tofsee | 4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0

General

Target

4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0.exe
Size

341KB
MD5

c8a7a319ce6c507a8fa2b90c201c728e
SHA1

d0683f663b502598c4f2c543cb1c2554eebd6e61
SHA256

4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0
SHA512

98c46849126cf94a3a9ac7c0c7e6525f44e2b46b77d6700e7c0adc61054b78f9cdc3d7bddecaf1ed4922d5f5af8c0426396ee26dcb31970225523118666864fc

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

43.231.4.7

lazystax.ru

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\gorrweyt = "0"	svchost.exe

Creates new service(s) 1 TTPs
persistence

New Service
T1050
Executes dropped EXE 1 IoCs

Processes:

ihtpueob.exe

pid process

900 ihtpueob.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

868 netsh.exe

pid	process
900	ihtpueob.exe

pid	process
868	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\gorrweyt\ImagePath = "C:\\Windows\\SysWOW64\\gorrweyt\\ihtpueob.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

876 svchost.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

ihtpueob.exe

description pid process target process

PID 900 set thread context of 876 900 ihtpueob.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

1672 sc.exe
584 sc.exe
948 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
876	svchost.exe

description	pid	process	target process
PID 900 set thread context of 876	900	ihtpueob.exe	svchost.exe

pid	process
1672	sc.exe
584	sc.exe
948	sc.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0.exeihtpueob.exe

description	pid	process	target process
PID 1644 wrote to memory of 628	1644	4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0.exe	cmd.exe
PID 1644 wrote to memory of 628	1644	4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0.exe	cmd.exe
PID 1644 wrote to memory of 628	1644	4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0.exe	cmd.exe
PID 1644 wrote to memory of 628	1644	4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0.exe	cmd.exe
PID 1644 wrote to memory of 1436	1644	4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0.exe	cmd.exe
PID 1644 wrote to memory of 1436	1644	4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0.exe	cmd.exe
PID 1644 wrote to memory of 1436	1644	4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0.exe	cmd.exe
PID 1644 wrote to memory of 1436	1644	4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0.exe	cmd.exe
PID 1644 wrote to memory of 948	1644	4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0.exe	sc.exe
PID 1644 wrote to memory of 948	1644	4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0.exe	sc.exe
PID 1644 wrote to memory of 948	1644	4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0.exe	sc.exe
PID 1644 wrote to memory of 948	1644	4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0.exe	sc.exe
PID 1644 wrote to memory of 1672	1644	4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0.exe	sc.exe
PID 1644 wrote to memory of 1672	1644	4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0.exe	sc.exe
PID 1644 wrote to memory of 1672	1644	4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0.exe	sc.exe
PID 1644 wrote to memory of 1672	1644	4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0.exe	sc.exe
PID 1644 wrote to memory of 584	1644	4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0.exe	sc.exe
PID 1644 wrote to memory of 584	1644	4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0.exe	sc.exe
PID 1644 wrote to memory of 584	1644	4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0.exe	sc.exe
PID 1644 wrote to memory of 584	1644	4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0.exe	sc.exe
PID 900 wrote to memory of 876	900	ihtpueob.exe	svchost.exe
PID 900 wrote to memory of 876	900	ihtpueob.exe	svchost.exe
PID 900 wrote to memory of 876	900	ihtpueob.exe	svchost.exe
PID 900 wrote to memory of 876	900	ihtpueob.exe	svchost.exe
PID 900 wrote to memory of 876	900	ihtpueob.exe	svchost.exe
PID 900 wrote to memory of 876	900	ihtpueob.exe	svchost.exe
PID 1644 wrote to memory of 868	1644	4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0.exe	netsh.exe
PID 1644 wrote to memory of 868	1644	4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0.exe	netsh.exe
PID 1644 wrote to memory of 868	1644	4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0.exe	netsh.exe
PID 1644 wrote to memory of 868	1644	4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0.exe
"C:\Users\Admin\AppData\Local\Temp\4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1644

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\gorrweyt\
2⤵
PID:628

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ihtpueob.exe" C:\Windows\SysWOW64\gorrweyt\
2⤵
PID:1436

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create gorrweyt binPath= "C:\Windows\SysWOW64\gorrweyt\ihtpueob.exe /d\"C:\Users\Admin\AppData\Local\Temp\4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:948

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description gorrweyt "wifi internet conection"
2⤵
- Launches sc.exe
PID:1672

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start gorrweyt
2⤵
- Launches sc.exe
PID:584

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:868

C:\Windows\SysWOW64\gorrweyt\ihtpueob.exe
C:\Windows\SysWOW64\gorrweyt\ihtpueob.exe /d"C:\Users\Admin\AppData\Local\Temp\4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:900

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Windows security bypass
- Sets service image path in registry
- Deletes itself
PID:876

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\ihtpueob.exe
Filesize
10.9MB

MD5
844c8640c830196b8d7c568a3cac7596

SHA1
1b8551552e3d92e82042fbee7317adcb07b4cc83

SHA256
4647b4bf686d484448d17ceaa079dea71809c67cf7f40322421e11cd6758bab7

SHA512
1e292a9dcb73ae1a71b988cd68b97f9932284b8bc4f0226db2dcad3b03979f078f9d600b084622688a1cec38ed5f0cce162bccf31a048f52f8a0faa60e9c4e17

Download Submit
C:\Windows\SysWOW64\gorrweyt\ihtpueob.exe
Filesize
10.9MB

MD5
844c8640c830196b8d7c568a3cac7596

SHA1
1b8551552e3d92e82042fbee7317adcb07b4cc83

SHA256
4647b4bf686d484448d17ceaa079dea71809c67cf7f40322421e11cd6758bab7

SHA512
1e292a9dcb73ae1a71b988cd68b97f9932284b8bc4f0226db2dcad3b03979f078f9d600b084622688a1cec38ed5f0cce162bccf31a048f52f8a0faa60e9c4e17

Download Submit
memory/584-64-0x0000000000000000-mapping.dmp

Download
memory/628-56-0x0000000000000000-mapping.dmp

Download
memory/868-78-0x0000000000000000-mapping.dmp

Download
memory/876-81-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/876-77-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/876-71-0x0000000000089A6B-mapping.dmp

Download
memory/876-68-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/876-70-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/900-73-0x0000000000B20000-0x0000000000B31000-memory.dmp

Filesize
68KB

Download
memory/900-66-0x0000000000B20000-0x0000000000B31000-memory.dmp

Filesize
68KB

Download
memory/900-76-0x0000000000400000-0x000000000094F000-memory.dmp

Filesize
5.3MB

Download
memory/948-62-0x0000000000000000-mapping.dmp

Download
memory/1436-60-0x0000000000000000-mapping.dmp

Download
memory/1644-59-0x0000000000400000-0x000000000094F000-memory.dmp

Filesize
5.3MB

Download
memory/1644-54-0x0000000000300000-0x0000000000311000-memory.dmp

Filesize
68KB

Download
memory/1644-57-0x0000000000300000-0x0000000000311000-memory.dmp

Filesize
68KB

Download
memory/1644-79-0x0000000000400000-0x000000000094F000-memory.dmp

Filesize
5.3MB

Download
memory/1644-58-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/1644-55-0x0000000075841000-0x0000000075843000-memory.dmp

Filesize
8KB

Download
memory/1672-63-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads