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
Creates new service(s) 1 TTPs
persistence

New Service
T1050
Executes dropped EXE 1 IoCs

Processes:

omtpoxvm.exe

pid process

4060 omtpoxvm.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

3812 netsh.exe

pid	process
4060	omtpoxvm.exe

pid	process
3812	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\hxnpmktx\ImagePath = "C:\\Windows\\SysWOW64\\hxnpmktx\\omtpoxvm.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:

5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2372564722-193526734-2636556182-1000\Control Panel\International\Geo\Nation	5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

omtpoxvm.exe

description pid process target process

PID 4060 set thread context of 4040 4060 omtpoxvm.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

3112 sc.exe
968 sc.exe
3224 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

description	pid	process	target process
PID 4060 set thread context of 4040	4060	omtpoxvm.exe	svchost.exe

pid	process
3112	sc.exe
968	sc.exe
3224	sc.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6.exeomtpoxvm.exe

description	pid	process	target process
PID 3872 wrote to memory of 3696	3872	5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6.exe	cmd.exe
PID 3872 wrote to memory of 3696	3872	5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6.exe	cmd.exe
PID 3872 wrote to memory of 3696	3872	5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6.exe	cmd.exe
PID 3872 wrote to memory of 2268	3872	5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6.exe	cmd.exe
PID 3872 wrote to memory of 2268	3872	5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6.exe	cmd.exe
PID 3872 wrote to memory of 2268	3872	5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6.exe	cmd.exe
PID 3872 wrote to memory of 3112	3872	5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6.exe	sc.exe
PID 3872 wrote to memory of 3112	3872	5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6.exe	sc.exe
PID 3872 wrote to memory of 3112	3872	5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6.exe	sc.exe
PID 3872 wrote to memory of 968	3872	5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6.exe	sc.exe
PID 3872 wrote to memory of 968	3872	5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6.exe	sc.exe
PID 3872 wrote to memory of 968	3872	5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6.exe	sc.exe
PID 3872 wrote to memory of 3224	3872	5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6.exe	sc.exe
PID 3872 wrote to memory of 3224	3872	5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6.exe	sc.exe
PID 3872 wrote to memory of 3224	3872	5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6.exe	sc.exe
PID 3872 wrote to memory of 3812	3872	5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6.exe	netsh.exe
PID 3872 wrote to memory of 3812	3872	5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6.exe	netsh.exe
PID 3872 wrote to memory of 3812	3872	5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6.exe	netsh.exe
PID 4060 wrote to memory of 4040	4060	omtpoxvm.exe	svchost.exe
PID 4060 wrote to memory of 4040	4060	omtpoxvm.exe	svchost.exe
PID 4060 wrote to memory of 4040	4060	omtpoxvm.exe	svchost.exe
PID 4060 wrote to memory of 4040	4060	omtpoxvm.exe	svchost.exe
PID 4060 wrote to memory of 4040	4060	omtpoxvm.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6.exe
"C:\Users\Admin\AppData\Local\Temp\5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3872

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\hxnpmktx\
2⤵
PID:3696

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\omtpoxvm.exe" C:\Windows\SysWOW64\hxnpmktx\
2⤵
PID:2268

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create hxnpmktx binPath= "C:\Windows\SysWOW64\hxnpmktx\omtpoxvm.exe /d\"C:\Users\Admin\AppData\Local\Temp\5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:3112

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description hxnpmktx "wifi internet conection"
2⤵
- Launches sc.exe
PID:968

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start hxnpmktx
2⤵
- Launches sc.exe
PID:3224

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:3812

C:\Windows\SysWOW64\hxnpmktx\omtpoxvm.exe
C:\Windows\SysWOW64\hxnpmktx\omtpoxvm.exe /d"C:\Users\Admin\AppData\Local\Temp\5b115ea109dbf8e544900233d6147a179b4909be5bcf1159abb594ad3e272ce6.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4060

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
PID:4040

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\omtpoxvm.exe
Filesize
13.1MB

MD5
5340029df50a99d2a801f381bef7765d

SHA1
a9c634a7dc324f54b49db303eefd52be121e3849

SHA256
e8c32634015b7f7fa83c7eee2cbc8a6ab7181415fb8f2dbe35cfeba38f28b5b0

SHA512
75a500a447a237053e82813b7e7f108bec6d0117fe0c955fb2ba1a5a08891f75d2259bfd93e13fa238db3f1e036add9f3cf8d9c72b51d019d2cd00f46b283c80

Download Submit
C:\Windows\SysWOW64\hxnpmktx\omtpoxvm.exe
Filesize
13.1MB

MD5
5340029df50a99d2a801f381bef7765d

SHA1
a9c634a7dc324f54b49db303eefd52be121e3849

SHA256
e8c32634015b7f7fa83c7eee2cbc8a6ab7181415fb8f2dbe35cfeba38f28b5b0

SHA512
75a500a447a237053e82813b7e7f108bec6d0117fe0c955fb2ba1a5a08891f75d2259bfd93e13fa238db3f1e036add9f3cf8d9c72b51d019d2cd00f46b283c80

Download Submit
memory/968-135-0x0000000000000000-mapping.dmp

Download
memory/2268-132-0x0000000000000000-mapping.dmp

Download
memory/3112-134-0x0000000000000000-mapping.dmp

Download
memory/3224-136-0x0000000000000000-mapping.dmp

Download
memory/3696-131-0x0000000000000000-mapping.dmp

Download
memory/3812-137-0x0000000000000000-mapping.dmp

Download
memory/3872-130-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4040-140-0x0000000000000000-mapping.dmp

Download
memory/4040-141-0x0000000000C10000-0x0000000000C25000-memory.dmp

Filesize
84KB

Download
memory/4040-144-0x0000000000C10000-0x0000000000C25000-memory.dmp

Filesize
84KB

Download
memory/4040-145-0x0000000000C10000-0x0000000000C25000-memory.dmp

Filesize
84KB

Download
memory/4060-139-0x0000000000400000-0x000000000041F000-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