tofsee | 281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913

Analysis

max time kernel
147s
max time network
126s
platform
windows7_x64
resource
win7-20231025-en
resource tags

arch:x64arch:x86image:win7-20231025-enlocale:en-usos:windows7-x64system
submitted
14/11/2023, 19:03

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General

Target

281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913.exe
Size

13.1MB
MD5

873c0a981c80da05593897c6aec0e842
SHA1

3fb083e944c36cc3a938e64d9c10ace3065d444a
SHA256

281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913
SHA512

27c119c25dbe7cca2da3043eff931bfc0d9ad5b34cd7489000181cf3d8aa6814b83ef1185f6e7f692e9e87cca17d9b5c5d89ab0402e9264840fa80f5da21800d
SSDEEP

393216:tkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk7:tkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk7

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

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\lbjzcmzk = "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
2556	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\lbjzcmzk\ImagePath = "C:\\Windows\\SysWOW64\\lbjzcmzk\\dfaricjc.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2588	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2552	dfaricjc.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2552 set thread context of 2588	2552	dfaricjc.exe	41

Launches sc.exe 3 IoCs

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

pid	Process
2776	sc.exe
2644	sc.exe
1200	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 1736 wrote to memory of 1740	1736	281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913.exe	28
PID 1736 wrote to memory of 1740	1736	281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913.exe	28
PID 1736 wrote to memory of 1740	1736	281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913.exe	28
PID 1736 wrote to memory of 1740	1736	281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913.exe	28
PID 1736 wrote to memory of 2780	1736	281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913.exe	30
PID 1736 wrote to memory of 2780	1736	281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913.exe	30
PID 1736 wrote to memory of 2780	1736	281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913.exe	30
PID 1736 wrote to memory of 2780	1736	281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913.exe	30
PID 1736 wrote to memory of 2776	1736	281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913.exe	32
PID 1736 wrote to memory of 2776	1736	281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913.exe	32
PID 1736 wrote to memory of 2776	1736	281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913.exe	32
PID 1736 wrote to memory of 2776	1736	281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913.exe	32
PID 1736 wrote to memory of 2644	1736	281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913.exe	34
PID 1736 wrote to memory of 2644	1736	281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913.exe	34
PID 1736 wrote to memory of 2644	1736	281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913.exe	34
PID 1736 wrote to memory of 2644	1736	281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913.exe	34
PID 1736 wrote to memory of 1200	1736	281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913.exe	36
PID 1736 wrote to memory of 1200	1736	281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913.exe	36
PID 1736 wrote to memory of 1200	1736	281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913.exe	36
PID 1736 wrote to memory of 1200	1736	281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913.exe	36
PID 1736 wrote to memory of 2556	1736	281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913.exe	39
PID 1736 wrote to memory of 2556	1736	281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913.exe	39
PID 1736 wrote to memory of 2556	1736	281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913.exe	39
PID 1736 wrote to memory of 2556	1736	281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913.exe	39
PID 2552 wrote to memory of 2588	2552	dfaricjc.exe	41
PID 2552 wrote to memory of 2588	2552	dfaricjc.exe	41
PID 2552 wrote to memory of 2588	2552	dfaricjc.exe	41
PID 2552 wrote to memory of 2588	2552	dfaricjc.exe	41
PID 2552 wrote to memory of 2588	2552	dfaricjc.exe	41
PID 2552 wrote to memory of 2588	2552	dfaricjc.exe	41

C:\Users\Admin\AppData\Local\Temp\281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913.exe
"C:\Users\Admin\AppData\Local\Temp\281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1736
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\lbjzcmzk\
  2⤵
  PID:1740
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\dfaricjc.exe" C:\Windows\SysWOW64\lbjzcmzk\
  2⤵
  PID:2780
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create lbjzcmzk binPath= "C:\Windows\SysWOW64\lbjzcmzk\dfaricjc.exe /d\"C:\Users\Admin\AppData\Local\Temp\281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:2776
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description lbjzcmzk "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:2644
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start lbjzcmzk
  2⤵
  - Launches sc.exe
  PID:1200
- 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:2556

C:\Windows\SysWOW64\lbjzcmzk\dfaricjc.exe
C:\Windows\SysWOW64\lbjzcmzk\dfaricjc.exe /d"C:\Users\Admin\AppData\Local\Temp\281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2552
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Windows security bypass
  - Sets service image path in registry
  - Deletes itself
  PID:2588

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\dfaricjc.exe

Filesize
14.8MB

MD5
c9b3f1a63c7e10928470da3790cf1b03

SHA1
0a73b528929eec0661b24495a9155d6afcbc7ccf

SHA256
bc9d34573222ae8513c7f5c67afcb5f19d98ccba370b243603f972155b8eda71

SHA512
e0fb9e57b974851fcdbd73b8eda33cb8838ee7dfc5d7407b68ee3288a8d3cbb0cf128acb74292bd2f019b4754c2442384fd8e2869b30a9a4161a86067fae2a83

Download Submit
C:\Windows\SysWOW64\lbjzcmzk\dfaricjc.exe

Filesize
14.8MB

MD5
c9b3f1a63c7e10928470da3790cf1b03

SHA1
0a73b528929eec0661b24495a9155d6afcbc7ccf

SHA256
bc9d34573222ae8513c7f5c67afcb5f19d98ccba370b243603f972155b8eda71

SHA512
e0fb9e57b974851fcdbd73b8eda33cb8838ee7dfc5d7407b68ee3288a8d3cbb0cf128acb74292bd2f019b4754c2442384fd8e2869b30a9a4161a86067fae2a83

Download Submit
memory/1736-0-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/1736-2-0x00000000002A0000-0x00000000002A1000-memory.dmp

Filesize
4KB

Download
memory/1736-1-0x0000000000380000-0x0000000000381000-memory.dmp

Filesize
4KB

Download
memory/1736-5-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2552-8-0x00000000003B0000-0x00000000003B1000-memory.dmp

Filesize
4KB

Download
memory/2552-13-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2588-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2588-12-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2588-9-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2588-16-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2588-17-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2588-18-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download

Analysis

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General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads