tofsee | befeb13d03669a0f610ba500df017d7b1c2155d86cc7e985feb439a867851fe0

Analysis

max time kernel
144s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
30/08/2024, 23:46

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General

Target
ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe
Size 14.3MB
Sample240830-3smybatdnm
SHA256 ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411
MD5 2d357e20218ecce7a188d34e2163ac1c
SHA1 1a5bf816db5c146b3b685fdb28c3761608fdfef4
SHA512 59d6d72c15003acd59936ad400a1d1d465c1d109e9c7360f14603c709679e1fddabfae87252fbb0829fad05fa668deca594715d4775bb2fa9b04af776a7fb182
SSDEEP 6144:uM0Em6Qk5N3Sccccccccccccccccccccccccccccccccccccccccccccccccccc8:oEma
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation 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) 2 TTPs
persistence execution

Windows Service
T1543.003

Service Execution
T1569.002

Modifies Windows Firewall 2 TTPs 1 IoCs

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
2024	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\dcdikdmc\ImagePath = "C:\\Windows\\SysWOW64\\dcdikdmc\\eqrlgcda.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-1-5-21-1302416131-1437503476-2806442725-1000\Control Panel\International\Geo\Nation	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe

Deletes itself 1 IoCs

pid	Process
2536	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1844	eqrlgcda.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1844 set thread context of 2536	1844	eqrlgcda.exe	101

Launches sc.exe 3 IoCs

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

pid	Process
5052	sc.exe
5032	sc.exe
2032	sc.exe

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

System Information Discovery
T1082

Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

persistence privilege_escalation

Netsh Helper DLL

T1546.007

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

System Location Discovery: System Language Discovery 1 TTPs 9 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	eqrlgcda.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2064 wrote to memory of 3624	2064	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	87
PID 2064 wrote to memory of 3624	2064	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	87
PID 2064 wrote to memory of 3624	2064	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	87
PID 2064 wrote to memory of 232	2064	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	91
PID 2064 wrote to memory of 232	2064	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	91
PID 2064 wrote to memory of 232	2064	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	91
PID 2064 wrote to memory of 2032	2064	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	93
PID 2064 wrote to memory of 2032	2064	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	93
PID 2064 wrote to memory of 2032	2064	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	93
PID 2064 wrote to memory of 5052	2064	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	95
PID 2064 wrote to memory of 5052	2064	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	95
PID 2064 wrote to memory of 5052	2064	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	95
PID 2064 wrote to memory of 5032	2064	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	98
PID 2064 wrote to memory of 5032	2064	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	98
PID 2064 wrote to memory of 5032	2064	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	98
PID 1844 wrote to memory of 2536	1844	eqrlgcda.exe	101
PID 1844 wrote to memory of 2536	1844	eqrlgcda.exe	101
PID 1844 wrote to memory of 2536	1844	eqrlgcda.exe	101
PID 1844 wrote to memory of 2536	1844	eqrlgcda.exe	101
PID 1844 wrote to memory of 2536	1844	eqrlgcda.exe	101
PID 2064 wrote to memory of 2024	2064	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	102
PID 2064 wrote to memory of 2024	2064	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	102
PID 2064 wrote to memory of 2024	2064	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	102

C:\Users\Admin\AppData\Local\Temp\ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe
"C:\Users\Admin\AppData\Local\Temp\ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2064
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\dcdikdmc\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3624
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\eqrlgcda.exe" C:\Windows\SysWOW64\dcdikdmc\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:232
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create dcdikdmc binPath= "C:\Windows\SysWOW64\dcdikdmc\eqrlgcda.exe /d\"C:\Users\Admin\AppData\Local\Temp\ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2032
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description dcdikdmc "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:5052
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start dcdikdmc
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:5032
- 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
  - Event Triggered Execution: Netsh Helper DLL
  - System Location Discovery: System Language Discovery
  PID:2024

C:\Windows\SysWOW64\dcdikdmc\eqrlgcda.exe
C:\Windows\SysWOW64\dcdikdmc\eqrlgcda.exe /d"C:\Users\Admin\AppData\Local\Temp\ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1844
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2536

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

T1569

Service Execution

T1569.002

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

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

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Defense Evasion

Impair Defenses

T1562

Disable or Modify System Firewall

T1562.004

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

eqrlgcda.exe

Path C:\Users\Admin\AppData\Local\Temp\eqrlgcda.exe
Size 11.2MB
SHA256 1f71961315c21f882ca23fb28dc2bca3db6b5e433c8d5808299982143a6dfd97
MD5 59a3c98025b464ac9ac9fd2824f5fba2
SHA1 10bad430ca1f2a19bfcb34aab4bfa24acb749452
SHA512 f5d7f71ff65df0b3c738442e6c36c0db8032047ca983d22414e980f1f0c9f7247a7d243fa38c3a9d6b7381036095b71b4216ac316d2315bf6034cacd803354ed
SSDEEP 6144:rM0Em6Qk5N3Sccccccccccccccccccccccccccccccccccccccccccccccccccc8:bEma
MD5 SHA1 SHA512 SSDEEP

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memory/1844-7-0x0000000000690000-0x0000000000691000-memory.dmp

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memory/1844-12-0x0000000000400000-0x000000000041F000-memory.dmp

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memory/2064-0-0x0000000000B50000-0x0000000000B51000-memory.dmp

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memory/2064-1-0x0000000000B60000-0x0000000000B61000-memory.dmp

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memory/2064-2-0x0000000000400000-0x000000000041F000-memory.dmp

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memory/2064-13-0x0000000000400000-0x000000000041F000-memory.dmp

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memory/2536-8-0x0000000000AC0000-0x0000000000AD5000-memory.dmp

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memory/2536-11-0x0000000000AC0000-0x0000000000AD5000-memory.dmp

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memory/2536-14-0x0000000000AC0000-0x0000000000AD5000-memory.dmp

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memory/2536-15-0x0000000000AC0000-0x0000000000AD5000-memory.dmp

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memory/2536-16-0x0000000000AC0000-0x0000000000AD5000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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