tofsee | f8b2c110a680ee0fad4fc129351ad835fb959bc6ad5c99aa707aec7887affee9

General

Target

f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe
Size

12.0MB
MD5

f24e01b5427f0548a8b5fcb06a03d6cb
SHA1

c1225c08af8b71beeb8e934038ca10b8edcce686
SHA256

f8b2c110a680ee0fad4fc129351ad835fb959bc6ad5c99aa707aec7887affee9
SHA512

09d65fa5696a76932abdb0e5e647592a643baa3080205ce1d4eea58123e21d92776c002aba63c68fe1f1bc407963803e2913e5db11e5e80a909cc0ab139191a1
SSDEEP

24576:cT8rgnPp+RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRf:sp+

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

43.231.4.6

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

Processes:

svchost.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\SysWOW64\fefcxjns = "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

Processes:

netsh.exe

pid process

2748 netsh.exe

pid	process
2748	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\fefcxjns\ImagePath = "C:\\Windows\\SysWOW64\\fefcxjns\\cuiwkjzt.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

2404 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

cuiwkjzt.exe

pid process

2632 cuiwkjzt.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

cuiwkjzt.exe

description pid process target process

PID 2632 set thread context of 2404 2632 cuiwkjzt.exe svchost.exe
Launches sc.exe 3 IoCs
Sc.exe is a Windows utlilty to control services on the system.

Processes:

sc.exesc.exesc.exe

pid process

2612 sc.exe
2768 sc.exe
2668 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
2404	svchost.exe

pid	process
2632	cuiwkjzt.exe

description	pid	process	target process
PID 2632 set thread context of 2404	2632	cuiwkjzt.exe	svchost.exe

pid	process
2612	sc.exe
2768	sc.exe
2668	sc.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.execuiwkjzt.exe

description	pid	process	target process
PID 2184 wrote to memory of 2892	2184	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	cmd.exe
PID 2184 wrote to memory of 2892	2184	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	cmd.exe
PID 2184 wrote to memory of 2892	2184	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	cmd.exe
PID 2184 wrote to memory of 2892	2184	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	cmd.exe
PID 2184 wrote to memory of 2256	2184	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	cmd.exe
PID 2184 wrote to memory of 2256	2184	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	cmd.exe
PID 2184 wrote to memory of 2256	2184	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	cmd.exe
PID 2184 wrote to memory of 2256	2184	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	cmd.exe
PID 2184 wrote to memory of 2612	2184	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	sc.exe
PID 2184 wrote to memory of 2612	2184	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	sc.exe
PID 2184 wrote to memory of 2612	2184	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	sc.exe
PID 2184 wrote to memory of 2612	2184	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	sc.exe
PID 2184 wrote to memory of 2768	2184	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	sc.exe
PID 2184 wrote to memory of 2768	2184	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	sc.exe
PID 2184 wrote to memory of 2768	2184	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	sc.exe
PID 2184 wrote to memory of 2768	2184	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	sc.exe
PID 2184 wrote to memory of 2668	2184	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	sc.exe
PID 2184 wrote to memory of 2668	2184	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	sc.exe
PID 2184 wrote to memory of 2668	2184	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	sc.exe
PID 2184 wrote to memory of 2668	2184	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	sc.exe
PID 2184 wrote to memory of 2748	2184	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	netsh.exe
PID 2184 wrote to memory of 2748	2184	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	netsh.exe
PID 2184 wrote to memory of 2748	2184	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	netsh.exe
PID 2184 wrote to memory of 2748	2184	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	netsh.exe
PID 2632 wrote to memory of 2404	2632	cuiwkjzt.exe	svchost.exe
PID 2632 wrote to memory of 2404	2632	cuiwkjzt.exe	svchost.exe
PID 2632 wrote to memory of 2404	2632	cuiwkjzt.exe	svchost.exe
PID 2632 wrote to memory of 2404	2632	cuiwkjzt.exe	svchost.exe
PID 2632 wrote to memory of 2404	2632	cuiwkjzt.exe	svchost.exe
PID 2632 wrote to memory of 2404	2632	cuiwkjzt.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2184

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\fefcxjns\
2⤵
PID:2892

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\cuiwkjzt.exe" C:\Windows\SysWOW64\fefcxjns\
2⤵
PID:2256

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create fefcxjns binPath= "C:\Windows\SysWOW64\fefcxjns\cuiwkjzt.exe /d\"C:\Users\Admin\AppData\Local\Temp\f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:2612

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description fefcxjns "wifi internet conection"
2⤵
- Launches sc.exe
PID:2768

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start fefcxjns
2⤵
- Launches sc.exe
PID:2668

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:2748

C:\Windows\SysWOW64\fefcxjns\cuiwkjzt.exe
C:\Windows\SysWOW64\fefcxjns\cuiwkjzt.exe /d"C:\Users\Admin\AppData\Local\Temp\f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2632

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

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Defense Evasion

Impair Defenses

2

T1562

Disable or Modify System Firewall

1

T1562.004

Disable or Modify Tools

Modify Registry

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\cuiwkjzt.exe

Filesize
13.1MB

MD5
9b0ea4b6ef89bbfeadfd57e4b2e89ea5

SHA1
9757661bb6728d1ca8da7398886a404c63f38fc6

SHA256
8a3ddf5939647c2065714523cea3f1807a825152520d6e128d00e6717cca785a

SHA512
9427b53206c70a83f93adf458bc1c025b0bf4daec3b18d740f31dfcf53c87e73a84338955b4f5f78d4fecb2935ab90de0d51f7ce02312b428e4790a7f79e4d52

Download Submit
memory/2184-1-0x0000000000A20000-0x0000000000B20000-memory.dmp

Filesize
1024KB

Download
memory/2184-2-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/2184-4-0x0000000000400000-0x00000000008EE000-memory.dmp

Filesize
4.9MB

Download
memory/2184-7-0x0000000000400000-0x00000000008EE000-memory.dmp

Filesize
4.9MB

Download
memory/2184-8-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

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

Filesize
4KB

Download
memory/2404-15-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2404-11-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2404-19-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2404-21-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2404-20-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2404-22-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2632-12-0x0000000000400000-0x00000000008EE000-memory.dmp

Filesize
4.9MB

Download
memory/2632-10-0x0000000000A50000-0x0000000000B50000-memory.dmp

Filesize
1024KB

Download
memory/2632-17-0x0000000000400000-0x00000000008EE000-memory.dmp

Filesize
4.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads