tofsee | 553ce75a13c88ab7422641d393c472170ff4368e79eaa1715ab7611bc3ef508d

Analysis

max time kernel
149s
max time network
136s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
24-12-2024 18:44

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General

Target

02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2.exe
Size

260KB
MD5

ef7e4a69cb1f773ee7b5ac597f06418a
SHA1

7c09ac3d21a7e7866f8a74c6e39f496a75e005ee
SHA256

02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2
SHA512

bec3b85d3bfa56ab5b1427d870f81bbca45a3bb301c524eca29960185832a3664d449e8d4d320926139d3ec97f425b13e6fbd3b62adcf09987ad82c40f80a7a7
SSDEEP

3072:LuJFB8IkKLXHxuvz5q3jzQctU7cw0e7hwiXJl8T4DKFbJOxjw0L9l5M/h3:+FBFTLXx9zQctze7yiX4kMOxjw0xT

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

svartalfheim.top

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

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\nshgzalg = "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
2712	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\nshgzalg\ImagePath = "C:\\Windows\\SysWOW64\\nshgzalg\\ekcrwpg.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2820	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2692	ekcrwpg.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2692 set thread context of 2820	2692	ekcrwpg.exe	44

Launches sc.exe 3 IoCs

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

pid	Process
288	sc.exe
2840	sc.exe
2372	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	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	sc.exe
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	ekcrwpg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2232 wrote to memory of 2172	2232	02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2.exe	31
PID 2232 wrote to memory of 2172	2232	02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2.exe	31
PID 2232 wrote to memory of 2172	2232	02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2.exe	31
PID 2232 wrote to memory of 2172	2232	02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2.exe	31
PID 2232 wrote to memory of 2956	2232	02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2.exe	33
PID 2232 wrote to memory of 2956	2232	02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2.exe	33
PID 2232 wrote to memory of 2956	2232	02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2.exe	33
PID 2232 wrote to memory of 2956	2232	02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2.exe	33
PID 2232 wrote to memory of 288	2232	02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2.exe	35
PID 2232 wrote to memory of 288	2232	02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2.exe	35
PID 2232 wrote to memory of 288	2232	02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2.exe	35
PID 2232 wrote to memory of 288	2232	02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2.exe	35
PID 2232 wrote to memory of 2840	2232	02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2.exe	37
PID 2232 wrote to memory of 2840	2232	02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2.exe	37
PID 2232 wrote to memory of 2840	2232	02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2.exe	37
PID 2232 wrote to memory of 2840	2232	02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2.exe	37
PID 2232 wrote to memory of 2372	2232	02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2.exe	39
PID 2232 wrote to memory of 2372	2232	02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2.exe	39
PID 2232 wrote to memory of 2372	2232	02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2.exe	39
PID 2232 wrote to memory of 2372	2232	02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2.exe	39
PID 2232 wrote to memory of 2712	2232	02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2.exe	42
PID 2232 wrote to memory of 2712	2232	02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2.exe	42
PID 2232 wrote to memory of 2712	2232	02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2.exe	42
PID 2232 wrote to memory of 2712	2232	02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2.exe	42
PID 2692 wrote to memory of 2820	2692	ekcrwpg.exe	44
PID 2692 wrote to memory of 2820	2692	ekcrwpg.exe	44
PID 2692 wrote to memory of 2820	2692	ekcrwpg.exe	44
PID 2692 wrote to memory of 2820	2692	ekcrwpg.exe	44
PID 2692 wrote to memory of 2820	2692	ekcrwpg.exe	44
PID 2692 wrote to memory of 2820	2692	ekcrwpg.exe	44

C:\Users\Admin\AppData\Local\Temp\02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2.exe
"C:\Users\Admin\AppData\Local\Temp\02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2232
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\nshgzalg\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2172
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ekcrwpg.exe" C:\Windows\SysWOW64\nshgzalg\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2956
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create nshgzalg binPath= "C:\Windows\SysWOW64\nshgzalg\ekcrwpg.exe /d\"C:\Users\Admin\AppData\Local\Temp\02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:288
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description nshgzalg "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2840
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start nshgzalg
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2372
- 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:2712

C:\Windows\SysWOW64\nshgzalg\ekcrwpg.exe
C:\Windows\SysWOW64\nshgzalg\ekcrwpg.exe /d"C:\Users\Admin\AppData\Local\Temp\02b4c3dcc4673e8e5b5209e2cbad26584be30b40b082d0bf906ae4d60e9487a2.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2692
- 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:2820

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\ekcrwpg.exe

Filesize
13.3MB

MD5
01d7aa41fef78d252c57a394f8d258cd

SHA1
0c8b7059993df7da51f8e0a00952ec7c89ff5798

SHA256
19db706e74e9417f61844ec797606a4f7fcbd383e66c8808b3f15fe0bcd72096

SHA512
efeb37995dcbf6112ef7342546fe486a68fc3af1dd3000cf3cd793d83cb081c1cf7528f67c6de327439bfe1fb9c24b52ebebc0e5b0749f6623a986fb6191b9b3

Download Submit
memory/2232-8-0x0000000000400000-0x0000000002C2F000-memory.dmp

Filesize
40.2MB

Download
memory/2232-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2232-2-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/2232-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2232-9-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/2232-1-0x0000000002D80000-0x0000000002E80000-memory.dmp

Filesize
1024KB

Download
memory/2692-17-0x0000000000400000-0x0000000002C2F000-memory.dmp

Filesize
40.2MB

Download
memory/2820-11-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2820-14-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2820-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2820-16-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2820-18-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads