tofsee | e3a222160ea8ef3a551466e2307177cbba020d448a1c987810873aff2dfc217c

General

Target

3f1b7aa146a77bf2b405b38e0cf62df1_JaffaCakes118.exe
Size

13.9MB
MD5

3f1b7aa146a77bf2b405b38e0cf62df1
SHA1

2fc056586e9b126a845916e2f3f44093745fab97
SHA256

e3a222160ea8ef3a551466e2307177cbba020d448a1c987810873aff2dfc217c
SHA512

89a6a7204348648067827fb0baf36f188139b40466e71e39834650574b28b5e9257d6ad829fab082ae1a159b79d48e7b4d3fcfc1803086f6be8d5ecb1b9cd202
SSDEEP

196608:z3qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq3:z

Score

10^/10

tofsee 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
3980	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\cerzsspq\ImagePath = "C:\\Windows\\SysWOW64\\cerzsspq\\adwecemw.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-1-5-21-701583114-2636601053-947405450-1000\Control Panel\International\Geo\Nation	3f1b7aa146a77bf2b405b38e0cf62df1_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
3940	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
648	adwecemw.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 648 set thread context of 3940	648	adwecemw.exe	102

Launches sc.exe 3 IoCs

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

pid	Process
3408	sc.exe
960	sc.exe
644	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
4496	1592	WerFault.exe	82
3260	648	WerFault.exe	96

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1592 wrote to memory of 2780	1592	3f1b7aa146a77bf2b405b38e0cf62df1_JaffaCakes118.exe	86
PID 1592 wrote to memory of 2780	1592	3f1b7aa146a77bf2b405b38e0cf62df1_JaffaCakes118.exe	86
PID 1592 wrote to memory of 2780	1592	3f1b7aa146a77bf2b405b38e0cf62df1_JaffaCakes118.exe	86
PID 1592 wrote to memory of 2884	1592	3f1b7aa146a77bf2b405b38e0cf62df1_JaffaCakes118.exe	88
PID 1592 wrote to memory of 2884	1592	3f1b7aa146a77bf2b405b38e0cf62df1_JaffaCakes118.exe	88
PID 1592 wrote to memory of 2884	1592	3f1b7aa146a77bf2b405b38e0cf62df1_JaffaCakes118.exe	88
PID 1592 wrote to memory of 3408	1592	3f1b7aa146a77bf2b405b38e0cf62df1_JaffaCakes118.exe	90
PID 1592 wrote to memory of 3408	1592	3f1b7aa146a77bf2b405b38e0cf62df1_JaffaCakes118.exe	90
PID 1592 wrote to memory of 3408	1592	3f1b7aa146a77bf2b405b38e0cf62df1_JaffaCakes118.exe	90
PID 1592 wrote to memory of 960	1592	3f1b7aa146a77bf2b405b38e0cf62df1_JaffaCakes118.exe	92
PID 1592 wrote to memory of 960	1592	3f1b7aa146a77bf2b405b38e0cf62df1_JaffaCakes118.exe	92
PID 1592 wrote to memory of 960	1592	3f1b7aa146a77bf2b405b38e0cf62df1_JaffaCakes118.exe	92
PID 1592 wrote to memory of 644	1592	3f1b7aa146a77bf2b405b38e0cf62df1_JaffaCakes118.exe	94
PID 1592 wrote to memory of 644	1592	3f1b7aa146a77bf2b405b38e0cf62df1_JaffaCakes118.exe	94
PID 1592 wrote to memory of 644	1592	3f1b7aa146a77bf2b405b38e0cf62df1_JaffaCakes118.exe	94
PID 1592 wrote to memory of 3980	1592	3f1b7aa146a77bf2b405b38e0cf62df1_JaffaCakes118.exe	97
PID 1592 wrote to memory of 3980	1592	3f1b7aa146a77bf2b405b38e0cf62df1_JaffaCakes118.exe	97
PID 1592 wrote to memory of 3980	1592	3f1b7aa146a77bf2b405b38e0cf62df1_JaffaCakes118.exe	97
PID 648 wrote to memory of 3940	648	adwecemw.exe	102
PID 648 wrote to memory of 3940	648	adwecemw.exe	102
PID 648 wrote to memory of 3940	648	adwecemw.exe	102
PID 648 wrote to memory of 3940	648	adwecemw.exe	102
PID 648 wrote to memory of 3940	648	adwecemw.exe	102

C:\Users\Admin\AppData\Local\Temp\3f1b7aa146a77bf2b405b38e0cf62df1_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\3f1b7aa146a77bf2b405b38e0cf62df1_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1592
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\cerzsspq\
  2⤵
  PID:2780
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\adwecemw.exe" C:\Windows\SysWOW64\cerzsspq\
  2⤵
  PID:2884
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create cerzsspq binPath= "C:\Windows\SysWOW64\cerzsspq\adwecemw.exe /d\"C:\Users\Admin\AppData\Local\Temp\3f1b7aa146a77bf2b405b38e0cf62df1_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:3408
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description cerzsspq "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:960
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start cerzsspq
  2⤵
  - Launches sc.exe
  PID:644
- 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
  PID:3980
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1592 -s 1044
  2⤵
  - Program crash
  PID:4496

C:\Windows\SysWOW64\cerzsspq\adwecemw.exe
C:\Windows\SysWOW64\cerzsspq\adwecemw.exe /d"C:\Users\Admin\AppData\Local\Temp\3f1b7aa146a77bf2b405b38e0cf62df1_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:648
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:3940
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 648 -s 516
  2⤵
  - Program crash
  PID:3260

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 1592 -ip 1592
1⤵
PID:888

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 648 -ip 648
1⤵
PID:1148

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
10.4MB

MD5
f9edefbec9b86a439939d1ef0dff237f

SHA1
075fb6da0dd9a87139ccfd42b7ff6848a8ec2d3b

SHA256
8e1f91236b81edfec4160211865c19a6f4c8a0805bff7befd636fa7ac94dec0a

SHA512
f8e7444a7b8463a386e357a656abaaeb6c19b1cc76968ffe77a8d370a8aa30f69f5edca24bd4ec219dcd7b6861de06399adfb3722e4b0c089f6296ec330c4569

Download Submit
memory/648-11-0x0000000000400000-0x0000000000871000-memory.dmp

Filesize
4.4MB

Download
memory/648-17-0x0000000000400000-0x0000000000871000-memory.dmp

Filesize
4.4MB

Download
memory/648-12-0x0000000000400000-0x0000000000871000-memory.dmp

Filesize
4.4MB

Download
memory/1592-9-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download
memory/1592-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1592-1-0x0000000000B70000-0x0000000000C70000-memory.dmp

Filesize
1024KB

Download
memory/1592-8-0x0000000000400000-0x0000000000871000-memory.dmp

Filesize
4.4MB

Download
memory/1592-4-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1592-2-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download
memory/3940-15-0x0000000000DB0000-0x0000000000DC5000-memory.dmp

Filesize
84KB

Download
memory/3940-13-0x0000000000DB0000-0x0000000000DC5000-memory.dmp

Filesize
84KB

Download
memory/3940-16-0x0000000000DB0000-0x0000000000DC5000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads