tofsee | 0626147a040801a50ca11aed6ad7a09a9d175b7ef2a1bd62bd32a3ca3fb71742

Analysis

max time kernel
145s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
19/07/2024, 08:52

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General

Target
5b3ddaac68b60729a22a257604222378_JaffaCakes118.exe
Size 14.6MB
Sample240719-ksvdaasdnn
SHA256 0626147a040801a50ca11aed6ad7a09a9d175b7ef2a1bd62bd32a3ca3fb71742
MD5 5b3ddaac68b60729a22a257604222378
SHA1 d2346b0cb65a4129b199389900f7c59edce73a9f
SHA512 2bea413af910ee151cf040c6bd06569b12216fe29ee7fda4de80344e68878684625b68fc1187eb9a13e100948f2efdf63df8955e1fa254f3a4f45da1f3499981
SSDEEP 12288:vj8IJUh3rNPQTN2/bMBrow6NGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGm:vDJqrFb0on
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

tofsee evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

defeatwax.ru
refabyd.info

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan 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
2272	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\vvfncoko\ImagePath = "C:\\Windows\\SysWOW64\\vvfncoko\\rywhmhvj.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-1-5-21-1176886754-713327781-2233697964-1000\Control Panel\International\Geo\Nation	5b3ddaac68b60729a22a257604222378_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
3220	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4436	rywhmhvj.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4436 set thread context of 3220	4436	rywhmhvj.exe	108

Launches sc.exe 3 IoCs

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

pid	Process
3124	sc.exe
2772	sc.exe
1020	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
4420	4456	WerFault.exe	83
2656	4436	WerFault.exe	100

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4456 wrote to memory of 4364	4456	5b3ddaac68b60729a22a257604222378_JaffaCakes118.exe	88
PID 4456 wrote to memory of 4364	4456	5b3ddaac68b60729a22a257604222378_JaffaCakes118.exe	88
PID 4456 wrote to memory of 4364	4456	5b3ddaac68b60729a22a257604222378_JaffaCakes118.exe	88
PID 4456 wrote to memory of 3192	4456	5b3ddaac68b60729a22a257604222378_JaffaCakes118.exe	90
PID 4456 wrote to memory of 3192	4456	5b3ddaac68b60729a22a257604222378_JaffaCakes118.exe	90
PID 4456 wrote to memory of 3192	4456	5b3ddaac68b60729a22a257604222378_JaffaCakes118.exe	90
PID 4456 wrote to memory of 2772	4456	5b3ddaac68b60729a22a257604222378_JaffaCakes118.exe	92
PID 4456 wrote to memory of 2772	4456	5b3ddaac68b60729a22a257604222378_JaffaCakes118.exe	92
PID 4456 wrote to memory of 2772	4456	5b3ddaac68b60729a22a257604222378_JaffaCakes118.exe	92
PID 4456 wrote to memory of 1020	4456	5b3ddaac68b60729a22a257604222378_JaffaCakes118.exe	96
PID 4456 wrote to memory of 1020	4456	5b3ddaac68b60729a22a257604222378_JaffaCakes118.exe	96
PID 4456 wrote to memory of 1020	4456	5b3ddaac68b60729a22a257604222378_JaffaCakes118.exe	96
PID 4456 wrote to memory of 3124	4456	5b3ddaac68b60729a22a257604222378_JaffaCakes118.exe	98
PID 4456 wrote to memory of 3124	4456	5b3ddaac68b60729a22a257604222378_JaffaCakes118.exe	98
PID 4456 wrote to memory of 3124	4456	5b3ddaac68b60729a22a257604222378_JaffaCakes118.exe	98
PID 4456 wrote to memory of 2272	4456	5b3ddaac68b60729a22a257604222378_JaffaCakes118.exe	102
PID 4456 wrote to memory of 2272	4456	5b3ddaac68b60729a22a257604222378_JaffaCakes118.exe	102
PID 4456 wrote to memory of 2272	4456	5b3ddaac68b60729a22a257604222378_JaffaCakes118.exe	102
PID 4436 wrote to memory of 3220	4436	rywhmhvj.exe	108
PID 4436 wrote to memory of 3220	4436	rywhmhvj.exe	108
PID 4436 wrote to memory of 3220	4436	rywhmhvj.exe	108
PID 4436 wrote to memory of 3220	4436	rywhmhvj.exe	108
PID 4436 wrote to memory of 3220	4436	rywhmhvj.exe	108

C:\Users\Admin\AppData\Local\Temp\5b3ddaac68b60729a22a257604222378_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\5b3ddaac68b60729a22a257604222378_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4456
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\vvfncoko\
  2⤵
  PID:4364
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\rywhmhvj.exe" C:\Windows\SysWOW64\vvfncoko\
  2⤵
  PID:3192
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create vvfncoko binPath= "C:\Windows\SysWOW64\vvfncoko\rywhmhvj.exe /d\"C:\Users\Admin\AppData\Local\Temp\5b3ddaac68b60729a22a257604222378_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:2772
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description vvfncoko "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:1020
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start vvfncoko
  2⤵
  - Launches sc.exe
  PID:3124
- 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
  PID:2272
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4456 -s 640
  2⤵
  - Program crash
  PID:4420

C:\Windows\SysWOW64\vvfncoko\rywhmhvj.exe
C:\Windows\SysWOW64\vvfncoko\rywhmhvj.exe /d"C:\Users\Admin\AppData\Local\Temp\5b3ddaac68b60729a22a257604222378_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4436
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:3220
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4436 -s 512
  2⤵
  - Program crash
  PID:2656

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 4456 -ip 4456
1⤵
PID:3484

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 4436 -ip 4436
1⤵
PID:4872

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

T1569

Service Execution

T1569.002

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Defense Evasion

Impair Defenses

T1562

Disable or Modify System Firewall

T1562.004

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

rywhmhvj.exe

Path C:\Users\Admin\AppData\Local\Temp\rywhmhvj.exe
Size 14.3MB
SHA256 b89728ac7e5217e61b646b0d84e5a7e9370683682005fa7991b7924a6d7e35de
MD5 ade7303ebc3243575b98dce316c024b5
SHA1 b8738a85d82b9a5716369e9b8c4e20113fa7d9a3
SHA512 f9a3548ff4e1f705e9e3fda4e866908050817c3df06ac18199e785db53422c43e372ff98312cc24c2744844478eff8b2f6af053b55724ff28dcaaef5cf33b47e
SSDEEP 12288:uj8IJUh3rNPQTN2/bMBrow6NGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGX:uDJqrFb0on
MD5 SHA1 SHA512 SSDEEP

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memory/3220-13-0x00000000001E0000-0x00000000001F5000-memory.dmp

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memory/3220-15-0x00000000001E0000-0x00000000001F5000-memory.dmp

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memory/3220-16-0x00000000001E0000-0x00000000001F5000-memory.dmp

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memory/4436-11-0x0000000000400000-0x0000000000455000-memory.dmp

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memory/4436-12-0x0000000000400000-0x0000000000455000-memory.dmp

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memory/4436-17-0x0000000000400000-0x0000000000455000-memory.dmp

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memory/4456-3-0x0000000000400000-0x0000000000415000-memory.dmp

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memory/4456-1-0x00000000004E0000-0x00000000005E0000-memory.dmp

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memory/4456-10-0x0000000000400000-0x0000000000415000-memory.dmp

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memory/4456-8-0x0000000000400000-0x0000000000455000-memory.dmp

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memory/4456-9-0x00000000008B0000-0x00000000008C3000-memory.dmp

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memory/4456-2-0x00000000008B0000-0x00000000008C3000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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