tofsee | e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85

Analysis

max time kernel
44s
max time network
55s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
03-01-2025 19:03

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General

Target

e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85.exe
Size

14.2MB
MD5

1a7967c2003e283817f70289b300ea43
SHA1

5e68b49e7b17bf6873dd5b76a74f7bd8063d596e
SHA256

e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85
SHA512

725cd0e3073e708c3489710e25aa6c4715ff7933223cb1a03f47f36b8dcb30574fdc7e7bf5bbc9eed4c53cae2688bdfff6acf679ca4a7d9077a14e80df9dd5f1
SSDEEP

3072:S1MBkxvfGaF/FzWb9VT5aLj/JSC5kJwSFjhvoGECaNwxAk8Je8Je8Je8Je8Je8Jl:Jk5FOkjRSC6SS+N+

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation 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
Tofsee family
tofsee
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
2832	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\wocfkpaj\ImagePath = "C:\\Windows\\SysWOW64\\wocfkpaj\\vcbowwei.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2976	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2772	vcbowwei.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2772 set thread context of 2976	2772	vcbowwei.exe	43

Launches sc.exe 3 IoCs

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

pid	Process
2724	sc.exe
2540	sc.exe
2132	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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vcbowwei.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2420 wrote to memory of 3028	2420	e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85.exe	30
PID 2420 wrote to memory of 3028	2420	e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85.exe	30
PID 2420 wrote to memory of 3028	2420	e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85.exe	30
PID 2420 wrote to memory of 3028	2420	e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85.exe	30
PID 2420 wrote to memory of 1752	2420	e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85.exe	32
PID 2420 wrote to memory of 1752	2420	e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85.exe	32
PID 2420 wrote to memory of 1752	2420	e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85.exe	32
PID 2420 wrote to memory of 1752	2420	e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85.exe	32
PID 2420 wrote to memory of 2540	2420	e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85.exe	34
PID 2420 wrote to memory of 2540	2420	e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85.exe	34
PID 2420 wrote to memory of 2540	2420	e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85.exe	34
PID 2420 wrote to memory of 2540	2420	e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85.exe	34
PID 2420 wrote to memory of 2132	2420	e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85.exe	36
PID 2420 wrote to memory of 2132	2420	e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85.exe	36
PID 2420 wrote to memory of 2132	2420	e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85.exe	36
PID 2420 wrote to memory of 2132	2420	e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85.exe	36
PID 2420 wrote to memory of 2724	2420	e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85.exe	38
PID 2420 wrote to memory of 2724	2420	e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85.exe	38
PID 2420 wrote to memory of 2724	2420	e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85.exe	38
PID 2420 wrote to memory of 2724	2420	e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85.exe	38
PID 2420 wrote to memory of 2832	2420	e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85.exe	41
PID 2420 wrote to memory of 2832	2420	e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85.exe	41
PID 2420 wrote to memory of 2832	2420	e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85.exe	41
PID 2420 wrote to memory of 2832	2420	e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85.exe	41
PID 2772 wrote to memory of 2976	2772	vcbowwei.exe	43
PID 2772 wrote to memory of 2976	2772	vcbowwei.exe	43
PID 2772 wrote to memory of 2976	2772	vcbowwei.exe	43
PID 2772 wrote to memory of 2976	2772	vcbowwei.exe	43
PID 2772 wrote to memory of 2976	2772	vcbowwei.exe	43
PID 2772 wrote to memory of 2976	2772	vcbowwei.exe	43

C:\Users\Admin\AppData\Local\Temp\e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85.exe
"C:\Users\Admin\AppData\Local\Temp\e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2420
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\wocfkpaj\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3028
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vcbowwei.exe" C:\Windows\SysWOW64\wocfkpaj\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1752
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create wocfkpaj binPath= "C:\Windows\SysWOW64\wocfkpaj\vcbowwei.exe /d\"C:\Users\Admin\AppData\Local\Temp\e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2540
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description wocfkpaj "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2132
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start wocfkpaj
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2724
- 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:2832

C:\Windows\SysWOW64\wocfkpaj\vcbowwei.exe
C:\Windows\SysWOW64\wocfkpaj\vcbowwei.exe /d"C:\Users\Admin\AppData\Local\Temp\e7cbfa5aae79143963b287f82b5897bf0131161937fbf040fa5785692afd4d85.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2772
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2976

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

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\vcbowwei.exe

Filesize
13.9MB

MD5
903296ef1667d9b6834c9894469c5576

SHA1
f601c333ac5c3c6d8743b1e267737b14dec2db2e

SHA256
1bd8cd45d79625194e83ce0081c67558d67ee14a99264b4d5523d6c8ab173545

SHA512
37780937d5f1b9d8a17616056990539e8ef6aafec8da637ecd1fe23f12c967245ec9b04d4f37ee28832e6abaa32f7790257002cfce0f714350e0a35081053343

Download Submit
memory/2420-1-0x0000000002CC0000-0x0000000002DC0000-memory.dmp

Filesize
1024KB

Download
memory/2420-2-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2420-4-0x0000000000400000-0x0000000002B4B000-memory.dmp

Filesize
39.3MB

Download
memory/2420-8-0x0000000000400000-0x0000000002B4B000-memory.dmp

Filesize
39.3MB

Download
memory/2420-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2772-15-0x0000000000400000-0x0000000002B4B000-memory.dmp

Filesize
39.3MB

Download
memory/2976-14-0x0000000000110000-0x0000000000125000-memory.dmp

Filesize
84KB

Download
memory/2976-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2976-11-0x0000000000110000-0x0000000000125000-memory.dmp

Filesize
84KB

Download
memory/2976-17-0x0000000000110000-0x0000000000125000-memory.dmp

Filesize
84KB

Download
memory/2976-18-0x0000000000110000-0x0000000000125000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads