tofsee | b2eb1eeaf6d84c8e877b366a85c7834453c04e63c0c027b0e014c62e42b69f07

Analysis

max time kernel
147s
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
16/04/2024, 05:59

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General

Target
f2d6bac2f4208d668b547848b5b846a6_JaffaCakes118.exe
Size 12.2MB
Sample240416-gp47jacg8v
SHA256 b2eb1eeaf6d84c8e877b366a85c7834453c04e63c0c027b0e014c62e42b69f07
MD5 f2d6bac2f4208d668b547848b5b846a6
SHA1 1dc64444c82eb91d175bd0490eb5147c959a5dca
SHA512 2efb885ca1f37d7789d6545d91ac50102f29179c84fef558e1a8655b50ba8b17eeb6d17019e535b4bed91a9841812c5701f8a6d497a652c2ed00b4506ae9146d
SSDEEP 49152:w7JggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggI:
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

tofsee evasion persistence 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) 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
2724	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\qvkcfgdk\ImagePath = "C:\\Windows\\SysWOW64\\qvkcfgdk\\pnwxgcrn.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	f2d6bac2f4208d668b547848b5b846a6_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
5060	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
5040	pnwxgcrn.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 5040 set thread context of 5060	5040	pnwxgcrn.exe	100

Launches sc.exe 3 IoCs

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

pid	Process
1148	sc.exe
1512	sc.exe
1812	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 2976 wrote to memory of 3740	2976	f2d6bac2f4208d668b547848b5b846a6_JaffaCakes118.exe	85
PID 2976 wrote to memory of 3740	2976	f2d6bac2f4208d668b547848b5b846a6_JaffaCakes118.exe	85
PID 2976 wrote to memory of 3740	2976	f2d6bac2f4208d668b547848b5b846a6_JaffaCakes118.exe	85
PID 2976 wrote to memory of 1652	2976	f2d6bac2f4208d668b547848b5b846a6_JaffaCakes118.exe	88
PID 2976 wrote to memory of 1652	2976	f2d6bac2f4208d668b547848b5b846a6_JaffaCakes118.exe	88
PID 2976 wrote to memory of 1652	2976	f2d6bac2f4208d668b547848b5b846a6_JaffaCakes118.exe	88
PID 2976 wrote to memory of 1148	2976	f2d6bac2f4208d668b547848b5b846a6_JaffaCakes118.exe	90
PID 2976 wrote to memory of 1148	2976	f2d6bac2f4208d668b547848b5b846a6_JaffaCakes118.exe	90
PID 2976 wrote to memory of 1148	2976	f2d6bac2f4208d668b547848b5b846a6_JaffaCakes118.exe	90
PID 2976 wrote to memory of 1512	2976	f2d6bac2f4208d668b547848b5b846a6_JaffaCakes118.exe	93
PID 2976 wrote to memory of 1512	2976	f2d6bac2f4208d668b547848b5b846a6_JaffaCakes118.exe	93
PID 2976 wrote to memory of 1512	2976	f2d6bac2f4208d668b547848b5b846a6_JaffaCakes118.exe	93
PID 2976 wrote to memory of 1812	2976	f2d6bac2f4208d668b547848b5b846a6_JaffaCakes118.exe	95
PID 2976 wrote to memory of 1812	2976	f2d6bac2f4208d668b547848b5b846a6_JaffaCakes118.exe	95
PID 2976 wrote to memory of 1812	2976	f2d6bac2f4208d668b547848b5b846a6_JaffaCakes118.exe	95
PID 2976 wrote to memory of 2724	2976	f2d6bac2f4208d668b547848b5b846a6_JaffaCakes118.exe	98
PID 2976 wrote to memory of 2724	2976	f2d6bac2f4208d668b547848b5b846a6_JaffaCakes118.exe	98
PID 2976 wrote to memory of 2724	2976	f2d6bac2f4208d668b547848b5b846a6_JaffaCakes118.exe	98
PID 5040 wrote to memory of 5060	5040	pnwxgcrn.exe	100
PID 5040 wrote to memory of 5060	5040	pnwxgcrn.exe	100
PID 5040 wrote to memory of 5060	5040	pnwxgcrn.exe	100
PID 5040 wrote to memory of 5060	5040	pnwxgcrn.exe	100
PID 5040 wrote to memory of 5060	5040	pnwxgcrn.exe	100

C:\Users\Admin\AppData\Local\Temp\f2d6bac2f4208d668b547848b5b846a6_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f2d6bac2f4208d668b547848b5b846a6_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2976
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\qvkcfgdk\
  2⤵
  PID:3740
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\pnwxgcrn.exe" C:\Windows\SysWOW64\qvkcfgdk\
  2⤵
  PID:1652
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create qvkcfgdk binPath= "C:\Windows\SysWOW64\qvkcfgdk\pnwxgcrn.exe /d\"C:\Users\Admin\AppData\Local\Temp\f2d6bac2f4208d668b547848b5b846a6_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:1148
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description qvkcfgdk "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:1512
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start qvkcfgdk
  2⤵
  - Launches sc.exe
  PID:1812
- 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:2724

C:\Windows\SysWOW64\qvkcfgdk\pnwxgcrn.exe
C:\Windows\SysWOW64\qvkcfgdk\pnwxgcrn.exe /d"C:\Users\Admin\AppData\Local\Temp\f2d6bac2f4208d668b547848b5b846a6_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:5040
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:5060

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

pnwxgcrn.exe

Path C:\Users\Admin\AppData\Local\Temp\pnwxgcrn.exe
Size 10.5MB
SHA256 6c111cd1a9edf32f1b390e605a8054b676e6e47534b2c61d6b88c3cc294d1711
MD5 0c07f9ba53ed10cc4a8765ef758ac27b
SHA1 5d39fd040c5d56aafd5e40eac2abbd7d6dcb342e
SHA512 94f9981299d3819951f2d13f6411750976597374ab47c7184e7059793106d371c2111e0179ce2e2cc24289f0477c4ea27efa402d8f1cc8281916f8cfdc1792a5
SSDEEP 49152:S7JggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggD:
MD5 SHA1 SHA512 SSDEEP

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memory/2976-1-0x00000000006A0000-0x00000000007A0000-memory.dmp

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memory/2976-2-0x0000000000600000-0x0000000000613000-memory.dmp

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memory/2976-3-0x0000000000400000-0x0000000000454000-memory.dmp

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memory/2976-8-0x0000000000600000-0x0000000000613000-memory.dmp

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memory/2976-6-0x0000000000400000-0x0000000000454000-memory.dmp

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memory/5040-10-0x0000000000710000-0x0000000000810000-memory.dmp

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memory/5040-11-0x0000000000400000-0x0000000000454000-memory.dmp

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memory/5040-15-0x0000000000400000-0x0000000000454000-memory.dmp

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memory/5060-12-0x0000000000DE0000-0x0000000000DF5000-memory.dmp

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memory/5060-17-0x0000000000DE0000-0x0000000000DF5000-memory.dmp

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memory/5060-18-0x0000000000DE0000-0x0000000000DF5000-memory.dmp

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memory/5060-19-0x0000000000DE0000-0x0000000000DF5000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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