tofsee | f8546b64a0638ffe8267be96d09cf4790b9a89b1719b105cd99fd84e554a04da

Analysis

max time kernel
145s
max time network
124s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
02/10/2024, 23:55

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General

Target
0cfc8367505b43f71a3e388531f840ad_JaffaCakes118.exe
Size 12.3MB
Sample241002-3ypzvsxdkh
SHA256 f8546b64a0638ffe8267be96d09cf4790b9a89b1719b105cd99fd84e554a04da
MD5 0cfc8367505b43f71a3e388531f840ad
SHA1 666f8624dd821294c0b212f430b8a1a676b55914
SHA512 daeb6fd6456767b77a97cfce33b9d411f77ae4259883e338caf83e329119f830132e49f30704593afbcd574b3575d5cceb299a446ea04d0cad94f89aaecaa110
SSDEEP 49152:E9Yfn2sTQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQT:eYP2s
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

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

pid	Process
1212	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\imncstxa\ImagePath = "C:\\Windows\\SysWOW64\\imncstxa\\cezfylv.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-1-5-21-355097885-2402257403-2971294179-1000\Control Panel\International\Geo\Nation	0cfc8367505b43f71a3e388531f840ad_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
2336	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1236	cezfylv.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1236 set thread context of 2336	1236	cezfylv.exe	93

Launches sc.exe 3 IoCs

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

pid	Process
1492	sc.exe
724	sc.exe
4952	sc.exe

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

System Information Discovery
T1082

Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

persistence privilege_escalation

Netsh Helper DLL

T1546.007

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

System Location Discovery: System Language Discovery 1 TTPs 9 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cezfylv.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	0cfc8367505b43f71a3e388531f840ad_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2160 wrote to memory of 5020	2160	0cfc8367505b43f71a3e388531f840ad_JaffaCakes118.exe	82
PID 2160 wrote to memory of 5020	2160	0cfc8367505b43f71a3e388531f840ad_JaffaCakes118.exe	82
PID 2160 wrote to memory of 5020	2160	0cfc8367505b43f71a3e388531f840ad_JaffaCakes118.exe	82
PID 2160 wrote to memory of 2680	2160	0cfc8367505b43f71a3e388531f840ad_JaffaCakes118.exe	84
PID 2160 wrote to memory of 2680	2160	0cfc8367505b43f71a3e388531f840ad_JaffaCakes118.exe	84
PID 2160 wrote to memory of 2680	2160	0cfc8367505b43f71a3e388531f840ad_JaffaCakes118.exe	84
PID 2160 wrote to memory of 1492	2160	0cfc8367505b43f71a3e388531f840ad_JaffaCakes118.exe	86
PID 2160 wrote to memory of 1492	2160	0cfc8367505b43f71a3e388531f840ad_JaffaCakes118.exe	86
PID 2160 wrote to memory of 1492	2160	0cfc8367505b43f71a3e388531f840ad_JaffaCakes118.exe	86
PID 2160 wrote to memory of 724	2160	0cfc8367505b43f71a3e388531f840ad_JaffaCakes118.exe	88
PID 2160 wrote to memory of 724	2160	0cfc8367505b43f71a3e388531f840ad_JaffaCakes118.exe	88
PID 2160 wrote to memory of 724	2160	0cfc8367505b43f71a3e388531f840ad_JaffaCakes118.exe	88
PID 2160 wrote to memory of 4952	2160	0cfc8367505b43f71a3e388531f840ad_JaffaCakes118.exe	90
PID 2160 wrote to memory of 4952	2160	0cfc8367505b43f71a3e388531f840ad_JaffaCakes118.exe	90
PID 2160 wrote to memory of 4952	2160	0cfc8367505b43f71a3e388531f840ad_JaffaCakes118.exe	90
PID 1236 wrote to memory of 2336	1236	cezfylv.exe	93
PID 1236 wrote to memory of 2336	1236	cezfylv.exe	93
PID 1236 wrote to memory of 2336	1236	cezfylv.exe	93
PID 1236 wrote to memory of 2336	1236	cezfylv.exe	93
PID 1236 wrote to memory of 2336	1236	cezfylv.exe	93
PID 2160 wrote to memory of 1212	2160	0cfc8367505b43f71a3e388531f840ad_JaffaCakes118.exe	94
PID 2160 wrote to memory of 1212	2160	0cfc8367505b43f71a3e388531f840ad_JaffaCakes118.exe	94
PID 2160 wrote to memory of 1212	2160	0cfc8367505b43f71a3e388531f840ad_JaffaCakes118.exe	94

C:\Users\Admin\AppData\Local\Temp\0cfc8367505b43f71a3e388531f840ad_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\0cfc8367505b43f71a3e388531f840ad_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2160
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\imncstxa\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:5020
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\cezfylv.exe" C:\Windows\SysWOW64\imncstxa\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2680
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create imncstxa binPath= "C:\Windows\SysWOW64\imncstxa\cezfylv.exe /d\"C:\Users\Admin\AppData\Local\Temp\0cfc8367505b43f71a3e388531f840ad_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1492
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description imncstxa "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:724
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start imncstxa
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4952
- 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
  - Event Triggered Execution: Netsh Helper DLL
  - System Location Discovery: System Language Discovery
  PID:1212

C:\Windows\SysWOW64\imncstxa\cezfylv.exe
C:\Windows\SysWOW64\imncstxa\cezfylv.exe /d"C:\Users\Admin\AppData\Local\Temp\0cfc8367505b43f71a3e388531f840ad_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1236
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2336

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

T1569

Service Execution

T1569.002

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

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

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

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

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

cezfylv.exe

Path C:\Users\Admin\AppData\Local\Temp\cezfylv.exe
Size 10.7MB
SHA256 82cf3ba7866f6f23ea083b71f22c2b9bef95da5194697a65e1e2b21b365192d9
MD5 1fabba453ed792576a7a6ac45333189b
SHA1 03d37b17a640612dde3a5d4953cb5c4972c82882
SHA512 4e96f49340d99f1d4876099823e7be8de3bfce5bbae72b3d11db404bb158d99fe0fdad6567e731f02758bc91a6a14d4bc88ea7179202b1df505552494f3348ed
SSDEEP 49152:e9Yfn2sTQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQI:4YP2s
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1236-8-0x0000000000400000-0x0000000000456000-memory.dmp

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memory/1236-15-0x0000000000400000-0x0000000000456000-memory.dmp

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memory/1236-10-0x0000000000400000-0x0000000000456000-memory.dmp

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memory/1236-9-0x0000000000400000-0x0000000000456000-memory.dmp

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memory/2160-19-0x0000000000400000-0x0000000000415000-memory.dmp

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memory/2160-3-0x0000000000400000-0x0000000000415000-memory.dmp

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memory/2160-2-0x00000000005E0000-0x00000000005F3000-memory.dmp

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memory/2160-18-0x00000000005E0000-0x00000000005F3000-memory.dmp

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memory/2160-17-0x0000000000400000-0x0000000000456000-memory.dmp

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memory/2160-1-0x0000000000760000-0x0000000000860000-memory.dmp

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memory/2336-11-0x0000000000B40000-0x0000000000B55000-memory.dmp

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memory/2336-16-0x0000000000B40000-0x0000000000B55000-memory.dmp

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memory/2336-20-0x0000000000B40000-0x0000000000B55000-memory.dmp

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memory/2336-21-0x0000000000B40000-0x0000000000B55000-memory.dmp

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memory/2336-22-0x0000000000B40000-0x0000000000B55000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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