tofsee | ac3366999fcb9a093c9aa8694c6c9c915c3539478efd08655893d26b1d61a86e

General

Target

ac3366999fcb9a093c9aa8694c6c9c915c3539478efd08655893d26b1d61a86e.exe
Size

291KB
MD5

1a6ce36ee783de5148f2c0817ac6dabe
SHA1

fa957807a9fe6a0de8f959b3c67a3365eac569a7
SHA256

ac3366999fcb9a093c9aa8694c6c9c915c3539478efd08655893d26b1d61a86e
SHA512

6fd759a69ce43798a3b43efe578f36923f1e67a8f8969d6f593fd29d442c76d72632a6b8679b679deb6e3f62aa0577eeb13e3938182918adbf247ce2c2822305
SSDEEP

6144:HbDiEbQtM055szCZb55JgXrSXuZet0yob7PANco+hOgw:UM450a55G7SXuZet0yob7Ro+Fw

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

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
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
5024	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\zoruhzyv\ImagePath = "C:\\Windows\\SysWOW64\\zoruhzyv\\fgeorkpa.exe"	svchost.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	ac3366999fcb9a093c9aa8694c6c9c915c3539478efd08655893d26b1d61a86e.exe

Deletes itself 1 IoCs

pid	Process
4596	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1872	fgeorkpa.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1872 set thread context of 4596	1872	fgeorkpa.exe	102

Launches sc.exe 3 IoCs

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

pid	Process
2520	sc.exe
2388	sc.exe
3544	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

Program crash 2 IoCs

pid	pid_target	Process	procid_target
2312	3824	WerFault.exe	81
1848	1872	WerFault.exe	96

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	fgeorkpa.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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ac3366999fcb9a093c9aa8694c6c9c915c3539478efd08655893d26b1d61a86e.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3824 wrote to memory of 2504	3824	ac3366999fcb9a093c9aa8694c6c9c915c3539478efd08655893d26b1d61a86e.exe	82
PID 3824 wrote to memory of 2504	3824	ac3366999fcb9a093c9aa8694c6c9c915c3539478efd08655893d26b1d61a86e.exe	82
PID 3824 wrote to memory of 2504	3824	ac3366999fcb9a093c9aa8694c6c9c915c3539478efd08655893d26b1d61a86e.exe	82
PID 3824 wrote to memory of 4476	3824	ac3366999fcb9a093c9aa8694c6c9c915c3539478efd08655893d26b1d61a86e.exe	86
PID 3824 wrote to memory of 4476	3824	ac3366999fcb9a093c9aa8694c6c9c915c3539478efd08655893d26b1d61a86e.exe	86
PID 3824 wrote to memory of 4476	3824	ac3366999fcb9a093c9aa8694c6c9c915c3539478efd08655893d26b1d61a86e.exe	86
PID 3824 wrote to memory of 2520	3824	ac3366999fcb9a093c9aa8694c6c9c915c3539478efd08655893d26b1d61a86e.exe	89
PID 3824 wrote to memory of 2520	3824	ac3366999fcb9a093c9aa8694c6c9c915c3539478efd08655893d26b1d61a86e.exe	89
PID 3824 wrote to memory of 2520	3824	ac3366999fcb9a093c9aa8694c6c9c915c3539478efd08655893d26b1d61a86e.exe	89
PID 3824 wrote to memory of 2388	3824	ac3366999fcb9a093c9aa8694c6c9c915c3539478efd08655893d26b1d61a86e.exe	92
PID 3824 wrote to memory of 2388	3824	ac3366999fcb9a093c9aa8694c6c9c915c3539478efd08655893d26b1d61a86e.exe	92
PID 3824 wrote to memory of 2388	3824	ac3366999fcb9a093c9aa8694c6c9c915c3539478efd08655893d26b1d61a86e.exe	92
PID 3824 wrote to memory of 3544	3824	ac3366999fcb9a093c9aa8694c6c9c915c3539478efd08655893d26b1d61a86e.exe	94
PID 3824 wrote to memory of 3544	3824	ac3366999fcb9a093c9aa8694c6c9c915c3539478efd08655893d26b1d61a86e.exe	94
PID 3824 wrote to memory of 3544	3824	ac3366999fcb9a093c9aa8694c6c9c915c3539478efd08655893d26b1d61a86e.exe	94
PID 3824 wrote to memory of 5024	3824	ac3366999fcb9a093c9aa8694c6c9c915c3539478efd08655893d26b1d61a86e.exe	97
PID 3824 wrote to memory of 5024	3824	ac3366999fcb9a093c9aa8694c6c9c915c3539478efd08655893d26b1d61a86e.exe	97
PID 3824 wrote to memory of 5024	3824	ac3366999fcb9a093c9aa8694c6c9c915c3539478efd08655893d26b1d61a86e.exe	97
PID 1872 wrote to memory of 4596	1872	fgeorkpa.exe	102
PID 1872 wrote to memory of 4596	1872	fgeorkpa.exe	102
PID 1872 wrote to memory of 4596	1872	fgeorkpa.exe	102
PID 1872 wrote to memory of 4596	1872	fgeorkpa.exe	102
PID 1872 wrote to memory of 4596	1872	fgeorkpa.exe	102

C:\Users\Admin\AppData\Local\Temp\ac3366999fcb9a093c9aa8694c6c9c915c3539478efd08655893d26b1d61a86e.exe
"C:\Users\Admin\AppData\Local\Temp\ac3366999fcb9a093c9aa8694c6c9c915c3539478efd08655893d26b1d61a86e.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3824
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\zoruhzyv\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2504
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\fgeorkpa.exe" C:\Windows\SysWOW64\zoruhzyv\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4476
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create zoruhzyv binPath= "C:\Windows\SysWOW64\zoruhzyv\fgeorkpa.exe /d\"C:\Users\Admin\AppData\Local\Temp\ac3366999fcb9a093c9aa8694c6c9c915c3539478efd08655893d26b1d61a86e.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2520
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description zoruhzyv "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2388
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start zoruhzyv
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3544
- 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:5024
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3824 -s 796
  2⤵
  - Program crash
  PID:2312

C:\Windows\SysWOW64\zoruhzyv\fgeorkpa.exe
C:\Windows\SysWOW64\zoruhzyv\fgeorkpa.exe /d"C:\Users\Admin\AppData\Local\Temp\ac3366999fcb9a093c9aa8694c6c9c915c3539478efd08655893d26b1d61a86e.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1872
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:4596
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1872 -s 564
  2⤵
  - Program crash
  PID:1848

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 3824 -ip 3824
1⤵
PID:3528

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 520 -p 1872 -ip 1872
1⤵
PID:1176

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

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
11.9MB

MD5
208ae42b2366b45e9322d44613d32ed5

SHA1
c097827c9be21121ad24cd27bfe6ed4b40842657

SHA256
a3def0d6567f87f0b627aa5e1386f5d44ae56ab2543dbe35a07ba4e5e64f0148

SHA512
8d78f21f6e44a9b896772c9ca421b8a9490d7c70cf4fa8e7de4e505e7c4ba30687cba8f4457294c04173ec63debbfd9e441685274d0b32aed8c1a5e646c057fb

Download Submit
memory/1872-15-0x0000000000400000-0x0000000002B41000-memory.dmp

Filesize
39.3MB

Download
memory/3824-1-0x0000000002D00000-0x0000000002E00000-memory.dmp

Filesize
1024KB

Download
memory/3824-2-0x00000000048C0000-0x00000000048D3000-memory.dmp

Filesize
76KB

Download
memory/3824-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3824-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3824-8-0x00000000048C0000-0x00000000048D3000-memory.dmp

Filesize
76KB

Download
memory/3824-7-0x0000000000400000-0x0000000002B41000-memory.dmp

Filesize
39.3MB

Download
memory/4596-11-0x0000000000AB0000-0x0000000000AC5000-memory.dmp

Filesize
84KB

Download
memory/4596-13-0x0000000000AB0000-0x0000000000AC5000-memory.dmp

Filesize
84KB

Download
memory/4596-14-0x0000000000AB0000-0x0000000000AC5000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads