tofsee | 8f821adb70354fb82267e5c52d0ad22663850f535f3d4d97c7dd888109ab2d8e

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
16/07/2024, 02:12

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General

Target
4c64a39b8cd718a94c4f8982a4f27fc3_JaffaCakes118.exe
Size 11.7MB
Sample240716-cm8dyszhkj
SHA256 8f821adb70354fb82267e5c52d0ad22663850f535f3d4d97c7dd888109ab2d8e
MD5 4c64a39b8cd718a94c4f8982a4f27fc3
SHA1 8694c0712006fd288510d42071c9c1938ea99946
SHA512 f9dac7001475b489b3961524cbbd99870bd8f8279b44b0aed93cc66103822a70a13df44efaf620bb33037be1e9387103c2db18f7311343d6be4b255c705a40f2
SSDEEP 196608:XT66666666666666666666666666666666666666666666666666666666666666:X
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
2340	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\plbxdbke\ImagePath = "C:\\Windows\\SysWOW64\\plbxdbke\\fvvvkbhz.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-1-5-21-2990742725-2267136959-192470804-1000\Control Panel\International\Geo\Nation	4c64a39b8cd718a94c4f8982a4f27fc3_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
1884	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
316	fvvvkbhz.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 316 set thread context of 1884	316	fvvvkbhz.exe	102

Launches sc.exe 3 IoCs

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

pid	Process
3208	sc.exe
244	sc.exe
2112	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
2220	4296	WerFault.exe	82
4496	316	WerFault.exe	96

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4296 wrote to memory of 2972	4296	4c64a39b8cd718a94c4f8982a4f27fc3_JaffaCakes118.exe	86
PID 4296 wrote to memory of 2972	4296	4c64a39b8cd718a94c4f8982a4f27fc3_JaffaCakes118.exe	86
PID 4296 wrote to memory of 2972	4296	4c64a39b8cd718a94c4f8982a4f27fc3_JaffaCakes118.exe	86
PID 4296 wrote to memory of 1200	4296	4c64a39b8cd718a94c4f8982a4f27fc3_JaffaCakes118.exe	88
PID 4296 wrote to memory of 1200	4296	4c64a39b8cd718a94c4f8982a4f27fc3_JaffaCakes118.exe	88
PID 4296 wrote to memory of 1200	4296	4c64a39b8cd718a94c4f8982a4f27fc3_JaffaCakes118.exe	88
PID 4296 wrote to memory of 3208	4296	4c64a39b8cd718a94c4f8982a4f27fc3_JaffaCakes118.exe	90
PID 4296 wrote to memory of 3208	4296	4c64a39b8cd718a94c4f8982a4f27fc3_JaffaCakes118.exe	90
PID 4296 wrote to memory of 3208	4296	4c64a39b8cd718a94c4f8982a4f27fc3_JaffaCakes118.exe	90
PID 4296 wrote to memory of 244	4296	4c64a39b8cd718a94c4f8982a4f27fc3_JaffaCakes118.exe	92
PID 4296 wrote to memory of 244	4296	4c64a39b8cd718a94c4f8982a4f27fc3_JaffaCakes118.exe	92
PID 4296 wrote to memory of 244	4296	4c64a39b8cd718a94c4f8982a4f27fc3_JaffaCakes118.exe	92
PID 4296 wrote to memory of 2112	4296	4c64a39b8cd718a94c4f8982a4f27fc3_JaffaCakes118.exe	94
PID 4296 wrote to memory of 2112	4296	4c64a39b8cd718a94c4f8982a4f27fc3_JaffaCakes118.exe	94
PID 4296 wrote to memory of 2112	4296	4c64a39b8cd718a94c4f8982a4f27fc3_JaffaCakes118.exe	94
PID 4296 wrote to memory of 2340	4296	4c64a39b8cd718a94c4f8982a4f27fc3_JaffaCakes118.exe	97
PID 4296 wrote to memory of 2340	4296	4c64a39b8cd718a94c4f8982a4f27fc3_JaffaCakes118.exe	97
PID 4296 wrote to memory of 2340	4296	4c64a39b8cd718a94c4f8982a4f27fc3_JaffaCakes118.exe	97
PID 316 wrote to memory of 1884	316	fvvvkbhz.exe	102
PID 316 wrote to memory of 1884	316	fvvvkbhz.exe	102
PID 316 wrote to memory of 1884	316	fvvvkbhz.exe	102
PID 316 wrote to memory of 1884	316	fvvvkbhz.exe	102
PID 316 wrote to memory of 1884	316	fvvvkbhz.exe	102

C:\Users\Admin\AppData\Local\Temp\4c64a39b8cd718a94c4f8982a4f27fc3_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\4c64a39b8cd718a94c4f8982a4f27fc3_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4296
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\plbxdbke\
  2⤵
  PID:2972
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\fvvvkbhz.exe" C:\Windows\SysWOW64\plbxdbke\
  2⤵
  PID:1200
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create plbxdbke binPath= "C:\Windows\SysWOW64\plbxdbke\fvvvkbhz.exe /d\"C:\Users\Admin\AppData\Local\Temp\4c64a39b8cd718a94c4f8982a4f27fc3_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:3208
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description plbxdbke "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:244
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start plbxdbke
  2⤵
  - Launches sc.exe
  PID:2112
- 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:2340
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4296 -s 1184
  2⤵
  - Program crash
  PID:2220

C:\Windows\SysWOW64\plbxdbke\fvvvkbhz.exe
C:\Windows\SysWOW64\plbxdbke\fvvvkbhz.exe /d"C:\Users\Admin\AppData\Local\Temp\4c64a39b8cd718a94c4f8982a4f27fc3_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:316
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:1884
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 316 -s 516
  2⤵
  - Program crash
  PID:4496

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 4296 -ip 4296
1⤵
PID:4876

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 552 -p 316 -ip 316
1⤵
PID:2644

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

fvvvkbhz.exe

Path C:\Users\Admin\AppData\Local\Temp\fvvvkbhz.exe
Size 12.3MB
SHA256 e7890d61ed138cd9bd87cfb9419a3dcae05c7dbe37d9287dc3d499a5d7ad8f6b
MD5 902a995115ab1715336a37d9a316812e
SHA1 8013fca329e95082141920abd5a8001fced47655
SHA512 a885872a09c7ed193e6e4268b95cda25e32bfe3ce668d9d602d8a8fcfd9abadbaee352f967701cea229a0b12e62399fe723f64ce5411d65431e61caa563828f0
SSDEEP 196608:pT6666666666666666666666666666666666666666666666666666666666666/:p
MD5 SHA1 SHA512 SSDEEP

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memory/316-14-0x0000000000400000-0x000000000086F000-memory.dmp

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memory/316-15-0x0000000000400000-0x000000000086F000-memory.dmp

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memory/1884-11-0x0000000000AB0000-0x0000000000AC5000-memory.dmp

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memory/1884-13-0x0000000000AB0000-0x0000000000AC5000-memory.dmp

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memory/1884-17-0x0000000000AB0000-0x0000000000AC5000-memory.dmp

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memory/4296-1-0x0000000000B00000-0x0000000000C00000-memory.dmp

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memory/4296-2-0x00000000001C0000-0x00000000001D3000-memory.dmp

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memory/4296-3-0x0000000000400000-0x0000000000415000-memory.dmp

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memory/4296-10-0x0000000000400000-0x0000000000415000-memory.dmp

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memory/4296-9-0x00000000001C0000-0x00000000001D3000-memory.dmp

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memory/4296-8-0x0000000000400000-0x000000000086F000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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