tofsee | 7d89ddfb70a2246032a1ed4b908f7311f2808e11299967f08af6c748d336010a

General

Target

75c5cd21845d8d6b715fb5c86b58c5c7.exe
Size

11.0MB
MD5

75c5cd21845d8d6b715fb5c86b58c5c7
SHA1

492058c37438a6b93fa3c033b0b94c62af4cf7a7
SHA256

7d89ddfb70a2246032a1ed4b908f7311f2808e11299967f08af6c748d336010a
SHA512

d48abfcfddc8ab60efd35296dab49d7f3bfad4cf11a79fd58ab0824fddbd2e6993bf2164ae70f145d69907090cc9c2b4bb6987c4942030031944fe73f5b0d7fe

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:

pflefndm.exe

pid process

1088 pflefndm.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

556 svchost.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

pflefndm.exe

description pid process target process

PID 1088 set thread context of 556 1088 pflefndm.exe svchost.exe
Launches sc.exe
Sc.exe is a Windows utlilty to control services on the system.

pid	process
1088	pflefndm.exe

pid	process
556	svchost.exe

description	pid	process	target process
PID 1088 set thread context of 556	1088	pflefndm.exe	svchost.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

75c5cd21845d8d6b715fb5c86b58c5c7.exepflefndm.exe

description	pid	process	target process
PID 1668 wrote to memory of 1168	1668	75c5cd21845d8d6b715fb5c86b58c5c7.exe	cmd.exe
PID 1668 wrote to memory of 1168	1668	75c5cd21845d8d6b715fb5c86b58c5c7.exe	cmd.exe
PID 1668 wrote to memory of 1168	1668	75c5cd21845d8d6b715fb5c86b58c5c7.exe	cmd.exe
PID 1668 wrote to memory of 1168	1668	75c5cd21845d8d6b715fb5c86b58c5c7.exe	cmd.exe
PID 1668 wrote to memory of 1368	1668	75c5cd21845d8d6b715fb5c86b58c5c7.exe	cmd.exe
PID 1668 wrote to memory of 1368	1668	75c5cd21845d8d6b715fb5c86b58c5c7.exe	cmd.exe
PID 1668 wrote to memory of 1368	1668	75c5cd21845d8d6b715fb5c86b58c5c7.exe	cmd.exe
PID 1668 wrote to memory of 1368	1668	75c5cd21845d8d6b715fb5c86b58c5c7.exe	cmd.exe
PID 1668 wrote to memory of 316	1668	75c5cd21845d8d6b715fb5c86b58c5c7.exe	sc.exe
PID 1668 wrote to memory of 316	1668	75c5cd21845d8d6b715fb5c86b58c5c7.exe	sc.exe
PID 1668 wrote to memory of 316	1668	75c5cd21845d8d6b715fb5c86b58c5c7.exe	sc.exe
PID 1668 wrote to memory of 316	1668	75c5cd21845d8d6b715fb5c86b58c5c7.exe	sc.exe
PID 1668 wrote to memory of 1556	1668	75c5cd21845d8d6b715fb5c86b58c5c7.exe	sc.exe
PID 1668 wrote to memory of 1556	1668	75c5cd21845d8d6b715fb5c86b58c5c7.exe	sc.exe
PID 1668 wrote to memory of 1556	1668	75c5cd21845d8d6b715fb5c86b58c5c7.exe	sc.exe
PID 1668 wrote to memory of 1556	1668	75c5cd21845d8d6b715fb5c86b58c5c7.exe	sc.exe
PID 1668 wrote to memory of 892	1668	75c5cd21845d8d6b715fb5c86b58c5c7.exe	sc.exe
PID 1668 wrote to memory of 892	1668	75c5cd21845d8d6b715fb5c86b58c5c7.exe	sc.exe
PID 1668 wrote to memory of 892	1668	75c5cd21845d8d6b715fb5c86b58c5c7.exe	sc.exe
PID 1668 wrote to memory of 892	1668	75c5cd21845d8d6b715fb5c86b58c5c7.exe	sc.exe
PID 1668 wrote to memory of 1512	1668	75c5cd21845d8d6b715fb5c86b58c5c7.exe	netsh.exe
PID 1668 wrote to memory of 1512	1668	75c5cd21845d8d6b715fb5c86b58c5c7.exe	netsh.exe
PID 1668 wrote to memory of 1512	1668	75c5cd21845d8d6b715fb5c86b58c5c7.exe	netsh.exe
PID 1668 wrote to memory of 1512	1668	75c5cd21845d8d6b715fb5c86b58c5c7.exe	netsh.exe
PID 1088 wrote to memory of 556	1088	pflefndm.exe	svchost.exe
PID 1088 wrote to memory of 556	1088	pflefndm.exe	svchost.exe
PID 1088 wrote to memory of 556	1088	pflefndm.exe	svchost.exe
PID 1088 wrote to memory of 556	1088	pflefndm.exe	svchost.exe
PID 1088 wrote to memory of 556	1088	pflefndm.exe	svchost.exe
PID 1088 wrote to memory of 556	1088	pflefndm.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\75c5cd21845d8d6b715fb5c86b58c5c7.exe
"C:\Users\Admin\AppData\Local\Temp\75c5cd21845d8d6b715fb5c86b58c5c7.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1668

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\qbbyrnwe\
2⤵
PID:1168

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\pflefndm.exe" C:\Windows\SysWOW64\qbbyrnwe\
2⤵
PID:1368

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create qbbyrnwe binPath= "C:\Windows\SysWOW64\qbbyrnwe\pflefndm.exe /d\"C:\Users\Admin\AppData\Local\Temp\75c5cd21845d8d6b715fb5c86b58c5c7.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
PID:316

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description qbbyrnwe "wifi internet conection"
2⤵
PID:1556

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start qbbyrnwe
2⤵
PID:892

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:1512

C:\Windows\SysWOW64\qbbyrnwe\pflefndm.exe
C:\Windows\SysWOW64\qbbyrnwe\pflefndm.exe /d"C:\Users\Admin\AppData\Local\Temp\75c5cd21845d8d6b715fb5c86b58c5c7.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1088

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Deletes itself
PID:556

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\pflefndm.exe
MD5
25614d5e015ecc51284ed4f1884c4b50

SHA1
4fa844645aded26147f11203dab53b34cfefd282

SHA256
708a62dc5b180558d8addb0a708f19f8ba1cb5e75814ec7cd8cbf3ccca8e3481

SHA512
bc1786de64c6c81ddab19e03414925f59256556139c8d70c8a076e2370ab31e1639b3ee1f9fc02307d9b0060759a093c0bec1062744d630c836e92c346cd5cd5

Download Submit
C:\Windows\SysWOW64\qbbyrnwe\pflefndm.exe
MD5
25614d5e015ecc51284ed4f1884c4b50

SHA1
4fa844645aded26147f11203dab53b34cfefd282

SHA256
708a62dc5b180558d8addb0a708f19f8ba1cb5e75814ec7cd8cbf3ccca8e3481

SHA512
bc1786de64c6c81ddab19e03414925f59256556139c8d70c8a076e2370ab31e1639b3ee1f9fc02307d9b0060759a093c0bec1062744d630c836e92c346cd5cd5

Download Submit
memory/316-5-0x0000000000000000-mapping.dmp

Download
memory/556-10-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/556-11-0x0000000000089A6B-mapping.dmp

Download
memory/556-12-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/892-7-0x0000000000000000-mapping.dmp

Download
memory/1168-2-0x0000000000000000-mapping.dmp

Download
memory/1368-3-0x0000000000000000-mapping.dmp

Download
memory/1512-8-0x0000000000000000-mapping.dmp

Download
memory/1556-6-0x0000000000000000-mapping.dmp

Download

Analysis

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