tofsee | cda2e2bc07f9772d45f63b77f0b0d1754b8a10fa1420b68afb10a8b71f9b8e50

Analysis

max time kernel
149s
max time network
154s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
19/04/2024, 14:18

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General

Target
fa7c6161052a1f948ae77285e7bf45ed_JaffaCakes118.exe
Size 12.0MB
Sample240419-rl82esee32
SHA256 cda2e2bc07f9772d45f63b77f0b0d1754b8a10fa1420b68afb10a8b71f9b8e50
MD5 fa7c6161052a1f948ae77285e7bf45ed
SHA1 366b0ba9f8fb650ff2b6e69b288037c4d2d12118
SHA512 66c062616dd3df436c4829ad48771b782c688066dcee9c73446d1e326efe13d4da7a253a01b8904bfd6b2fc08a782b607b843542a91175df5ec68e9b51df9ae8
SSDEEP 196608:4Lad4qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqn:4L
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

Windows security bypass 2 TTPs 1 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\SysWOW64\nbmtcfsk = "0"	svchost.exe

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
2368	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\nbmtcfsk\ImagePath = "C:\\Windows\\SysWOW64\\nbmtcfsk\\pwiversm.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2328	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2712	pwiversm.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2712 set thread context of 2328	2712	pwiversm.exe	41

Launches sc.exe 3 IoCs

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

pid	Process
2340	sc.exe
2556	sc.exe
2472	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 30 IoCs

description	pid	Process	procid_target
PID 2300 wrote to memory of 2688	2300	fa7c6161052a1f948ae77285e7bf45ed_JaffaCakes118.exe	28
PID 2300 wrote to memory of 2688	2300	fa7c6161052a1f948ae77285e7bf45ed_JaffaCakes118.exe	28
PID 2300 wrote to memory of 2688	2300	fa7c6161052a1f948ae77285e7bf45ed_JaffaCakes118.exe	28
PID 2300 wrote to memory of 2688	2300	fa7c6161052a1f948ae77285e7bf45ed_JaffaCakes118.exe	28
PID 2300 wrote to memory of 2956	2300	fa7c6161052a1f948ae77285e7bf45ed_JaffaCakes118.exe	30
PID 2300 wrote to memory of 2956	2300	fa7c6161052a1f948ae77285e7bf45ed_JaffaCakes118.exe	30
PID 2300 wrote to memory of 2956	2300	fa7c6161052a1f948ae77285e7bf45ed_JaffaCakes118.exe	30
PID 2300 wrote to memory of 2956	2300	fa7c6161052a1f948ae77285e7bf45ed_JaffaCakes118.exe	30
PID 2300 wrote to memory of 2556	2300	fa7c6161052a1f948ae77285e7bf45ed_JaffaCakes118.exe	32
PID 2300 wrote to memory of 2556	2300	fa7c6161052a1f948ae77285e7bf45ed_JaffaCakes118.exe	32
PID 2300 wrote to memory of 2556	2300	fa7c6161052a1f948ae77285e7bf45ed_JaffaCakes118.exe	32
PID 2300 wrote to memory of 2556	2300	fa7c6161052a1f948ae77285e7bf45ed_JaffaCakes118.exe	32
PID 2300 wrote to memory of 2472	2300	fa7c6161052a1f948ae77285e7bf45ed_JaffaCakes118.exe	34
PID 2300 wrote to memory of 2472	2300	fa7c6161052a1f948ae77285e7bf45ed_JaffaCakes118.exe	34
PID 2300 wrote to memory of 2472	2300	fa7c6161052a1f948ae77285e7bf45ed_JaffaCakes118.exe	34
PID 2300 wrote to memory of 2472	2300	fa7c6161052a1f948ae77285e7bf45ed_JaffaCakes118.exe	34
PID 2300 wrote to memory of 2340	2300	fa7c6161052a1f948ae77285e7bf45ed_JaffaCakes118.exe	36
PID 2300 wrote to memory of 2340	2300	fa7c6161052a1f948ae77285e7bf45ed_JaffaCakes118.exe	36
PID 2300 wrote to memory of 2340	2300	fa7c6161052a1f948ae77285e7bf45ed_JaffaCakes118.exe	36
PID 2300 wrote to memory of 2340	2300	fa7c6161052a1f948ae77285e7bf45ed_JaffaCakes118.exe	36
PID 2300 wrote to memory of 2368	2300	fa7c6161052a1f948ae77285e7bf45ed_JaffaCakes118.exe	38
PID 2300 wrote to memory of 2368	2300	fa7c6161052a1f948ae77285e7bf45ed_JaffaCakes118.exe	38
PID 2300 wrote to memory of 2368	2300	fa7c6161052a1f948ae77285e7bf45ed_JaffaCakes118.exe	38
PID 2300 wrote to memory of 2368	2300	fa7c6161052a1f948ae77285e7bf45ed_JaffaCakes118.exe	38
PID 2712 wrote to memory of 2328	2712	pwiversm.exe	41
PID 2712 wrote to memory of 2328	2712	pwiversm.exe	41
PID 2712 wrote to memory of 2328	2712	pwiversm.exe	41
PID 2712 wrote to memory of 2328	2712	pwiversm.exe	41
PID 2712 wrote to memory of 2328	2712	pwiversm.exe	41
PID 2712 wrote to memory of 2328	2712	pwiversm.exe	41

