tofsee | b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225

General

Target

b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225.exe
Size

219KB
MD5

2ffd7895fec9b13e5926be2b55d035b9
SHA1

dc3182698e5878513677dca541016c32e74f37a8
SHA256

b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225
SHA512

ee566d87997374a58cc26425d7fa4643380eb17ff02ea880cb1c4e84f0700c0aeaf61ced9f0ac9551ac646367dc73a9686abba4362405593469abce5cefed909
SSDEEP

3072:hrHIQm9TOcx4AGPmQ2OvWRNqxDJMIeALuIcY3bCl2OVdRUXqHy5kVw+HM:ZHUMPOyJveAao3afQ2VxHM

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

43.231.4.7

lazystax.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
2376	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\cenpyaxx\ImagePath = "C:\\Windows\\SysWOW64\\cenpyaxx\\qoxyhdso.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-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225.exe

Deletes itself 1 IoCs

pid	Process
3940	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
5020	qoxyhdso.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 5020 set thread context of 3940	5020	qoxyhdso.exe	101

Launches sc.exe 3 IoCs

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

pid	Process
976	sc.exe
368	sc.exe
2156	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 value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1728	2404	WerFault.exe	82

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	qoxyhdso.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225.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

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2404 wrote to memory of 1004	2404	b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225.exe	83
PID 2404 wrote to memory of 1004	2404	b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225.exe	83
PID 2404 wrote to memory of 1004	2404	b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225.exe	83
PID 2404 wrote to memory of 3044	2404	b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225.exe	85
PID 2404 wrote to memory of 3044	2404	b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225.exe	85
PID 2404 wrote to memory of 3044	2404	b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225.exe	85
PID 2404 wrote to memory of 368	2404	b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225.exe	87
PID 2404 wrote to memory of 368	2404	b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225.exe	87
PID 2404 wrote to memory of 368	2404	b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225.exe	87
PID 2404 wrote to memory of 2156	2404	b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225.exe	90
PID 2404 wrote to memory of 2156	2404	b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225.exe	90
PID 2404 wrote to memory of 2156	2404	b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225.exe	90
PID 2404 wrote to memory of 976	2404	b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225.exe	92
PID 2404 wrote to memory of 976	2404	b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225.exe	92
PID 2404 wrote to memory of 976	2404	b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225.exe	92
PID 2404 wrote to memory of 2376	2404	b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225.exe	95
PID 2404 wrote to memory of 2376	2404	b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225.exe	95
PID 2404 wrote to memory of 2376	2404	b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225.exe	95
PID 5020 wrote to memory of 3940	5020	qoxyhdso.exe	101
PID 5020 wrote to memory of 3940	5020	qoxyhdso.exe	101
PID 5020 wrote to memory of 3940	5020	qoxyhdso.exe	101
PID 5020 wrote to memory of 3940	5020	qoxyhdso.exe	101
PID 5020 wrote to memory of 3940	5020	qoxyhdso.exe	101

C:\Users\Admin\AppData\Local\Temp\b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225.exe
"C:\Users\Admin\AppData\Local\Temp\b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2404
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\cenpyaxx\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1004
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\qoxyhdso.exe" C:\Windows\SysWOW64\cenpyaxx\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3044
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create cenpyaxx binPath= "C:\Windows\SysWOW64\cenpyaxx\qoxyhdso.exe /d\"C:\Users\Admin\AppData\Local\Temp\b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:368
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description cenpyaxx "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2156
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start cenpyaxx
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:976
- 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:2376
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2404 -s 1220
  2⤵
  - Program crash
  PID:1728

C:\Windows\SysWOW64\cenpyaxx\qoxyhdso.exe
C:\Windows\SysWOW64\cenpyaxx\qoxyhdso.exe /d"C:\Users\Admin\AppData\Local\Temp\b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5020
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:3940

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 2404 -ip 2404
1⤵
PID:3488

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\qoxyhdso.exe

Filesize
10.6MB

MD5
b5898cc3e36778bca413e868eb369abe

SHA1
50b9deb1b89d037e3df16bc8ebea82a202eb4ff7

SHA256
54e5a67667c253fa3ef0f42d88a2fe28c2e8e5a747990a44a15aa52d34bb9d27

SHA512
af08b324c51d43f323d4bbb3d7e2326a5862f440cf00d2a6614a8070974a7b490fa910cf3f152e38de26c737cd5d2b7ae0ba4879f891a77212f5ff7fbdd7a75a

Download Submit
memory/2404-1-0x0000000002DC0000-0x0000000002EC0000-memory.dmp

Filesize
1024KB

Download
memory/2404-2-0x0000000002D50000-0x0000000002D63000-memory.dmp

Filesize
76KB

Download
memory/2404-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2404-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2404-8-0x0000000002D50000-0x0000000002D63000-memory.dmp

Filesize
76KB

Download
memory/2404-7-0x0000000000400000-0x0000000002BAD000-memory.dmp

Filesize
39.7MB

Download
memory/3940-11-0x00000000008E0000-0x00000000008F5000-memory.dmp

Filesize
84KB

Download
memory/3940-14-0x00000000008E0000-0x00000000008F5000-memory.dmp

Filesize
84KB

Download
memory/3940-15-0x00000000008E0000-0x00000000008F5000-memory.dmp

Filesize
84KB

Download
memory/5020-13-0x0000000000400000-0x0000000002BAD000-memory.dmp

Filesize
39.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads