tofsee | c37556c43f554973600e08a3bbc2a41d67b814938cdc9c4aee819afe2aad9f51

General

Target
c37556c43f554973600e08a3bbc2a41d67b814938cdc9c4aee819afe2aad9f51.exe
Size 13.3MB
Sample261104-nes5vadb74
SHA256 c37556c43f554973600e08a3bbc2a41d67b814938cdc9c4aee819afe2aad9f51
MD5 caff4cb1d853830994014b2f42484c52
SHA1 8827edce75ad9e524031a4669770e5b25ea37166
SHA512 2012a8d0663a10162d1d8d36c2c809008cce2207aa1a755ef3ed5b9cd10718d7b71f09d22ffd125a688ea335393ac4502f74c9541dc44092d43d8b05558531ad
SSDEEP 49152:Ezp2frvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvb:Ek
TLSH
T1EDE6436676D86ED9D0CA0FBC09A1C42B5DECFB34043A553096D1504F98AE78A973CBB3
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

defense_evasion discovery execution tofsee persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

defeatwax.ru
refabyd.info

Signatures

Family: Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee

Modifies Windows Firewall 2 TTPs 1 IoCs

defense_evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
1204	netsh.exe

Creates new service(s) 2 TTPs
persistence execution

Windows Service
T1543.003

Service Execution
T1569.002

Executes dropped EXE 1 IoCs

pid	Process
4960	rpeqkgrh.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4960 set thread context of 4680	4960	rpeqkgrh.exe	103

Launches sc.exe 3 IoCs

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

pid	Process
1552	sc.exe
2248	sc.exe
620	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 value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

Executes a command shell one-liner 1 TTPs 2 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
2632	cmd.exe
2720	cmd.exe

System Location Discovery: System Language Discovery 1 TTPs 8 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	rpeqkgrh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	c37556c43f554973600e08a3bbc2a41d67b814938cdc9c4aee819afe2aad9f51.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

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 5096 wrote to memory of 2632	5096	c37556c43f554973600e08a3bbc2a41d67b814938cdc9c4aee819afe2aad9f51.exe	91
PID 5096 wrote to memory of 2720	5096	c37556c43f554973600e08a3bbc2a41d67b814938cdc9c4aee819afe2aad9f51.exe	93
PID 5096 wrote to memory of 620	5096	c37556c43f554973600e08a3bbc2a41d67b814938cdc9c4aee819afe2aad9f51.exe	95
PID 5096 wrote to memory of 1552	5096	c37556c43f554973600e08a3bbc2a41d67b814938cdc9c4aee819afe2aad9f51.exe	98
PID 5096 wrote to memory of 2248	5096	c37556c43f554973600e08a3bbc2a41d67b814938cdc9c4aee819afe2aad9f51.exe	100
PID 4960 wrote to memory of 4680	4960	rpeqkgrh.exe	103
PID 4960 wrote to memory of 4680	4960	rpeqkgrh.exe	103
PID 5096 wrote to memory of 1204	5096	c37556c43f554973600e08a3bbc2a41d67b814938cdc9c4aee819afe2aad9f51.exe	104

C:\Users\Admin\AppData\Local\Temp\c37556c43f554973600e08a3bbc2a41d67b814938cdc9c4aee819afe2aad9f51.exe
"C:\Users\Admin\AppData\Local\Temp\c37556c43f554973600e08a3bbc2a41d67b814938cdc9c4aee819afe2aad9f51.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5096
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\pqapawwd\
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  PID:2632
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\rpeqkgrh.exe" C:\Windows\SysWOW64\pqapawwd\
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  PID:2720
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create pqapawwd binPath= "C:\Windows\SysWOW64\pqapawwd\rpeqkgrh.exe /d\"C:\Users\Admin\AppData\Local\Temp\c37556c43f554973600e08a3bbc2a41d67b814938cdc9c4aee819afe2aad9f51.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:620
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description pqapawwd "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1552
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start pqapawwd
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2248
- 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:1204

C:\Windows\SysWOW64\pqapawwd\rpeqkgrh.exe
C:\Windows\SysWOW64\pqapawwd\rpeqkgrh.exe /d"C:\Users\Admin\AppData\Local\Temp\c37556c43f554973600e08a3bbc2a41d67b814938cdc9c4aee819afe2aad9f51.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4960
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  PID:4680

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k GPSvcGroup
1⤵
PID:5716

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Windows Command Shell

1

T1059.003

System Services

1

T1569

Service Execution

1

T1569.002

Persistence

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

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

1

T1562.004

Credential Access

Discovery

System Information Discovery

1

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

rpeqkgrh.exe

Path C:\Users\Admin\AppData\Local\Temp\rpeqkgrh.exe
Size 14.9MB
SHA256 6f80ceed8818e59eb863fe3dc3ed5d2d01c44ccf8cb00f021247581c163948ba
MD5 5bb1b55ac381378026ab8895e4ef0de2
SHA1 1a0e4388a8b04000d6465b5ea9b44c1866439abc
SHA512 8e839035d5e3500bcd7db2b2d3290bdc242032b65442321c777e18021f55acf5718b62ef6d0f977cec3d6bd3f9d8529bf37cef68badffe3254f9b641b04b2cc4
SSDEEP 49152:qzp2frvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvL:qk
TLSH
T1E4F6436676D86ED9D0CA0FBC09A1C42B5DECFB34043A553096D1504F98AE78A973CBB3
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/4680-6-0x0000000000680000-0x00000000006C9000-memory.dmp

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memory/4960-5-0x0000000000400000-0x0000000000449000-memory.dmp

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memory/4960-9-0x0000000000400000-0x0000000000449000-memory.dmp

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memory/5096-0-0x0000000000400000-0x0000000000449000-memory.dmp

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memory/5096-10-0x0000000000400000-0x0000000000449000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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