tofsee | d7b88f392653a4569f1f6a792d27ed75dcb22921915ff2cff23519d6eb8c673a

Analysis

max time kernel
122s
max time network
144s
platform
windows7_x64
resource
win7-20230831-en
resource tags

arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
submitted
14-10-2023 02:12

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General

Target

file.exe
Size

298KB
MD5

5182e126b6f798ddb20ac56c5ab4660d
SHA1

467a4e7708679aac87c2a4e98b9c69eba12dc21b
SHA256

d7b88f392653a4569f1f6a792d27ed75dcb22921915ff2cff23519d6eb8c673a
SHA512

37b25dc5c340817881922fc7b9fa4a06e1954cae86afee74d174c905e7be366edfe9329888bbcd46d3c8bae1d295c7dd13e0b78bc408d341b5d5d42c7301d4b8
SSDEEP

3072:w+uHkj3i/Gur0Z6sZgrKBRTM+4FvH9vxrFUkcVTcgpWvKV/Fy2L3:4Hci/GuoZ6pmBSJrJpUpV4gEY4

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

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) 1 TTPs
persistence

Windows Service
T1543.003

Modifies Windows Firewall 1 TTPs 1 IoCs

evasion

Windows Service

T1543.003

pid	Process
2608	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\ewbqqmlr\ImagePath = "C:\\Windows\\SysWOW64\\ewbqqmlr\\tiahmkph.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2512	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2520	tiahmkph.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2520 set thread context of 2512	2520	tiahmkph.exe	42

Launches sc.exe 3 IoCs

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

pid	Process
2880	sc.exe
2884	sc.exe
2504	sc.exe

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

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2184 wrote to memory of 1332	2184	file.exe	29
PID 2184 wrote to memory of 1332	2184	file.exe	29
PID 2184 wrote to memory of 1332	2184	file.exe	29
PID 2184 wrote to memory of 1332	2184	file.exe	29
PID 2184 wrote to memory of 2644	2184	file.exe	31
PID 2184 wrote to memory of 2644	2184	file.exe	31
PID 2184 wrote to memory of 2644	2184	file.exe	31
PID 2184 wrote to memory of 2644	2184	file.exe	31
PID 2184 wrote to memory of 2884	2184	file.exe	33
PID 2184 wrote to memory of 2884	2184	file.exe	33
PID 2184 wrote to memory of 2884	2184	file.exe	33
PID 2184 wrote to memory of 2884	2184	file.exe	33
PID 2184 wrote to memory of 2504	2184	file.exe	35
PID 2184 wrote to memory of 2504	2184	file.exe	35
PID 2184 wrote to memory of 2504	2184	file.exe	35
PID 2184 wrote to memory of 2504	2184	file.exe	35
PID 2184 wrote to memory of 2880	2184	file.exe	37
PID 2184 wrote to memory of 2880	2184	file.exe	37
PID 2184 wrote to memory of 2880	2184	file.exe	37
PID 2184 wrote to memory of 2880	2184	file.exe	37
PID 2184 wrote to memory of 2608	2184	file.exe	40
PID 2184 wrote to memory of 2608	2184	file.exe	40
PID 2184 wrote to memory of 2608	2184	file.exe	40
PID 2184 wrote to memory of 2608	2184	file.exe	40
PID 2520 wrote to memory of 2512	2520	tiahmkph.exe	42
PID 2520 wrote to memory of 2512	2520	tiahmkph.exe	42
PID 2520 wrote to memory of 2512	2520	tiahmkph.exe	42
PID 2520 wrote to memory of 2512	2520	tiahmkph.exe	42
PID 2520 wrote to memory of 2512	2520	tiahmkph.exe	42
PID 2520 wrote to memory of 2512	2520	tiahmkph.exe	42

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2184
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ewbqqmlr\
  2⤵
  PID:1332
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\tiahmkph.exe" C:\Windows\SysWOW64\ewbqqmlr\
  2⤵
  PID:2644
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create ewbqqmlr binPath= "C:\Windows\SysWOW64\ewbqqmlr\tiahmkph.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:2884
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description ewbqqmlr "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:2504
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start ewbqqmlr
  2⤵
  - Launches sc.exe
  PID:2880
- 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
  PID:2608

C:\Windows\SysWOW64\ewbqqmlr\tiahmkph.exe
C:\Windows\SysWOW64\ewbqqmlr\tiahmkph.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2520
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:2512

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

Create or Modify System Process

T1543

Windows Service

T1543.003

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

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
11.6MB

MD5
7a2348dcbcda6d78cadb59900c64e401

SHA1
16ff98dfe4ec4eccbd1ab49cf72c88a61fbaa036

SHA256
74c1b7c197e47becdf0b3ac185c7e256c58d9ebb0de4ae33720b9947a292c7e8

SHA512
3e0dbb4299bd2c2435813f5b58f1e75ed20c7b17e35c574ea53941ef1506e208b1e8281635a1d78b3ad8d229999c879b548f979489f1c35cc4a40563d7b5a57a

Download Submit
C:\Windows\SysWOW64\ewbqqmlr\tiahmkph.exe

Filesize
11.6MB

MD5
7a2348dcbcda6d78cadb59900c64e401

SHA1
16ff98dfe4ec4eccbd1ab49cf72c88a61fbaa036

SHA256
74c1b7c197e47becdf0b3ac185c7e256c58d9ebb0de4ae33720b9947a292c7e8

SHA512
3e0dbb4299bd2c2435813f5b58f1e75ed20c7b17e35c574ea53941ef1506e208b1e8281635a1d78b3ad8d229999c879b548f979489f1c35cc4a40563d7b5a57a

Download Submit
memory/2184-9-0x0000000000400000-0x0000000002290000-memory.dmp

Filesize
30.6MB

Download
memory/2184-4-0x0000000000400000-0x0000000002290000-memory.dmp

Filesize
30.6MB

Download
memory/2184-2-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/2184-1-0x0000000002440000-0x0000000002540000-memory.dmp

Filesize
1024KB

Download
memory/2512-10-0x0000000000100000-0x0000000000115000-memory.dmp

Filesize
84KB

Download
memory/2512-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2512-15-0x0000000000100000-0x0000000000115000-memory.dmp

Filesize
84KB

Download
memory/2512-20-0x0000000000100000-0x0000000000115000-memory.dmp

Filesize
84KB

Download
memory/2512-21-0x0000000000100000-0x0000000000115000-memory.dmp

Filesize
84KB

Download
memory/2520-8-0x0000000000380000-0x0000000000393000-memory.dmp

Filesize
76KB

Download
memory/2520-11-0x0000000000400000-0x0000000002290000-memory.dmp

Filesize
30.6MB

Download
memory/2520-13-0x00000000023E0000-0x00000000024E0000-memory.dmp

Filesize
1024KB

Download
memory/2520-17-0x0000000000400000-0x0000000002290000-memory.dmp

Filesize
30.6MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads