tofsee | 42ebc1e3ce246575703ca88ab049be62f7a729ac743f5f9e6a45e68d04fec38a

Analysis

max time kernel
146s
max time network
144s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
21/04/2024, 04:34

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General

Target
fe71a5cc8c5564f2e1b9e4e63eb48fc5_JaffaCakes118.exe
Size 12.2MB
Sample240421-e64k8abe81
SHA256 42ebc1e3ce246575703ca88ab049be62f7a729ac743f5f9e6a45e68d04fec38a
MD5 fe71a5cc8c5564f2e1b9e4e63eb48fc5
SHA1 ae2f00b7bc2fb6cbfae3622b6031c5bb411e0bc5
SHA512 fda1dcb122f442540741567cd4b4c8b452648742df2701494c88c6a296d878a900b7dc65831f4497fe95acf48567b71d1248e23aabc6bc45aef3614fc075a3c4
SSDEEP 393216:Muuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu:
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\eiumrbav = "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
2860	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\eiumrbav\ImagePath = "C:\\Windows\\SysWOW64\\eiumrbav\\nzgaflyg.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2632	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2628	nzgaflyg.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2628 set thread context of 2632	2628	nzgaflyg.exe	39

Launches sc.exe 3 IoCs

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

pid	Process
3052	sc.exe
2160	sc.exe
2548	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 3060 wrote to memory of 2188	3060	fe71a5cc8c5564f2e1b9e4e63eb48fc5_JaffaCakes118.exe	28
PID 3060 wrote to memory of 2188	3060	fe71a5cc8c5564f2e1b9e4e63eb48fc5_JaffaCakes118.exe	28
PID 3060 wrote to memory of 2188	3060	fe71a5cc8c5564f2e1b9e4e63eb48fc5_JaffaCakes118.exe	28
PID 3060 wrote to memory of 2188	3060	fe71a5cc8c5564f2e1b9e4e63eb48fc5_JaffaCakes118.exe	28
PID 3060 wrote to memory of 1696	3060	fe71a5cc8c5564f2e1b9e4e63eb48fc5_JaffaCakes118.exe	30
PID 3060 wrote to memory of 1696	3060	fe71a5cc8c5564f2e1b9e4e63eb48fc5_JaffaCakes118.exe	30
PID 3060 wrote to memory of 1696	3060	fe71a5cc8c5564f2e1b9e4e63eb48fc5_JaffaCakes118.exe	30
PID 3060 wrote to memory of 1696	3060	fe71a5cc8c5564f2e1b9e4e63eb48fc5_JaffaCakes118.exe	30
PID 3060 wrote to memory of 3052	3060	fe71a5cc8c5564f2e1b9e4e63eb48fc5_JaffaCakes118.exe	32
PID 3060 wrote to memory of 3052	3060	fe71a5cc8c5564f2e1b9e4e63eb48fc5_JaffaCakes118.exe	32
PID 3060 wrote to memory of 3052	3060	fe71a5cc8c5564f2e1b9e4e63eb48fc5_JaffaCakes118.exe	32
PID 3060 wrote to memory of 3052	3060	fe71a5cc8c5564f2e1b9e4e63eb48fc5_JaffaCakes118.exe	32
PID 3060 wrote to memory of 2160	3060	fe71a5cc8c5564f2e1b9e4e63eb48fc5_JaffaCakes118.exe	34
PID 3060 wrote to memory of 2160	3060	fe71a5cc8c5564f2e1b9e4e63eb48fc5_JaffaCakes118.exe	34
PID 3060 wrote to memory of 2160	3060	fe71a5cc8c5564f2e1b9e4e63eb48fc5_JaffaCakes118.exe	34
PID 3060 wrote to memory of 2160	3060	fe71a5cc8c5564f2e1b9e4e63eb48fc5_JaffaCakes118.exe	34
PID 3060 wrote to memory of 2548	3060	fe71a5cc8c5564f2e1b9e4e63eb48fc5_JaffaCakes118.exe	36
PID 3060 wrote to memory of 2548	3060	fe71a5cc8c5564f2e1b9e4e63eb48fc5_JaffaCakes118.exe	36
PID 3060 wrote to memory of 2548	3060	fe71a5cc8c5564f2e1b9e4e63eb48fc5_JaffaCakes118.exe	36
PID 3060 wrote to memory of 2548	3060	fe71a5cc8c5564f2e1b9e4e63eb48fc5_JaffaCakes118.exe	36
PID 2628 wrote to memory of 2632	2628	nzgaflyg.exe	39
PID 2628 wrote to memory of 2632	2628	nzgaflyg.exe	39
PID 2628 wrote to memory of 2632	2628	nzgaflyg.exe	39
PID 2628 wrote to memory of 2632	2628	nzgaflyg.exe	39
PID 2628 wrote to memory of 2632	2628	nzgaflyg.exe	39
PID 2628 wrote to memory of 2632	2628	nzgaflyg.exe	39
PID 3060 wrote to memory of 2860	3060	fe71a5cc8c5564f2e1b9e4e63eb48fc5_JaffaCakes118.exe	40
PID 3060 wrote to memory of 2860	3060	fe71a5cc8c5564f2e1b9e4e63eb48fc5_JaffaCakes118.exe	40
PID 3060 wrote to memory of 2860	3060	fe71a5cc8c5564f2e1b9e4e63eb48fc5_JaffaCakes118.exe	40
PID 3060 wrote to memory of 2860	3060	fe71a5cc8c5564f2e1b9e4e63eb48fc5_JaffaCakes118.exe	40

