tofsee | 6a7b41efa4831599f18fc65fef165a9fd49aa3210eb715a6253487d2bc7572dd

Analysis

max time kernel
145s
max time network
130s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
25/03/2024, 03:37

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General

Target
dd2449cc99a8ebb87ee86c1500f97a41.exe
Size 14.4MB
Sample240325-d6f99aaa4t
SHA256 6a7b41efa4831599f18fc65fef165a9fd49aa3210eb715a6253487d2bc7572dd
MD5 dd2449cc99a8ebb87ee86c1500f97a41
SHA1 d380615538d78ce99b7ce40a2ee73cb97d57941e
SHA512 10ffbe4054a0cf2b51442daf023649ee47858a5dca0b116b6b999635feb1b83d4428fdd2bf6a3b36d7fd5ec2005e1a4d7a4263715a344b9d1293b3fcf73cd7af
SSDEEP 24576:FjY+lg48SlJPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPH:gHSl
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

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\vcmawodm = "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
2456	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\vcmawodm\ImagePath = "C:\\Windows\\SysWOW64\\vcmawodm\\citewlfr.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2548	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2600	citewlfr.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2600 set thread context of 2548	2600	citewlfr.exe	41

Launches sc.exe 3 IoCs

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

pid	Process
2640	sc.exe
2560	sc.exe
1640	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 840 wrote to memory of 2524	840	dd2449cc99a8ebb87ee86c1500f97a41.exe	28
PID 840 wrote to memory of 2524	840	dd2449cc99a8ebb87ee86c1500f97a41.exe	28
PID 840 wrote to memory of 2524	840	dd2449cc99a8ebb87ee86c1500f97a41.exe	28
PID 840 wrote to memory of 2524	840	dd2449cc99a8ebb87ee86c1500f97a41.exe	28
PID 840 wrote to memory of 2536	840	dd2449cc99a8ebb87ee86c1500f97a41.exe	30
PID 840 wrote to memory of 2536	840	dd2449cc99a8ebb87ee86c1500f97a41.exe	30
PID 840 wrote to memory of 2536	840	dd2449cc99a8ebb87ee86c1500f97a41.exe	30
PID 840 wrote to memory of 2536	840	dd2449cc99a8ebb87ee86c1500f97a41.exe	30
PID 840 wrote to memory of 2640	840	dd2449cc99a8ebb87ee86c1500f97a41.exe	32
PID 840 wrote to memory of 2640	840	dd2449cc99a8ebb87ee86c1500f97a41.exe	32
PID 840 wrote to memory of 2640	840	dd2449cc99a8ebb87ee86c1500f97a41.exe	32
PID 840 wrote to memory of 2640	840	dd2449cc99a8ebb87ee86c1500f97a41.exe	32
PID 840 wrote to memory of 2560	840	dd2449cc99a8ebb87ee86c1500f97a41.exe	34
PID 840 wrote to memory of 2560	840	dd2449cc99a8ebb87ee86c1500f97a41.exe	34
PID 840 wrote to memory of 2560	840	dd2449cc99a8ebb87ee86c1500f97a41.exe	34
PID 840 wrote to memory of 2560	840	dd2449cc99a8ebb87ee86c1500f97a41.exe	34
PID 840 wrote to memory of 1640	840	dd2449cc99a8ebb87ee86c1500f97a41.exe	36
PID 840 wrote to memory of 1640	840	dd2449cc99a8ebb87ee86c1500f97a41.exe	36
PID 840 wrote to memory of 1640	840	dd2449cc99a8ebb87ee86c1500f97a41.exe	36
PID 840 wrote to memory of 1640	840	dd2449cc99a8ebb87ee86c1500f97a41.exe	36
PID 840 wrote to memory of 2456	840	dd2449cc99a8ebb87ee86c1500f97a41.exe	39
PID 840 wrote to memory of 2456	840	dd2449cc99a8ebb87ee86c1500f97a41.exe	39
PID 840 wrote to memory of 2456	840	dd2449cc99a8ebb87ee86c1500f97a41.exe	39
PID 840 wrote to memory of 2456	840	dd2449cc99a8ebb87ee86c1500f97a41.exe	39
PID 2600 wrote to memory of 2548	2600	citewlfr.exe	41
PID 2600 wrote to memory of 2548	2600	citewlfr.exe	41
PID 2600 wrote to memory of 2548	2600	citewlfr.exe	41
PID 2600 wrote to memory of 2548	2600	citewlfr.exe	41
PID 2600 wrote to memory of 2548	2600	citewlfr.exe	41
PID 2600 wrote to memory of 2548	2600	citewlfr.exe	41

