tofsee | 2dd88c2cf5f3ad49a46e6cfb88ec470423992ea5365fb55f7890af7e3d704662

Analysis

max time kernel
149s
max time network
145s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
11/03/2024, 17:03

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General

Target

c12142a8710fe99c29101f78dd31d5d7.exe
Size

13.5MB
MD5

c12142a8710fe99c29101f78dd31d5d7
SHA1

4c638ca8cdb0c581ba1323101b485973d724b917
SHA256

2dd88c2cf5f3ad49a46e6cfb88ec470423992ea5365fb55f7890af7e3d704662
SHA512

0944f49c54d4f488d55a477ff3767c72a3807148718e63745cf0795b570be48a7baf6fb3d5f19747918897c5cce588d1fcc60bbd6b91bfdc85de0546d9b64100
SSDEEP

49152:RT81MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMk:RT8

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

defeatwax.ru

refabyd.info

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee

Windows security bypass 2 TTPs 1 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\SysWOW64\utzutfqj = "0"	svchost.exe

Creates new service(s) 1 TTPs
persistence

Windows Service
T1543.003

Modifies Windows Firewall 2 TTPs 1 IoCs

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
2576	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\utzutfqj\ImagePath = "C:\\Windows\\SysWOW64\\utzutfqj\\gknjvebx.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2764	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2592	gknjvebx.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2592 set thread context of 2764	2592	gknjvebx.exe	41

Launches sc.exe 3 IoCs

Sc.exe is a Windows utlilty to control services on the system.

pid	Process
2416	sc.exe
2244	sc.exe
2652	sc.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2136 wrote to memory of 2172	2136	c12142a8710fe99c29101f78dd31d5d7.exe	28
PID 2136 wrote to memory of 2172	2136	c12142a8710fe99c29101f78dd31d5d7.exe	28
PID 2136 wrote to memory of 2172	2136	c12142a8710fe99c29101f78dd31d5d7.exe	28
PID 2136 wrote to memory of 2172	2136	c12142a8710fe99c29101f78dd31d5d7.exe	28
PID 2136 wrote to memory of 3052	2136	c12142a8710fe99c29101f78dd31d5d7.exe	30
PID 2136 wrote to memory of 3052	2136	c12142a8710fe99c29101f78dd31d5d7.exe	30
PID 2136 wrote to memory of 3052	2136	c12142a8710fe99c29101f78dd31d5d7.exe	30
PID 2136 wrote to memory of 3052	2136	c12142a8710fe99c29101f78dd31d5d7.exe	30
PID 2136 wrote to memory of 2416	2136	c12142a8710fe99c29101f78dd31d5d7.exe	32
PID 2136 wrote to memory of 2416	2136	c12142a8710fe99c29101f78dd31d5d7.exe	32
PID 2136 wrote to memory of 2416	2136	c12142a8710fe99c29101f78dd31d5d7.exe	32
PID 2136 wrote to memory of 2416	2136	c12142a8710fe99c29101f78dd31d5d7.exe	32
PID 2136 wrote to memory of 2244	2136	c12142a8710fe99c29101f78dd31d5d7.exe	34
PID 2136 wrote to memory of 2244	2136	c12142a8710fe99c29101f78dd31d5d7.exe	34
PID 2136 wrote to memory of 2244	2136	c12142a8710fe99c29101f78dd31d5d7.exe	34
PID 2136 wrote to memory of 2244	2136	c12142a8710fe99c29101f78dd31d5d7.exe	34
PID 2136 wrote to memory of 2652	2136	c12142a8710fe99c29101f78dd31d5d7.exe	36
PID 2136 wrote to memory of 2652	2136	c12142a8710fe99c29101f78dd31d5d7.exe	36
PID 2136 wrote to memory of 2652	2136	c12142a8710fe99c29101f78dd31d5d7.exe	36
PID 2136 wrote to memory of 2652	2136	c12142a8710fe99c29101f78dd31d5d7.exe	36
PID 2136 wrote to memory of 2576	2136	c12142a8710fe99c29101f78dd31d5d7.exe	39
PID 2136 wrote to memory of 2576	2136	c12142a8710fe99c29101f78dd31d5d7.exe	39
PID 2136 wrote to memory of 2576	2136	c12142a8710fe99c29101f78dd31d5d7.exe	39
PID 2136 wrote to memory of 2576	2136	c12142a8710fe99c29101f78dd31d5d7.exe	39
PID 2592 wrote to memory of 2764	2592	gknjvebx.exe	41
PID 2592 wrote to memory of 2764	2592	gknjvebx.exe	41
PID 2592 wrote to memory of 2764	2592	gknjvebx.exe	41
PID 2592 wrote to memory of 2764	2592	gknjvebx.exe	41
PID 2592 wrote to memory of 2764	2592	gknjvebx.exe	41
PID 2592 wrote to memory of 2764	2592	gknjvebx.exe	41

C:\Users\Admin\AppData\Local\Temp\c12142a8710fe99c29101f78dd31d5d7.exe
"C:\Users\Admin\AppData\Local\Temp\c12142a8710fe99c29101f78dd31d5d7.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2136
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\utzutfqj\
  2⤵
  PID:2172
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\gknjvebx.exe" C:\Windows\SysWOW64\utzutfqj\
  2⤵
  PID:3052
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create utzutfqj binPath= "C:\Windows\SysWOW64\utzutfqj\gknjvebx.exe /d\"C:\Users\Admin\AppData\Local\Temp\c12142a8710fe99c29101f78dd31d5d7.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:2416
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description utzutfqj "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:2244
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start utzutfqj
  2⤵
  - Launches sc.exe
  PID:2652
- 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:2576

C:\Windows\SysWOW64\utzutfqj\gknjvebx.exe
C:\Windows\SysWOW64\utzutfqj\gknjvebx.exe /d"C:\Users\Admin\AppData\Local\Temp\c12142a8710fe99c29101f78dd31d5d7.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2592
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Windows security bypass
  - Sets service image path in registry
  - Deletes itself
  PID:2764

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Defense Evasion

Impair Defenses

T1562

Disable or Modify System Firewall

T1562.004

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\gknjvebx.exe

Filesize
14.0MB

MD5
40052f50bac6b36662063a6c05c6bcce

SHA1
53e44da388d55c49d5ce3bf05eefdd609a0fc1b7

SHA256
672e03cdaac6f81fcf563e6b46810aefd9b81abbd346167f3b33f862da94bebe

SHA512
4240396d9497ee427d944c7d9b59497da044af6e6c4368331f2750aa158cd89b08d9bf36bb01c61cdd78ec94c097d1b67ca519674ded59a3fbbd97d701c5487a

Download Submit
C:\Windows\SysWOW64\utzutfqj\gknjvebx.exe

Filesize
4.7MB

MD5
0d60c2da5bcd0196c6db38434d80d133

SHA1
2e5ffe70d5dedf176b3adbf1dd9770e3492d1436

SHA256
944fbe1850f84a860d34375b84facd258167c0b8474edd7b18f712bc54db4d8e

SHA512
b58c5c4a8936a17b9be3283da07c43cd8914ea7dcb759d0adebafcc51b568be0dd9a262584a7098107db5e058ec5e7f2cffd41eaf70012c5be9d9155bf0b231f

Download Submit
memory/2136-2-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/2136-4-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/2136-8-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/2136-1-0x0000000000590000-0x0000000000690000-memory.dmp

Filesize
1024KB

Download
memory/2592-16-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/2592-9-0x0000000000560000-0x0000000000660000-memory.dmp

Filesize
1024KB

Download
memory/2592-10-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/2764-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2764-14-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2764-11-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2764-19-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2764-18-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2764-20-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2764-21-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads