tofsee | 16fdbb6f45f722fffffafa455e8c5dd268c895e6b050031f40ab557be5240332

General

Target

f3baa4ed45dc9d0b254f70e6e4b0ac0f_JaffaCakes118.exe
Size

344KB
MD5

f3baa4ed45dc9d0b254f70e6e4b0ac0f
SHA1

b3aa03c4bebf4d65227f54f2cafd1e50daa8aebe
SHA256

16fdbb6f45f722fffffafa455e8c5dd268c895e6b050031f40ab557be5240332
SHA512

13d2af499e0ae5819ced2d9086926dbd73259efa24e64705651899f6f1d730e8ed0b36d3438d4271a9254979f132523a3fb9f0994bb77a2a1d2105618f0bbb4a
SSDEEP

6144:BPhtfImvvB2SRwvGklHadh1jCTz9Up+pcBywGFIutJ1H:BXIuvBPRw+klH+PjCn9UpJBlGO

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

quadoil.ru

lakeflex.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
752	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\vctuzlzk\ImagePath = "C:\\Windows\\SysWOW64\\vctuzlzk\\gmhktccx.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-1-5-21-2288054676-1871194608-3559553667-1000\Control Panel\International\Geo\Nation	f3baa4ed45dc9d0b254f70e6e4b0ac0f_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
872	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2312	gmhktccx.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2312 set thread context of 872	2312	gmhktccx.exe	108

Launches sc.exe 3 IoCs

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

pid	Process
2908	sc.exe
3080	sc.exe
4952	sc.exe

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

System Information Discovery
T1082

Program crash 2 IoCs

pid	pid_target	Process	procid_target
3068	4620	WerFault.exe	84
4892	2312	WerFault.exe	103

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4620 wrote to memory of 4148	4620	f3baa4ed45dc9d0b254f70e6e4b0ac0f_JaffaCakes118.exe	90
PID 4620 wrote to memory of 4148	4620	f3baa4ed45dc9d0b254f70e6e4b0ac0f_JaffaCakes118.exe	90
PID 4620 wrote to memory of 4148	4620	f3baa4ed45dc9d0b254f70e6e4b0ac0f_JaffaCakes118.exe	90
PID 4620 wrote to memory of 3376	4620	f3baa4ed45dc9d0b254f70e6e4b0ac0f_JaffaCakes118.exe	93
PID 4620 wrote to memory of 3376	4620	f3baa4ed45dc9d0b254f70e6e4b0ac0f_JaffaCakes118.exe	93
PID 4620 wrote to memory of 3376	4620	f3baa4ed45dc9d0b254f70e6e4b0ac0f_JaffaCakes118.exe	93
PID 4620 wrote to memory of 2908	4620	f3baa4ed45dc9d0b254f70e6e4b0ac0f_JaffaCakes118.exe	97
PID 4620 wrote to memory of 2908	4620	f3baa4ed45dc9d0b254f70e6e4b0ac0f_JaffaCakes118.exe	97
PID 4620 wrote to memory of 2908	4620	f3baa4ed45dc9d0b254f70e6e4b0ac0f_JaffaCakes118.exe	97
PID 4620 wrote to memory of 3080	4620	f3baa4ed45dc9d0b254f70e6e4b0ac0f_JaffaCakes118.exe	99
PID 4620 wrote to memory of 3080	4620	f3baa4ed45dc9d0b254f70e6e4b0ac0f_JaffaCakes118.exe	99
PID 4620 wrote to memory of 3080	4620	f3baa4ed45dc9d0b254f70e6e4b0ac0f_JaffaCakes118.exe	99
PID 4620 wrote to memory of 4952	4620	f3baa4ed45dc9d0b254f70e6e4b0ac0f_JaffaCakes118.exe	101
PID 4620 wrote to memory of 4952	4620	f3baa4ed45dc9d0b254f70e6e4b0ac0f_JaffaCakes118.exe	101
PID 4620 wrote to memory of 4952	4620	f3baa4ed45dc9d0b254f70e6e4b0ac0f_JaffaCakes118.exe	101
PID 4620 wrote to memory of 752	4620	f3baa4ed45dc9d0b254f70e6e4b0ac0f_JaffaCakes118.exe	104
PID 4620 wrote to memory of 752	4620	f3baa4ed45dc9d0b254f70e6e4b0ac0f_JaffaCakes118.exe	104
PID 4620 wrote to memory of 752	4620	f3baa4ed45dc9d0b254f70e6e4b0ac0f_JaffaCakes118.exe	104
PID 2312 wrote to memory of 872	2312	gmhktccx.exe	108
PID 2312 wrote to memory of 872	2312	gmhktccx.exe	108
PID 2312 wrote to memory of 872	2312	gmhktccx.exe	108
PID 2312 wrote to memory of 872	2312	gmhktccx.exe	108
PID 2312 wrote to memory of 872	2312	gmhktccx.exe	108

C:\Users\Admin\AppData\Local\Temp\f3baa4ed45dc9d0b254f70e6e4b0ac0f_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f3baa4ed45dc9d0b254f70e6e4b0ac0f_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4620
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\vctuzlzk\
  2⤵
  PID:4148
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\gmhktccx.exe" C:\Windows\SysWOW64\vctuzlzk\
  2⤵
  PID:3376
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create vctuzlzk binPath= "C:\Windows\SysWOW64\vctuzlzk\gmhktccx.exe /d\"C:\Users\Admin\AppData\Local\Temp\f3baa4ed45dc9d0b254f70e6e4b0ac0f_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:2908
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description vctuzlzk "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:3080
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start vctuzlzk
  2⤵
  - Launches sc.exe
  PID:4952
- 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:752
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4620 -s 892
  2⤵
  - Program crash
  PID:3068

C:\Windows\SysWOW64\vctuzlzk\gmhktccx.exe
C:\Windows\SysWOW64\vctuzlzk\gmhktccx.exe /d"C:\Users\Admin\AppData\Local\Temp\f3baa4ed45dc9d0b254f70e6e4b0ac0f_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2312
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:872
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2312 -s 532
  2⤵
  - Program crash
  PID:4892

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 4620 -ip 4620
1⤵
PID:2464

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 472 -p 2312 -ip 2312
1⤵
PID:1452

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

1

T1562

Disable or Modify System Firewall

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
14.7MB

MD5
a6bdf7aac06349571132d07c13abc748

SHA1
43406290978134f1e4ef0f72ee29776dbc278d24

SHA256
57180047e973a0e5f85dce919d956f6b669ab14d71d7eb238c1424f8476c1742

SHA512
d824f5fdd449b819f60f5b90ed2d95b69267183b1512a0036b0d6a286d1541ad118e5bcc2138bec341bb0507e60b52548f3a9420d80b2f35d3c992e649ee1b05

Download Submit
memory/872-16-0x0000000000F50000-0x0000000000F65000-memory.dmp

Filesize
84KB

Download
memory/872-11-0x0000000000F50000-0x0000000000F65000-memory.dmp

Filesize
84KB

Download
memory/872-18-0x0000000000F50000-0x0000000000F65000-memory.dmp

Filesize
84KB

Download
memory/872-19-0x0000000000F50000-0x0000000000F65000-memory.dmp

Filesize
84KB

Download
memory/2312-10-0x0000000000850000-0x0000000000950000-memory.dmp

Filesize
1024KB

Download
memory/2312-12-0x0000000000400000-0x0000000000788000-memory.dmp

Filesize
3.5MB

Download
memory/2312-17-0x0000000000400000-0x0000000000788000-memory.dmp

Filesize
3.5MB

Download
memory/4620-4-0x0000000000400000-0x0000000000788000-memory.dmp

Filesize
3.5MB

Download
memory/4620-2-0x0000000000920000-0x0000000000933000-memory.dmp

Filesize
76KB

Download
memory/4620-8-0x0000000000400000-0x0000000000788000-memory.dmp

Filesize
3.5MB

Download
memory/4620-9-0x0000000000920000-0x0000000000933000-memory.dmp

Filesize
76KB

Download
memory/4620-1-0x0000000000A30000-0x0000000000B30000-memory.dmp

Filesize
1024KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads