tofsee | 27e3ed0b63c7aaf1cdef8ff971fdf5c60fbf4507ef55343096f94ff6feb5f516

General

Target

0a0dd74c400e848fcf84d1217695746f.exe
Size

313KB
MD5

0a0dd74c400e848fcf84d1217695746f
SHA1

87a35d0bceabe086f8bfb0b286dd678a9c93d35a
SHA256

27e3ed0b63c7aaf1cdef8ff971fdf5c60fbf4507ef55343096f94ff6feb5f516
SHA512

4bb6df5908a505f5d2a1871f86db31ec7883bf4cecd25ad5fcf4c3f7410fbede7487b12dad1e8442b83953510aad074ba04a89f067620c07d0acc89f1973454b
SSDEEP

3072:8pXIEUbI/4pLTdJdBaLh6MbISGRiKT87mk/PGXZuZQ2y5gW5cF3PF1YWUqqT:MNU8ApLTd7BcpbIRR1sjFqpSdtS7

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\qyhnyahi = "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

1792 netsh.exe

pid	process
1792	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\qyhnyahi\ImagePath = "C:\\Windows\\SysWOW64\\qyhnyahi\\mbtafdia.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

832 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

mbtafdia.exe

pid process

1744 mbtafdia.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

mbtafdia.exe

description pid process target process

PID 1744 set thread context of 832 1744 mbtafdia.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

1916 sc.exe
1488 sc.exe
1824 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
832	svchost.exe

pid	process
1744	mbtafdia.exe

description	pid	process	target process
PID 1744 set thread context of 832	1744	mbtafdia.exe	svchost.exe

pid	process
1916	sc.exe
1488	sc.exe
1824	sc.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

0a0dd74c400e848fcf84d1217695746f.exembtafdia.exe

description	pid	process	target process
PID 920 wrote to memory of 1332	920	0a0dd74c400e848fcf84d1217695746f.exe	cmd.exe
PID 920 wrote to memory of 1332	920	0a0dd74c400e848fcf84d1217695746f.exe	cmd.exe
PID 920 wrote to memory of 1332	920	0a0dd74c400e848fcf84d1217695746f.exe	cmd.exe
PID 920 wrote to memory of 1332	920	0a0dd74c400e848fcf84d1217695746f.exe	cmd.exe
PID 920 wrote to memory of 480	920	0a0dd74c400e848fcf84d1217695746f.exe	cmd.exe
PID 920 wrote to memory of 480	920	0a0dd74c400e848fcf84d1217695746f.exe	cmd.exe
PID 920 wrote to memory of 480	920	0a0dd74c400e848fcf84d1217695746f.exe	cmd.exe
PID 920 wrote to memory of 480	920	0a0dd74c400e848fcf84d1217695746f.exe	cmd.exe
PID 920 wrote to memory of 1916	920	0a0dd74c400e848fcf84d1217695746f.exe	sc.exe
PID 920 wrote to memory of 1916	920	0a0dd74c400e848fcf84d1217695746f.exe	sc.exe
PID 920 wrote to memory of 1916	920	0a0dd74c400e848fcf84d1217695746f.exe	sc.exe
PID 920 wrote to memory of 1916	920	0a0dd74c400e848fcf84d1217695746f.exe	sc.exe
PID 920 wrote to memory of 1488	920	0a0dd74c400e848fcf84d1217695746f.exe	sc.exe
PID 920 wrote to memory of 1488	920	0a0dd74c400e848fcf84d1217695746f.exe	sc.exe
PID 920 wrote to memory of 1488	920	0a0dd74c400e848fcf84d1217695746f.exe	sc.exe
PID 920 wrote to memory of 1488	920	0a0dd74c400e848fcf84d1217695746f.exe	sc.exe
PID 920 wrote to memory of 1824	920	0a0dd74c400e848fcf84d1217695746f.exe	sc.exe
PID 920 wrote to memory of 1824	920	0a0dd74c400e848fcf84d1217695746f.exe	sc.exe
PID 920 wrote to memory of 1824	920	0a0dd74c400e848fcf84d1217695746f.exe	sc.exe
PID 920 wrote to memory of 1824	920	0a0dd74c400e848fcf84d1217695746f.exe	sc.exe
PID 920 wrote to memory of 1792	920	0a0dd74c400e848fcf84d1217695746f.exe	netsh.exe
PID 920 wrote to memory of 1792	920	0a0dd74c400e848fcf84d1217695746f.exe	netsh.exe
PID 920 wrote to memory of 1792	920	0a0dd74c400e848fcf84d1217695746f.exe	netsh.exe
PID 920 wrote to memory of 1792	920	0a0dd74c400e848fcf84d1217695746f.exe	netsh.exe
PID 1744 wrote to memory of 832	1744	mbtafdia.exe	svchost.exe
PID 1744 wrote to memory of 832	1744	mbtafdia.exe	svchost.exe
PID 1744 wrote to memory of 832	1744	mbtafdia.exe	svchost.exe
PID 1744 wrote to memory of 832	1744	mbtafdia.exe	svchost.exe
PID 1744 wrote to memory of 832	1744	mbtafdia.exe	svchost.exe
PID 1744 wrote to memory of 832	1744	mbtafdia.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\0a0dd74c400e848fcf84d1217695746f.exe
"C:\Users\Admin\AppData\Local\Temp\0a0dd74c400e848fcf84d1217695746f.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:920

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\qyhnyahi\
2⤵
PID:1332

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\mbtafdia.exe" C:\Windows\SysWOW64\qyhnyahi\
2⤵
PID:480

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create qyhnyahi binPath= "C:\Windows\SysWOW64\qyhnyahi\mbtafdia.exe /d\"C:\Users\Admin\AppData\Local\Temp\0a0dd74c400e848fcf84d1217695746f.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:1916

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description qyhnyahi "wifi internet conection"
2⤵
- Launches sc.exe
PID:1488

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start qyhnyahi
2⤵
- Launches sc.exe
PID:1824

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:1792

C:\Windows\SysWOW64\qyhnyahi\mbtafdia.exe
C:\Windows\SysWOW64\qyhnyahi\mbtafdia.exe /d"C:\Users\Admin\AppData\Local\Temp\0a0dd74c400e848fcf84d1217695746f.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1744

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Windows security bypass
- Sets service image path in registry
- Deletes itself
PID:832

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\mbtafdia.exe
Filesize
12.6MB

MD5
fa5098162eea1f5f00720625c0161c65

SHA1
2a11a66f7562f53df25637164c9e54f775943a7a

SHA256
9bd92c779b1f25952f158089e8baf1956bf3fbd11642b3bddb7d60f7ddb014ea

SHA512
6a429befb2f30005d2dace6a0224f53a9895ce32643af9d3e4a8f99cab7f0d7ecdcbbeb4a9161c8356e153cf09b43820e60f0afbbf85905da852d3aba1bbe6b8

Download Submit
C:\Windows\SysWOW64\qyhnyahi\mbtafdia.exe
Filesize
12.6MB

MD5
fa5098162eea1f5f00720625c0161c65

SHA1
2a11a66f7562f53df25637164c9e54f775943a7a

SHA256
9bd92c779b1f25952f158089e8baf1956bf3fbd11642b3bddb7d60f7ddb014ea

SHA512
6a429befb2f30005d2dace6a0224f53a9895ce32643af9d3e4a8f99cab7f0d7ecdcbbeb4a9161c8356e153cf09b43820e60f0afbbf85905da852d3aba1bbe6b8

Download Submit
memory/832-62-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/832-61-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/832-63-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/832-67-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/832-68-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/832-69-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/832-70-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/920-56-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/920-60-0x0000000000400000-0x00000000006E9000-memory.dmp

Filesize
2.9MB

Download
memory/1744-64-0x0000000000400000-0x00000000006E9000-memory.dmp

Filesize
2.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads