tofsee | cba35a2e5c88c4b433d635d3321516b95421c97a026a6b6eb19417884e1ffe50

General

Target

fe27b377e9edd9ecaccec493a2d15b2c_JaffaCakes118.exe
Size

10.1MB
MD5

fe27b377e9edd9ecaccec493a2d15b2c
SHA1

4b4897923a21b80153888d0861baa9bfea6bc02b
SHA256

cba35a2e5c88c4b433d635d3321516b95421c97a026a6b6eb19417884e1ffe50
SHA512

6a2fea03da9079b8d4614fcbf148454aa820cd0cdb5b59b8407b2b216f7f672f76001873fb82be0530cb013022d0bf7c9f9eacb145e777a5c95ad2195d78949e
SSDEEP

98304:K2UUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUU0:K

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

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

Processes:

netsh.exe

pid process

1768 netsh.exe

pid	process
1768	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\zflswrot\ImagePath = "C:\\Windows\\SysWOW64\\zflswrot\\nsffihxc.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:

fe27b377e9edd9ecaccec493a2d15b2c_JaffaCakes118.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2177723727-746291240-1644359950-1000\Control Panel\International\Geo\Nation	fe27b377e9edd9ecaccec493a2d15b2c_JaffaCakes118.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

3904 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

nsffihxc.exe

pid process

2256 nsffihxc.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

nsffihxc.exe

description pid process target process

PID 2256 set thread context of 3904 2256 nsffihxc.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

3284 sc.exe
4584 sc.exe
4580 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

2940 1528 WerFault.exe fe27b377e9edd9ecaccec493a2d15b2c_JaffaCakes118.exe
1416 2256 WerFault.exe nsffihxc.exe

pid	process
3904	svchost.exe

pid	process
2256	nsffihxc.exe

description	pid	process	target process
PID 2256 set thread context of 3904	2256	nsffihxc.exe	svchost.exe

pid	process
3284	sc.exe
4584	sc.exe
4580	sc.exe

pid	pid_target	process	target process
2940	1528	WerFault.exe	fe27b377e9edd9ecaccec493a2d15b2c_JaffaCakes118.exe
1416	2256	WerFault.exe	nsffihxc.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

fe27b377e9edd9ecaccec493a2d15b2c_JaffaCakes118.exensffihxc.exe

description	pid	process	target process
PID 1528 wrote to memory of 4868	1528	fe27b377e9edd9ecaccec493a2d15b2c_JaffaCakes118.exe	cmd.exe
PID 1528 wrote to memory of 4868	1528	fe27b377e9edd9ecaccec493a2d15b2c_JaffaCakes118.exe	cmd.exe
PID 1528 wrote to memory of 4868	1528	fe27b377e9edd9ecaccec493a2d15b2c_JaffaCakes118.exe	cmd.exe
PID 1528 wrote to memory of 3248	1528	fe27b377e9edd9ecaccec493a2d15b2c_JaffaCakes118.exe	cmd.exe
PID 1528 wrote to memory of 3248	1528	fe27b377e9edd9ecaccec493a2d15b2c_JaffaCakes118.exe	cmd.exe
PID 1528 wrote to memory of 3248	1528	fe27b377e9edd9ecaccec493a2d15b2c_JaffaCakes118.exe	cmd.exe
PID 1528 wrote to memory of 3284	1528	fe27b377e9edd9ecaccec493a2d15b2c_JaffaCakes118.exe	sc.exe
PID 1528 wrote to memory of 3284	1528	fe27b377e9edd9ecaccec493a2d15b2c_JaffaCakes118.exe	sc.exe
PID 1528 wrote to memory of 3284	1528	fe27b377e9edd9ecaccec493a2d15b2c_JaffaCakes118.exe	sc.exe
PID 1528 wrote to memory of 4584	1528	fe27b377e9edd9ecaccec493a2d15b2c_JaffaCakes118.exe	sc.exe
PID 1528 wrote to memory of 4584	1528	fe27b377e9edd9ecaccec493a2d15b2c_JaffaCakes118.exe	sc.exe
PID 1528 wrote to memory of 4584	1528	fe27b377e9edd9ecaccec493a2d15b2c_JaffaCakes118.exe	sc.exe
PID 1528 wrote to memory of 4580	1528	fe27b377e9edd9ecaccec493a2d15b2c_JaffaCakes118.exe	sc.exe
PID 1528 wrote to memory of 4580	1528	fe27b377e9edd9ecaccec493a2d15b2c_JaffaCakes118.exe	sc.exe
PID 1528 wrote to memory of 4580	1528	fe27b377e9edd9ecaccec493a2d15b2c_JaffaCakes118.exe	sc.exe
PID 2256 wrote to memory of 3904	2256	nsffihxc.exe	svchost.exe
PID 2256 wrote to memory of 3904	2256	nsffihxc.exe	svchost.exe
PID 2256 wrote to memory of 3904	2256	nsffihxc.exe	svchost.exe
PID 2256 wrote to memory of 3904	2256	nsffihxc.exe	svchost.exe
PID 2256 wrote to memory of 3904	2256	nsffihxc.exe	svchost.exe
PID 1528 wrote to memory of 1768	1528	fe27b377e9edd9ecaccec493a2d15b2c_JaffaCakes118.exe	netsh.exe
PID 1528 wrote to memory of 1768	1528	fe27b377e9edd9ecaccec493a2d15b2c_JaffaCakes118.exe	netsh.exe
PID 1528 wrote to memory of 1768	1528	fe27b377e9edd9ecaccec493a2d15b2c_JaffaCakes118.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\fe27b377e9edd9ecaccec493a2d15b2c_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\fe27b377e9edd9ecaccec493a2d15b2c_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1528

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\zflswrot\
2⤵
PID:4868

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\nsffihxc.exe" C:\Windows\SysWOW64\zflswrot\
2⤵
PID:3248

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create zflswrot binPath= "C:\Windows\SysWOW64\zflswrot\nsffihxc.exe /d\"C:\Users\Admin\AppData\Local\Temp\fe27b377e9edd9ecaccec493a2d15b2c_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:3284

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description zflswrot "wifi internet conection"
2⤵
- Launches sc.exe
PID:4584

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start zflswrot
2⤵
- Launches sc.exe
PID:4580

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:1768

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1528 -s 1308
2⤵
- Program crash
PID:2940

C:\Windows\SysWOW64\zflswrot\nsffihxc.exe
C:\Windows\SysWOW64\zflswrot\nsffihxc.exe /d"C:\Users\Admin\AppData\Local\Temp\fe27b377e9edd9ecaccec493a2d15b2c_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2256

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
- Deletes itself
PID:3904

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 2256 -s 532
2⤵
- Program crash
PID:1416

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 1528 -ip 1528
1⤵
PID:3608

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 500 -p 2256 -ip 2256
1⤵
PID:760

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

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

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\nsffihxc.exe

Filesize
10.2MB

MD5
fc52c6314b8e0c940df48402893a667f

SHA1
f5b9e24573a3374c98d072910c1fb8898bc7708c

SHA256
23b9b2c8e0c7b5e8bf3e1b05a7801d0cf7ab9843c7da4af22111e742c974db81

SHA512
1123f5e0dd2b8e89503297d358f648004692fd9c13c46079cac9dc60b9260ead98a2de99f49bf1239dfd71e91ab74fc6c9aacd6d7eed7341bb6401112b06d7fc

Download Submit
memory/1528-1-0x0000000000640000-0x0000000000740000-memory.dmp

Filesize
1024KB

Download
memory/1528-2-0x00000000005E0000-0x00000000005F3000-memory.dmp

Filesize
76KB

Download
memory/1528-4-0x0000000000400000-0x0000000000474000-memory.dmp

Filesize
464KB

Download
memory/1528-16-0x0000000000400000-0x0000000000474000-memory.dmp

Filesize
464KB

Download
memory/2256-9-0x00000000005D0000-0x00000000005E3000-memory.dmp

Filesize
76KB

Download
memory/2256-10-0x0000000000400000-0x0000000000474000-memory.dmp

Filesize
464KB

Download
memory/2256-15-0x0000000000400000-0x0000000000474000-memory.dmp

Filesize
464KB

Download
memory/2256-8-0x0000000000730000-0x0000000000830000-memory.dmp

Filesize
1024KB

Download
memory/3904-11-0x0000000000710000-0x0000000000725000-memory.dmp

Filesize
84KB

Download
memory/3904-14-0x0000000000710000-0x0000000000725000-memory.dmp

Filesize
84KB

Download
memory/3904-17-0x0000000000710000-0x0000000000725000-memory.dmp

Filesize
84KB

Download
memory/3904-18-0x0000000000710000-0x0000000000725000-memory.dmp

Filesize
84KB

Download
memory/3904-19-0x0000000000710000-0x0000000000725000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads