tofsee | 87dc31de037643474b884632f70af235d33d4f74130ab52e9e5f0ee90a14f6c7

General

Target

a58c26dd8d015d4e3b081b09c3b21f1cff71e42abe545d90872c2eef003d51c9.exe
Size

310KB
MD5

b2de784471ee083a4a7e2d6f3057e00c
SHA1

03e5e0fd35a1eba05ddb6d0c4f4a9d8c8d4c67a3
SHA256

a58c26dd8d015d4e3b081b09c3b21f1cff71e42abe545d90872c2eef003d51c9
SHA512

5aa37e1305403375b475df3abb5cb60aa6ae4e2f5f07b4d45828c67ef7591e931b7155e135d4898dc982404042dfaa7adb02f9fd12a8336b9cd30955f08125fb
SSDEEP

3072:iPlmU+ROj7FN7oY9hjFJBqqKjOyTpZHNBmN+tTJfNr+1QbSoymwTTuB:iPX+RAxoYzMF5TpZtBmwG0SdTy

Score

10^/10

tofsee evasion execution 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
Creates new service(s) 2 TTPs
persistence execution

Windows Service
T1543.003

Service Execution
T1569.002
Modifies Windows Firewall 2 TTPs 1 IoCs
evasion

Windows Service
T1543.003

Disable or Modify System Firewall
T1562.004

Processes:

netsh.exe

pid process

2700 netsh.exe

pid	process
2700	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

svchost.exe

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

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

2644 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

ubanvvdh.exe

pid process

2788 ubanvvdh.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

ubanvvdh.exe

description pid process target process

PID 2788 set thread context of 2644 2788 ubanvvdh.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

2744 sc.exe
2648 sc.exe
2684 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
2644	svchost.exe

pid	process
2788	ubanvvdh.exe

description	pid	process	target process
PID 2788 set thread context of 2644	2788	ubanvvdh.exe	svchost.exe

pid	process
2744	sc.exe
2648	sc.exe
2684	sc.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

a58c26dd8d015d4e3b081b09c3b21f1cff71e42abe545d90872c2eef003d51c9.exeubanvvdh.exe

description	pid	process	target process
PID 2988 wrote to memory of 2812	2988	a58c26dd8d015d4e3b081b09c3b21f1cff71e42abe545d90872c2eef003d51c9.exe	cmd.exe
PID 2988 wrote to memory of 2812	2988	a58c26dd8d015d4e3b081b09c3b21f1cff71e42abe545d90872c2eef003d51c9.exe	cmd.exe
PID 2988 wrote to memory of 2812	2988	a58c26dd8d015d4e3b081b09c3b21f1cff71e42abe545d90872c2eef003d51c9.exe	cmd.exe
PID 2988 wrote to memory of 2812	2988	a58c26dd8d015d4e3b081b09c3b21f1cff71e42abe545d90872c2eef003d51c9.exe	cmd.exe
PID 2988 wrote to memory of 2664	2988	a58c26dd8d015d4e3b081b09c3b21f1cff71e42abe545d90872c2eef003d51c9.exe	cmd.exe
PID 2988 wrote to memory of 2664	2988	a58c26dd8d015d4e3b081b09c3b21f1cff71e42abe545d90872c2eef003d51c9.exe	cmd.exe
PID 2988 wrote to memory of 2664	2988	a58c26dd8d015d4e3b081b09c3b21f1cff71e42abe545d90872c2eef003d51c9.exe	cmd.exe
PID 2988 wrote to memory of 2664	2988	a58c26dd8d015d4e3b081b09c3b21f1cff71e42abe545d90872c2eef003d51c9.exe	cmd.exe
PID 2988 wrote to memory of 2744	2988	a58c26dd8d015d4e3b081b09c3b21f1cff71e42abe545d90872c2eef003d51c9.exe	sc.exe
PID 2988 wrote to memory of 2744	2988	a58c26dd8d015d4e3b081b09c3b21f1cff71e42abe545d90872c2eef003d51c9.exe	sc.exe
PID 2988 wrote to memory of 2744	2988	a58c26dd8d015d4e3b081b09c3b21f1cff71e42abe545d90872c2eef003d51c9.exe	sc.exe
PID 2988 wrote to memory of 2744	2988	a58c26dd8d015d4e3b081b09c3b21f1cff71e42abe545d90872c2eef003d51c9.exe	sc.exe
PID 2988 wrote to memory of 2648	2988	a58c26dd8d015d4e3b081b09c3b21f1cff71e42abe545d90872c2eef003d51c9.exe	sc.exe
PID 2988 wrote to memory of 2648	2988	a58c26dd8d015d4e3b081b09c3b21f1cff71e42abe545d90872c2eef003d51c9.exe	sc.exe
PID 2988 wrote to memory of 2648	2988	a58c26dd8d015d4e3b081b09c3b21f1cff71e42abe545d90872c2eef003d51c9.exe	sc.exe
PID 2988 wrote to memory of 2648	2988	a58c26dd8d015d4e3b081b09c3b21f1cff71e42abe545d90872c2eef003d51c9.exe	sc.exe
PID 2988 wrote to memory of 2684	2988	a58c26dd8d015d4e3b081b09c3b21f1cff71e42abe545d90872c2eef003d51c9.exe	sc.exe
PID 2988 wrote to memory of 2684	2988	a58c26dd8d015d4e3b081b09c3b21f1cff71e42abe545d90872c2eef003d51c9.exe	sc.exe
PID 2988 wrote to memory of 2684	2988	a58c26dd8d015d4e3b081b09c3b21f1cff71e42abe545d90872c2eef003d51c9.exe	sc.exe
PID 2988 wrote to memory of 2684	2988	a58c26dd8d015d4e3b081b09c3b21f1cff71e42abe545d90872c2eef003d51c9.exe	sc.exe
PID 2988 wrote to memory of 2700	2988	a58c26dd8d015d4e3b081b09c3b21f1cff71e42abe545d90872c2eef003d51c9.exe	netsh.exe
PID 2988 wrote to memory of 2700	2988	a58c26dd8d015d4e3b081b09c3b21f1cff71e42abe545d90872c2eef003d51c9.exe	netsh.exe
PID 2988 wrote to memory of 2700	2988	a58c26dd8d015d4e3b081b09c3b21f1cff71e42abe545d90872c2eef003d51c9.exe	netsh.exe
PID 2988 wrote to memory of 2700	2988	a58c26dd8d015d4e3b081b09c3b21f1cff71e42abe545d90872c2eef003d51c9.exe	netsh.exe
PID 2788 wrote to memory of 2644	2788	ubanvvdh.exe	svchost.exe
PID 2788 wrote to memory of 2644	2788	ubanvvdh.exe	svchost.exe
PID 2788 wrote to memory of 2644	2788	ubanvvdh.exe	svchost.exe
PID 2788 wrote to memory of 2644	2788	ubanvvdh.exe	svchost.exe
PID 2788 wrote to memory of 2644	2788	ubanvvdh.exe	svchost.exe
PID 2788 wrote to memory of 2644	2788	ubanvvdh.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\a58c26dd8d015d4e3b081b09c3b21f1cff71e42abe545d90872c2eef003d51c9.exe
"C:\Users\Admin\AppData\Local\Temp\a58c26dd8d015d4e3b081b09c3b21f1cff71e42abe545d90872c2eef003d51c9.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2988

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ugxgnojk\
2⤵
PID:2812

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ubanvvdh.exe" C:\Windows\SysWOW64\ugxgnojk\
2⤵
PID:2664

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create ugxgnojk binPath= "C:\Windows\SysWOW64\ugxgnojk\ubanvvdh.exe /d\"C:\Users\Admin\AppData\Local\Temp\a58c26dd8d015d4e3b081b09c3b21f1cff71e42abe545d90872c2eef003d51c9.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:2744

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description ugxgnojk "wifi internet conection"
2⤵
- Launches sc.exe
PID:2648

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start ugxgnojk
2⤵
- Launches sc.exe
PID:2684

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:2700

C:\Windows\SysWOW64\ugxgnojk\ubanvvdh.exe
C:\Windows\SysWOW64\ugxgnojk\ubanvvdh.exe /d"C:\Users\Admin\AppData\Local\Temp\a58c26dd8d015d4e3b081b09c3b21f1cff71e42abe545d90872c2eef003d51c9.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2788

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
- Deletes itself
PID:2644

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

1

T1569

Service Execution

1

T1569.002

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Defense Evasion

Impair Defenses

1

T1562

Disable or Modify System Firewall

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\ubanvvdh.exe

Filesize
12.1MB

MD5
1469de52e8588072a0bc1a70124208b0

SHA1
05f5d4ea01870c04cc8a5b4d7efa7f057d2f450b

SHA256
c914435aa3cf47035edd8ed14f9a4680404b102ed786480ec147f146c30be66a

SHA512
63194a923520d4a94e241de21a87ac6c7457f8ab031eb2dc0ff99033c20f7186affe899f925eee6dc65c603b4198b4d4b02fa89c782577f5399f7281e5e6debd

Download Submit
memory/2644-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2644-11-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2644-14-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2644-17-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2644-18-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2788-15-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/2988-1-0x0000000000550000-0x0000000000650000-memory.dmp

Filesize
1024KB

Download
memory/2988-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2988-6-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/2988-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2988-8-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/2988-2-0x0000000000230000-0x0000000000243000-memory.dmp

Filesize
76KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads