tofsee | 4862a24b71b2b82a87363c6e8f76784c96fca5a5285611387c8c012928206445

Analysis

max time kernel
140s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
21/04/2024, 01:24

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General

Target
fe1a54e652e0aabbeef12672ab7cd8b6_JaffaCakes118.exe
Size 12.5MB
Sample240421-bspclaff7t
SHA256 4862a24b71b2b82a87363c6e8f76784c96fca5a5285611387c8c012928206445
MD5 fe1a54e652e0aabbeef12672ab7cd8b6
SHA1 ade9b1b9a4cffb7273e0d4658c46e4b96da074cb
SHA512 fc5f7260a03670a45105b77e4eab17cd784f43fc689e8c7314848f08cabbefcd833cef6e42736585dcd8af54d0642db4249e70ffd6b7b6153dcbe09bf97f41e0
SSDEEP 49152:oM+SSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSz:o
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

tofsee evasion persistence 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
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
3940	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\yywechrq\ImagePath = "C:\\Windows\\SysWOW64\\yywechrq\\uwpahpdt.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	fe1a54e652e0aabbeef12672ab7cd8b6_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
3716	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1788	uwpahpdt.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1788 set thread context of 3716	1788	uwpahpdt.exe	107

Launches sc.exe 3 IoCs

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

pid	Process
1916	sc.exe
3900	sc.exe
3628	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
1532	4832	WerFault.exe	81
388	1788	WerFault.exe	95

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4832 wrote to memory of 2116	4832	fe1a54e652e0aabbeef12672ab7cd8b6_JaffaCakes118.exe	85
PID 4832 wrote to memory of 2116	4832	fe1a54e652e0aabbeef12672ab7cd8b6_JaffaCakes118.exe	85
PID 4832 wrote to memory of 2116	4832	fe1a54e652e0aabbeef12672ab7cd8b6_JaffaCakes118.exe	85
PID 4832 wrote to memory of 3764	4832	fe1a54e652e0aabbeef12672ab7cd8b6_JaffaCakes118.exe	87
PID 4832 wrote to memory of 3764	4832	fe1a54e652e0aabbeef12672ab7cd8b6_JaffaCakes118.exe	87
PID 4832 wrote to memory of 3764	4832	fe1a54e652e0aabbeef12672ab7cd8b6_JaffaCakes118.exe	87
PID 4832 wrote to memory of 1916	4832	fe1a54e652e0aabbeef12672ab7cd8b6_JaffaCakes118.exe	89
PID 4832 wrote to memory of 1916	4832	fe1a54e652e0aabbeef12672ab7cd8b6_JaffaCakes118.exe	89
PID 4832 wrote to memory of 1916	4832	fe1a54e652e0aabbeef12672ab7cd8b6_JaffaCakes118.exe	89
PID 4832 wrote to memory of 3900	4832	fe1a54e652e0aabbeef12672ab7cd8b6_JaffaCakes118.exe	91
PID 4832 wrote to memory of 3900	4832	fe1a54e652e0aabbeef12672ab7cd8b6_JaffaCakes118.exe	91
PID 4832 wrote to memory of 3900	4832	fe1a54e652e0aabbeef12672ab7cd8b6_JaffaCakes118.exe	91
PID 4832 wrote to memory of 3628	4832	fe1a54e652e0aabbeef12672ab7cd8b6_JaffaCakes118.exe	93
PID 4832 wrote to memory of 3628	4832	fe1a54e652e0aabbeef12672ab7cd8b6_JaffaCakes118.exe	93
PID 4832 wrote to memory of 3628	4832	fe1a54e652e0aabbeef12672ab7cd8b6_JaffaCakes118.exe	93
PID 4832 wrote to memory of 3940	4832	fe1a54e652e0aabbeef12672ab7cd8b6_JaffaCakes118.exe	100
PID 4832 wrote to memory of 3940	4832	fe1a54e652e0aabbeef12672ab7cd8b6_JaffaCakes118.exe	100
PID 4832 wrote to memory of 3940	4832	fe1a54e652e0aabbeef12672ab7cd8b6_JaffaCakes118.exe	100
PID 1788 wrote to memory of 3716	1788	uwpahpdt.exe	107
PID 1788 wrote to memory of 3716	1788	uwpahpdt.exe	107
PID 1788 wrote to memory of 3716	1788	uwpahpdt.exe	107
PID 1788 wrote to memory of 3716	1788	uwpahpdt.exe	107
PID 1788 wrote to memory of 3716	1788	uwpahpdt.exe	107

C:\Users\Admin\AppData\Local\Temp\fe1a54e652e0aabbeef12672ab7cd8b6_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\fe1a54e652e0aabbeef12672ab7cd8b6_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4832
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\yywechrq\
  2⤵
  PID:2116
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\uwpahpdt.exe" C:\Windows\SysWOW64\yywechrq\
  2⤵
  PID:3764
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create yywechrq binPath= "C:\Windows\SysWOW64\yywechrq\uwpahpdt.exe /d\"C:\Users\Admin\AppData\Local\Temp\fe1a54e652e0aabbeef12672ab7cd8b6_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:1916
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description yywechrq "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:3900
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start yywechrq
  2⤵
  - Launches sc.exe
  PID:3628
- 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:3940
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4832 -s 660
  2⤵
  - Program crash
  PID:1532

C:\Windows\SysWOW64\yywechrq\uwpahpdt.exe
C:\Windows\SysWOW64\yywechrq\uwpahpdt.exe /d"C:\Users\Admin\AppData\Local\Temp\fe1a54e652e0aabbeef12672ab7cd8b6_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1788
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:3716
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1788 -s 516
  2⤵
  - Program crash
  PID:388

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4832 -ip 4832
1⤵
PID:4652

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 1788 -ip 1788
1⤵
PID:4380

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

uwpahpdt.exe

Path C:\Users\Admin\AppData\Local\Temp\uwpahpdt.exe
Size 13.8MB
SHA256 316640ba274b1c36f785126ebc413bee57ce67978e7d8af2bf42fa8326ef126d
MD5 5156ccd77d6921205e489b9018209fa8
SHA1 b171914d4595312a6b64fef6ac08dce083b49299
SHA512 f3bb11c7aaabad5b6702bd5357693b1c8649f884760b414c65ab6601ffaa44a4bbbce2dce3336c787dce4ba05b2f24f5a28dfbb6e7fe16fea906ae8f2a074f22
SSDEEP 49152:ZM+SSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS2:Z
MD5 SHA1 SHA512 SSDEEP

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memory/1788-10-0x0000000000600000-0x0000000000700000-memory.dmp

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memory/1788-11-0x0000000000400000-0x0000000000466000-memory.dmp

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memory/1788-17-0x0000000000400000-0x0000000000466000-memory.dmp

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memory/3716-12-0x0000000000C90000-0x0000000000CA5000-memory.dmp

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memory/3716-16-0x0000000000C90000-0x0000000000CA5000-memory.dmp

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memory/3716-18-0x0000000000C90000-0x0000000000CA5000-memory.dmp

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memory/3716-19-0x0000000000C90000-0x0000000000CA5000-memory.dmp

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memory/4832-3-0x0000000000400000-0x0000000000466000-memory.dmp

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memory/4832-2-0x0000000000610000-0x0000000000623000-memory.dmp

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memory/4832-7-0x0000000000400000-0x0000000000466000-memory.dmp

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memory/4832-8-0x0000000000610000-0x0000000000623000-memory.dmp

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memory/4832-1-0x0000000000630000-0x0000000000730000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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