tofsee | 09e707025066b12df30cef409b036a8e74e9ef66c9ea1398bee9bdce3b4d0d1b

General

Target

1fa3e0cc0442dbb6f0fcfe20ee1aba66.exe
Size

12.9MB
MD5

1fa3e0cc0442dbb6f0fcfe20ee1aba66
SHA1

423fbcc2ee9b37cb6878ce0a57f4d008b6d06ce5
SHA256

09e707025066b12df30cef409b036a8e74e9ef66c9ea1398bee9bdce3b4d0d1b
SHA512

447bb43df9d5dab44aba597de97889c15350a517fcef456d378347f77623043b9b215f3e022e97630b776d887e5c03a09b0d444d1d7d5a45bdb2b4f488477a95

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:

jiyubxc.exe

pid process

804 jiyubxc.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

324 svchost.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

jiyubxc.exe

description pid process target process

PID 804 set thread context of 324 804 jiyubxc.exe svchost.exe
Launches sc.exe
Sc.exe is a Windows utlilty to control services on the system.

pid	process
804	jiyubxc.exe

pid	process
324	svchost.exe

description	pid	process	target process
PID 804 set thread context of 324	804	jiyubxc.exe	svchost.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

1fa3e0cc0442dbb6f0fcfe20ee1aba66.exejiyubxc.exe

description	pid	process	target process
PID 1152 wrote to memory of 2040	1152	1fa3e0cc0442dbb6f0fcfe20ee1aba66.exe	cmd.exe
PID 1152 wrote to memory of 2040	1152	1fa3e0cc0442dbb6f0fcfe20ee1aba66.exe	cmd.exe
PID 1152 wrote to memory of 2040	1152	1fa3e0cc0442dbb6f0fcfe20ee1aba66.exe	cmd.exe
PID 1152 wrote to memory of 2040	1152	1fa3e0cc0442dbb6f0fcfe20ee1aba66.exe	cmd.exe
PID 1152 wrote to memory of 1828	1152	1fa3e0cc0442dbb6f0fcfe20ee1aba66.exe	cmd.exe
PID 1152 wrote to memory of 1828	1152	1fa3e0cc0442dbb6f0fcfe20ee1aba66.exe	cmd.exe
PID 1152 wrote to memory of 1828	1152	1fa3e0cc0442dbb6f0fcfe20ee1aba66.exe	cmd.exe
PID 1152 wrote to memory of 1828	1152	1fa3e0cc0442dbb6f0fcfe20ee1aba66.exe	cmd.exe
PID 1152 wrote to memory of 1532	1152	1fa3e0cc0442dbb6f0fcfe20ee1aba66.exe	sc.exe
PID 1152 wrote to memory of 1532	1152	1fa3e0cc0442dbb6f0fcfe20ee1aba66.exe	sc.exe
PID 1152 wrote to memory of 1532	1152	1fa3e0cc0442dbb6f0fcfe20ee1aba66.exe	sc.exe
PID 1152 wrote to memory of 1532	1152	1fa3e0cc0442dbb6f0fcfe20ee1aba66.exe	sc.exe
PID 1152 wrote to memory of 1744	1152	1fa3e0cc0442dbb6f0fcfe20ee1aba66.exe	sc.exe
PID 1152 wrote to memory of 1744	1152	1fa3e0cc0442dbb6f0fcfe20ee1aba66.exe	sc.exe
PID 1152 wrote to memory of 1744	1152	1fa3e0cc0442dbb6f0fcfe20ee1aba66.exe	sc.exe
PID 1152 wrote to memory of 1744	1152	1fa3e0cc0442dbb6f0fcfe20ee1aba66.exe	sc.exe
PID 1152 wrote to memory of 1380	1152	1fa3e0cc0442dbb6f0fcfe20ee1aba66.exe	sc.exe
PID 1152 wrote to memory of 1380	1152	1fa3e0cc0442dbb6f0fcfe20ee1aba66.exe	sc.exe
PID 1152 wrote to memory of 1380	1152	1fa3e0cc0442dbb6f0fcfe20ee1aba66.exe	sc.exe
PID 1152 wrote to memory of 1380	1152	1fa3e0cc0442dbb6f0fcfe20ee1aba66.exe	sc.exe
PID 804 wrote to memory of 324	804	jiyubxc.exe	svchost.exe
PID 804 wrote to memory of 324	804	jiyubxc.exe	svchost.exe
PID 804 wrote to memory of 324	804	jiyubxc.exe	svchost.exe
PID 804 wrote to memory of 324	804	jiyubxc.exe	svchost.exe
PID 804 wrote to memory of 324	804	jiyubxc.exe	svchost.exe
PID 804 wrote to memory of 324	804	jiyubxc.exe	svchost.exe
PID 1152 wrote to memory of 1460	1152	1fa3e0cc0442dbb6f0fcfe20ee1aba66.exe	netsh.exe
PID 1152 wrote to memory of 1460	1152	1fa3e0cc0442dbb6f0fcfe20ee1aba66.exe	netsh.exe
PID 1152 wrote to memory of 1460	1152	1fa3e0cc0442dbb6f0fcfe20ee1aba66.exe	netsh.exe
PID 1152 wrote to memory of 1460	1152	1fa3e0cc0442dbb6f0fcfe20ee1aba66.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\1fa3e0cc0442dbb6f0fcfe20ee1aba66.exe
"C:\Users\Admin\AppData\Local\Temp\1fa3e0cc0442dbb6f0fcfe20ee1aba66.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1152

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\xkcizjfs\
2⤵
PID:2040

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\jiyubxc.exe" C:\Windows\SysWOW64\xkcizjfs\
2⤵
PID:1828

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create xkcizjfs binPath= "C:\Windows\SysWOW64\xkcizjfs\jiyubxc.exe /d\"C:\Users\Admin\AppData\Local\Temp\1fa3e0cc0442dbb6f0fcfe20ee1aba66.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
PID:1532

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description xkcizjfs "wifi internet conection"
2⤵
PID:1744

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start xkcizjfs
2⤵
PID:1380

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:1460

C:\Windows\SysWOW64\xkcizjfs\jiyubxc.exe
C:\Windows\SysWOW64\xkcizjfs\jiyubxc.exe /d"C:\Users\Admin\AppData\Local\Temp\1fa3e0cc0442dbb6f0fcfe20ee1aba66.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:804

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Deletes itself
PID:324

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\jiyubxc.exe
MD5
2c241b3a0c3d314a62d7361542f2f49c

SHA1
be105e70665b3e29ccc60ba7e2cb23b28c8ab172

SHA256
4360ff50c7768a0192ef5caed41c37e2d83f17235a34be158e3c1ceb9985ea68

SHA512
8d38dd7c5cd943511bf3700d78688f2f4717d51e595e2ff1642718f2550f2d6d4e33bd448d0c5fd83c1c8e3e62f6d3002cebbba88464e2430bb2ee41b74b48f8

Download Submit
C:\Windows\SysWOW64\xkcizjfs\jiyubxc.exe
MD5
2c241b3a0c3d314a62d7361542f2f49c

SHA1
be105e70665b3e29ccc60ba7e2cb23b28c8ab172

SHA256
4360ff50c7768a0192ef5caed41c37e2d83f17235a34be158e3c1ceb9985ea68

SHA512
8d38dd7c5cd943511bf3700d78688f2f4717d51e595e2ff1642718f2550f2d6d4e33bd448d0c5fd83c1c8e3e62f6d3002cebbba88464e2430bb2ee41b74b48f8

Download Submit
memory/324-9-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/324-10-0x00000000000C9A6B-mapping.dmp

Download
memory/1380-7-0x0000000000000000-mapping.dmp

Download
memory/1460-12-0x0000000000000000-mapping.dmp

Download
memory/1532-5-0x0000000000000000-mapping.dmp

Download
memory/1744-6-0x0000000000000000-mapping.dmp

Download
memory/1828-3-0x0000000000000000-mapping.dmp

Download
memory/2040-2-0x0000000000000000-mapping.dmp

Download

Analysis

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