tofsee | 5527e07895f412771ae4350dfa825e5d08140073600ebd6aa321276b737cc839

General

Target

5527e07895f412771ae4350dfa825e5d08140073600ebd6aa321276b737cc839.exe
Size

106KB
MD5

8c122278e768601f20f1e9f6c407cce2
SHA1

a3f99a111ad0a22614a10337ef807607262aea61
SHA256

5527e07895f412771ae4350dfa825e5d08140073600ebd6aa321276b737cc839
SHA512

11a1e995193b09ca342bb7a0c3203c0a41b7d83260666b8ac460c14c7c74c8683b00e407ddb97cceba87fb442635807b70eb9581326f886e6b673bee72096173

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

43.231.4.7

lazystax.ru

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee
Creates new service(s) 1 TTPs
persistence

New Service
T1050
Executes dropped EXE 1 IoCs

Processes:

jiyubxc.exe

pid process

1708 jiyubxc.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

956 netsh.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

jiyubxc.exe

description pid process target process

PID 1708 set thread context of 1932 1708 jiyubxc.exe svchost.exe
Launches sc.exe 3 IoCs
Sc.exe is a Windows utlilty to control services on the system.

Processes:

sc.exesc.exesc.exe

pid process

1592 sc.exe
1356 sc.exe
1728 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

pid	process
1708	jiyubxc.exe

pid	process
956	netsh.exe

description	pid	process	target process
PID 1708 set thread context of 1932	1708	jiyubxc.exe	svchost.exe

pid	process
1592	sc.exe
1356	sc.exe
1728	sc.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

5527e07895f412771ae4350dfa825e5d08140073600ebd6aa321276b737cc839.exejiyubxc.exe

description	pid	process	target process
PID 2004 wrote to memory of 1952	2004	5527e07895f412771ae4350dfa825e5d08140073600ebd6aa321276b737cc839.exe	cmd.exe
PID 2004 wrote to memory of 1952	2004	5527e07895f412771ae4350dfa825e5d08140073600ebd6aa321276b737cc839.exe	cmd.exe
PID 2004 wrote to memory of 1952	2004	5527e07895f412771ae4350dfa825e5d08140073600ebd6aa321276b737cc839.exe	cmd.exe
PID 2004 wrote to memory of 1952	2004	5527e07895f412771ae4350dfa825e5d08140073600ebd6aa321276b737cc839.exe	cmd.exe
PID 2004 wrote to memory of 1548	2004	5527e07895f412771ae4350dfa825e5d08140073600ebd6aa321276b737cc839.exe	cmd.exe
PID 2004 wrote to memory of 1548	2004	5527e07895f412771ae4350dfa825e5d08140073600ebd6aa321276b737cc839.exe	cmd.exe
PID 2004 wrote to memory of 1548	2004	5527e07895f412771ae4350dfa825e5d08140073600ebd6aa321276b737cc839.exe	cmd.exe
PID 2004 wrote to memory of 1548	2004	5527e07895f412771ae4350dfa825e5d08140073600ebd6aa321276b737cc839.exe	cmd.exe
PID 2004 wrote to memory of 1592	2004	5527e07895f412771ae4350dfa825e5d08140073600ebd6aa321276b737cc839.exe	sc.exe
PID 2004 wrote to memory of 1592	2004	5527e07895f412771ae4350dfa825e5d08140073600ebd6aa321276b737cc839.exe	sc.exe
PID 2004 wrote to memory of 1592	2004	5527e07895f412771ae4350dfa825e5d08140073600ebd6aa321276b737cc839.exe	sc.exe
PID 2004 wrote to memory of 1592	2004	5527e07895f412771ae4350dfa825e5d08140073600ebd6aa321276b737cc839.exe	sc.exe
PID 2004 wrote to memory of 1356	2004	5527e07895f412771ae4350dfa825e5d08140073600ebd6aa321276b737cc839.exe	sc.exe
PID 2004 wrote to memory of 1356	2004	5527e07895f412771ae4350dfa825e5d08140073600ebd6aa321276b737cc839.exe	sc.exe
PID 2004 wrote to memory of 1356	2004	5527e07895f412771ae4350dfa825e5d08140073600ebd6aa321276b737cc839.exe	sc.exe
PID 2004 wrote to memory of 1356	2004	5527e07895f412771ae4350dfa825e5d08140073600ebd6aa321276b737cc839.exe	sc.exe
PID 2004 wrote to memory of 1728	2004	5527e07895f412771ae4350dfa825e5d08140073600ebd6aa321276b737cc839.exe	sc.exe
PID 2004 wrote to memory of 1728	2004	5527e07895f412771ae4350dfa825e5d08140073600ebd6aa321276b737cc839.exe	sc.exe
PID 2004 wrote to memory of 1728	2004	5527e07895f412771ae4350dfa825e5d08140073600ebd6aa321276b737cc839.exe	sc.exe
PID 2004 wrote to memory of 1728	2004	5527e07895f412771ae4350dfa825e5d08140073600ebd6aa321276b737cc839.exe	sc.exe
PID 1708 wrote to memory of 1932	1708	jiyubxc.exe	svchost.exe
PID 1708 wrote to memory of 1932	1708	jiyubxc.exe	svchost.exe
PID 1708 wrote to memory of 1932	1708	jiyubxc.exe	svchost.exe
PID 1708 wrote to memory of 1932	1708	jiyubxc.exe	svchost.exe
PID 1708 wrote to memory of 1932	1708	jiyubxc.exe	svchost.exe
PID 1708 wrote to memory of 1932	1708	jiyubxc.exe	svchost.exe
PID 2004 wrote to memory of 956	2004	5527e07895f412771ae4350dfa825e5d08140073600ebd6aa321276b737cc839.exe	netsh.exe
PID 2004 wrote to memory of 956	2004	5527e07895f412771ae4350dfa825e5d08140073600ebd6aa321276b737cc839.exe	netsh.exe
PID 2004 wrote to memory of 956	2004	5527e07895f412771ae4350dfa825e5d08140073600ebd6aa321276b737cc839.exe	netsh.exe
PID 2004 wrote to memory of 956	2004	5527e07895f412771ae4350dfa825e5d08140073600ebd6aa321276b737cc839.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\5527e07895f412771ae4350dfa825e5d08140073600ebd6aa321276b737cc839.exe
"C:\Users\Admin\AppData\Local\Temp\5527e07895f412771ae4350dfa825e5d08140073600ebd6aa321276b737cc839.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2004

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\otwilode\
2⤵
PID:1952

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\jiyubxc.exe" C:\Windows\SysWOW64\otwilode\
2⤵
PID:1548

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create otwilode binPath= "C:\Windows\SysWOW64\otwilode\jiyubxc.exe /d\"C:\Users\Admin\AppData\Local\Temp\5527e07895f412771ae4350dfa825e5d08140073600ebd6aa321276b737cc839.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:1592

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description otwilode "wifi internet conection"
2⤵
- Launches sc.exe
PID:1356

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start otwilode
2⤵
- Launches sc.exe
PID:1728

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⤵
- Modifies Windows Firewall
PID:956

C:\Windows\SysWOW64\otwilode\jiyubxc.exe
C:\Windows\SysWOW64\otwilode\jiyubxc.exe /d"C:\Users\Admin\AppData\Local\Temp\5527e07895f412771ae4350dfa825e5d08140073600ebd6aa321276b737cc839.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1708

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
PID:1932

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

New Service

1

T1050

Modify Existing Service

1

T1031

Privilege Escalation

New Service

1

T1050

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\jiyubxc.exe
Filesize
11.6MB

MD5
74b0cbe867ff9f257aec48c11542ed5d

SHA1
ea7ed383c29cc1a7f02d710a5023fd0a44c5e828

SHA256
6050f9e54094d530c93c3d761a4a094e369127ac3638c5e1081bf2a068bbaae0

SHA512
1d4b7225bd3db5422169a3402af00e3c837f3982b4b9e078364e53ceaff4ee84a4cc5ec5584af53cbb95daee1b0b0e51432bfce0fe62cb2cd47dd85015155aca

Download Submit
C:\Windows\SysWOW64\otwilode\jiyubxc.exe
Filesize
11.6MB

MD5
74b0cbe867ff9f257aec48c11542ed5d

SHA1
ea7ed383c29cc1a7f02d710a5023fd0a44c5e828

SHA256
6050f9e54094d530c93c3d761a4a094e369127ac3638c5e1081bf2a068bbaae0

SHA512
1d4b7225bd3db5422169a3402af00e3c837f3982b4b9e078364e53ceaff4ee84a4cc5ec5584af53cbb95daee1b0b0e51432bfce0fe62cb2cd47dd85015155aca

Download Submit
memory/956-73-0x0000000000000000-mapping.dmp

Download
memory/1356-61-0x0000000000000000-mapping.dmp

Download
memory/1548-58-0x0000000000000000-mapping.dmp

Download
memory/1592-60-0x0000000000000000-mapping.dmp

Download
memory/1708-64-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/1708-65-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/1728-62-0x0000000000000000-mapping.dmp

Download
memory/1932-67-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1932-69-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1932-70-0x0000000000089A6B-mapping.dmp

Download
memory/1952-57-0x0000000000000000-mapping.dmp

Download
memory/2004-54-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/2004-56-0x00000000765D1000-0x00000000765D3000-memory.dmp

Filesize
8KB

Download
memory/2004-55-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download

Analysis

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