tofsee | 71cdbb0fb6224d66464401d027ed5810fd46fc05988b8b8f6e957ee15a137532

Analysis

max time kernel
144s
max time network
120s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
27-12-2024 23:01

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General

Target

71cdbb0fb6224d66464401d027ed5810fd46fc05988b8b8f6e957ee15a137532.exe
Size

176KB
MD5

5f7fe860cb3496ceec0ef338b6781f90
SHA1

941868e3c0fee15f6ecf3bd3429765f693a63dce
SHA256

71cdbb0fb6224d66464401d027ed5810fd46fc05988b8b8f6e957ee15a137532
SHA512

efb6c1bd50384285eb51805eb28b9dc62ad9b6fa5b7bbe0006d5bd142c7686be79249a33eb9466d292aa0a91611eeaaa285535bd0eb7bad7ad8649705695e479
SSDEEP

3072:+zE7torPMLERyENUYZ8EnfHsEdF9zbjbTrlMzLjrMsUzbjULt1dlGR1tldle/sYW:mEJAUgME57

Score

10^/10

tofsee discovery persistence trojan

Malware Config

Extracted

Family

tofsee

103.246.115.238

188.190.114.20

112.213.106.187

188.165.132.183

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
2220	cmd.exe

Executes dropped EXE 2 IoCs

pid	Process
1800	chgjzbmt.exe
2592	chgjzbmt.exe

Loads dropped DLL 2 IoCs

pid	Process
1996	71cdbb0fb6224d66464401d027ed5810fd46fc05988b8b8f6e957ee15a137532.exe
1996	71cdbb0fb6224d66464401d027ed5810fd46fc05988b8b8f6e957ee15a137532.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-1-5-21-2703099537-420551529-3771253338-1000\Software\Microsoft\Windows\CurrentVersion\Run\MSConfig = "\"C:\\Users\\Admin\\chgjzbmt.exe\""	71cdbb0fb6224d66464401d027ed5810fd46fc05988b8b8f6e957ee15a137532.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2088 set thread context of 1996	2088	71cdbb0fb6224d66464401d027ed5810fd46fc05988b8b8f6e957ee15a137532.exe	31
PID 1800 set thread context of 2592	1800	chgjzbmt.exe	35
PID 2592 set thread context of 2724	2592	chgjzbmt.exe	36

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

System Information Discovery
T1082

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	71cdbb0fb6224d66464401d027ed5810fd46fc05988b8b8f6e957ee15a137532.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	71cdbb0fb6224d66464401d027ed5810fd46fc05988b8b8f6e957ee15a137532.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	chgjzbmt.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	chgjzbmt.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2088	71cdbb0fb6224d66464401d027ed5810fd46fc05988b8b8f6e957ee15a137532.exe
1800	chgjzbmt.exe

Suspicious use of WriteProcessMemory 34 IoCs

description	pid	Process	procid_target
PID 2088 wrote to memory of 1996	2088	71cdbb0fb6224d66464401d027ed5810fd46fc05988b8b8f6e957ee15a137532.exe	31
PID 2088 wrote to memory of 1996	2088	71cdbb0fb6224d66464401d027ed5810fd46fc05988b8b8f6e957ee15a137532.exe	31
PID 2088 wrote to memory of 1996	2088	71cdbb0fb6224d66464401d027ed5810fd46fc05988b8b8f6e957ee15a137532.exe	31
PID 2088 wrote to memory of 1996	2088	71cdbb0fb6224d66464401d027ed5810fd46fc05988b8b8f6e957ee15a137532.exe	31
PID 2088 wrote to memory of 1996	2088	71cdbb0fb6224d66464401d027ed5810fd46fc05988b8b8f6e957ee15a137532.exe	31
PID 2088 wrote to memory of 1996	2088	71cdbb0fb6224d66464401d027ed5810fd46fc05988b8b8f6e957ee15a137532.exe	31
PID 2088 wrote to memory of 1996	2088	71cdbb0fb6224d66464401d027ed5810fd46fc05988b8b8f6e957ee15a137532.exe	31
PID 2088 wrote to memory of 1996	2088	71cdbb0fb6224d66464401d027ed5810fd46fc05988b8b8f6e957ee15a137532.exe	31
PID 2088 wrote to memory of 1996	2088	71cdbb0fb6224d66464401d027ed5810fd46fc05988b8b8f6e957ee15a137532.exe	31
PID 2088 wrote to memory of 1996	2088	71cdbb0fb6224d66464401d027ed5810fd46fc05988b8b8f6e957ee15a137532.exe	31
PID 1996 wrote to memory of 1800	1996	71cdbb0fb6224d66464401d027ed5810fd46fc05988b8b8f6e957ee15a137532.exe	32
PID 1996 wrote to memory of 1800	1996	71cdbb0fb6224d66464401d027ed5810fd46fc05988b8b8f6e957ee15a137532.exe	32
PID 1996 wrote to memory of 1800	1996	71cdbb0fb6224d66464401d027ed5810fd46fc05988b8b8f6e957ee15a137532.exe	32
PID 1996 wrote to memory of 1800	1996	71cdbb0fb6224d66464401d027ed5810fd46fc05988b8b8f6e957ee15a137532.exe	32
PID 1996 wrote to memory of 2220	1996	71cdbb0fb6224d66464401d027ed5810fd46fc05988b8b8f6e957ee15a137532.exe	33
PID 1996 wrote to memory of 2220	1996	71cdbb0fb6224d66464401d027ed5810fd46fc05988b8b8f6e957ee15a137532.exe	33
PID 1996 wrote to memory of 2220	1996	71cdbb0fb6224d66464401d027ed5810fd46fc05988b8b8f6e957ee15a137532.exe	33
PID 1996 wrote to memory of 2220	1996	71cdbb0fb6224d66464401d027ed5810fd46fc05988b8b8f6e957ee15a137532.exe	33
PID 1800 wrote to memory of 2592	1800	chgjzbmt.exe	35
PID 1800 wrote to memory of 2592	1800	chgjzbmt.exe	35
PID 1800 wrote to memory of 2592	1800	chgjzbmt.exe	35
PID 1800 wrote to memory of 2592	1800	chgjzbmt.exe	35
PID 1800 wrote to memory of 2592	1800	chgjzbmt.exe	35
PID 1800 wrote to memory of 2592	1800	chgjzbmt.exe	35
PID 1800 wrote to memory of 2592	1800	chgjzbmt.exe	35
PID 1800 wrote to memory of 2592	1800	chgjzbmt.exe	35
PID 1800 wrote to memory of 2592	1800	chgjzbmt.exe	35
PID 1800 wrote to memory of 2592	1800	chgjzbmt.exe	35
PID 2592 wrote to memory of 2724	2592	chgjzbmt.exe	36
PID 2592 wrote to memory of 2724	2592	chgjzbmt.exe	36
PID 2592 wrote to memory of 2724	2592	chgjzbmt.exe	36
PID 2592 wrote to memory of 2724	2592	chgjzbmt.exe	36
PID 2592 wrote to memory of 2724	2592	chgjzbmt.exe	36
PID 2592 wrote to memory of 2724	2592	chgjzbmt.exe	36

C:\Users\Admin\AppData\Local\Temp\71cdbb0fb6224d66464401d027ed5810fd46fc05988b8b8f6e957ee15a137532.exe
"C:\Users\Admin\AppData\Local\Temp\71cdbb0fb6224d66464401d027ed5810fd46fc05988b8b8f6e957ee15a137532.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2088
- C:\Users\Admin\AppData\Local\Temp\71cdbb0fb6224d66464401d027ed5810fd46fc05988b8b8f6e957ee15a137532.exe
  "C:\Users\Admin\AppData\Local\Temp\71cdbb0fb6224d66464401d027ed5810fd46fc05988b8b8f6e957ee15a137532.exe"
  2⤵
  - Loads dropped DLL
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1996
- - C:\Users\Admin\chgjzbmt.exe
    "C:\Users\Admin\chgjzbmt.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1800
  - - C:\Users\Admin\chgjzbmt.exe
      "C:\Users\Admin\chgjzbmt.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of SetThreadContext
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:2592
    - - C:\Windows\SysWOW64\svchost.exe
        
        svchost.exe
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:2724
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\Users\Admin\AppData\Local\Temp\3513.bat" "
    3⤵
    - Deletes itself
    - System Location Discovery: System Language Discovery
    PID:2220

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 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

C:\Users\Admin\AppData\Local\Temp\3513.bat

Filesize
302B

MD5
af07ec8d6fedfd395885c67ece9603a8

SHA1
98286975fe184a8f5de80d67924bc38204383346

SHA256
79ef568ba5ec4183b2bc19db7aa587082c35eb1fb72b66de23f5f526fd93af68

SHA512
597f46cc7ad962b889554ef05001c6870fa08e95224d7ea3cb12b64acbfe5c2f7f5ec972cf477422a1ee80644be27f0890f3723c5cc4adee1fef361ac68d7e76

Download Submit
C:\Users\Admin\chgjzbmt.exe

Filesize
176KB

MD5
5f7fe860cb3496ceec0ef338b6781f90

SHA1
941868e3c0fee15f6ecf3bd3429765f693a63dce

SHA256
71cdbb0fb6224d66464401d027ed5810fd46fc05988b8b8f6e957ee15a137532

SHA512
efb6c1bd50384285eb51805eb28b9dc62ad9b6fa5b7bbe0006d5bd142c7686be79249a33eb9466d292aa0a91611eeaaa285535bd0eb7bad7ad8649705695e479

Download Submit
memory/1800-20-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1996-4-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1996-6-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1996-8-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1996-30-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2088-3-0x0000000000230000-0x0000000000330000-memory.dmp

Filesize
1024KB

Download
memory/2592-35-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2592-40-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2724-39-0x0000000000080000-0x0000000000092000-memory.dmp

Filesize
72KB

Download
memory/2724-42-0x0000000000080000-0x0000000000092000-memory.dmp

Filesize
72KB

Download
memory/2724-38-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2724-36-0x0000000000080000-0x0000000000092000-memory.dmp

Filesize
72KB

Download
memory/2724-43-0x0000000000080000-0x0000000000092000-memory.dmp

Filesize
72KB

Download
memory/2724-44-0x0000000000080000-0x0000000000092000-memory.dmp

Filesize
72KB

Download
memory/2724-48-0x0000000000080000-0x0000000000092000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads