tofsee | cf426b4bd4d5243c3d88355b980084776d885c36dfb179975f28af9578deaf0c

General

Target

cf426b4bd4d5243c3d88355b980084776d885c36dfb179975f28af9578deaf0c.exe
Size

167KB
MD5

c2dd5c2437c8dfee1e944b43354c2345
SHA1

6b4275b19ac0d4c976beee7b774ffe304376da8f
SHA256

cf426b4bd4d5243c3d88355b980084776d885c36dfb179975f28af9578deaf0c
SHA512

892e044aa9fa4b29912c70a927cb6d72f952c333662cc22a08649aa1f639be53f54ab4409a2f5305ce8651ff2c7503609542748c8b9960a1260e505664070e36
SSDEEP

3072:HWt4tFAaLDnwOa8aCj9LRnj1A752+HoALd1HHX:2ALDwB8awTnj3+HoiP

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
1272	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\vxagohnt\ImagePath = "C:\\Windows\\SysWOW64\\vxagohnt\\dpwqvbow.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-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	cf426b4bd4d5243c3d88355b980084776d885c36dfb179975f28af9578deaf0c.exe

Deletes itself 1 IoCs

pid	Process
4556	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2984	dpwqvbow.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2984 set thread context of 4556	2984	dpwqvbow.exe	102

Launches sc.exe 3 IoCs

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

pid	Process
1912	sc.exe
1616	sc.exe
2612	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
4896	4828	WerFault.exe	81
4452	2984	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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.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	dpwqvbow.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cf426b4bd4d5243c3d88355b980084776d885c36dfb179975f28af9578deaf0c.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4828 wrote to memory of 2452	4828	cf426b4bd4d5243c3d88355b980084776d885c36dfb179975f28af9578deaf0c.exe	82
PID 4828 wrote to memory of 2452	4828	cf426b4bd4d5243c3d88355b980084776d885c36dfb179975f28af9578deaf0c.exe	82
PID 4828 wrote to memory of 2452	4828	cf426b4bd4d5243c3d88355b980084776d885c36dfb179975f28af9578deaf0c.exe	82
PID 4828 wrote to memory of 3556	4828	cf426b4bd4d5243c3d88355b980084776d885c36dfb179975f28af9578deaf0c.exe	84
PID 4828 wrote to memory of 3556	4828	cf426b4bd4d5243c3d88355b980084776d885c36dfb179975f28af9578deaf0c.exe	84
PID 4828 wrote to memory of 3556	4828	cf426b4bd4d5243c3d88355b980084776d885c36dfb179975f28af9578deaf0c.exe	84
PID 4828 wrote to memory of 1912	4828	cf426b4bd4d5243c3d88355b980084776d885c36dfb179975f28af9578deaf0c.exe	86
PID 4828 wrote to memory of 1912	4828	cf426b4bd4d5243c3d88355b980084776d885c36dfb179975f28af9578deaf0c.exe	86
PID 4828 wrote to memory of 1912	4828	cf426b4bd4d5243c3d88355b980084776d885c36dfb179975f28af9578deaf0c.exe	86
PID 4828 wrote to memory of 1616	4828	cf426b4bd4d5243c3d88355b980084776d885c36dfb179975f28af9578deaf0c.exe	88
PID 4828 wrote to memory of 1616	4828	cf426b4bd4d5243c3d88355b980084776d885c36dfb179975f28af9578deaf0c.exe	88
PID 4828 wrote to memory of 1616	4828	cf426b4bd4d5243c3d88355b980084776d885c36dfb179975f28af9578deaf0c.exe	88
PID 4828 wrote to memory of 2612	4828	cf426b4bd4d5243c3d88355b980084776d885c36dfb179975f28af9578deaf0c.exe	90
PID 4828 wrote to memory of 2612	4828	cf426b4bd4d5243c3d88355b980084776d885c36dfb179975f28af9578deaf0c.exe	90
PID 4828 wrote to memory of 2612	4828	cf426b4bd4d5243c3d88355b980084776d885c36dfb179975f28af9578deaf0c.exe	90
PID 4828 wrote to memory of 1272	4828	cf426b4bd4d5243c3d88355b980084776d885c36dfb179975f28af9578deaf0c.exe	93
PID 4828 wrote to memory of 1272	4828	cf426b4bd4d5243c3d88355b980084776d885c36dfb179975f28af9578deaf0c.exe	93
PID 4828 wrote to memory of 1272	4828	cf426b4bd4d5243c3d88355b980084776d885c36dfb179975f28af9578deaf0c.exe	93
PID 2984 wrote to memory of 4556	2984	dpwqvbow.exe	102
PID 2984 wrote to memory of 4556	2984	dpwqvbow.exe	102
PID 2984 wrote to memory of 4556	2984	dpwqvbow.exe	102
PID 2984 wrote to memory of 4556	2984	dpwqvbow.exe	102
PID 2984 wrote to memory of 4556	2984	dpwqvbow.exe	102

C:\Users\Admin\AppData\Local\Temp\cf426b4bd4d5243c3d88355b980084776d885c36dfb179975f28af9578deaf0c.exe
"C:\Users\Admin\AppData\Local\Temp\cf426b4bd4d5243c3d88355b980084776d885c36dfb179975f28af9578deaf0c.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4828
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\vxagohnt\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2452
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\dpwqvbow.exe" C:\Windows\SysWOW64\vxagohnt\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3556
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create vxagohnt binPath= "C:\Windows\SysWOW64\vxagohnt\dpwqvbow.exe /d\"C:\Users\Admin\AppData\Local\Temp\cf426b4bd4d5243c3d88355b980084776d885c36dfb179975f28af9578deaf0c.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1912
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description vxagohnt "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1616
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start vxagohnt
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2612
- 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:1272
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4828 -s 1036
  2⤵
  - Program crash
  PID:4896

C:\Windows\SysWOW64\vxagohnt\dpwqvbow.exe
C:\Windows\SysWOW64\vxagohnt\dpwqvbow.exe /d"C:\Users\Admin\AppData\Local\Temp\cf426b4bd4d5243c3d88355b980084776d885c36dfb179975f28af9578deaf0c.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2984
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:4556
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2984 -s 516
  2⤵
  - Program crash
  PID:4452

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4828 -ip 4828
1⤵
PID:3728

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 2984 -ip 2984
1⤵
PID:3840

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\dpwqvbow.exe

Filesize
10.7MB

MD5
867f3205a79ed789229dd2d328db9959

SHA1
14798928932fcb910645c48cca730eba89c3829b

SHA256
fa5e65bfbdc34cabccb25c7a092eb42ea01f69798ee6baf6e72a7c3d5553da74

SHA512
7cfc286d9808050d955b43c87b4d287f7874d18e884c134935e77f20f2e669d3123ad449a1efb5f14764e86fc6a669d1b8cec5449c0ef6f74ef6a019bb496764

Download Submit
memory/2984-11-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/2984-19-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/2984-14-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/2984-12-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/4556-13-0x0000000000D90000-0x0000000000DA5000-memory.dmp

Filesize
84KB

Download
memory/4556-16-0x0000000000D90000-0x0000000000DA5000-memory.dmp

Filesize
84KB

Download
memory/4556-17-0x0000000000D90000-0x0000000000DA5000-memory.dmp

Filesize
84KB

Download
memory/4828-9-0x0000000002210000-0x0000000002223000-memory.dmp

Filesize
76KB

Download
memory/4828-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4828-8-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/4828-2-0x0000000002210000-0x0000000002223000-memory.dmp

Filesize
76KB

Download
memory/4828-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4828-1-0x0000000000530000-0x0000000000630000-memory.dmp

Filesize
1024KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads