tofsee | 6144c9369be2e903bdd67a73d031dac6e9edf69d54956ce1de82749ad4c0759f

General

Target

6144c9369be2e903bdd67a73d031dac6e9edf69d54956ce1de82749ad4c0759f.exe
Size

191KB
MD5

57d8986f5db1704c0d6a46f1c6cbd77e
SHA1

8d1761161e37a7c071d19700cb2b3a073d28f6f0
SHA256

6144c9369be2e903bdd67a73d031dac6e9edf69d54956ce1de82749ad4c0759f
SHA512

cbe09dd61dbf004195fef0dbe15c4abe6eaa6d7f6cfdf87b6019f46a585eedd3f97ff9f9da924bd9e673655096e005058cf3a2f6799b31cbce9ab9966ddeb6b6
SSDEEP

3072:jH+lBBpz9/vh9yxqucBeJAD/MsgzPl5LjRZkpyqp29yOyb1:SBpz9/vh9yxWe+0sgzP/LjRZoJH

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

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
948	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\qexoktpg\ImagePath = "C:\\Windows\\SysWOW64\\qexoktpg\\mvbmkzr.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
4484	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1144	mvbmkzr.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\config\systemprofile:.repos	svchost.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1144 set thread context of 4484	1144	mvbmkzr.exe	95

Launches sc.exe 3 IoCs

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

pid	Process
3524	sc.exe
3588	sc.exe
1004	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

Program crash 2 IoCs

pid	pid_target	Process	procid_target
2708	784	WerFault.exe	78
2180	1144	WerFault.exe	89

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	6144c9369be2e903bdd67a73d031dac6e9edf69d54956ce1de82749ad4c0759f.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mvbmkzr.exe
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

Modifies data under HKEY_USERS 2 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\Control Panel\Buses	svchost.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Control Panel\Buses\Config0 = 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	svchost.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 784 wrote to memory of 2268	784	6144c9369be2e903bdd67a73d031dac6e9edf69d54956ce1de82749ad4c0759f.exe	79
PID 784 wrote to memory of 2268	784	6144c9369be2e903bdd67a73d031dac6e9edf69d54956ce1de82749ad4c0759f.exe	79
PID 784 wrote to memory of 2268	784	6144c9369be2e903bdd67a73d031dac6e9edf69d54956ce1de82749ad4c0759f.exe	79
PID 784 wrote to memory of 4856	784	6144c9369be2e903bdd67a73d031dac6e9edf69d54956ce1de82749ad4c0759f.exe	81
PID 784 wrote to memory of 4856	784	6144c9369be2e903bdd67a73d031dac6e9edf69d54956ce1de82749ad4c0759f.exe	81
PID 784 wrote to memory of 4856	784	6144c9369be2e903bdd67a73d031dac6e9edf69d54956ce1de82749ad4c0759f.exe	81
PID 784 wrote to memory of 3524	784	6144c9369be2e903bdd67a73d031dac6e9edf69d54956ce1de82749ad4c0759f.exe	83
PID 784 wrote to memory of 3524	784	6144c9369be2e903bdd67a73d031dac6e9edf69d54956ce1de82749ad4c0759f.exe	83
PID 784 wrote to memory of 3524	784	6144c9369be2e903bdd67a73d031dac6e9edf69d54956ce1de82749ad4c0759f.exe	83
PID 784 wrote to memory of 3588	784	6144c9369be2e903bdd67a73d031dac6e9edf69d54956ce1de82749ad4c0759f.exe	85
PID 784 wrote to memory of 3588	784	6144c9369be2e903bdd67a73d031dac6e9edf69d54956ce1de82749ad4c0759f.exe	85
PID 784 wrote to memory of 3588	784	6144c9369be2e903bdd67a73d031dac6e9edf69d54956ce1de82749ad4c0759f.exe	85
PID 784 wrote to memory of 1004	784	6144c9369be2e903bdd67a73d031dac6e9edf69d54956ce1de82749ad4c0759f.exe	87
PID 784 wrote to memory of 1004	784	6144c9369be2e903bdd67a73d031dac6e9edf69d54956ce1de82749ad4c0759f.exe	87
PID 784 wrote to memory of 1004	784	6144c9369be2e903bdd67a73d031dac6e9edf69d54956ce1de82749ad4c0759f.exe	87
PID 784 wrote to memory of 948	784	6144c9369be2e903bdd67a73d031dac6e9edf69d54956ce1de82749ad4c0759f.exe	90
PID 784 wrote to memory of 948	784	6144c9369be2e903bdd67a73d031dac6e9edf69d54956ce1de82749ad4c0759f.exe	90
PID 784 wrote to memory of 948	784	6144c9369be2e903bdd67a73d031dac6e9edf69d54956ce1de82749ad4c0759f.exe	90
PID 1144 wrote to memory of 4484	1144	mvbmkzr.exe	95
PID 1144 wrote to memory of 4484	1144	mvbmkzr.exe	95
PID 1144 wrote to memory of 4484	1144	mvbmkzr.exe	95
PID 1144 wrote to memory of 4484	1144	mvbmkzr.exe	95
PID 1144 wrote to memory of 4484	1144	mvbmkzr.exe	95

C:\Users\Admin\AppData\Local\Temp\6144c9369be2e903bdd67a73d031dac6e9edf69d54956ce1de82749ad4c0759f.exe
"C:\Users\Admin\AppData\Local\Temp\6144c9369be2e903bdd67a73d031dac6e9edf69d54956ce1de82749ad4c0759f.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:784
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\qexoktpg\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2268
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\mvbmkzr.exe" C:\Windows\SysWOW64\qexoktpg\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4856
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create qexoktpg binPath= "C:\Windows\SysWOW64\qexoktpg\mvbmkzr.exe /d\"C:\Users\Admin\AppData\Local\Temp\6144c9369be2e903bdd67a73d031dac6e9edf69d54956ce1de82749ad4c0759f.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3524
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description qexoktpg "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3588
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start qexoktpg
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1004
- 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:948
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 784 -s 1096
  2⤵
  - Program crash
  PID:2708

C:\Windows\SysWOW64\qexoktpg\mvbmkzr.exe
C:\Windows\SysWOW64\qexoktpg\mvbmkzr.exe /d"C:\Users\Admin\AppData\Local\Temp\6144c9369be2e903bdd67a73d031dac6e9edf69d54956ce1de82749ad4c0759f.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1144
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - Drops file in System32 directory
  - System Location Discovery: System Language Discovery
  - Modifies data under HKEY_USERS
  PID:4484
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1144 -s 536
  2⤵
  - Program crash
  PID:2180

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 784 -ip 784
1⤵
PID:4552

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 1144 -ip 1144
1⤵
PID:3440

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

System Information Discovery

1

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\mvbmkzr.exe

Filesize
14.3MB

MD5
899aa251f465f2469953872278192ef8

SHA1
39c6f5306c93987a91a0daf5dcaf715fc9b1d3f7

SHA256
6c29457a8ec9a02f3ed3479ad376eaabb673e8ca5595ccc8ff7c5cccc0a79c6b

SHA512
b16519e05236daa4b7c2e684762ad215f3836c97af0d09c794cd7f909b2c23d9692a2eb175b5d372449d37040324f9b42150b1cfa4b519a0326ee963b7f31bd4

Download Submit
memory/784-1-0x0000000000520000-0x0000000000620000-memory.dmp

Filesize
1024KB

Download
memory/784-2-0x0000000002280000-0x0000000002293000-memory.dmp

Filesize
76KB

Download
memory/784-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/784-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/784-8-0x0000000002280000-0x0000000002293000-memory.dmp

Filesize
76KB

Download
memory/784-7-0x0000000000400000-0x0000000000437000-memory.dmp

Filesize
220KB

Download
memory/1144-15-0x0000000000400000-0x0000000000437000-memory.dmp

Filesize
220KB

Download
memory/4484-11-0x0000000000FB0000-0x0000000000FC5000-memory.dmp

Filesize
84KB

Download
memory/4484-13-0x0000000000FB0000-0x0000000000FC5000-memory.dmp

Filesize
84KB

Download
memory/4484-14-0x0000000000FB0000-0x0000000000FC5000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads