tofsee | f7e835897ed3701bdfdb7f8284786bdd12b11ba1090088806717b7a1490fdb7d

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
02/04/2024, 05:43

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General

Target
853bc55f40fce72bc106afcecec813ed_JaffaCakes118.exe
Size 11.7MB
Sample240402-gepn4aad87
SHA256 f7e835897ed3701bdfdb7f8284786bdd12b11ba1090088806717b7a1490fdb7d
MD5 853bc55f40fce72bc106afcecec813ed
SHA1 4140b06fa9af6caca5f8b5f357ac16922f256121
SHA512 d726533601245163c0a73a6bb75ef9e12feeb4d33e54021a188c5f56ca217f6d0368ea1f866cb1be491bbc9c1450de663437fe3c4593018dfb4001c01e312536
SSDEEP 12288:Z/1FGiuyrsP8dV3pUkzFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFl:Z/GUrlZUk
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

tofsee evasion persistence 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) 1 TTPs
persistence

Windows Service
T1543.003

Modifies Windows Firewall 2 TTPs 1 IoCs

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
1160	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\xbbcxaer\ImagePath = "C:\\Windows\\SysWOW64\\xbbcxaer\\nsogeht.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-1-5-21-983155329-280873152-1838004294-1000\Control Panel\International\Geo\Nation	853bc55f40fce72bc106afcecec813ed_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
3704	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2104	nsogeht.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2104 set thread context of 3704	2104	nsogeht.exe	107

Launches sc.exe 3 IoCs

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

pid	Process
2224	sc.exe
1936	sc.exe
3608	sc.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 2 IoCs

pid	pid_target	Process	procid_target
1440	2964	WerFault.exe	84
1600	2104	WerFault.exe	100

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2964 wrote to memory of 1948	2964	853bc55f40fce72bc106afcecec813ed_JaffaCakes118.exe	88
PID 2964 wrote to memory of 1948	2964	853bc55f40fce72bc106afcecec813ed_JaffaCakes118.exe	88
PID 2964 wrote to memory of 1948	2964	853bc55f40fce72bc106afcecec813ed_JaffaCakes118.exe	88
PID 2964 wrote to memory of 1460	2964	853bc55f40fce72bc106afcecec813ed_JaffaCakes118.exe	90
PID 2964 wrote to memory of 1460	2964	853bc55f40fce72bc106afcecec813ed_JaffaCakes118.exe	90
PID 2964 wrote to memory of 1460	2964	853bc55f40fce72bc106afcecec813ed_JaffaCakes118.exe	90
PID 2964 wrote to memory of 2224	2964	853bc55f40fce72bc106afcecec813ed_JaffaCakes118.exe	92
PID 2964 wrote to memory of 2224	2964	853bc55f40fce72bc106afcecec813ed_JaffaCakes118.exe	92
PID 2964 wrote to memory of 2224	2964	853bc55f40fce72bc106afcecec813ed_JaffaCakes118.exe	92
PID 2964 wrote to memory of 1936	2964	853bc55f40fce72bc106afcecec813ed_JaffaCakes118.exe	94
PID 2964 wrote to memory of 1936	2964	853bc55f40fce72bc106afcecec813ed_JaffaCakes118.exe	94
PID 2964 wrote to memory of 1936	2964	853bc55f40fce72bc106afcecec813ed_JaffaCakes118.exe	94
PID 2964 wrote to memory of 3608	2964	853bc55f40fce72bc106afcecec813ed_JaffaCakes118.exe	98
PID 2964 wrote to memory of 3608	2964	853bc55f40fce72bc106afcecec813ed_JaffaCakes118.exe	98
PID 2964 wrote to memory of 3608	2964	853bc55f40fce72bc106afcecec813ed_JaffaCakes118.exe	98
PID 2964 wrote to memory of 1160	2964	853bc55f40fce72bc106afcecec813ed_JaffaCakes118.exe	101
PID 2964 wrote to memory of 1160	2964	853bc55f40fce72bc106afcecec813ed_JaffaCakes118.exe	101
PID 2964 wrote to memory of 1160	2964	853bc55f40fce72bc106afcecec813ed_JaffaCakes118.exe	101
PID 2104 wrote to memory of 3704	2104	nsogeht.exe	107
PID 2104 wrote to memory of 3704	2104	nsogeht.exe	107
PID 2104 wrote to memory of 3704	2104	nsogeht.exe	107
PID 2104 wrote to memory of 3704	2104	nsogeht.exe	107
PID 2104 wrote to memory of 3704	2104	nsogeht.exe	107

C:\Users\Admin\AppData\Local\Temp\853bc55f40fce72bc106afcecec813ed_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\853bc55f40fce72bc106afcecec813ed_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2964
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\xbbcxaer\
  2⤵
  PID:1948
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\nsogeht.exe" C:\Windows\SysWOW64\xbbcxaer\
  2⤵
  PID:1460
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create xbbcxaer binPath= "C:\Windows\SysWOW64\xbbcxaer\nsogeht.exe /d\"C:\Users\Admin\AppData\Local\Temp\853bc55f40fce72bc106afcecec813ed_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:2224
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description xbbcxaer "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:1936
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start xbbcxaer
  2⤵
  - Launches sc.exe
  PID:3608
- 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
  PID:1160
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2964 -s 596
  2⤵
  - Program crash
  PID:1440

C:\Windows\SysWOW64\xbbcxaer\nsogeht.exe
C:\Windows\SysWOW64\xbbcxaer\nsogeht.exe /d"C:\Users\Admin\AppData\Local\Temp\853bc55f40fce72bc106afcecec813ed_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2104
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:3704
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2104 -s 508
  2⤵
  - Program crash
  PID:1600

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 2964 -ip 2964
1⤵
PID:2832

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 2104 -ip 2104
1⤵
PID:4636

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

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

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

nsogeht.exe

Path C:\Users\Admin\AppData\Local\Temp\nsogeht.exe
Size 12.4MB
SHA256 ef6d3b01cd80b20d94055eef9e404eec0bfa442b92d36bcfd4f9fd7d5c179bcf
MD5 d8a93ce4fbbbe0a820e7b30d36c739a6
SHA1 c0b058df2457c11daf803bcf2e9ea926056dafc0
SHA512 41d9bac868fa9459a792701bcb27ea58cb83a7842b42441bc706c46b4567a2e43bdf54d7c3fa10b1aa8182ad7383b2ff14a978d87cd7a695de753f000244b447
SSDEEP 12288:N/1FGiuyrsP8dV3pUkzFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFl:N/GUrlZUk
MD5 SHA1 SHA512 SSDEEP

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memory/2104-10-0x0000000000670000-0x0000000000770000-memory.dmp

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memory/2104-12-0x0000000000400000-0x0000000000454000-memory.dmp

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memory/2104-17-0x0000000000400000-0x0000000000454000-memory.dmp

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memory/2964-3-0x0000000000400000-0x0000000000454000-memory.dmp

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memory/2964-2-0x0000000000690000-0x00000000006A3000-memory.dmp

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memory/2964-8-0x0000000000400000-0x0000000000454000-memory.dmp

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memory/2964-9-0x0000000000690000-0x00000000006A3000-memory.dmp

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memory/2964-1-0x00000000006D0000-0x00000000007D0000-memory.dmp

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memory/3704-11-0x00000000010D0000-0x00000000010E5000-memory.dmp

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memory/3704-15-0x00000000010D0000-0x00000000010E5000-memory.dmp

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memory/3704-16-0x00000000010D0000-0x00000000010E5000-memory.dmp

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memory/3704-18-0x00000000010D0000-0x00000000010E5000-memory.dmp

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memory/3704-19-0x00000000010D0000-0x00000000010E5000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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