tofsee | 2f89d2275e7708b9b39b3e554217c81fc9f1312f4a85790450843b28b10fe1b0

Analysis

max time kernel
173s
max time network
184s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
19/04/2024, 12:38

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General

Target
fa4fd90bf7c41e6e04a4eb88dabd22cb_JaffaCakes118.exe
Size 11.5MB
Sample240419-pvkn3sce89
SHA256 2f89d2275e7708b9b39b3e554217c81fc9f1312f4a85790450843b28b10fe1b0
MD5 fa4fd90bf7c41e6e04a4eb88dabd22cb
SHA1 0eb6d1e0b924dd203f0b8be3a54948a5cb2cb856
SHA512 18e7f39f472d1317500410a213af80a19ddbc29130cda482fc6ef26f7a4607089fc0a65dc551ba65b2b25dc4687a57ee5981fac9839c1715a9ce0259abec1fe1
SSDEEP 98304:svkoooooooooooooooooooooooooooooooooooooooooooooooooooooooooooow:
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
5024	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\kbydjlza\ImagePath = "C:\\Windows\\SysWOW64\\kbydjlza\\dycukvxv.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-1-5-21-3198953144-1466794930-246379610-1000\Control Panel\International\Geo\Nation	fa4fd90bf7c41e6e04a4eb88dabd22cb_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
868	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3728	dycukvxv.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3728 set thread context of 868	3728	dycukvxv.exe	107

Launches sc.exe 3 IoCs

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

pid	Process
4284	sc.exe
2092	sc.exe
920	sc.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 4 IoCs

pid	pid_target	Process	procid_target
5112	3780	WerFault.exe	84
1804	3780	WerFault.exe	84
4972	3728	WerFault.exe	103
3000	3728	WerFault.exe	103

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3780 wrote to memory of 2344	3780	fa4fd90bf7c41e6e04a4eb88dabd22cb_JaffaCakes118.exe	90
PID 3780 wrote to memory of 2344	3780	fa4fd90bf7c41e6e04a4eb88dabd22cb_JaffaCakes118.exe	90
PID 3780 wrote to memory of 2344	3780	fa4fd90bf7c41e6e04a4eb88dabd22cb_JaffaCakes118.exe	90
PID 3780 wrote to memory of 3436	3780	fa4fd90bf7c41e6e04a4eb88dabd22cb_JaffaCakes118.exe	92
PID 3780 wrote to memory of 3436	3780	fa4fd90bf7c41e6e04a4eb88dabd22cb_JaffaCakes118.exe	92
PID 3780 wrote to memory of 3436	3780	fa4fd90bf7c41e6e04a4eb88dabd22cb_JaffaCakes118.exe	92
PID 3780 wrote to memory of 4284	3780	fa4fd90bf7c41e6e04a4eb88dabd22cb_JaffaCakes118.exe	94
PID 3780 wrote to memory of 4284	3780	fa4fd90bf7c41e6e04a4eb88dabd22cb_JaffaCakes118.exe	94
PID 3780 wrote to memory of 4284	3780	fa4fd90bf7c41e6e04a4eb88dabd22cb_JaffaCakes118.exe	94
PID 3780 wrote to memory of 2092	3780	fa4fd90bf7c41e6e04a4eb88dabd22cb_JaffaCakes118.exe	96
PID 3780 wrote to memory of 2092	3780	fa4fd90bf7c41e6e04a4eb88dabd22cb_JaffaCakes118.exe	96
PID 3780 wrote to memory of 2092	3780	fa4fd90bf7c41e6e04a4eb88dabd22cb_JaffaCakes118.exe	96
PID 3780 wrote to memory of 920	3780	fa4fd90bf7c41e6e04a4eb88dabd22cb_JaffaCakes118.exe	98
PID 3780 wrote to memory of 920	3780	fa4fd90bf7c41e6e04a4eb88dabd22cb_JaffaCakes118.exe	98
PID 3780 wrote to memory of 920	3780	fa4fd90bf7c41e6e04a4eb88dabd22cb_JaffaCakes118.exe	98
PID 3780 wrote to memory of 5024	3780	fa4fd90bf7c41e6e04a4eb88dabd22cb_JaffaCakes118.exe	100
PID 3780 wrote to memory of 5024	3780	fa4fd90bf7c41e6e04a4eb88dabd22cb_JaffaCakes118.exe	100
PID 3780 wrote to memory of 5024	3780	fa4fd90bf7c41e6e04a4eb88dabd22cb_JaffaCakes118.exe	100
PID 3728 wrote to memory of 868	3728	dycukvxv.exe	107
PID 3728 wrote to memory of 868	3728	dycukvxv.exe	107
PID 3728 wrote to memory of 868	3728	dycukvxv.exe	107
PID 3728 wrote to memory of 868	3728	dycukvxv.exe	107
PID 3728 wrote to memory of 868	3728	dycukvxv.exe	107

C:\Users\Admin\AppData\Local\Temp\fa4fd90bf7c41e6e04a4eb88dabd22cb_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\fa4fd90bf7c41e6e04a4eb88dabd22cb_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3780
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\kbydjlza\
  2⤵
  PID:2344
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\dycukvxv.exe" C:\Windows\SysWOW64\kbydjlza\
  2⤵
  PID:3436
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create kbydjlza binPath= "C:\Windows\SysWOW64\kbydjlza\dycukvxv.exe /d\"C:\Users\Admin\AppData\Local\Temp\fa4fd90bf7c41e6e04a4eb88dabd22cb_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:4284
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description kbydjlza "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:2092
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start kbydjlza
  2⤵
  - Launches sc.exe
  PID:920
- 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:5024
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3780 -s 1156
  2⤵
  - Program crash
  PID:5112
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3780 -s 1044
  2⤵
  - Program crash
  PID:1804

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 3780 -ip 3780
1⤵
PID:1700

C:\Windows\SysWOW64\kbydjlza\dycukvxv.exe
C:\Windows\SysWOW64\kbydjlza\dycukvxv.exe /d"C:\Users\Admin\AppData\Local\Temp\fa4fd90bf7c41e6e04a4eb88dabd22cb_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3728
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:868
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3728 -s 540
  2⤵
  - Program crash
  PID:4972
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3728 -s 520
  2⤵
  - Program crash
  PID:3000

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 472 -p 3780 -ip 3780
1⤵
PID:4148

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 504 -p 3728 -ip 3728
1⤵
PID:2704

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3728 -ip 3728
1⤵
PID:244

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

dycukvxv.exe

Path C:\Users\Admin\AppData\Local\Temp\dycukvxv.exe
Size 14.2MB
SHA256 c5061d047c67d9e7c6ab00d1876e6f8c19d6e4683ab9bfd6c09618af1b590282
MD5 a7a1ee7ef88ff2165639312d77513a59
SHA1 b7aec8245a5b5459ee25d7dc9b8ab0c26d153e94
SHA512 d437955e770ec279227bc3eb00c42d8caaa07e4f13cd99a54d7492b168764fade00b0ffef5ea8f0494a9920994330793ab1fd997d088d6121783289e190ebf3c
SSDEEP 98304:Ivkoooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo4:
MD5 SHA1 SHA512 SSDEEP

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memory/868-18-0x0000000001270000-0x0000000001285000-memory.dmp

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memory/868-10-0x0000000001270000-0x0000000001285000-memory.dmp

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memory/868-19-0x0000000001270000-0x0000000001285000-memory.dmp

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memory/868-21-0x0000000001270000-0x0000000001285000-memory.dmp

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memory/868-22-0x0000000001270000-0x0000000001285000-memory.dmp

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memory/3728-11-0x00000000030C0000-0x00000000031C0000-memory.dmp

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memory/3728-13-0x0000000002FE0000-0x0000000002FF3000-memory.dmp

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memory/3728-16-0x0000000000400000-0x0000000002FA6000-memory.dmp

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memory/3728-20-0x0000000000400000-0x0000000002FA6000-memory.dmp

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memory/3780-4-0x0000000000400000-0x0000000002FA6000-memory.dmp

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memory/3780-2-0x0000000003130000-0x0000000003143000-memory.dmp

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memory/3780-8-0x0000000000400000-0x0000000002FA6000-memory.dmp

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memory/3780-1-0x0000000003300000-0x0000000003400000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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