tofsee | 092573f07c86f7c1637cc647a266c59a5e6f1b23c4524832fe36fc406551bfe4

Analysis

max time kernel
148s
max time network
146s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
31-12-2023 13:09

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General

Target

3757421ea9ac7501daf8319fd8dfbad5.exe
Size

14.3MB
MD5

3757421ea9ac7501daf8319fd8dfbad5
SHA1

a20ee5932e9f907109e3aca3eecc8c031978ba71
SHA256

092573f07c86f7c1637cc647a266c59a5e6f1b23c4524832fe36fc406551bfe4
SHA512

18b7cc5b8828ada39a47248b93218ee8918304d94f52246f1ce19cb0cfbe7d31e5a50c2d98e0cb48cc02c41dc977f51935af04ae35a3321507cf6828efae42a5
SSDEEP

24576:okTlFKR1iLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLX:oLi

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\lyeymdrz = "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
2692	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\lyeymdrz\ImagePath = "C:\\Windows\\SysWOW64\\lyeymdrz\\glhzxam.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2608	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2572	glhzxam.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2572 set thread context of 2608	2572	glhzxam.exe	41

Launches sc.exe 3 IoCs

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

pid	Process
2660	sc.exe
2940	sc.exe
2592	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 2640 wrote to memory of 2012	2640	3757421ea9ac7501daf8319fd8dfbad5.exe	28
PID 2640 wrote to memory of 2012	2640	3757421ea9ac7501daf8319fd8dfbad5.exe	28
PID 2640 wrote to memory of 2012	2640	3757421ea9ac7501daf8319fd8dfbad5.exe	28
PID 2640 wrote to memory of 2012	2640	3757421ea9ac7501daf8319fd8dfbad5.exe	28
PID 2640 wrote to memory of 2684	2640	3757421ea9ac7501daf8319fd8dfbad5.exe	30
PID 2640 wrote to memory of 2684	2640	3757421ea9ac7501daf8319fd8dfbad5.exe	30
PID 2640 wrote to memory of 2684	2640	3757421ea9ac7501daf8319fd8dfbad5.exe	30
PID 2640 wrote to memory of 2684	2640	3757421ea9ac7501daf8319fd8dfbad5.exe	30
PID 2640 wrote to memory of 2660	2640	3757421ea9ac7501daf8319fd8dfbad5.exe	32
PID 2640 wrote to memory of 2660	2640	3757421ea9ac7501daf8319fd8dfbad5.exe	32
PID 2640 wrote to memory of 2660	2640	3757421ea9ac7501daf8319fd8dfbad5.exe	32
PID 2640 wrote to memory of 2660	2640	3757421ea9ac7501daf8319fd8dfbad5.exe	32
PID 2640 wrote to memory of 2940	2640	3757421ea9ac7501daf8319fd8dfbad5.exe	34
PID 2640 wrote to memory of 2940	2640	3757421ea9ac7501daf8319fd8dfbad5.exe	34
PID 2640 wrote to memory of 2940	2640	3757421ea9ac7501daf8319fd8dfbad5.exe	34
PID 2640 wrote to memory of 2940	2640	3757421ea9ac7501daf8319fd8dfbad5.exe	34
PID 2640 wrote to memory of 2592	2640	3757421ea9ac7501daf8319fd8dfbad5.exe	37
PID 2640 wrote to memory of 2592	2640	3757421ea9ac7501daf8319fd8dfbad5.exe	37
PID 2640 wrote to memory of 2592	2640	3757421ea9ac7501daf8319fd8dfbad5.exe	37
PID 2640 wrote to memory of 2592	2640	3757421ea9ac7501daf8319fd8dfbad5.exe	37
PID 2640 wrote to memory of 2692	2640	3757421ea9ac7501daf8319fd8dfbad5.exe	38
PID 2640 wrote to memory of 2692	2640	3757421ea9ac7501daf8319fd8dfbad5.exe	38
PID 2640 wrote to memory of 2692	2640	3757421ea9ac7501daf8319fd8dfbad5.exe	38
PID 2640 wrote to memory of 2692	2640	3757421ea9ac7501daf8319fd8dfbad5.exe	38
PID 2572 wrote to memory of 2608	2572	glhzxam.exe	41
PID 2572 wrote to memory of 2608	2572	glhzxam.exe	41
PID 2572 wrote to memory of 2608	2572	glhzxam.exe	41
PID 2572 wrote to memory of 2608	2572	glhzxam.exe	41
PID 2572 wrote to memory of 2608	2572	glhzxam.exe	41
PID 2572 wrote to memory of 2608	2572	glhzxam.exe	41

C:\Users\Admin\AppData\Local\Temp\3757421ea9ac7501daf8319fd8dfbad5.exe
"C:\Users\Admin\AppData\Local\Temp\3757421ea9ac7501daf8319fd8dfbad5.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2640
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\lyeymdrz\
  2⤵
  PID:2012
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\glhzxam.exe" C:\Windows\SysWOW64\lyeymdrz\
  2⤵
  PID:2684
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create lyeymdrz binPath= "C:\Windows\SysWOW64\lyeymdrz\glhzxam.exe /d\"C:\Users\Admin\AppData\Local\Temp\3757421ea9ac7501daf8319fd8dfbad5.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:2660
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description lyeymdrz "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:2940
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start lyeymdrz
  2⤵
  - Launches sc.exe
  PID:2592
- 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:2692

C:\Windows\SysWOW64\lyeymdrz\glhzxam.exe
C:\Windows\SysWOW64\lyeymdrz\glhzxam.exe /d"C:\Users\Admin\AppData\Local\Temp\3757421ea9ac7501daf8319fd8dfbad5.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2572
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Windows security bypass
  - Sets service image path in registry
  - Deletes itself
  PID:2608

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\glhzxam.exe

Filesize
2.1MB

MD5
7f024ef82b9a06b7be6b56f524e55d2e

SHA1
601d63e6d8b9318c79c71f497cca5a363b14b853

SHA256
3e030df0d04a2ada2f64e218ec9971a2e0cd09631be348f58257ab6281145842

SHA512
40e8851e0f3fd7ca4003849f2e5c73cbc636b62c9f3feede82977e0ef10c2fd989d18bcef1b66a7cef1718401fd4975a34268e2eba840ca2ac43ebb51639bb25

Download Submit
C:\Windows\SysWOW64\lyeymdrz\glhzxam.exe

Filesize
3.4MB

MD5
92dd910aa560176fdb032ca21029f4e6

SHA1
39e83522b6078923dc022a68c8983ce889a5e654

SHA256
2f5ce6d94018604600387091ace946cbbfad7c015a537f521dcf92f4d35cd786

SHA512
a1ec51c40c706a89001cbceaf319a0577f8c7b138044a0982188d5ada797956ed918b2b5d7ca2c18b44a4e6b12e5e81d2801ed0ad6f31c786404573aff44a451

Download Submit
memory/2572-19-0x0000000000400000-0x00000000023AC000-memory.dmp

Filesize
31.7MB

Download
memory/2572-11-0x0000000000230000-0x0000000000330000-memory.dmp

Filesize
1024KB

Download
memory/2608-12-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2608-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2608-15-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2608-21-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2608-22-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2608-23-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2640-2-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/2640-6-0x0000000000400000-0x00000000023AC000-memory.dmp

Filesize
31.7MB

Download
memory/2640-7-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/2640-1-0x0000000002560000-0x0000000002660000-memory.dmp

Filesize
1024KB

Download
memory/2640-4-0x0000000000400000-0x00000000023AC000-memory.dmp

Filesize
31.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads