tofsee | c50e7c2d2c00a1af395a135c572cd87831018afc3d8b9e1cb4ef52b830ebacf1

General

Target

c50e7c2d2c00a1af395a135c572cd87831018afc3d8b9e1cb4ef52b830ebacf1.exe
Size

296KB
MD5

67a2a9995cd99df72c5081dbfa1c1ce5
SHA1

83038eaceb154fe11abd360df3278bbb15a9d581
SHA256

c50e7c2d2c00a1af395a135c572cd87831018afc3d8b9e1cb4ef52b830ebacf1
SHA512

bb2794429057896e92be9dea9fd1ed51e21e873c96bb3402dd229cfb9181b05d71ff519790ac3c0316bfec8402eb3f5738e0bfab00c7ddb1af92c0d1d74d8de8
SSDEEP

6144:kC35+ynOr72R6HfyNX26SXuZet0yy87oG+FPxuISKt0:kCp+YOr7z/yNG6SXuZet0yy87WPxuIf

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
932	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\hrcfriva\ImagePath = "C:\\Windows\\SysWOW64\\hrcfriva\\rbgtavuj.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-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	c50e7c2d2c00a1af395a135c572cd87831018afc3d8b9e1cb4ef52b830ebacf1.exe

Deletes itself 1 IoCs

pid	Process
116	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
920	rbgtavuj.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 920 set thread context of 116	920	rbgtavuj.exe	98

Launches sc.exe 3 IoCs

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

pid	Process
3992	sc.exe
3904	sc.exe
3508	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
1444	5008	WerFault.exe	81
2744	920	WerFault.exe	92

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	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rbgtavuj.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	c50e7c2d2c00a1af395a135c572cd87831018afc3d8b9e1cb4ef52b830ebacf1.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	sc.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 5008 wrote to memory of 1976	5008	c50e7c2d2c00a1af395a135c572cd87831018afc3d8b9e1cb4ef52b830ebacf1.exe	82
PID 5008 wrote to memory of 1976	5008	c50e7c2d2c00a1af395a135c572cd87831018afc3d8b9e1cb4ef52b830ebacf1.exe	82
PID 5008 wrote to memory of 1976	5008	c50e7c2d2c00a1af395a135c572cd87831018afc3d8b9e1cb4ef52b830ebacf1.exe	82
PID 5008 wrote to memory of 440	5008	c50e7c2d2c00a1af395a135c572cd87831018afc3d8b9e1cb4ef52b830ebacf1.exe	84
PID 5008 wrote to memory of 440	5008	c50e7c2d2c00a1af395a135c572cd87831018afc3d8b9e1cb4ef52b830ebacf1.exe	84
PID 5008 wrote to memory of 440	5008	c50e7c2d2c00a1af395a135c572cd87831018afc3d8b9e1cb4ef52b830ebacf1.exe	84
PID 5008 wrote to memory of 3992	5008	c50e7c2d2c00a1af395a135c572cd87831018afc3d8b9e1cb4ef52b830ebacf1.exe	86
PID 5008 wrote to memory of 3992	5008	c50e7c2d2c00a1af395a135c572cd87831018afc3d8b9e1cb4ef52b830ebacf1.exe	86
PID 5008 wrote to memory of 3992	5008	c50e7c2d2c00a1af395a135c572cd87831018afc3d8b9e1cb4ef52b830ebacf1.exe	86
PID 5008 wrote to memory of 3904	5008	c50e7c2d2c00a1af395a135c572cd87831018afc3d8b9e1cb4ef52b830ebacf1.exe	88
PID 5008 wrote to memory of 3904	5008	c50e7c2d2c00a1af395a135c572cd87831018afc3d8b9e1cb4ef52b830ebacf1.exe	88
PID 5008 wrote to memory of 3904	5008	c50e7c2d2c00a1af395a135c572cd87831018afc3d8b9e1cb4ef52b830ebacf1.exe	88
PID 5008 wrote to memory of 3508	5008	c50e7c2d2c00a1af395a135c572cd87831018afc3d8b9e1cb4ef52b830ebacf1.exe	90
PID 5008 wrote to memory of 3508	5008	c50e7c2d2c00a1af395a135c572cd87831018afc3d8b9e1cb4ef52b830ebacf1.exe	90
PID 5008 wrote to memory of 3508	5008	c50e7c2d2c00a1af395a135c572cd87831018afc3d8b9e1cb4ef52b830ebacf1.exe	90
PID 5008 wrote to memory of 932	5008	c50e7c2d2c00a1af395a135c572cd87831018afc3d8b9e1cb4ef52b830ebacf1.exe	93
PID 5008 wrote to memory of 932	5008	c50e7c2d2c00a1af395a135c572cd87831018afc3d8b9e1cb4ef52b830ebacf1.exe	93
PID 5008 wrote to memory of 932	5008	c50e7c2d2c00a1af395a135c572cd87831018afc3d8b9e1cb4ef52b830ebacf1.exe	93
PID 920 wrote to memory of 116	920	rbgtavuj.exe	98
PID 920 wrote to memory of 116	920	rbgtavuj.exe	98
PID 920 wrote to memory of 116	920	rbgtavuj.exe	98
PID 920 wrote to memory of 116	920	rbgtavuj.exe	98
PID 920 wrote to memory of 116	920	rbgtavuj.exe	98

C:\Users\Admin\AppData\Local\Temp\c50e7c2d2c00a1af395a135c572cd87831018afc3d8b9e1cb4ef52b830ebacf1.exe
"C:\Users\Admin\AppData\Local\Temp\c50e7c2d2c00a1af395a135c572cd87831018afc3d8b9e1cb4ef52b830ebacf1.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5008
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\hrcfriva\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1976
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\rbgtavuj.exe" C:\Windows\SysWOW64\hrcfriva\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:440
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create hrcfriva binPath= "C:\Windows\SysWOW64\hrcfriva\rbgtavuj.exe /d\"C:\Users\Admin\AppData\Local\Temp\c50e7c2d2c00a1af395a135c572cd87831018afc3d8b9e1cb4ef52b830ebacf1.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3992
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description hrcfriva "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3904
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start hrcfriva
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3508
- 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:932
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5008 -s 780
  2⤵
  - Program crash
  PID:1444

C:\Windows\SysWOW64\hrcfriva\rbgtavuj.exe
C:\Windows\SysWOW64\hrcfriva\rbgtavuj.exe /d"C:\Users\Admin\AppData\Local\Temp\c50e7c2d2c00a1af395a135c572cd87831018afc3d8b9e1cb4ef52b830ebacf1.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:920
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:116
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 920 -s 528
  2⤵
  - Program crash
  PID:2744

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 5008 -ip 5008
1⤵
PID:3284

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 920 -ip 920
1⤵
PID:1648

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\rbgtavuj.exe

Filesize
10.2MB

MD5
4749d35730f2758065a74a842ea29259

SHA1
3dc35faebf18e030ccd75d70ad6646b1a627ed8f

SHA256
e14db0eef38bf9514d3024b4eef095ae8347a5aa357cc6c2f1aa11ffbafcabad

SHA512
1262c9c1d8982d06a3eb6e433e77363662f4723377c501f767c365328990842c92a99d3b74a7b3e77a7479165a9efc80fa8ecb8aa9f6a3814b269447304b26dd

Download Submit
memory/116-11-0x00000000008C0000-0x00000000008D5000-memory.dmp

Filesize
84KB

Download
memory/116-13-0x00000000008C0000-0x00000000008D5000-memory.dmp

Filesize
84KB

Download
memory/116-14-0x00000000008C0000-0x00000000008D5000-memory.dmp

Filesize
84KB

Download
memory/920-15-0x0000000000400000-0x0000000001C00000-memory.dmp

Filesize
24.0MB

Download
memory/5008-1-0x0000000001E20000-0x0000000001F20000-memory.dmp

Filesize
1024KB

Download
memory/5008-2-0x0000000001DA0000-0x0000000001DB3000-memory.dmp

Filesize
76KB

Download
memory/5008-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/5008-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/5008-8-0x0000000001DA0000-0x0000000001DB3000-memory.dmp

Filesize
76KB

Download
memory/5008-7-0x0000000000400000-0x0000000001C00000-memory.dmp

Filesize
24.0MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads