tofsee | bc51cad0a8ed5eb57551f034a5f693b4d1c135201a38ff4b3d7c1eb6151745c2

General

Target

f5a99263467440a04da884e37b581577_JaffaCakes118.exe
Size

14.2MB
MD5

f5a99263467440a04da884e37b581577
SHA1

58c016d9dae50898c03dc602997db96b14fbc2fe
SHA256

bc51cad0a8ed5eb57551f034a5f693b4d1c135201a38ff4b3d7c1eb6151745c2
SHA512

b5255af60ca12756011398e5907ef6587cd9ea77401b55b30c0812c2c616ab492eff9d2bba6c5a7ba7732e2f4f0eba80d702bb0d98e767499d182219e16f45af
SSDEEP

196608:H4TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTH:H

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

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

Processes:

netsh.exe

pid process

2992 netsh.exe

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

Processes:

svchost.exe

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

Processes:

f5a99263467440a04da884e37b581577_JaffaCakes118.exe

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

Processes:

svchost.exe

pid process

1388 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

oiekvfxd.exe

pid process

3296 oiekvfxd.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

oiekvfxd.exe

description pid process target process

PID 3296 set thread context of 1388 3296 oiekvfxd.exe svchost.exe
Launches sc.exe 3 IoCs
Sc.exe is a Windows utlilty to control services on the system.

Processes:

sc.exesc.exesc.exe

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

Processes:

WerFault.exeWerFault.exe

pid pid_target process target process

780 4784 WerFault.exe f5a99263467440a04da884e37b581577_JaffaCakes118.exe
3464 3296 WerFault.exe oiekvfxd.exe

pid	process
1388	svchost.exe

pid	process
3296	oiekvfxd.exe

description	pid	process	target process
PID 3296 set thread context of 1388	3296	oiekvfxd.exe	svchost.exe

pid	process
2216	sc.exe
2976	sc.exe
2980	sc.exe

pid	pid_target	process	target process
780	4784	WerFault.exe	f5a99263467440a04da884e37b581577_JaffaCakes118.exe
3464	3296	WerFault.exe	oiekvfxd.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

f5a99263467440a04da884e37b581577_JaffaCakes118.exeoiekvfxd.exe

description	pid	process	target process
PID 4784 wrote to memory of 4208	4784	f5a99263467440a04da884e37b581577_JaffaCakes118.exe	cmd.exe
PID 4784 wrote to memory of 4208	4784	f5a99263467440a04da884e37b581577_JaffaCakes118.exe	cmd.exe
PID 4784 wrote to memory of 4208	4784	f5a99263467440a04da884e37b581577_JaffaCakes118.exe	cmd.exe
PID 4784 wrote to memory of 3108	4784	f5a99263467440a04da884e37b581577_JaffaCakes118.exe	cmd.exe
PID 4784 wrote to memory of 3108	4784	f5a99263467440a04da884e37b581577_JaffaCakes118.exe	cmd.exe
PID 4784 wrote to memory of 3108	4784	f5a99263467440a04da884e37b581577_JaffaCakes118.exe	cmd.exe
PID 4784 wrote to memory of 2976	4784	f5a99263467440a04da884e37b581577_JaffaCakes118.exe	sc.exe
PID 4784 wrote to memory of 2976	4784	f5a99263467440a04da884e37b581577_JaffaCakes118.exe	sc.exe
PID 4784 wrote to memory of 2976	4784	f5a99263467440a04da884e37b581577_JaffaCakes118.exe	sc.exe
PID 4784 wrote to memory of 2980	4784	f5a99263467440a04da884e37b581577_JaffaCakes118.exe	sc.exe
PID 4784 wrote to memory of 2980	4784	f5a99263467440a04da884e37b581577_JaffaCakes118.exe	sc.exe
PID 4784 wrote to memory of 2980	4784	f5a99263467440a04da884e37b581577_JaffaCakes118.exe	sc.exe
PID 4784 wrote to memory of 2216	4784	f5a99263467440a04da884e37b581577_JaffaCakes118.exe	sc.exe
PID 4784 wrote to memory of 2216	4784	f5a99263467440a04da884e37b581577_JaffaCakes118.exe	sc.exe
PID 4784 wrote to memory of 2216	4784	f5a99263467440a04da884e37b581577_JaffaCakes118.exe	sc.exe
PID 4784 wrote to memory of 2992	4784	f5a99263467440a04da884e37b581577_JaffaCakes118.exe	netsh.exe
PID 4784 wrote to memory of 2992	4784	f5a99263467440a04da884e37b581577_JaffaCakes118.exe	netsh.exe
PID 4784 wrote to memory of 2992	4784	f5a99263467440a04da884e37b581577_JaffaCakes118.exe	netsh.exe
PID 3296 wrote to memory of 1388	3296	oiekvfxd.exe	svchost.exe
PID 3296 wrote to memory of 1388	3296	oiekvfxd.exe	svchost.exe
PID 3296 wrote to memory of 1388	3296	oiekvfxd.exe	svchost.exe
PID 3296 wrote to memory of 1388	3296	oiekvfxd.exe	svchost.exe
PID 3296 wrote to memory of 1388	3296	oiekvfxd.exe	svchost.exe

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 Matrix ATT&CK v13

Initial Access

Execution

Persistence

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Impair Defenses

1

T1562

Disable or Modify System Firewall

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\Temp\oiekvfxd.exe
Filesize
12.2MB

MD5
5ffbacbb73c5b952964e73a9953f2fac

SHA1
c334608d1235aca71400630d22bc1abc2249d2bd

SHA256
deae04aef828fd927fcb777a7e6d33c73d854ea9aba770076e940540fc23ad96

SHA512
af3355c73a999c2bea9500b1c9b973c09b1d16d9cbbbba646059588e0a3f0a33407612e880cc9f3c2a2a597cd198b037089991f0ab5fb2a6ea8d331c2297c125

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

Filesize
84KB

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

Filesize
84KB

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

Filesize
84KB

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

Filesize
84KB

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

Filesize
1024KB

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

Filesize
4.4MB

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

Filesize
4.4MB

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

Filesize
4.4MB

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

Filesize
76KB

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

Filesize
4.4MB

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

Filesize
76KB

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

Filesize
1024KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads