tofsee | 9147b2e4d0e04f288700b09606af79a3fdab6b6e8e69495a8ef868481d544beb

General

Target

8066071ebc2261fb9fa7bc095950e7a4_JaffaCakes118.exe
Size

142KB
MD5

8066071ebc2261fb9fa7bc095950e7a4
SHA1

385ece42d14ed13dd1911bc78405448f2cc2c5d5
SHA256

9147b2e4d0e04f288700b09606af79a3fdab6b6e8e69495a8ef868481d544beb
SHA512

3b6061ccbc73cc280412177f7569f0af13d14c75425998f043702d97ac33d880ca2d2a21f3fadfa46acb266e82b75d9e2f811122daab48e7dac080bc67fa1511
SSDEEP

3072:LO8/FLfg76rzTkYfiL2+jKfgi4m5nuGFU6W6WN06b37:B9pzwFLnKP46uC

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

1144 netsh.exe

pid	process
1144	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\ssusjrvi\ImagePath = "C:\\Windows\\SysWOW64\\ssusjrvi\\trfrsnlr.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:

8066071ebc2261fb9fa7bc095950e7a4_JaffaCakes118.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3906287020-2915474608-1755617787-1000\Control Panel\International\Geo\Nation	8066071ebc2261fb9fa7bc095950e7a4_JaffaCakes118.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

4348 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

trfrsnlr.exe

pid process

972 trfrsnlr.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

trfrsnlr.exe

description pid process target process

PID 972 set thread context of 4348 972 trfrsnlr.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

3756 sc.exe
2532 sc.exe
2524 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
4348	svchost.exe

pid	process
972	trfrsnlr.exe

description	pid	process	target process
PID 972 set thread context of 4348	972	trfrsnlr.exe	svchost.exe

pid	process
3756	sc.exe
2532	sc.exe
2524	sc.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

8066071ebc2261fb9fa7bc095950e7a4_JaffaCakes118.exetrfrsnlr.exe

description	pid	process	target process
PID 2212 wrote to memory of 4496	2212	8066071ebc2261fb9fa7bc095950e7a4_JaffaCakes118.exe	cmd.exe
PID 2212 wrote to memory of 4496	2212	8066071ebc2261fb9fa7bc095950e7a4_JaffaCakes118.exe	cmd.exe
PID 2212 wrote to memory of 4496	2212	8066071ebc2261fb9fa7bc095950e7a4_JaffaCakes118.exe	cmd.exe
PID 2212 wrote to memory of 5080	2212	8066071ebc2261fb9fa7bc095950e7a4_JaffaCakes118.exe	cmd.exe
PID 2212 wrote to memory of 5080	2212	8066071ebc2261fb9fa7bc095950e7a4_JaffaCakes118.exe	cmd.exe
PID 2212 wrote to memory of 5080	2212	8066071ebc2261fb9fa7bc095950e7a4_JaffaCakes118.exe	cmd.exe
PID 2212 wrote to memory of 2524	2212	8066071ebc2261fb9fa7bc095950e7a4_JaffaCakes118.exe	sc.exe
PID 2212 wrote to memory of 2524	2212	8066071ebc2261fb9fa7bc095950e7a4_JaffaCakes118.exe	sc.exe
PID 2212 wrote to memory of 2524	2212	8066071ebc2261fb9fa7bc095950e7a4_JaffaCakes118.exe	sc.exe
PID 2212 wrote to memory of 3756	2212	8066071ebc2261fb9fa7bc095950e7a4_JaffaCakes118.exe	sc.exe
PID 2212 wrote to memory of 3756	2212	8066071ebc2261fb9fa7bc095950e7a4_JaffaCakes118.exe	sc.exe
PID 2212 wrote to memory of 3756	2212	8066071ebc2261fb9fa7bc095950e7a4_JaffaCakes118.exe	sc.exe
PID 2212 wrote to memory of 2532	2212	8066071ebc2261fb9fa7bc095950e7a4_JaffaCakes118.exe	sc.exe
PID 2212 wrote to memory of 2532	2212	8066071ebc2261fb9fa7bc095950e7a4_JaffaCakes118.exe	sc.exe
PID 2212 wrote to memory of 2532	2212	8066071ebc2261fb9fa7bc095950e7a4_JaffaCakes118.exe	sc.exe
PID 2212 wrote to memory of 1144	2212	8066071ebc2261fb9fa7bc095950e7a4_JaffaCakes118.exe	netsh.exe
PID 2212 wrote to memory of 1144	2212	8066071ebc2261fb9fa7bc095950e7a4_JaffaCakes118.exe	netsh.exe
PID 2212 wrote to memory of 1144	2212	8066071ebc2261fb9fa7bc095950e7a4_JaffaCakes118.exe	netsh.exe
PID 972 wrote to memory of 4348	972	trfrsnlr.exe	svchost.exe
PID 972 wrote to memory of 4348	972	trfrsnlr.exe	svchost.exe
PID 972 wrote to memory of 4348	972	trfrsnlr.exe	svchost.exe
PID 972 wrote to memory of 4348	972	trfrsnlr.exe	svchost.exe
PID 972 wrote to memory of 4348	972	trfrsnlr.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\8066071ebc2261fb9fa7bc095950e7a4_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\8066071ebc2261fb9fa7bc095950e7a4_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2212
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ssusjrvi\
  2⤵
  PID:4496
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\trfrsnlr.exe" C:\Windows\SysWOW64\ssusjrvi\
  2⤵
  PID:5080
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create ssusjrvi binPath= "C:\Windows\SysWOW64\ssusjrvi\trfrsnlr.exe /d\"C:\Users\Admin\AppData\Local\Temp\8066071ebc2261fb9fa7bc095950e7a4_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:2524
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description ssusjrvi "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:3756
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start ssusjrvi
  2⤵
  - Launches sc.exe
  PID:2532
- 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:1144

C:\Windows\SysWOW64\ssusjrvi\trfrsnlr.exe
C:\Windows\SysWOW64\ssusjrvi\trfrsnlr.exe /d"C:\Users\Admin\AppData\Local\Temp\8066071ebc2261fb9fa7bc095950e7a4_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:972
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:4348

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

1

T1569

Service Execution

1

T1569.002

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\trfrsnlr.exe

Filesize
11.1MB

MD5
a18c76087de2146a7286d1cf440221e9

SHA1
47b91e3a966db9df5f61e91756e7842c849c3dc5

SHA256
06f13042a539523cc4c57f2fcec94b4d12479500b0db8397ceda8bc01196fb43

SHA512
00cabbe8ab5070e74a7652b2ffea8eec14046bc72f1d254dc98bb980c2c85ce28a0d42efc6ab12d26ef480e54951f290c9a6527b0058a8b67b1c21ffba703378

Download Submit
memory/972-7-0x0000000000580000-0x0000000000581000-memory.dmp

Filesize
4KB

Download
memory/972-8-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/972-10-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/2212-0-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/2212-2-0x0000000000510000-0x0000000000511000-memory.dmp

Filesize
4KB

Download
memory/2212-1-0x0000000000500000-0x0000000000501000-memory.dmp

Filesize
4KB

Download
memory/2212-6-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/4348-9-0x00000000003E0000-0x00000000003F5000-memory.dmp

Filesize
84KB

Download
memory/4348-12-0x00000000003E0000-0x00000000003F5000-memory.dmp

Filesize
84KB

Download
memory/4348-13-0x00000000003E0000-0x00000000003F5000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads