tofsee | a492284b3b05e75509bd1b8b6e7f73b5bf7f78263d5725082a8c76bb782b3c63

Analysis

max time kernel
143s
max time network
128s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
24-02-2024 11:53

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General

Target

a1cdfab5a4af43636fe8141ba9bb2215.exe
Size

14.8MB
MD5

a1cdfab5a4af43636fe8141ba9bb2215
SHA1

fe8e0d854dee3d741167f4c302b5f05c71e23189
SHA256

a492284b3b05e75509bd1b8b6e7f73b5bf7f78263d5725082a8c76bb782b3c63
SHA512

9dca7bbfbcc6178eecc0221afae418b5012d27b4023e754d0db54811d57074b21583f400408fe06790869585eee163ece122dfd064050287ce7d3561c151e37f
SSDEEP

12288:F1vfanyphPu2xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFz:zvfEyph

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\kjgrcupf = "0"	svchost.exe

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
2748	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\kjgrcupf\ImagePath = "C:\\Windows\\SysWOW64\\kjgrcupf\\wnvtdyft.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2468	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2900	wnvtdyft.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2900 set thread context of 2468	2900	wnvtdyft.exe	41

Launches sc.exe 3 IoCs

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

pid	Process
2624	sc.exe
2400	sc.exe
2676	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 2092 wrote to memory of 2872	2092	a1cdfab5a4af43636fe8141ba9bb2215.exe	28
PID 2092 wrote to memory of 2872	2092	a1cdfab5a4af43636fe8141ba9bb2215.exe	28
PID 2092 wrote to memory of 2872	2092	a1cdfab5a4af43636fe8141ba9bb2215.exe	28
PID 2092 wrote to memory of 2872	2092	a1cdfab5a4af43636fe8141ba9bb2215.exe	28
PID 2092 wrote to memory of 2504	2092	a1cdfab5a4af43636fe8141ba9bb2215.exe	30
PID 2092 wrote to memory of 2504	2092	a1cdfab5a4af43636fe8141ba9bb2215.exe	30
PID 2092 wrote to memory of 2504	2092	a1cdfab5a4af43636fe8141ba9bb2215.exe	30
PID 2092 wrote to memory of 2504	2092	a1cdfab5a4af43636fe8141ba9bb2215.exe	30
PID 2092 wrote to memory of 2624	2092	a1cdfab5a4af43636fe8141ba9bb2215.exe	32
PID 2092 wrote to memory of 2624	2092	a1cdfab5a4af43636fe8141ba9bb2215.exe	32
PID 2092 wrote to memory of 2624	2092	a1cdfab5a4af43636fe8141ba9bb2215.exe	32
PID 2092 wrote to memory of 2624	2092	a1cdfab5a4af43636fe8141ba9bb2215.exe	32
PID 2092 wrote to memory of 2400	2092	a1cdfab5a4af43636fe8141ba9bb2215.exe	34
PID 2092 wrote to memory of 2400	2092	a1cdfab5a4af43636fe8141ba9bb2215.exe	34
PID 2092 wrote to memory of 2400	2092	a1cdfab5a4af43636fe8141ba9bb2215.exe	34
PID 2092 wrote to memory of 2400	2092	a1cdfab5a4af43636fe8141ba9bb2215.exe	34
PID 2092 wrote to memory of 2676	2092	a1cdfab5a4af43636fe8141ba9bb2215.exe	36
PID 2092 wrote to memory of 2676	2092	a1cdfab5a4af43636fe8141ba9bb2215.exe	36
PID 2092 wrote to memory of 2676	2092	a1cdfab5a4af43636fe8141ba9bb2215.exe	36
PID 2092 wrote to memory of 2676	2092	a1cdfab5a4af43636fe8141ba9bb2215.exe	36
PID 2092 wrote to memory of 2748	2092	a1cdfab5a4af43636fe8141ba9bb2215.exe	38
PID 2092 wrote to memory of 2748	2092	a1cdfab5a4af43636fe8141ba9bb2215.exe	38
PID 2092 wrote to memory of 2748	2092	a1cdfab5a4af43636fe8141ba9bb2215.exe	38
PID 2092 wrote to memory of 2748	2092	a1cdfab5a4af43636fe8141ba9bb2215.exe	38
PID 2900 wrote to memory of 2468	2900	wnvtdyft.exe	41
PID 2900 wrote to memory of 2468	2900	wnvtdyft.exe	41
PID 2900 wrote to memory of 2468	2900	wnvtdyft.exe	41
PID 2900 wrote to memory of 2468	2900	wnvtdyft.exe	41
PID 2900 wrote to memory of 2468	2900	wnvtdyft.exe	41
PID 2900 wrote to memory of 2468	2900	wnvtdyft.exe	41

C:\Users\Admin\AppData\Local\Temp\a1cdfab5a4af43636fe8141ba9bb2215.exe
"C:\Users\Admin\AppData\Local\Temp\a1cdfab5a4af43636fe8141ba9bb2215.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2092
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\kjgrcupf\
  2⤵
  PID:2872
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\wnvtdyft.exe" C:\Windows\SysWOW64\kjgrcupf\
  2⤵
  PID:2504
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create kjgrcupf binPath= "C:\Windows\SysWOW64\kjgrcupf\wnvtdyft.exe /d\"C:\Users\Admin\AppData\Local\Temp\a1cdfab5a4af43636fe8141ba9bb2215.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:2624
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description kjgrcupf "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:2400
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start kjgrcupf
  2⤵
  - Launches sc.exe
  PID:2676
- 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:2748

C:\Windows\SysWOW64\kjgrcupf\wnvtdyft.exe
C:\Windows\SysWOW64\kjgrcupf\wnvtdyft.exe /d"C:\Users\Admin\AppData\Local\Temp\a1cdfab5a4af43636fe8141ba9bb2215.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2900
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Windows security bypass
  - Sets service image path in registry
  - Deletes itself
  PID:2468

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

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\wnvtdyft.exe

Filesize
817KB

MD5
8c67f85ea24775909f9875d51a0c2e16

SHA1
578b67c8c28f7bfd8ecd92155ad0838f412db246

SHA256
73198dba75a69fc1ab39550e7b307cf827e901aa5275ec72f8046739ddba6fc8

SHA512
e4a888b802eb017f9f74439dfab4d03d6ad74b0e29ac19368d6ece9c5170bc8a5cf5d91439f0f56fae88885b98b8a0a824538ae1ea112d983864cba0cd6e89ee

Download Submit
C:\Windows\SysWOW64\kjgrcupf\wnvtdyft.exe

Filesize
5.3MB

MD5
7c1b8a1c1f6bcdbc54f786de9866b9d5

SHA1
ae84dde44a95d68bfd5ffebfc435bc6d924a2963

SHA256
3026db9afa2074a5a03ecfe2b8caadc97401c82fe4c1c2dc34ad875bc6ca13d2

SHA512
9ce15015e8e5b752bb156ccaa243b8dcd06ffcdddbdbb533b0fe5088e614250db610da89da08fff2a4578b7cfda7f2531baaef3169c7e6c8007372f8b6a1c64a

Download Submit
memory/2092-1-0x0000000003450000-0x0000000003550000-memory.dmp

Filesize
1024KB

Download
memory/2092-2-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/2092-4-0x0000000000400000-0x0000000003379000-memory.dmp

Filesize
47.5MB

Download
memory/2092-6-0x0000000000400000-0x0000000003379000-memory.dmp

Filesize
47.5MB

Download
memory/2092-8-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/2468-11-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2468-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2468-14-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2468-18-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2468-20-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2468-21-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2468-22-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2900-10-0x00000000002F0000-0x00000000003F0000-memory.dmp

Filesize
1024KB

Download
memory/2900-19-0x0000000000400000-0x0000000003379000-memory.dmp

Filesize
47.5MB

Download
memory/2900-17-0x0000000000400000-0x0000000003379000-memory.dmp

Filesize
47.5MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads