tofsee | 17c8e089ef56e32ac844760c25000893f39816928a17758bb9ebef6b253ddf9c

Analysis

max time kernel
147s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
30/09/2024, 18:10

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General

Target
02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.exe
Size 238KB
Sample240930-wr668ssfjc
SHA256 17c8e089ef56e32ac844760c25000893f39816928a17758bb9ebef6b253ddf9c
MD5 02a4be2bb32a8c16aeccc58a036fb973
SHA1 108b94317a15d4b268130d3028e46b66ed82ae07
SHA512 56ca2e2b277f6a4a9c4d8d143efa9086d1f08caa4a61dddd5268b8cf0aba49862d9d36c285aacef89980e9a0a21e70ed5672210f1bd51f555334be4388bebf3a
SSDEEP 6144:xeaRFeYiZtnsLs/Xyihb124uKPoifbY/3sGIU5N5:xF7/iZtRXpu3ijwf5T
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

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
3476	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\jpmmvuxc\ImagePath = "C:\\Windows\\SysWOW64\\jpmmvuxc\\cjmkllbp.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-1-5-21-656926755-4116854191-210765258-1000\Control Panel\International\Geo\Nation	02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
712	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3820	cjmkllbp.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3820 set thread context of 712	3820	cjmkllbp.exe	98

Launches sc.exe 3 IoCs

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

pid	Process
4960	sc.exe
4704	sc.exe
4836	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
1608	4552	WerFault.exe	81
1592	3820	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	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	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cjmkllbp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4552 wrote to memory of 1680	4552	02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.exe	82
PID 4552 wrote to memory of 1680	4552	02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.exe	82
PID 4552 wrote to memory of 1680	4552	02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.exe	82
PID 4552 wrote to memory of 3352	4552	02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.exe	84
PID 4552 wrote to memory of 3352	4552	02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.exe	84
PID 4552 wrote to memory of 3352	4552	02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.exe	84
PID 4552 wrote to memory of 4960	4552	02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.exe	86
PID 4552 wrote to memory of 4960	4552	02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.exe	86
PID 4552 wrote to memory of 4960	4552	02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.exe	86
PID 4552 wrote to memory of 4704	4552	02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.exe	88
PID 4552 wrote to memory of 4704	4552	02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.exe	88
PID 4552 wrote to memory of 4704	4552	02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.exe	88
PID 4552 wrote to memory of 4836	4552	02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.exe	90
PID 4552 wrote to memory of 4836	4552	02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.exe	90
PID 4552 wrote to memory of 4836	4552	02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.exe	90
PID 4552 wrote to memory of 3476	4552	02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.exe	93
PID 4552 wrote to memory of 3476	4552	02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.exe	93
PID 4552 wrote to memory of 3476	4552	02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.exe	93
PID 3820 wrote to memory of 712	3820	cjmkllbp.exe	98
PID 3820 wrote to memory of 712	3820	cjmkllbp.exe	98
PID 3820 wrote to memory of 712	3820	cjmkllbp.exe	98
PID 3820 wrote to memory of 712	3820	cjmkllbp.exe	98
PID 3820 wrote to memory of 712	3820	cjmkllbp.exe	98

C:\Users\Admin\AppData\Local\Temp\02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4552
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\jpmmvuxc\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1680
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\cjmkllbp.exe" C:\Windows\SysWOW64\jpmmvuxc\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3352
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create jpmmvuxc binPath= "C:\Windows\SysWOW64\jpmmvuxc\cjmkllbp.exe /d\"C:\Users\Admin\AppData\Local\Temp\02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4960
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description jpmmvuxc "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4704
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start jpmmvuxc
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4836
- 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:3476
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4552 -s 1228
  2⤵
  - Program crash
  PID:1608

C:\Windows\SysWOW64\jpmmvuxc\cjmkllbp.exe
C:\Windows\SysWOW64\jpmmvuxc\cjmkllbp.exe /d"C:\Users\Admin\AppData\Local\Temp\02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3820
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:712
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3820 -s 516
  2⤵
  - Program crash
  PID:1592

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 4552 -ip 4552
1⤵
PID:4576

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 3820 -ip 3820
1⤵
PID:2436

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

T1569

Service Execution

T1569.002

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Defense Evasion

Impair Defenses

T1562

Disable or Modify System Firewall

T1562.004

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

cjmkllbp.exe

Path C:\Users\Admin\AppData\Local\Temp\cjmkllbp.exe
Size 10.9MB
SHA256 d04428331cd26f49b6c273b3e940896d765530ee39ec22bfae109494074152b0
MD5 a5885a3584a6d7147f9dccfb47cb5a9a
SHA1 88dfba81fb75e3e66de751fde1b763036067600d
SHA512 d2958d25bbc12f5663fb8c7c3471167c93e5cf2d378840c78952f24df65ba9996706bbbfd8dd199b68ac8b75aabb24e5f181f32b2c980a3afc84936a8bfc4675
SSDEEP 6144:keaRFeYiZtnsLs/Xyihb124uKPoifbY/3sGIU5N5:kF7/iZtRXpu3ijwf5T
MD5 SHA1 SHA512 SSDEEP

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memory/712-12-0x0000000001030000-0x0000000001045000-memory.dmp

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memory/712-17-0x0000000001030000-0x0000000001045000-memory.dmp

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memory/712-14-0x0000000001030000-0x0000000001045000-memory.dmp

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memory/3820-15-0x0000000000400000-0x000000000086B000-memory.dmp

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memory/3820-11-0x0000000000400000-0x000000000086B000-memory.dmp

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memory/3820-16-0x0000000000400000-0x000000000086B000-memory.dmp

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memory/3820-19-0x0000000000400000-0x000000000086B000-memory.dmp

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memory/4552-9-0x00000000001E0000-0x00000000001F3000-memory.dmp

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memory/4552-8-0x0000000000400000-0x000000000086B000-memory.dmp

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memory/4552-10-0x0000000000400000-0x0000000000415000-memory.dmp

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memory/4552-1-0x00000000009D0000-0x0000000000AD0000-memory.dmp

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memory/4552-3-0x0000000000400000-0x0000000000415000-memory.dmp

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memory/4552-2-0x00000000001E0000-0x00000000001F3000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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