tofsee | 5dfb6e38638229e915cc61d098ac5604c57e9951cb10427fc9af1cb3048dae46

Analysis

max time kernel
150s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
27/03/2024, 14:35

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General

Target
e1e76de4328d3b1cbaddd63648b68b89.exe
Size 12.4MB
Sample240327-rye9wahd2v
SHA256 5dfb6e38638229e915cc61d098ac5604c57e9951cb10427fc9af1cb3048dae46
MD5 e1e76de4328d3b1cbaddd63648b68b89
SHA1 b45d7bfd9d0d21112ad8fd4a987e1a4aab664db8
SHA512 bc3e711f37e0907a234526811f49660f9589076796324b234cee99f6d0b0520b3696e5e1c6a93ebf24a4a6b86422938d1f18373aa9b31f6cab4f4aaec498d741
SSDEEP 393216:qmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmma:qmmmmmmmmmmmmmmmmmmmmmmmmmmmmmma
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

194.61.3.129
defeatwax.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
2132	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\kjpjkogx\ImagePath = "C:\\Windows\\SysWOW64\\kjpjkogx\\qzzuvgxo.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-1-5-21-557049126-2506969350-2798870634-1000\Control Panel\International\Geo\Nation	e1e76de4328d3b1cbaddd63648b68b89.exe

Deletes itself 1 IoCs

pid	Process
872	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3096	qzzuvgxo.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3096 set thread context of 872	3096	qzzuvgxo.exe	112

Launches sc.exe 3 IoCs

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

pid	Process
2560	sc.exe
4068	sc.exe
4796	sc.exe

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

System Information Discovery
T1082

Program crash 2 IoCs

pid	pid_target	Process	procid_target
5068	5008	WerFault.exe	86
3704	3096	WerFault.exe	101

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 5008 wrote to memory of 4748	5008	e1e76de4328d3b1cbaddd63648b68b89.exe	91
PID 5008 wrote to memory of 4748	5008	e1e76de4328d3b1cbaddd63648b68b89.exe	91
PID 5008 wrote to memory of 4748	5008	e1e76de4328d3b1cbaddd63648b68b89.exe	91
PID 5008 wrote to memory of 440	5008	e1e76de4328d3b1cbaddd63648b68b89.exe	93
PID 5008 wrote to memory of 440	5008	e1e76de4328d3b1cbaddd63648b68b89.exe	93
PID 5008 wrote to memory of 440	5008	e1e76de4328d3b1cbaddd63648b68b89.exe	93
PID 5008 wrote to memory of 2560	5008	e1e76de4328d3b1cbaddd63648b68b89.exe	95
PID 5008 wrote to memory of 2560	5008	e1e76de4328d3b1cbaddd63648b68b89.exe	95
PID 5008 wrote to memory of 2560	5008	e1e76de4328d3b1cbaddd63648b68b89.exe	95
PID 5008 wrote to memory of 4068	5008	e1e76de4328d3b1cbaddd63648b68b89.exe	97
PID 5008 wrote to memory of 4068	5008	e1e76de4328d3b1cbaddd63648b68b89.exe	97
PID 5008 wrote to memory of 4068	5008	e1e76de4328d3b1cbaddd63648b68b89.exe	97
PID 5008 wrote to memory of 4796	5008	e1e76de4328d3b1cbaddd63648b68b89.exe	99
PID 5008 wrote to memory of 4796	5008	e1e76de4328d3b1cbaddd63648b68b89.exe	99
PID 5008 wrote to memory of 4796	5008	e1e76de4328d3b1cbaddd63648b68b89.exe	99
PID 5008 wrote to memory of 2132	5008	e1e76de4328d3b1cbaddd63648b68b89.exe	102
PID 5008 wrote to memory of 2132	5008	e1e76de4328d3b1cbaddd63648b68b89.exe	102
PID 5008 wrote to memory of 2132	5008	e1e76de4328d3b1cbaddd63648b68b89.exe	102
PID 3096 wrote to memory of 872	3096	qzzuvgxo.exe	112
PID 3096 wrote to memory of 872	3096	qzzuvgxo.exe	112
PID 3096 wrote to memory of 872	3096	qzzuvgxo.exe	112
PID 3096 wrote to memory of 872	3096	qzzuvgxo.exe	112
PID 3096 wrote to memory of 872	3096	qzzuvgxo.exe	112

C:\Users\Admin\AppData\Local\Temp\e1e76de4328d3b1cbaddd63648b68b89.exe
"C:\Users\Admin\AppData\Local\Temp\e1e76de4328d3b1cbaddd63648b68b89.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5008
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\kjpjkogx\
  2⤵
  PID:4748
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\qzzuvgxo.exe" C:\Windows\SysWOW64\kjpjkogx\
  2⤵
  PID:440
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create kjpjkogx binPath= "C:\Windows\SysWOW64\kjpjkogx\qzzuvgxo.exe /d\"C:\Users\Admin\AppData\Local\Temp\e1e76de4328d3b1cbaddd63648b68b89.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:2560
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description kjpjkogx "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:4068
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start kjpjkogx
  2⤵
  - Launches sc.exe
  PID:4796
- 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:2132
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5008 -s 1036
  2⤵
  - Program crash
  PID:5068

C:\Windows\SysWOW64\kjpjkogx\qzzuvgxo.exe
C:\Windows\SysWOW64\kjpjkogx\qzzuvgxo.exe /d"C:\Users\Admin\AppData\Local\Temp\e1e76de4328d3b1cbaddd63648b68b89.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3096
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:872
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3096 -s 520
  2⤵
  - Program crash
  PID:3704

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 5008 -ip 5008
1⤵
PID:1176

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 3096 -ip 3096
1⤵
PID:4912

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

qzzuvgxo.exe

Path C:\Users\Admin\AppData\Local\Temp\qzzuvgxo.exe
Size 10.3MB
SHA256 1ca3ed20473c857ffe33857bf7443c3f9f2b15de24c529f9d6ca2ece27a315d4
MD5 bdf548e877fac5c3fddbbc0a1efbf235
SHA1 77090c609c45fec7497cde8dc21913ecb79d2dda
SHA512 a58a47ea1b8d4186da1150fca596ca04367f73d42ebb3d147345608c4ac6d4080c5668ed827c6027abaa5f69387614b088f2652493553c63c19171d29556333a
SSDEEP 196608:ZmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmK:ZmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmK
MD5 SHA1 SHA512 SSDEEP

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qzzuvgxo.exe

Path C:\Windows\SysWOW64\kjpjkogx\qzzuvgxo.exe
Size 7.1MB
SHA256 071f9f5bf27f75f76652f57b8e6c166892ef36abd8cada85afb5ecacc3055874
MD5 3ba0c4b7f5f3d5a4cb875ed9b5320730
SHA1 6566fd29b3fe7d085dede0190e650e8ec5a4cd58
SHA512 8960242630ea3ae4f4c384d4867c2c9620529d4afc28babe61b5fa9f14c18223af50b198c206fcc5a5d44d2e7167168ef83fa064ef6feb2ccc94a6fb374af749
SSDEEP 196608:ZmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmM:ZmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmM
MD5 SHA1 SHA512 SSDEEP

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memory/872-12-0x00000000001C0000-0x00000000001D5000-memory.dmp

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memory/872-19-0x00000000001C0000-0x00000000001D5000-memory.dmp

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memory/872-18-0x00000000001C0000-0x00000000001D5000-memory.dmp

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memory/872-16-0x00000000001C0000-0x00000000001D5000-memory.dmp

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memory/872-15-0x00000000001C0000-0x00000000001D5000-memory.dmp

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memory/3096-11-0x0000000000400000-0x000000000089C000-memory.dmp

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memory/3096-10-0x00000000008C0000-0x00000000009C0000-memory.dmp

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memory/3096-17-0x0000000000400000-0x000000000089C000-memory.dmp

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memory/5008-1-0x0000000000AF0000-0x0000000000BF0000-memory.dmp

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memory/5008-9-0x0000000000920000-0x0000000000933000-memory.dmp

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memory/5008-8-0x0000000000400000-0x000000000089C000-memory.dmp

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memory/5008-4-0x0000000000400000-0x000000000089C000-memory.dmp

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memory/5008-2-0x0000000000920000-0x0000000000933000-memory.dmp

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Analysis

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General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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