tofsee | b40c4e8d169abdd14c04db1958ad38c92340e78e436159723c530292d7cf601e

Analysis

max time kernel
150s
max time network
144s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
17/04/2024, 13:33

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General

Target

f379c2c732470dbce8e17423baf7f6fcca63bcb13c4ade33a15df1225e3841be.exe
Size

232KB
MD5

b5f3dc95c09fa3bfdf009a404736f94e
SHA1

03e471e7edf9bbcbe2483ebd1ba05364c93a190a
SHA256

f379c2c732470dbce8e17423baf7f6fcca63bcb13c4ade33a15df1225e3841be
SHA512

f63cba660384d5296e2f8aeeceba1a2d4707311a242cd5f12220008670cb5c2bf686b546fafe03cc6c5363bd62fe4c067a1f9dc73a8388488e13854b631ee546
SSDEEP

6144:j6zxC0r84BWnfZUH7SFcQU+9HFsvKMXOCU:kY0r9BeZUbSiy9HSvKwO

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

vanaheim.cn

jotunheim.name

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\uyjolxqt = "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
2448	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\uyjolxqt\ImagePath = "C:\\Windows\\SysWOW64\\uyjolxqt\\ugsxuazn.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2584	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2528	ugsxuazn.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\config\systemprofile:.repos	svchost.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile:.repos	svchost.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2528 set thread context of 2584	2528	ugsxuazn.exe	41

Launches sc.exe 3 IoCs

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

pid	Process
2560	sc.exe
2648	sc.exe
2808	sc.exe

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

System Information Discovery
T1082

Modifies data under HKEY_USERS 3 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\Control Panel\Buses	svchost.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Control Panel\Buses\Config0 = 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	svchost.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Control Panel\Buses\Config0 = 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	svchost.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1696 wrote to memory of 2036	1696	f379c2c732470dbce8e17423baf7f6fcca63bcb13c4ade33a15df1225e3841be.exe	28
PID 1696 wrote to memory of 2036	1696	f379c2c732470dbce8e17423baf7f6fcca63bcb13c4ade33a15df1225e3841be.exe	28
PID 1696 wrote to memory of 2036	1696	f379c2c732470dbce8e17423baf7f6fcca63bcb13c4ade33a15df1225e3841be.exe	28
PID 1696 wrote to memory of 2036	1696	f379c2c732470dbce8e17423baf7f6fcca63bcb13c4ade33a15df1225e3841be.exe	28
PID 1696 wrote to memory of 2912	1696	f379c2c732470dbce8e17423baf7f6fcca63bcb13c4ade33a15df1225e3841be.exe	30
PID 1696 wrote to memory of 2912	1696	f379c2c732470dbce8e17423baf7f6fcca63bcb13c4ade33a15df1225e3841be.exe	30
PID 1696 wrote to memory of 2912	1696	f379c2c732470dbce8e17423baf7f6fcca63bcb13c4ade33a15df1225e3841be.exe	30
PID 1696 wrote to memory of 2912	1696	f379c2c732470dbce8e17423baf7f6fcca63bcb13c4ade33a15df1225e3841be.exe	30
PID 1696 wrote to memory of 2560	1696	f379c2c732470dbce8e17423baf7f6fcca63bcb13c4ade33a15df1225e3841be.exe	32
PID 1696 wrote to memory of 2560	1696	f379c2c732470dbce8e17423baf7f6fcca63bcb13c4ade33a15df1225e3841be.exe	32
PID 1696 wrote to memory of 2560	1696	f379c2c732470dbce8e17423baf7f6fcca63bcb13c4ade33a15df1225e3841be.exe	32
PID 1696 wrote to memory of 2560	1696	f379c2c732470dbce8e17423baf7f6fcca63bcb13c4ade33a15df1225e3841be.exe	32
PID 1696 wrote to memory of 2648	1696	f379c2c732470dbce8e17423baf7f6fcca63bcb13c4ade33a15df1225e3841be.exe	34
PID 1696 wrote to memory of 2648	1696	f379c2c732470dbce8e17423baf7f6fcca63bcb13c4ade33a15df1225e3841be.exe	34
PID 1696 wrote to memory of 2648	1696	f379c2c732470dbce8e17423baf7f6fcca63bcb13c4ade33a15df1225e3841be.exe	34
PID 1696 wrote to memory of 2648	1696	f379c2c732470dbce8e17423baf7f6fcca63bcb13c4ade33a15df1225e3841be.exe	34
PID 1696 wrote to memory of 2808	1696	f379c2c732470dbce8e17423baf7f6fcca63bcb13c4ade33a15df1225e3841be.exe	36
PID 1696 wrote to memory of 2808	1696	f379c2c732470dbce8e17423baf7f6fcca63bcb13c4ade33a15df1225e3841be.exe	36
PID 1696 wrote to memory of 2808	1696	f379c2c732470dbce8e17423baf7f6fcca63bcb13c4ade33a15df1225e3841be.exe	36
PID 1696 wrote to memory of 2808	1696	f379c2c732470dbce8e17423baf7f6fcca63bcb13c4ade33a15df1225e3841be.exe	36
PID 1696 wrote to memory of 2448	1696	f379c2c732470dbce8e17423baf7f6fcca63bcb13c4ade33a15df1225e3841be.exe	39
PID 1696 wrote to memory of 2448	1696	f379c2c732470dbce8e17423baf7f6fcca63bcb13c4ade33a15df1225e3841be.exe	39
PID 1696 wrote to memory of 2448	1696	f379c2c732470dbce8e17423baf7f6fcca63bcb13c4ade33a15df1225e3841be.exe	39
PID 1696 wrote to memory of 2448	1696	f379c2c732470dbce8e17423baf7f6fcca63bcb13c4ade33a15df1225e3841be.exe	39
PID 2528 wrote to memory of 2584	2528	ugsxuazn.exe	41
PID 2528 wrote to memory of 2584	2528	ugsxuazn.exe	41
PID 2528 wrote to memory of 2584	2528	ugsxuazn.exe	41
PID 2528 wrote to memory of 2584	2528	ugsxuazn.exe	41
PID 2528 wrote to memory of 2584	2528	ugsxuazn.exe	41
PID 2528 wrote to memory of 2584	2528	ugsxuazn.exe	41

C:\Users\Admin\AppData\Local\Temp\f379c2c732470dbce8e17423baf7f6fcca63bcb13c4ade33a15df1225e3841be.exe
"C:\Users\Admin\AppData\Local\Temp\f379c2c732470dbce8e17423baf7f6fcca63bcb13c4ade33a15df1225e3841be.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1696
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\uyjolxqt\
  2⤵
  PID:2036
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ugsxuazn.exe" C:\Windows\SysWOW64\uyjolxqt\
  2⤵
  PID:2912
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create uyjolxqt binPath= "C:\Windows\SysWOW64\uyjolxqt\ugsxuazn.exe /d\"C:\Users\Admin\AppData\Local\Temp\f379c2c732470dbce8e17423baf7f6fcca63bcb13c4ade33a15df1225e3841be.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:2560
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description uyjolxqt "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:2648
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start uyjolxqt
  2⤵
  - Launches sc.exe
  PID:2808
- 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:2448

C:\Windows\SysWOW64\uyjolxqt\ugsxuazn.exe
C:\Windows\SysWOW64\uyjolxqt\ugsxuazn.exe /d"C:\Users\Admin\AppData\Local\Temp\f379c2c732470dbce8e17423baf7f6fcca63bcb13c4ade33a15df1225e3841be.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2528
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Windows security bypass
  - Sets service image path in registry
  - Deletes itself
  - Drops file in System32 directory
  - Modifies data under HKEY_USERS
  PID:2584

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\ugsxuazn.exe

Filesize
13.6MB

MD5
513ad32d18664b78e13df1300a38f088

SHA1
0b13ad0204fdeecf5e63d3c6f376e87f38e06594

SHA256
183cb441643a897f5a1dd1c884303789a4ef8c94724acdf13788605662fd1278

SHA512
5b08fd6c30f1ec64449069ba697ad7bb14db337621b13b1184762ef58e2f314e16c896a1ba541d8fd46ff6f0ec723e12f4af56cdcf8c6cf8fb69bd3971e9f48e

Download Submit
memory/1696-1-0x0000000000590000-0x0000000000690000-memory.dmp

Filesize
1024KB

Download
memory/1696-4-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/1696-3-0x0000000000240000-0x0000000000253000-memory.dmp

Filesize
76KB

Download
memory/1696-7-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/2528-10-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/2528-9-0x00000000005A0000-0x00000000006A0000-memory.dmp

Filesize
1024KB

Download
memory/2528-18-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/2584-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2584-11-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2584-14-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2584-19-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2584-17-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2584-20-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2584-22-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads