tofsee | bc51cad0a8ed5eb57551f034a5f693b4d1c135201a38ff4b3d7c1eb6151745c2

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
17/04/2024, 11:26

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General

Target
f5a99263467440a04da884e37b581577_JaffaCakes118.exe
Size 14.2MB
Sample240417-nkcp2sdc46
SHA256 bc51cad0a8ed5eb57551f034a5f693b4d1c135201a38ff4b3d7c1eb6151745c2
MD5 f5a99263467440a04da884e37b581577
SHA1 58c016d9dae50898c03dc602997db96b14fbc2fe
SHA512 b5255af60ca12756011398e5907ef6587cd9ea77401b55b30c0812c2c616ab492eff9d2bba6c5a7ba7732e2f4f0eba80d702bb0d98e767499d182219e16f45af
SSDEEP 196608:H4TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTH:H
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
2992	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\xsmusoku\ImagePath = "C:\\Windows\\SysWOW64\\xsmusoku\\oiekvfxd.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-1-5-21-355664440-2199602304-1223909400-1000\Control Panel\International\Geo\Nation	f5a99263467440a04da884e37b581577_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
1388	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3296	oiekvfxd.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3296 set thread context of 1388	3296	oiekvfxd.exe	101

Launches sc.exe 3 IoCs

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

pid	Process
2216	sc.exe
2976	sc.exe
2980	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
780	4784	WerFault.exe	81
3464	3296	WerFault.exe	95

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4784 wrote to memory of 4208	4784	f5a99263467440a04da884e37b581577_JaffaCakes118.exe	85
PID 4784 wrote to memory of 4208	4784	f5a99263467440a04da884e37b581577_JaffaCakes118.exe	85
PID 4784 wrote to memory of 4208	4784	f5a99263467440a04da884e37b581577_JaffaCakes118.exe	85
PID 4784 wrote to memory of 3108	4784	f5a99263467440a04da884e37b581577_JaffaCakes118.exe	87
PID 4784 wrote to memory of 3108	4784	f5a99263467440a04da884e37b581577_JaffaCakes118.exe	87
PID 4784 wrote to memory of 3108	4784	f5a99263467440a04da884e37b581577_JaffaCakes118.exe	87
PID 4784 wrote to memory of 2976	4784	f5a99263467440a04da884e37b581577_JaffaCakes118.exe	89
PID 4784 wrote to memory of 2976	4784	f5a99263467440a04da884e37b581577_JaffaCakes118.exe	89
PID 4784 wrote to memory of 2976	4784	f5a99263467440a04da884e37b581577_JaffaCakes118.exe	89
PID 4784 wrote to memory of 2980	4784	f5a99263467440a04da884e37b581577_JaffaCakes118.exe	91
PID 4784 wrote to memory of 2980	4784	f5a99263467440a04da884e37b581577_JaffaCakes118.exe	91
PID 4784 wrote to memory of 2980	4784	f5a99263467440a04da884e37b581577_JaffaCakes118.exe	91
PID 4784 wrote to memory of 2216	4784	f5a99263467440a04da884e37b581577_JaffaCakes118.exe	93
PID 4784 wrote to memory of 2216	4784	f5a99263467440a04da884e37b581577_JaffaCakes118.exe	93
PID 4784 wrote to memory of 2216	4784	f5a99263467440a04da884e37b581577_JaffaCakes118.exe	93
PID 4784 wrote to memory of 2992	4784	f5a99263467440a04da884e37b581577_JaffaCakes118.exe	96
PID 4784 wrote to memory of 2992	4784	f5a99263467440a04da884e37b581577_JaffaCakes118.exe	96
PID 4784 wrote to memory of 2992	4784	f5a99263467440a04da884e37b581577_JaffaCakes118.exe	96
PID 3296 wrote to memory of 1388	3296	oiekvfxd.exe	101
PID 3296 wrote to memory of 1388	3296	oiekvfxd.exe	101
PID 3296 wrote to memory of 1388	3296	oiekvfxd.exe	101
PID 3296 wrote to memory of 1388	3296	oiekvfxd.exe	101
PID 3296 wrote to memory of 1388	3296	oiekvfxd.exe	101

C:\Users\Admin\AppData\Local\Temp\f5a99263467440a04da884e37b581577_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f5a99263467440a04da884e37b581577_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4784
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\xsmusoku\
  2⤵
  PID:4208
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\oiekvfxd.exe" C:\Windows\SysWOW64\xsmusoku\
  2⤵
  PID:3108
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create xsmusoku binPath= "C:\Windows\SysWOW64\xsmusoku\oiekvfxd.exe /d\"C:\Users\Admin\AppData\Local\Temp\f5a99263467440a04da884e37b581577_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:2976
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description xsmusoku "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:2980
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start xsmusoku
  2⤵
  - Launches sc.exe
  PID:2216
- 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:2992
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4784 -s 1312
  2⤵
  - Program crash
  PID:780

C:\Windows\SysWOW64\xsmusoku\oiekvfxd.exe
C:\Windows\SysWOW64\xsmusoku\oiekvfxd.exe /d"C:\Users\Admin\AppData\Local\Temp\f5a99263467440a04da884e37b581577_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3296
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:1388
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3296 -s 344
  2⤵
  - Program crash
  PID:3464

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 4784 -ip 4784
1⤵
PID:212

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 3296 -ip 3296
1⤵
PID:1248

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

oiekvfxd.exe

Path C:\Users\Admin\AppData\Local\Temp\oiekvfxd.exe
Size 12.2MB
SHA256 deae04aef828fd927fcb777a7e6d33c73d854ea9aba770076e940540fc23ad96
MD5 5ffbacbb73c5b952964e73a9953f2fac
SHA1 c334608d1235aca71400630d22bc1abc2249d2bd
SHA512 af3355c73a999c2bea9500b1c9b973c09b1d16d9cbbbba646059588e0a3f0a33407612e880cc9f3c2a2a597cd198b037089991f0ab5fb2a6ea8d331c2297c125
SSDEEP 196608:q4TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTn:q
MD5 SHA1 SHA512 SSDEEP

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memory/1388-15-0x0000000000E20000-0x0000000000E35000-memory.dmp

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memory/1388-11-0x0000000000E20000-0x0000000000E35000-memory.dmp

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memory/1388-16-0x0000000000E20000-0x0000000000E35000-memory.dmp

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memory/1388-18-0x0000000000E20000-0x0000000000E35000-memory.dmp

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memory/3296-10-0x0000000000AF0000-0x0000000000BF0000-memory.dmp

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memory/3296-12-0x0000000000400000-0x0000000000870000-memory.dmp

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memory/3296-17-0x0000000000400000-0x0000000000870000-memory.dmp

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memory/4784-4-0x0000000000400000-0x0000000000870000-memory.dmp

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memory/4784-2-0x00000000001C0000-0x00000000001D3000-memory.dmp

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memory/4784-8-0x0000000000400000-0x0000000000870000-memory.dmp

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memory/4784-9-0x00000000001C0000-0x00000000001D3000-memory.dmp

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memory/4784-1-0x0000000000A60000-0x0000000000B60000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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