tofsee | 388e770957cb4e6e396d8ef4a0cf158a69e3cdeb98157b013e79327013706afe

General

Target

b23ec80dcfd2ee8ad973ac39a4b6488b.exe
Size

13.5MB
MD5

b23ec80dcfd2ee8ad973ac39a4b6488b
SHA1

58a7c7a55442f3f22b61bb94eff369288f8b6392
SHA256

388e770957cb4e6e396d8ef4a0cf158a69e3cdeb98157b013e79327013706afe
SHA512

4f92d9235235702099771a60f5c8ea1fe83dd8dc2dbd05649d353f43de4c54a89249fb513659aad3022688e98cc8dbbe5a3ba144e12eedc3c2c000ca5d8e355d

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:

ojnfvgig.exe

pid process

4080 ojnfvgig.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

4444 svchost.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

ojnfvgig.exe

description pid process target process

PID 4080 set thread context of 4444 4080 ojnfvgig.exe svchost.exe
Launches sc.exe
Sc.exe is a Windows utlilty to control services on the system.

pid	process
4080	ojnfvgig.exe

pid	process
4444	svchost.exe

description	pid	process	target process
PID 4080 set thread context of 4444	4080	ojnfvgig.exe	svchost.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

b23ec80dcfd2ee8ad973ac39a4b6488b.exeojnfvgig.exe

description	pid	process	target process
PID 4680 wrote to memory of 3664	4680	b23ec80dcfd2ee8ad973ac39a4b6488b.exe	cmd.exe
PID 4680 wrote to memory of 3664	4680	b23ec80dcfd2ee8ad973ac39a4b6488b.exe	cmd.exe
PID 4680 wrote to memory of 3664	4680	b23ec80dcfd2ee8ad973ac39a4b6488b.exe	cmd.exe
PID 4680 wrote to memory of 3124	4680	b23ec80dcfd2ee8ad973ac39a4b6488b.exe	cmd.exe
PID 4680 wrote to memory of 3124	4680	b23ec80dcfd2ee8ad973ac39a4b6488b.exe	cmd.exe
PID 4680 wrote to memory of 3124	4680	b23ec80dcfd2ee8ad973ac39a4b6488b.exe	cmd.exe
PID 4680 wrote to memory of 4184	4680	b23ec80dcfd2ee8ad973ac39a4b6488b.exe	sc.exe
PID 4680 wrote to memory of 4184	4680	b23ec80dcfd2ee8ad973ac39a4b6488b.exe	sc.exe
PID 4680 wrote to memory of 4184	4680	b23ec80dcfd2ee8ad973ac39a4b6488b.exe	sc.exe
PID 4680 wrote to memory of 3892	4680	b23ec80dcfd2ee8ad973ac39a4b6488b.exe	sc.exe
PID 4680 wrote to memory of 3892	4680	b23ec80dcfd2ee8ad973ac39a4b6488b.exe	sc.exe
PID 4680 wrote to memory of 3892	4680	b23ec80dcfd2ee8ad973ac39a4b6488b.exe	sc.exe
PID 4680 wrote to memory of 3384	4680	b23ec80dcfd2ee8ad973ac39a4b6488b.exe	sc.exe
PID 4680 wrote to memory of 3384	4680	b23ec80dcfd2ee8ad973ac39a4b6488b.exe	sc.exe
PID 4680 wrote to memory of 3384	4680	b23ec80dcfd2ee8ad973ac39a4b6488b.exe	sc.exe
PID 4680 wrote to memory of 2092	4680	b23ec80dcfd2ee8ad973ac39a4b6488b.exe	netsh.exe
PID 4680 wrote to memory of 2092	4680	b23ec80dcfd2ee8ad973ac39a4b6488b.exe	netsh.exe
PID 4680 wrote to memory of 2092	4680	b23ec80dcfd2ee8ad973ac39a4b6488b.exe	netsh.exe
PID 4080 wrote to memory of 4444	4080	ojnfvgig.exe	svchost.exe
PID 4080 wrote to memory of 4444	4080	ojnfvgig.exe	svchost.exe
PID 4080 wrote to memory of 4444	4080	ojnfvgig.exe	svchost.exe
PID 4080 wrote to memory of 4444	4080	ojnfvgig.exe	svchost.exe
PID 4080 wrote to memory of 4444	4080	ojnfvgig.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\b23ec80dcfd2ee8ad973ac39a4b6488b.exe
"C:\Users\Admin\AppData\Local\Temp\b23ec80dcfd2ee8ad973ac39a4b6488b.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4680

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\xgdkrdln\
2⤵
PID:3664

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ojnfvgig.exe" C:\Windows\SysWOW64\xgdkrdln\
2⤵
PID:3124

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create xgdkrdln binPath= "C:\Windows\SysWOW64\xgdkrdln\ojnfvgig.exe /d\"C:\Users\Admin\AppData\Local\Temp\b23ec80dcfd2ee8ad973ac39a4b6488b.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
PID:4184

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description xgdkrdln "wifi internet conection"
2⤵
PID:3892

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start xgdkrdln
2⤵
PID:3384

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:2092

C:\Windows\SysWOW64\xgdkrdln\ojnfvgig.exe
C:\Windows\SysWOW64\xgdkrdln\ojnfvgig.exe /d"C:\Users\Admin\AppData\Local\Temp\b23ec80dcfd2ee8ad973ac39a4b6488b.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4080

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Deletes itself
PID:4444

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\ojnfvgig.exe
MD5
17c32908fefb8e3c52be09f803ef2902

SHA1
979ae470d0a732b1d3ec085be3818b1e9c5f1101

SHA256
ec985587b5d6566b53bff623243997bef69dff6ccb6313f51c1cf1fe88501894

SHA512
1f9e52d4728c0705e870b48f596c0afa0898265377c91c34a8f1c7bf548abef86df290869116cf2702315d6f7fd3e10cbf33fc88ef2530ab5a20f538339c641b

Download Submit
C:\Windows\SysWOW64\xgdkrdln\ojnfvgig.exe
MD5
17c32908fefb8e3c52be09f803ef2902

SHA1
979ae470d0a732b1d3ec085be3818b1e9c5f1101

SHA256
ec985587b5d6566b53bff623243997bef69dff6ccb6313f51c1cf1fe88501894

SHA512
1f9e52d4728c0705e870b48f596c0afa0898265377c91c34a8f1c7bf548abef86df290869116cf2702315d6f7fd3e10cbf33fc88ef2530ab5a20f538339c641b

Download Submit
memory/2092-11-0x0000000000000000-mapping.dmp

Download
memory/3124-5-0x0000000000000000-mapping.dmp

Download
memory/3384-9-0x0000000000000000-mapping.dmp

Download
memory/3664-4-0x0000000000000000-mapping.dmp

Download
memory/3892-8-0x0000000000000000-mapping.dmp

Download
memory/4080-12-0x0000000004252000-0x0000000004253000-memory.dmp

Filesize
4KB

Download
memory/4080-13-0x00000000049F0000-0x00000000049F1000-memory.dmp

Filesize
4KB

Download
memory/4184-7-0x0000000000000000-mapping.dmp

Download
memory/4444-15-0x0000000000C30000-0x0000000000C45000-memory.dmp

Filesize
84KB

Download
memory/4444-16-0x0000000000C39A6B-mapping.dmp

Download
memory/4680-2-0x0000000004486000-0x0000000004487000-memory.dmp

Filesize
4KB

Download
memory/4680-3-0x0000000005F40000-0x0000000005F41000-memory.dmp

Filesize
4KB

Download

Analysis

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