tofsee | 97d0ba8f894b85f3f70a6178237202b905ee26b085419fef0710a06f2b715e07

Analysis

max time kernel
145s
max time network
128s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
17/04/2024, 09:16

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General

Target

f57318e139826014dbcc8f0eaad35e40_JaffaCakes118.exe
Size

12.5MB
MD5

f57318e139826014dbcc8f0eaad35e40
SHA1

39d26c2ffbb92c2f5b443ae094a84b1bf760aea2
SHA256

97d0ba8f894b85f3f70a6178237202b905ee26b085419fef0710a06f2b715e07
SHA512

e0a9568659e0ebd2a64b4c4e1fb070e2c4b946ec10a63b301221b5b9528c532da9ea90f535a8037e514faf210649a214bca001d3e4b45f1ac5dd09640a345b4c
SSDEEP

49152:g8yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyye:g

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

43.231.4.6

lazystax.ru

Signatures

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

Windows security bypass 2 TTPs 1 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\SysWOW64\xkavcbyn = "0"	svchost.exe

Creates new service(s) 1 TTPs
persistence

Windows Service
T1543.003

Modifies Windows Firewall 2 TTPs 1 IoCs

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
2964	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\xkavcbyn\ImagePath = "C:\\Windows\\SysWOW64\\xkavcbyn\\ycnfjqrx.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2504	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2604	ycnfjqrx.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2604 set thread context of 2504	2604	ycnfjqrx.exe	41

Launches sc.exe 3 IoCs

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

pid	Process
2148	sc.exe
2664	sc.exe
2588	sc.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2512 wrote to memory of 2568	2512	f57318e139826014dbcc8f0eaad35e40_JaffaCakes118.exe	28
PID 2512 wrote to memory of 2568	2512	f57318e139826014dbcc8f0eaad35e40_JaffaCakes118.exe	28
PID 2512 wrote to memory of 2568	2512	f57318e139826014dbcc8f0eaad35e40_JaffaCakes118.exe	28
PID 2512 wrote to memory of 2568	2512	f57318e139826014dbcc8f0eaad35e40_JaffaCakes118.exe	28
PID 2512 wrote to memory of 2680	2512	f57318e139826014dbcc8f0eaad35e40_JaffaCakes118.exe	30
PID 2512 wrote to memory of 2680	2512	f57318e139826014dbcc8f0eaad35e40_JaffaCakes118.exe	30
PID 2512 wrote to memory of 2680	2512	f57318e139826014dbcc8f0eaad35e40_JaffaCakes118.exe	30
PID 2512 wrote to memory of 2680	2512	f57318e139826014dbcc8f0eaad35e40_JaffaCakes118.exe	30
PID 2512 wrote to memory of 2148	2512	f57318e139826014dbcc8f0eaad35e40_JaffaCakes118.exe	32
PID 2512 wrote to memory of 2148	2512	f57318e139826014dbcc8f0eaad35e40_JaffaCakes118.exe	32
PID 2512 wrote to memory of 2148	2512	f57318e139826014dbcc8f0eaad35e40_JaffaCakes118.exe	32
PID 2512 wrote to memory of 2148	2512	f57318e139826014dbcc8f0eaad35e40_JaffaCakes118.exe	32
PID 2512 wrote to memory of 2664	2512	f57318e139826014dbcc8f0eaad35e40_JaffaCakes118.exe	34
PID 2512 wrote to memory of 2664	2512	f57318e139826014dbcc8f0eaad35e40_JaffaCakes118.exe	34
PID 2512 wrote to memory of 2664	2512	f57318e139826014dbcc8f0eaad35e40_JaffaCakes118.exe	34
PID 2512 wrote to memory of 2664	2512	f57318e139826014dbcc8f0eaad35e40_JaffaCakes118.exe	34
PID 2512 wrote to memory of 2588	2512	f57318e139826014dbcc8f0eaad35e40_JaffaCakes118.exe	36
PID 2512 wrote to memory of 2588	2512	f57318e139826014dbcc8f0eaad35e40_JaffaCakes118.exe	36
PID 2512 wrote to memory of 2588	2512	f57318e139826014dbcc8f0eaad35e40_JaffaCakes118.exe	36
PID 2512 wrote to memory of 2588	2512	f57318e139826014dbcc8f0eaad35e40_JaffaCakes118.exe	36
PID 2512 wrote to memory of 2964	2512	f57318e139826014dbcc8f0eaad35e40_JaffaCakes118.exe	39
PID 2512 wrote to memory of 2964	2512	f57318e139826014dbcc8f0eaad35e40_JaffaCakes118.exe	39
PID 2512 wrote to memory of 2964	2512	f57318e139826014dbcc8f0eaad35e40_JaffaCakes118.exe	39
PID 2512 wrote to memory of 2964	2512	f57318e139826014dbcc8f0eaad35e40_JaffaCakes118.exe	39
PID 2604 wrote to memory of 2504	2604	ycnfjqrx.exe	41
PID 2604 wrote to memory of 2504	2604	ycnfjqrx.exe	41
PID 2604 wrote to memory of 2504	2604	ycnfjqrx.exe	41
PID 2604 wrote to memory of 2504	2604	ycnfjqrx.exe	41
PID 2604 wrote to memory of 2504	2604	ycnfjqrx.exe	41
PID 2604 wrote to memory of 2504	2604	ycnfjqrx.exe	41

C:\Users\Admin\AppData\Local\Temp\f57318e139826014dbcc8f0eaad35e40_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f57318e139826014dbcc8f0eaad35e40_JaffaCakes118.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2512
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\xkavcbyn\
  2⤵
  PID:2568
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ycnfjqrx.exe" C:\Windows\SysWOW64\xkavcbyn\
  2⤵
  PID:2680
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create xkavcbyn binPath= "C:\Windows\SysWOW64\xkavcbyn\ycnfjqrx.exe /d\"C:\Users\Admin\AppData\Local\Temp\f57318e139826014dbcc8f0eaad35e40_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:2148
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description xkavcbyn "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:2664
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start xkavcbyn
  2⤵
  - Launches sc.exe
  PID:2588
- 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
  PID:2964

C:\Windows\SysWOW64\xkavcbyn\ycnfjqrx.exe
C:\Windows\SysWOW64\xkavcbyn\ycnfjqrx.exe /d"C:\Users\Admin\AppData\Local\Temp\f57318e139826014dbcc8f0eaad35e40_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2604
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Windows security bypass
  - Sets service image path in registry
  - Deletes itself
  PID:2504

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

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

Defense Evasion

Impair Defenses

T1562

Disable or Modify System Firewall

T1562.004

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\ycnfjqrx.exe

Filesize
14.8MB

MD5
32c58fe060239c51930df529e6cd2087

SHA1
5511b9ff1435076dcb795baf091ff7c2fc7c70fd

SHA256
4607fede4785e190decddfe643dd719934e16e83875a8136a8c39317af0c555c

SHA512
4cc21e01dff34e06668d3c12e30889aafc358d87866da2d15603320586cd06129cf21cbe2398aaf9f49cd07eb0e489384d2161c9626c84fd5bab9d1511e3137b

Download Submit
memory/2504-11-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2504-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2504-22-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2504-21-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2504-20-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2504-15-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2512-8-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download
memory/2512-2-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download
memory/2512-4-0x0000000000400000-0x00000000008E9000-memory.dmp

Filesize
4.9MB

Download
memory/2512-7-0x0000000000400000-0x00000000008E9000-memory.dmp

Filesize
4.9MB

Download
memory/2512-1-0x00000000002D0000-0x00000000003D0000-memory.dmp

Filesize
1024KB

Download
memory/2604-13-0x0000000000400000-0x00000000008E9000-memory.dmp

Filesize
4.9MB

Download
memory/2604-10-0x0000000000AB0000-0x0000000000BB0000-memory.dmp

Filesize
1024KB

Download
memory/2604-16-0x0000000000400000-0x00000000008E9000-memory.dmp

Filesize
4.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads