tofsee | 7ec2f5fa69e89fa6c3e23ff269f55517ad6ccf833db9c33d13abeae3fe0eaf0f

Analysis

max time kernel
151s
max time network
163s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
30/12/2023, 10:19

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General

Target
15abd71fa9afdedfbc3f64e46c477ded.exe
Size 10.7MB
Sample231230-mcghlagahn
SHA256 7ec2f5fa69e89fa6c3e23ff269f55517ad6ccf833db9c33d13abeae3fe0eaf0f
MD5 15abd71fa9afdedfbc3f64e46c477ded
SHA1 4497a99e9a59dd93c0cf04ea356f491ae39bf709
SHA512 51f6016b01d29ca1d0b3f233de56fcf8fa9d31ed104f1a8be7c0f8fbe6ab15a4d6d0e2ba98bb5f759f180d9e1a8faa1b41ea523aba8b6b37e2beebed74c0f89d
SSDEEP 6144:tvk9RADRUv1CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCP:uRAD
MD5 SHA1 SHA512 SSDEEP

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
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
1028	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\arukxkou\ImagePath = "C:\\Windows\\SysWOW64\\arukxkou\\ztvsmisx.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-1-5-21-996941297-2279405024-2328152752-1000\Control Panel\International\Geo\Nation	15abd71fa9afdedfbc3f64e46c477ded.exe

Deletes itself 1 IoCs

pid	Process
3744	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1916	ztvsmisx.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1916 set thread context of 3744	1916	ztvsmisx.exe	104

Launches sc.exe 3 IoCs

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

pid	Process
3944	sc.exe
3640	sc.exe
4984	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 23 IoCs

description	pid	Process	procid_target
PID 412 wrote to memory of 2520	412	15abd71fa9afdedfbc3f64e46c477ded.exe	91
PID 412 wrote to memory of 2520	412	15abd71fa9afdedfbc3f64e46c477ded.exe	91
PID 412 wrote to memory of 2520	412	15abd71fa9afdedfbc3f64e46c477ded.exe	91
PID 412 wrote to memory of 2224	412	15abd71fa9afdedfbc3f64e46c477ded.exe	93
PID 412 wrote to memory of 2224	412	15abd71fa9afdedfbc3f64e46c477ded.exe	93
PID 412 wrote to memory of 2224	412	15abd71fa9afdedfbc3f64e46c477ded.exe	93
PID 412 wrote to memory of 3944	412	15abd71fa9afdedfbc3f64e46c477ded.exe	95
PID 412 wrote to memory of 3944	412	15abd71fa9afdedfbc3f64e46c477ded.exe	95
PID 412 wrote to memory of 3944	412	15abd71fa9afdedfbc3f64e46c477ded.exe	95
PID 412 wrote to memory of 3640	412	15abd71fa9afdedfbc3f64e46c477ded.exe	98
PID 412 wrote to memory of 3640	412	15abd71fa9afdedfbc3f64e46c477ded.exe	98
PID 412 wrote to memory of 3640	412	15abd71fa9afdedfbc3f64e46c477ded.exe	98
PID 412 wrote to memory of 4984	412	15abd71fa9afdedfbc3f64e46c477ded.exe	99
PID 412 wrote to memory of 4984	412	15abd71fa9afdedfbc3f64e46c477ded.exe	99
PID 412 wrote to memory of 4984	412	15abd71fa9afdedfbc3f64e46c477ded.exe	99
PID 412 wrote to memory of 1028	412	15abd71fa9afdedfbc3f64e46c477ded.exe	101
PID 412 wrote to memory of 1028	412	15abd71fa9afdedfbc3f64e46c477ded.exe	101
PID 412 wrote to memory of 1028	412	15abd71fa9afdedfbc3f64e46c477ded.exe	101
PID 1916 wrote to memory of 3744	1916	ztvsmisx.exe	104
PID 1916 wrote to memory of 3744	1916	ztvsmisx.exe	104
PID 1916 wrote to memory of 3744	1916	ztvsmisx.exe	104
PID 1916 wrote to memory of 3744	1916	ztvsmisx.exe	104
PID 1916 wrote to memory of 3744	1916	ztvsmisx.exe	104

C:\Users\Admin\AppData\Local\Temp\15abd71fa9afdedfbc3f64e46c477ded.exe
"C:\Users\Admin\AppData\Local\Temp\15abd71fa9afdedfbc3f64e46c477ded.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:412
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\arukxkou\
  2⤵
  PID:2520
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ztvsmisx.exe" C:\Windows\SysWOW64\arukxkou\
  2⤵
  PID:2224
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create arukxkou binPath= "C:\Windows\SysWOW64\arukxkou\ztvsmisx.exe /d\"C:\Users\Admin\AppData\Local\Temp\15abd71fa9afdedfbc3f64e46c477ded.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:3944
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description arukxkou "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:3640
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start arukxkou
  2⤵
  - Launches sc.exe
  PID:4984
- 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:1028

C:\Windows\SysWOW64\arukxkou\ztvsmisx.exe
C:\Windows\SysWOW64\arukxkou\ztvsmisx.exe /d"C:\Users\Admin\AppData\Local\Temp\15abd71fa9afdedfbc3f64e46c477ded.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1916
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:3744

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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ztvsmisx.exe

Path C:\Users\Admin\AppData\Local\Temp\ztvsmisx.exe
Size 9.0MB
SHA256 0747be86e597598f43e03276d693051c32d5a88cc897428b1849e0e271e01433
MD5 230e19c4c49c6d491cfda7719501c9c6
SHA1 d898402c6022dd1a2da40003108717ec4a30ea9e
SHA512 69d75dcea6ceeb9386365e69973c87d32f726bdd4dcfcae68c819009bfb08fc2f578bbf188c7d51f71302cc72326461995867e6c1a72dd1b073c914649b56b21
SSDEEP 6144:xvk9RADRUv1CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCa:aRADh
MD5 SHA1 SHA512 SSDEEP

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ztvsmisx.exe

Path C:\Windows\SysWOW64\arukxkou\ztvsmisx.exe
Size 2.4MB
SHA256 2ad3d9fc0e49ea1f6081058a4d5add9a6051f5a2766fe9d2bfafa5d68d52249e
MD5 b5feb37e9543093e66bf35e4fb826a8e
SHA1 b4623c858e5cb991fb2ed2240a426da4ac536864
SHA512 0b68086c74960716c5cf8b7ebb0c31b470ad2dc29c199f4977654df8aaa5547cbd04a8f333d4ee8934a1cbf67d694147df0af4aa490484f8f2a1ca3b2527e45f
SSDEEP 6144:xvk9RADRUv1CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC5:aRADk
MD5 SHA1 SHA512 SSDEEP

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memory/412-0-0x0000000000580000-0x0000000000581000-memory.dmp

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memory/412-2-0x0000000000B60000-0x0000000000B61000-memory.dmp

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memory/412-1-0x0000000000400000-0x000000000041F000-memory.dmp

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memory/412-5-0x0000000000400000-0x000000000041F000-memory.dmp

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memory/1916-7-0x0000000000400000-0x000000000041F000-memory.dmp

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memory/1916-9-0x0000000000400000-0x000000000041F000-memory.dmp

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memory/3744-8-0x0000000000890000-0x00000000008A5000-memory.dmp

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memory/3744-12-0x0000000000890000-0x00000000008A5000-memory.dmp

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memory/3744-13-0x0000000000890000-0x00000000008A5000-memory.dmp

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memory/3744-14-0x0000000000890000-0x00000000008A5000-memory.dmp

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memory/3744-15-0x0000000000890000-0x00000000008A5000-memory.dmp

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Analysis

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General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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