tofsee | 4ffd8a5153b680b86b258bde87319885182c5e078cc0c0b16ab64009f7c69979

General

Target

file.exe
Size

276KB
MD5

8861c3fedd83a41ca2637215c3bea553
SHA1

9394b1527afa8de77c962e0895c681819cb2a529
SHA256

4ffd8a5153b680b86b258bde87319885182c5e078cc0c0b16ab64009f7c69979
SHA512

f1e21803aee16d146737284e491685e084b3d0a65e42986d4a4c5233f4860d309e7aa12cd8516baca7ad9384dd8ac43f67fdd2866e7e4b453b184e458eb87653
SSDEEP

3072:exZL86CsL1KL6+tq5qt0OETP2F4HaNMX027CP1JTJbLCrhIh3eGjMgG1ao5Lk:NVsLML6+nt07J8OrOHNPSuRjMgU

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

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\xaiitnqp = "0"	svchost.exe

Creates new service(s) 1 TTPs
persistence

New Service
T1050
Executes dropped EXE 1 IoCs

Processes:

hkteeaax.exe

pid process

1764 hkteeaax.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

1748 netsh.exe

pid	process
1764	hkteeaax.exe

pid	process
1748	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\xaiitnqp\ImagePath = "C:\\Windows\\SysWOW64\\xaiitnqp\\hkteeaax.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

1856 svchost.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

hkteeaax.exe

description pid process target process

PID 1764 set thread context of 1856 1764 hkteeaax.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

1416 sc.exe
1092 sc.exe
1120 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

pid	process
1856	svchost.exe

description	pid	process	target process
PID 1764 set thread context of 1856	1764	hkteeaax.exe	svchost.exe

pid	process
1416	sc.exe
1092	sc.exe
1120	sc.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

file.exehkteeaax.exe

description	pid	process	target process
PID 1752 wrote to memory of 1860	1752	file.exe	cmd.exe
PID 1752 wrote to memory of 1860	1752	file.exe	cmd.exe
PID 1752 wrote to memory of 1860	1752	file.exe	cmd.exe
PID 1752 wrote to memory of 1860	1752	file.exe	cmd.exe
PID 1752 wrote to memory of 1528	1752	file.exe	cmd.exe
PID 1752 wrote to memory of 1528	1752	file.exe	cmd.exe
PID 1752 wrote to memory of 1528	1752	file.exe	cmd.exe
PID 1752 wrote to memory of 1528	1752	file.exe	cmd.exe
PID 1752 wrote to memory of 1416	1752	file.exe	sc.exe
PID 1752 wrote to memory of 1416	1752	file.exe	sc.exe
PID 1752 wrote to memory of 1416	1752	file.exe	sc.exe
PID 1752 wrote to memory of 1416	1752	file.exe	sc.exe
PID 1752 wrote to memory of 1092	1752	file.exe	sc.exe
PID 1752 wrote to memory of 1092	1752	file.exe	sc.exe
PID 1752 wrote to memory of 1092	1752	file.exe	sc.exe
PID 1752 wrote to memory of 1092	1752	file.exe	sc.exe
PID 1752 wrote to memory of 1120	1752	file.exe	sc.exe
PID 1752 wrote to memory of 1120	1752	file.exe	sc.exe
PID 1752 wrote to memory of 1120	1752	file.exe	sc.exe
PID 1752 wrote to memory of 1120	1752	file.exe	sc.exe
PID 1752 wrote to memory of 1748	1752	file.exe	netsh.exe
PID 1752 wrote to memory of 1748	1752	file.exe	netsh.exe
PID 1752 wrote to memory of 1748	1752	file.exe	netsh.exe
PID 1752 wrote to memory of 1748	1752	file.exe	netsh.exe
PID 1764 wrote to memory of 1856	1764	hkteeaax.exe	svchost.exe
PID 1764 wrote to memory of 1856	1764	hkteeaax.exe	svchost.exe
PID 1764 wrote to memory of 1856	1764	hkteeaax.exe	svchost.exe
PID 1764 wrote to memory of 1856	1764	hkteeaax.exe	svchost.exe
PID 1764 wrote to memory of 1856	1764	hkteeaax.exe	svchost.exe
PID 1764 wrote to memory of 1856	1764	hkteeaax.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:1752

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\xaiitnqp\
2⤵
PID:1860

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\hkteeaax.exe" C:\Windows\SysWOW64\xaiitnqp\
2⤵
PID:1528

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create xaiitnqp binPath= "C:\Windows\SysWOW64\xaiitnqp\hkteeaax.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:1416

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description xaiitnqp "wifi internet conection"
2⤵
- Launches sc.exe
PID:1092

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start xaiitnqp
2⤵
- Launches sc.exe
PID:1120

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:1748

C:\Windows\SysWOW64\xaiitnqp\hkteeaax.exe
C:\Windows\SysWOW64\xaiitnqp\hkteeaax.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1764

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Windows security bypass
- Sets service image path in registry
- Deletes itself
PID:1856

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\hkteeaax.exe
Filesize
14.4MB

MD5
dbb395d753333a068810ac57d8ce01ec

SHA1
b98cad2fd649040ef1c2584a0a4283b0245cc595

SHA256
e8422ca305bd7fc41e06f68d60a466d21e41989e122248598a2baa59aa271126

SHA512
df7281cac9bf0d4e0328d0b40e94b4b4a54f9597c50a995a6efc664ea609f1a291b015b0e7852a6f3ba09a60e953cc60753d9e3dd8c77d33740765e4869fac7b

Download Submit
C:\Windows\SysWOW64\xaiitnqp\hkteeaax.exe
Filesize
14.4MB

MD5
dbb395d753333a068810ac57d8ce01ec

SHA1
b98cad2fd649040ef1c2584a0a4283b0245cc595

SHA256
e8422ca305bd7fc41e06f68d60a466d21e41989e122248598a2baa59aa271126

SHA512
df7281cac9bf0d4e0328d0b40e94b4b4a54f9597c50a995a6efc664ea609f1a291b015b0e7852a6f3ba09a60e953cc60753d9e3dd8c77d33740765e4869fac7b

Download Submit
memory/1092-62-0x0000000000000000-mapping.dmp

Download
memory/1120-63-0x0000000000000000-mapping.dmp

Download
memory/1416-61-0x0000000000000000-mapping.dmp

Download
memory/1528-59-0x0000000000000000-mapping.dmp

Download
memory/1748-64-0x0000000000000000-mapping.dmp

Download
memory/1752-55-0x000000000057A000-0x000000000058F000-memory.dmp

Filesize
84KB

Download
memory/1752-56-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/1752-54-0x0000000076681000-0x0000000076683000-memory.dmp

Filesize
8KB

Download
memory/1752-65-0x000000000057A000-0x000000000058F000-memory.dmp

Filesize
84KB

Download
memory/1752-66-0x0000000000400000-0x000000000044A000-memory.dmp

Filesize
296KB

Download
memory/1752-57-0x0000000000400000-0x000000000044A000-memory.dmp

Filesize
296KB

Download
memory/1764-74-0x000000000026A000-0x000000000027F000-memory.dmp

Filesize
84KB

Download
memory/1764-77-0x0000000000400000-0x000000000044A000-memory.dmp

Filesize
296KB

Download
memory/1856-71-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/1856-72-0x00000000000C9A6B-mapping.dmp

Download
memory/1856-69-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/1856-78-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/1856-80-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/1860-58-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

Loading Replay Monitor...

Downloads