tofsee | e22cebdc511361af6279b3d257d5ca3c69fdd3b799f193fe3fdd8f9eeb303573

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
31/03/2024, 14:31

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General

Target
57093deb4af9d588900f67fc2e2d677e_JaffaCakes118.exe
Size 12.1MB
Sample240331-rvwgpaea87
SHA256 e22cebdc511361af6279b3d257d5ca3c69fdd3b799f193fe3fdd8f9eeb303573
MD5 57093deb4af9d588900f67fc2e2d677e
SHA1 a83d4ced5a0d5fa7e4f1748bd1f8a9c9105bcdac
SHA512 da85cff41991841286401dcac9341db0740304c6d4421b5246160a1075b084c305f0069b05fd5e2dd85952de0382118857bad2fe473c95c4553761f7c504756d
SSDEEP 6144:/uumRZNKfLWUAUx6z6z1PiK/GasVhMz/bY:GbUR6z6zHGasVhU
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

quadoil.ru
lakeflex.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
1744	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\lzqdosyb\ImagePath = "C:\\Windows\\SysWOW64\\lzqdosyb\\tuscfydo.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-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation	57093deb4af9d588900f67fc2e2d677e_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
2296	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3504	tuscfydo.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3504 set thread context of 2296	3504	tuscfydo.exe	101

Launches sc.exe 3 IoCs

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

pid	Process
1300	sc.exe
1640	sc.exe
2180	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
5096	1384	WerFault.exe	84
2772	3504	WerFault.exe	95

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1384 wrote to memory of 4460	1384	57093deb4af9d588900f67fc2e2d677e_JaffaCakes118.exe	85
PID 1384 wrote to memory of 4460	1384	57093deb4af9d588900f67fc2e2d677e_JaffaCakes118.exe	85
PID 1384 wrote to memory of 4460	1384	57093deb4af9d588900f67fc2e2d677e_JaffaCakes118.exe	85
PID 1384 wrote to memory of 4756	1384	57093deb4af9d588900f67fc2e2d677e_JaffaCakes118.exe	87
PID 1384 wrote to memory of 4756	1384	57093deb4af9d588900f67fc2e2d677e_JaffaCakes118.exe	87
PID 1384 wrote to memory of 4756	1384	57093deb4af9d588900f67fc2e2d677e_JaffaCakes118.exe	87
PID 1384 wrote to memory of 2180	1384	57093deb4af9d588900f67fc2e2d677e_JaffaCakes118.exe	89
PID 1384 wrote to memory of 2180	1384	57093deb4af9d588900f67fc2e2d677e_JaffaCakes118.exe	89
PID 1384 wrote to memory of 2180	1384	57093deb4af9d588900f67fc2e2d677e_JaffaCakes118.exe	89
PID 1384 wrote to memory of 1300	1384	57093deb4af9d588900f67fc2e2d677e_JaffaCakes118.exe	91
PID 1384 wrote to memory of 1300	1384	57093deb4af9d588900f67fc2e2d677e_JaffaCakes118.exe	91
PID 1384 wrote to memory of 1300	1384	57093deb4af9d588900f67fc2e2d677e_JaffaCakes118.exe	91
PID 1384 wrote to memory of 1640	1384	57093deb4af9d588900f67fc2e2d677e_JaffaCakes118.exe	93
PID 1384 wrote to memory of 1640	1384	57093deb4af9d588900f67fc2e2d677e_JaffaCakes118.exe	93
PID 1384 wrote to memory of 1640	1384	57093deb4af9d588900f67fc2e2d677e_JaffaCakes118.exe	93
PID 1384 wrote to memory of 1744	1384	57093deb4af9d588900f67fc2e2d677e_JaffaCakes118.exe	96
PID 1384 wrote to memory of 1744	1384	57093deb4af9d588900f67fc2e2d677e_JaffaCakes118.exe	96
PID 1384 wrote to memory of 1744	1384	57093deb4af9d588900f67fc2e2d677e_JaffaCakes118.exe	96
PID 3504 wrote to memory of 2296	3504	tuscfydo.exe	101
PID 3504 wrote to memory of 2296	3504	tuscfydo.exe	101
PID 3504 wrote to memory of 2296	3504	tuscfydo.exe	101
PID 3504 wrote to memory of 2296	3504	tuscfydo.exe	101
PID 3504 wrote to memory of 2296	3504	tuscfydo.exe	101

C:\Users\Admin\AppData\Local\Temp\57093deb4af9d588900f67fc2e2d677e_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\57093deb4af9d588900f67fc2e2d677e_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1384
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\lzqdosyb\
  2⤵
  PID:4460
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\tuscfydo.exe" C:\Windows\SysWOW64\lzqdosyb\
  2⤵
  PID:4756
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create lzqdosyb binPath= "C:\Windows\SysWOW64\lzqdosyb\tuscfydo.exe /d\"C:\Users\Admin\AppData\Local\Temp\57093deb4af9d588900f67fc2e2d677e_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:2180
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description lzqdosyb "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:1300
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start lzqdosyb
  2⤵
  - Launches sc.exe
  PID:1640
- 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:1744
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1384 -s 1284
  2⤵
  - Program crash
  PID:5096

C:\Windows\SysWOW64\lzqdosyb\tuscfydo.exe
C:\Windows\SysWOW64\lzqdosyb\tuscfydo.exe /d"C:\Users\Admin\AppData\Local\Temp\57093deb4af9d588900f67fc2e2d677e_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3504
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:2296
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3504 -s 512
  2⤵
  - Program crash
  PID:2772

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 1384 -ip 1384
1⤵
PID:4760

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 3504 -ip 3504
1⤵
PID:4880

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

tuscfydo.exe

Path C:\Users\Admin\AppData\Local\Temp\tuscfydo.exe
Size 13.6MB
SHA256 530798b0412d37c6a3f40b431975ab2e48caba892fd89f8f7569e07b943f3466
MD5 f94118fc3e612a298bff6e8035e6abc9
SHA1 161c1167bc7691d2e24fe2a6ef6884e396f01f88
SHA512 11feb9333423aa6c86b174234c55bb15df3cb825b4480d1967361026b06380110f95d6a008f15654fd2a1c9a65c95d0933a29240e76b75b623fe333d37fae1f8
SSDEEP 6144:BuumRZNKfLWUAUx6z6z1PiK/GasVhMz/bY:YbUR6z6zHGasVhU
MD5 SHA1 SHA512 SSDEEP

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memory/1384-1-0x0000000001900000-0x0000000001A00000-memory.dmp

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memory/1384-2-0x0000000003400000-0x0000000003413000-memory.dmp

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memory/1384-4-0x0000000000400000-0x00000000016BD000-memory.dmp

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memory/1384-8-0x0000000000400000-0x00000000016BD000-memory.dmp

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memory/1384-9-0x0000000003400000-0x0000000003413000-memory.dmp

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memory/2296-15-0x0000000000530000-0x0000000000545000-memory.dmp

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memory/2296-11-0x0000000000530000-0x0000000000545000-memory.dmp

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memory/2296-16-0x0000000000530000-0x0000000000545000-memory.dmp

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memory/2296-18-0x0000000000530000-0x0000000000545000-memory.dmp

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memory/2296-19-0x0000000000530000-0x0000000000545000-memory.dmp

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memory/3504-13-0x0000000000400000-0x00000000016BD000-memory.dmp

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memory/3504-10-0x0000000001880000-0x0000000001980000-memory.dmp

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memory/3504-17-0x0000000000400000-0x00000000016BD000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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