tofsee | 289638ff4cfd284afe4780faa40c63f0c484de2eaabe35f006cbfa7f538fe891

General

Target

433b76b50aff2852f8e7a5071594df71.exe
Size

14.7MB
MD5

433b76b50aff2852f8e7a5071594df71
SHA1

d721a6ffb0c601d9b7209ce0cf0334d9a70b4810
SHA256

289638ff4cfd284afe4780faa40c63f0c484de2eaabe35f006cbfa7f538fe891
SHA512

4b99fa41f4e937f109e9b3564146c12ed63bda8e354c2078a0c5d56af9afb611673a586995fb942efe3514c9c278c972c3610488e12410816e894127fcf08f7a

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee
Windows security bypass 2 TTPs
evasion trojan

Disabling Security Tools
T1089

Modify Registry
T1112
Creates new service(s) 1 TTPs
persistence

New Service
T1050
Executes dropped EXE 1 IoCs

Processes:

clfkcbws.exe

pid process

1680 clfkcbws.exe
Modifies Windows Firewall 1 TTPs
evasion

Modify Existing Service
T1031
Sets service image path in registry 2 TTPs
persistence

Registry Run Keys / Startup Folder
T1060

Modify Registry
T1112
Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

964 svchost.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

clfkcbws.exe

description pid process target process

PID 1680 set thread context of 964 1680 clfkcbws.exe svchost.exe
Launches sc.exe
Sc.exe is a Windows utlilty to control services on the system.

pid	process
1680	clfkcbws.exe

pid	process
964	svchost.exe

description	pid	process	target process
PID 1680 set thread context of 964	1680	clfkcbws.exe	svchost.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

433b76b50aff2852f8e7a5071594df71.execlfkcbws.exe

description	pid	process	target process
PID 1696 wrote to memory of 1708	1696	433b76b50aff2852f8e7a5071594df71.exe	cmd.exe
PID 1696 wrote to memory of 1708	1696	433b76b50aff2852f8e7a5071594df71.exe	cmd.exe
PID 1696 wrote to memory of 1708	1696	433b76b50aff2852f8e7a5071594df71.exe	cmd.exe
PID 1696 wrote to memory of 1708	1696	433b76b50aff2852f8e7a5071594df71.exe	cmd.exe
PID 1696 wrote to memory of 1108	1696	433b76b50aff2852f8e7a5071594df71.exe	cmd.exe
PID 1696 wrote to memory of 1108	1696	433b76b50aff2852f8e7a5071594df71.exe	cmd.exe
PID 1696 wrote to memory of 1108	1696	433b76b50aff2852f8e7a5071594df71.exe	cmd.exe
PID 1696 wrote to memory of 1108	1696	433b76b50aff2852f8e7a5071594df71.exe	cmd.exe
PID 1696 wrote to memory of 1356	1696	433b76b50aff2852f8e7a5071594df71.exe	sc.exe
PID 1696 wrote to memory of 1356	1696	433b76b50aff2852f8e7a5071594df71.exe	sc.exe
PID 1696 wrote to memory of 1356	1696	433b76b50aff2852f8e7a5071594df71.exe	sc.exe
PID 1696 wrote to memory of 1356	1696	433b76b50aff2852f8e7a5071594df71.exe	sc.exe
PID 1696 wrote to memory of 1296	1696	433b76b50aff2852f8e7a5071594df71.exe	sc.exe
PID 1696 wrote to memory of 1296	1696	433b76b50aff2852f8e7a5071594df71.exe	sc.exe
PID 1696 wrote to memory of 1296	1696	433b76b50aff2852f8e7a5071594df71.exe	sc.exe
PID 1696 wrote to memory of 1296	1696	433b76b50aff2852f8e7a5071594df71.exe	sc.exe
PID 1696 wrote to memory of 268	1696	433b76b50aff2852f8e7a5071594df71.exe	sc.exe
PID 1696 wrote to memory of 268	1696	433b76b50aff2852f8e7a5071594df71.exe	sc.exe
PID 1696 wrote to memory of 268	1696	433b76b50aff2852f8e7a5071594df71.exe	sc.exe
PID 1696 wrote to memory of 268	1696	433b76b50aff2852f8e7a5071594df71.exe	sc.exe
PID 1696 wrote to memory of 1016	1696	433b76b50aff2852f8e7a5071594df71.exe	netsh.exe
PID 1696 wrote to memory of 1016	1696	433b76b50aff2852f8e7a5071594df71.exe	netsh.exe
PID 1696 wrote to memory of 1016	1696	433b76b50aff2852f8e7a5071594df71.exe	netsh.exe
PID 1696 wrote to memory of 1016	1696	433b76b50aff2852f8e7a5071594df71.exe	netsh.exe
PID 1680 wrote to memory of 964	1680	clfkcbws.exe	svchost.exe
PID 1680 wrote to memory of 964	1680	clfkcbws.exe	svchost.exe
PID 1680 wrote to memory of 964	1680	clfkcbws.exe	svchost.exe
PID 1680 wrote to memory of 964	1680	clfkcbws.exe	svchost.exe
PID 1680 wrote to memory of 964	1680	clfkcbws.exe	svchost.exe
PID 1680 wrote to memory of 964	1680	clfkcbws.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\433b76b50aff2852f8e7a5071594df71.exe
"C:\Users\Admin\AppData\Local\Temp\433b76b50aff2852f8e7a5071594df71.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1696

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\rfbgoqrm\
2⤵
PID:1708

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\clfkcbws.exe" C:\Windows\SysWOW64\rfbgoqrm\
2⤵
PID:1108

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create rfbgoqrm binPath= "C:\Windows\SysWOW64\rfbgoqrm\clfkcbws.exe /d\"C:\Users\Admin\AppData\Local\Temp\433b76b50aff2852f8e7a5071594df71.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
PID:1356

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description rfbgoqrm "wifi internet conection"
2⤵
PID:1296

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start rfbgoqrm
2⤵
PID:268

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⤵
PID:1016

C:\Windows\SysWOW64\rfbgoqrm\clfkcbws.exe
C:\Windows\SysWOW64\rfbgoqrm\clfkcbws.exe /d"C:\Users\Admin\AppData\Local\Temp\433b76b50aff2852f8e7a5071594df71.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1680

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Deletes itself
PID:964

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

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\clfkcbws.exe
MD5
1ee4bd25aa7ded44aa9ca57bc69d0c50

SHA1
ce93ea9461fecf270448ca8ed09b16dbd8cd4842

SHA256
8ceaabcc4c809286e3a4ec8d1832ec8876764f31a9362c943548a750e225dacd

SHA512
9c152f916585730fea89d3c529ad8910a99cf6c4d22b0db1b4de11d75482cf2cd18f1334c1337bd901bb786a4cc7f9e0c9565c67d2cc257d27045699e22bad15

Download Submit
C:\Windows\SysWOW64\rfbgoqrm\clfkcbws.exe
MD5
1ee4bd25aa7ded44aa9ca57bc69d0c50

SHA1
ce93ea9461fecf270448ca8ed09b16dbd8cd4842

SHA256
8ceaabcc4c809286e3a4ec8d1832ec8876764f31a9362c943548a750e225dacd

SHA512
9c152f916585730fea89d3c529ad8910a99cf6c4d22b0db1b4de11d75482cf2cd18f1334c1337bd901bb786a4cc7f9e0c9565c67d2cc257d27045699e22bad15

Download Submit
memory/268-9-0x0000000000000000-mapping.dmp

Download
memory/964-16-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/964-14-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/964-15-0x00000000000C9A6B-mapping.dmp

Download
memory/1016-11-0x0000000000000000-mapping.dmp

Download
memory/1108-5-0x0000000000000000-mapping.dmp

Download
memory/1296-8-0x0000000000000000-mapping.dmp

Download
memory/1356-7-0x0000000000000000-mapping.dmp

Download
memory/1680-12-0x0000000000E19000-0x0000000000E1A000-memory.dmp

Filesize
4KB

Download
memory/1680-13-0x0000000001170000-0x0000000001181000-memory.dmp

Filesize
68KB

Download
memory/1696-2-0x00000000002D7000-0x00000000002D8000-memory.dmp

Filesize
4KB

Download
memory/1696-3-0x00000000025A0000-0x00000000025B1000-memory.dmp

Filesize
68KB

Download
memory/1708-4-0x0000000000000000-mapping.dmp

Download

Analysis

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