tofsee | 3d8efe324e234ca7b31ec46dae3e9fe5c98da16bfcf5cd0b43585ef2b00de606

General

Target

4ac2eac8e4dac3288be47509a33c4a67.exe
Size

10.4MB
MD5

4ac2eac8e4dac3288be47509a33c4a67
SHA1

b1fa98d1320a6c2d5ccc799dad147b4272f9825a
SHA256

3d8efe324e234ca7b31ec46dae3e9fe5c98da16bfcf5cd0b43585ef2b00de606
SHA512

5540a97eea6b3ea877623d1358761cd8b1a2467a9c559bd3aed4fd503db4281699acbd7e31c13da31c11ec48b335873513686b3bb41d38572218bc87a65c6790

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:

pkoqtcbn.exe

pid process

1576 pkoqtcbn.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

3904 svchost.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

pkoqtcbn.exe

description pid process target process

PID 1576 set thread context of 3904 1576 pkoqtcbn.exe svchost.exe
Launches sc.exe
Sc.exe is a Windows utlilty to control services on the system.

pid	process
1576	pkoqtcbn.exe

pid	process
3904	svchost.exe

description	pid	process	target process
PID 1576 set thread context of 3904	1576	pkoqtcbn.exe	svchost.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

4ac2eac8e4dac3288be47509a33c4a67.exepkoqtcbn.exe

description	pid	process	target process
PID 984 wrote to memory of 1864	984	4ac2eac8e4dac3288be47509a33c4a67.exe	cmd.exe
PID 984 wrote to memory of 1864	984	4ac2eac8e4dac3288be47509a33c4a67.exe	cmd.exe
PID 984 wrote to memory of 1864	984	4ac2eac8e4dac3288be47509a33c4a67.exe	cmd.exe
PID 984 wrote to memory of 2696	984	4ac2eac8e4dac3288be47509a33c4a67.exe	cmd.exe
PID 984 wrote to memory of 2696	984	4ac2eac8e4dac3288be47509a33c4a67.exe	cmd.exe
PID 984 wrote to memory of 2696	984	4ac2eac8e4dac3288be47509a33c4a67.exe	cmd.exe
PID 984 wrote to memory of 3976	984	4ac2eac8e4dac3288be47509a33c4a67.exe	sc.exe
PID 984 wrote to memory of 3976	984	4ac2eac8e4dac3288be47509a33c4a67.exe	sc.exe
PID 984 wrote to memory of 3976	984	4ac2eac8e4dac3288be47509a33c4a67.exe	sc.exe
PID 984 wrote to memory of 200	984	4ac2eac8e4dac3288be47509a33c4a67.exe	sc.exe
PID 984 wrote to memory of 200	984	4ac2eac8e4dac3288be47509a33c4a67.exe	sc.exe
PID 984 wrote to memory of 200	984	4ac2eac8e4dac3288be47509a33c4a67.exe	sc.exe
PID 984 wrote to memory of 3512	984	4ac2eac8e4dac3288be47509a33c4a67.exe	sc.exe
PID 984 wrote to memory of 3512	984	4ac2eac8e4dac3288be47509a33c4a67.exe	sc.exe
PID 984 wrote to memory of 3512	984	4ac2eac8e4dac3288be47509a33c4a67.exe	sc.exe
PID 1576 wrote to memory of 3904	1576	pkoqtcbn.exe	svchost.exe
PID 1576 wrote to memory of 3904	1576	pkoqtcbn.exe	svchost.exe
PID 1576 wrote to memory of 3904	1576	pkoqtcbn.exe	svchost.exe
PID 1576 wrote to memory of 3904	1576	pkoqtcbn.exe	svchost.exe
PID 1576 wrote to memory of 3904	1576	pkoqtcbn.exe	svchost.exe
PID 984 wrote to memory of 2056	984	4ac2eac8e4dac3288be47509a33c4a67.exe	netsh.exe
PID 984 wrote to memory of 2056	984	4ac2eac8e4dac3288be47509a33c4a67.exe	netsh.exe
PID 984 wrote to memory of 2056	984	4ac2eac8e4dac3288be47509a33c4a67.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\4ac2eac8e4dac3288be47509a33c4a67.exe
"C:\Users\Admin\AppData\Local\Temp\4ac2eac8e4dac3288be47509a33c4a67.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:984

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\wfmikvck\
2⤵
PID:1864

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\pkoqtcbn.exe" C:\Windows\SysWOW64\wfmikvck\
2⤵
PID:2696

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create wfmikvck binPath= "C:\Windows\SysWOW64\wfmikvck\pkoqtcbn.exe /d\"C:\Users\Admin\AppData\Local\Temp\4ac2eac8e4dac3288be47509a33c4a67.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
PID:3976

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description wfmikvck "wifi internet conection"
2⤵
PID:200

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start wfmikvck
2⤵
PID:3512

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:2056

C:\Windows\SysWOW64\wfmikvck\pkoqtcbn.exe
C:\Windows\SysWOW64\wfmikvck\pkoqtcbn.exe /d"C:\Users\Admin\AppData\Local\Temp\4ac2eac8e4dac3288be47509a33c4a67.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1576

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Deletes itself
PID:3904

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\pkoqtcbn.exe
MD5
13aa6e16118572c60f68260a358a8c56

SHA1
35d8d8df2da6124afdfe6539ce8c820777c6f57b

SHA256
991f3f45839ba20c9fdbfc0bbbe4405df794bd6c3ee43453875ccd3883fe2d71

SHA512
808a7a6b9fd4ce09d38bd5622e5c19c5824032a55a4e195ca870cb12d5bbe9338c289873fa69a87ffec7139b130481cea8c5544bed1c428c7c05814dba26530b

Download Submit
C:\Windows\SysWOW64\wfmikvck\pkoqtcbn.exe
MD5
13aa6e16118572c60f68260a358a8c56

SHA1
35d8d8df2da6124afdfe6539ce8c820777c6f57b

SHA256
991f3f45839ba20c9fdbfc0bbbe4405df794bd6c3ee43453875ccd3883fe2d71

SHA512
808a7a6b9fd4ce09d38bd5622e5c19c5824032a55a4e195ca870cb12d5bbe9338c289873fa69a87ffec7139b130481cea8c5544bed1c428c7c05814dba26530b

Download Submit
memory/200-6-0x0000000000000000-mapping.dmp

Download
memory/1864-2-0x0000000000000000-mapping.dmp

Download
memory/2056-12-0x0000000000000000-mapping.dmp

Download
memory/2696-3-0x0000000000000000-mapping.dmp

Download
memory/3512-7-0x0000000000000000-mapping.dmp

Download
memory/3904-10-0x0000000000559A6B-mapping.dmp

Download
memory/3904-9-0x0000000000550000-0x0000000000565000-memory.dmp

Filesize
84KB

Download
memory/3976-5-0x0000000000000000-mapping.dmp

Download

Analysis

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