tofsee | c36c064e1cf65d9e7acdd02967eb67475f83eb722efe3fd8e1767ccde84b32d1

General

Target

13dc59ee41ac76115d4fa94d41ea9f4e.exe
Size

13.6MB
MD5

13dc59ee41ac76115d4fa94d41ea9f4e
SHA1

63176b69b4a959e85ef1c391e4e090048e60a127
SHA256

c36c064e1cf65d9e7acdd02967eb67475f83eb722efe3fd8e1767ccde84b32d1
SHA512

f1a9f58f353bd5b265ac2b8461e740b2cd43b447a37acddb9f401e139f352259b711fd4f64abfb8d4ac7390f70cfe6e72c36c04c6b762868d92d0c7081df8c03

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:

gjrrpnra.exe

pid process

1172 gjrrpnra.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

1460 svchost.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

gjrrpnra.exe

description pid process target process

PID 1172 set thread context of 1460 1172 gjrrpnra.exe svchost.exe
Launches sc.exe
Sc.exe is a Windows utlilty to control services on the system.

pid	process
1172	gjrrpnra.exe

pid	process
1460	svchost.exe

description	pid	process	target process
PID 1172 set thread context of 1460	1172	gjrrpnra.exe	svchost.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

13dc59ee41ac76115d4fa94d41ea9f4e.exegjrrpnra.exe

description	pid	process	target process
PID 508 wrote to memory of 3000	508	13dc59ee41ac76115d4fa94d41ea9f4e.exe	cmd.exe
PID 508 wrote to memory of 3000	508	13dc59ee41ac76115d4fa94d41ea9f4e.exe	cmd.exe
PID 508 wrote to memory of 3000	508	13dc59ee41ac76115d4fa94d41ea9f4e.exe	cmd.exe
PID 508 wrote to memory of 3556	508	13dc59ee41ac76115d4fa94d41ea9f4e.exe	cmd.exe
PID 508 wrote to memory of 3556	508	13dc59ee41ac76115d4fa94d41ea9f4e.exe	cmd.exe
PID 508 wrote to memory of 3556	508	13dc59ee41ac76115d4fa94d41ea9f4e.exe	cmd.exe
PID 508 wrote to memory of 4076	508	13dc59ee41ac76115d4fa94d41ea9f4e.exe	sc.exe
PID 508 wrote to memory of 4076	508	13dc59ee41ac76115d4fa94d41ea9f4e.exe	sc.exe
PID 508 wrote to memory of 4076	508	13dc59ee41ac76115d4fa94d41ea9f4e.exe	sc.exe
PID 508 wrote to memory of 4060	508	13dc59ee41ac76115d4fa94d41ea9f4e.exe	sc.exe
PID 508 wrote to memory of 4060	508	13dc59ee41ac76115d4fa94d41ea9f4e.exe	sc.exe
PID 508 wrote to memory of 4060	508	13dc59ee41ac76115d4fa94d41ea9f4e.exe	sc.exe
PID 508 wrote to memory of 3936	508	13dc59ee41ac76115d4fa94d41ea9f4e.exe	sc.exe
PID 508 wrote to memory of 3936	508	13dc59ee41ac76115d4fa94d41ea9f4e.exe	sc.exe
PID 508 wrote to memory of 3936	508	13dc59ee41ac76115d4fa94d41ea9f4e.exe	sc.exe
PID 508 wrote to memory of 3384	508	13dc59ee41ac76115d4fa94d41ea9f4e.exe	netsh.exe
PID 508 wrote to memory of 3384	508	13dc59ee41ac76115d4fa94d41ea9f4e.exe	netsh.exe
PID 508 wrote to memory of 3384	508	13dc59ee41ac76115d4fa94d41ea9f4e.exe	netsh.exe
PID 1172 wrote to memory of 1460	1172	gjrrpnra.exe	svchost.exe
PID 1172 wrote to memory of 1460	1172	gjrrpnra.exe	svchost.exe
PID 1172 wrote to memory of 1460	1172	gjrrpnra.exe	svchost.exe
PID 1172 wrote to memory of 1460	1172	gjrrpnra.exe	svchost.exe
PID 1172 wrote to memory of 1460	1172	gjrrpnra.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\13dc59ee41ac76115d4fa94d41ea9f4e.exe
"C:\Users\Admin\AppData\Local\Temp\13dc59ee41ac76115d4fa94d41ea9f4e.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:508

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\osizndri\
2⤵
PID:3000

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\gjrrpnra.exe" C:\Windows\SysWOW64\osizndri\
2⤵
PID:3556

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create osizndri binPath= "C:\Windows\SysWOW64\osizndri\gjrrpnra.exe /d\"C:\Users\Admin\AppData\Local\Temp\13dc59ee41ac76115d4fa94d41ea9f4e.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
PID:4076

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description osizndri "wifi internet conection"
2⤵
PID:4060

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start osizndri
2⤵
PID:3936

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:3384

C:\Windows\SysWOW64\osizndri\gjrrpnra.exe
C:\Windows\SysWOW64\osizndri\gjrrpnra.exe /d"C:\Users\Admin\AppData\Local\Temp\13dc59ee41ac76115d4fa94d41ea9f4e.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1172

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Deletes itself
PID:1460

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\gjrrpnra.exe
MD5
b2a075ab2b2381ff2fc3c396bd4dc554

SHA1
6ba1693eede3061795ea1fdeab783c92b1d8b21c

SHA256
9ddfcae3a731e840b7552d166112ce23a88806d9ff9769984c34ea974db07fb2

SHA512
6e671670c557775201f2258a26ce5f7a90b86aca00c9032c6012ab1a66cb62f8f02f56f26056e2aac43cb3f00609593d4a9eb02bd3bdf4a22dd7f7b405791c3d

Download Submit
C:\Windows\SysWOW64\osizndri\gjrrpnra.exe
MD5
b2a075ab2b2381ff2fc3c396bd4dc554

SHA1
6ba1693eede3061795ea1fdeab783c92b1d8b21c

SHA256
9ddfcae3a731e840b7552d166112ce23a88806d9ff9769984c34ea974db07fb2

SHA512
6e671670c557775201f2258a26ce5f7a90b86aca00c9032c6012ab1a66cb62f8f02f56f26056e2aac43cb3f00609593d4a9eb02bd3bdf4a22dd7f7b405791c3d

Download Submit
memory/1460-10-0x00000000005E0000-0x00000000005F5000-memory.dmp

Filesize
84KB

Download
memory/1460-11-0x00000000005E9A6B-mapping.dmp

Download
memory/3000-2-0x0000000000000000-mapping.dmp

Download
memory/3384-8-0x0000000000000000-mapping.dmp

Download
memory/3556-3-0x0000000000000000-mapping.dmp

Download
memory/3936-7-0x0000000000000000-mapping.dmp

Download
memory/4060-6-0x0000000000000000-mapping.dmp

Download
memory/4076-5-0x0000000000000000-mapping.dmp

Download

Analysis

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