tofsee | 2024bbff3cd2a2c3d8da9bec78c5ebecc03e27238364b58a8b4caeed35afad0a

Analysis

max time kernel
135s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
31/03/2024, 20:18

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General

Target
5d21cfa58276888f704823db5791f990_JaffaCakes118.exe
Size 10.4MB
Sample240331-y3mm3sbb5y
SHA256 2024bbff3cd2a2c3d8da9bec78c5ebecc03e27238364b58a8b4caeed35afad0a
MD5 5d21cfa58276888f704823db5791f990
SHA1 8558ef6a4c2276d98abad809cfae28c26435c24d
SHA512 d738ec769d7a5be357d548e187bf7e2040c8aa18b5a9c2ed0d599ab76dfdc1a616d93780ecee7bbbcac9a85351fb7986baecfc1fddf7ac5a3a93534293d21012
SSDEEP 49152:IeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeW:
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
3456	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\oyivkevh\ImagePath = "C:\\Windows\\SysWOW64\\oyivkevh\\zgsfobcw.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-1-5-21-566096764-1992588923-1249862864-1000\Control Panel\International\Geo\Nation	5d21cfa58276888f704823db5791f990_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
3872	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4136	zgsfobcw.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4136 set thread context of 3872	4136	zgsfobcw.exe	107

Launches sc.exe 3 IoCs

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

pid	Process
3284	sc.exe
5048	sc.exe
232	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
4540	1528	WerFault.exe	84
1504	4136	WerFault.exe	100

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1528 wrote to memory of 3812	1528	5d21cfa58276888f704823db5791f990_JaffaCakes118.exe	88
PID 1528 wrote to memory of 3812	1528	5d21cfa58276888f704823db5791f990_JaffaCakes118.exe	88
PID 1528 wrote to memory of 3812	1528	5d21cfa58276888f704823db5791f990_JaffaCakes118.exe	88
PID 1528 wrote to memory of 5000	1528	5d21cfa58276888f704823db5791f990_JaffaCakes118.exe	90
PID 1528 wrote to memory of 5000	1528	5d21cfa58276888f704823db5791f990_JaffaCakes118.exe	90
PID 1528 wrote to memory of 5000	1528	5d21cfa58276888f704823db5791f990_JaffaCakes118.exe	90
PID 1528 wrote to memory of 232	1528	5d21cfa58276888f704823db5791f990_JaffaCakes118.exe	92
PID 1528 wrote to memory of 232	1528	5d21cfa58276888f704823db5791f990_JaffaCakes118.exe	92
PID 1528 wrote to memory of 232	1528	5d21cfa58276888f704823db5791f990_JaffaCakes118.exe	92
PID 1528 wrote to memory of 3284	1528	5d21cfa58276888f704823db5791f990_JaffaCakes118.exe	94
PID 1528 wrote to memory of 3284	1528	5d21cfa58276888f704823db5791f990_JaffaCakes118.exe	94
PID 1528 wrote to memory of 3284	1528	5d21cfa58276888f704823db5791f990_JaffaCakes118.exe	94
PID 1528 wrote to memory of 5048	1528	5d21cfa58276888f704823db5791f990_JaffaCakes118.exe	98
PID 1528 wrote to memory of 5048	1528	5d21cfa58276888f704823db5791f990_JaffaCakes118.exe	98
PID 1528 wrote to memory of 5048	1528	5d21cfa58276888f704823db5791f990_JaffaCakes118.exe	98
PID 1528 wrote to memory of 3456	1528	5d21cfa58276888f704823db5791f990_JaffaCakes118.exe	101
PID 1528 wrote to memory of 3456	1528	5d21cfa58276888f704823db5791f990_JaffaCakes118.exe	101
PID 1528 wrote to memory of 3456	1528	5d21cfa58276888f704823db5791f990_JaffaCakes118.exe	101
PID 4136 wrote to memory of 3872	4136	zgsfobcw.exe	107
PID 4136 wrote to memory of 3872	4136	zgsfobcw.exe	107
PID 4136 wrote to memory of 3872	4136	zgsfobcw.exe	107
PID 4136 wrote to memory of 3872	4136	zgsfobcw.exe	107
PID 4136 wrote to memory of 3872	4136	zgsfobcw.exe	107

C:\Users\Admin\AppData\Local\Temp\5d21cfa58276888f704823db5791f990_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\5d21cfa58276888f704823db5791f990_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1528
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\oyivkevh\
  2⤵
  PID:3812
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\zgsfobcw.exe" C:\Windows\SysWOW64\oyivkevh\
  2⤵
  PID:5000
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create oyivkevh binPath= "C:\Windows\SysWOW64\oyivkevh\zgsfobcw.exe /d\"C:\Users\Admin\AppData\Local\Temp\5d21cfa58276888f704823db5791f990_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:232
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description oyivkevh "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:3284
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start oyivkevh
  2⤵
  - Launches sc.exe
  PID:5048
- 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:3456
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1528 -s 892
  2⤵
  - Program crash
  PID:4540

C:\Windows\SysWOW64\oyivkevh\zgsfobcw.exe
C:\Windows\SysWOW64\oyivkevh\zgsfobcw.exe /d"C:\Users\Admin\AppData\Local\Temp\5d21cfa58276888f704823db5791f990_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4136
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:3872
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4136 -s 520
  2⤵
  - Program crash
  PID:1504

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 1528 -ip 1528
1⤵
PID:1080

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 4136 -ip 4136
1⤵
PID:672

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

zgsfobcw.exe

Path C:\Users\Admin\AppData\Local\Temp\zgsfobcw.exe
Size 10.8MB
SHA256 ef653b4cca08cd0c2903c77ac17dd4ccae95e1973a48c47cf4b1ec1cf83268d3
MD5 d7a9689f733fe934d353a9d6e0011771
SHA1 31e7660c01835a6b4fb66939086556c492558395
SHA512 400fcfa629051d0f410410db938ac679b23b8eed4c7ac9762bc0cd439438ffb5fa4f338ecf77a01ede157598a63fb012bb637d771658be42eb791f2f996debfd
SSDEEP 49152:Geeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeb:
MD5 SHA1 SHA512 SSDEEP

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memory/1528-1-0x0000000000A00000-0x0000000000B00000-memory.dmp

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memory/1528-2-0x00000000009C0000-0x00000000009D3000-memory.dmp

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memory/1528-4-0x0000000000400000-0x000000000086B000-memory.dmp

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memory/1528-8-0x0000000000400000-0x000000000086B000-memory.dmp

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memory/1528-9-0x00000000009C0000-0x00000000009D3000-memory.dmp

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memory/3872-16-0x0000000000E60000-0x0000000000E75000-memory.dmp

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memory/3872-11-0x0000000000E60000-0x0000000000E75000-memory.dmp

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memory/3872-17-0x0000000000E60000-0x0000000000E75000-memory.dmp

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memory/3872-19-0x0000000000E60000-0x0000000000E75000-memory.dmp

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memory/4136-13-0x0000000000400000-0x000000000086B000-memory.dmp

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memory/4136-10-0x0000000000890000-0x0000000000990000-memory.dmp

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memory/4136-18-0x0000000000400000-0x000000000086B000-memory.dmp

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Analysis

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General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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