tofsee | a1978f71a6c74917b832e91e4ca0f7e7c7aad4cebf354696c92b0e42ef2af0ac

General

Target

53d76bb5b64e47426f0e917df07fe458_JaffaCakes118.exe
Size

100KB
MD5

53d76bb5b64e47426f0e917df07fe458
SHA1

fd7a4854773cec14c3faac841f58f22f4d870bea
SHA256

a1978f71a6c74917b832e91e4ca0f7e7c7aad4cebf354696c92b0e42ef2af0ac
SHA512

44bb18fe4cd15f56f5f51d1599d1f0765b122b57c0469f4004e950770c470c68d13283a958e5489f7355a6aa31e288531a6f905c83e2212af3dfae51cb05272b
SSDEEP

1536:K0HtGDRSAfMOdAhezBhgmnK5649QAqZD0EinrGOlI3M4a50R3ddbhUfIVIjE1:uDRSApAhGBhgO495KzODINdR/2f+P

Score

10^/10

tofsee evasion execution 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) 2 TTPs
persistence execution

Windows Service
T1543.003

Service Execution
T1569.002
Modifies Windows Firewall 2 TTPs 1 IoCs
evasion

Windows Service
T1543.003

Disable or Modify System Firewall
T1562.004

Processes:

netsh.exe

pid process

1100 netsh.exe

pid	process
1100	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\yqhciwol\ImagePath = "C:\\Windows\\SysWOW64\\yqhciwol\\nuhhkvni.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:

53d76bb5b64e47426f0e917df07fe458_JaffaCakes118.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1162180587-977231257-2194346871-1000\Control Panel\International\Geo\Nation	53d76bb5b64e47426f0e917df07fe458_JaffaCakes118.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

4940 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

nuhhkvni.exe

pid process

4672 nuhhkvni.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

nuhhkvni.exe

description pid process target process

PID 4672 set thread context of 4940 4672 nuhhkvni.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

4040 sc.exe
404 sc.exe
880 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
4940	svchost.exe

pid	process
4672	nuhhkvni.exe

description	pid	process	target process
PID 4672 set thread context of 4940	4672	nuhhkvni.exe	svchost.exe

pid	process
4040	sc.exe
404	sc.exe
880	sc.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

53d76bb5b64e47426f0e917df07fe458_JaffaCakes118.exenuhhkvni.exe

description	pid	process	target process
PID 1936 wrote to memory of 436	1936	53d76bb5b64e47426f0e917df07fe458_JaffaCakes118.exe	cmd.exe
PID 1936 wrote to memory of 436	1936	53d76bb5b64e47426f0e917df07fe458_JaffaCakes118.exe	cmd.exe
PID 1936 wrote to memory of 436	1936	53d76bb5b64e47426f0e917df07fe458_JaffaCakes118.exe	cmd.exe
PID 1936 wrote to memory of 2512	1936	53d76bb5b64e47426f0e917df07fe458_JaffaCakes118.exe	cmd.exe
PID 1936 wrote to memory of 2512	1936	53d76bb5b64e47426f0e917df07fe458_JaffaCakes118.exe	cmd.exe
PID 1936 wrote to memory of 2512	1936	53d76bb5b64e47426f0e917df07fe458_JaffaCakes118.exe	cmd.exe
PID 1936 wrote to memory of 4040	1936	53d76bb5b64e47426f0e917df07fe458_JaffaCakes118.exe	sc.exe
PID 1936 wrote to memory of 4040	1936	53d76bb5b64e47426f0e917df07fe458_JaffaCakes118.exe	sc.exe
PID 1936 wrote to memory of 4040	1936	53d76bb5b64e47426f0e917df07fe458_JaffaCakes118.exe	sc.exe
PID 1936 wrote to memory of 404	1936	53d76bb5b64e47426f0e917df07fe458_JaffaCakes118.exe	sc.exe
PID 1936 wrote to memory of 404	1936	53d76bb5b64e47426f0e917df07fe458_JaffaCakes118.exe	sc.exe
PID 1936 wrote to memory of 404	1936	53d76bb5b64e47426f0e917df07fe458_JaffaCakes118.exe	sc.exe
PID 1936 wrote to memory of 880	1936	53d76bb5b64e47426f0e917df07fe458_JaffaCakes118.exe	sc.exe
PID 1936 wrote to memory of 880	1936	53d76bb5b64e47426f0e917df07fe458_JaffaCakes118.exe	sc.exe
PID 1936 wrote to memory of 880	1936	53d76bb5b64e47426f0e917df07fe458_JaffaCakes118.exe	sc.exe
PID 4672 wrote to memory of 4940	4672	nuhhkvni.exe	svchost.exe
PID 4672 wrote to memory of 4940	4672	nuhhkvni.exe	svchost.exe
PID 4672 wrote to memory of 4940	4672	nuhhkvni.exe	svchost.exe
PID 4672 wrote to memory of 4940	4672	nuhhkvni.exe	svchost.exe
PID 4672 wrote to memory of 4940	4672	nuhhkvni.exe	svchost.exe
PID 1936 wrote to memory of 1100	1936	53d76bb5b64e47426f0e917df07fe458_JaffaCakes118.exe	netsh.exe
PID 1936 wrote to memory of 1100	1936	53d76bb5b64e47426f0e917df07fe458_JaffaCakes118.exe	netsh.exe
PID 1936 wrote to memory of 1100	1936	53d76bb5b64e47426f0e917df07fe458_JaffaCakes118.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\53d76bb5b64e47426f0e917df07fe458_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\53d76bb5b64e47426f0e917df07fe458_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1936

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\yqhciwol\
2⤵
PID:436

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\nuhhkvni.exe" C:\Windows\SysWOW64\yqhciwol\
2⤵
PID:2512

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create yqhciwol binPath= "C:\Windows\SysWOW64\yqhciwol\nuhhkvni.exe /d\"C:\Users\Admin\AppData\Local\Temp\53d76bb5b64e47426f0e917df07fe458_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:4040

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description yqhciwol "wifi internet conection"
2⤵
- Launches sc.exe
PID:404

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start yqhciwol
2⤵
- Launches sc.exe
PID:880

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:1100

C:\Windows\SysWOW64\yqhciwol\nuhhkvni.exe
C:\Windows\SysWOW64\yqhciwol\nuhhkvni.exe /d"C:\Users\Admin\AppData\Local\Temp\53d76bb5b64e47426f0e917df07fe458_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4672

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
- Deletes itself
PID:4940

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

System Services

1

T1569

Service Execution

1

T1569.002

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\nuhhkvni.exe
Filesize
11.8MB

MD5
c4aa30997f2b34ee7391ab7b01d605cd

SHA1
8db46af2148d4577d586303efff0fe89af537cb0

SHA256
6df97e8494d484ae1d74fe06f93191c6c7cdca20f7f9f2fdde01a3a5ceb34700

SHA512
b0d3324db79d1f4c465cf5e248ad104c0c320fc3df32ec9a98bcbc463f6dab3c3ebfc6314336de542f1c66d5d219981615c9cf2e178334dce259d1610d0020a2

Download Submit
memory/1936-13-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/1936-3-0x0000000000460000-0x0000000000461000-memory.dmp

Filesize
4KB

Download
memory/1936-0-0x0000000002490000-0x0000000002491000-memory.dmp

Filesize
4KB

Download
memory/1936-1-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/4672-6-0x00000000006F0000-0x00000000006F1000-memory.dmp

Filesize
4KB

Download
memory/4672-7-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/4672-9-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/4940-8-0x0000000000690000-0x00000000006A5000-memory.dmp

Filesize
84KB

Download
memory/4940-12-0x0000000000690000-0x00000000006A5000-memory.dmp

Filesize
84KB

Download
memory/4940-14-0x0000000000690000-0x00000000006A5000-memory.dmp

Filesize
84KB

Download
memory/4940-15-0x0000000000690000-0x00000000006A5000-memory.dmp

Filesize
84KB

Download
memory/4940-16-0x0000000000690000-0x00000000006A5000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

Loading Replay Monitor...

Downloads