tofsee | cc405e27cf3c45f22534764ed6c2c3d7dc46264b4c275cfc53b3cf6707c211a5

Analysis

max time kernel
149s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
18/04/2024, 06:37

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General

Target
f777ab88e7988a6197689c84bd5c200b_JaffaCakes118.exe
Size 10.1MB
Sample240418-hdggrsdf87
SHA256 cc405e27cf3c45f22534764ed6c2c3d7dc46264b4c275cfc53b3cf6707c211a5
MD5 f777ab88e7988a6197689c84bd5c200b
SHA1 9b8f94fe18fcfcbbb6ca1736751d6ca5ee417766
SHA512 9e9730d5ee6629003f29dcd9193ccd09acfa52256439a8408019273fd12b5c87138de4459d659c63a7eb505cc81039a50767ca33adf687a389a40aeb6ba64436
SSDEEP 12288:Iz+wSUpBMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMs:Iz8
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
3996	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\yfldoquq\ImagePath = "C:\\Windows\\SysWOW64\\yfldoquq\\vewvequl.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-1-5-21-4092317236-2027488869-1227795436-1000\Control Panel\International\Geo\Nation	f777ab88e7988a6197689c84bd5c200b_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
3992	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4924	vewvequl.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4924 set thread context of 3992	4924	vewvequl.exe	101

Launches sc.exe 3 IoCs

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

pid	Process
4896	sc.exe
1812	sc.exe
4768	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 4808 wrote to memory of 2128	4808	f777ab88e7988a6197689c84bd5c200b_JaffaCakes118.exe	86
PID 4808 wrote to memory of 2128	4808	f777ab88e7988a6197689c84bd5c200b_JaffaCakes118.exe	86
PID 4808 wrote to memory of 2128	4808	f777ab88e7988a6197689c84bd5c200b_JaffaCakes118.exe	86
PID 4808 wrote to memory of 4560	4808	f777ab88e7988a6197689c84bd5c200b_JaffaCakes118.exe	89
PID 4808 wrote to memory of 4560	4808	f777ab88e7988a6197689c84bd5c200b_JaffaCakes118.exe	89
PID 4808 wrote to memory of 4560	4808	f777ab88e7988a6197689c84bd5c200b_JaffaCakes118.exe	89
PID 4808 wrote to memory of 1812	4808	f777ab88e7988a6197689c84bd5c200b_JaffaCakes118.exe	91
PID 4808 wrote to memory of 1812	4808	f777ab88e7988a6197689c84bd5c200b_JaffaCakes118.exe	91
PID 4808 wrote to memory of 1812	4808	f777ab88e7988a6197689c84bd5c200b_JaffaCakes118.exe	91
PID 4808 wrote to memory of 4768	4808	f777ab88e7988a6197689c84bd5c200b_JaffaCakes118.exe	94
PID 4808 wrote to memory of 4768	4808	f777ab88e7988a6197689c84bd5c200b_JaffaCakes118.exe	94
PID 4808 wrote to memory of 4768	4808	f777ab88e7988a6197689c84bd5c200b_JaffaCakes118.exe	94
PID 4808 wrote to memory of 4896	4808	f777ab88e7988a6197689c84bd5c200b_JaffaCakes118.exe	96
PID 4808 wrote to memory of 4896	4808	f777ab88e7988a6197689c84bd5c200b_JaffaCakes118.exe	96
PID 4808 wrote to memory of 4896	4808	f777ab88e7988a6197689c84bd5c200b_JaffaCakes118.exe	96
PID 4808 wrote to memory of 3996	4808	f777ab88e7988a6197689c84bd5c200b_JaffaCakes118.exe	98
PID 4808 wrote to memory of 3996	4808	f777ab88e7988a6197689c84bd5c200b_JaffaCakes118.exe	98
PID 4808 wrote to memory of 3996	4808	f777ab88e7988a6197689c84bd5c200b_JaffaCakes118.exe	98
PID 4924 wrote to memory of 3992	4924	vewvequl.exe	101
PID 4924 wrote to memory of 3992	4924	vewvequl.exe	101
PID 4924 wrote to memory of 3992	4924	vewvequl.exe	101
PID 4924 wrote to memory of 3992	4924	vewvequl.exe	101
PID 4924 wrote to memory of 3992	4924	vewvequl.exe	101

C:\Users\Admin\AppData\Local\Temp\f777ab88e7988a6197689c84bd5c200b_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f777ab88e7988a6197689c84bd5c200b_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4808
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\yfldoquq\
  2⤵
  PID:2128
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vewvequl.exe" C:\Windows\SysWOW64\yfldoquq\
  2⤵
  PID:4560
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create yfldoquq binPath= "C:\Windows\SysWOW64\yfldoquq\vewvequl.exe /d\"C:\Users\Admin\AppData\Local\Temp\f777ab88e7988a6197689c84bd5c200b_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:1812
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description yfldoquq "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:4768
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start yfldoquq
  2⤵
  - Launches sc.exe
  PID:4896
- 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:3996

C:\Windows\SysWOW64\yfldoquq\vewvequl.exe
C:\Windows\SysWOW64\yfldoquq\vewvequl.exe /d"C:\Users\Admin\AppData\Local\Temp\f777ab88e7988a6197689c84bd5c200b_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4924
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:3992

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

vewvequl.exe

Path C:\Users\Admin\AppData\Local\Temp\vewvequl.exe
Size 14.9MB
SHA256 174c1117161ed764af6666350fdcea90f0eaa6a381387192a3d8a992d9babf2b
MD5 86ccea191b283ba1923980c40b24e3d8
SHA1 9515dc33eab7c7c95c0310b6d692dc4726ce3eb8
SHA512 e84b9b033ba1fc1a5e686f62f4dda0140f9c6d460ebe287082feea120aaca916cd82a85676524f01c7f9d31e37185bbecf48886c206ba7e8db30d3d8c5e4cb65
SSDEEP 12288:Xz+wSUpBMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMv:Xz8
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/3992-11-0x0000000000E20000-0x0000000000E35000-memory.dmp

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memory/3992-18-0x0000000000E20000-0x0000000000E35000-memory.dmp

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memory/3992-17-0x0000000000E20000-0x0000000000E35000-memory.dmp

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memory/3992-16-0x0000000000E20000-0x0000000000E35000-memory.dmp

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memory/4808-3-0x00000000005E0000-0x00000000005E1000-memory.dmp

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memory/4808-7-0x000000005F000000-0x000000005F011000-memory.dmp

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memory/4808-6-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/4808-0-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/4808-1-0x00000000005D0000-0x00000000005D1000-memory.dmp

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memory/4808-2-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/4924-9-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/4924-10-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/4924-12-0x0000000000400000-0x000000000041E000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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