tofsee | 2b76348a2a85a684600ced4c9ebfe496bfcf46ff451c93d841b1c473fd03a7d2

General

Target

2b76348a2a85a684600ced4c9ebfe496bfcf46ff451c93d841b1c473fd03a7d2.exe
Size

13.2MB
MD5

290911ada19cf5f4241acd5beadb4fa8
SHA1

0ba3021f83536da222ac06c3881e24e8ef5fc485
SHA256

2b76348a2a85a684600ced4c9ebfe496bfcf46ff451c93d841b1c473fd03a7d2
SHA512

41b9faa33bddb614c547dd36b908c05cb14323b88ca26198ed8ea479f7656a89a95b8a38a9b32b24c2be8c6f9fd442f55845c52fb067fe546f7dc86c85cede2c
SSDEEP

49152:MIc6CLNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNX:1c6Cd

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
4056	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\kceseocj\ImagePath = "C:\\Windows\\SysWOW64\\kceseocj\\nzymxhpj.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-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	2b76348a2a85a684600ced4c9ebfe496bfcf46ff451c93d841b1c473fd03a7d2.exe

Deletes itself 1 IoCs

pid	Process
1704	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1504	nzymxhpj.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1504 set thread context of 1704	1504	nzymxhpj.exe	105

Launches sc.exe 3 IoCs

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

pid	Process
3592	sc.exe
3256	sc.exe
4604	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
4476	1476	WerFault.exe	82
4916	1504	WerFault.exe	97

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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2b76348a2a85a684600ced4c9ebfe496bfcf46ff451c93d841b1c473fd03a7d2.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	nzymxhpj.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1476 wrote to memory of 8	1476	2b76348a2a85a684600ced4c9ebfe496bfcf46ff451c93d841b1c473fd03a7d2.exe	83
PID 1476 wrote to memory of 8	1476	2b76348a2a85a684600ced4c9ebfe496bfcf46ff451c93d841b1c473fd03a7d2.exe	83
PID 1476 wrote to memory of 8	1476	2b76348a2a85a684600ced4c9ebfe496bfcf46ff451c93d841b1c473fd03a7d2.exe	83
PID 1476 wrote to memory of 2096	1476	2b76348a2a85a684600ced4c9ebfe496bfcf46ff451c93d841b1c473fd03a7d2.exe	85
PID 1476 wrote to memory of 2096	1476	2b76348a2a85a684600ced4c9ebfe496bfcf46ff451c93d841b1c473fd03a7d2.exe	85
PID 1476 wrote to memory of 2096	1476	2b76348a2a85a684600ced4c9ebfe496bfcf46ff451c93d841b1c473fd03a7d2.exe	85
PID 1476 wrote to memory of 4604	1476	2b76348a2a85a684600ced4c9ebfe496bfcf46ff451c93d841b1c473fd03a7d2.exe	88
PID 1476 wrote to memory of 4604	1476	2b76348a2a85a684600ced4c9ebfe496bfcf46ff451c93d841b1c473fd03a7d2.exe	88
PID 1476 wrote to memory of 4604	1476	2b76348a2a85a684600ced4c9ebfe496bfcf46ff451c93d841b1c473fd03a7d2.exe	88
PID 1476 wrote to memory of 3592	1476	2b76348a2a85a684600ced4c9ebfe496bfcf46ff451c93d841b1c473fd03a7d2.exe	92
PID 1476 wrote to memory of 3592	1476	2b76348a2a85a684600ced4c9ebfe496bfcf46ff451c93d841b1c473fd03a7d2.exe	92
PID 1476 wrote to memory of 3592	1476	2b76348a2a85a684600ced4c9ebfe496bfcf46ff451c93d841b1c473fd03a7d2.exe	92
PID 1476 wrote to memory of 3256	1476	2b76348a2a85a684600ced4c9ebfe496bfcf46ff451c93d841b1c473fd03a7d2.exe	94
PID 1476 wrote to memory of 3256	1476	2b76348a2a85a684600ced4c9ebfe496bfcf46ff451c93d841b1c473fd03a7d2.exe	94
PID 1476 wrote to memory of 3256	1476	2b76348a2a85a684600ced4c9ebfe496bfcf46ff451c93d841b1c473fd03a7d2.exe	94
PID 1476 wrote to memory of 4056	1476	2b76348a2a85a684600ced4c9ebfe496bfcf46ff451c93d841b1c473fd03a7d2.exe	100
PID 1476 wrote to memory of 4056	1476	2b76348a2a85a684600ced4c9ebfe496bfcf46ff451c93d841b1c473fd03a7d2.exe	100
PID 1476 wrote to memory of 4056	1476	2b76348a2a85a684600ced4c9ebfe496bfcf46ff451c93d841b1c473fd03a7d2.exe	100
PID 1504 wrote to memory of 1704	1504	nzymxhpj.exe	105
PID 1504 wrote to memory of 1704	1504	nzymxhpj.exe	105
PID 1504 wrote to memory of 1704	1504	nzymxhpj.exe	105
PID 1504 wrote to memory of 1704	1504	nzymxhpj.exe	105
PID 1504 wrote to memory of 1704	1504	nzymxhpj.exe	105

C:\Users\Admin\AppData\Local\Temp\2b76348a2a85a684600ced4c9ebfe496bfcf46ff451c93d841b1c473fd03a7d2.exe
"C:\Users\Admin\AppData\Local\Temp\2b76348a2a85a684600ced4c9ebfe496bfcf46ff451c93d841b1c473fd03a7d2.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1476
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\kceseocj\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:8
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\nzymxhpj.exe" C:\Windows\SysWOW64\kceseocj\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2096
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create kceseocj binPath= "C:\Windows\SysWOW64\kceseocj\nzymxhpj.exe /d\"C:\Users\Admin\AppData\Local\Temp\2b76348a2a85a684600ced4c9ebfe496bfcf46ff451c93d841b1c473fd03a7d2.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4604
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description kceseocj "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3592
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start kceseocj
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3256
- 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:4056
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1476 -s 788
  2⤵
  - Program crash
  PID:4476

C:\Windows\SysWOW64\kceseocj\nzymxhpj.exe
C:\Windows\SysWOW64\kceseocj\nzymxhpj.exe /d"C:\Users\Admin\AppData\Local\Temp\2b76348a2a85a684600ced4c9ebfe496bfcf46ff451c93d841b1c473fd03a7d2.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1504
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:1704
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1504 -s 536
  2⤵
  - Program crash
  PID:4916

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 1476 -ip 1476
1⤵
PID:1188

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 360 -p 1504 -ip 1504
1⤵
PID:4548

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\nzymxhpj.exe

Filesize
12.1MB

MD5
d4e877ec270100cf5d8f2c87ad5dd625

SHA1
5c45aadc1381d30fdb9b5298a36bb6e362e1ee8d

SHA256
2d6ae1c30279154aa8eceb9cefb4223f19acb7b89f764f48a58d14b561713236

SHA512
b2e8293bac98a376de95473096130788f7e0f715933467d2a605cf2fb41d2fb0c4e95da90b6c705b9031753dfa6eac843eaedd08e011ec1a0a99305bc742404d

Download Submit
memory/1476-1-0x0000000002DB0000-0x0000000002EB0000-memory.dmp

Filesize
1024KB

Download
memory/1476-2-0x0000000003000000-0x0000000003013000-memory.dmp

Filesize
76KB

Download
memory/1476-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1476-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1476-9-0x0000000003000000-0x0000000003013000-memory.dmp

Filesize
76KB

Download
memory/1476-8-0x0000000000400000-0x0000000002BAB000-memory.dmp

Filesize
39.7MB

Download
memory/1504-15-0x0000000000400000-0x0000000002BAB000-memory.dmp

Filesize
39.7MB

Download
memory/1704-11-0x0000000000EF0000-0x0000000000F05000-memory.dmp

Filesize
84KB

Download
memory/1704-13-0x0000000000EF0000-0x0000000000F05000-memory.dmp

Filesize
84KB

Download
memory/1704-14-0x0000000000EF0000-0x0000000000F05000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads