tofsee | 2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749

Analysis

max time kernel
144s
max time network
144s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
28/01/2025, 05:53

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General

Target

2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe
Size

14.1MB
MD5

a707de5d5c4e2813b31ab8cfa03e2b09
SHA1

56f59963bde1d6f1ea8f3f1349f1b4855728c1c0
SHA256

2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749
SHA512

2c5eb637d20c92f02621b2e16dd15fa38db91467a1a76cf381ff04ef6bd05a41931dac298cb92b5e7eefb453f6ded8a5d363082cb8ba5e57adffbcdc4bc40860
SSDEEP

3072:aMFPx8ZeNPqKsjN2VqfrHJpx5uXvw9oXU6L3w4WtWtWtWtWtWtWtWtWtWtWtWtWw:a06ZeNi5jNAqjHJpx5OI9oXjL

Score

10^/10

tofsee defense_evasion discovery 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

Windows security bypass 2 TTPs 1 IoCs

defense_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\ozbapzcl = "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

defense_evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
2656	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\ozbapzcl\ImagePath = "C:\\Windows\\SysWOW64\\ozbapzcl\\ugolreki.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2848	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2860	ugolreki.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2860 set thread context of 2848	2860	ugolreki.exe	41

Launches sc.exe 3 IoCs

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

pid	Process
2348	sc.exe
2764	sc.exe
2876	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 queried	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh	netsh.exe
Key opened	\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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ugolreki.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2008 wrote to memory of 2528	2008	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	30
PID 2008 wrote to memory of 2528	2008	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	30
PID 2008 wrote to memory of 2528	2008	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	30
PID 2008 wrote to memory of 2528	2008	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	30
PID 2008 wrote to memory of 1496	2008	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	32
PID 2008 wrote to memory of 1496	2008	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	32
PID 2008 wrote to memory of 1496	2008	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	32
PID 2008 wrote to memory of 1496	2008	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	32
PID 2008 wrote to memory of 2348	2008	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	34
PID 2008 wrote to memory of 2348	2008	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	34
PID 2008 wrote to memory of 2348	2008	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	34
PID 2008 wrote to memory of 2348	2008	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	34
PID 2008 wrote to memory of 2764	2008	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	36
PID 2008 wrote to memory of 2764	2008	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	36
PID 2008 wrote to memory of 2764	2008	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	36
PID 2008 wrote to memory of 2764	2008	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	36
PID 2008 wrote to memory of 2876	2008	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	38
PID 2008 wrote to memory of 2876	2008	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	38
PID 2008 wrote to memory of 2876	2008	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	38
PID 2008 wrote to memory of 2876	2008	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	38
PID 2860 wrote to memory of 2848	2860	ugolreki.exe	41
PID 2860 wrote to memory of 2848	2860	ugolreki.exe	41
PID 2860 wrote to memory of 2848	2860	ugolreki.exe	41
PID 2860 wrote to memory of 2848	2860	ugolreki.exe	41
PID 2860 wrote to memory of 2848	2860	ugolreki.exe	41
PID 2860 wrote to memory of 2848	2860	ugolreki.exe	41
PID 2008 wrote to memory of 2656	2008	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	42
PID 2008 wrote to memory of 2656	2008	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	42
PID 2008 wrote to memory of 2656	2008	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	42
PID 2008 wrote to memory of 2656	2008	2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe	42

C:\Users\Admin\AppData\Local\Temp\2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe
"C:\Users\Admin\AppData\Local\Temp\2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2008
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ozbapzcl\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2528
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ugolreki.exe" C:\Windows\SysWOW64\ozbapzcl\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1496
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create ozbapzcl binPath= "C:\Windows\SysWOW64\ozbapzcl\ugolreki.exe /d\"C:\Users\Admin\AppData\Local\Temp\2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2348
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description ozbapzcl "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2764
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start ozbapzcl
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2876
- 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:2656

C:\Windows\SysWOW64\ozbapzcl\ugolreki.exe
C:\Windows\SysWOW64\ozbapzcl\ugolreki.exe /d"C:\Users\Admin\AppData\Local\Temp\2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2860
- 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:2848

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\ugolreki.exe

Filesize
12.8MB

MD5
dc4f2969a6564ed4a24adb9279837aa0

SHA1
8b696225e36cfae213b79fd1569f8fcccccd7698

SHA256
ffbe0b952347ce7ecc57e476c1df4b57bebb3809ee29577d46819e0e04195150

SHA512
49384be8807dcdc873ee3086dd31694e4c1d3b3109fb58f662a6e2f4860bfe80291c092d6b615a118e9d2c873f660cabfc113bf67e41f8383a33d2e1f2cfe0b1

Download Submit
memory/2008-15-0x0000000000240000-0x0000000000253000-memory.dmp

Filesize
76KB

Download
memory/2008-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2008-2-0x0000000000240000-0x0000000000253000-memory.dmp

Filesize
76KB

Download
memory/2008-16-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2008-1-0x0000000000840000-0x0000000000940000-memory.dmp

Filesize
1024KB

Download
memory/2008-14-0x0000000000400000-0x000000000070E000-memory.dmp

Filesize
3.1MB

Download
memory/2848-11-0x00000000000E0000-0x00000000000F5000-memory.dmp

Filesize
84KB

Download
memory/2848-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2848-8-0x00000000000E0000-0x00000000000F5000-memory.dmp

Filesize
84KB

Download
memory/2848-17-0x00000000000E0000-0x00000000000F5000-memory.dmp

Filesize
84KB

Download
memory/2848-18-0x00000000000E0000-0x00000000000F5000-memory.dmp

Filesize
84KB

Download
memory/2860-13-0x0000000000400000-0x000000000070E000-memory.dmp

Filesize
3.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads