tofsee | f368d83d2a61b7f8f997de5ea34dbdc7bf407b4b53dbb60e47afac4a3b6189d5

Analysis

max time kernel
150s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
02/04/2024, 16:24

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General

Target
915b00f6ee321f9a455dcf0a30b83b90_JaffaCakes118.exe
Size 14.3MB
Sample240402-twkspafd35
SHA256 f368d83d2a61b7f8f997de5ea34dbdc7bf407b4b53dbb60e47afac4a3b6189d5
MD5 915b00f6ee321f9a455dcf0a30b83b90
SHA1 a4419d7733580efb43bfdc80bfd793796fd875f8
SHA512 79921aad82afc920bdde998203b7b55f3f937d2618de3575148a68e28de0e63bfa20c5e95478e52ff15a76262714d4248894a576fe2b9b65ac069651dabdc6b1
SSDEEP 12288:Ghq8okPz+6/uWlQJVpppppppppppppppppppppppppppppppppppppppppppppph:/Sz+R
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

tofsee evasion persistence 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) 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
1552	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\kykghsc\ImagePath = "C:\\Windows\\SysWOW64\\kykghsc\\amtnsylt.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-1-5-21-513485977-2495024337-1260977654-1000\Control Panel\International\Geo\Nation	915b00f6ee321f9a455dcf0a30b83b90_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
4928	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3948	amtnsylt.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3948 set thread context of 4928	3948	amtnsylt.exe	110

Launches sc.exe 3 IoCs

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

pid	Process
332	sc.exe
4336	sc.exe
2464	sc.exe

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

System Information Discovery
T1082

Program crash 2 IoCs

pid	pid_target	Process	procid_target
4500	2508	WerFault.exe	88
4632	3948	WerFault.exe	102

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2508 wrote to memory of 3956	2508	915b00f6ee321f9a455dcf0a30b83b90_JaffaCakes118.exe	90
PID 2508 wrote to memory of 3956	2508	915b00f6ee321f9a455dcf0a30b83b90_JaffaCakes118.exe	90
PID 2508 wrote to memory of 3956	2508	915b00f6ee321f9a455dcf0a30b83b90_JaffaCakes118.exe	90
PID 2508 wrote to memory of 736	2508	915b00f6ee321f9a455dcf0a30b83b90_JaffaCakes118.exe	92
PID 2508 wrote to memory of 736	2508	915b00f6ee321f9a455dcf0a30b83b90_JaffaCakes118.exe	92
PID 2508 wrote to memory of 736	2508	915b00f6ee321f9a455dcf0a30b83b90_JaffaCakes118.exe	92
PID 2508 wrote to memory of 2464	2508	915b00f6ee321f9a455dcf0a30b83b90_JaffaCakes118.exe	94
PID 2508 wrote to memory of 2464	2508	915b00f6ee321f9a455dcf0a30b83b90_JaffaCakes118.exe	94
PID 2508 wrote to memory of 2464	2508	915b00f6ee321f9a455dcf0a30b83b90_JaffaCakes118.exe	94
PID 2508 wrote to memory of 332	2508	915b00f6ee321f9a455dcf0a30b83b90_JaffaCakes118.exe	96
PID 2508 wrote to memory of 332	2508	915b00f6ee321f9a455dcf0a30b83b90_JaffaCakes118.exe	96
PID 2508 wrote to memory of 332	2508	915b00f6ee321f9a455dcf0a30b83b90_JaffaCakes118.exe	96
PID 2508 wrote to memory of 4336	2508	915b00f6ee321f9a455dcf0a30b83b90_JaffaCakes118.exe	100
PID 2508 wrote to memory of 4336	2508	915b00f6ee321f9a455dcf0a30b83b90_JaffaCakes118.exe	100
PID 2508 wrote to memory of 4336	2508	915b00f6ee321f9a455dcf0a30b83b90_JaffaCakes118.exe	100
PID 2508 wrote to memory of 1552	2508	915b00f6ee321f9a455dcf0a30b83b90_JaffaCakes118.exe	103
PID 2508 wrote to memory of 1552	2508	915b00f6ee321f9a455dcf0a30b83b90_JaffaCakes118.exe	103
PID 2508 wrote to memory of 1552	2508	915b00f6ee321f9a455dcf0a30b83b90_JaffaCakes118.exe	103
PID 3948 wrote to memory of 4928	3948	amtnsylt.exe	110
PID 3948 wrote to memory of 4928	3948	amtnsylt.exe	110
PID 3948 wrote to memory of 4928	3948	amtnsylt.exe	110
PID 3948 wrote to memory of 4928	3948	amtnsylt.exe	110
PID 3948 wrote to memory of 4928	3948	amtnsylt.exe	110

