tofsee | 9147b2e4d0e04f288700b09606af79a3fdab6b6e8e69495a8ef868481d544beb

Analysis

max time kernel
146s
max time network
118s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
29/05/2024, 10:17

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General

Target
8066071ebc2261fb9fa7bc095950e7a4_JaffaCakes118.exe
Size 142KB
Sample240529-mbk5dsbc4x
SHA256 9147b2e4d0e04f288700b09606af79a3fdab6b6e8e69495a8ef868481d544beb
MD5 8066071ebc2261fb9fa7bc095950e7a4
SHA1 385ece42d14ed13dd1911bc78405448f2cc2c5d5
SHA512 3b6061ccbc73cc280412177f7569f0af13d14c75425998f043702d97ac33d880ca2d2a21f3fadfa46acb266e82b75d9e2f811122daab48e7dac080bc67fa1511
SSDEEP 3072:LO8/FLfg76rzTkYfiL2+jKfgi4m5nuGFU6W6WN06b37:B9pzwFLnKP46uC
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

tofsee evasion execution 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

Windows security bypass 2 TTPs 1 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\SysWOW64\knvguapd = "0"	svchost.exe

Creates new service(s) 2 TTPs
persistence execution

Windows Service
T1543.003

Service Execution
T1569.002

Modifies Windows Firewall 2 TTPs 1 IoCs

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
2440	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\knvguapd\ImagePath = "C:\\Windows\\SysWOW64\\knvguapd\\zyiztrgs.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2588	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2668	zyiztrgs.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2668 set thread context of 2588	2668	zyiztrgs.exe	41

Launches sc.exe 3 IoCs

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

pid	Process
2576	sc.exe
2144	sc.exe
2540	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 30 IoCs

description	pid	Process	procid_target
PID 2084 wrote to memory of 2856	2084	8066071ebc2261fb9fa7bc095950e7a4_JaffaCakes118.exe	28
PID 2084 wrote to memory of 2856	2084	8066071ebc2261fb9fa7bc095950e7a4_JaffaCakes118.exe	28
PID 2084 wrote to memory of 2856	2084	8066071ebc2261fb9fa7bc095950e7a4_JaffaCakes118.exe	28
PID 2084 wrote to memory of 2856	2084	8066071ebc2261fb9fa7bc095950e7a4_JaffaCakes118.exe	28
PID 2084 wrote to memory of 2968	2084	8066071ebc2261fb9fa7bc095950e7a4_JaffaCakes118.exe	30
PID 2084 wrote to memory of 2968	2084	8066071ebc2261fb9fa7bc095950e7a4_JaffaCakes118.exe	30
PID 2084 wrote to memory of 2968	2084	8066071ebc2261fb9fa7bc095950e7a4_JaffaCakes118.exe	30
PID 2084 wrote to memory of 2968	2084	8066071ebc2261fb9fa7bc095950e7a4_JaffaCakes118.exe	30
PID 2084 wrote to memory of 2144	2084	8066071ebc2261fb9fa7bc095950e7a4_JaffaCakes118.exe	32
PID 2084 wrote to memory of 2144	2084	8066071ebc2261fb9fa7bc095950e7a4_JaffaCakes118.exe	32
PID 2084 wrote to memory of 2144	2084	8066071ebc2261fb9fa7bc095950e7a4_JaffaCakes118.exe	32
PID 2084 wrote to memory of 2144	2084	8066071ebc2261fb9fa7bc095950e7a4_JaffaCakes118.exe	32
PID 2084 wrote to memory of 2540	2084	8066071ebc2261fb9fa7bc095950e7a4_JaffaCakes118.exe	34
PID 2084 wrote to memory of 2540	2084	8066071ebc2261fb9fa7bc095950e7a4_JaffaCakes118.exe	34
PID 2084 wrote to memory of 2540	2084	8066071ebc2261fb9fa7bc095950e7a4_JaffaCakes118.exe	34
PID 2084 wrote to memory of 2540	2084	8066071ebc2261fb9fa7bc095950e7a4_JaffaCakes118.exe	34
PID 2084 wrote to memory of 2576	2084	8066071ebc2261fb9fa7bc095950e7a4_JaffaCakes118.exe	36
PID 2084 wrote to memory of 2576	2084	8066071ebc2261fb9fa7bc095950e7a4_JaffaCakes118.exe	36
PID 2084 wrote to memory of 2576	2084	8066071ebc2261fb9fa7bc095950e7a4_JaffaCakes118.exe	36
PID 2084 wrote to memory of 2576	2084	8066071ebc2261fb9fa7bc095950e7a4_JaffaCakes118.exe	36
PID 2084 wrote to memory of 2440	2084	8066071ebc2261fb9fa7bc095950e7a4_JaffaCakes118.exe	39
PID 2084 wrote to memory of 2440	2084	8066071ebc2261fb9fa7bc095950e7a4_JaffaCakes118.exe	39
PID 2084 wrote to memory of 2440	2084	8066071ebc2261fb9fa7bc095950e7a4_JaffaCakes118.exe	39
PID 2084 wrote to memory of 2440	2084	8066071ebc2261fb9fa7bc095950e7a4_JaffaCakes118.exe	39
PID 2668 wrote to memory of 2588	2668	zyiztrgs.exe	41
PID 2668 wrote to memory of 2588	2668	zyiztrgs.exe	41
PID 2668 wrote to memory of 2588	2668	zyiztrgs.exe	41
PID 2668 wrote to memory of 2588	2668	zyiztrgs.exe	41
PID 2668 wrote to memory of 2588	2668	zyiztrgs.exe	41
PID 2668 wrote to memory of 2588	2668	zyiztrgs.exe	41

C:\Users\Admin\AppData\Local\Temp\8066071ebc2261fb9fa7bc095950e7a4_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\8066071ebc2261fb9fa7bc095950e7a4_JaffaCakes118.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2084
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\knvguapd\
  2⤵
  PID:2856
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\zyiztrgs.exe" C:\Windows\SysWOW64\knvguapd\
  2⤵
  PID:2968
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create knvguapd binPath= "C:\Windows\SysWOW64\knvguapd\zyiztrgs.exe /d\"C:\Users\Admin\AppData\Local\Temp\8066071ebc2261fb9fa7bc095950e7a4_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:2144
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description knvguapd "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:2540
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start knvguapd
  2⤵
  - Launches sc.exe
  PID:2576
- 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:2440

C:\Windows\SysWOW64\knvguapd\zyiztrgs.exe
C:\Windows\SysWOW64\knvguapd\zyiztrgs.exe /d"C:\Users\Admin\AppData\Local\Temp\8066071ebc2261fb9fa7bc095950e7a4_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2668
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Windows security bypass
  - Sets service image path in registry
  - Deletes itself
  PID:2588

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

T1569

Service Execution

T1569.002

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

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

zyiztrgs.exe

Path C:\Users\Admin\AppData\Local\Temp\zyiztrgs.exe
Size 15.0MB
SHA256 4ce92eb8b239e6831b98a41e900b843b8c13a2914f720fb0354f3414d313a172
MD5 df9b6bb553e8a612ae52e7d6c6b83200
SHA1 0bd4eea6abe726780ad35d6f49ebda9e49fd46eb
SHA512 2a78b1537814d8cc60a35941d5c1a88c8ef1a4e863b6e17768bb2e37e45e313ef9b7e3d7b2c3815b535fcfe7130909c023840cc2f373e924d896064a9653c9f8
SSDEEP 3072:wO8/FLfg76rzTkYfiL2+jKfgi4m5nuGFU6W6WN06b37////////////////////P:09pzwFLnKP46uC
MD5 SHA1 SHA512 SSDEEP

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memory/2084-0-0x0000000000400000-0x0000000000426000-memory.dmp

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memory/2084-1-0x0000000000260000-0x0000000000261000-memory.dmp

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memory/2084-2-0x0000000000270000-0x0000000000271000-memory.dmp

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memory/2084-6-0x0000000000400000-0x0000000000426000-memory.dmp

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memory/2588-8-0x0000000000080000-0x0000000000095000-memory.dmp

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memory/2588-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

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memory/2588-11-0x0000000000080000-0x0000000000095000-memory.dmp

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memory/2588-13-0x0000000000080000-0x0000000000095000-memory.dmp

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memory/2588-15-0x0000000000080000-0x0000000000095000-memory.dmp

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memory/2668-7-0x0000000000400000-0x0000000000426000-memory.dmp

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memory/2668-14-0x0000000000400000-0x0000000000426000-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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