tofsee | e52157c37dbd0ab18fc824ce8ddd986264d6366b6bea691624961fbfc4893b69

Analysis

max time kernel
146s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
18/08/2024, 15:59

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General

Target
a74b062af7d84cd58eb2edb84bdda27f_JaffaCakes118.exe
Size 11.6MB
Sample240818-te8hesvbkk
SHA256 e52157c37dbd0ab18fc824ce8ddd986264d6366b6bea691624961fbfc4893b69
MD5 a74b062af7d84cd58eb2edb84bdda27f
SHA1 49883834e828cf4020279c8253c4780f078dd9c9
SHA512 dedca1622ed514fa840e0f1c066c5bed9256a8112d3eba3eab82458d19da97b2c7625164179f8b6b82bdeb087d6be64b103665469a4e55dbaa3a64efd455e2b0
SSDEEP 24576:fW93OTI1/tI1/tI1/tI1/tI1/tI1/tI1/tI1/tI1/tI1/tI1/tI1/tI1/tI1/tIZ:u
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
760	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\xzhimuyk\ImagePath = "C:\\Windows\\SysWOW64\\xzhimuyk\\oirborwi.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-1-5-21-1302416131-1437503476-2806442725-1000\Control Panel\International\Geo\Nation	a74b062af7d84cd58eb2edb84bdda27f_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
1616	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1660	oirborwi.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1660 set thread context of 1616	1660	oirborwi.exe	108

Launches sc.exe 3 IoCs

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

pid	Process
1820	sc.exe
2556	sc.exe
1684	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
944	976	WerFault.exe	83
5032	1660	WerFault.exe	100

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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a74b062af7d84cd58eb2edb84bdda27f_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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	oirborwi.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 976 wrote to memory of 4204	976	a74b062af7d84cd58eb2edb84bdda27f_JaffaCakes118.exe	89
PID 976 wrote to memory of 4204	976	a74b062af7d84cd58eb2edb84bdda27f_JaffaCakes118.exe	89
PID 976 wrote to memory of 4204	976	a74b062af7d84cd58eb2edb84bdda27f_JaffaCakes118.exe	89
PID 976 wrote to memory of 3596	976	a74b062af7d84cd58eb2edb84bdda27f_JaffaCakes118.exe	91
PID 976 wrote to memory of 3596	976	a74b062af7d84cd58eb2edb84bdda27f_JaffaCakes118.exe	91
PID 976 wrote to memory of 3596	976	a74b062af7d84cd58eb2edb84bdda27f_JaffaCakes118.exe	91
PID 976 wrote to memory of 1820	976	a74b062af7d84cd58eb2edb84bdda27f_JaffaCakes118.exe	93
PID 976 wrote to memory of 1820	976	a74b062af7d84cd58eb2edb84bdda27f_JaffaCakes118.exe	93
PID 976 wrote to memory of 1820	976	a74b062af7d84cd58eb2edb84bdda27f_JaffaCakes118.exe	93
PID 976 wrote to memory of 2556	976	a74b062af7d84cd58eb2edb84bdda27f_JaffaCakes118.exe	96
PID 976 wrote to memory of 2556	976	a74b062af7d84cd58eb2edb84bdda27f_JaffaCakes118.exe	96
PID 976 wrote to memory of 2556	976	a74b062af7d84cd58eb2edb84bdda27f_JaffaCakes118.exe	96
PID 976 wrote to memory of 1684	976	a74b062af7d84cd58eb2edb84bdda27f_JaffaCakes118.exe	98
PID 976 wrote to memory of 1684	976	a74b062af7d84cd58eb2edb84bdda27f_JaffaCakes118.exe	98
PID 976 wrote to memory of 1684	976	a74b062af7d84cd58eb2edb84bdda27f_JaffaCakes118.exe	98
PID 976 wrote to memory of 760	976	a74b062af7d84cd58eb2edb84bdda27f_JaffaCakes118.exe	101
PID 976 wrote to memory of 760	976	a74b062af7d84cd58eb2edb84bdda27f_JaffaCakes118.exe	101
PID 976 wrote to memory of 760	976	a74b062af7d84cd58eb2edb84bdda27f_JaffaCakes118.exe	101
PID 1660 wrote to memory of 1616	1660	oirborwi.exe	108
PID 1660 wrote to memory of 1616	1660	oirborwi.exe	108
PID 1660 wrote to memory of 1616	1660	oirborwi.exe	108
PID 1660 wrote to memory of 1616	1660	oirborwi.exe	108
PID 1660 wrote to memory of 1616	1660	oirborwi.exe	108

C:\Users\Admin\AppData\Local\Temp\a74b062af7d84cd58eb2edb84bdda27f_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\a74b062af7d84cd58eb2edb84bdda27f_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:976
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\xzhimuyk\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4204
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\oirborwi.exe" C:\Windows\SysWOW64\xzhimuyk\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3596
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create xzhimuyk binPath= "C:\Windows\SysWOW64\xzhimuyk\oirborwi.exe /d\"C:\Users\Admin\AppData\Local\Temp\a74b062af7d84cd58eb2edb84bdda27f_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1820
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description xzhimuyk "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2556
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start xzhimuyk
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1684
- 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:760
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 976 -s 572
  2⤵
  - Program crash
  PID:944

C:\Windows\SysWOW64\xzhimuyk\oirborwi.exe
C:\Windows\SysWOW64\xzhimuyk\oirborwi.exe /d"C:\Users\Admin\AppData\Local\Temp\a74b062af7d84cd58eb2edb84bdda27f_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1660
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:1616
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1660 -s 556
  2⤵
  - Program crash
  PID:5032

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 976 -ip 976
1⤵
PID:1700

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 540 -p 1660 -ip 1660
1⤵
PID:672

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

oirborwi.exe

Path C:\Users\Admin\AppData\Local\Temp\oirborwi.exe
Size 13.9MB
SHA256 e723801692c54c9461b6dcce9c5816912c11ee4316b248c44c1915f69b69a3fb
MD5 06e64ca5dcd056f9623a2d3c74f26c0f
SHA1 9451757b4d5184d954892b51b74524bf1806f5b9
SHA512 45bfc7402b2e46343b04557edcb395739ce4b1c2adbd9b393eeba0ea3a140ab7f5bc9cd4aa01b76b3ddb68406bc12a8469bedfc190e784851971d249bd4a077a
SSDEEP 24576:GW93OTI1/tI1/tI1/tI1/tI1/tI1/tI1/tI1/tI1/tI1/tI1/tI1/tI1/tI1/tIU:j
MD5 SHA1 SHA512 SSDEEP

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memory/976-9-0x0000000002190000-0x00000000021A3000-memory.dmp

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memory/976-3-0x0000000000400000-0x0000000000415000-memory.dmp

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memory/976-2-0x0000000002190000-0x00000000021A3000-memory.dmp

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memory/976-8-0x0000000000400000-0x000000000043E000-memory.dmp

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memory/976-10-0x0000000000400000-0x0000000000415000-memory.dmp

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memory/976-1-0x00000000005E0000-0x00000000006E0000-memory.dmp

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memory/1616-14-0x0000000001080000-0x0000000001095000-memory.dmp

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memory/1616-16-0x0000000001080000-0x0000000001095000-memory.dmp

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memory/1616-17-0x0000000001080000-0x0000000001095000-memory.dmp

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memory/1660-12-0x0000000000400000-0x000000000043E000-memory.dmp

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memory/1660-11-0x0000000000400000-0x000000000043E000-memory.dmp

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memory/1660-13-0x0000000000400000-0x000000000043E000-memory.dmp

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memory/1660-18-0x0000000000400000-0x000000000043E000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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