tofsee | 1a492ad6535cd37ef709e803d55e4bf9086eac1ffe5d5b3f93fd54c2e0578733

Analysis

max time kernel
150s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240611-en
resource tags

arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
submitted
25/06/2024, 17:14

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General

Target
0ee3b729ec821e3c2cc92e2604836b13_JaffaCakes118.exe
Size 12.7MB
Sample240625-vschksvglr
SHA256 1a492ad6535cd37ef709e803d55e4bf9086eac1ffe5d5b3f93fd54c2e0578733
MD5 0ee3b729ec821e3c2cc92e2604836b13
SHA1 cbe962cc4ec46f2c6be966ea974b7320ad72c10e
SHA512 7025ad83ba44a2da1e6e951950f38d7239924c11d21d6931efb29be0660596cdb8c6be42cf9614646c6cb27148ae2979fb149550b7d15cbcc07e9e756bc3ea29
SSDEEP 98304:Z999999999999999999999999999999999999999999999999999999999999999:
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

tofsee 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
3788	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\kfkrmmqx\ImagePath = "C:\\Windows\\SysWOW64\\kfkrmmqx\\fkxxazpu.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-1-5-21-2080292272-204036150-2159171770-1000\Control Panel\International\Geo\Nation	0ee3b729ec821e3c2cc92e2604836b13_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
4596	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1868	fkxxazpu.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1868 set thread context of 4596	1868	fkxxazpu.exe	96

Launches sc.exe 3 IoCs

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

pid	Process
5024	sc.exe
2892	sc.exe
2788	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 queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 540 wrote to memory of 2248	540	0ee3b729ec821e3c2cc92e2604836b13_JaffaCakes118.exe	82
PID 540 wrote to memory of 2248	540	0ee3b729ec821e3c2cc92e2604836b13_JaffaCakes118.exe	82
PID 540 wrote to memory of 2248	540	0ee3b729ec821e3c2cc92e2604836b13_JaffaCakes118.exe	82
PID 540 wrote to memory of 1072	540	0ee3b729ec821e3c2cc92e2604836b13_JaffaCakes118.exe	87
PID 540 wrote to memory of 1072	540	0ee3b729ec821e3c2cc92e2604836b13_JaffaCakes118.exe	87
PID 540 wrote to memory of 1072	540	0ee3b729ec821e3c2cc92e2604836b13_JaffaCakes118.exe	87
PID 540 wrote to memory of 2788	540	0ee3b729ec821e3c2cc92e2604836b13_JaffaCakes118.exe	89
PID 540 wrote to memory of 2788	540	0ee3b729ec821e3c2cc92e2604836b13_JaffaCakes118.exe	89
PID 540 wrote to memory of 2788	540	0ee3b729ec821e3c2cc92e2604836b13_JaffaCakes118.exe	89
PID 540 wrote to memory of 5024	540	0ee3b729ec821e3c2cc92e2604836b13_JaffaCakes118.exe	91
PID 540 wrote to memory of 5024	540	0ee3b729ec821e3c2cc92e2604836b13_JaffaCakes118.exe	91
PID 540 wrote to memory of 5024	540	0ee3b729ec821e3c2cc92e2604836b13_JaffaCakes118.exe	91
PID 540 wrote to memory of 2892	540	0ee3b729ec821e3c2cc92e2604836b13_JaffaCakes118.exe	93
PID 540 wrote to memory of 2892	540	0ee3b729ec821e3c2cc92e2604836b13_JaffaCakes118.exe	93
PID 540 wrote to memory of 2892	540	0ee3b729ec821e3c2cc92e2604836b13_JaffaCakes118.exe	93
PID 1868 wrote to memory of 4596	1868	fkxxazpu.exe	96
PID 1868 wrote to memory of 4596	1868	fkxxazpu.exe	96
PID 1868 wrote to memory of 4596	1868	fkxxazpu.exe	96
PID 1868 wrote to memory of 4596	1868	fkxxazpu.exe	96
PID 1868 wrote to memory of 4596	1868	fkxxazpu.exe	96
PID 540 wrote to memory of 3788	540	0ee3b729ec821e3c2cc92e2604836b13_JaffaCakes118.exe	97
PID 540 wrote to memory of 3788	540	0ee3b729ec821e3c2cc92e2604836b13_JaffaCakes118.exe	97
PID 540 wrote to memory of 3788	540	0ee3b729ec821e3c2cc92e2604836b13_JaffaCakes118.exe	97

C:\Users\Admin\AppData\Local\Temp\0ee3b729ec821e3c2cc92e2604836b13_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\0ee3b729ec821e3c2cc92e2604836b13_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:540
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\kfkrmmqx\
  2⤵
  PID:2248
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\fkxxazpu.exe" C:\Windows\SysWOW64\kfkrmmqx\
  2⤵
  PID:1072
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create kfkrmmqx binPath= "C:\Windows\SysWOW64\kfkrmmqx\fkxxazpu.exe /d\"C:\Users\Admin\AppData\Local\Temp\0ee3b729ec821e3c2cc92e2604836b13_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:2788
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description kfkrmmqx "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:5024
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start kfkrmmqx
  2⤵
  - Launches sc.exe
  PID:2892
- 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
  PID:3788

C:\Windows\SysWOW64\kfkrmmqx\fkxxazpu.exe
C:\Windows\SysWOW64\kfkrmmqx\fkxxazpu.exe /d"C:\Users\Admin\AppData\Local\Temp\0ee3b729ec821e3c2cc92e2604836b13_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1868
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:4596

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

fkxxazpu.exe

Path C:\Users\Admin\AppData\Local\Temp\fkxxazpu.exe
Size 13.4MB
SHA256 8e8a8832f93c61a5a848a87c8a6c93d6b8e486dd6678940143bdd8beae10c311
MD5 882b0ae79e2201efdb1b6533b101f682
SHA1 4e6c33f99513b0ead9f6c5dbc16fd866e5e36357
SHA512 c2ab21fa71e760b58e840cb168b953b34ee18fce8497aa8310d67bf2859c21362aca8a6753afc4749a4d0c762e107898b47a9c47a129b7b600edc627338aa21a
SSDEEP 98304:o99999999999999999999999999999999999999999999999999999999999999H:
MD5 SHA1 SHA512 SSDEEP

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memory/540-16-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/540-3-0x0000000000890000-0x0000000000891000-memory.dmp

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memory/540-2-0x0000000000880000-0x0000000000881000-memory.dmp

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memory/540-1-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/540-0-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/1868-7-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/1868-12-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/1868-11-0x000000005F000000-0x000000005F011000-memory.dmp

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memory/4596-9-0x0000000000BC0000-0x0000000000BD5000-memory.dmp

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memory/4596-15-0x0000000000BC0000-0x0000000000BD5000-memory.dmp

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memory/4596-18-0x0000000000BC0000-0x0000000000BD5000-memory.dmp

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memory/4596-19-0x0000000000BC0000-0x0000000000BD5000-memory.dmp

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memory/4596-20-0x0000000000BC0000-0x0000000000BD5000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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