tofsee | 6d1c55b32923f8a5c29fbfd3a1596bc9ef0a6f5376d8b923dcb334fc7ce97c07

General

Target

file.exe
Size

349KB
MD5

a1799db268c1e09addebda326640d27a
SHA1

2e7dd4871e0220a69c1913c974ddc5f43ee4fb25
SHA256

6d1c55b32923f8a5c29fbfd3a1596bc9ef0a6f5376d8b923dcb334fc7ce97c07
SHA512

6ead660126768007d2bb296656654867cd4a6642fccf9122415de573fc9a1644900c9b0b2342c6218ae24dae690e04868ab03ee197d5ba3aa18136eb0ae775f4
SSDEEP

3072:ix4P18aXVLB9+mTtq5qWGcjKQ10S+LwgME9WKFL6OhtWItQTIhIh3eGjMgG1ao5w:lOEVLr+mTnWr2W0S+zWY9uRjMgU

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
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

2036 netsh.exe

pid	process
2036	netsh.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

file.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Windows\CurrentVersion\Run\nruedzii = "\"C:\\Users\\Admin\\gsbpokty.exe\""	file.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

1320 sc.exe
1648 sc.exe
1976 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
1320	sc.exe
1648	sc.exe
1976	sc.exe

Suspicious use of WriteProcessMemory 24 IoCs

Processes:

file.exe

description	pid	process	target process
PID 1644 wrote to memory of 1884	1644	file.exe	cmd.exe
PID 1644 wrote to memory of 1884	1644	file.exe	cmd.exe
PID 1644 wrote to memory of 1884	1644	file.exe	cmd.exe
PID 1644 wrote to memory of 1884	1644	file.exe	cmd.exe
PID 1644 wrote to memory of 748	1644	file.exe	cmd.exe
PID 1644 wrote to memory of 748	1644	file.exe	cmd.exe
PID 1644 wrote to memory of 748	1644	file.exe	cmd.exe
PID 1644 wrote to memory of 748	1644	file.exe	cmd.exe
PID 1644 wrote to memory of 1320	1644	file.exe	sc.exe
PID 1644 wrote to memory of 1320	1644	file.exe	sc.exe
PID 1644 wrote to memory of 1320	1644	file.exe	sc.exe
PID 1644 wrote to memory of 1320	1644	file.exe	sc.exe
PID 1644 wrote to memory of 1648	1644	file.exe	sc.exe
PID 1644 wrote to memory of 1648	1644	file.exe	sc.exe
PID 1644 wrote to memory of 1648	1644	file.exe	sc.exe
PID 1644 wrote to memory of 1648	1644	file.exe	sc.exe
PID 1644 wrote to memory of 1976	1644	file.exe	sc.exe
PID 1644 wrote to memory of 1976	1644	file.exe	sc.exe
PID 1644 wrote to memory of 1976	1644	file.exe	sc.exe
PID 1644 wrote to memory of 1976	1644	file.exe	sc.exe
PID 1644 wrote to memory of 2036	1644	file.exe	netsh.exe
PID 1644 wrote to memory of 2036	1644	file.exe	netsh.exe
PID 1644 wrote to memory of 2036	1644	file.exe	netsh.exe
PID 1644 wrote to memory of 2036	1644	file.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1644

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\mqtdcyhh\
2⤵
PID:1884

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\firccyyv.exe" C:\Windows\SysWOW64\mqtdcyhh\
2⤵
PID:748

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create mqtdcyhh binPath= "C:\Windows\SysWOW64\mqtdcyhh\firccyyv.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:1320

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description mqtdcyhh "wifi internet conection"
2⤵
- Launches sc.exe
PID:1648

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start mqtdcyhh
2⤵
- Launches sc.exe
PID:1976

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:2036

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

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/748-58-0x0000000000000000-mapping.dmp

Download
memory/1320-61-0x0000000000000000-mapping.dmp

Download
memory/1644-54-0x000000000057A000-0x000000000058F000-memory.dmp

Filesize
84KB

Download
memory/1644-55-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/1644-56-0x00000000763D1000-0x00000000763D3000-memory.dmp

Filesize
8KB

Download
memory/1644-59-0x000000000057A000-0x000000000058F000-memory.dmp

Filesize
84KB

Download
memory/1644-60-0x0000000000400000-0x000000000045C000-memory.dmp

Filesize
368KB

Download
memory/1648-62-0x0000000000000000-mapping.dmp

Download
memory/1884-57-0x0000000000000000-mapping.dmp

Download
memory/1976-63-0x0000000000000000-mapping.dmp

Download
memory/2036-64-0x0000000000000000-mapping.dmp

Download

Analysis

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