C:\Users\Admin\AppData\Local\Temp\fa7c6161052a1f948ae77285e7bf45ed_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\fa7c6161052a1f948ae77285e7bf45ed_JaffaCakes118.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2300
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\nbmtcfsk\
  2⤵
  PID:2688
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\pwiversm.exe" C:\Windows\SysWOW64\nbmtcfsk\
  2⤵
  PID:2956
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create nbmtcfsk binPath= "C:\Windows\SysWOW64\nbmtcfsk\pwiversm.exe /d\"C:\Users\Admin\AppData\Local\Temp\fa7c6161052a1f948ae77285e7bf45ed_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:2556
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description nbmtcfsk "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:2472
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start nbmtcfsk
  2⤵
  - Launches sc.exe
  PID:2340
- 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:2368

C:\Windows\SysWOW64\nbmtcfsk\pwiversm.exe
C:\Windows\SysWOW64\nbmtcfsk\pwiversm.exe /d"C:\Users\Admin\AppData\Local\Temp\fa7c6161052a1f948ae77285e7bf45ed_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2712
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Windows security bypass
  - Sets service image path in registry
  - Deletes itself
  PID:2328

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

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

pwiversm.exe

Path C:\Users\Admin\AppData\Local\Temp\pwiversm.exe
Size 13.5MB
SHA256 4e82474b67514d73fb3912ddedef15512c9011f759ae6be195381cf725d5a923
MD5 dcaa77b65d4bb1a688ebe39375c5ebf8
SHA1 a0716ff191cf28da2ee19c8e0887ed322ede21ad
SHA512 8d11d54372b459e50c920ad3bb4d6fa7bd52384d76dd5a36fa4d9ec2af73d997a11b2aa041d47603e8f5824e6c79b7122ad28efd8eb994b9ac80fa438728bc58
SSDEEP 196608:jLad4qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq6:jL
MD5 SHA1 SHA512 SSDEEP

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memory/2300-1-0x0000000000950000-0x0000000000A50000-memory.dmp

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memory/2300-2-0x0000000000020000-0x0000000000033000-memory.dmp

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memory/2300-4-0x0000000000400000-0x0000000000871000-memory.dmp

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memory/2300-6-0x0000000000400000-0x0000000000871000-memory.dmp

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memory/2300-8-0x0000000000020000-0x0000000000033000-memory.dmp

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memory/2328-15-0x0000000000080000-0x0000000000095000-memory.dmp

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memory/2328-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

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memory/2328-11-0x0000000000080000-0x0000000000095000-memory.dmp

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memory/2328-20-0x0000000000080000-0x0000000000095000-memory.dmp

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memory/2328-21-0x0000000000080000-0x0000000000095000-memory.dmp

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memory/2328-22-0x0000000000080000-0x0000000000095000-memory.dmp

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memory/2712-10-0x00000000009B0000-0x0000000000AB0000-memory.dmp

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memory/2712-14-0x0000000000400000-0x0000000000871000-memory.dmp

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memory/2712-16-0x0000000000400000-0x0000000000871000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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