tofsee | a1661500b108adc16b7016f26353aa6dc0bd166694245a7cbb18d477c25cbc1f

Analysis

max time kernel
145s
max time network
122s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
30-09-2024 16:15

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General

Target

023aa226acf2890e914227dab936988c_JaffaCakes118.exe
Size

11.8MB
MD5

023aa226acf2890e914227dab936988c
SHA1

93d78f4bb8d0d12f3390b8d6c2643da373d80bc4
SHA256

a1661500b108adc16b7016f26353aa6dc0bd166694245a7cbb18d477c25cbc1f
SHA512

a492c3fd3e733822468908de6b75894c8cb7794796719c95593a3f9f0d1a33e14d4a8c35e29671f6b95d635cd9c1ea4ead1c1e52902859ab1e65c3f72eef79c9
SSDEEP

6144:Wvk9RADRUv1CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC6:/RAD

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

43.231.4.7

lazystax.ru

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee

Windows security bypass 2 TTPs 1 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\SysWOW64\oumjbdbn = "0"	svchost.exe

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
2816	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\oumjbdbn\ImagePath = "C:\\Windows\\SysWOW64\\oumjbdbn\\younowmv.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2916	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2840	younowmv.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2840 set thread context of 2916	2840	younowmv.exe	41

Launches sc.exe 3 IoCs

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

pid	Process
2500	sc.exe
3044	sc.exe
2768	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 value enumerated	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh	netsh.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh	netsh.exe
Key queried	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh	netsh.exe

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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	023aa226acf2890e914227dab936988c_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	younowmv.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2004 wrote to memory of 1796	2004	023aa226acf2890e914227dab936988c_JaffaCakes118.exe	30
PID 2004 wrote to memory of 1796	2004	023aa226acf2890e914227dab936988c_JaffaCakes118.exe	30
PID 2004 wrote to memory of 1796	2004	023aa226acf2890e914227dab936988c_JaffaCakes118.exe	30
PID 2004 wrote to memory of 1796	2004	023aa226acf2890e914227dab936988c_JaffaCakes118.exe	30
PID 2004 wrote to memory of 2924	2004	023aa226acf2890e914227dab936988c_JaffaCakes118.exe	32
PID 2004 wrote to memory of 2924	2004	023aa226acf2890e914227dab936988c_JaffaCakes118.exe	32
PID 2004 wrote to memory of 2924	2004	023aa226acf2890e914227dab936988c_JaffaCakes118.exe	32
PID 2004 wrote to memory of 2924	2004	023aa226acf2890e914227dab936988c_JaffaCakes118.exe	32
PID 2004 wrote to memory of 2500	2004	023aa226acf2890e914227dab936988c_JaffaCakes118.exe	34
PID 2004 wrote to memory of 2500	2004	023aa226acf2890e914227dab936988c_JaffaCakes118.exe	34
PID 2004 wrote to memory of 2500	2004	023aa226acf2890e914227dab936988c_JaffaCakes118.exe	34
PID 2004 wrote to memory of 2500	2004	023aa226acf2890e914227dab936988c_JaffaCakes118.exe	34
PID 2004 wrote to memory of 3044	2004	023aa226acf2890e914227dab936988c_JaffaCakes118.exe	36
PID 2004 wrote to memory of 3044	2004	023aa226acf2890e914227dab936988c_JaffaCakes118.exe	36
PID 2004 wrote to memory of 3044	2004	023aa226acf2890e914227dab936988c_JaffaCakes118.exe	36
PID 2004 wrote to memory of 3044	2004	023aa226acf2890e914227dab936988c_JaffaCakes118.exe	36
PID 2004 wrote to memory of 2768	2004	023aa226acf2890e914227dab936988c_JaffaCakes118.exe	38
PID 2004 wrote to memory of 2768	2004	023aa226acf2890e914227dab936988c_JaffaCakes118.exe	38
PID 2004 wrote to memory of 2768	2004	023aa226acf2890e914227dab936988c_JaffaCakes118.exe	38
PID 2004 wrote to memory of 2768	2004	023aa226acf2890e914227dab936988c_JaffaCakes118.exe	38
PID 2840 wrote to memory of 2916	2840	younowmv.exe	41
PID 2840 wrote to memory of 2916	2840	younowmv.exe	41
PID 2840 wrote to memory of 2916	2840	younowmv.exe	41
PID 2840 wrote to memory of 2916	2840	younowmv.exe	41
PID 2840 wrote to memory of 2916	2840	younowmv.exe	41
PID 2840 wrote to memory of 2916	2840	younowmv.exe	41
PID 2004 wrote to memory of 2816	2004	023aa226acf2890e914227dab936988c_JaffaCakes118.exe	42
PID 2004 wrote to memory of 2816	2004	023aa226acf2890e914227dab936988c_JaffaCakes118.exe	42
PID 2004 wrote to memory of 2816	2004	023aa226acf2890e914227dab936988c_JaffaCakes118.exe	42
PID 2004 wrote to memory of 2816	2004	023aa226acf2890e914227dab936988c_JaffaCakes118.exe	42

C:\Users\Admin\AppData\Local\Temp\023aa226acf2890e914227dab936988c_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\023aa226acf2890e914227dab936988c_JaffaCakes118.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2004
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\oumjbdbn\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1796
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\younowmv.exe" C:\Windows\SysWOW64\oumjbdbn\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2924
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create oumjbdbn binPath= "C:\Windows\SysWOW64\oumjbdbn\younowmv.exe /d\"C:\Users\Admin\AppData\Local\Temp\023aa226acf2890e914227dab936988c_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2500
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description oumjbdbn "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3044
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start oumjbdbn
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2768
- 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:2816

C:\Windows\SysWOW64\oumjbdbn\younowmv.exe
C:\Windows\SysWOW64\oumjbdbn\younowmv.exe /d"C:\Users\Admin\AppData\Local\Temp\023aa226acf2890e914227dab936988c_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2840
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Windows security bypass
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2916

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

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Credential Access

Discovery

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

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

Filesize
12.5MB

MD5
23acc14d6dc45471e1ffb5955a5d768f

SHA1
0cba9697eebec21dbc5790491dfe9bfc1d30e94b

SHA256
23a8de236ec5ba28b3923eb541788e35573cdc1ccf18132b0b0295c5c2e7ebd6

SHA512
28e88bc978dec801d2c8dc34759e99fe98d73edb00d7eb0c108cf611333d335ce3b32bed07f62dc82e05671cd5ca43950684edfb270808bbdc6908157a571c08

Download Submit
memory/2004-2-0x00000000001F0000-0x00000000001F1000-memory.dmp

Filesize
4KB

Download
memory/2004-1-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2004-0-0x00000000001E0000-0x00000000001E1000-memory.dmp

Filesize
4KB

Download
memory/2004-13-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2840-12-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2916-10-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2916-9-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2916-7-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2916-14-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2916-15-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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