tofsee | 8b1bbcd253430c07b2d9888582b495e829dab19646eb740aad3c72d17532a0c4

General

Target

f3fbaee673990549c395e139685f204d_JaffaCakes118.exe
Size

301KB
MD5

f3fbaee673990549c395e139685f204d
SHA1

8f834c1c8c8576d2bfb68582f249f221e91344f5
SHA256

8b1bbcd253430c07b2d9888582b495e829dab19646eb740aad3c72d17532a0c4
SHA512

33fa4d05de64edb21b58b2bb2ff4f9e84f0878e5ab2fc080b210136ec38d64338ce087899ff6a51fa458ca34c5fca2df777f34bde2ad3a94074c4a5f55850d01
SSDEEP

6144:3n78bLTMCrVUrxhkdceG8RjhqJL6ejOOhxxdeTr/ekI:XIb3jVUxU1foL6evzxd6L

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

defeatwax.ru

refabyd.info

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
2828	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\agdkgdzv\ImagePath = "C:\\Windows\\SysWOW64\\agdkgdzv\\rlueruzl.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-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	f3fbaee673990549c395e139685f204d_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
4132	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4720	rlueruzl.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4720 set thread context of 4132	4720	rlueruzl.exe	100

Launches sc.exe 3 IoCs

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

pid	Process
2556	sc.exe
3184	sc.exe
548	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
2440	432	WerFault.exe	82
512	4720	WerFault.exe	93

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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rlueruzl.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	f3fbaee673990549c395e139685f204d_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

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 432 wrote to memory of 4672	432	f3fbaee673990549c395e139685f204d_JaffaCakes118.exe	83
PID 432 wrote to memory of 4672	432	f3fbaee673990549c395e139685f204d_JaffaCakes118.exe	83
PID 432 wrote to memory of 4672	432	f3fbaee673990549c395e139685f204d_JaffaCakes118.exe	83
PID 432 wrote to memory of 4032	432	f3fbaee673990549c395e139685f204d_JaffaCakes118.exe	85
PID 432 wrote to memory of 4032	432	f3fbaee673990549c395e139685f204d_JaffaCakes118.exe	85
PID 432 wrote to memory of 4032	432	f3fbaee673990549c395e139685f204d_JaffaCakes118.exe	85
PID 432 wrote to memory of 2556	432	f3fbaee673990549c395e139685f204d_JaffaCakes118.exe	87
PID 432 wrote to memory of 2556	432	f3fbaee673990549c395e139685f204d_JaffaCakes118.exe	87
PID 432 wrote to memory of 2556	432	f3fbaee673990549c395e139685f204d_JaffaCakes118.exe	87
PID 432 wrote to memory of 3184	432	f3fbaee673990549c395e139685f204d_JaffaCakes118.exe	89
PID 432 wrote to memory of 3184	432	f3fbaee673990549c395e139685f204d_JaffaCakes118.exe	89
PID 432 wrote to memory of 3184	432	f3fbaee673990549c395e139685f204d_JaffaCakes118.exe	89
PID 432 wrote to memory of 548	432	f3fbaee673990549c395e139685f204d_JaffaCakes118.exe	91
PID 432 wrote to memory of 548	432	f3fbaee673990549c395e139685f204d_JaffaCakes118.exe	91
PID 432 wrote to memory of 548	432	f3fbaee673990549c395e139685f204d_JaffaCakes118.exe	91
PID 432 wrote to memory of 2828	432	f3fbaee673990549c395e139685f204d_JaffaCakes118.exe	94
PID 432 wrote to memory of 2828	432	f3fbaee673990549c395e139685f204d_JaffaCakes118.exe	94
PID 432 wrote to memory of 2828	432	f3fbaee673990549c395e139685f204d_JaffaCakes118.exe	94
PID 4720 wrote to memory of 4132	4720	rlueruzl.exe	100
PID 4720 wrote to memory of 4132	4720	rlueruzl.exe	100
PID 4720 wrote to memory of 4132	4720	rlueruzl.exe	100
PID 4720 wrote to memory of 4132	4720	rlueruzl.exe	100
PID 4720 wrote to memory of 4132	4720	rlueruzl.exe	100

C:\Users\Admin\AppData\Local\Temp\f3fbaee673990549c395e139685f204d_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f3fbaee673990549c395e139685f204d_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:432
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\agdkgdzv\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4672
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\rlueruzl.exe" C:\Windows\SysWOW64\agdkgdzv\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4032
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create agdkgdzv binPath= "C:\Windows\SysWOW64\agdkgdzv\rlueruzl.exe /d\"C:\Users\Admin\AppData\Local\Temp\f3fbaee673990549c395e139685f204d_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2556
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description agdkgdzv "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3184
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start agdkgdzv
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:548
- 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:2828
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 432 -s 1216
  2⤵
  - Program crash
  PID:2440

C:\Windows\SysWOW64\agdkgdzv\rlueruzl.exe
C:\Windows\SysWOW64\agdkgdzv\rlueruzl.exe /d"C:\Users\Admin\AppData\Local\Temp\f3fbaee673990549c395e139685f204d_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4720
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:4132
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4720 -s 508
  2⤵
  - Program crash
  PID:512

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 432 -ip 432
1⤵
PID:1348

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4720 -ip 4720
1⤵
PID:4252

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

Replay Monitor

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Downloads

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

Filesize
11.2MB

MD5
e06e1739e6f1074ff5bcb81a0ff84fb0

SHA1
6d743f87ccc753ffa1106b2d6dc1d705a6d969be

SHA256
bf844d9f50fdd3c86fb7a6486f86b11b0f3ee47bc2c3d13c25fbcbbd3066ca03

SHA512
28e99e9612cf4df6e2be84a135416ae682a99393cc2c053e05ab1481da6ce0855e88015092716952442c00793edca7f1c31bc083117ffe9e26197180511c31b4

Download Submit
memory/432-8-0x0000000000400000-0x0000000000459000-memory.dmp

Filesize
356KB

Download
memory/432-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/432-2-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download
memory/432-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/432-9-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download
memory/432-1-0x0000000000690000-0x0000000000790000-memory.dmp

Filesize
1024KB

Download
memory/4132-14-0x0000000000190000-0x00000000001A5000-memory.dmp

Filesize
84KB

Download
memory/4132-16-0x0000000000190000-0x00000000001A5000-memory.dmp

Filesize
84KB

Download
memory/4132-17-0x0000000000190000-0x00000000001A5000-memory.dmp

Filesize
84KB

Download
memory/4720-11-0x0000000000400000-0x0000000000459000-memory.dmp

Filesize
356KB

Download
memory/4720-12-0x0000000000400000-0x0000000000459000-memory.dmp

Filesize
356KB

Download
memory/4720-13-0x0000000000400000-0x0000000000459000-memory.dmp

Filesize
356KB

Download
memory/4720-18-0x0000000000400000-0x0000000000459000-memory.dmp

Filesize
356KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads