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
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

1840 netsh.exe

pid	process
1840	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\pgbelghm\ImagePath = "C:\\Windows\\SysWOW64\\pgbelghm\\ipsnmgga.exe"	svchost.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

0a0dd74c400e848fcf84d1217695746f.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1675742406-747946869-1029867430-1000\Control Panel\International\Geo\Nation	0a0dd74c400e848fcf84d1217695746f.exe

Executes dropped EXE 1 IoCs

Processes:

ipsnmgga.exe

pid process

1548 ipsnmgga.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

ipsnmgga.exe

description pid process target process

PID 1548 set thread context of 4148 1548 ipsnmgga.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

4768 sc.exe
4180 sc.exe
4968 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Program crash 2 IoCs

Processes:

WerFault.exeWerFault.exe

pid pid_target process target process

2076 1656 WerFault.exe 0a0dd74c400e848fcf84d1217695746f.exe
4688 1548 WerFault.exe ipsnmgga.exe

pid	process
1548	ipsnmgga.exe

description	pid	process	target process
PID 1548 set thread context of 4148	1548	ipsnmgga.exe	svchost.exe

pid	process
4768	sc.exe
4180	sc.exe
4968	sc.exe

pid	pid_target	process	target process
2076	1656	WerFault.exe	0a0dd74c400e848fcf84d1217695746f.exe
4688	1548	WerFault.exe	ipsnmgga.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

0a0dd74c400e848fcf84d1217695746f.exeipsnmgga.exe

description	pid	process	target process
PID 1656 wrote to memory of 2288	1656	0a0dd74c400e848fcf84d1217695746f.exe	cmd.exe
PID 1656 wrote to memory of 2288	1656	0a0dd74c400e848fcf84d1217695746f.exe	cmd.exe
PID 1656 wrote to memory of 2288	1656	0a0dd74c400e848fcf84d1217695746f.exe	cmd.exe
PID 1656 wrote to memory of 800	1656	0a0dd74c400e848fcf84d1217695746f.exe	cmd.exe
PID 1656 wrote to memory of 800	1656	0a0dd74c400e848fcf84d1217695746f.exe	cmd.exe
PID 1656 wrote to memory of 800	1656	0a0dd74c400e848fcf84d1217695746f.exe	cmd.exe
PID 1656 wrote to memory of 4768	1656	0a0dd74c400e848fcf84d1217695746f.exe	sc.exe
PID 1656 wrote to memory of 4768	1656	0a0dd74c400e848fcf84d1217695746f.exe	sc.exe
PID 1656 wrote to memory of 4768	1656	0a0dd74c400e848fcf84d1217695746f.exe	sc.exe
PID 1656 wrote to memory of 4180	1656	0a0dd74c400e848fcf84d1217695746f.exe	sc.exe
PID 1656 wrote to memory of 4180	1656	0a0dd74c400e848fcf84d1217695746f.exe	sc.exe
PID 1656 wrote to memory of 4180	1656	0a0dd74c400e848fcf84d1217695746f.exe	sc.exe
PID 1656 wrote to memory of 4968	1656	0a0dd74c400e848fcf84d1217695746f.exe	sc.exe
PID 1656 wrote to memory of 4968	1656	0a0dd74c400e848fcf84d1217695746f.exe	sc.exe
PID 1656 wrote to memory of 4968	1656	0a0dd74c400e848fcf84d1217695746f.exe	sc.exe
PID 1656 wrote to memory of 1840	1656	0a0dd74c400e848fcf84d1217695746f.exe	netsh.exe
PID 1656 wrote to memory of 1840	1656	0a0dd74c400e848fcf84d1217695746f.exe	netsh.exe
PID 1656 wrote to memory of 1840	1656	0a0dd74c400e848fcf84d1217695746f.exe	netsh.exe
PID 1548 wrote to memory of 4148	1548	ipsnmgga.exe	svchost.exe
PID 1548 wrote to memory of 4148	1548	ipsnmgga.exe	svchost.exe
PID 1548 wrote to memory of 4148	1548	ipsnmgga.exe	svchost.exe
PID 1548 wrote to memory of 4148	1548	ipsnmgga.exe	svchost.exe
PID 1548 wrote to memory of 4148	1548	ipsnmgga.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\0a0dd74c400e848fcf84d1217695746f.exe
"C:\Users\Admin\AppData\Local\Temp\0a0dd74c400e848fcf84d1217695746f.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1656

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\pgbelghm\
2⤵
PID:2288

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ipsnmgga.exe" C:\Windows\SysWOW64\pgbelghm\
2⤵
PID:800

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create pgbelghm binPath= "C:\Windows\SysWOW64\pgbelghm\ipsnmgga.exe /d\"C:\Users\Admin\AppData\Local\Temp\0a0dd74c400e848fcf84d1217695746f.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:4768

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description pgbelghm "wifi internet conection"
2⤵
- Launches sc.exe
PID:4180

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start pgbelghm
2⤵
- Launches sc.exe
PID:4968

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:1840

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1656 -s 1196
2⤵
- Program crash
PID:2076

C:\Windows\SysWOW64\pgbelghm\ipsnmgga.exe
C:\Windows\SysWOW64\pgbelghm\ipsnmgga.exe /d"C:\Users\Admin\AppData\Local\Temp\0a0dd74c400e848fcf84d1217695746f.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1548

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
PID:4148

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1548 -s 516
2⤵
- Program crash
PID:4688

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 1656 -ip 1656
1⤵
PID:4108

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 1548 -ip 1548
1⤵
PID:1652

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

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\ipsnmgga.exe
Filesize
12.6MB

MD5
c0f02a9890dc0df05ccc8541425c9540

SHA1
7e11a6fd774dcdcd79e05de96916e8e5dd8f81d8

SHA256
2053d7e8aadbbc49049e360df5abdd48af4bd53d801594cbbe146d56a9e97c9b

SHA512
e4a8aa0cec183914dc2dff2d86bd710eb5648b629a6206b046070c89e849ce628995873391a428fd418b52774676a980db5cd96c172099ba2c1ea65a6ed69269

Download Submit
C:\Windows\SysWOW64\pgbelghm\ipsnmgga.exe
Filesize
12.6MB

MD5
c0f02a9890dc0df05ccc8541425c9540

SHA1
7e11a6fd774dcdcd79e05de96916e8e5dd8f81d8

SHA256
2053d7e8aadbbc49049e360df5abdd48af4bd53d801594cbbe146d56a9e97c9b

SHA512
e4a8aa0cec183914dc2dff2d86bd710eb5648b629a6206b046070c89e849ce628995873391a428fd418b52774676a980db5cd96c172099ba2c1ea65a6ed69269

Download Submit
memory/1548-145-0x0000000000400000-0x00000000006E9000-memory.dmp

Filesize
2.9MB

Download
memory/1656-135-0x0000000000880000-0x0000000000893000-memory.dmp

Filesize
76KB

Download
memory/1656-139-0x0000000000400000-0x00000000006E9000-memory.dmp

Filesize
2.9MB

Download
memory/4148-140-0x00000000005C0000-0x00000000005D5000-memory.dmp

Filesize
84KB

Download
memory/4148-143-0x00000000005C0000-0x00000000005D5000-memory.dmp

Filesize
84KB

Download
memory/4148-144-0x00000000005C0000-0x00000000005D5000-memory.dmp

Filesize
84KB

Download
memory/4148-146-0x00000000005C0000-0x00000000005D5000-memory.dmp

Filesize
84KB

Download
memory/4148-147-0x00000000005C0000-0x00000000005D5000-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