tofsee | 241945fdc2d8e9d5dd8b40ae553d6c6a15a1b2ff3841f5fb174fc654832bad2e

General

Target

aec0249eb717fb18a6e5f6bbd811bb7c.exe
Size

11.3MB
MD5

aec0249eb717fb18a6e5f6bbd811bb7c
SHA1

b64f46fd11dd2a1b5d92a8f1f68103b8dfd4a550
SHA256

241945fdc2d8e9d5dd8b40ae553d6c6a15a1b2ff3841f5fb174fc654832bad2e
SHA512

28b23446cec58506ca056984897defe3a0dc6c2d2f159e51b56cbd61814c0ff36f61643dccf4bc0d8ccb44671d2cdc5a30d461aaeeb76021686f575668c0d132

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:

ctmpwjvu.exe

pid process

4060 ctmpwjvu.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

4040 svchost.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

ctmpwjvu.exe

description pid process target process

PID 4060 set thread context of 4040 4060 ctmpwjvu.exe svchost.exe
Launches sc.exe
Sc.exe is a Windows utlilty to control services on the system.

pid	process
4060	ctmpwjvu.exe

pid	process
4040	svchost.exe

description	pid	process	target process
PID 4060 set thread context of 4040	4060	ctmpwjvu.exe	svchost.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

aec0249eb717fb18a6e5f6bbd811bb7c.exectmpwjvu.exe

description	pid	process	target process
PID 2604 wrote to memory of 2916	2604	aec0249eb717fb18a6e5f6bbd811bb7c.exe	cmd.exe
PID 2604 wrote to memory of 2916	2604	aec0249eb717fb18a6e5f6bbd811bb7c.exe	cmd.exe
PID 2604 wrote to memory of 2916	2604	aec0249eb717fb18a6e5f6bbd811bb7c.exe	cmd.exe
PID 2604 wrote to memory of 2688	2604	aec0249eb717fb18a6e5f6bbd811bb7c.exe	cmd.exe
PID 2604 wrote to memory of 2688	2604	aec0249eb717fb18a6e5f6bbd811bb7c.exe	cmd.exe
PID 2604 wrote to memory of 2688	2604	aec0249eb717fb18a6e5f6bbd811bb7c.exe	cmd.exe
PID 2604 wrote to memory of 3020	2604	aec0249eb717fb18a6e5f6bbd811bb7c.exe	sc.exe
PID 2604 wrote to memory of 3020	2604	aec0249eb717fb18a6e5f6bbd811bb7c.exe	sc.exe
PID 2604 wrote to memory of 3020	2604	aec0249eb717fb18a6e5f6bbd811bb7c.exe	sc.exe
PID 2604 wrote to memory of 2756	2604	aec0249eb717fb18a6e5f6bbd811bb7c.exe	sc.exe
PID 2604 wrote to memory of 2756	2604	aec0249eb717fb18a6e5f6bbd811bb7c.exe	sc.exe
PID 2604 wrote to memory of 2756	2604	aec0249eb717fb18a6e5f6bbd811bb7c.exe	sc.exe
PID 2604 wrote to memory of 1344	2604	aec0249eb717fb18a6e5f6bbd811bb7c.exe	sc.exe
PID 2604 wrote to memory of 1344	2604	aec0249eb717fb18a6e5f6bbd811bb7c.exe	sc.exe
PID 2604 wrote to memory of 1344	2604	aec0249eb717fb18a6e5f6bbd811bb7c.exe	sc.exe
PID 2604 wrote to memory of 2180	2604	aec0249eb717fb18a6e5f6bbd811bb7c.exe	netsh.exe
PID 2604 wrote to memory of 2180	2604	aec0249eb717fb18a6e5f6bbd811bb7c.exe	netsh.exe
PID 2604 wrote to memory of 2180	2604	aec0249eb717fb18a6e5f6bbd811bb7c.exe	netsh.exe
PID 4060 wrote to memory of 4040	4060	ctmpwjvu.exe	svchost.exe
PID 4060 wrote to memory of 4040	4060	ctmpwjvu.exe	svchost.exe
PID 4060 wrote to memory of 4040	4060	ctmpwjvu.exe	svchost.exe
PID 4060 wrote to memory of 4040	4060	ctmpwjvu.exe	svchost.exe
PID 4060 wrote to memory of 4040	4060	ctmpwjvu.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\aec0249eb717fb18a6e5f6bbd811bb7c.exe
"C:\Users\Admin\AppData\Local\Temp\aec0249eb717fb18a6e5f6bbd811bb7c.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2604

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\jvzaiuaz\
2⤵
PID:2916

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ctmpwjvu.exe" C:\Windows\SysWOW64\jvzaiuaz\
2⤵
PID:2688

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create jvzaiuaz binPath= "C:\Windows\SysWOW64\jvzaiuaz\ctmpwjvu.exe /d\"C:\Users\Admin\AppData\Local\Temp\aec0249eb717fb18a6e5f6bbd811bb7c.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
PID:3020

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description jvzaiuaz "wifi internet conection"
2⤵
PID:2756

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start jvzaiuaz
2⤵
PID:1344

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:2180

C:\Windows\SysWOW64\jvzaiuaz\ctmpwjvu.exe
C:\Windows\SysWOW64\jvzaiuaz\ctmpwjvu.exe /d"C:\Users\Admin\AppData\Local\Temp\aec0249eb717fb18a6e5f6bbd811bb7c.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4060

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Deletes itself
PID:4040

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\ctmpwjvu.exe
MD5
6c97b4e57d150cfd571a1ac9e1f60841

SHA1
3ece499d513a48210ae02345142df2eadcacbf47

SHA256
9a5dbc1aaaab4b9c44b8014c7b200e07335ec28b3d1c5ab0384093229ec6f028

SHA512
c663d1ac2c9eb0540581d9daf753cf137e6f95ca12dc899cb159e364795cd1880714a5b46bd4f7e1245b31d13f09bd797dc4eb4f2cdabfe9d9d9ffef688c61e4

Download Submit
C:\Windows\SysWOW64\jvzaiuaz\ctmpwjvu.exe
MD5
6c97b4e57d150cfd571a1ac9e1f60841

SHA1
3ece499d513a48210ae02345142df2eadcacbf47

SHA256
9a5dbc1aaaab4b9c44b8014c7b200e07335ec28b3d1c5ab0384093229ec6f028

SHA512
c663d1ac2c9eb0540581d9daf753cf137e6f95ca12dc899cb159e364795cd1880714a5b46bd4f7e1245b31d13f09bd797dc4eb4f2cdabfe9d9d9ffef688c61e4

Download Submit
memory/1344-7-0x0000000000000000-mapping.dmp

Download
memory/2180-8-0x0000000000000000-mapping.dmp

Download
memory/2688-3-0x0000000000000000-mapping.dmp

Download
memory/2756-6-0x0000000000000000-mapping.dmp

Download
memory/2916-2-0x0000000000000000-mapping.dmp

Download
memory/3020-5-0x0000000000000000-mapping.dmp

Download
memory/4040-10-0x0000000002F60000-0x0000000002F75000-memory.dmp

Filesize
84KB

Download
memory/4040-11-0x0000000002F69A6B-mapping.dmp

Download
memory/4040-12-0x0000000002F60000-0x0000000002F75000-memory.dmp

Filesize
84KB

Download

Analysis

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