tofsee | a0d8d5274a90022480fa0b8f55b2e072eddd6287a2f12d77b0555062d33c970a

General

Target

JaffaCakes118_a0d8d5274a90022480fa0b8f55b2e072eddd6287a2f12d77b0555062d33c970a.exe
Size

236KB
MD5

7679009858a84abb6a9ec42accbf6733
SHA1

48b898b42380444677620354c9a1fa26de3d22e5
SHA256

a0d8d5274a90022480fa0b8f55b2e072eddd6287a2f12d77b0555062d33c970a
SHA512

80f9aee782c84f7242b2e5eac8d24d7274b2b29ad80a56f9bfee6017cd2ecf88de23625cfd0037bc27507e9a0c43884c29c8471b4c10f9d7e0d525ed7aaacdc6
SSDEEP

6144:coD6bWHeHdjZXhTjBlL02Xu9zxK4HZmkMkmKZWzg:c6L+9jFhr02Xuxk0ZUKo

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
3696	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\arsazhuo\ImagePath = "C:\\Windows\\SysWOW64\\arsazhuo\\cssshyew.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-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation	JaffaCakes118_a0d8d5274a90022480fa0b8f55b2e072eddd6287a2f12d77b0555062d33c970a.exe

Deletes itself 1 IoCs

pid	Process
4104	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2008	cssshyew.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2008 set thread context of 4104	2008	cssshyew.exe	105

Launches sc.exe 3 IoCs

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

pid	Process
4592	sc.exe
1028	sc.exe
1548	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 6 IoCs

pid	pid_target	Process	procid_target
708	3564	WerFault.exe	82
4580	3564	WerFault.exe	82
4704	3564	WerFault.exe	82
2496	2008	WerFault.exe	94
116	2008	WerFault.exe	94
3876	2008	WerFault.exe	94

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	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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cssshyew.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_a0d8d5274a90022480fa0b8f55b2e072eddd6287a2f12d77b0555062d33c970a.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3564 wrote to memory of 4772	3564	JaffaCakes118_a0d8d5274a90022480fa0b8f55b2e072eddd6287a2f12d77b0555062d33c970a.exe	83
PID 3564 wrote to memory of 4772	3564	JaffaCakes118_a0d8d5274a90022480fa0b8f55b2e072eddd6287a2f12d77b0555062d33c970a.exe	83
PID 3564 wrote to memory of 4772	3564	JaffaCakes118_a0d8d5274a90022480fa0b8f55b2e072eddd6287a2f12d77b0555062d33c970a.exe	83
PID 3564 wrote to memory of 2092	3564	JaffaCakes118_a0d8d5274a90022480fa0b8f55b2e072eddd6287a2f12d77b0555062d33c970a.exe	85
PID 3564 wrote to memory of 2092	3564	JaffaCakes118_a0d8d5274a90022480fa0b8f55b2e072eddd6287a2f12d77b0555062d33c970a.exe	85
PID 3564 wrote to memory of 2092	3564	JaffaCakes118_a0d8d5274a90022480fa0b8f55b2e072eddd6287a2f12d77b0555062d33c970a.exe	85
PID 3564 wrote to memory of 4592	3564	JaffaCakes118_a0d8d5274a90022480fa0b8f55b2e072eddd6287a2f12d77b0555062d33c970a.exe	87
PID 3564 wrote to memory of 4592	3564	JaffaCakes118_a0d8d5274a90022480fa0b8f55b2e072eddd6287a2f12d77b0555062d33c970a.exe	87
PID 3564 wrote to memory of 4592	3564	JaffaCakes118_a0d8d5274a90022480fa0b8f55b2e072eddd6287a2f12d77b0555062d33c970a.exe	87
PID 3564 wrote to memory of 1028	3564	JaffaCakes118_a0d8d5274a90022480fa0b8f55b2e072eddd6287a2f12d77b0555062d33c970a.exe	89
PID 3564 wrote to memory of 1028	3564	JaffaCakes118_a0d8d5274a90022480fa0b8f55b2e072eddd6287a2f12d77b0555062d33c970a.exe	89
PID 3564 wrote to memory of 1028	3564	JaffaCakes118_a0d8d5274a90022480fa0b8f55b2e072eddd6287a2f12d77b0555062d33c970a.exe	89
PID 3564 wrote to memory of 1548	3564	JaffaCakes118_a0d8d5274a90022480fa0b8f55b2e072eddd6287a2f12d77b0555062d33c970a.exe	92
PID 3564 wrote to memory of 1548	3564	JaffaCakes118_a0d8d5274a90022480fa0b8f55b2e072eddd6287a2f12d77b0555062d33c970a.exe	92
PID 3564 wrote to memory of 1548	3564	JaffaCakes118_a0d8d5274a90022480fa0b8f55b2e072eddd6287a2f12d77b0555062d33c970a.exe	92
PID 3564 wrote to memory of 3696	3564	JaffaCakes118_a0d8d5274a90022480fa0b8f55b2e072eddd6287a2f12d77b0555062d33c970a.exe	95
PID 3564 wrote to memory of 3696	3564	JaffaCakes118_a0d8d5274a90022480fa0b8f55b2e072eddd6287a2f12d77b0555062d33c970a.exe	95
PID 3564 wrote to memory of 3696	3564	JaffaCakes118_a0d8d5274a90022480fa0b8f55b2e072eddd6287a2f12d77b0555062d33c970a.exe	95
PID 2008 wrote to memory of 4104	2008	cssshyew.exe	105
PID 2008 wrote to memory of 4104	2008	cssshyew.exe	105
PID 2008 wrote to memory of 4104	2008	cssshyew.exe	105
PID 2008 wrote to memory of 4104	2008	cssshyew.exe	105
PID 2008 wrote to memory of 4104	2008	cssshyew.exe	105

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_a0d8d5274a90022480fa0b8f55b2e072eddd6287a2f12d77b0555062d33c970a.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_a0d8d5274a90022480fa0b8f55b2e072eddd6287a2f12d77b0555062d33c970a.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3564
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\arsazhuo\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4772
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\cssshyew.exe" C:\Windows\SysWOW64\arsazhuo\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2092
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create arsazhuo binPath= "C:\Windows\SysWOW64\arsazhuo\cssshyew.exe /d\"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_a0d8d5274a90022480fa0b8f55b2e072eddd6287a2f12d77b0555062d33c970a.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4592
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description arsazhuo "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1028
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start arsazhuo
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1548
- 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:3696
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3564 -s 676
  2⤵
  - Program crash
  PID:708
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3564 -s 584
  2⤵
  - Program crash
  PID:4580
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3564 -s 656
  2⤵
  - Program crash
  PID:4704

C:\Windows\SysWOW64\arsazhuo\cssshyew.exe
C:\Windows\SysWOW64\arsazhuo\cssshyew.exe /d"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_a0d8d5274a90022480fa0b8f55b2e072eddd6287a2f12d77b0555062d33c970a.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2008
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:4104
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2008 -s 516
  2⤵
  - Program crash
  PID:2496
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2008 -s 536
  2⤵
  - Program crash
  PID:116
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2008 -s 532
  2⤵
  - Program crash
  PID:3876

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3564 -ip 3564
1⤵
PID:3912

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 3564 -ip 3564
1⤵
PID:3892

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 484 -p 3564 -ip 3564
1⤵
PID:3956

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 472 -p 2008 -ip 2008
1⤵
PID:1684

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 548 -p 2008 -ip 2008
1⤵
PID:3964

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 2008 -ip 2008
1⤵
PID:1488

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\cssshyew.exe

Filesize
12.0MB

MD5
494c0e331cf50730476349cbcbb1288a

SHA1
ed4eecdfed33e6fb00cf6780ebe4d0c3fd37e6bd

SHA256
2514ff09812ac9339a120e828afe39615f94f786270a689815930da13eb2ef17

SHA512
cb3ca6f9e3ed0ba12096e24f4d7ade0c7c7f8a356799cca81cf40e32b51e3a85fdea09182032340ae45ee010f7f55aba2e365c5b1f6dc3b61e566eb2f690b22a

Download Submit
memory/2008-11-0x0000000000400000-0x000000000086B000-memory.dmp

Filesize
4.4MB

Download
memory/2008-16-0x0000000000400000-0x000000000086B000-memory.dmp

Filesize
4.4MB

Download
memory/3564-1-0x00000000008E0000-0x00000000009E0000-memory.dmp

Filesize
1024KB

Download
memory/3564-2-0x0000000000CC0000-0x0000000000CD3000-memory.dmp

Filesize
76KB

Download
memory/3564-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3564-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3564-8-0x0000000000400000-0x000000000086B000-memory.dmp

Filesize
4.4MB

Download
memory/3564-9-0x0000000000CC0000-0x0000000000CD3000-memory.dmp

Filesize
76KB

Download
memory/4104-12-0x00000000006C0000-0x00000000006D5000-memory.dmp

Filesize
84KB

Download
memory/4104-14-0x00000000006C0000-0x00000000006D5000-memory.dmp

Filesize
84KB

Download
memory/4104-15-0x00000000006C0000-0x00000000006D5000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads