tofsee | b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e

General

Target

b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e.exe
Size

10.2MB
MD5

0a5435b0caf94bf65e29727f66456c25
SHA1

76eb55c90ec530ed3969c4fffbf2a64196c90673
SHA256

b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e
SHA512

115278b35b2f5c4e93cc4ddcda82c61a6a2faf5bf58ada753eed8ab3afb110c407cc0dbcc175ecc4b245a9e0ce199df96cc8bb2d07e7f7b8b9659c7052119472
SSDEEP

12288:EZv3F8h86NMcoGuc3FXE4WrIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIB:Ep3F8Au3FPW9

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

defeatwax.ru

refabyd.info

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
4048	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\cbtrqygp\ImagePath = "C:\\Windows\\SysWOW64\\cbtrqygp\\rgtpbatf.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-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e.exe

Deletes itself 1 IoCs

pid	Process
1104	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3744	rgtpbatf.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3744 set thread context of 1104	3744	rgtpbatf.exe	103

Launches sc.exe 3 IoCs

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

pid	Process
3456	sc.exe
3224	sc.exe
4904	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
3164	4932	WerFault.exe	82
2400	3744	WerFault.exe	94

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	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e.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	rgtpbatf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4932 wrote to memory of 3560	4932	b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e.exe	83
PID 4932 wrote to memory of 3560	4932	b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e.exe	83
PID 4932 wrote to memory of 3560	4932	b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e.exe	83
PID 4932 wrote to memory of 2392	4932	b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e.exe	85
PID 4932 wrote to memory of 2392	4932	b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e.exe	85
PID 4932 wrote to memory of 2392	4932	b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e.exe	85
PID 4932 wrote to memory of 3456	4932	b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e.exe	87
PID 4932 wrote to memory of 3456	4932	b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e.exe	87
PID 4932 wrote to memory of 3456	4932	b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e.exe	87
PID 4932 wrote to memory of 3224	4932	b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e.exe	89
PID 4932 wrote to memory of 3224	4932	b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e.exe	89
PID 4932 wrote to memory of 3224	4932	b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e.exe	89
PID 4932 wrote to memory of 4904	4932	b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e.exe	92
PID 4932 wrote to memory of 4904	4932	b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e.exe	92
PID 4932 wrote to memory of 4904	4932	b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e.exe	92
PID 4932 wrote to memory of 4048	4932	b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e.exe	97
PID 4932 wrote to memory of 4048	4932	b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e.exe	97
PID 4932 wrote to memory of 4048	4932	b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e.exe	97
PID 3744 wrote to memory of 1104	3744	rgtpbatf.exe	103
PID 3744 wrote to memory of 1104	3744	rgtpbatf.exe	103
PID 3744 wrote to memory of 1104	3744	rgtpbatf.exe	103
PID 3744 wrote to memory of 1104	3744	rgtpbatf.exe	103
PID 3744 wrote to memory of 1104	3744	rgtpbatf.exe	103

C:\Users\Admin\AppData\Local\Temp\b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e.exe
"C:\Users\Admin\AppData\Local\Temp\b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4932
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\cbtrqygp\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3560
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\rgtpbatf.exe" C:\Windows\SysWOW64\cbtrqygp\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2392
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create cbtrqygp binPath= "C:\Windows\SysWOW64\cbtrqygp\rgtpbatf.exe /d\"C:\Users\Admin\AppData\Local\Temp\b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3456
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description cbtrqygp "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3224
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start cbtrqygp
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4904
- 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:4048
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4932 -s 1308
  2⤵
  - Program crash
  PID:3164

C:\Windows\SysWOW64\cbtrqygp\rgtpbatf.exe
C:\Windows\SysWOW64\cbtrqygp\rgtpbatf.exe /d"C:\Users\Admin\AppData\Local\Temp\b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3744
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:1104
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3744 -s 508
  2⤵
  - Program crash
  PID:2400

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4932 -ip 4932
1⤵
PID:3912

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 3744 -ip 3744
1⤵
PID:5080

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\rgtpbatf.exe

Filesize
14.2MB

MD5
e5e1992b46b35bcfc3c30ea284fb9696

SHA1
9500b38adcfbc89ae7026819dbe10ae06a6b67e1

SHA256
6b5b34b5fe59e3666f7fd0f2af7fc242260185fce21b47d5b4b0be8357beb7d4

SHA512
c2beeb74fab0e65abe0c615cebb0fd25f2397e8fc78bf2b825d1947229e5a31cca2ecd258260f53f74f74cb7ae42c8cf566589c5472689365b3c5b6885ec8b6c

Download Submit
memory/1104-13-0x0000000000F30000-0x0000000000F45000-memory.dmp

Filesize
84KB

Download
memory/1104-16-0x0000000000F30000-0x0000000000F45000-memory.dmp

Filesize
84KB

Download
memory/1104-15-0x0000000000F30000-0x0000000000F45000-memory.dmp

Filesize
84KB

Download
memory/3744-11-0x0000000000400000-0x000000000044D000-memory.dmp

Filesize
308KB

Download
memory/3744-12-0x0000000000400000-0x000000000044D000-memory.dmp

Filesize
308KB

Download
memory/3744-18-0x0000000000400000-0x000000000044D000-memory.dmp

Filesize
308KB

Download
memory/4932-9-0x0000000000680000-0x0000000000693000-memory.dmp

Filesize
76KB

Download
memory/4932-8-0x0000000000400000-0x000000000044D000-memory.dmp

Filesize
308KB

Download
memory/4932-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4932-2-0x0000000000680000-0x0000000000693000-memory.dmp

Filesize
76KB

Download
memory/4932-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4932-1-0x00000000006F0000-0x00000000007F0000-memory.dmp

Filesize
1024KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads