tofsee | f8b2c110a680ee0fad4fc129351ad835fb959bc6ad5c99aa707aec7887affee9

Analysis

max time kernel
148s
max time network
127s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
16/04/2024, 00:47

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General

Target
f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe
Size 12.0MB
Sample240416-a5dk7aef9s
SHA256 f8b2c110a680ee0fad4fc129351ad835fb959bc6ad5c99aa707aec7887affee9
MD5 f24e01b5427f0548a8b5fcb06a03d6cb
SHA1 c1225c08af8b71beeb8e934038ca10b8edcce686
SHA512 09d65fa5696a76932abdb0e5e647592a643baa3080205ce1d4eea58123e21d92776c002aba63c68fe1f1bc407963803e2913e5db11e5e80a909cc0ab139191a1
SSDEEP 24576:cT8rgnPp+RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRf:sp+
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

43.231.4.6
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

pid	Process
2040	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\grmbbxyb\ImagePath = "C:\\Windows\\SysWOW64\\grmbbxyb\\vzgqerzp.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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2177723727-746291240-1644359950-1000\Control Panel\International\Geo\Nation	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
4084	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2280	vzgqerzp.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2280 set thread context of 4084	2280	vzgqerzp.exe	106

Launches sc.exe 3 IoCs

Sc.exe is a Windows utlilty to control services on the system.

pid	Process
4832	sc.exe
3168	sc.exe
804	sc.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4796 wrote to memory of 3912	4796	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	93
PID 4796 wrote to memory of 3912	4796	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	93
PID 4796 wrote to memory of 3912	4796	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	93
PID 4796 wrote to memory of 4472	4796	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	95
PID 4796 wrote to memory of 4472	4796	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	95
PID 4796 wrote to memory of 4472	4796	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	95
PID 4796 wrote to memory of 4832	4796	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	97
PID 4796 wrote to memory of 4832	4796	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	97
PID 4796 wrote to memory of 4832	4796	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	97
PID 4796 wrote to memory of 3168	4796	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	99
PID 4796 wrote to memory of 3168	4796	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	99
PID 4796 wrote to memory of 3168	4796	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	99
PID 4796 wrote to memory of 804	4796	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	101
PID 4796 wrote to memory of 804	4796	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	101
PID 4796 wrote to memory of 804	4796	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	101
PID 4796 wrote to memory of 2040	4796	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	104
PID 4796 wrote to memory of 2040	4796	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	104
PID 4796 wrote to memory of 2040	4796	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	104
PID 2280 wrote to memory of 4084	2280	vzgqerzp.exe	106
PID 2280 wrote to memory of 4084	2280	vzgqerzp.exe	106
PID 2280 wrote to memory of 4084	2280	vzgqerzp.exe	106
PID 2280 wrote to memory of 4084	2280	vzgqerzp.exe	106
PID 2280 wrote to memory of 4084	2280	vzgqerzp.exe	106

C:\Users\Admin\AppData\Local\Temp\f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4796
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\grmbbxyb\
  2⤵
  PID:3912
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vzgqerzp.exe" C:\Windows\SysWOW64\grmbbxyb\
  2⤵
  PID:4472
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create grmbbxyb binPath= "C:\Windows\SysWOW64\grmbbxyb\vzgqerzp.exe /d\"C:\Users\Admin\AppData\Local\Temp\f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:4832
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description grmbbxyb "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:3168
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start grmbbxyb
  2⤵
  - Launches sc.exe
  PID:804
- 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:2040

C:\Windows\SysWOW64\grmbbxyb\vzgqerzp.exe
C:\Windows\SysWOW64\grmbbxyb\vzgqerzp.exe /d"C:\Users\Admin\AppData\Local\Temp\f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2280
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:4084

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Defense Evasion

Impair Defenses

T1562

Disable or Modify System Firewall

T1562.004

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

vzgqerzp.exe

Path C:\Users\Admin\AppData\Local\Temp\vzgqerzp.exe
Size 14.8MB
SHA256 fff16312237bdb87a36a151ee4ce6b8cdb28f28afaf4a9210d8cddacb14a8cf0
MD5 35089220ecd1f34b808f856a091f1c13
SHA1 b2c200c81f9e9987238d1c867dbff34f0af35101
SHA512 81c13d6add678575cefee378335e4e694377f8c8712297433ca09e88cdad9af99805bb394a1a3a8e511ae0f75b63a1a7261a6dbf36ccb2a7088c69e1778a15ae
SSDEEP 24576:VT8rgnPp+RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR:bp+
MD5 SHA1 SHA512 SSDEEP

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memory/2280-14-0x0000000000400000-0x00000000008EE000-memory.dmp

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memory/2280-11-0x0000000000AC0000-0x0000000000BC0000-memory.dmp

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memory/2280-13-0x0000000000400000-0x00000000008EE000-memory.dmp

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memory/4084-10-0x0000000000F00000-0x0000000000F15000-memory.dmp

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memory/4084-17-0x0000000000F00000-0x0000000000F15000-memory.dmp

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memory/4084-18-0x0000000000F00000-0x0000000000F15000-memory.dmp

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memory/4084-19-0x0000000000F00000-0x0000000000F15000-memory.dmp

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memory/4796-4-0x0000000000400000-0x00000000008EE000-memory.dmp

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memory/4796-2-0x0000000000A90000-0x0000000000AA3000-memory.dmp

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memory/4796-7-0x0000000000400000-0x00000000008EE000-memory.dmp

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memory/4796-8-0x0000000000A90000-0x0000000000AA3000-memory.dmp

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memory/4796-1-0x0000000000AE0000-0x0000000000BE0000-memory.dmp

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Analysis

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General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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