tofsee | 6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d

General

Target

6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe
Size

13.9MB
MD5

38497df5caa858a3e65f3946bb0e28bf
SHA1

2446e498831b099bc15c37c295387e1c049fc702
SHA256

6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d
SHA512

a172f7b7b005a72069cab497a0b3dfb79badf1b899e990c959eb0b830db4a91250c137e8e5fdf74920ca59a2ede93de39a7f85b774fe7342c1f228ab4b15bf86
SSDEEP

12288:KzpKS0FRvqPKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKn:oMS

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

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

Processes:

netsh.exe

pid	Process
4716	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\ptnmtcfj\ImagePath = "C:\\Windows\\SysWOW64\\ptnmtcfj\\bnoidzax.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

Processes:

6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2170637797-568393320-3232933035-1000\Control Panel\International\Geo\Nation	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid	Process
1332	svchost.exe

Executes dropped EXE 1 IoCs

Processes:

bnoidzax.exe

pid	Process
4428	bnoidzax.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

bnoidzax.exe

description	pid	Process	procid_target
PID 4428 set thread context of 1332	4428	bnoidzax.exe	106

Launches sc.exe 3 IoCs

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

Processes:

sc.exesc.exesc.exe

pid	Process
1084	sc.exe
1672	sc.exe
1236	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

Processes:

netsh.exe

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

Processes:

cmd.execmd.exesc.exesc.exebnoidzax.exenetsh.exe6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exesc.exesvchost.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	bnoidzax.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exebnoidzax.exe

description	pid	Process	procid_target
PID 4888 wrote to memory of 712	4888	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	93
PID 4888 wrote to memory of 712	4888	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	93
PID 4888 wrote to memory of 712	4888	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	93
PID 4888 wrote to memory of 4116	4888	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	95
PID 4888 wrote to memory of 4116	4888	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	95
PID 4888 wrote to memory of 4116	4888	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	95
PID 4888 wrote to memory of 1084	4888	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	97
PID 4888 wrote to memory of 1084	4888	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	97
PID 4888 wrote to memory of 1084	4888	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	97
PID 4888 wrote to memory of 1672	4888	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	99
PID 4888 wrote to memory of 1672	4888	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	99
PID 4888 wrote to memory of 1672	4888	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	99
PID 4888 wrote to memory of 1236	4888	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	101
PID 4888 wrote to memory of 1236	4888	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	101
PID 4888 wrote to memory of 1236	4888	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	101
PID 4428 wrote to memory of 1332	4428	bnoidzax.exe	106
PID 4428 wrote to memory of 1332	4428	bnoidzax.exe	106
PID 4428 wrote to memory of 1332	4428	bnoidzax.exe	106
PID 4428 wrote to memory of 1332	4428	bnoidzax.exe	106
PID 4428 wrote to memory of 1332	4428	bnoidzax.exe	106
PID 4888 wrote to memory of 4716	4888	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	107
PID 4888 wrote to memory of 4716	4888	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	107
PID 4888 wrote to memory of 4716	4888	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	107

C:\Users\Admin\AppData\Local\Temp\6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe
"C:\Users\Admin\AppData\Local\Temp\6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4888
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ptnmtcfj\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:712
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\bnoidzax.exe" C:\Windows\SysWOW64\ptnmtcfj\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4116
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create ptnmtcfj binPath= "C:\Windows\SysWOW64\ptnmtcfj\bnoidzax.exe /d\"C:\Users\Admin\AppData\Local\Temp\6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1084
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description ptnmtcfj "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1672
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start ptnmtcfj
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1236
- 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:4716

C:\Windows\SysWOW64\ptnmtcfj\bnoidzax.exe
C:\Windows\SysWOW64\ptnmtcfj\bnoidzax.exe /d"C:\Users\Admin\AppData\Local\Temp\6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4428
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:1332

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=4360,i,1602949858158667699,12464335823361976127,262144 --variations-seed-version --mojo-platform-channel-handle=1296 /prefetch:8
1⤵
PID:5088

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

1

T1569

Service Execution

1

T1569.002

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Defense Evasion

Impair Defenses

1

T1562

Disable or Modify System Firewall

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\bnoidzax.exe

Filesize
10.2MB

MD5
909a1516b69cb2b26a58dccaebc62bc1

SHA1
0510730a317ef4a24391dedb0e9a7a1b31babbdf

SHA256
ac94247aa4b4544bf35609505dbe31cfda71d6cd429c472591ea1d66cbb49bb3

SHA512
8a218f2b9b12ffbe705f9d3e061b669ba23742d79e7a4ce8dc1a03f18d02c7ded6fb347d80cf5c625a938b9b98bcb73ecdd546db8d17d9e29de1a45501547592

Download Submit
memory/1332-8-0x0000000000660000-0x0000000000675000-memory.dmp

Filesize
84KB

Download
memory/1332-11-0x0000000000660000-0x0000000000675000-memory.dmp

Filesize
84KB

Download
memory/1332-14-0x0000000000660000-0x0000000000675000-memory.dmp

Filesize
84KB

Download
memory/1332-15-0x0000000000660000-0x0000000000675000-memory.dmp

Filesize
84KB

Download
memory/1332-16-0x0000000000660000-0x0000000000675000-memory.dmp

Filesize
84KB

Download
memory/4428-6-0x0000000000580000-0x0000000000581000-memory.dmp

Filesize
4KB

Download
memory/4428-12-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/4888-0-0x00000000005B0000-0x00000000005B1000-memory.dmp

Filesize
4KB

Download
memory/4888-1-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/4888-2-0x00000000008B0000-0x00000000008B1000-memory.dmp

Filesize
4KB

Download
memory/4888-13-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads