tofsee | dc9b51704541b43494bab704763d5f593a560cd758fd8d1aba1817a9a4ebd6b5

Analysis

max time kernel
150s
max time network
154s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
09/03/2024, 19:15

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General

Target

bc9734c2cc8f0ce729606a1094139e5e.exe
Size

11.7MB
MD5

bc9734c2cc8f0ce729606a1094139e5e
SHA1

9ba350559fdc66ad89cfaa88374dddcefd49ea37
SHA256

dc9b51704541b43494bab704763d5f593a560cd758fd8d1aba1817a9a4ebd6b5
SHA512

ed704ce7597efd3cb4e1ebb7acb3dacbc53f4f0819cf800ead36a07c7044d01115994303b467330ccd7c9a07bd40f46279ccb05abc528508bb41a86187885040
SSDEEP

24576:ajCj10HSqGgeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeO:a/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\djbsmztb = "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
2716	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\djbsmztb\ImagePath = "C:\\Windows\\SysWOW64\\djbsmztb\\vzcyktqm.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2412	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2604	vzcyktqm.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2604 set thread context of 2412	2604	vzcyktqm.exe	41

Launches sc.exe 3 IoCs

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

pid	Process
2504	sc.exe
2808	sc.exe
2524	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 2888 wrote to memory of 2680	2888	bc9734c2cc8f0ce729606a1094139e5e.exe	28
PID 2888 wrote to memory of 2680	2888	bc9734c2cc8f0ce729606a1094139e5e.exe	28
PID 2888 wrote to memory of 2680	2888	bc9734c2cc8f0ce729606a1094139e5e.exe	28
PID 2888 wrote to memory of 2680	2888	bc9734c2cc8f0ce729606a1094139e5e.exe	28
PID 2888 wrote to memory of 2944	2888	bc9734c2cc8f0ce729606a1094139e5e.exe	30
PID 2888 wrote to memory of 2944	2888	bc9734c2cc8f0ce729606a1094139e5e.exe	30
PID 2888 wrote to memory of 2944	2888	bc9734c2cc8f0ce729606a1094139e5e.exe	30
PID 2888 wrote to memory of 2944	2888	bc9734c2cc8f0ce729606a1094139e5e.exe	30
PID 2888 wrote to memory of 2504	2888	bc9734c2cc8f0ce729606a1094139e5e.exe	32
PID 2888 wrote to memory of 2504	2888	bc9734c2cc8f0ce729606a1094139e5e.exe	32
PID 2888 wrote to memory of 2504	2888	bc9734c2cc8f0ce729606a1094139e5e.exe	32
PID 2888 wrote to memory of 2504	2888	bc9734c2cc8f0ce729606a1094139e5e.exe	32
PID 2888 wrote to memory of 2808	2888	bc9734c2cc8f0ce729606a1094139e5e.exe	34
PID 2888 wrote to memory of 2808	2888	bc9734c2cc8f0ce729606a1094139e5e.exe	34
PID 2888 wrote to memory of 2808	2888	bc9734c2cc8f0ce729606a1094139e5e.exe	34
PID 2888 wrote to memory of 2808	2888	bc9734c2cc8f0ce729606a1094139e5e.exe	34
PID 2888 wrote to memory of 2524	2888	bc9734c2cc8f0ce729606a1094139e5e.exe	36
PID 2888 wrote to memory of 2524	2888	bc9734c2cc8f0ce729606a1094139e5e.exe	36
PID 2888 wrote to memory of 2524	2888	bc9734c2cc8f0ce729606a1094139e5e.exe	36
PID 2888 wrote to memory of 2524	2888	bc9734c2cc8f0ce729606a1094139e5e.exe	36
PID 2888 wrote to memory of 2716	2888	bc9734c2cc8f0ce729606a1094139e5e.exe	39
PID 2888 wrote to memory of 2716	2888	bc9734c2cc8f0ce729606a1094139e5e.exe	39
PID 2888 wrote to memory of 2716	2888	bc9734c2cc8f0ce729606a1094139e5e.exe	39
PID 2888 wrote to memory of 2716	2888	bc9734c2cc8f0ce729606a1094139e5e.exe	39
PID 2604 wrote to memory of 2412	2604	vzcyktqm.exe	41
PID 2604 wrote to memory of 2412	2604	vzcyktqm.exe	41
PID 2604 wrote to memory of 2412	2604	vzcyktqm.exe	41
PID 2604 wrote to memory of 2412	2604	vzcyktqm.exe	41
PID 2604 wrote to memory of 2412	2604	vzcyktqm.exe	41
PID 2604 wrote to memory of 2412	2604	vzcyktqm.exe	41

C:\Users\Admin\AppData\Local\Temp\bc9734c2cc8f0ce729606a1094139e5e.exe
"C:\Users\Admin\AppData\Local\Temp\bc9734c2cc8f0ce729606a1094139e5e.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2888
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\djbsmztb\
  2⤵
  PID:2680
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vzcyktqm.exe" C:\Windows\SysWOW64\djbsmztb\
  2⤵
  PID:2944
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create djbsmztb binPath= "C:\Windows\SysWOW64\djbsmztb\vzcyktqm.exe /d\"C:\Users\Admin\AppData\Local\Temp\bc9734c2cc8f0ce729606a1094139e5e.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:2504
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description djbsmztb "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:2808
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start djbsmztb
  2⤵
  - Launches sc.exe
  PID:2524
- 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:2716

C:\Windows\SysWOW64\djbsmztb\vzcyktqm.exe
C:\Windows\SysWOW64\djbsmztb\vzcyktqm.exe /d"C:\Users\Admin\AppData\Local\Temp\bc9734c2cc8f0ce729606a1094139e5e.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2604
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Windows security bypass
  - Sets service image path in registry
  - Deletes itself
  PID:2412

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\vzcyktqm.exe

Filesize
9.6MB

MD5
b94bdd3f85f4e0381e3290c4f29c7eef

SHA1
05f876f18dd772ab0475a5eb2febe51bc6a626ff

SHA256
eb5a764a6024759dbd1506d81a824d26c7ee0758cf90e56187bd9ec63db507b1

SHA512
4c970d725b19487e0d3a301bb7fb268c698d0cdccce1e8c19e2d7d3cc8889e0eeb22077bafdbc3898b8e2405a8768fb49ffaa5ef592bffc292b38039e0651195

Download Submit
C:\Windows\SysWOW64\djbsmztb\vzcyktqm.exe

Filesize
4.3MB

MD5
320c527450f03eeae4cf182343e8412d

SHA1
eabe047cf30eed85d2cfbe476199e26c20e73870

SHA256
03b2bfd37a23ad4ff21238d7653689b24f0ccb07e3423d35da73c0ef7f738596

SHA512
1263f986df4779a065a1adc190aeb3e66675bff461fdce91b6dc12f0df5dc0801399be611e45e78c338db6a9fbd40d2bb2266287b0276b4448bf9e6a4c33fe9e

Download Submit
memory/2412-12-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2412-22-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2412-21-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2412-20-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2412-15-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2412-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2604-11-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/2604-10-0x0000000000510000-0x0000000000610000-memory.dmp

Filesize
1024KB

Download
memory/2604-17-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/2888-1-0x0000000000520000-0x0000000000620000-memory.dmp

Filesize
1024KB

Download
memory/2888-9-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/2888-8-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/2888-3-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/2888-2-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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