tofsee | bf287ab183c3ca2038a1a683c75aa0942a0dfdd760e184b25d506d7d48614d7a

General

Target

bf287ab183c3ca2038a1a683c75aa0942a0dfdd760e184b25d506d7d48614d7a.exe
Size

11.9MB
MD5

94ddf26483c2d2314510988223e8a8f3
SHA1

e1307d39c80be583ff7fbefd99bbc6c6f41ef44a
SHA256

bf287ab183c3ca2038a1a683c75aa0942a0dfdd760e184b25d506d7d48614d7a
SHA512

3167dee1764a4840b70fa30d51fdc4283cfe5c7c1a84c5560e2b0e59f2b349791b681369e9047733a51a76cd2e1a28a01c540e2c71ea54279b2f6bb9950473c7
SSDEEP

49152:tkHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHV:K

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

Processes:

netsh.exe

pid	Process
1588	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\wengndno\ImagePath = "C:\\Windows\\SysWOW64\\wengndno\\lepfqngz.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

Processes:

bf287ab183c3ca2038a1a683c75aa0942a0dfdd760e184b25d506d7d48614d7a.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	bf287ab183c3ca2038a1a683c75aa0942a0dfdd760e184b25d506d7d48614d7a.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid	Process
2508	svchost.exe

Executes dropped EXE 1 IoCs

Processes:

lepfqngz.exe

pid	Process
956	lepfqngz.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

lepfqngz.exe

description	pid	Process	procid_target
PID 956 set thread context of 2508	956	lepfqngz.exe	105

Launches sc.exe 3 IoCs

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

Processes:

sc.exesc.exesc.exe

pid	Process
2820	sc.exe
704	sc.exe
2332	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

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

Program crash 2 IoCs

Processes:

WerFault.exeWerFault.exe

pid	pid_target	Process	procid_target
3668	628	WerFault.exe	82
3728	956	WerFault.exe	98

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

Processes:

svchost.exebf287ab183c3ca2038a1a683c75aa0942a0dfdd760e184b25d506d7d48614d7a.execmd.execmd.exesc.exenetsh.exelepfqngz.exesc.exesc.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	bf287ab183c3ca2038a1a683c75aa0942a0dfdd760e184b25d506d7d48614d7a.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	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	lepfqngz.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

bf287ab183c3ca2038a1a683c75aa0942a0dfdd760e184b25d506d7d48614d7a.exelepfqngz.exe

description	pid	Process	procid_target
PID 628 wrote to memory of 512	628	bf287ab183c3ca2038a1a683c75aa0942a0dfdd760e184b25d506d7d48614d7a.exe	83
PID 628 wrote to memory of 512	628	bf287ab183c3ca2038a1a683c75aa0942a0dfdd760e184b25d506d7d48614d7a.exe	83
PID 628 wrote to memory of 512	628	bf287ab183c3ca2038a1a683c75aa0942a0dfdd760e184b25d506d7d48614d7a.exe	83
PID 628 wrote to memory of 320	628	bf287ab183c3ca2038a1a683c75aa0942a0dfdd760e184b25d506d7d48614d7a.exe	87
PID 628 wrote to memory of 320	628	bf287ab183c3ca2038a1a683c75aa0942a0dfdd760e184b25d506d7d48614d7a.exe	87
PID 628 wrote to memory of 320	628	bf287ab183c3ca2038a1a683c75aa0942a0dfdd760e184b25d506d7d48614d7a.exe	87
PID 628 wrote to memory of 2820	628	bf287ab183c3ca2038a1a683c75aa0942a0dfdd760e184b25d506d7d48614d7a.exe	89
PID 628 wrote to memory of 2820	628	bf287ab183c3ca2038a1a683c75aa0942a0dfdd760e184b25d506d7d48614d7a.exe	89
PID 628 wrote to memory of 2820	628	bf287ab183c3ca2038a1a683c75aa0942a0dfdd760e184b25d506d7d48614d7a.exe	89
PID 628 wrote to memory of 704	628	bf287ab183c3ca2038a1a683c75aa0942a0dfdd760e184b25d506d7d48614d7a.exe	94
PID 628 wrote to memory of 704	628	bf287ab183c3ca2038a1a683c75aa0942a0dfdd760e184b25d506d7d48614d7a.exe	94
PID 628 wrote to memory of 704	628	bf287ab183c3ca2038a1a683c75aa0942a0dfdd760e184b25d506d7d48614d7a.exe	94
PID 628 wrote to memory of 2332	628	bf287ab183c3ca2038a1a683c75aa0942a0dfdd760e184b25d506d7d48614d7a.exe	96
PID 628 wrote to memory of 2332	628	bf287ab183c3ca2038a1a683c75aa0942a0dfdd760e184b25d506d7d48614d7a.exe	96
PID 628 wrote to memory of 2332	628	bf287ab183c3ca2038a1a683c75aa0942a0dfdd760e184b25d506d7d48614d7a.exe	96
PID 628 wrote to memory of 1588	628	bf287ab183c3ca2038a1a683c75aa0942a0dfdd760e184b25d506d7d48614d7a.exe	99
PID 628 wrote to memory of 1588	628	bf287ab183c3ca2038a1a683c75aa0942a0dfdd760e184b25d506d7d48614d7a.exe	99
PID 628 wrote to memory of 1588	628	bf287ab183c3ca2038a1a683c75aa0942a0dfdd760e184b25d506d7d48614d7a.exe	99
PID 956 wrote to memory of 2508	956	lepfqngz.exe	105
PID 956 wrote to memory of 2508	956	lepfqngz.exe	105
PID 956 wrote to memory of 2508	956	lepfqngz.exe	105
PID 956 wrote to memory of 2508	956	lepfqngz.exe	105
PID 956 wrote to memory of 2508	956	lepfqngz.exe	105

C:\Users\Admin\AppData\Local\Temp\bf287ab183c3ca2038a1a683c75aa0942a0dfdd760e184b25d506d7d48614d7a.exe
"C:\Users\Admin\AppData\Local\Temp\bf287ab183c3ca2038a1a683c75aa0942a0dfdd760e184b25d506d7d48614d7a.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:628
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\wengndno\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:512
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\lepfqngz.exe" C:\Windows\SysWOW64\wengndno\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:320
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create wengndno binPath= "C:\Windows\SysWOW64\wengndno\lepfqngz.exe /d\"C:\Users\Admin\AppData\Local\Temp\bf287ab183c3ca2038a1a683c75aa0942a0dfdd760e184b25d506d7d48614d7a.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2820
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description wengndno "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:704
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start wengndno
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2332
- 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:1588
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 628 -s 796
  2⤵
  - Program crash
  PID:3668

C:\Windows\SysWOW64\wengndno\lepfqngz.exe
C:\Windows\SysWOW64\wengndno\lepfqngz.exe /d"C:\Users\Admin\AppData\Local\Temp\bf287ab183c3ca2038a1a683c75aa0942a0dfdd760e184b25d506d7d48614d7a.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:956
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2508
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 956 -s 516
  2⤵
  - Program crash
  PID:3728

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 628 -ip 628
1⤵
PID:3996

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 956 -ip 956
1⤵
PID:1352

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\lepfqngz.exe

Filesize
14.4MB

MD5
de1ac9c3c9f5cfc87e4cdc626add516d

SHA1
c0db11e76f98e5b6cfe4ddbb9a7a7cfd559ecbf8

SHA256
526d74d4de64a55924f1df95ea7aad32cbdcdf7e6da2a44d969937203ec2b79f

SHA512
c22b9f34eb7cb5a066977fb7d6a8c5fcaa80d22997f15c165cee4de29dbc73f95bc96cb2da565512abff7811f3a9dfee28ddfcf7d95b7e7e10cd1b269a2cfa46

Download Submit
memory/628-1-0x0000000000790000-0x0000000000890000-memory.dmp

Filesize
1024KB

Download
memory/628-2-0x00000000024D0000-0x00000000024E3000-memory.dmp

Filesize
76KB

Download
memory/628-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/628-8-0x0000000000400000-0x0000000000785000-memory.dmp

Filesize
3.5MB

Download
memory/628-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/628-9-0x00000000024D0000-0x00000000024E3000-memory.dmp

Filesize
76KB

Download
memory/956-11-0x0000000000400000-0x0000000000785000-memory.dmp

Filesize
3.5MB

Download
memory/956-17-0x0000000000400000-0x0000000000785000-memory.dmp

Filesize
3.5MB

Download
memory/2508-12-0x00000000003A0000-0x00000000003B5000-memory.dmp

Filesize
84KB

Download
memory/2508-14-0x00000000003A0000-0x00000000003B5000-memory.dmp

Filesize
84KB

Download
memory/2508-15-0x00000000003A0000-0x00000000003B5000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads