tofsee | 585707b6537eb783c58cde2b84c84a7741eb129b885aba9ff7822c2345f39362

General

Target

file.exe
Size

300KB
MD5

fe041a63df2b9558f2247cb6f07f97bf
SHA1

b772f20c7ea8d3655e64717bdc82cbd669d7ef65
SHA256

585707b6537eb783c58cde2b84c84a7741eb129b885aba9ff7822c2345f39362
SHA512

c86151847fc94b2b4bb4b6cfd0aecb78228afd34b2ec3003fa14dcb7d9259ea282e6677e08648f9fd93d273b2cad27742d0da0fd684268fc636ca5b64b609656
SSDEEP

3072:8Lb6bfTL45RmziYvPtd7Sj4yprPD0uQjiMTE59W2Hva5D:4QTL4+Oy7orIuQj9UHva

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\jjdgjvza = "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

1896 netsh.exe

pid	process
1896	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\jjdgjvza\ImagePath = "C:\\Windows\\SysWOW64\\jjdgjvza\\gmetyri.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

728 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

gmetyri.exe

pid process

804 gmetyri.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:

gmetyri.exe

description pid process target process

PID 804 set thread context of 728 804 gmetyri.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

268 sc.exe
1364 sc.exe
1720 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
728	svchost.exe

pid	process
804	gmetyri.exe

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

description	pid	process	target process
PID 804 set thread context of 728	804	gmetyri.exe	svchost.exe

pid	process
268	sc.exe
1364	sc.exe
1720	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.exegmetyri.exe

description	pid	process	target process
PID 1320 wrote to memory of 316	1320	file.exe	cmd.exe
PID 1320 wrote to memory of 316	1320	file.exe	cmd.exe
PID 1320 wrote to memory of 316	1320	file.exe	cmd.exe
PID 1320 wrote to memory of 316	1320	file.exe	cmd.exe
PID 1320 wrote to memory of 432	1320	file.exe	cmd.exe
PID 1320 wrote to memory of 432	1320	file.exe	cmd.exe
PID 1320 wrote to memory of 432	1320	file.exe	cmd.exe
PID 1320 wrote to memory of 432	1320	file.exe	cmd.exe
PID 1320 wrote to memory of 1720	1320	file.exe	sc.exe
PID 1320 wrote to memory of 1720	1320	file.exe	sc.exe
PID 1320 wrote to memory of 1720	1320	file.exe	sc.exe
PID 1320 wrote to memory of 1720	1320	file.exe	sc.exe
PID 1320 wrote to memory of 268	1320	file.exe	sc.exe
PID 1320 wrote to memory of 268	1320	file.exe	sc.exe
PID 1320 wrote to memory of 268	1320	file.exe	sc.exe
PID 1320 wrote to memory of 268	1320	file.exe	sc.exe
PID 1320 wrote to memory of 1364	1320	file.exe	sc.exe
PID 1320 wrote to memory of 1364	1320	file.exe	sc.exe
PID 1320 wrote to memory of 1364	1320	file.exe	sc.exe
PID 1320 wrote to memory of 1364	1320	file.exe	sc.exe
PID 1320 wrote to memory of 1896	1320	file.exe	netsh.exe
PID 1320 wrote to memory of 1896	1320	file.exe	netsh.exe
PID 1320 wrote to memory of 1896	1320	file.exe	netsh.exe
PID 1320 wrote to memory of 1896	1320	file.exe	netsh.exe
PID 804 wrote to memory of 728	804	gmetyri.exe	svchost.exe
PID 804 wrote to memory of 728	804	gmetyri.exe	svchost.exe
PID 804 wrote to memory of 728	804	gmetyri.exe	svchost.exe
PID 804 wrote to memory of 728	804	gmetyri.exe	svchost.exe
PID 804 wrote to memory of 728	804	gmetyri.exe	svchost.exe
PID 804 wrote to memory of 728	804	gmetyri.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:1320
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\jjdgjvza\
  2⤵
  PID:316
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\gmetyri.exe" C:\Windows\SysWOW64\jjdgjvza\
  2⤵
  PID:432
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create jjdgjvza binPath= "C:\Windows\SysWOW64\jjdgjvza\gmetyri.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:1720
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description jjdgjvza "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:268
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start jjdgjvza
  2⤵
  - Launches sc.exe
  PID:1364
- 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:1896

C:\Windows\SysWOW64\jjdgjvza\gmetyri.exe
C:\Windows\SysWOW64\jjdgjvza\gmetyri.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:804
- 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:728

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\gmetyri.exe

Filesize
14.2MB

MD5
ff83c37dcec457b02bb2e29fd3b2b930

SHA1
50c103c4617da38f8a468dd6b056f35110fb38ca

SHA256
3eafdd1b53d3d9384445ca098934f5b13d550b1975edce30cce4041fbc97bd5c

SHA512
9942dd9cc37aa989e856678213d0bfb698f3d099d678797f9b864ac8f59c3106c9ac4c33777958222e3d5ab417081590ce8c4802cfe1dfb0c12dde1557c19f2d

Download Submit
C:\Windows\SysWOW64\jjdgjvza\gmetyri.exe

Filesize
14.2MB

MD5
ff83c37dcec457b02bb2e29fd3b2b930

SHA1
50c103c4617da38f8a468dd6b056f35110fb38ca

SHA256
3eafdd1b53d3d9384445ca098934f5b13d550b1975edce30cce4041fbc97bd5c

SHA512
9942dd9cc37aa989e856678213d0bfb698f3d099d678797f9b864ac8f59c3106c9ac4c33777958222e3d5ab417081590ce8c4802cfe1dfb0c12dde1557c19f2d

Download Submit
memory/268-62-0x0000000000000000-mapping.dmp

Download
memory/316-57-0x0000000000000000-mapping.dmp

Download
memory/432-58-0x0000000000000000-mapping.dmp

Download
memory/728-81-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/728-80-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/728-74-0x0000000000089A6B-mapping.dmp

Download
memory/728-71-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/728-73-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/804-79-0x0000000000400000-0x00000000004C7000-memory.dmp

Filesize
796KB

Download
memory/804-76-0x00000000006BC000-0x00000000006D1000-memory.dmp

Filesize
84KB

Download
memory/1320-55-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/1320-56-0x0000000075D01000-0x0000000075D03000-memory.dmp

Filesize
8KB

Download
memory/1320-68-0x0000000000400000-0x00000000004C7000-memory.dmp

Filesize
796KB

Download
memory/1320-54-0x00000000005AC000-0x00000000005C1000-memory.dmp

Filesize
84KB

Download
memory/1320-60-0x0000000000400000-0x00000000004C7000-memory.dmp

Filesize
796KB

Download
memory/1320-66-0x00000000005AC000-0x00000000005C1000-memory.dmp

Filesize
84KB

Download
memory/1320-67-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/1364-63-0x0000000000000000-mapping.dmp

Download
memory/1720-61-0x0000000000000000-mapping.dmp

Download
memory/1896-65-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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