tofsee | 70e10e0e9a41b2a5eabc89163aaa2c749dac597f380e01f92e6e08090008a57e

Analysis

max time kernel
149s
max time network
153s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
31/03/2024, 16:52

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General

Target
58c96cac97ebd822ad7be1274d5bccb1_JaffaCakes118.exe
Size 13.5MB
Sample240331-vdcj2afc31
SHA256 70e10e0e9a41b2a5eabc89163aaa2c749dac597f380e01f92e6e08090008a57e
MD5 58c96cac97ebd822ad7be1274d5bccb1
SHA1 fd4a759cbe64f47aac53e2986eb30ccee044f42d
SHA512 8a29add3ec11d772bb7f26f6615a3c14cd040ca008105315aa9a9c34f2dc04e89b53b6ed9d58987205f082d5db1d7fefd977c5bb97d9f07dcdc6c07a3abd294f
SSDEEP 49152:3kHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH:
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

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\slkewoal = "0"	svchost.exe

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
2436	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\slkewoal\ImagePath = "C:\\Windows\\SysWOW64\\slkewoal\\fuzaucfy.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2404	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2568	fuzaucfy.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2568 set thread context of 2404	2568	fuzaucfy.exe	41

Launches sc.exe 3 IoCs

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

pid	Process
2648	sc.exe
2652	sc.exe
2416	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 2868 wrote to memory of 2700	2868	58c96cac97ebd822ad7be1274d5bccb1_JaffaCakes118.exe	28
PID 2868 wrote to memory of 2700	2868	58c96cac97ebd822ad7be1274d5bccb1_JaffaCakes118.exe	28
PID 2868 wrote to memory of 2700	2868	58c96cac97ebd822ad7be1274d5bccb1_JaffaCakes118.exe	28
PID 2868 wrote to memory of 2700	2868	58c96cac97ebd822ad7be1274d5bccb1_JaffaCakes118.exe	28
PID 2868 wrote to memory of 2552	2868	58c96cac97ebd822ad7be1274d5bccb1_JaffaCakes118.exe	30
PID 2868 wrote to memory of 2552	2868	58c96cac97ebd822ad7be1274d5bccb1_JaffaCakes118.exe	30
PID 2868 wrote to memory of 2552	2868	58c96cac97ebd822ad7be1274d5bccb1_JaffaCakes118.exe	30
PID 2868 wrote to memory of 2552	2868	58c96cac97ebd822ad7be1274d5bccb1_JaffaCakes118.exe	30
PID 2868 wrote to memory of 2648	2868	58c96cac97ebd822ad7be1274d5bccb1_JaffaCakes118.exe	32
PID 2868 wrote to memory of 2648	2868	58c96cac97ebd822ad7be1274d5bccb1_JaffaCakes118.exe	32
PID 2868 wrote to memory of 2648	2868	58c96cac97ebd822ad7be1274d5bccb1_JaffaCakes118.exe	32
PID 2868 wrote to memory of 2648	2868	58c96cac97ebd822ad7be1274d5bccb1_JaffaCakes118.exe	32
PID 2868 wrote to memory of 2652	2868	58c96cac97ebd822ad7be1274d5bccb1_JaffaCakes118.exe	34
PID 2868 wrote to memory of 2652	2868	58c96cac97ebd822ad7be1274d5bccb1_JaffaCakes118.exe	34
PID 2868 wrote to memory of 2652	2868	58c96cac97ebd822ad7be1274d5bccb1_JaffaCakes118.exe	34
PID 2868 wrote to memory of 2652	2868	58c96cac97ebd822ad7be1274d5bccb1_JaffaCakes118.exe	34
PID 2868 wrote to memory of 2416	2868	58c96cac97ebd822ad7be1274d5bccb1_JaffaCakes118.exe	36
PID 2868 wrote to memory of 2416	2868	58c96cac97ebd822ad7be1274d5bccb1_JaffaCakes118.exe	36
PID 2868 wrote to memory of 2416	2868	58c96cac97ebd822ad7be1274d5bccb1_JaffaCakes118.exe	36
PID 2868 wrote to memory of 2416	2868	58c96cac97ebd822ad7be1274d5bccb1_JaffaCakes118.exe	36
PID 2868 wrote to memory of 2436	2868	58c96cac97ebd822ad7be1274d5bccb1_JaffaCakes118.exe	39
PID 2868 wrote to memory of 2436	2868	58c96cac97ebd822ad7be1274d5bccb1_JaffaCakes118.exe	39
PID 2868 wrote to memory of 2436	2868	58c96cac97ebd822ad7be1274d5bccb1_JaffaCakes118.exe	39
PID 2868 wrote to memory of 2436	2868	58c96cac97ebd822ad7be1274d5bccb1_JaffaCakes118.exe	39
PID 2568 wrote to memory of 2404	2568	fuzaucfy.exe	41
PID 2568 wrote to memory of 2404	2568	fuzaucfy.exe	41
PID 2568 wrote to memory of 2404	2568	fuzaucfy.exe	41
PID 2568 wrote to memory of 2404	2568	fuzaucfy.exe	41
PID 2568 wrote to memory of 2404	2568	fuzaucfy.exe	41
PID 2568 wrote to memory of 2404	2568	fuzaucfy.exe	41

C:\Users\Admin\AppData\Local\Temp\58c96cac97ebd822ad7be1274d5bccb1_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\58c96cac97ebd822ad7be1274d5bccb1_JaffaCakes118.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2868
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\slkewoal\
  2⤵
  PID:2700
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\fuzaucfy.exe" C:\Windows\SysWOW64\slkewoal\
  2⤵
  PID:2552
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create slkewoal binPath= "C:\Windows\SysWOW64\slkewoal\fuzaucfy.exe /d\"C:\Users\Admin\AppData\Local\Temp\58c96cac97ebd822ad7be1274d5bccb1_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:2648
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description slkewoal "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:2652
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start slkewoal
  2⤵
  - Launches sc.exe
  PID:2416
- 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:2436

C:\Windows\SysWOW64\slkewoal\fuzaucfy.exe
C:\Windows\SysWOW64\slkewoal\fuzaucfy.exe /d"C:\Users\Admin\AppData\Local\Temp\58c96cac97ebd822ad7be1274d5bccb1_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2568
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Windows security bypass
  - Sets service image path in registry
  - Deletes itself
  PID:2404

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

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

fuzaucfy.exe

Path C:\Users\Admin\AppData\Local\Temp\fuzaucfy.exe
Size 14.2MB
SHA256 63ae49daa07d12f5a32ee5b4e382c1fb506ae12f29ffbc66e2ca98af422f18df
MD5 75378e820a13201cda137749d119ae87
SHA1 d3e657ba031b2f359879f362e50df9660023422e
SHA512 a6595e6fe1c781e3af15f935f9d27775da70a4531b93fb24a5668edab0ff16c71264044c8059a283d224250a2dadce7943ce8be988f76972996bd7a4c39392c3
SSDEEP 49152:WkHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHn:
MD5 SHA1 SHA512 SSDEEP

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memory/2404-12-0x0000000000090000-0x00000000000A5000-memory.dmp

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memory/2404-20-0x0000000000090000-0x00000000000A5000-memory.dmp

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memory/2404-22-0x0000000000090000-0x00000000000A5000-memory.dmp

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memory/2404-21-0x0000000000090000-0x00000000000A5000-memory.dmp

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memory/2404-15-0x0000000000090000-0x00000000000A5000-memory.dmp

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memory/2404-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

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memory/2568-11-0x0000000000400000-0x0000000000785000-memory.dmp

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memory/2568-10-0x0000000000900000-0x0000000000A00000-memory.dmp

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memory/2568-18-0x0000000000400000-0x0000000000785000-memory.dmp

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memory/2868-1-0x0000000000910000-0x0000000000A10000-memory.dmp

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memory/2868-9-0x0000000000220000-0x0000000000233000-memory.dmp

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memory/2868-4-0x0000000000400000-0x0000000000785000-memory.dmp

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memory/2868-8-0x0000000000400000-0x0000000000785000-memory.dmp

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memory/2868-2-0x0000000000220000-0x0000000000233000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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