C:\Users\Admin\AppData\Local\Temp\dd2449cc99a8ebb87ee86c1500f97a41.exe
"C:\Users\Admin\AppData\Local\Temp\dd2449cc99a8ebb87ee86c1500f97a41.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:840
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\vcmawodm\
  2⤵
  PID:2524
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\citewlfr.exe" C:\Windows\SysWOW64\vcmawodm\
  2⤵
  PID:2536
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create vcmawodm binPath= "C:\Windows\SysWOW64\vcmawodm\citewlfr.exe /d\"C:\Users\Admin\AppData\Local\Temp\dd2449cc99a8ebb87ee86c1500f97a41.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:2640
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description vcmawodm "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:2560
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start vcmawodm
  2⤵
  - Launches sc.exe
  PID:1640
- 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:2456

C:\Windows\SysWOW64\vcmawodm\citewlfr.exe
C:\Windows\SysWOW64\vcmawodm\citewlfr.exe /d"C:\Users\Admin\AppData\Local\Temp\dd2449cc99a8ebb87ee86c1500f97a41.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2600
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Windows security bypass
  - Sets service image path in registry
  - Deletes itself
  PID:2548

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

citewlfr.exe

Path C:\Users\Admin\AppData\Local\Temp\citewlfr.exe
Size 546KB
SHA256 aa8cb1d5bc6d98c4db6ea9073a68b676c3ded7fdbc69a7a6de1a09a41103a93e
MD5 1e34d7c80d48b3f2d221ec248e8808d4
SHA1 ab2a5ac00e47f951d014a0a10d32cb66108fc775
SHA512 d9214ca64b8287c7f171de11699d54586c9b469ff1dd640830ceccc04658d84e2aa36f9fafe82fde412cadc788592ce05898aac16781a2c87d92928aaa11eeef
SSDEEP 12288:JcWIjY+lGJJbeE48SljD2G480YgYgYgYgYgYgYgYgYgYgYR:AjY+lg48SlJPPPPPPPPPPR
MD5 SHA1 SHA512 SSDEEP

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citewlfr.exe

Path C:\Windows\SysWOW64\vcmawodm\citewlfr.exe
Size 12.4MB
SHA256 865e8d6971eaa44f3de8b1b550aaa4dfd243804b33756f61087d4a3a4d1ebe04
MD5 19cfa13aebe11707192a4b0bf6dd65c8
SHA1 5ecc02d030387e63614733f7d9079377cfaba41d
SHA512 53b0818d34ced3e6bc3dde6c6b32fcc9e50ba0d254ea7e9b8659c845f44c0df457371f88e3d6a7b729025dc8987a3a418dff25bc45de7470a0998f3721055efc
SSDEEP 24576:AjY+lg48SlJPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPX:LHSl
MD5 SHA1 SHA512 SSDEEP

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memory/840-1-0x0000000000D30000-0x0000000000E30000-memory.dmp

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memory/840-2-0x0000000000220000-0x0000000000233000-memory.dmp

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memory/840-3-0x0000000000400000-0x00000000008E9000-memory.dmp

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memory/840-7-0x0000000000400000-0x00000000008E9000-memory.dmp

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memory/840-8-0x0000000000220000-0x0000000000233000-memory.dmp

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memory/2548-11-0x0000000000080000-0x0000000000095000-memory.dmp

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memory/2548-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

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memory/2548-15-0x0000000000080000-0x0000000000095000-memory.dmp

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memory/2548-19-0x0000000000080000-0x0000000000095000-memory.dmp

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memory/2548-20-0x0000000000080000-0x0000000000095000-memory.dmp

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memory/2548-21-0x0000000000080000-0x0000000000095000-memory.dmp

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memory/2548-22-0x0000000000080000-0x0000000000095000-memory.dmp

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memory/2600-10-0x0000000000A00000-0x0000000000B00000-memory.dmp

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memory/2600-13-0x0000000000400000-0x00000000008E9000-memory.dmp

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memory/2600-16-0x0000000000400000-0x00000000008E9000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads