tofsee | 57c5476b2f41ec87a6b74153c52b442d47172ad8f59a578e4ac6e902dec3be3f

Analysis

max time kernel
150s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
20/04/2024, 07:24

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General

Target
fc3bb27a0cf68b519a1ff98126da4083_JaffaCakes118.exe
Size 10.4MB
Sample240420-h8jklsbe76
SHA256 57c5476b2f41ec87a6b74153c52b442d47172ad8f59a578e4ac6e902dec3be3f
MD5 fc3bb27a0cf68b519a1ff98126da4083
SHA1 d52434e6d7326478e4d2931b379ed30c31ead569
SHA512 8fded19f127deaa5d52d8c88b89009ebf1626ada44556fcc50e9cd048c399c31d89668232db2790afbbbf0072cb5806a7f00e92391c0815f39211cbf9c7ffcdc
SSDEEP 3072:EOsUA8KZQ/IxsPVg4nkvzaHWgSjqdF0w2Uyopz9ZeCqJXXfehv1Ijoxw9xkaaaaK:eUA8GV2e4nYWHEjqPt9cCqxmhv1pxQ
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
3224	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\ihgfixig\ImagePath = "C:\\Windows\\SysWOW64\\ihgfixig\\pwzxyyoc.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-1-5-21-1132431369-515282257-1998160155-1000\Control Panel\International\Geo\Nation	fc3bb27a0cf68b519a1ff98126da4083_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
3968	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3804	pwzxyyoc.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3804 set thread context of 3968	3804	pwzxyyoc.exe	104

Launches sc.exe 3 IoCs

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

pid	Process
4380	sc.exe
4476	sc.exe
4984	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
5056	4876	WerFault.exe	83
1792	3804	WerFault.exe	98

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4876 wrote to memory of 1476	4876	fc3bb27a0cf68b519a1ff98126da4083_JaffaCakes118.exe	87
PID 4876 wrote to memory of 1476	4876	fc3bb27a0cf68b519a1ff98126da4083_JaffaCakes118.exe	87
PID 4876 wrote to memory of 1476	4876	fc3bb27a0cf68b519a1ff98126da4083_JaffaCakes118.exe	87
PID 4876 wrote to memory of 1576	4876	fc3bb27a0cf68b519a1ff98126da4083_JaffaCakes118.exe	89
PID 4876 wrote to memory of 1576	4876	fc3bb27a0cf68b519a1ff98126da4083_JaffaCakes118.exe	89
PID 4876 wrote to memory of 1576	4876	fc3bb27a0cf68b519a1ff98126da4083_JaffaCakes118.exe	89
PID 4876 wrote to memory of 4380	4876	fc3bb27a0cf68b519a1ff98126da4083_JaffaCakes118.exe	92
PID 4876 wrote to memory of 4380	4876	fc3bb27a0cf68b519a1ff98126da4083_JaffaCakes118.exe	92
PID 4876 wrote to memory of 4380	4876	fc3bb27a0cf68b519a1ff98126da4083_JaffaCakes118.exe	92
PID 4876 wrote to memory of 4476	4876	fc3bb27a0cf68b519a1ff98126da4083_JaffaCakes118.exe	94
PID 4876 wrote to memory of 4476	4876	fc3bb27a0cf68b519a1ff98126da4083_JaffaCakes118.exe	94
PID 4876 wrote to memory of 4476	4876	fc3bb27a0cf68b519a1ff98126da4083_JaffaCakes118.exe	94
PID 4876 wrote to memory of 4984	4876	fc3bb27a0cf68b519a1ff98126da4083_JaffaCakes118.exe	96
PID 4876 wrote to memory of 4984	4876	fc3bb27a0cf68b519a1ff98126da4083_JaffaCakes118.exe	96
PID 4876 wrote to memory of 4984	4876	fc3bb27a0cf68b519a1ff98126da4083_JaffaCakes118.exe	96
PID 4876 wrote to memory of 3224	4876	fc3bb27a0cf68b519a1ff98126da4083_JaffaCakes118.exe	99
PID 4876 wrote to memory of 3224	4876	fc3bb27a0cf68b519a1ff98126da4083_JaffaCakes118.exe	99
PID 4876 wrote to memory of 3224	4876	fc3bb27a0cf68b519a1ff98126da4083_JaffaCakes118.exe	99
PID 3804 wrote to memory of 3968	3804	pwzxyyoc.exe	104
PID 3804 wrote to memory of 3968	3804	pwzxyyoc.exe	104
PID 3804 wrote to memory of 3968	3804	pwzxyyoc.exe	104
PID 3804 wrote to memory of 3968	3804	pwzxyyoc.exe	104
PID 3804 wrote to memory of 3968	3804	pwzxyyoc.exe	104

C:\Users\Admin\AppData\Local\Temp\fc3bb27a0cf68b519a1ff98126da4083_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\fc3bb27a0cf68b519a1ff98126da4083_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4876
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ihgfixig\
  2⤵
  PID:1476
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\pwzxyyoc.exe" C:\Windows\SysWOW64\ihgfixig\
  2⤵
  PID:1576
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create ihgfixig binPath= "C:\Windows\SysWOW64\ihgfixig\pwzxyyoc.exe /d\"C:\Users\Admin\AppData\Local\Temp\fc3bb27a0cf68b519a1ff98126da4083_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:4380
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description ihgfixig "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:4476
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start ihgfixig
  2⤵
  - Launches sc.exe
  PID:4984
- 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:3224
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4876 -s 896
  2⤵
  - Program crash
  PID:5056

C:\Windows\SysWOW64\ihgfixig\pwzxyyoc.exe
C:\Windows\SysWOW64\ihgfixig\pwzxyyoc.exe /d"C:\Users\Admin\AppData\Local\Temp\fc3bb27a0cf68b519a1ff98126da4083_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3804
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:3968
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3804 -s 516
  2⤵
  - Program crash
  PID:1792

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4876 -ip 4876
1⤵
PID:4868

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 3804 -ip 3804
1⤵
PID:4728

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

pwzxyyoc.exe

Path C:\Users\Admin\AppData\Local\Temp\pwzxyyoc.exe
Size 14.1MB
SHA256 159149841d344fcc07e2ecd3083ee61f6eb0dc07c0d3901aab7ac5ca465dd0a8
MD5 92efd667d500a602051a89f3984f0df4
SHA1 afcfc420ed9aac73a4b4369f093a8e71c34b88e6
SHA512 5ab2d8015bcf5167edcd8f86437a25a2ba229b8c591eb88e02603a50882b9d799d73bfebc2d3fd82f749b3d28ff25ca0400eebbfcba662e2567651e361270589
SSDEEP 3072:AOsUA8KZQ/IxsPVg4nkvzaHWgSjqdF0w2Uyopz9ZeCqJXXfehv1Ijoxw9xkaaaaS:SUA8GV2e4nYWHEjqPt9cCqxmhv1pxQ
MD5 SHA1 SHA512 SSDEEP

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memory/3804-10-0x0000000000BF0000-0x0000000000CF0000-memory.dmp

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memory/3804-12-0x0000000000400000-0x000000000086C000-memory.dmp

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memory/3804-18-0x0000000000400000-0x000000000086C000-memory.dmp

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memory/3968-11-0x00000000003C0000-0x00000000003D5000-memory.dmp

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memory/3968-15-0x00000000003C0000-0x00000000003D5000-memory.dmp

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memory/3968-17-0x00000000003C0000-0x00000000003D5000-memory.dmp

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memory/3968-19-0x00000000003C0000-0x00000000003D5000-memory.dmp

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memory/4876-4-0x0000000000400000-0x000000000086C000-memory.dmp

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memory/4876-2-0x00000000008E0000-0x00000000008F3000-memory.dmp

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memory/4876-8-0x0000000000400000-0x000000000086C000-memory.dmp

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memory/4876-9-0x00000000008E0000-0x00000000008F3000-memory.dmp

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memory/4876-1-0x0000000000980000-0x0000000000A80000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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