C:\Users\Admin\AppData\Local\Temp\fe71a5cc8c5564f2e1b9e4e63eb48fc5_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\fe71a5cc8c5564f2e1b9e4e63eb48fc5_JaffaCakes118.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3060
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\eiumrbav\
  2⤵
  PID:2188
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\nzgaflyg.exe" C:\Windows\SysWOW64\eiumrbav\
  2⤵
  PID:1696
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create eiumrbav binPath= "C:\Windows\SysWOW64\eiumrbav\nzgaflyg.exe /d\"C:\Users\Admin\AppData\Local\Temp\fe71a5cc8c5564f2e1b9e4e63eb48fc5_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:3052
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description eiumrbav "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:2160
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start eiumrbav
  2⤵
  - Launches sc.exe
  PID:2548
- 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:2860

C:\Windows\SysWOW64\eiumrbav\nzgaflyg.exe
C:\Windows\SysWOW64\eiumrbav\nzgaflyg.exe /d"C:\Users\Admin\AppData\Local\Temp\fe71a5cc8c5564f2e1b9e4e63eb48fc5_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2628
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Windows security bypass
  - Sets service image path in registry
  - Deletes itself
  PID:2632

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

nzgaflyg.exe

Path C:\Users\Admin\AppData\Local\Temp\nzgaflyg.exe
Size 14.4MB
SHA256 6b5823cf9117d0e918359467755e17586bc495169fa25a26167b68ec65934f1b
MD5 c1af8bf24e84ff63acb85c427d678146
SHA1 7f997b621374183fab7b216b74acdd10fd473f74
SHA512 9fc40d6fd2c34afbfdad8670496e935c4e1d3df6ac34e1c42ad88b548e24d2580397dab215d4ef4fbc722544de40ab3ff9eea102ee04e2f51b71c2133be34dea
SSDEEP 393216:7uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuW:
MD5 SHA1 SHA512 SSDEEP

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memory/2628-16-0x0000000000400000-0x0000000002CB9000-memory.dmp

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memory/2628-9-0x00000000002B0000-0x00000000003B0000-memory.dmp

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memory/2628-14-0x0000000000400000-0x0000000002CB9000-memory.dmp

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memory/2632-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

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memory/2632-8-0x0000000000080000-0x0000000000095000-memory.dmp

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memory/2632-12-0x0000000000080000-0x0000000000095000-memory.dmp

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memory/2632-18-0x0000000000080000-0x0000000000095000-memory.dmp

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memory/2632-19-0x0000000000080000-0x0000000000095000-memory.dmp

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memory/2632-20-0x0000000000080000-0x0000000000095000-memory.dmp

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memory/2632-21-0x0000000000080000-0x0000000000095000-memory.dmp

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memory/3060-4-0x0000000000400000-0x0000000002CB9000-memory.dmp

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memory/3060-3-0x0000000000220000-0x0000000000233000-memory.dmp

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memory/3060-1-0x0000000002E00000-0x0000000002F00000-memory.dmp

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memory/3060-17-0x0000000000400000-0x0000000002CB9000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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