tofsee | be08b1f6756d1985393042730c68972c4e144c7af06c20910b73ac43cea1f38d

Analysis

max time kernel
151s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
19/04/2024, 11:13

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General

Target
fa2cfe80ce726ca4c7c3ed8013a39903_JaffaCakes118.exe
Size 12.3MB
Sample240419-nbxc4aac32
SHA256 be08b1f6756d1985393042730c68972c4e144c7af06c20910b73ac43cea1f38d
MD5 fa2cfe80ce726ca4c7c3ed8013a39903
SHA1 f185e4e2c7b0752c38db7f6082142716b886c449
SHA512 434b1a78e04bd240548d8bc5c6cd63b5992dcbb08f026b3b8a59e81c8c005e34a2b03aac7bc096270a170c68f83871cc8cf3c87297c4d0cf0916e57d6b0de9bc
SSDEEP 24576:BerU5sWbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb3:BsW
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

defeatwax.ru
refabyd.info

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
4372	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\ynbvesnv\ImagePath = "C:\\Windows\\SysWOW64\\ynbvesnv\\idnqeppx.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-1-5-21-1826666146-2574340311-1877551059-1000\Control Panel\International\Geo\Nation	fa2cfe80ce726ca4c7c3ed8013a39903_JaffaCakes118.exe

Executes dropped EXE 1 IoCs

pid	Process
4628	idnqeppx.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4628 set thread context of 4464	4628	idnqeppx.exe	98

Launches sc.exe 3 IoCs

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

pid	Process
3996	sc.exe
4280	sc.exe
3236	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 4668 wrote to memory of 2256	4668	fa2cfe80ce726ca4c7c3ed8013a39903_JaffaCakes118.exe	85
PID 4668 wrote to memory of 2256	4668	fa2cfe80ce726ca4c7c3ed8013a39903_JaffaCakes118.exe	85
PID 4668 wrote to memory of 2256	4668	fa2cfe80ce726ca4c7c3ed8013a39903_JaffaCakes118.exe	85
PID 4668 wrote to memory of 944	4668	fa2cfe80ce726ca4c7c3ed8013a39903_JaffaCakes118.exe	87
PID 4668 wrote to memory of 944	4668	fa2cfe80ce726ca4c7c3ed8013a39903_JaffaCakes118.exe	87
PID 4668 wrote to memory of 944	4668	fa2cfe80ce726ca4c7c3ed8013a39903_JaffaCakes118.exe	87
PID 4668 wrote to memory of 4280	4668	fa2cfe80ce726ca4c7c3ed8013a39903_JaffaCakes118.exe	89
PID 4668 wrote to memory of 4280	4668	fa2cfe80ce726ca4c7c3ed8013a39903_JaffaCakes118.exe	89
PID 4668 wrote to memory of 4280	4668	fa2cfe80ce726ca4c7c3ed8013a39903_JaffaCakes118.exe	89
PID 4668 wrote to memory of 3236	4668	fa2cfe80ce726ca4c7c3ed8013a39903_JaffaCakes118.exe	91
PID 4668 wrote to memory of 3236	4668	fa2cfe80ce726ca4c7c3ed8013a39903_JaffaCakes118.exe	91
PID 4668 wrote to memory of 3236	4668	fa2cfe80ce726ca4c7c3ed8013a39903_JaffaCakes118.exe	91
PID 4668 wrote to memory of 3996	4668	fa2cfe80ce726ca4c7c3ed8013a39903_JaffaCakes118.exe	93
PID 4668 wrote to memory of 3996	4668	fa2cfe80ce726ca4c7c3ed8013a39903_JaffaCakes118.exe	93
PID 4668 wrote to memory of 3996	4668	fa2cfe80ce726ca4c7c3ed8013a39903_JaffaCakes118.exe	93
PID 4668 wrote to memory of 4372	4668	fa2cfe80ce726ca4c7c3ed8013a39903_JaffaCakes118.exe	96
PID 4668 wrote to memory of 4372	4668	fa2cfe80ce726ca4c7c3ed8013a39903_JaffaCakes118.exe	96
PID 4668 wrote to memory of 4372	4668	fa2cfe80ce726ca4c7c3ed8013a39903_JaffaCakes118.exe	96
PID 4628 wrote to memory of 4464	4628	idnqeppx.exe	98
PID 4628 wrote to memory of 4464	4628	idnqeppx.exe	98
PID 4628 wrote to memory of 4464	4628	idnqeppx.exe	98
PID 4628 wrote to memory of 4464	4628	idnqeppx.exe	98
PID 4628 wrote to memory of 4464	4628	idnqeppx.exe	98

C:\Users\Admin\AppData\Local\Temp\fa2cfe80ce726ca4c7c3ed8013a39903_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\fa2cfe80ce726ca4c7c3ed8013a39903_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4668
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ynbvesnv\
  2⤵
  PID:2256
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\idnqeppx.exe" C:\Windows\SysWOW64\ynbvesnv\
  2⤵
  PID:944
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create ynbvesnv binPath= "C:\Windows\SysWOW64\ynbvesnv\idnqeppx.exe /d\"C:\Users\Admin\AppData\Local\Temp\fa2cfe80ce726ca4c7c3ed8013a39903_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:4280
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description ynbvesnv "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:3236
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start ynbvesnv
  2⤵
  - Launches sc.exe
  PID:3996
- 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:4372

C:\Windows\SysWOW64\ynbvesnv\idnqeppx.exe
C:\Windows\SysWOW64\ynbvesnv\idnqeppx.exe /d"C:\Users\Admin\AppData\Local\Temp\fa2cfe80ce726ca4c7c3ed8013a39903_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4628
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  PID:4464

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

idnqeppx.exe

Path C:\Users\Admin\AppData\Local\Temp\idnqeppx.exe
Size 13.3MB
SHA256 be76ee2a4c1991332f83e84388041faf65f881cf447739a17090da870b42daca
MD5 edaeeb1c1c5cb0a454a80ffe641a7364
SHA1 cc34dd07c1e72c8232c9f850a7fe65c77315c2be
SHA512 0ccaa533095fe61475aabbf072967d29d9d1428650d835c3ea23eb2a90b494fc494ec40308567a9adf2f3ee006911ab1b47e0737455a42a6d73d572a4bfa5c53
SSDEEP 24576:uerU5sWbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb7:usW
MD5 SHA1 SHA512 SSDEEP

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memory/4464-18-0x0000000000860000-0x0000000000875000-memory.dmp

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memory/4464-17-0x0000000000860000-0x0000000000875000-memory.dmp

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memory/4464-26-0x0000000000860000-0x0000000000875000-memory.dmp

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memory/4464-12-0x0000000000860000-0x0000000000875000-memory.dmp

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memory/4464-15-0x0000000000860000-0x0000000000875000-memory.dmp

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memory/4628-9-0x00000000004B0000-0x00000000005B0000-memory.dmp

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memory/4628-11-0x0000000000400000-0x000000000046D000-memory.dmp

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memory/4628-10-0x00000000005F0000-0x0000000000603000-memory.dmp

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memory/4628-19-0x0000000000400000-0x000000000046D000-memory.dmp

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memory/4668-3-0x00000000004F0000-0x0000000000503000-memory.dmp

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memory/4668-2-0x0000000000400000-0x000000000046D000-memory.dmp

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memory/4668-16-0x0000000000400000-0x000000000046D000-memory.dmp

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memory/4668-1-0x0000000000520000-0x0000000000620000-memory.dmp

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memory/4668-23-0x0000000000520000-0x0000000000620000-memory.dmp

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memory/4668-4-0x0000000000400000-0x000000000046D000-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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