tofsee | d16f81bd79a1f5205caf07572c804995e43d377ba1fe66e921152373c9dddefe

General

Target

JaffaCakes118_e984c03bb1dd8c4784ade42bb3640c37.exe
Size

10.4MB
MD5

e984c03bb1dd8c4784ade42bb3640c37
SHA1

0c43f3df0d87535e8b3ba81344dab7a707a43adc
SHA256

d16f81bd79a1f5205caf07572c804995e43d377ba1fe66e921152373c9dddefe
SHA512

aab9304285cf63541f5f42e530ad24ddadee41054f9186ee8caa9470cae9f0b94df9f9c957b82999d4ead68d9254aff4ad986b04f24679c383dc7c69100500bb
SSDEEP

196608:Exxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxp:

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation 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
Tofsee family
tofsee
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
1940	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\blpjnwnu\ImagePath = "C:\\Windows\\SysWOW64\\blpjnwnu\\ydndrw.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-1-5-21-2045521122-590294423-3465680274-1000\Control Panel\International\Geo\Nation	JaffaCakes118_e984c03bb1dd8c4784ade42bb3640c37.exe

Deletes itself 1 IoCs

pid	Process
3384	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2996	ydndrw.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2996 set thread context of 3384	2996	ydndrw.exe	103

Launches sc.exe 3 IoCs

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

pid	Process
3896	sc.exe
2332	sc.exe
4732	sc.exe

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

System Information Discovery
T1082

Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

persistence privilege_escalation

Netsh Helper DLL

T1546.007

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

Program crash 2 IoCs

pid	pid_target	Process	procid_target
2976	4024	WerFault.exe	84
4724	2996	WerFault.exe	96

System Location Discovery: System Language Discovery 1 TTPs 9 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ydndrw.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_e984c03bb1dd8c4784ade42bb3640c37.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4024 wrote to memory of 3428	4024	JaffaCakes118_e984c03bb1dd8c4784ade42bb3640c37.exe	85
PID 4024 wrote to memory of 3428	4024	JaffaCakes118_e984c03bb1dd8c4784ade42bb3640c37.exe	85
PID 4024 wrote to memory of 3428	4024	JaffaCakes118_e984c03bb1dd8c4784ade42bb3640c37.exe	85
PID 4024 wrote to memory of 2764	4024	JaffaCakes118_e984c03bb1dd8c4784ade42bb3640c37.exe	88
PID 4024 wrote to memory of 2764	4024	JaffaCakes118_e984c03bb1dd8c4784ade42bb3640c37.exe	88
PID 4024 wrote to memory of 2764	4024	JaffaCakes118_e984c03bb1dd8c4784ade42bb3640c37.exe	88
PID 4024 wrote to memory of 3896	4024	JaffaCakes118_e984c03bb1dd8c4784ade42bb3640c37.exe	90
PID 4024 wrote to memory of 3896	4024	JaffaCakes118_e984c03bb1dd8c4784ade42bb3640c37.exe	90
PID 4024 wrote to memory of 3896	4024	JaffaCakes118_e984c03bb1dd8c4784ade42bb3640c37.exe	90
PID 4024 wrote to memory of 2332	4024	JaffaCakes118_e984c03bb1dd8c4784ade42bb3640c37.exe	92
PID 4024 wrote to memory of 2332	4024	JaffaCakes118_e984c03bb1dd8c4784ade42bb3640c37.exe	92
PID 4024 wrote to memory of 2332	4024	JaffaCakes118_e984c03bb1dd8c4784ade42bb3640c37.exe	92
PID 4024 wrote to memory of 4732	4024	JaffaCakes118_e984c03bb1dd8c4784ade42bb3640c37.exe	94
PID 4024 wrote to memory of 4732	4024	JaffaCakes118_e984c03bb1dd8c4784ade42bb3640c37.exe	94
PID 4024 wrote to memory of 4732	4024	JaffaCakes118_e984c03bb1dd8c4784ade42bb3640c37.exe	94
PID 4024 wrote to memory of 1940	4024	JaffaCakes118_e984c03bb1dd8c4784ade42bb3640c37.exe	97
PID 4024 wrote to memory of 1940	4024	JaffaCakes118_e984c03bb1dd8c4784ade42bb3640c37.exe	97
PID 4024 wrote to memory of 1940	4024	JaffaCakes118_e984c03bb1dd8c4784ade42bb3640c37.exe	97
PID 2996 wrote to memory of 3384	2996	ydndrw.exe	103
PID 2996 wrote to memory of 3384	2996	ydndrw.exe	103
PID 2996 wrote to memory of 3384	2996	ydndrw.exe	103
PID 2996 wrote to memory of 3384	2996	ydndrw.exe	103
PID 2996 wrote to memory of 3384	2996	ydndrw.exe	103

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_e984c03bb1dd8c4784ade42bb3640c37.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_e984c03bb1dd8c4784ade42bb3640c37.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4024
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\blpjnwnu\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3428
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ydndrw.exe" C:\Windows\SysWOW64\blpjnwnu\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2764
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create blpjnwnu binPath= "C:\Windows\SysWOW64\blpjnwnu\ydndrw.exe /d\"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_e984c03bb1dd8c4784ade42bb3640c37.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3896
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description blpjnwnu "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2332
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start blpjnwnu
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4732
- 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
  - Event Triggered Execution: Netsh Helper DLL
  - System Location Discovery: System Language Discovery
  PID:1940
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4024 -s 1160
  2⤵
  - Program crash
  PID:2976

C:\Windows\SysWOW64\blpjnwnu\ydndrw.exe
C:\Windows\SysWOW64\blpjnwnu\ydndrw.exe /d"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_e984c03bb1dd8c4784ade42bb3640c37.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2996
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:3384
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2996 -s 516
  2⤵
  - Program crash
  PID:4724

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 4024 -ip 4024
1⤵
PID:3756

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 2996 -ip 2996
1⤵
PID:4728

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

1

T1569

Service Execution

1

T1569.002

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

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

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

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

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

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
13.6MB

MD5
737f42345dcc07bc4871872a91d74ac2

SHA1
f435b60040beecce68ec67fa15f090e42480be89

SHA256
e635c32ca4eac539585882a20c545fa29c1717ac479adeec2b57300acfb66679

SHA512
ca200d00e4cecaf29cfad243fab90a57bfc779bd52dcb4836bf6ee6d44c75ff27b6f467ab16cfe189781243376d30674564a90aadedb3ee3e6d22286b9ca3db4

Download Submit
memory/2996-14-0x0000000000400000-0x0000000002F06000-memory.dmp

Filesize
43.0MB

Download
memory/3384-10-0x0000000000770000-0x0000000000785000-memory.dmp

Filesize
84KB

Download
memory/3384-12-0x0000000000770000-0x0000000000785000-memory.dmp

Filesize
84KB

Download
memory/3384-13-0x0000000000770000-0x0000000000785000-memory.dmp

Filesize
84KB

Download
memory/4024-0-0x0000000004C50000-0x0000000004C5D000-memory.dmp

Filesize
52KB

Download
memory/4024-1-0x0000000004C60000-0x0000000004C73000-memory.dmp

Filesize
76KB

Download
memory/4024-2-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4024-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4024-8-0x0000000004C60000-0x0000000004C73000-memory.dmp

Filesize
76KB

Download
memory/4024-7-0x0000000004C50000-0x0000000004C5D000-memory.dmp

Filesize
52KB

Download
memory/4024-6-0x0000000000400000-0x0000000002F06000-memory.dmp

Filesize
43.0MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads