tofsee | af96fba4513a6d11f13b862c0dce4e732396ad9459ae0e9c1169d10a64ee3dec

General

Target

3af14f6a815a984317ed01bfe46fd4df0070bce770aaa54bc55cc626831112a5.exe
Size

12.1MB
MD5

702446058f451ba7dc24f6c803c2cde0
SHA1

bf3a9ba6eba9b010f73b40e14af10665468726a0
SHA256

3af14f6a815a984317ed01bfe46fd4df0070bce770aaa54bc55cc626831112a5
SHA512

d66c491708c746ed590d7394dd33b466bfec6e65268426af6996042335e9f256d6029f26434312bf401997d7bbba22688540d1a6066536c80894ce89b5d7ae43
SSDEEP

3072:iaph+Lu/fY1fiDxf3AC0Rio+jbtocBO4Ie54I3swQ3swQ3swQ3swQ3swQ3swQ3s8:iG+Lu/fMaDNYizjbQ

Score

10^/10

tofsee evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan 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

Processes:

netsh.exe

pid process

2784 netsh.exe

pid	process
2784	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\hllxuvgb\ImagePath = "C:\\Windows\\SysWOW64\\hllxuvgb\\eqgthgyc.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

2884 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

eqgthgyc.exe

pid process

2772 eqgthgyc.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

eqgthgyc.exe

description pid process target process

PID 2772 set thread context of 2884 2772 eqgthgyc.exe svchost.exe
Launches sc.exe 3 IoCs
Sc.exe is a Windows utlilty to control services on the system.

Processes:

sc.exesc.exesc.exe

pid process

2732 sc.exe
2676 sc.exe
2300 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
2884	svchost.exe

pid	process
2772	eqgthgyc.exe

description	pid	process	target process
PID 2772 set thread context of 2884	2772	eqgthgyc.exe	svchost.exe

pid	process
2732	sc.exe
2676	sc.exe
2300	sc.exe

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

Processes:

netsh.exe

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

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

3af14f6a815a984317ed01bfe46fd4df0070bce770aaa54bc55cc626831112a5.exeeqgthgyc.exe

description	pid	process	target process
PID 3016 wrote to memory of 2204	3016	3af14f6a815a984317ed01bfe46fd4df0070bce770aaa54bc55cc626831112a5.exe	cmd.exe
PID 3016 wrote to memory of 2204	3016	3af14f6a815a984317ed01bfe46fd4df0070bce770aaa54bc55cc626831112a5.exe	cmd.exe
PID 3016 wrote to memory of 2204	3016	3af14f6a815a984317ed01bfe46fd4df0070bce770aaa54bc55cc626831112a5.exe	cmd.exe
PID 3016 wrote to memory of 2204	3016	3af14f6a815a984317ed01bfe46fd4df0070bce770aaa54bc55cc626831112a5.exe	cmd.exe
PID 3016 wrote to memory of 1320	3016	3af14f6a815a984317ed01bfe46fd4df0070bce770aaa54bc55cc626831112a5.exe	cmd.exe
PID 3016 wrote to memory of 1320	3016	3af14f6a815a984317ed01bfe46fd4df0070bce770aaa54bc55cc626831112a5.exe	cmd.exe
PID 3016 wrote to memory of 1320	3016	3af14f6a815a984317ed01bfe46fd4df0070bce770aaa54bc55cc626831112a5.exe	cmd.exe
PID 3016 wrote to memory of 1320	3016	3af14f6a815a984317ed01bfe46fd4df0070bce770aaa54bc55cc626831112a5.exe	cmd.exe
PID 3016 wrote to memory of 2732	3016	3af14f6a815a984317ed01bfe46fd4df0070bce770aaa54bc55cc626831112a5.exe	sc.exe
PID 3016 wrote to memory of 2732	3016	3af14f6a815a984317ed01bfe46fd4df0070bce770aaa54bc55cc626831112a5.exe	sc.exe
PID 3016 wrote to memory of 2732	3016	3af14f6a815a984317ed01bfe46fd4df0070bce770aaa54bc55cc626831112a5.exe	sc.exe
PID 3016 wrote to memory of 2732	3016	3af14f6a815a984317ed01bfe46fd4df0070bce770aaa54bc55cc626831112a5.exe	sc.exe
PID 3016 wrote to memory of 2676	3016	3af14f6a815a984317ed01bfe46fd4df0070bce770aaa54bc55cc626831112a5.exe	sc.exe
PID 3016 wrote to memory of 2676	3016	3af14f6a815a984317ed01bfe46fd4df0070bce770aaa54bc55cc626831112a5.exe	sc.exe
PID 3016 wrote to memory of 2676	3016	3af14f6a815a984317ed01bfe46fd4df0070bce770aaa54bc55cc626831112a5.exe	sc.exe
PID 3016 wrote to memory of 2676	3016	3af14f6a815a984317ed01bfe46fd4df0070bce770aaa54bc55cc626831112a5.exe	sc.exe
PID 3016 wrote to memory of 2300	3016	3af14f6a815a984317ed01bfe46fd4df0070bce770aaa54bc55cc626831112a5.exe	sc.exe
PID 3016 wrote to memory of 2300	3016	3af14f6a815a984317ed01bfe46fd4df0070bce770aaa54bc55cc626831112a5.exe	sc.exe
PID 3016 wrote to memory of 2300	3016	3af14f6a815a984317ed01bfe46fd4df0070bce770aaa54bc55cc626831112a5.exe	sc.exe
PID 3016 wrote to memory of 2300	3016	3af14f6a815a984317ed01bfe46fd4df0070bce770aaa54bc55cc626831112a5.exe	sc.exe
PID 2772 wrote to memory of 2884	2772	eqgthgyc.exe	svchost.exe
PID 2772 wrote to memory of 2884	2772	eqgthgyc.exe	svchost.exe
PID 2772 wrote to memory of 2884	2772	eqgthgyc.exe	svchost.exe
PID 2772 wrote to memory of 2884	2772	eqgthgyc.exe	svchost.exe
PID 2772 wrote to memory of 2884	2772	eqgthgyc.exe	svchost.exe
PID 2772 wrote to memory of 2884	2772	eqgthgyc.exe	svchost.exe
PID 3016 wrote to memory of 2784	3016	3af14f6a815a984317ed01bfe46fd4df0070bce770aaa54bc55cc626831112a5.exe	netsh.exe
PID 3016 wrote to memory of 2784	3016	3af14f6a815a984317ed01bfe46fd4df0070bce770aaa54bc55cc626831112a5.exe	netsh.exe
PID 3016 wrote to memory of 2784	3016	3af14f6a815a984317ed01bfe46fd4df0070bce770aaa54bc55cc626831112a5.exe	netsh.exe
PID 3016 wrote to memory of 2784	3016	3af14f6a815a984317ed01bfe46fd4df0070bce770aaa54bc55cc626831112a5.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\3af14f6a815a984317ed01bfe46fd4df0070bce770aaa54bc55cc626831112a5.exe
"C:\Users\Admin\AppData\Local\Temp\3af14f6a815a984317ed01bfe46fd4df0070bce770aaa54bc55cc626831112a5.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3016

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\hllxuvgb\
2⤵
PID:2204

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\eqgthgyc.exe" C:\Windows\SysWOW64\hllxuvgb\
2⤵
PID:1320

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create hllxuvgb binPath= "C:\Windows\SysWOW64\hllxuvgb\eqgthgyc.exe /d\"C:\Users\Admin\AppData\Local\Temp\3af14f6a815a984317ed01bfe46fd4df0070bce770aaa54bc55cc626831112a5.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:2732

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description hllxuvgb "wifi internet conection"
2⤵
- Launches sc.exe
PID:2676

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start hllxuvgb
2⤵
- Launches sc.exe
PID:2300

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
PID:2784

C:\Windows\SysWOW64\hllxuvgb\eqgthgyc.exe
C:\Windows\SysWOW64\hllxuvgb\eqgthgyc.exe /d"C:\Users\Admin\AppData\Local\Temp\3af14f6a815a984317ed01bfe46fd4df0070bce770aaa54bc55cc626831112a5.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2772

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
- Deletes itself
PID:2884

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

1

T1569

Service Execution

1

T1569.002

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Defense Evasion

Impair Defenses

1

T1562

Disable or Modify System Firewall

Modify Registry

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
14.2MB

MD5
bb7afd4e5cd3a6b179fae354faa2a6a2

SHA1
3a498297cec319dd01fffecffd2b4a92c1a7ee68

SHA256
76abad0003400b9253bed397fd4ba0931f2d3062cd1ab69be1718cd8427501c5

SHA512
4575f34bacca5c3b6d50b3f8b1af90ef1060c4135e60c5ca2870006b3ce358e49181668650f4d7781ad7348792bc4f8e2ef15ae40739f458606602d6702fbc56

Download Submit
memory/2772-13-0x0000000000400000-0x0000000001BB5000-memory.dmp

Filesize
23.7MB

Download
memory/2884-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2884-8-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2884-11-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2884-17-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2884-18-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/3016-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3016-1-0x0000000001D90000-0x0000000001E90000-memory.dmp

Filesize
1024KB

Download
memory/3016-2-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/3016-16-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3016-15-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/3016-14-0x0000000000400000-0x0000000001BB5000-memory.dmp

Filesize
23.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads