tofsee | 91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147

Analysis

max time kernel
119s
max time network
83s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
06-12-2024 23:56

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General

Target

91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147.exe
Size

185KB
MD5

702a92ee66567914adb65b7148249d1f
SHA1

8fefbb1a949e11480385b0282a2c1c668ce9d353
SHA256

91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147
SHA512

2959749751c1111f088cdb223a680cb82d5375dbfa4051da75f8d844cbd6a0623c15b17db1c63c4371e952e938538a2b25cfac130b92d4360c69f77fd4016507
SSDEEP

3072:NeYyWAjeKlIYtJCLg2BWGzH6sugkr1fu73Gh5yv8Vmh:EYyWR10Yp0Kkxfs3D8sh

Score

10^/10

tofsee discovery persistence trojan

Malware Config

Extracted

Family

tofsee

64.20.54.234

rgtryhbgddtyh.biz

wertdghbyrukl.ch

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee
Tofsee family
tofsee

Deletes itself 1 IoCs

pid	Process
2872	cmd.exe

Executes dropped EXE 2 IoCs

pid	Process
2060	fmcn.exe
2116	fmcn.exe

Loads dropped DLL 2 IoCs

pid	Process
1988	91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147.exe
2060	fmcn.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3533259084-2542256011-65585152-1000\Software\Microsoft\Windows\CurrentVersion\Run\MSConfig = "\"C:\\Users\\Admin\\fmcn.exe\" /r"	91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 768 set thread context of 1988	768	91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147.exe	30
PID 2060 set thread context of 2116	2060	fmcn.exe	32
PID 2116 set thread context of 3028	2116	fmcn.exe	35

System Location Discovery: System Language Discovery 1 TTPs 6 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	fmcn.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	fmcn.exe

Suspicious use of WriteProcessMemory 34 IoCs

description	pid	Process	procid_target
PID 768 wrote to memory of 1988	768	91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147.exe	30
PID 768 wrote to memory of 1988	768	91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147.exe	30
PID 768 wrote to memory of 1988	768	91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147.exe	30
PID 768 wrote to memory of 1988	768	91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147.exe	30
PID 768 wrote to memory of 1988	768	91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147.exe	30
PID 768 wrote to memory of 1988	768	91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147.exe	30
PID 768 wrote to memory of 1988	768	91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147.exe	30
PID 768 wrote to memory of 1988	768	91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147.exe	30
PID 768 wrote to memory of 1988	768	91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147.exe	30
PID 768 wrote to memory of 1988	768	91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147.exe	30
PID 1988 wrote to memory of 2060	1988	91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147.exe	31
PID 1988 wrote to memory of 2060	1988	91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147.exe	31
PID 1988 wrote to memory of 2060	1988	91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147.exe	31
PID 1988 wrote to memory of 2060	1988	91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147.exe	31
PID 2060 wrote to memory of 2116	2060	fmcn.exe	32
PID 2060 wrote to memory of 2116	2060	fmcn.exe	32
PID 2060 wrote to memory of 2116	2060	fmcn.exe	32
PID 2060 wrote to memory of 2116	2060	fmcn.exe	32
PID 2060 wrote to memory of 2116	2060	fmcn.exe	32
PID 2060 wrote to memory of 2116	2060	fmcn.exe	32
PID 2060 wrote to memory of 2116	2060	fmcn.exe	32
PID 2060 wrote to memory of 2116	2060	fmcn.exe	32
PID 2060 wrote to memory of 2116	2060	fmcn.exe	32
PID 2060 wrote to memory of 2116	2060	fmcn.exe	32
PID 1988 wrote to memory of 2872	1988	91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147.exe	33
PID 1988 wrote to memory of 2872	1988	91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147.exe	33
PID 1988 wrote to memory of 2872	1988	91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147.exe	33
PID 1988 wrote to memory of 2872	1988	91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147.exe	33
PID 2116 wrote to memory of 3028	2116	fmcn.exe	35
PID 2116 wrote to memory of 3028	2116	fmcn.exe	35
PID 2116 wrote to memory of 3028	2116	fmcn.exe	35
PID 2116 wrote to memory of 3028	2116	fmcn.exe	35
PID 2116 wrote to memory of 3028	2116	fmcn.exe	35
PID 2116 wrote to memory of 3028	2116	fmcn.exe	35

C:\Users\Admin\AppData\Local\Temp\91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147.exe
"C:\Users\Admin\AppData\Local\Temp\91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:768
- C:\Users\Admin\AppData\Local\Temp\91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147.exe
  "C:\Users\Admin\AppData\Local\Temp\91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147.exe"
  2⤵
  - Loads dropped DLL
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1988
- - C:\Users\Admin\fmcn.exe
    "C:\Users\Admin\fmcn.exe" /r
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2060
  - - C:\Users\Admin\fmcn.exe
      "C:\Users\Admin\fmcn.exe" /r
      4⤵
      Executes dropped EXE
      Suspicious use of SetThreadContext
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:2116
    - - C:\Windows\SysWOW64\svchost.exe
        
        svchost.exe
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:3028
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\Users\Admin\AppData\Local\Temp\7163.bat" "
    3⤵
    - Deletes itself
    - System Location Discovery: System Language Discovery
    PID:2872

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

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\7163.bat

Filesize
135B

MD5
2731052e1a5e17ae017667f8feecc5e6

SHA1
7b4cee1fa1f15fbff273b75233796b2123460cbe

SHA256
41e4e424c259b18c41b00875f2530e634441f5e7489a23ba0100cc7620afd90d

SHA512
f64db7bf232d176e9fcca730c3bf866f0fd8a0db70f820d431d04a23af6053cfdf47913810babea3c55af7ea2b4b0eb02b2653d471b71e7cccd32c45b746273b

Download Submit
\Users\Admin\fmcn.exe

Filesize
185KB

MD5
702a92ee66567914adb65b7148249d1f

SHA1
8fefbb1a949e11480385b0282a2c1c668ce9d353

SHA256
91ba6a559c13fb63e6e0d77b346d0ab7826a92c399a5e4ce0c06137b10589147

SHA512
2959749751c1111f088cdb223a680cb82d5375dbfa4051da75f8d844cbd6a0623c15b17db1c63c4371e952e938538a2b25cfac130b92d4360c69f77fd4016507

Download Submit
memory/1988-6-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1988-10-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1988-0-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1988-4-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1988-2-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1988-14-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1988-12-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1988-48-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1988-8-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/2116-49-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/3028-53-0x00000000000D0000-0x00000000000F6000-memory.dmp

Filesize
152KB

Download
memory/3028-51-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/3028-58-0x00000000000D0000-0x00000000000F6000-memory.dmp

Filesize
152KB

Download
memory/3028-57-0x00000000000D0000-0x00000000000F6000-memory.dmp

Filesize
152KB

Download
memory/3028-62-0x00000000000D0000-0x00000000000F6000-memory.dmp

Filesize
152KB

Download
memory/3028-64-0x00000000000D0000-0x00000000000F6000-memory.dmp

Filesize
152KB

Download
memory/3028-65-0x00000000000D0000-0x00000000000F6000-memory.dmp

Filesize
152KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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