tofsee | 7567845d1f6798d471c6d9ea479b6c7c1a59540e3e6dbf150b3624cb0afc1caa

Analysis

max time kernel
150s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
31/03/2024, 14:44

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General

Target
574ae27407a29872371c16b4d51fc07c_JaffaCakes118.exe
Size 12.6MB
Sample240331-r4lnvaec43
SHA256 7567845d1f6798d471c6d9ea479b6c7c1a59540e3e6dbf150b3624cb0afc1caa
MD5 574ae27407a29872371c16b4d51fc07c
SHA1 d4c6d82d9c55553c8d855fea370c69d7c8163f36
SHA512 4cfc537197aa4a682470792902f3dc72f5d8a51d2ae49386e9acab34b93e16ad50932c22fd0616ff1bad8740102bf93922bda4c157afd39e3ca44a2230ec9129
SSDEEP 12288:zZuQ8KeZy8QXVeciP1m11111111111111111111111111111111111111111111n:z0Q8wVPk
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
1348	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\zwmbzrbu\ImagePath = "C:\\Windows\\SysWOW64\\zwmbzrbu\\xaytnueo.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-1-5-21-609813121-2907144057-1731107329-1000\Control Panel\International\Geo\Nation	574ae27407a29872371c16b4d51fc07c_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
3196	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4212	xaytnueo.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4212 set thread context of 3196	4212	xaytnueo.exe	105

Launches sc.exe 3 IoCs

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

pid	Process
1212	sc.exe
3284	sc.exe
4456	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
2864	4856	WerFault.exe	84
3620	4212	WerFault.exe	98

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4856 wrote to memory of 2776	4856	574ae27407a29872371c16b4d51fc07c_JaffaCakes118.exe	88
PID 4856 wrote to memory of 2776	4856	574ae27407a29872371c16b4d51fc07c_JaffaCakes118.exe	88
PID 4856 wrote to memory of 2776	4856	574ae27407a29872371c16b4d51fc07c_JaffaCakes118.exe	88
PID 4856 wrote to memory of 3100	4856	574ae27407a29872371c16b4d51fc07c_JaffaCakes118.exe	90
PID 4856 wrote to memory of 3100	4856	574ae27407a29872371c16b4d51fc07c_JaffaCakes118.exe	90
PID 4856 wrote to memory of 3100	4856	574ae27407a29872371c16b4d51fc07c_JaffaCakes118.exe	90
PID 4856 wrote to memory of 1212	4856	574ae27407a29872371c16b4d51fc07c_JaffaCakes118.exe	92
PID 4856 wrote to memory of 1212	4856	574ae27407a29872371c16b4d51fc07c_JaffaCakes118.exe	92
PID 4856 wrote to memory of 1212	4856	574ae27407a29872371c16b4d51fc07c_JaffaCakes118.exe	92
PID 4856 wrote to memory of 3284	4856	574ae27407a29872371c16b4d51fc07c_JaffaCakes118.exe	94
PID 4856 wrote to memory of 3284	4856	574ae27407a29872371c16b4d51fc07c_JaffaCakes118.exe	94
PID 4856 wrote to memory of 3284	4856	574ae27407a29872371c16b4d51fc07c_JaffaCakes118.exe	94
PID 4856 wrote to memory of 4456	4856	574ae27407a29872371c16b4d51fc07c_JaffaCakes118.exe	96
PID 4856 wrote to memory of 4456	4856	574ae27407a29872371c16b4d51fc07c_JaffaCakes118.exe	96
PID 4856 wrote to memory of 4456	4856	574ae27407a29872371c16b4d51fc07c_JaffaCakes118.exe	96
PID 4856 wrote to memory of 1348	4856	574ae27407a29872371c16b4d51fc07c_JaffaCakes118.exe	101
PID 4856 wrote to memory of 1348	4856	574ae27407a29872371c16b4d51fc07c_JaffaCakes118.exe	101
PID 4856 wrote to memory of 1348	4856	574ae27407a29872371c16b4d51fc07c_JaffaCakes118.exe	101
PID 4212 wrote to memory of 3196	4212	xaytnueo.exe	105
PID 4212 wrote to memory of 3196	4212	xaytnueo.exe	105
PID 4212 wrote to memory of 3196	4212	xaytnueo.exe	105
PID 4212 wrote to memory of 3196	4212	xaytnueo.exe	105
PID 4212 wrote to memory of 3196	4212	xaytnueo.exe	105

C:\Users\Admin\AppData\Local\Temp\574ae27407a29872371c16b4d51fc07c_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\574ae27407a29872371c16b4d51fc07c_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4856
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\zwmbzrbu\
  2⤵
  PID:2776
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\xaytnueo.exe" C:\Windows\SysWOW64\zwmbzrbu\
  2⤵
  PID:3100
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create zwmbzrbu binPath= "C:\Windows\SysWOW64\zwmbzrbu\xaytnueo.exe /d\"C:\Users\Admin\AppData\Local\Temp\574ae27407a29872371c16b4d51fc07c_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:1212
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description zwmbzrbu "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:3284
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start zwmbzrbu
  2⤵
  - Launches sc.exe
  PID:4456
- 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:1348
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4856 -s 644
  2⤵
  - Program crash
  PID:2864

C:\Windows\SysWOW64\zwmbzrbu\xaytnueo.exe
C:\Windows\SysWOW64\zwmbzrbu\xaytnueo.exe /d"C:\Users\Admin\AppData\Local\Temp\574ae27407a29872371c16b4d51fc07c_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4212
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:3196
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4212 -s 548
  2⤵
  - Program crash
  PID:3620

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 4856 -ip 4856
1⤵
PID:2772

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 4212 -ip 4212
1⤵
PID:4688

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

xaytnueo.exe

Path C:\Users\Admin\AppData\Local\Temp\xaytnueo.exe
Size 14.2MB
SHA256 516b01a6595d484b907b8618801042c125f477fe8815b46b4979e9f1a2ec19b3
MD5 9650bd0cbf2d210a32b338f649dc2cb3
SHA1 a0e7a074a871575fa740825b1d5e369d449410e6
SHA512 e009a4f640635c96287982dfa9eeeb38144d1d9150ecd97a6d8e022e5d6b19ea765b316b663f7347297ab050f761b70300f64b802065a3ba5b22188537127c02
SSDEEP 12288:YZuQ8KeZy8QXVeciP1m11111111111111111111111111111111111111111111V:Y0Q8wVPk
MD5 SHA1 SHA512 SSDEEP

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memory/3196-11-0x0000000000550000-0x0000000000565000-memory.dmp

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memory/3196-19-0x0000000000550000-0x0000000000565000-memory.dmp

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memory/3196-18-0x0000000000550000-0x0000000000565000-memory.dmp

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memory/3196-17-0x0000000000550000-0x0000000000565000-memory.dmp

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memory/3196-14-0x0000000000550000-0x0000000000565000-memory.dmp

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memory/4212-10-0x0000000000400000-0x000000000044D000-memory.dmp

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memory/4212-9-0x00000000001C0000-0x00000000001D3000-memory.dmp

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memory/4212-16-0x0000000000400000-0x000000000044D000-memory.dmp

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memory/4212-8-0x0000000000780000-0x0000000000880000-memory.dmp

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memory/4856-1-0x0000000000660000-0x0000000000760000-memory.dmp

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memory/4856-15-0x0000000000400000-0x000000000044D000-memory.dmp

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memory/4856-3-0x0000000000400000-0x000000000044D000-memory.dmp

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memory/4856-2-0x00000000001C0000-0x00000000001D3000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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