tofsee | 8f15e641dd8747b7efc05cc65a32f51a81948a810dc95a24e6bbe6452acbcc5e

General

Target

557c4d35d2b818d536ec22bd4aa59bb4_JaffaCakes118.exe
Size

11.3MB
MD5

557c4d35d2b818d536ec22bd4aa59bb4
SHA1

bb164d817d6e48b89babfac2df525cb1bcb8daa7
SHA256

8f15e641dd8747b7efc05cc65a32f51a81948a810dc95a24e6bbe6452acbcc5e
SHA512

0d7f7e5cecd8147da8d9da5d2ba1d3e5640cdbb66c5763ff167fab8d8193c59521e934839aee32d2f47248a629b0fede1cfc4f2c1247b384d8fae1b2fc62a5a9
SSDEEP

24576:qPTYeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeu:qP

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
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
2860	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\rwbfdmno\ImagePath = "C:\\Windows\\SysWOW64\\rwbfdmno\\vcalqlzn.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-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	557c4d35d2b818d536ec22bd4aa59bb4_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
4908	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
428	vcalqlzn.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 428 set thread context of 4908	428	vcalqlzn.exe	107

Launches sc.exe 3 IoCs

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

pid	Process
2416	sc.exe
3968	sc.exe
3236	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 queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

Program crash 2 IoCs

pid	pid_target	Process	procid_target
4412	5108	WerFault.exe	83
3616	428	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	557c4d35d2b818d536ec22bd4aa59bb4_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	vcalqlzn.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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 5108 wrote to memory of 3092	5108	557c4d35d2b818d536ec22bd4aa59bb4_JaffaCakes118.exe	87
PID 5108 wrote to memory of 3092	5108	557c4d35d2b818d536ec22bd4aa59bb4_JaffaCakes118.exe	87
PID 5108 wrote to memory of 3092	5108	557c4d35d2b818d536ec22bd4aa59bb4_JaffaCakes118.exe	87
PID 5108 wrote to memory of 700	5108	557c4d35d2b818d536ec22bd4aa59bb4_JaffaCakes118.exe	91
PID 5108 wrote to memory of 700	5108	557c4d35d2b818d536ec22bd4aa59bb4_JaffaCakes118.exe	91
PID 5108 wrote to memory of 700	5108	557c4d35d2b818d536ec22bd4aa59bb4_JaffaCakes118.exe	91
PID 5108 wrote to memory of 2416	5108	557c4d35d2b818d536ec22bd4aa59bb4_JaffaCakes118.exe	93
PID 5108 wrote to memory of 2416	5108	557c4d35d2b818d536ec22bd4aa59bb4_JaffaCakes118.exe	93
PID 5108 wrote to memory of 2416	5108	557c4d35d2b818d536ec22bd4aa59bb4_JaffaCakes118.exe	93
PID 5108 wrote to memory of 3968	5108	557c4d35d2b818d536ec22bd4aa59bb4_JaffaCakes118.exe	96
PID 5108 wrote to memory of 3968	5108	557c4d35d2b818d536ec22bd4aa59bb4_JaffaCakes118.exe	96
PID 5108 wrote to memory of 3968	5108	557c4d35d2b818d536ec22bd4aa59bb4_JaffaCakes118.exe	96
PID 5108 wrote to memory of 3236	5108	557c4d35d2b818d536ec22bd4aa59bb4_JaffaCakes118.exe	99
PID 5108 wrote to memory of 3236	5108	557c4d35d2b818d536ec22bd4aa59bb4_JaffaCakes118.exe	99
PID 5108 wrote to memory of 3236	5108	557c4d35d2b818d536ec22bd4aa59bb4_JaffaCakes118.exe	99
PID 5108 wrote to memory of 2860	5108	557c4d35d2b818d536ec22bd4aa59bb4_JaffaCakes118.exe	102
PID 5108 wrote to memory of 2860	5108	557c4d35d2b818d536ec22bd4aa59bb4_JaffaCakes118.exe	102
PID 5108 wrote to memory of 2860	5108	557c4d35d2b818d536ec22bd4aa59bb4_JaffaCakes118.exe	102
PID 428 wrote to memory of 4908	428	vcalqlzn.exe	107
PID 428 wrote to memory of 4908	428	vcalqlzn.exe	107
PID 428 wrote to memory of 4908	428	vcalqlzn.exe	107
PID 428 wrote to memory of 4908	428	vcalqlzn.exe	107
PID 428 wrote to memory of 4908	428	vcalqlzn.exe	107

C:\Users\Admin\AppData\Local\Temp\557c4d35d2b818d536ec22bd4aa59bb4_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\557c4d35d2b818d536ec22bd4aa59bb4_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5108
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\rwbfdmno\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3092
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vcalqlzn.exe" C:\Windows\SysWOW64\rwbfdmno\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:700
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create rwbfdmno binPath= "C:\Windows\SysWOW64\rwbfdmno\vcalqlzn.exe /d\"C:\Users\Admin\AppData\Local\Temp\557c4d35d2b818d536ec22bd4aa59bb4_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2416
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description rwbfdmno "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3968
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start rwbfdmno
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3236
- 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:2860
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5108 -s 672
  2⤵
  - Program crash
  PID:4412

C:\Windows\SysWOW64\rwbfdmno\vcalqlzn.exe
C:\Windows\SysWOW64\rwbfdmno\vcalqlzn.exe /d"C:\Users\Admin\AppData\Local\Temp\557c4d35d2b818d536ec22bd4aa59bb4_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:428
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:4908
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 428 -s 512
  2⤵
  - Program crash
  PID:3616

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 5108 -ip 5108
1⤵
PID:1168

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 428 -ip 428
1⤵
PID:3216

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\vcalqlzn.exe

Filesize
14.3MB

MD5
6982eedb5c3a837783f0f41c7769a2de

SHA1
e4ffbaab673f09770144749f1477fc20b847dd29

SHA256
9bb12b115e59f1111164d5a23dd09d9645e29c11870ef924982bea6edb610608

SHA512
6de3971a18fec50fba689a4e9776d1cd3cba3f66dcd16baf7b6fa82f4daf8eb0d43176bd3597d8c3a8a0b7e21dc76f19fb6e24534d4836b188e0665cee07fb95

Download Submit
memory/428-13-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/428-11-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/428-12-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/428-19-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/4908-14-0x0000000001200000-0x0000000001215000-memory.dmp

Filesize
84KB

Download
memory/4908-16-0x0000000001200000-0x0000000001215000-memory.dmp

Filesize
84KB

Download
memory/4908-17-0x0000000001200000-0x0000000001215000-memory.dmp

Filesize
84KB

Download
memory/5108-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/5108-2-0x00000000021F0000-0x0000000002203000-memory.dmp

Filesize
76KB

Download
memory/5108-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/5108-9-0x00000000021F0000-0x0000000002203000-memory.dmp

Filesize
76KB

Download
memory/5108-8-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/5108-1-0x0000000000640000-0x0000000000740000-memory.dmp

Filesize
1024KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads