tofsee | 5db2f772773cf804bafbf0801dc11a29093678fc9270cd1f350ab289557b91eb

General

Target

5db2f772773cf804bafbf0801dc11a29093678fc9270cd1f350ab289557b91eb.exe
Size

137KB
MD5

d9d34d8d20cf3b58ed3cca5d0c617dbd
SHA1

cd6e7f7b01361e49f986dd98475ad741fb436a53
SHA256

5db2f772773cf804bafbf0801dc11a29093678fc9270cd1f350ab289557b91eb
SHA512

042708d3ec9794b9045c4b96b5e5a59d9c6ad59e3c69e1eb1c31e47b720c23bca99bb4c837edfaf64f997a30ac0e54b617102cb72d00c7dcb671b88a82dc6004

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:

cxxeamcu.exe

pid process

1676 cxxeamcu.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

840 netsh.exe

pid	process
1676	cxxeamcu.exe

pid	process
840	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\sqplnhch\ImagePath = "C:\\Windows\\SysWOW64\\sqplnhch\\cxxeamcu.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

1688 svchost.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

cxxeamcu.exe

description pid process target process

PID 1676 set thread context of 1688 1676 cxxeamcu.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

1956 sc.exe
1740 sc.exe
1580 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
1688	svchost.exe

description	pid	process	target process
PID 1676 set thread context of 1688	1676	cxxeamcu.exe	svchost.exe

pid	process
1956	sc.exe
1740	sc.exe
1580	sc.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

5db2f772773cf804bafbf0801dc11a29093678fc9270cd1f350ab289557b91eb.execxxeamcu.exe

description	pid	process	target process
PID 1680 wrote to memory of 1152	1680	5db2f772773cf804bafbf0801dc11a29093678fc9270cd1f350ab289557b91eb.exe	cmd.exe
PID 1680 wrote to memory of 1152	1680	5db2f772773cf804bafbf0801dc11a29093678fc9270cd1f350ab289557b91eb.exe	cmd.exe
PID 1680 wrote to memory of 1152	1680	5db2f772773cf804bafbf0801dc11a29093678fc9270cd1f350ab289557b91eb.exe	cmd.exe
PID 1680 wrote to memory of 1152	1680	5db2f772773cf804bafbf0801dc11a29093678fc9270cd1f350ab289557b91eb.exe	cmd.exe
PID 1680 wrote to memory of 2008	1680	5db2f772773cf804bafbf0801dc11a29093678fc9270cd1f350ab289557b91eb.exe	cmd.exe
PID 1680 wrote to memory of 2008	1680	5db2f772773cf804bafbf0801dc11a29093678fc9270cd1f350ab289557b91eb.exe	cmd.exe
PID 1680 wrote to memory of 2008	1680	5db2f772773cf804bafbf0801dc11a29093678fc9270cd1f350ab289557b91eb.exe	cmd.exe
PID 1680 wrote to memory of 2008	1680	5db2f772773cf804bafbf0801dc11a29093678fc9270cd1f350ab289557b91eb.exe	cmd.exe
PID 1680 wrote to memory of 1956	1680	5db2f772773cf804bafbf0801dc11a29093678fc9270cd1f350ab289557b91eb.exe	sc.exe
PID 1680 wrote to memory of 1956	1680	5db2f772773cf804bafbf0801dc11a29093678fc9270cd1f350ab289557b91eb.exe	sc.exe
PID 1680 wrote to memory of 1956	1680	5db2f772773cf804bafbf0801dc11a29093678fc9270cd1f350ab289557b91eb.exe	sc.exe
PID 1680 wrote to memory of 1956	1680	5db2f772773cf804bafbf0801dc11a29093678fc9270cd1f350ab289557b91eb.exe	sc.exe
PID 1680 wrote to memory of 1740	1680	5db2f772773cf804bafbf0801dc11a29093678fc9270cd1f350ab289557b91eb.exe	sc.exe
PID 1680 wrote to memory of 1740	1680	5db2f772773cf804bafbf0801dc11a29093678fc9270cd1f350ab289557b91eb.exe	sc.exe
PID 1680 wrote to memory of 1740	1680	5db2f772773cf804bafbf0801dc11a29093678fc9270cd1f350ab289557b91eb.exe	sc.exe
PID 1680 wrote to memory of 1740	1680	5db2f772773cf804bafbf0801dc11a29093678fc9270cd1f350ab289557b91eb.exe	sc.exe
PID 1680 wrote to memory of 1580	1680	5db2f772773cf804bafbf0801dc11a29093678fc9270cd1f350ab289557b91eb.exe	sc.exe
PID 1680 wrote to memory of 1580	1680	5db2f772773cf804bafbf0801dc11a29093678fc9270cd1f350ab289557b91eb.exe	sc.exe
PID 1680 wrote to memory of 1580	1680	5db2f772773cf804bafbf0801dc11a29093678fc9270cd1f350ab289557b91eb.exe	sc.exe
PID 1680 wrote to memory of 1580	1680	5db2f772773cf804bafbf0801dc11a29093678fc9270cd1f350ab289557b91eb.exe	sc.exe
PID 1680 wrote to memory of 840	1680	5db2f772773cf804bafbf0801dc11a29093678fc9270cd1f350ab289557b91eb.exe	netsh.exe
PID 1680 wrote to memory of 840	1680	5db2f772773cf804bafbf0801dc11a29093678fc9270cd1f350ab289557b91eb.exe	netsh.exe
PID 1680 wrote to memory of 840	1680	5db2f772773cf804bafbf0801dc11a29093678fc9270cd1f350ab289557b91eb.exe	netsh.exe
PID 1680 wrote to memory of 840	1680	5db2f772773cf804bafbf0801dc11a29093678fc9270cd1f350ab289557b91eb.exe	netsh.exe
PID 1676 wrote to memory of 1688	1676	cxxeamcu.exe	svchost.exe
PID 1676 wrote to memory of 1688	1676	cxxeamcu.exe	svchost.exe
PID 1676 wrote to memory of 1688	1676	cxxeamcu.exe	svchost.exe
PID 1676 wrote to memory of 1688	1676	cxxeamcu.exe	svchost.exe
PID 1676 wrote to memory of 1688	1676	cxxeamcu.exe	svchost.exe
PID 1676 wrote to memory of 1688	1676	cxxeamcu.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\5db2f772773cf804bafbf0801dc11a29093678fc9270cd1f350ab289557b91eb.exe
"C:\Users\Admin\AppData\Local\Temp\5db2f772773cf804bafbf0801dc11a29093678fc9270cd1f350ab289557b91eb.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1680

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\sqplnhch\
2⤵
PID:1152

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\cxxeamcu.exe" C:\Windows\SysWOW64\sqplnhch\
2⤵
PID:2008

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create sqplnhch binPath= "C:\Windows\SysWOW64\sqplnhch\cxxeamcu.exe /d\"C:\Users\Admin\AppData\Local\Temp\5db2f772773cf804bafbf0801dc11a29093678fc9270cd1f350ab289557b91eb.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:1956

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description sqplnhch "wifi internet conection"
2⤵
- Launches sc.exe
PID:1740

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start sqplnhch
2⤵
- Launches sc.exe
PID:1580

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:840

C:\Windows\SysWOW64\sqplnhch\cxxeamcu.exe
C:\Windows\SysWOW64\sqplnhch\cxxeamcu.exe /d"C:\Users\Admin\AppData\Local\Temp\5db2f772773cf804bafbf0801dc11a29093678fc9270cd1f350ab289557b91eb.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1676

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
- Deletes itself
PID:1688

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

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\cxxeamcu.exe
Filesize
11.2MB

MD5
958f7718dad7ad69a4a5a6ec316603e0

SHA1
e70239a70eff1b7c0db1c2aacb2b67dadc924adf

SHA256
b2a1e05377d72d9977a9756caccddf49c851a68254601fd133fb06efa4a26b3e

SHA512
604dd169e7bc3bd6056e40012de59610e522b88323ff31a073b7235d8cec416daa9c89b90ffa7097c79191b728e8d095919295de41fc62ae8667187e7ae8b57b

Download Submit
C:\Windows\SysWOW64\sqplnhch\cxxeamcu.exe
Filesize
11.2MB

MD5
958f7718dad7ad69a4a5a6ec316603e0

SHA1
e70239a70eff1b7c0db1c2aacb2b67dadc924adf

SHA256
b2a1e05377d72d9977a9756caccddf49c851a68254601fd133fb06efa4a26b3e

SHA512
604dd169e7bc3bd6056e40012de59610e522b88323ff31a073b7235d8cec416daa9c89b90ffa7097c79191b728e8d095919295de41fc62ae8667187e7ae8b57b

Download Submit
memory/840-63-0x0000000000000000-mapping.dmp

Download
memory/1152-56-0x0000000000000000-mapping.dmp

Download
memory/1580-61-0x0000000000000000-mapping.dmp

Download
memory/1676-65-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/1680-54-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/1680-55-0x00000000756C1000-0x00000000756C3000-memory.dmp

Filesize
8KB

Download
memory/1688-67-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1688-69-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1688-70-0x0000000000089A6B-mapping.dmp

Download
memory/1688-74-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1688-75-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1740-60-0x0000000000000000-mapping.dmp

Download
memory/1956-59-0x0000000000000000-mapping.dmp

Download
memory/2008-57-0x0000000000000000-mapping.dmp

Download

Analysis

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