tofsee | 92d58ed3de4b25d0508ca5b3afe6ef6c5e4e15eed2779986d6940126e7eecfda

General

Target

b66d115512ea956db9993f91a3349777.exe
Size

14.0MB
MD5

b66d115512ea956db9993f91a3349777
SHA1

113b9cffc62fdced336e71ce7dad47e4649acd01
SHA256

92d58ed3de4b25d0508ca5b3afe6ef6c5e4e15eed2779986d6940126e7eecfda
SHA512

24cd97820000849f3034f6524943e8a06c0b88b34a9ea6254d3b730044b92f66f738a72d02265d1be2019905a032528c4005765c611abc57cdaefae5d474e22b

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:

kxloqqob.exe

pid process

2240 kxloqqob.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

2192 svchost.exe
Drops file in System32 directory 1 IoCs

Processes:

svchost.exe

description ioc process

File created C:\Windows\SysWOW64\config\systemprofile:.repos svchost.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

kxloqqob.exe

description pid process target process

PID 2240 set thread context of 2192 2240 kxloqqob.exe svchost.exe
Launches sc.exe
Sc.exe is a Windows utlilty to control services on the system.

pid	process
2240	kxloqqob.exe

pid	process
2192	svchost.exe

description	ioc	process
File created	C:\Windows\SysWOW64\config\systemprofile:.repos	svchost.exe

description	pid	process	target process
PID 2240 set thread context of 2192	2240	kxloqqob.exe	svchost.exe

Modifies data under HKEY_USERS 2 IoCs

Processes:

svchost.exe

description	ioc	process
Set value (data)	\REGISTRY\USER\.DEFAULT\Control Panel\Buses\Config0 = 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	svchost.exe
Key created	\REGISTRY\USER\.DEFAULT\Control Panel\Buses	svchost.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

b66d115512ea956db9993f91a3349777.exekxloqqob.exe

description	pid	process	target process
PID 648 wrote to memory of 3972	648	b66d115512ea956db9993f91a3349777.exe	cmd.exe
PID 648 wrote to memory of 3972	648	b66d115512ea956db9993f91a3349777.exe	cmd.exe
PID 648 wrote to memory of 3972	648	b66d115512ea956db9993f91a3349777.exe	cmd.exe
PID 648 wrote to memory of 2932	648	b66d115512ea956db9993f91a3349777.exe	cmd.exe
PID 648 wrote to memory of 2932	648	b66d115512ea956db9993f91a3349777.exe	cmd.exe
PID 648 wrote to memory of 2932	648	b66d115512ea956db9993f91a3349777.exe	cmd.exe
PID 648 wrote to memory of 2620	648	b66d115512ea956db9993f91a3349777.exe	sc.exe
PID 648 wrote to memory of 2620	648	b66d115512ea956db9993f91a3349777.exe	sc.exe
PID 648 wrote to memory of 2620	648	b66d115512ea956db9993f91a3349777.exe	sc.exe
PID 648 wrote to memory of 2220	648	b66d115512ea956db9993f91a3349777.exe	sc.exe
PID 648 wrote to memory of 2220	648	b66d115512ea956db9993f91a3349777.exe	sc.exe
PID 648 wrote to memory of 2220	648	b66d115512ea956db9993f91a3349777.exe	sc.exe
PID 648 wrote to memory of 3948	648	b66d115512ea956db9993f91a3349777.exe	sc.exe
PID 648 wrote to memory of 3948	648	b66d115512ea956db9993f91a3349777.exe	sc.exe
PID 648 wrote to memory of 3948	648	b66d115512ea956db9993f91a3349777.exe	sc.exe
PID 648 wrote to memory of 1528	648	b66d115512ea956db9993f91a3349777.exe	netsh.exe
PID 648 wrote to memory of 1528	648	b66d115512ea956db9993f91a3349777.exe	netsh.exe
PID 648 wrote to memory of 1528	648	b66d115512ea956db9993f91a3349777.exe	netsh.exe
PID 2240 wrote to memory of 2192	2240	kxloqqob.exe	svchost.exe
PID 2240 wrote to memory of 2192	2240	kxloqqob.exe	svchost.exe
PID 2240 wrote to memory of 2192	2240	kxloqqob.exe	svchost.exe
PID 2240 wrote to memory of 2192	2240	kxloqqob.exe	svchost.exe
PID 2240 wrote to memory of 2192	2240	kxloqqob.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\b66d115512ea956db9993f91a3349777.exe
"C:\Users\Admin\AppData\Local\Temp\b66d115512ea956db9993f91a3349777.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:648

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\otfdtnjc\
2⤵
PID:3972

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\kxloqqob.exe" C:\Windows\SysWOW64\otfdtnjc\
2⤵
PID:2932

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create otfdtnjc binPath= "C:\Windows\SysWOW64\otfdtnjc\kxloqqob.exe /d\"C:\Users\Admin\AppData\Local\Temp\b66d115512ea956db9993f91a3349777.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
PID:2620

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description otfdtnjc "wifi internet conection"
2⤵
PID:2220

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start otfdtnjc
2⤵
PID:3948

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:1528

C:\Windows\SysWOW64\otfdtnjc\kxloqqob.exe
C:\Windows\SysWOW64\otfdtnjc\kxloqqob.exe /d"C:\Users\Admin\AppData\Local\Temp\b66d115512ea956db9993f91a3349777.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2240

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Deletes itself
- Drops file in System32 directory
- Modifies data under HKEY_USERS
PID:2192

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\kxloqqob.exe
MD5
ad51abd9e4d267f75d2a932760c6e5d9

SHA1
3cf8a09fcb0376f6e65e808ed78a83b81d94a850

SHA256
aef59680213418bb133b80fd53d700127e41945f1c06d03e4f837d9623c686e2

SHA512
0a9bb8bd6db6496a98b5a4c64388941c191d4030403b5cad63282961c557121e94fbb313431f122e8018fc68d0e4a7550dedd220ea42219a4401b325ce449775

Download Submit
C:\Windows\SysWOW64\otfdtnjc\kxloqqob.exe
MD5
ad51abd9e4d267f75d2a932760c6e5d9

SHA1
3cf8a09fcb0376f6e65e808ed78a83b81d94a850

SHA256
aef59680213418bb133b80fd53d700127e41945f1c06d03e4f837d9623c686e2

SHA512
0a9bb8bd6db6496a98b5a4c64388941c191d4030403b5cad63282961c557121e94fbb313431f122e8018fc68d0e4a7550dedd220ea42219a4401b325ce449775

Download Submit
memory/1528-8-0x0000000000000000-mapping.dmp

Download
memory/2192-10-0x0000000000630000-0x0000000000645000-memory.dmp

Filesize
84KB

Download
memory/2192-11-0x0000000000639A6B-mapping.dmp

Download
memory/2220-6-0x0000000000000000-mapping.dmp

Download
memory/2620-5-0x0000000000000000-mapping.dmp

Download
memory/2932-3-0x0000000000000000-mapping.dmp

Download
memory/3948-7-0x0000000000000000-mapping.dmp

Download
memory/3972-2-0x0000000000000000-mapping.dmp

Download

Analysis

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