

svchost.exe

description ioc process

File created C:\Windows\SysWOW64\config\systemprofile:.repos svchost.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

oeebnzpn.exe

description pid process target process

PID 1048 set thread context of 1444 1048 oeebnzpn.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

1724 sc.exe
556 sc.exe
428 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
1444	svchost.exe

pid	process
1048	oeebnzpn.exe

description	ioc	process
File created	C:\Windows\SysWOW64\config\systemprofile:.repos	svchost.exe

description	pid	process	target process
PID 1048 set thread context of 1444	1048	oeebnzpn.exe	svchost.exe

pid	process
1724	sc.exe
556	sc.exe
428	sc.exe

Modifies data under HKEY_USERS 2 IoCs

Processes:

svchost.exe

description	ioc	process
Key created	\REGISTRY\USER\.DEFAULT\Control Panel\Buses	svchost.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Control Panel\Buses\Config0 = 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	svchost.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

file.exeoeebnzpn.exe

description	pid	process	target process
PID 1232 wrote to memory of 1236	1232	file.exe	cmd.exe
PID 1232 wrote to memory of 1236	1232	file.exe	cmd.exe
PID 1232 wrote to memory of 1236	1232	file.exe	cmd.exe
PID 1232 wrote to memory of 1236	1232	file.exe	cmd.exe
PID 1232 wrote to memory of 1484	1232	file.exe	cmd.exe
PID 1232 wrote to memory of 1484	1232	file.exe	cmd.exe
PID 1232 wrote to memory of 1484	1232	file.exe	cmd.exe
PID 1232 wrote to memory of 1484	1232	file.exe	cmd.exe
PID 1232 wrote to memory of 1724	1232	file.exe	sc.exe
PID 1232 wrote to memory of 1724	1232	file.exe	sc.exe
PID 1232 wrote to memory of 1724	1232	file.exe	sc.exe
PID 1232 wrote to memory of 1724	1232	file.exe	sc.exe
PID 1232 wrote to memory of 556	1232	file.exe	sc.exe
PID 1232 wrote to memory of 556	1232	file.exe	sc.exe
PID 1232 wrote to memory of 556	1232	file.exe	sc.exe
PID 1232 wrote to memory of 556	1232	file.exe	sc.exe
PID 1232 wrote to memory of 428	1232	file.exe	sc.exe
PID 1232 wrote to memory of 428	1232	file.exe	sc.exe
PID 1232 wrote to memory of 428	1232	file.exe	sc.exe
PID 1232 wrote to memory of 428	1232	file.exe	sc.exe
PID 1232 wrote to memory of 1984	1232	file.exe	netsh.exe
PID 1232 wrote to memory of 1984	1232	file.exe	netsh.exe
PID 1232 wrote to memory of 1984	1232	file.exe	netsh.exe
PID 1232 wrote to memory of 1984	1232	file.exe	netsh.exe
PID 1048 wrote to memory of 1444	1048	oeebnzpn.exe	svchost.exe
PID 1048 wrote to memory of 1444	1048	oeebnzpn.exe	svchost.exe
PID 1048 wrote to memory of 1444	1048	oeebnzpn.exe	svchost.exe
PID 1048 wrote to memory of 1444	1048	oeebnzpn.exe	svchost.exe
PID 1048 wrote to memory of 1444	1048	oeebnzpn.exe	svchost.exe
PID 1048 wrote to memory of 1444	1048	oeebnzpn.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1232
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\scfdgiti\
  2⤵
  PID:1236
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\oeebnzpn.exe" C:\Windows\SysWOW64\scfdgiti\
  2⤵
  PID:1484
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create scfdgiti binPath= "C:\Windows\SysWOW64\scfdgiti\oeebnzpn.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:1724
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description scfdgiti "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:556
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start scfdgiti
  2⤵
  - Launches sc.exe
  PID:428
- 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:1984

C:\Windows\SysWOW64\scfdgiti\oeebnzpn.exe
C:\Windows\SysWOW64\scfdgiti\oeebnzpn.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1048
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Windows security bypass
  - Sets service image path in registry
  - Deletes itself
  - Drops file in System32 directory
  - Modifies data under HKEY_USERS
  PID:1444

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Modify Existing Service

New Service

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

New Service

1

T1050

Defense Evasion

Disabling Security Tools

Modify Registry

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
10.3MB

MD5
b7078c8686d33fceb452647e9c31e655

SHA1
912ebaad8f1b766601c3eaf9aa45607f7a52317a

SHA256
d387504746f1bee010853cda4741f6328189c323a9e1de31524fc09524cd4861

SHA512
3dbdac558fe80d171eb2d1cd71c2490caf21cc0e060c0a1108871eb047c8a302889ce169e2248cbb91021991060d57e6c6d4a7ab147cc9073e60606378a2b0c1

Download Submit
C:\Windows\SysWOW64\scfdgiti\oeebnzpn.exe

Filesize
10.3MB

MD5
b7078c8686d33fceb452647e9c31e655

SHA1
912ebaad8f1b766601c3eaf9aa45607f7a52317a

SHA256
d387504746f1bee010853cda4741f6328189c323a9e1de31524fc09524cd4861

SHA512
3dbdac558fe80d171eb2d1cd71c2490caf21cc0e060c0a1108871eb047c8a302889ce169e2248cbb91021991060d57e6c6d4a7ab147cc9073e60606378a2b0c1

Download Submit
memory/1048-64-0x0000000000400000-0x0000000000908000-memory.dmp

Filesize
5.0MB

Download
memory/1232-56-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/1232-60-0x0000000000400000-0x0000000000908000-memory.dmp

Filesize
5.0MB

Download
memory/1444-62-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1444-61-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1444-63-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1444-67-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1444-68-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1444-69-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1444-70-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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