tofsee | b0ec02ce75172989fde89ba52703aa80b53d3ca9d4d6d1985fa0d0c25fface99

General

Target

81ea89d6b885907097699489aaca7261_JaffaCakes118.exe
Size

12.1MB
MD5

81ea89d6b885907097699489aaca7261
SHA1

cc04ba6273ce4ba0b083bbe93d992a3547cfd6c8
SHA256

b0ec02ce75172989fde89ba52703aa80b53d3ca9d4d6d1985fa0d0c25fface99
SHA512

eb40f112a368dddc382411cdebb8c31556122a28bcaa2893dc82f9b3fff40d8e5d7ed80049065da95150ee82e3ebe70bcdceeb0770c385bdad5faf259092182a
SSDEEP

49152:18yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyP:1

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation 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
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
4496	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\aypvabws\ImagePath = "C:\\Windows\\SysWOW64\\aypvabws\\eflufbpx.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-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	81ea89d6b885907097699489aaca7261_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
3176	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4748	eflufbpx.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4748 set thread context of 3176	4748	eflufbpx.exe	108

Launches sc.exe 3 IoCs

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

pid	Process
2284	sc.exe
1544	sc.exe
3904	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 value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

Program crash 2 IoCs

pid	pid_target	Process	procid_target
2388	784	WerFault.exe	83
4512	4748	WerFault.exe	101

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	81ea89d6b885907097699489aaca7261_JaffaCakes118.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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.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	eflufbpx.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 784 wrote to memory of 1988	784	81ea89d6b885907097699489aaca7261_JaffaCakes118.exe	89
PID 784 wrote to memory of 1988	784	81ea89d6b885907097699489aaca7261_JaffaCakes118.exe	89
PID 784 wrote to memory of 1988	784	81ea89d6b885907097699489aaca7261_JaffaCakes118.exe	89
PID 784 wrote to memory of 3784	784	81ea89d6b885907097699489aaca7261_JaffaCakes118.exe	91
PID 784 wrote to memory of 3784	784	81ea89d6b885907097699489aaca7261_JaffaCakes118.exe	91
PID 784 wrote to memory of 3784	784	81ea89d6b885907097699489aaca7261_JaffaCakes118.exe	91
PID 784 wrote to memory of 2284	784	81ea89d6b885907097699489aaca7261_JaffaCakes118.exe	95
PID 784 wrote to memory of 2284	784	81ea89d6b885907097699489aaca7261_JaffaCakes118.exe	95
PID 784 wrote to memory of 2284	784	81ea89d6b885907097699489aaca7261_JaffaCakes118.exe	95
PID 784 wrote to memory of 1544	784	81ea89d6b885907097699489aaca7261_JaffaCakes118.exe	97
PID 784 wrote to memory of 1544	784	81ea89d6b885907097699489aaca7261_JaffaCakes118.exe	97
PID 784 wrote to memory of 1544	784	81ea89d6b885907097699489aaca7261_JaffaCakes118.exe	97
PID 784 wrote to memory of 3904	784	81ea89d6b885907097699489aaca7261_JaffaCakes118.exe	99
PID 784 wrote to memory of 3904	784	81ea89d6b885907097699489aaca7261_JaffaCakes118.exe	99
PID 784 wrote to memory of 3904	784	81ea89d6b885907097699489aaca7261_JaffaCakes118.exe	99
PID 784 wrote to memory of 4496	784	81ea89d6b885907097699489aaca7261_JaffaCakes118.exe	102
PID 784 wrote to memory of 4496	784	81ea89d6b885907097699489aaca7261_JaffaCakes118.exe	102
PID 784 wrote to memory of 4496	784	81ea89d6b885907097699489aaca7261_JaffaCakes118.exe	102
PID 4748 wrote to memory of 3176	4748	eflufbpx.exe	108
PID 4748 wrote to memory of 3176	4748	eflufbpx.exe	108
PID 4748 wrote to memory of 3176	4748	eflufbpx.exe	108
PID 4748 wrote to memory of 3176	4748	eflufbpx.exe	108
PID 4748 wrote to memory of 3176	4748	eflufbpx.exe	108

C:\Users\Admin\AppData\Local\Temp\81ea89d6b885907097699489aaca7261_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\81ea89d6b885907097699489aaca7261_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:784
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\aypvabws\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1988
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\eflufbpx.exe" C:\Windows\SysWOW64\aypvabws\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3784
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create aypvabws binPath= "C:\Windows\SysWOW64\aypvabws\eflufbpx.exe /d\"C:\Users\Admin\AppData\Local\Temp\81ea89d6b885907097699489aaca7261_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2284
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description aypvabws "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1544
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start aypvabws
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3904
- 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:4496
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 784 -s 652
  2⤵
  - Program crash
  PID:2388

C:\Windows\SysWOW64\aypvabws\eflufbpx.exe
C:\Windows\SysWOW64\aypvabws\eflufbpx.exe /d"C:\Users\Admin\AppData\Local\Temp\81ea89d6b885907097699489aaca7261_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4748
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:3176
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4748 -s 508
  2⤵
  - Program crash
  PID:4512

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 784 -ip 784
1⤵
PID:1584

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 4748 -ip 4748
1⤵
PID:3272

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\eflufbpx.exe

Filesize
14.2MB

MD5
2bba9f22291c6b2f350a25d622e1ec09

SHA1
db58af901bbf4e399ef26e7438957ea539915d1a

SHA256
1747239c1cc7e625b5edbe2471d7cf9d78f8939c9ddd45eb9db96b8fd4be9d45

SHA512
cd1a1338a94267c26c87130a635718c45ec5105773ddc952eaff0e4b941cf5dc506e32a0f1ff9ba67bd61dd0d9502672e2c6710a84fc1222f5f30213596a13ba

Download Submit
memory/784-2-0x0000000000A50000-0x0000000000A63000-memory.dmp

Filesize
76KB

Download
memory/784-1-0x0000000000AE0000-0x0000000000BE0000-memory.dmp

Filesize
1024KB

Download
memory/784-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/784-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/784-7-0x0000000000400000-0x00000000008E9000-memory.dmp

Filesize
4.9MB

Download
memory/784-8-0x0000000000A50000-0x0000000000A63000-memory.dmp

Filesize
76KB

Download
memory/3176-11-0x0000000000AA0000-0x0000000000AB5000-memory.dmp

Filesize
84KB

Download
memory/3176-13-0x0000000000AA0000-0x0000000000AB5000-memory.dmp

Filesize
84KB

Download
memory/3176-14-0x0000000000AA0000-0x0000000000AB5000-memory.dmp

Filesize
84KB

Download
memory/4748-15-0x0000000000400000-0x00000000008E9000-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