tofsee | 7161a89ba677dbc3bfc774b6c8fe28cbbb8ce7edb4b8198d85fc6e1c9d855096

Analysis

max time kernel
149s
max time network
144s
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, 02:33

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General

Target
813c8875152bcea613c348f63b5d0077_JaffaCakes118.exe
Size 12.0MB
Sample240402-c1wmbaee89
SHA256 7161a89ba677dbc3bfc774b6c8fe28cbbb8ce7edb4b8198d85fc6e1c9d855096
MD5 813c8875152bcea613c348f63b5d0077
SHA1 adfb16d1f34fc2551605f668afcfe6fdc8ea01fe
SHA512 d793042a1cc39406325416431f1701e7c9069f5ce89e75db129aeb827ede04eea2ff0278f6429bdcdbfce3e472fbe9629450cb1ff70cd5b11947107a6403484a
SSDEEP 49152:LyzapZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZN:LC
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

quadoil.ru
lakeflex.ru

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
4240	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\uvaebizr\ImagePath = "C:\\Windows\\SysWOW64\\uvaebizr\\zotuowzs.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-1-5-21-3270530367-132075249-2153716227-1000\Control Panel\International\Geo\Nation	813c8875152bcea613c348f63b5d0077_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
3148	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4916	zotuowzs.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4916 set thread context of 3148	4916	zotuowzs.exe	109

Launches sc.exe 3 IoCs

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

pid	Process
4872	sc.exe
5000	sc.exe
5044	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
4232	540	WerFault.exe	85
1816	4916	WerFault.exe	102

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 540 wrote to memory of 3812	540	813c8875152bcea613c348f63b5d0077_JaffaCakes118.exe	89
PID 540 wrote to memory of 3812	540	813c8875152bcea613c348f63b5d0077_JaffaCakes118.exe	89
PID 540 wrote to memory of 3812	540	813c8875152bcea613c348f63b5d0077_JaffaCakes118.exe	89
PID 540 wrote to memory of 4352	540	813c8875152bcea613c348f63b5d0077_JaffaCakes118.exe	91
PID 540 wrote to memory of 4352	540	813c8875152bcea613c348f63b5d0077_JaffaCakes118.exe	91
PID 540 wrote to memory of 4352	540	813c8875152bcea613c348f63b5d0077_JaffaCakes118.exe	91
PID 540 wrote to memory of 5044	540	813c8875152bcea613c348f63b5d0077_JaffaCakes118.exe	93
PID 540 wrote to memory of 5044	540	813c8875152bcea613c348f63b5d0077_JaffaCakes118.exe	93
PID 540 wrote to memory of 5044	540	813c8875152bcea613c348f63b5d0077_JaffaCakes118.exe	93
PID 540 wrote to memory of 4872	540	813c8875152bcea613c348f63b5d0077_JaffaCakes118.exe	97
PID 540 wrote to memory of 4872	540	813c8875152bcea613c348f63b5d0077_JaffaCakes118.exe	97
PID 540 wrote to memory of 4872	540	813c8875152bcea613c348f63b5d0077_JaffaCakes118.exe	97
PID 540 wrote to memory of 5000	540	813c8875152bcea613c348f63b5d0077_JaffaCakes118.exe	99
PID 540 wrote to memory of 5000	540	813c8875152bcea613c348f63b5d0077_JaffaCakes118.exe	99
PID 540 wrote to memory of 5000	540	813c8875152bcea613c348f63b5d0077_JaffaCakes118.exe	99
PID 540 wrote to memory of 4240	540	813c8875152bcea613c348f63b5d0077_JaffaCakes118.exe	104
PID 540 wrote to memory of 4240	540	813c8875152bcea613c348f63b5d0077_JaffaCakes118.exe	104
PID 540 wrote to memory of 4240	540	813c8875152bcea613c348f63b5d0077_JaffaCakes118.exe	104
PID 4916 wrote to memory of 3148	4916	zotuowzs.exe	109
PID 4916 wrote to memory of 3148	4916	zotuowzs.exe	109
PID 4916 wrote to memory of 3148	4916	zotuowzs.exe	109
PID 4916 wrote to memory of 3148	4916	zotuowzs.exe	109
PID 4916 wrote to memory of 3148	4916	zotuowzs.exe	109

C:\Users\Admin\AppData\Local\Temp\813c8875152bcea613c348f63b5d0077_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\813c8875152bcea613c348f63b5d0077_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:540
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\uvaebizr\
  2⤵
  PID:3812
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\zotuowzs.exe" C:\Windows\SysWOW64\uvaebizr\
  2⤵
  PID:4352
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create uvaebizr binPath= "C:\Windows\SysWOW64\uvaebizr\zotuowzs.exe /d\"C:\Users\Admin\AppData\Local\Temp\813c8875152bcea613c348f63b5d0077_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:5044
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description uvaebizr "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:4872
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start uvaebizr
  2⤵
  - Launches sc.exe
  PID:5000
- 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:4240
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 540 -s 1236
  2⤵
  - Program crash
  PID:4232

C:\Windows\SysWOW64\uvaebizr\zotuowzs.exe
C:\Windows\SysWOW64\uvaebizr\zotuowzs.exe /d"C:\Users\Admin\AppData\Local\Temp\813c8875152bcea613c348f63b5d0077_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4916
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:3148
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4916 -s 560
  2⤵
  - Program crash
  PID:1816

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 540 -ip 540
1⤵
PID:3144

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 556 -p 4916 -ip 4916
1⤵
PID:900

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

zotuowzs.exe

Path C:\Users\Admin\AppData\Local\Temp\zotuowzs.exe
Size 13.3MB
SHA256 85cffe01745efd022cbbfe557226eb34fe758939c01ef3af387c704a1b2f01bf
MD5 8f021a7f24ec51464c19414e73b54091
SHA1 b8452003a31cff4c132a6bc2116a834ceddd8c76
SHA512 748bfa4733c2ebe28afc6263fc67e023381189e8fb76ed82acfa9a9c4a54092521d302e298ccb6ff8008387dd958133542697512d2a3e803831bc3eb36f674ec
SSDEEP 49152:yyzapZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZr:yC
MD5 SHA1 SHA512 SSDEEP

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memory/540-1-0x00000000016D0000-0x00000000017D0000-memory.dmp

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memory/540-2-0x0000000003400000-0x0000000003413000-memory.dmp

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memory/540-4-0x0000000000400000-0x00000000016BD000-memory.dmp

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memory/540-8-0x0000000000400000-0x00000000016BD000-memory.dmp

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memory/540-9-0x0000000003400000-0x0000000003413000-memory.dmp

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memory/3148-15-0x0000000000A70000-0x0000000000A85000-memory.dmp

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memory/3148-11-0x0000000000A70000-0x0000000000A85000-memory.dmp

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memory/3148-16-0x0000000000A70000-0x0000000000A85000-memory.dmp

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memory/3148-17-0x0000000000A70000-0x0000000000A85000-memory.dmp

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memory/3148-19-0x0000000000A70000-0x0000000000A85000-memory.dmp

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memory/4916-13-0x0000000000400000-0x00000000016BD000-memory.dmp

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memory/4916-10-0x0000000001A50000-0x0000000001B50000-memory.dmp

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memory/4916-18-0x0000000000400000-0x00000000016BD000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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