tofsee | 83f38a0bf26c992a4f4afe92229bbb7e77f80748c881d0ba39a3e1648483e6ef

General

Target

JaffaCakes118_83f38a0bf26c992a4f4afe92229bbb7e77f80748c881d0ba39a3e1648483e6ef.exe
Size

184KB
MD5

3053973d0d187f27f6154532ea00ee17
SHA1

c15d2971bed0e89f52193e09a94971d455d757cf
SHA256

83f38a0bf26c992a4f4afe92229bbb7e77f80748c881d0ba39a3e1648483e6ef
SHA512

eb5058b97a67b2b2ddd1f36e25d9f3a67e5115dab0ea520ab574261a12feab6541a38ec63ee7e9b0ef38e9f6a68677573fe4e690443ddb7230b8ac039d69d504
SSDEEP

3072:7SmyTMOQe1NOvLqfbsjUivt2QejgkNXSfMtcaJK3jPZPw8XehgC:7UTMHeajUQKBNXSkWaITP7m

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
1032	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\hznmpdje\ImagePath = "C:\\Windows\\SysWOW64\\hznmpdje\\bgcusvh.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	JaffaCakes118_83f38a0bf26c992a4f4afe92229bbb7e77f80748c881d0ba39a3e1648483e6ef.exe

Deletes itself 1 IoCs

pid	Process
2800	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1076	bgcusvh.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1076 set thread context of 2800	1076	bgcusvh.exe	98

Launches sc.exe 3 IoCs

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

pid	Process
4784	sc.exe
4484	sc.exe
3320	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
804	3252	WerFault.exe	81
3176	1076	WerFault.exe	92

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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_83f38a0bf26c992a4f4afe92229bbb7e77f80748c881d0ba39a3e1648483e6ef.exe
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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	bgcusvh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3252 wrote to memory of 3284	3252	JaffaCakes118_83f38a0bf26c992a4f4afe92229bbb7e77f80748c881d0ba39a3e1648483e6ef.exe	82
PID 3252 wrote to memory of 3284	3252	JaffaCakes118_83f38a0bf26c992a4f4afe92229bbb7e77f80748c881d0ba39a3e1648483e6ef.exe	82
PID 3252 wrote to memory of 3284	3252	JaffaCakes118_83f38a0bf26c992a4f4afe92229bbb7e77f80748c881d0ba39a3e1648483e6ef.exe	82
PID 3252 wrote to memory of 2140	3252	JaffaCakes118_83f38a0bf26c992a4f4afe92229bbb7e77f80748c881d0ba39a3e1648483e6ef.exe	84
PID 3252 wrote to memory of 2140	3252	JaffaCakes118_83f38a0bf26c992a4f4afe92229bbb7e77f80748c881d0ba39a3e1648483e6ef.exe	84
PID 3252 wrote to memory of 2140	3252	JaffaCakes118_83f38a0bf26c992a4f4afe92229bbb7e77f80748c881d0ba39a3e1648483e6ef.exe	84
PID 3252 wrote to memory of 4784	3252	JaffaCakes118_83f38a0bf26c992a4f4afe92229bbb7e77f80748c881d0ba39a3e1648483e6ef.exe	86
PID 3252 wrote to memory of 4784	3252	JaffaCakes118_83f38a0bf26c992a4f4afe92229bbb7e77f80748c881d0ba39a3e1648483e6ef.exe	86
PID 3252 wrote to memory of 4784	3252	JaffaCakes118_83f38a0bf26c992a4f4afe92229bbb7e77f80748c881d0ba39a3e1648483e6ef.exe	86
PID 3252 wrote to memory of 4484	3252	JaffaCakes118_83f38a0bf26c992a4f4afe92229bbb7e77f80748c881d0ba39a3e1648483e6ef.exe	88
PID 3252 wrote to memory of 4484	3252	JaffaCakes118_83f38a0bf26c992a4f4afe92229bbb7e77f80748c881d0ba39a3e1648483e6ef.exe	88
PID 3252 wrote to memory of 4484	3252	JaffaCakes118_83f38a0bf26c992a4f4afe92229bbb7e77f80748c881d0ba39a3e1648483e6ef.exe	88
PID 3252 wrote to memory of 3320	3252	JaffaCakes118_83f38a0bf26c992a4f4afe92229bbb7e77f80748c881d0ba39a3e1648483e6ef.exe	90
PID 3252 wrote to memory of 3320	3252	JaffaCakes118_83f38a0bf26c992a4f4afe92229bbb7e77f80748c881d0ba39a3e1648483e6ef.exe	90
PID 3252 wrote to memory of 3320	3252	JaffaCakes118_83f38a0bf26c992a4f4afe92229bbb7e77f80748c881d0ba39a3e1648483e6ef.exe	90
PID 3252 wrote to memory of 1032	3252	JaffaCakes118_83f38a0bf26c992a4f4afe92229bbb7e77f80748c881d0ba39a3e1648483e6ef.exe	93
PID 3252 wrote to memory of 1032	3252	JaffaCakes118_83f38a0bf26c992a4f4afe92229bbb7e77f80748c881d0ba39a3e1648483e6ef.exe	93
PID 3252 wrote to memory of 1032	3252	JaffaCakes118_83f38a0bf26c992a4f4afe92229bbb7e77f80748c881d0ba39a3e1648483e6ef.exe	93
PID 1076 wrote to memory of 2800	1076	bgcusvh.exe	98
PID 1076 wrote to memory of 2800	1076	bgcusvh.exe	98
PID 1076 wrote to memory of 2800	1076	bgcusvh.exe	98
PID 1076 wrote to memory of 2800	1076	bgcusvh.exe	98
PID 1076 wrote to memory of 2800	1076	bgcusvh.exe	98

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_83f38a0bf26c992a4f4afe92229bbb7e77f80748c881d0ba39a3e1648483e6ef.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_83f38a0bf26c992a4f4afe92229bbb7e77f80748c881d0ba39a3e1648483e6ef.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3252
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\hznmpdje\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3284
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\bgcusvh.exe" C:\Windows\SysWOW64\hznmpdje\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2140
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create hznmpdje binPath= "C:\Windows\SysWOW64\hznmpdje\bgcusvh.exe /d\"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_83f38a0bf26c992a4f4afe92229bbb7e77f80748c881d0ba39a3e1648483e6ef.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4784
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description hznmpdje "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4484
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start hznmpdje
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3320
- 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:1032
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3252 -s 648
  2⤵
  - Program crash
  PID:804

C:\Windows\SysWOW64\hznmpdje\bgcusvh.exe
C:\Windows\SysWOW64\hznmpdje\bgcusvh.exe /d"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_83f38a0bf26c992a4f4afe92229bbb7e77f80748c881d0ba39a3e1648483e6ef.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1076
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2800
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1076 -s 512
  2⤵
  - Program crash
  PID:3176

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 3252 -ip 3252
1⤵
PID:2740

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 1076 -ip 1076
1⤵
PID:4920

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

Loading Replay Monitor...

Downloads

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

Filesize
12.5MB

MD5
5255220e7a48d0bc4feedec9b2b3f9a7

SHA1
2c52879c9d31e35d819e9bbb1ed7e605d9c78f01

SHA256
fbc829a80b9aaf497f77cfc00c854d790a19a1069e081144aff4ff612006003f

SHA512
a69b62fbd671ded1f8c17e5e1be7baf93d02e52c5b49d6064922515119f6e95177bc8928ccad4d7c7d618aa5a89eab37cb32014a1f302c52d9f799efe8d137f2

Download Submit
memory/1076-13-0x0000000000400000-0x0000000000446000-memory.dmp

Filesize
280KB

Download
memory/1076-12-0x0000000000400000-0x0000000000446000-memory.dmp

Filesize
280KB

Download
memory/1076-11-0x0000000000400000-0x0000000000446000-memory.dmp

Filesize
280KB

Download
memory/1076-18-0x0000000000400000-0x0000000000446000-memory.dmp

Filesize
280KB

Download
memory/2800-14-0x00000000010C0000-0x00000000010D5000-memory.dmp

Filesize
84KB

Download
memory/2800-16-0x00000000010C0000-0x00000000010D5000-memory.dmp

Filesize
84KB

Download
memory/2800-17-0x00000000010C0000-0x00000000010D5000-memory.dmp

Filesize
84KB

Download
memory/3252-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3252-1-0x0000000000690000-0x0000000000790000-memory.dmp

Filesize
1024KB

Download
memory/3252-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3252-9-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download
memory/3252-8-0x0000000000400000-0x0000000000446000-memory.dmp

Filesize
280KB

Download
memory/3252-2-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads