tofsee | 5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6

General

Target

5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6.exe
Size

113KB
MD5

45b3273f12bc83726743d90f4d62e100
SHA1

85da9c8630b48fca68849323eb469857fb93829a
SHA256

5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6
SHA512

e19aca6b4095b18b8d734b8ee4ad39b6a574689d59726f63db28b20be52a2815091ef0b87c64fdaa37c14c0818e93ed5cfe0f333b646347e9eef1d72c768be4d

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\fmgcpvlc = "0"	svchost.exe

Creates new service(s) 1 TTPs
persistence

New Service
T1050
Executes dropped EXE 1 IoCs

Processes:

ecjfenlc.exe

pid process

1996 ecjfenlc.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

1724 netsh.exe

pid	process
1996	ecjfenlc.exe

pid	process
1724	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\fmgcpvlc\ImagePath = "C:\\Windows\\SysWOW64\\fmgcpvlc\\ecjfenlc.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

108 svchost.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

ecjfenlc.exe

description pid process target process

PID 1996 set thread context of 108 1996 ecjfenlc.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

1320 sc.exe
1920 sc.exe
332 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
108	svchost.exe

description	pid	process	target process
PID 1996 set thread context of 108	1996	ecjfenlc.exe	svchost.exe

pid	process
1320	sc.exe
1920	sc.exe
332	sc.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6.exeecjfenlc.exe

description	pid	process	target process
PID 1960 wrote to memory of 1204	1960	5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6.exe	cmd.exe
PID 1960 wrote to memory of 1204	1960	5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6.exe	cmd.exe
PID 1960 wrote to memory of 1204	1960	5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6.exe	cmd.exe
PID 1960 wrote to memory of 1204	1960	5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6.exe	cmd.exe
PID 1960 wrote to memory of 1244	1960	5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6.exe	cmd.exe
PID 1960 wrote to memory of 1244	1960	5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6.exe	cmd.exe
PID 1960 wrote to memory of 1244	1960	5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6.exe	cmd.exe
PID 1960 wrote to memory of 1244	1960	5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6.exe	cmd.exe
PID 1960 wrote to memory of 1320	1960	5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6.exe	sc.exe
PID 1960 wrote to memory of 1320	1960	5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6.exe	sc.exe
PID 1960 wrote to memory of 1320	1960	5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6.exe	sc.exe
PID 1960 wrote to memory of 1320	1960	5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6.exe	sc.exe
PID 1960 wrote to memory of 1920	1960	5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6.exe	sc.exe
PID 1960 wrote to memory of 1920	1960	5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6.exe	sc.exe
PID 1960 wrote to memory of 1920	1960	5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6.exe	sc.exe
PID 1960 wrote to memory of 1920	1960	5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6.exe	sc.exe
PID 1960 wrote to memory of 332	1960	5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6.exe	sc.exe
PID 1960 wrote to memory of 332	1960	5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6.exe	sc.exe
PID 1960 wrote to memory of 332	1960	5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6.exe	sc.exe
PID 1960 wrote to memory of 332	1960	5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6.exe	sc.exe
PID 1960 wrote to memory of 1724	1960	5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6.exe	netsh.exe
PID 1960 wrote to memory of 1724	1960	5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6.exe	netsh.exe
PID 1960 wrote to memory of 1724	1960	5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6.exe	netsh.exe
PID 1960 wrote to memory of 1724	1960	5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6.exe	netsh.exe
PID 1996 wrote to memory of 108	1996	ecjfenlc.exe	svchost.exe
PID 1996 wrote to memory of 108	1996	ecjfenlc.exe	svchost.exe
PID 1996 wrote to memory of 108	1996	ecjfenlc.exe	svchost.exe
PID 1996 wrote to memory of 108	1996	ecjfenlc.exe	svchost.exe
PID 1996 wrote to memory of 108	1996	ecjfenlc.exe	svchost.exe
PID 1996 wrote to memory of 108	1996	ecjfenlc.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6.exe
"C:\Users\Admin\AppData\Local\Temp\5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1960

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\fmgcpvlc\
2⤵
PID:1204

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ecjfenlc.exe" C:\Windows\SysWOW64\fmgcpvlc\
2⤵
PID:1244

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create fmgcpvlc binPath= "C:\Windows\SysWOW64\fmgcpvlc\ecjfenlc.exe /d\"C:\Users\Admin\AppData\Local\Temp\5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:1320

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description fmgcpvlc "wifi internet conection"
2⤵
- Launches sc.exe
PID:1920

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start fmgcpvlc
2⤵
- Launches sc.exe
PID:332

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:1724

C:\Windows\SysWOW64\fmgcpvlc\ecjfenlc.exe
C:\Windows\SysWOW64\fmgcpvlc\ecjfenlc.exe /d"C:\Users\Admin\AppData\Local\Temp\5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1996

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Windows security bypass
- Sets service image path in registry
- Deletes itself
PID:108

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\ecjfenlc.exe
Filesize
11.5MB

MD5
1cacfba3c4e00c7af0f644d064865c2e

SHA1
d398b762089c2693e2d645f3dfcbcc2a84a70b70

SHA256
7a8d5df23db15a63d1c61a85c39fab870855afb8271b986680c76e52f7b02dc1

SHA512
c0a21201fde1e947fc5704a3b853f263e0a96e18bedc85bbe5d79a93dd009009f2af1c4cf38b3e2cbd86ba6055c9309313ed00de258c3199e3224908ebcdf63a

Download Submit
C:\Windows\SysWOW64\fmgcpvlc\ecjfenlc.exe
Filesize
11.5MB

MD5
1cacfba3c4e00c7af0f644d064865c2e

SHA1
d398b762089c2693e2d645f3dfcbcc2a84a70b70

SHA256
7a8d5df23db15a63d1c61a85c39fab870855afb8271b986680c76e52f7b02dc1

SHA512
c0a21201fde1e947fc5704a3b853f263e0a96e18bedc85bbe5d79a93dd009009f2af1c4cf38b3e2cbd86ba6055c9309313ed00de258c3199e3224908ebcdf63a

Download Submit
memory/108-68-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/108-72-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/108-75-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/108-66-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/108-73-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/108-69-0x0000000000089A6B-mapping.dmp

Download
memory/332-61-0x0000000000000000-mapping.dmp

Download
memory/1204-56-0x0000000000000000-mapping.dmp

Download
memory/1244-57-0x0000000000000000-mapping.dmp

Download
memory/1320-59-0x0000000000000000-mapping.dmp

Download
memory/1724-62-0x0000000000000000-mapping.dmp

Download
memory/1920-60-0x0000000000000000-mapping.dmp

Download
memory/1960-55-0x00000000760F1000-0x00000000760F3000-memory.dmp

Filesize
8KB

Download
memory/1960-54-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1996-64-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads