tofsee | eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447

General

Target

eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exe
Size

12.9MB
MD5

27bc92160d3d4e66f593e9f8f3023dff
SHA1

920930e48cc64142bdb9643b6f03152423f22fce
SHA256

eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447
SHA512

68dddd1252274b8d7c029f84128d9f16d2f78f72dc22c548c6f296efbf6893c5b26f04aa1eeda4c1f76f5dfb016fb274618c94dd6650992796a016aa52b989ed
SSDEEP

49152:nyzapZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ0:nCB

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
3612	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\lemuwhsj\ImagePath = "C:\\Windows\\SysWOW64\\lemuwhsj\\sxwukqzo.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	eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exe

Deletes itself 1 IoCs

pid	Process
1888	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3456	sxwukqzo.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3456 set thread context of 1888	3456	sxwukqzo.exe	106

Launches sc.exe 3 IoCs

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

pid	Process
3412	sc.exe
1100	sc.exe
3760	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
1116	2668	WerFault.exe	83
4792	3456	WerFault.exe	100

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	svchost.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	sxwukqzo.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2668 wrote to memory of 216	2668	eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exe	84
PID 2668 wrote to memory of 216	2668	eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exe	84
PID 2668 wrote to memory of 216	2668	eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exe	84
PID 2668 wrote to memory of 1768	2668	eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exe	86
PID 2668 wrote to memory of 1768	2668	eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exe	86
PID 2668 wrote to memory of 1768	2668	eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exe	86
PID 2668 wrote to memory of 3412	2668	eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exe	90
PID 2668 wrote to memory of 3412	2668	eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exe	90
PID 2668 wrote to memory of 3412	2668	eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exe	90
PID 2668 wrote to memory of 1100	2668	eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exe	92
PID 2668 wrote to memory of 1100	2668	eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exe	92
PID 2668 wrote to memory of 1100	2668	eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exe	92
PID 2668 wrote to memory of 3760	2668	eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exe	97
PID 2668 wrote to memory of 3760	2668	eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exe	97
PID 2668 wrote to memory of 3760	2668	eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exe	97
PID 2668 wrote to memory of 3612	2668	eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exe	101
PID 2668 wrote to memory of 3612	2668	eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exe	101
PID 2668 wrote to memory of 3612	2668	eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exe	101
PID 3456 wrote to memory of 1888	3456	sxwukqzo.exe	106
PID 3456 wrote to memory of 1888	3456	sxwukqzo.exe	106
PID 3456 wrote to memory of 1888	3456	sxwukqzo.exe	106
PID 3456 wrote to memory of 1888	3456	sxwukqzo.exe	106
PID 3456 wrote to memory of 1888	3456	sxwukqzo.exe	106

C:\Users\Admin\AppData\Local\Temp\eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exe
"C:\Users\Admin\AppData\Local\Temp\eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2668
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\lemuwhsj\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:216
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\sxwukqzo.exe" C:\Windows\SysWOW64\lemuwhsj\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1768
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create lemuwhsj binPath= "C:\Windows\SysWOW64\lemuwhsj\sxwukqzo.exe /d\"C:\Users\Admin\AppData\Local\Temp\eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3412
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description lemuwhsj "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1100
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start lemuwhsj
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3760
- 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:3612
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2668 -s 684
  2⤵
  - Program crash
  PID:1116

C:\Windows\SysWOW64\lemuwhsj\sxwukqzo.exe
C:\Windows\SysWOW64\lemuwhsj\sxwukqzo.exe /d"C:\Users\Admin\AppData\Local\Temp\eb23f56dfaa83993bbc64dd0bbaabb55d03efc165400d97917c1d0f61e30d447.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3456
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:1888
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3456 -s 524
  2⤵
  - Program crash
  PID:4792

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 2668 -ip 2668
1⤵
PID:3720

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 3456 -ip 3456
1⤵
PID:3724

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\sxwukqzo.exe

Filesize
11.3MB

MD5
5fb2adbe929c36773fefc31620e7fd99

SHA1
db975772166e7af742de6ee8650330688ccf7a12

SHA256
2479040d1336ba00cafbbbc9f77b8b149afaeb98693ec65c5c674951d4b36c52

SHA512
25f360a302ad10ecc7fdcf96e60e204d4fe5c66c812ac1bdb962f7a11dd3fa7aac8a1c164afbcbe7c2dd20d9675a30b95c4f3c0d547ee179f93e019b6ff481f8

Download Submit
memory/1888-13-0x0000000000B70000-0x0000000000B85000-memory.dmp

Filesize
84KB

Download
memory/1888-11-0x0000000000B70000-0x0000000000B85000-memory.dmp

Filesize
84KB

Download
memory/1888-15-0x0000000000B70000-0x0000000000B85000-memory.dmp

Filesize
84KB

Download
memory/2668-1-0x00000000018F0000-0x00000000019F0000-memory.dmp

Filesize
1024KB

Download
memory/2668-2-0x00000000032D0000-0x00000000032E3000-memory.dmp

Filesize
76KB

Download
memory/2668-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2668-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2668-9-0x00000000032D0000-0x00000000032E3000-memory.dmp

Filesize
76KB

Download
memory/2668-8-0x0000000000400000-0x00000000016BD000-memory.dmp

Filesize
18.7MB

Download
memory/3456-14-0x0000000000400000-0x00000000016BD000-memory.dmp

Filesize
18.7MB

Download
memory/3456-17-0x0000000000400000-0x00000000016BD000-memory.dmp

Filesize
18.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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