C:\Users\Admin\AppData\Local\Temp\915b00f6ee321f9a455dcf0a30b83b90_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\915b00f6ee321f9a455dcf0a30b83b90_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2508
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\kykghsc\
  2⤵
  PID:3956
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\amtnsylt.exe" C:\Windows\SysWOW64\kykghsc\
  2⤵
  PID:736
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create kykghsc binPath= "C:\Windows\SysWOW64\kykghsc\amtnsylt.exe /d\"C:\Users\Admin\AppData\Local\Temp\915b00f6ee321f9a455dcf0a30b83b90_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:2464
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description kykghsc "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:332
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start kykghsc
  2⤵
  - Launches sc.exe
  PID:4336
- 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:1552
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2508 -s 796
  2⤵
  - Program crash
  PID:4500

C:\Windows\SysWOW64\kykghsc\amtnsylt.exe
C:\Windows\SysWOW64\kykghsc\amtnsylt.exe /d"C:\Users\Admin\AppData\Local\Temp\915b00f6ee321f9a455dcf0a30b83b90_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3948
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:4928
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3948 -s 516
  2⤵
  - Program crash
  PID:4632

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 2508 -ip 2508
1⤵
PID:912

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 3948 -ip 3948
1⤵
PID:1400

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

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

amtnsylt.exe

Path C:\Users\Admin\AppData\Local\Temp\amtnsylt.exe
Size 12.1MB
SHA256 a033a22733dff33580344e4b6c8c51e841f1507a75e36f2f932bd7d806262990
MD5 af9befaca8679db49454a4aa6cf960cb
SHA1 aa6bfefd0266a3a22e68a349d39749878bfa8969
SHA512 a9d80ee5d034c82224d53c9ccae4513d5994adcdcd3065cefaf553675ebc177b34b920ac876826cc9295cbf7cde073ff7d6049517ac4fc2b881d8339a3379978
SSDEEP 12288:qhq8okPz+6/uWlQJVppppppppppppppppppppppppppppppppppppppppppppppp:TSz+R
MD5 SHA1 SHA512 SSDEEP

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memory/2508-1-0x00000000009A0000-0x0000000000AA0000-memory.dmp

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memory/2508-2-0x0000000000CE0000-0x0000000000CF3000-memory.dmp

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memory/2508-4-0x0000000000400000-0x000000000086F000-memory.dmp

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memory/2508-8-0x0000000000400000-0x000000000086F000-memory.dmp

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memory/2508-9-0x0000000000CE0000-0x0000000000CF3000-memory.dmp

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memory/3948-10-0x00000000009C0000-0x0000000000AC0000-memory.dmp

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memory/3948-11-0x0000000000400000-0x000000000086F000-memory.dmp

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memory/3948-17-0x0000000000400000-0x000000000086F000-memory.dmp

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memory/4928-12-0x0000000000960000-0x0000000000975000-memory.dmp

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memory/4928-16-0x0000000000960000-0x0000000000975000-memory.dmp

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memory/4928-18-0x0000000000960000-0x0000000000975000-memory.dmp

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memory/4928-19-0x0000000000960000-0x0000000000975000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads