tofsee | c0249a27be3f1b3031ddd40657f5c22b45977388454577489d4917e18cfa4353

Analysis

max time kernel
149s
max time network
154s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
10-01-2024 19:10

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General

Target

382332c0cbbed8ca202b2d2fd83957b8.exe
Size

10.5MB
MD5

382332c0cbbed8ca202b2d2fd83957b8
SHA1

179b0a61c9dd9b1d8827b623bf2767a9c43e63ea
SHA256

c0249a27be3f1b3031ddd40657f5c22b45977388454577489d4917e18cfa4353
SHA512

251def2f2eab0b8b30ad1be114d58a430fdba4e45177cae10373589c124f29797efd0ff82026b8a6ebf185fae7b119e8217e1f225a5eab75b667281c94ff1c4b
SSDEEP

24576:+jCj10HSqGgeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeO:+/D

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\qivktbuo = "0"	svchost.exe

Creates new service(s) 1 TTPs
persistence

Windows Service
T1543.003

Modifies Windows Firewall 1 TTPs 1 IoCs

evasion

Windows Service

T1543.003

pid	Process
2004	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\qivktbuo\ImagePath = "C:\\Windows\\SysWOW64\\qivktbuo\\errpopcc.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2640	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2600	errpopcc.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2600 set thread context of 2640	2600	errpopcc.exe	41

Launches sc.exe 3 IoCs

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

pid	Process
2780	sc.exe
2584	sc.exe
2856	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 2068 wrote to memory of 2120	2068	382332c0cbbed8ca202b2d2fd83957b8.exe	28
PID 2068 wrote to memory of 2120	2068	382332c0cbbed8ca202b2d2fd83957b8.exe	28
PID 2068 wrote to memory of 2120	2068	382332c0cbbed8ca202b2d2fd83957b8.exe	28
PID 2068 wrote to memory of 2120	2068	382332c0cbbed8ca202b2d2fd83957b8.exe	28
PID 2068 wrote to memory of 2376	2068	382332c0cbbed8ca202b2d2fd83957b8.exe	30
PID 2068 wrote to memory of 2376	2068	382332c0cbbed8ca202b2d2fd83957b8.exe	30
PID 2068 wrote to memory of 2376	2068	382332c0cbbed8ca202b2d2fd83957b8.exe	30
PID 2068 wrote to memory of 2376	2068	382332c0cbbed8ca202b2d2fd83957b8.exe	30
PID 2068 wrote to memory of 2780	2068	382332c0cbbed8ca202b2d2fd83957b8.exe	32
PID 2068 wrote to memory of 2780	2068	382332c0cbbed8ca202b2d2fd83957b8.exe	32
PID 2068 wrote to memory of 2780	2068	382332c0cbbed8ca202b2d2fd83957b8.exe	32
PID 2068 wrote to memory of 2780	2068	382332c0cbbed8ca202b2d2fd83957b8.exe	32
PID 2068 wrote to memory of 2584	2068	382332c0cbbed8ca202b2d2fd83957b8.exe	34
PID 2068 wrote to memory of 2584	2068	382332c0cbbed8ca202b2d2fd83957b8.exe	34
PID 2068 wrote to memory of 2584	2068	382332c0cbbed8ca202b2d2fd83957b8.exe	34
PID 2068 wrote to memory of 2584	2068	382332c0cbbed8ca202b2d2fd83957b8.exe	34
PID 2068 wrote to memory of 2856	2068	382332c0cbbed8ca202b2d2fd83957b8.exe	36
PID 2068 wrote to memory of 2856	2068	382332c0cbbed8ca202b2d2fd83957b8.exe	36
PID 2068 wrote to memory of 2856	2068	382332c0cbbed8ca202b2d2fd83957b8.exe	36
PID 2068 wrote to memory of 2856	2068	382332c0cbbed8ca202b2d2fd83957b8.exe	36
PID 2068 wrote to memory of 2004	2068	382332c0cbbed8ca202b2d2fd83957b8.exe	40
PID 2068 wrote to memory of 2004	2068	382332c0cbbed8ca202b2d2fd83957b8.exe	40
PID 2068 wrote to memory of 2004	2068	382332c0cbbed8ca202b2d2fd83957b8.exe	40
PID 2068 wrote to memory of 2004	2068	382332c0cbbed8ca202b2d2fd83957b8.exe	40
PID 2600 wrote to memory of 2640	2600	errpopcc.exe	41
PID 2600 wrote to memory of 2640	2600	errpopcc.exe	41
PID 2600 wrote to memory of 2640	2600	errpopcc.exe	41
PID 2600 wrote to memory of 2640	2600	errpopcc.exe	41
PID 2600 wrote to memory of 2640	2600	errpopcc.exe	41
PID 2600 wrote to memory of 2640	2600	errpopcc.exe	41

C:\Users\Admin\AppData\Local\Temp\382332c0cbbed8ca202b2d2fd83957b8.exe
"C:\Users\Admin\AppData\Local\Temp\382332c0cbbed8ca202b2d2fd83957b8.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2068
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\qivktbuo\
  2⤵
  PID:2120
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\errpopcc.exe" C:\Windows\SysWOW64\qivktbuo\
  2⤵
  PID:2376
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create qivktbuo binPath= "C:\Windows\SysWOW64\qivktbuo\errpopcc.exe /d\"C:\Users\Admin\AppData\Local\Temp\382332c0cbbed8ca202b2d2fd83957b8.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:2780
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description qivktbuo "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:2584
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start qivktbuo
  2⤵
  - Launches sc.exe
  PID:2856
- 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:2004

C:\Windows\SysWOW64\qivktbuo\errpopcc.exe
C:\Windows\SysWOW64\qivktbuo\errpopcc.exe /d"C:\Users\Admin\AppData\Local\Temp\382332c0cbbed8ca202b2d2fd83957b8.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2600
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Windows security bypass
  - Sets service image path in registry
  - Deletes itself
  PID:2640

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 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

C:\Users\Admin\AppData\Local\Temp\errpopcc.exe

Filesize
101KB

MD5
819a6b22f16232e01ad21b768545f801

SHA1
3330dc39f7704dbb7ab7aa9f97170b0838932875

SHA256
505a06fa00f5bd10298cea8b5bd86e69e54920173c9a93c986b0ce4eea494732

SHA512
bc51803e542eda14026bba77dc6ceb92dbe2ba1abde2d454f52899cea8da661a74fdd8aa017b2f20eb87a929cd89a1e55885cc121b752d37a159ee61d77f70dd

Download Submit
C:\Windows\SysWOW64\qivktbuo\errpopcc.exe

Filesize
2.6MB

MD5
330aa7a1108aa6bea5912dc224d8c61a

SHA1
8ff827089152b3b6caba782dd17158d85e1d5952

SHA256
446b18e59446fb5341b52f1647bd07ae002f348ae7d1c7caf83b0b6b845dac8c

SHA512
aa2de47f64e230f4a68ad3c587e81fc11bec97327e13a80938f48fc36267d804a74433fa3a6c3c709f61bc8bd65f5283007b7ba5c348818f2193ee6d90b0ff01

Download Submit
memory/2068-1-0x0000000000550000-0x0000000000650000-memory.dmp

Filesize
1024KB

Download
memory/2068-4-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/2068-3-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/2068-8-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/2600-10-0x0000000000500000-0x0000000000600000-memory.dmp

Filesize
1024KB

Download
memory/2600-12-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/2600-15-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/2640-14-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2640-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2640-19-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2640-20-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2640-9-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2640-21-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads