tofsee | 49911d61a324bcfb2722acc8f21c54e093fed68c99989b26bd031298bb84f4b7

Analysis

max time kernel
143s
max time network
125s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
20/04/2024, 02:33

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General

Target
fbbc300be6ec59b88fe78c250e98f0f4_JaffaCakes118.exe
Size 14.6MB
Sample240420-c2cktsfb2s
SHA256 49911d61a324bcfb2722acc8f21c54e093fed68c99989b26bd031298bb84f4b7
MD5 fbbc300be6ec59b88fe78c250e98f0f4
SHA1 e59eae7c8050cc027aad2f6801808ec899527cf5
SHA512 25f9a3f6fe4a1c7b852c8a9adee66c5a762c0021aa73b6d1bcefb9a811efbc558573955877b4c831ca6204fb3235a724a0dcd6234f8bb82db2a04b59edeb6929
SSDEEP 49152:Sj5555555555555555555555555555555555555555555555555555555555555F:
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

43.231.4.7
lazystax.ru

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
1780	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\ejzjqpw\ImagePath = "C:\\Windows\\SysWOW64\\ejzjqpw\\auwtnjty.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-1-5-21-4084619521-2220719027-1909462854-1000\Control Panel\International\Geo\Nation	fbbc300be6ec59b88fe78c250e98f0f4_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
2596	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3448	auwtnjty.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3448 set thread context of 2596	3448	auwtnjty.exe	99

Launches sc.exe 3 IoCs

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

pid	Process
4440	sc.exe
1120	sc.exe
2772	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 23 IoCs

description	pid	Process	procid_target
PID 2956 wrote to memory of 2980	2956	fbbc300be6ec59b88fe78c250e98f0f4_JaffaCakes118.exe	87
PID 2956 wrote to memory of 2980	2956	fbbc300be6ec59b88fe78c250e98f0f4_JaffaCakes118.exe	87
PID 2956 wrote to memory of 2980	2956	fbbc300be6ec59b88fe78c250e98f0f4_JaffaCakes118.exe	87
PID 2956 wrote to memory of 1624	2956	fbbc300be6ec59b88fe78c250e98f0f4_JaffaCakes118.exe	90
PID 2956 wrote to memory of 1624	2956	fbbc300be6ec59b88fe78c250e98f0f4_JaffaCakes118.exe	90
PID 2956 wrote to memory of 1624	2956	fbbc300be6ec59b88fe78c250e98f0f4_JaffaCakes118.exe	90
PID 2956 wrote to memory of 4440	2956	fbbc300be6ec59b88fe78c250e98f0f4_JaffaCakes118.exe	92
PID 2956 wrote to memory of 4440	2956	fbbc300be6ec59b88fe78c250e98f0f4_JaffaCakes118.exe	92
PID 2956 wrote to memory of 4440	2956	fbbc300be6ec59b88fe78c250e98f0f4_JaffaCakes118.exe	92
PID 2956 wrote to memory of 1120	2956	fbbc300be6ec59b88fe78c250e98f0f4_JaffaCakes118.exe	94
PID 2956 wrote to memory of 1120	2956	fbbc300be6ec59b88fe78c250e98f0f4_JaffaCakes118.exe	94
PID 2956 wrote to memory of 1120	2956	fbbc300be6ec59b88fe78c250e98f0f4_JaffaCakes118.exe	94
PID 2956 wrote to memory of 2772	2956	fbbc300be6ec59b88fe78c250e98f0f4_JaffaCakes118.exe	96
PID 2956 wrote to memory of 2772	2956	fbbc300be6ec59b88fe78c250e98f0f4_JaffaCakes118.exe	96
PID 2956 wrote to memory of 2772	2956	fbbc300be6ec59b88fe78c250e98f0f4_JaffaCakes118.exe	96
PID 3448 wrote to memory of 2596	3448	auwtnjty.exe	99
PID 3448 wrote to memory of 2596	3448	auwtnjty.exe	99
PID 3448 wrote to memory of 2596	3448	auwtnjty.exe	99
PID 3448 wrote to memory of 2596	3448	auwtnjty.exe	99
PID 3448 wrote to memory of 2596	3448	auwtnjty.exe	99
PID 2956 wrote to memory of 1780	2956	fbbc300be6ec59b88fe78c250e98f0f4_JaffaCakes118.exe	100
PID 2956 wrote to memory of 1780	2956	fbbc300be6ec59b88fe78c250e98f0f4_JaffaCakes118.exe	100
PID 2956 wrote to memory of 1780	2956	fbbc300be6ec59b88fe78c250e98f0f4_JaffaCakes118.exe	100

C:\Users\Admin\AppData\Local\Temp\fbbc300be6ec59b88fe78c250e98f0f4_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\fbbc300be6ec59b88fe78c250e98f0f4_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2956
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ejzjqpw\
  2⤵
  PID:2980
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\auwtnjty.exe" C:\Windows\SysWOW64\ejzjqpw\
  2⤵
  PID:1624
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create ejzjqpw binPath= "C:\Windows\SysWOW64\ejzjqpw\auwtnjty.exe /d\"C:\Users\Admin\AppData\Local\Temp\fbbc300be6ec59b88fe78c250e98f0f4_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:4440
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description ejzjqpw "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:1120
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start ejzjqpw
  2⤵
  - Launches sc.exe
  PID:2772
- 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:1780

C:\Windows\SysWOW64\ejzjqpw\auwtnjty.exe
C:\Windows\SysWOW64\ejzjqpw\auwtnjty.exe /d"C:\Users\Admin\AppData\Local\Temp\fbbc300be6ec59b88fe78c250e98f0f4_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3448
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:2596

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

auwtnjty.exe

Path C:\Users\Admin\AppData\Local\Temp\auwtnjty.exe
Size 10.6MB
SHA256 2bc65231c69571c34e50f048eb8cbc11be13f56da002d4b9528e1f216c6d7695
MD5 6ec93042f6cf97f22cdad3423c72c699
SHA1 6d23b0a1ec625c7f0fae994ca432052df6a2ac97
SHA512 a586156ac7d4f88b1f854f18b1eaa228cabebbab72b3188e172797c0beff7b0a7ecdc9c22028e30c7a7e41c1b54361605aed4ca1822b509f85005e17ce36c1da
SSDEEP 49152:Wj55555555555555555555555555555555555555555555555555555555555555:
MD5 SHA1 SHA512 SSDEEP

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memory/2596-10-0x0000000000C20000-0x0000000000C35000-memory.dmp

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memory/2596-18-0x0000000000C20000-0x0000000000C35000-memory.dmp

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memory/2596-17-0x0000000000C20000-0x0000000000C35000-memory.dmp

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memory/2596-16-0x0000000000C20000-0x0000000000C35000-memory.dmp

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memory/2596-14-0x0000000000C20000-0x0000000000C35000-memory.dmp

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memory/2956-3-0x00000000006D0000-0x00000000006D1000-memory.dmp

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memory/2956-15-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/2956-0-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/2956-1-0x00000000005B0000-0x00000000005B1000-memory.dmp

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memory/2956-2-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/3448-9-0x0000000000CE0000-0x0000000000CE1000-memory.dmp

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memory/3448-12-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/3448-7-0x0000000000400000-0x000000000041E000-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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