tofsee | 14a295b3a6bf125740d49d05094b1af522103abbc9f1c93f5eb69cc896612837

Analysis

max time kernel
150s
max time network
159s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
10/01/2024, 23:04

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General

Target
51dcbf03db38b6530aeb99affa05ece1.exe
Size 11.5MB
Sample240110-22esmaagf2
SHA256 14a295b3a6bf125740d49d05094b1af522103abbc9f1c93f5eb69cc896612837
MD5 51dcbf03db38b6530aeb99affa05ece1
SHA1 087b838e02ccf2b3bdbc97633b23394643909a7d
SHA512 089775a71eeb6678f1dc28b588c4fc855024195137d8341ede8c657794b25601c81883567259a611ad97152b1ac74c93b9aad845000654381c22473aae961735
SSDEEP 49152:766666666666666666666666666666666666666666666666666666666666666u:
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

43.231.4.6
lazystax.ru

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee
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
1140	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\mzcqztnz\ImagePath = "C:\\Windows\\SysWOW64\\mzcqztnz\\mntcnjxf.exe"	svchost.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1815711207-1844170477-3539718864-1000\Control Panel\International\Geo\Nation	51dcbf03db38b6530aeb99affa05ece1.exe

Deletes itself 1 IoCs

pid	Process
4972	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4604	mntcnjxf.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4604 set thread context of 4972	4604	mntcnjxf.exe	112

Launches sc.exe 3 IoCs

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

pid	Process
4832	sc.exe
1648	sc.exe
3868	sc.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 2 IoCs

pid	pid_target	Process	procid_target
4128	4420	WerFault.exe	87
4040	4604	WerFault.exe	105

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4420 wrote to memory of 4392	4420	51dcbf03db38b6530aeb99affa05ece1.exe	92
PID 4420 wrote to memory of 4392	4420	51dcbf03db38b6530aeb99affa05ece1.exe	92
PID 4420 wrote to memory of 4392	4420	51dcbf03db38b6530aeb99affa05ece1.exe	92
PID 4420 wrote to memory of 2724	4420	51dcbf03db38b6530aeb99affa05ece1.exe	94
PID 4420 wrote to memory of 2724	4420	51dcbf03db38b6530aeb99affa05ece1.exe	94
PID 4420 wrote to memory of 2724	4420	51dcbf03db38b6530aeb99affa05ece1.exe	94
PID 4420 wrote to memory of 4832	4420	51dcbf03db38b6530aeb99affa05ece1.exe	97
PID 4420 wrote to memory of 4832	4420	51dcbf03db38b6530aeb99affa05ece1.exe	97
PID 4420 wrote to memory of 4832	4420	51dcbf03db38b6530aeb99affa05ece1.exe	97
PID 4420 wrote to memory of 1648	4420	51dcbf03db38b6530aeb99affa05ece1.exe	99
PID 4420 wrote to memory of 1648	4420	51dcbf03db38b6530aeb99affa05ece1.exe	99
PID 4420 wrote to memory of 1648	4420	51dcbf03db38b6530aeb99affa05ece1.exe	99
PID 4420 wrote to memory of 3868	4420	51dcbf03db38b6530aeb99affa05ece1.exe	104
PID 4420 wrote to memory of 3868	4420	51dcbf03db38b6530aeb99affa05ece1.exe	104
PID 4420 wrote to memory of 3868	4420	51dcbf03db38b6530aeb99affa05ece1.exe	104
PID 4420 wrote to memory of 1140	4420	51dcbf03db38b6530aeb99affa05ece1.exe	106
PID 4420 wrote to memory of 1140	4420	51dcbf03db38b6530aeb99affa05ece1.exe	106
PID 4420 wrote to memory of 1140	4420	51dcbf03db38b6530aeb99affa05ece1.exe	106
PID 4604 wrote to memory of 4972	4604	mntcnjxf.exe	112
PID 4604 wrote to memory of 4972	4604	mntcnjxf.exe	112
PID 4604 wrote to memory of 4972	4604	mntcnjxf.exe	112
PID 4604 wrote to memory of 4972	4604	mntcnjxf.exe	112
PID 4604 wrote to memory of 4972	4604	mntcnjxf.exe	112

C:\Users\Admin\AppData\Local\Temp\51dcbf03db38b6530aeb99affa05ece1.exe
"C:\Users\Admin\AppData\Local\Temp\51dcbf03db38b6530aeb99affa05ece1.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4420
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\mzcqztnz\
  2⤵
  PID:4392
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\mntcnjxf.exe" C:\Windows\SysWOW64\mzcqztnz\
  2⤵
  PID:2724
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create mzcqztnz binPath= "C:\Windows\SysWOW64\mzcqztnz\mntcnjxf.exe /d\"C:\Users\Admin\AppData\Local\Temp\51dcbf03db38b6530aeb99affa05ece1.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:4832
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description mzcqztnz "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:1648
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start mzcqztnz
  2⤵
  - Launches sc.exe
  PID:3868
- 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:1140
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4420 -s 1040
  2⤵
  - Program crash
  PID:4128

C:\Windows\SysWOW64\mzcqztnz\mntcnjxf.exe
C:\Windows\SysWOW64\mzcqztnz\mntcnjxf.exe /d"C:\Users\Admin\AppData\Local\Temp\51dcbf03db38b6530aeb99affa05ece1.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4604
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:4972
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4604 -s 516
  2⤵
  - Program crash
  PID:4040

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 4420 -ip 4420
1⤵
PID:3552

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4604 -ip 4604
1⤵
PID:4848

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

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

mntcnjxf.exe

Path C:\Users\Admin\AppData\Local\Temp\mntcnjxf.exe
Size 92KB
SHA256 a85bcc94cff04894b6b9d22a88f997d9a06ff6009e8a8588f7aed03b619e08a0
MD5 dc8950089fd2d4ed74987f6457ff48b5
SHA1 72da81e49180a6aaf136bbbc8125b201dbcc7ee0
SHA512 7bcfe5c5246e479d9d4add46f2ad79332078fee43b6e6b045eb0bec1c2f44c418a2a42364bde97ef915815d794883591507382fbc2fa1face4672a9a3d3e320d
SSDEEP 1536:hQ6QNa8jy87W9rTge5EHw7yzhzT84zHZV5+HXAqkJOVYy3OsW1O2fquan1HJ9f:h4W4cnbE6mOuKVWM2ftan1p9f
MD5 SHA1 SHA512 SSDEEP

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mntcnjxf.exe

Path C:\Windows\SysWOW64\mzcqztnz\mntcnjxf.exe
Size 381KB
SHA256 da8e0f85bf9b91d36b2bf0059cb3abf1b9c2ff4ad2ca5b5dd2f141c0aaf52a18
MD5 cb6a84cc0e53e7dd3df6cc2501d2a667
SHA1 be7ddf495546acde69e62231888894c06aca0081
SHA512 98b55ba772dc826e0334ef01ca5f3d343ccb856a1d247a26fc3a07bacd9850411144ef3278e6c035ff4ead759adbc0c27edba456c43c50085619f0d7982a6e67
SSDEEP 6144:h/ZbQOVVWLfOp9PO57WuxOLljyjwdByzYzYzYzYz:h/VQOHp9G57WLLl+0fA6666
MD5 SHA1 SHA512 SSDEEP

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memory/4420-7-0x0000000000400000-0x0000000000C0A000-memory.dmp

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memory/4420-4-0x0000000000400000-0x0000000000C0A000-memory.dmp

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memory/4420-1-0x0000000000E60000-0x0000000000F60000-memory.dmp

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memory/4420-8-0x0000000000DB0000-0x0000000000DC3000-memory.dmp

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memory/4420-2-0x0000000000DB0000-0x0000000000DC3000-memory.dmp

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memory/4604-10-0x0000000000CB0000-0x0000000000DB0000-memory.dmp

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memory/4604-11-0x0000000000400000-0x0000000000C0A000-memory.dmp

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memory/4604-17-0x0000000000400000-0x0000000000C0A000-memory.dmp

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memory/4972-16-0x00000000001D0000-0x00000000001E5000-memory.dmp

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memory/4972-15-0x00000000001D0000-0x00000000001E5000-memory.dmp

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memory/4972-12-0x00000000001D0000-0x00000000001E5000-memory.dmp

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memory/4972-18-0x00000000001D0000-0x00000000001E5000-memory.dmp

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memory/4972-19-0x00000000001D0000-0x00000000001E5000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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