tofsee | 61df65948553b5e1e385bcfa866cae9a30ace0e427ab57e455985988d30eee20

General

Target

519a4bd72f7bc8a67c137c34d411b5be.exe
Size

312KB
MD5

519a4bd72f7bc8a67c137c34d411b5be
SHA1

37ca60f3bf1a4d7068cd19b1e3e9cf69afa269dc
SHA256

61df65948553b5e1e385bcfa866cae9a30ace0e427ab57e455985988d30eee20
SHA512

7b66bb5843e7b7f2ca95429c0bfd3dd049dc95346507cd0acb23947473daaf6e6b6cc45d59c7625f7e7e8c7a4ff6b00a3e8a7e25441865782f02b104b1db55e8
SSDEEP

3072:hpX6/jiqnsLTpqy0ZXRtmYoGLA5///Px8S5gJXga5MydPAv7wqqTM:T6/jXsLT4y0ZXRtmUA5HXx150wa87a

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\qqnpilai = "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

748 netsh.exe

pid	process
748	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\qqnpilai\ImagePath = "C:\\Windows\\SysWOW64\\qqnpilai\\ybyrikeu.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

1672 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

ybyrikeu.exe

pid process

1480 ybyrikeu.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

ybyrikeu.exe

description pid process target process

PID 1480 set thread context of 1672 1480 ybyrikeu.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

1760 sc.exe
1776 sc.exe
1788 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
1672	svchost.exe

pid	process
1480	ybyrikeu.exe

description	pid	process	target process
PID 1480 set thread context of 1672	1480	ybyrikeu.exe	svchost.exe

pid	process
1760	sc.exe
1776	sc.exe
1788	sc.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

519a4bd72f7bc8a67c137c34d411b5be.exeybyrikeu.exe

description	pid	process	target process
PID 824 wrote to memory of 1228	824	519a4bd72f7bc8a67c137c34d411b5be.exe	cmd.exe
PID 824 wrote to memory of 1228	824	519a4bd72f7bc8a67c137c34d411b5be.exe	cmd.exe
PID 824 wrote to memory of 1228	824	519a4bd72f7bc8a67c137c34d411b5be.exe	cmd.exe
PID 824 wrote to memory of 1228	824	519a4bd72f7bc8a67c137c34d411b5be.exe	cmd.exe
PID 824 wrote to memory of 328	824	519a4bd72f7bc8a67c137c34d411b5be.exe	cmd.exe
PID 824 wrote to memory of 328	824	519a4bd72f7bc8a67c137c34d411b5be.exe	cmd.exe
PID 824 wrote to memory of 328	824	519a4bd72f7bc8a67c137c34d411b5be.exe	cmd.exe
PID 824 wrote to memory of 328	824	519a4bd72f7bc8a67c137c34d411b5be.exe	cmd.exe
PID 824 wrote to memory of 1760	824	519a4bd72f7bc8a67c137c34d411b5be.exe	sc.exe
PID 824 wrote to memory of 1760	824	519a4bd72f7bc8a67c137c34d411b5be.exe	sc.exe
PID 824 wrote to memory of 1760	824	519a4bd72f7bc8a67c137c34d411b5be.exe	sc.exe
PID 824 wrote to memory of 1760	824	519a4bd72f7bc8a67c137c34d411b5be.exe	sc.exe
PID 824 wrote to memory of 1776	824	519a4bd72f7bc8a67c137c34d411b5be.exe	sc.exe
PID 824 wrote to memory of 1776	824	519a4bd72f7bc8a67c137c34d411b5be.exe	sc.exe
PID 824 wrote to memory of 1776	824	519a4bd72f7bc8a67c137c34d411b5be.exe	sc.exe
PID 824 wrote to memory of 1776	824	519a4bd72f7bc8a67c137c34d411b5be.exe	sc.exe
PID 824 wrote to memory of 1788	824	519a4bd72f7bc8a67c137c34d411b5be.exe	sc.exe
PID 824 wrote to memory of 1788	824	519a4bd72f7bc8a67c137c34d411b5be.exe	sc.exe
PID 824 wrote to memory of 1788	824	519a4bd72f7bc8a67c137c34d411b5be.exe	sc.exe
PID 824 wrote to memory of 1788	824	519a4bd72f7bc8a67c137c34d411b5be.exe	sc.exe
PID 824 wrote to memory of 748	824	519a4bd72f7bc8a67c137c34d411b5be.exe	netsh.exe
PID 824 wrote to memory of 748	824	519a4bd72f7bc8a67c137c34d411b5be.exe	netsh.exe
PID 824 wrote to memory of 748	824	519a4bd72f7bc8a67c137c34d411b5be.exe	netsh.exe
PID 824 wrote to memory of 748	824	519a4bd72f7bc8a67c137c34d411b5be.exe	netsh.exe
PID 1480 wrote to memory of 1672	1480	ybyrikeu.exe	svchost.exe
PID 1480 wrote to memory of 1672	1480	ybyrikeu.exe	svchost.exe
PID 1480 wrote to memory of 1672	1480	ybyrikeu.exe	svchost.exe
PID 1480 wrote to memory of 1672	1480	ybyrikeu.exe	svchost.exe
PID 1480 wrote to memory of 1672	1480	ybyrikeu.exe	svchost.exe
PID 1480 wrote to memory of 1672	1480	ybyrikeu.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\519a4bd72f7bc8a67c137c34d411b5be.exe
"C:\Users\Admin\AppData\Local\Temp\519a4bd72f7bc8a67c137c34d411b5be.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:824

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\qqnpilai\
2⤵
PID:1228

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ybyrikeu.exe" C:\Windows\SysWOW64\qqnpilai\
2⤵
PID:328

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create qqnpilai binPath= "C:\Windows\SysWOW64\qqnpilai\ybyrikeu.exe /d\"C:\Users\Admin\AppData\Local\Temp\519a4bd72f7bc8a67c137c34d411b5be.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:1760

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description qqnpilai "wifi internet conection"
2⤵
- Launches sc.exe
PID:1776

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start qqnpilai
2⤵
- Launches sc.exe
PID:1788

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:748

C:\Windows\SysWOW64\qqnpilai\ybyrikeu.exe
C:\Windows\SysWOW64\qqnpilai\ybyrikeu.exe /d"C:\Users\Admin\AppData\Local\Temp\519a4bd72f7bc8a67c137c34d411b5be.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1480

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Windows security bypass
- Sets service image path in registry
- Deletes itself
PID:1672

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\ybyrikeu.exe
Filesize
10.6MB

MD5
9c8e48479e87513b7ffc290c320d5d7a

SHA1
1b17ae319db5b26b69fdbeec13d2086d7d8e6ab6

SHA256
fd1119c4891a974a94cf519455c6d13cca917c8c686314cfc8cfec0b21628d47

SHA512
0c71433a50f6e7c91ab63203e6cd1a74f640828f4085176bcbedff8760cc57dad7800a7a6a1363fa289b2b42d0696c2eebe57c8d11d398ef91fcb9cfb3e40803

Download Submit
C:\Windows\SysWOW64\qqnpilai\ybyrikeu.exe
Filesize
10.6MB

MD5
9c8e48479e87513b7ffc290c320d5d7a

SHA1
1b17ae319db5b26b69fdbeec13d2086d7d8e6ab6

SHA256
fd1119c4891a974a94cf519455c6d13cca917c8c686314cfc8cfec0b21628d47

SHA512
0c71433a50f6e7c91ab63203e6cd1a74f640828f4085176bcbedff8760cc57dad7800a7a6a1363fa289b2b42d0696c2eebe57c8d11d398ef91fcb9cfb3e40803

Download Submit
memory/824-56-0x00000000001B0000-0x00000000001C3000-memory.dmp

Filesize
76KB

Download
memory/824-60-0x0000000000400000-0x00000000006E8000-memory.dmp

Filesize
2.9MB

Download
memory/1480-66-0x0000000000400000-0x00000000006E8000-memory.dmp

Filesize
2.9MB

Download
memory/1672-62-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1672-61-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1672-63-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1672-67-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1672-68-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1672-69-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1672-70-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads