tofsee | 610cb49791e670b6896af06ee549ee7aa56979e10e0b353044949ccb3ad42c7e

General

Target

f3f2db53df6a8bfacad1f9505974507b_JaffaCakes118.exe
Size

13.8MB
MD5

f3f2db53df6a8bfacad1f9505974507b
SHA1

af188ac402c82241975cb6ff17faf8314fd6c80d
SHA256

610cb49791e670b6896af06ee549ee7aa56979e10e0b353044949ccb3ad42c7e
SHA512

a1ec956694c021bb4a89c1b0543e52462461e2ffcc70f04ea29a3f4c509784e65997602835df1867905e2cc466c1f8bd8d7755abee8d3a33ce02ab40a38426e4
SSDEEP

49152:cjrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrn:W

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

1000 netsh.exe

pid	process
1000	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\qljxajsp\ImagePath = "C:\\Windows\\SysWOW64\\qljxajsp\\wijdyuvs.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:

f3f2db53df6a8bfacad1f9505974507b_JaffaCakes118.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3198953144-1466794930-246379610-1000\Control Panel\International\Geo\Nation	f3f2db53df6a8bfacad1f9505974507b_JaffaCakes118.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

4672 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

wijdyuvs.exe

pid process

4896 wijdyuvs.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

wijdyuvs.exe

description pid process target process

PID 4896 set thread context of 4672 4896 wijdyuvs.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

2680 sc.exe
816 sc.exe
3592 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
4672	svchost.exe

pid	process
4896	wijdyuvs.exe

description	pid	process	target process
PID 4896 set thread context of 4672	4896	wijdyuvs.exe	svchost.exe

pid	process
2680	sc.exe
816	sc.exe
3592	sc.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

f3f2db53df6a8bfacad1f9505974507b_JaffaCakes118.exewijdyuvs.exe

description	pid	process	target process
PID 1240 wrote to memory of 1804	1240	f3f2db53df6a8bfacad1f9505974507b_JaffaCakes118.exe	cmd.exe
PID 1240 wrote to memory of 1804	1240	f3f2db53df6a8bfacad1f9505974507b_JaffaCakes118.exe	cmd.exe
PID 1240 wrote to memory of 1804	1240	f3f2db53df6a8bfacad1f9505974507b_JaffaCakes118.exe	cmd.exe
PID 1240 wrote to memory of 4808	1240	f3f2db53df6a8bfacad1f9505974507b_JaffaCakes118.exe	cmd.exe
PID 1240 wrote to memory of 4808	1240	f3f2db53df6a8bfacad1f9505974507b_JaffaCakes118.exe	cmd.exe
PID 1240 wrote to memory of 4808	1240	f3f2db53df6a8bfacad1f9505974507b_JaffaCakes118.exe	cmd.exe
PID 1240 wrote to memory of 3592	1240	f3f2db53df6a8bfacad1f9505974507b_JaffaCakes118.exe	sc.exe
PID 1240 wrote to memory of 3592	1240	f3f2db53df6a8bfacad1f9505974507b_JaffaCakes118.exe	sc.exe
PID 1240 wrote to memory of 3592	1240	f3f2db53df6a8bfacad1f9505974507b_JaffaCakes118.exe	sc.exe
PID 1240 wrote to memory of 2680	1240	f3f2db53df6a8bfacad1f9505974507b_JaffaCakes118.exe	sc.exe
PID 1240 wrote to memory of 2680	1240	f3f2db53df6a8bfacad1f9505974507b_JaffaCakes118.exe	sc.exe
PID 1240 wrote to memory of 2680	1240	f3f2db53df6a8bfacad1f9505974507b_JaffaCakes118.exe	sc.exe
PID 1240 wrote to memory of 816	1240	f3f2db53df6a8bfacad1f9505974507b_JaffaCakes118.exe	sc.exe
PID 1240 wrote to memory of 816	1240	f3f2db53df6a8bfacad1f9505974507b_JaffaCakes118.exe	sc.exe
PID 1240 wrote to memory of 816	1240	f3f2db53df6a8bfacad1f9505974507b_JaffaCakes118.exe	sc.exe
PID 1240 wrote to memory of 1000	1240	f3f2db53df6a8bfacad1f9505974507b_JaffaCakes118.exe	netsh.exe
PID 1240 wrote to memory of 1000	1240	f3f2db53df6a8bfacad1f9505974507b_JaffaCakes118.exe	netsh.exe
PID 1240 wrote to memory of 1000	1240	f3f2db53df6a8bfacad1f9505974507b_JaffaCakes118.exe	netsh.exe
PID 4896 wrote to memory of 4672	4896	wijdyuvs.exe	svchost.exe
PID 4896 wrote to memory of 4672	4896	wijdyuvs.exe	svchost.exe
PID 4896 wrote to memory of 4672	4896	wijdyuvs.exe	svchost.exe
PID 4896 wrote to memory of 4672	4896	wijdyuvs.exe	svchost.exe
PID 4896 wrote to memory of 4672	4896	wijdyuvs.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\f3f2db53df6a8bfacad1f9505974507b_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f3f2db53df6a8bfacad1f9505974507b_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1240

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\qljxajsp\
2⤵
PID:1804

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\wijdyuvs.exe" C:\Windows\SysWOW64\qljxajsp\
2⤵
PID:4808

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create qljxajsp binPath= "C:\Windows\SysWOW64\qljxajsp\wijdyuvs.exe /d\"C:\Users\Admin\AppData\Local\Temp\f3f2db53df6a8bfacad1f9505974507b_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:3592

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description qljxajsp "wifi internet conection"
2⤵
- Launches sc.exe
PID:2680

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start qljxajsp
2⤵
- Launches sc.exe
PID:816

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:1000

C:\Windows\SysWOW64\qljxajsp\wijdyuvs.exe
C:\Windows\SysWOW64\qljxajsp\wijdyuvs.exe /d"C:\Users\Admin\AppData\Local\Temp\f3f2db53df6a8bfacad1f9505974507b_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4896

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
- Deletes itself
PID:4672

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\wijdyuvs.exe
Filesize
11.9MB

MD5
4ae26df2155ca5113a6e89a3282d2a5e

SHA1
2e10cba82015bae0c26bbc0ad5443b57fcbc43f3

SHA256
43e33a702d4a434826f2e70fab36b0ca8f21e4b9f3b8d87740b588aa2b596e87

SHA512
4bc92daebd431fceb8515c6a1008bcf51168059c9b6f91be77d27776dc7b94728a480d040f85c91aaa7a244bbf56c30c26f67fd5a99b8697a9027dd974fc4246

Download Submit
memory/1240-2-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/1240-1-0x00000000005B0000-0x00000000005B1000-memory.dmp

Filesize
4KB

Download
memory/1240-3-0x00000000005C0000-0x00000000005C1000-memory.dmp

Filesize
4KB

Download
memory/1240-6-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/1240-0-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/4672-16-0x0000000001260000-0x0000000001275000-memory.dmp

Filesize
84KB

Download
memory/4672-18-0x0000000001260000-0x0000000001275000-memory.dmp

Filesize
84KB

Download
memory/4672-11-0x0000000001260000-0x0000000001275000-memory.dmp

Filesize
84KB

Download
memory/4672-17-0x0000000001260000-0x0000000001275000-memory.dmp

Filesize
84KB

Download
memory/4672-15-0x0000000001260000-0x0000000001275000-memory.dmp

Filesize
84KB

Download
memory/4896-8-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/4896-12-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/4896-10-0x0000000000590000-0x0000000000591000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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