tofsee | 6376859ba38701f4b0cf9fb970867d7e8b4712916181b26c72273e223b12d0a0

Analysis

max time kernel
150s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
21/04/2024, 11:09

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General

Target
ff25472606e2de2bd621b467a6f969a2_JaffaCakes118.exe
Size 13.4MB
Sample240421-m85kashd82
SHA256 6376859ba38701f4b0cf9fb970867d7e8b4712916181b26c72273e223b12d0a0
MD5 ff25472606e2de2bd621b467a6f969a2
SHA1 c027a885b1dedebab96f8cfac9facbf5ae2cf14c
SHA512 98bb3fb60883d7c48f6ee328bb3cb59e7509b1baec769912bd63243cccccd573f4ca64aa137af01c602deeaca2f3f91fc03142cfcef06fe619323bbe0dbebb2d
SSDEEP 49152:AckGb2222222222222222222222222222222222222222222222222222222222n:Ack
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
2584	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\qukrmpvm\ImagePath = "C:\\Windows\\SysWOW64\\qukrmpvm\\gcuurgft.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-1-5-21-2288054676-1871194608-3559553667-1000\Control Panel\International\Geo\Nation	ff25472606e2de2bd621b467a6f969a2_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
1788	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3312	gcuurgft.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3312 set thread context of 1788	3312	gcuurgft.exe	104

Launches sc.exe 3 IoCs

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

pid	Process
3316	sc.exe
3440	sc.exe
4880	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
4352	2508	WerFault.exe	84
3952	3312	WerFault.exe	99

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2508 wrote to memory of 3836	2508	ff25472606e2de2bd621b467a6f969a2_JaffaCakes118.exe	88
PID 2508 wrote to memory of 3836	2508	ff25472606e2de2bd621b467a6f969a2_JaffaCakes118.exe	88
PID 2508 wrote to memory of 3836	2508	ff25472606e2de2bd621b467a6f969a2_JaffaCakes118.exe	88
PID 2508 wrote to memory of 5036	2508	ff25472606e2de2bd621b467a6f969a2_JaffaCakes118.exe	90
PID 2508 wrote to memory of 5036	2508	ff25472606e2de2bd621b467a6f969a2_JaffaCakes118.exe	90
PID 2508 wrote to memory of 5036	2508	ff25472606e2de2bd621b467a6f969a2_JaffaCakes118.exe	90
PID 2508 wrote to memory of 3440	2508	ff25472606e2de2bd621b467a6f969a2_JaffaCakes118.exe	92
PID 2508 wrote to memory of 3440	2508	ff25472606e2de2bd621b467a6f969a2_JaffaCakes118.exe	92
PID 2508 wrote to memory of 3440	2508	ff25472606e2de2bd621b467a6f969a2_JaffaCakes118.exe	92
PID 2508 wrote to memory of 4880	2508	ff25472606e2de2bd621b467a6f969a2_JaffaCakes118.exe	95
PID 2508 wrote to memory of 4880	2508	ff25472606e2de2bd621b467a6f969a2_JaffaCakes118.exe	95
PID 2508 wrote to memory of 4880	2508	ff25472606e2de2bd621b467a6f969a2_JaffaCakes118.exe	95
PID 2508 wrote to memory of 3316	2508	ff25472606e2de2bd621b467a6f969a2_JaffaCakes118.exe	97
PID 2508 wrote to memory of 3316	2508	ff25472606e2de2bd621b467a6f969a2_JaffaCakes118.exe	97
PID 2508 wrote to memory of 3316	2508	ff25472606e2de2bd621b467a6f969a2_JaffaCakes118.exe	97
PID 2508 wrote to memory of 2584	2508	ff25472606e2de2bd621b467a6f969a2_JaffaCakes118.exe	100
PID 2508 wrote to memory of 2584	2508	ff25472606e2de2bd621b467a6f969a2_JaffaCakes118.exe	100
PID 2508 wrote to memory of 2584	2508	ff25472606e2de2bd621b467a6f969a2_JaffaCakes118.exe	100
PID 3312 wrote to memory of 1788	3312	gcuurgft.exe	104
PID 3312 wrote to memory of 1788	3312	gcuurgft.exe	104
PID 3312 wrote to memory of 1788	3312	gcuurgft.exe	104
PID 3312 wrote to memory of 1788	3312	gcuurgft.exe	104
PID 3312 wrote to memory of 1788	3312	gcuurgft.exe	104

C:\Users\Admin\AppData\Local\Temp\ff25472606e2de2bd621b467a6f969a2_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\ff25472606e2de2bd621b467a6f969a2_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\qukrmpvm\
  2⤵
  PID:3836
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\gcuurgft.exe" C:\Windows\SysWOW64\qukrmpvm\
  2⤵
  PID:5036
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create qukrmpvm binPath= "C:\Windows\SysWOW64\qukrmpvm\gcuurgft.exe /d\"C:\Users\Admin\AppData\Local\Temp\ff25472606e2de2bd621b467a6f969a2_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:3440
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description qukrmpvm "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:4880
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start qukrmpvm
  2⤵
  - Launches sc.exe
  PID:3316
- 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:2584
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2508 -s 776
  2⤵
  - Program crash
  PID:4352

C:\Windows\SysWOW64\qukrmpvm\gcuurgft.exe
C:\Windows\SysWOW64\qukrmpvm\gcuurgft.exe /d"C:\Users\Admin\AppData\Local\Temp\ff25472606e2de2bd621b467a6f969a2_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3312
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:1788
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3312 -s 516
  2⤵
  - Program crash
  PID:3952

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 2508 -ip 2508
1⤵
PID:1080

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 488 -p 3312 -ip 3312
1⤵
PID:2856

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

gcuurgft.exe

Path C:\Users\Admin\AppData\Local\Temp\gcuurgft.exe
Size 10.3MB
SHA256 1bdf3e98fd70fd4cf0e4905753480d74d8fa812e138ddb6cf07547bb73a2b18a
MD5 c14e8d96bfb5355c5099dcba88c091e1
SHA1 6995b44a33fd83ca64d33cd7f19ce370ccfa0239
SHA512 8e84037d8efe91a24080c3cd0dd791c0c50499858813b9436ac1762a9fa0366825a15c4854d1e276e96f3a455cc18c11bba3b101e52d5e0a74358d5f8d0b9b87
SSDEEP 49152:BckGb2222222222222222222222222222222222222222222222222222222222v:Bck
MD5 SHA1 SHA512 SSDEEP

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memory/1788-10-0x00000000004C0000-0x00000000004D5000-memory.dmp

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memory/1788-13-0x00000000004C0000-0x00000000004D5000-memory.dmp

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memory/1788-17-0x00000000004C0000-0x00000000004D5000-memory.dmp

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memory/1788-18-0x00000000004C0000-0x00000000004D5000-memory.dmp

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memory/1788-19-0x00000000004C0000-0x00000000004D5000-memory.dmp

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memory/2508-3-0x0000000000400000-0x0000000000472000-memory.dmp

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memory/2508-2-0x00000000001C0000-0x00000000001D3000-memory.dmp

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memory/2508-1-0x0000000000770000-0x0000000000870000-memory.dmp

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memory/2508-16-0x0000000000400000-0x0000000000472000-memory.dmp

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memory/3312-8-0x00000000004D0000-0x00000000005D0000-memory.dmp

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memory/3312-9-0x0000000000400000-0x0000000000472000-memory.dmp

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memory/3312-14-0x0000000000400000-0x0000000000472000-memory.dmp

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memory/3312-15-0x00000000001C0000-0x00000000001D3000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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