tofsee | e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f

Analysis

max time kernel
119s
max time network
122s
platform
windows7_x64
resource
win7-20241023-en
resource tags

arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-x64system
submitted
20-11-2024 19:57

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General

Target

e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f.exe
Size

13.9MB
MD5

74d022d0ed2f393fe0b210879b3456bb
SHA1

ae369acf20264ab7cb35b3301b12b14ad6e71d73
SHA256

e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f
SHA512

1ab7e4dd174754e0187e31149ec93c56f1a495bc4c4c815737df4d01d19eb50c9533bd947ccef75c3344bc17de62103ffa157e8c8a1cad9b8b60badd784b95a0
SSDEEP

393216:BMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMl:BMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMl

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

quadoil.ru

lakeflex.ru

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee
Tofsee family
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\cvgnxeep = "0"	svchost.exe

Creates new service(s) 2 TTPs
persistence execution

Windows Service
T1543.003

Service Execution
T1569.002

Modifies Windows Firewall 2 TTPs 1 IoCs

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
2296	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\cvgnxeep\ImagePath = "C:\\Windows\\SysWOW64\\cvgnxeep\\uhqnotfs.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
1488	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1032	uhqnotfs.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1032 set thread context of 1488	1032	uhqnotfs.exe	43

Launches sc.exe 3 IoCs

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

pid	Process
3004	sc.exe
2116	sc.exe
2660	sc.exe

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

System Information Discovery
T1082

Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

persistence privilege_escalation

Netsh Helper DLL

T1546.007

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh	netsh.exe
Key queried	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh	netsh.exe

System Location Discovery: System Language Discovery 1 TTPs 9 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	uhqnotfs.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2836 wrote to memory of 2760	2836	e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f.exe	30
PID 2836 wrote to memory of 2760	2836	e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f.exe	30
PID 2836 wrote to memory of 2760	2836	e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f.exe	30
PID 2836 wrote to memory of 2760	2836	e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f.exe	30
PID 2836 wrote to memory of 2788	2836	e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f.exe	32
PID 2836 wrote to memory of 2788	2836	e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f.exe	32
PID 2836 wrote to memory of 2788	2836	e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f.exe	32
PID 2836 wrote to memory of 2788	2836	e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f.exe	32
PID 2836 wrote to memory of 3004	2836	e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f.exe	34
PID 2836 wrote to memory of 3004	2836	e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f.exe	34
PID 2836 wrote to memory of 3004	2836	e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f.exe	34
PID 2836 wrote to memory of 3004	2836	e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f.exe	34
PID 2836 wrote to memory of 2116	2836	e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f.exe	36
PID 2836 wrote to memory of 2116	2836	e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f.exe	36
PID 2836 wrote to memory of 2116	2836	e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f.exe	36
PID 2836 wrote to memory of 2116	2836	e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f.exe	36
PID 2836 wrote to memory of 2660	2836	e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f.exe	38
PID 2836 wrote to memory of 2660	2836	e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f.exe	38
PID 2836 wrote to memory of 2660	2836	e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f.exe	38
PID 2836 wrote to memory of 2660	2836	e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f.exe	38
PID 2836 wrote to memory of 2296	2836	e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f.exe	41
PID 2836 wrote to memory of 2296	2836	e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f.exe	41
PID 2836 wrote to memory of 2296	2836	e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f.exe	41
PID 2836 wrote to memory of 2296	2836	e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f.exe	41
PID 1032 wrote to memory of 1488	1032	uhqnotfs.exe	43
PID 1032 wrote to memory of 1488	1032	uhqnotfs.exe	43
PID 1032 wrote to memory of 1488	1032	uhqnotfs.exe	43
PID 1032 wrote to memory of 1488	1032	uhqnotfs.exe	43
PID 1032 wrote to memory of 1488	1032	uhqnotfs.exe	43
PID 1032 wrote to memory of 1488	1032	uhqnotfs.exe	43

C:\Users\Admin\AppData\Local\Temp\e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f.exe
"C:\Users\Admin\AppData\Local\Temp\e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2836
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\cvgnxeep\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2760
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\uhqnotfs.exe" C:\Windows\SysWOW64\cvgnxeep\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2788
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create cvgnxeep binPath= "C:\Windows\SysWOW64\cvgnxeep\uhqnotfs.exe /d\"C:\Users\Admin\AppData\Local\Temp\e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3004
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description cvgnxeep "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2116
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start cvgnxeep
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2660
- 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
  - Event Triggered Execution: Netsh Helper DLL
  - System Location Discovery: System Language Discovery
  PID:2296

C:\Windows\SysWOW64\cvgnxeep\uhqnotfs.exe
C:\Windows\SysWOW64\cvgnxeep\uhqnotfs.exe /d"C:\Users\Admin\AppData\Local\Temp\e4e8ef55981e665421399aadfd906c81d0dae7bf88b8f31f2979f4faa88fc46f.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1032
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Windows security bypass
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:1488

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

T1569

Service Execution

T1569.002

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

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

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

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

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
13.8MB

MD5
24a7eb50a9ba2bf926a360fae0aee9e8

SHA1
60f12911b891e7e376c7d78353d488fa0c1f2e5e

SHA256
8f17ac93ce19d35d79b03d7fd64ac7ebc97af7042ee2d8c77c7f6e12160dcbb4

SHA512
38342e7eb18f159f916d9a34986e10a084a38c4bf10e31f251ddcc4daca09d8cbfcb33e4357c9dd82fce35b09b49f2815403c62cfc0473d153b1877b166d9da2

Download Submit
memory/1032-15-0x0000000000400000-0x0000000002F05000-memory.dmp

Filesize
43.0MB

Download
memory/1488-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1488-13-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/1488-10-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/1488-16-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/1488-17-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2836-2-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2836-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2836-8-0x0000000000230000-0x0000000000243000-memory.dmp

Filesize
76KB

Download
memory/2836-7-0x0000000000220000-0x000000000022D000-memory.dmp

Filesize
52KB

Download
memory/2836-6-0x0000000000400000-0x0000000002F05000-memory.dmp

Filesize
43.0MB

Download
memory/2836-0-0x0000000000220000-0x000000000022D000-memory.dmp

Filesize
52KB

Download
memory/2836-1-0x0000000000230000-0x0000000000243000-memory.dmp

Filesize
76KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads