tofsee | 3883c4f0ba615b5b49c68de143fbd85d4e62966c9a890ccf49794e0801b9b44b

Analysis

max time kernel
153s
max time network
164s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
01/01/2024, 00:11

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General

Target
3b6b4f7a154a49d7e20f3bb6009bb595.exe
Size 12.5MB
Sample240101-ags1zabbe4
SHA256 3883c4f0ba615b5b49c68de143fbd85d4e62966c9a890ccf49794e0801b9b44b
MD5 3b6b4f7a154a49d7e20f3bb6009bb595
SHA1 dcb3685d6218dac41b56f7b8771d7c3b99adfd2b
SHA512 41e69ba7d1e06dfc5e4a0616716d56849f27f248771e301985b7769475826f19e9acdaece804b6babefc85ad057c600ebdffeae3f97b0ddeb836ddbf3f2e8950
SSDEEP 49152:kj55555555555555555555555555555555555555555555555555555555555551:
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

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) 1 TTPs
persistence

Windows Service
T1543.003

Modifies Windows Firewall 1 TTPs 1 IoCs

evasion

Windows Service

T1543.003

pid	Process
2976	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\eackmboz\ImagePath = "C:\\Windows\\SysWOW64\\eackmboz\\gidulfmf.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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	3b6b4f7a154a49d7e20f3bb6009bb595.exe

Deletes itself 1 IoCs

pid	Process
944	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2296	gidulfmf.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2296 set thread context of 944	2296	gidulfmf.exe	106

Launches sc.exe 3 IoCs

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

pid	Process
3808	sc.exe
484	sc.exe
4996	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 23 IoCs

description	pid	Process	procid_target
PID 4200 wrote to memory of 1400	4200	3b6b4f7a154a49d7e20f3bb6009bb595.exe	93
PID 4200 wrote to memory of 1400	4200	3b6b4f7a154a49d7e20f3bb6009bb595.exe	93
PID 4200 wrote to memory of 1400	4200	3b6b4f7a154a49d7e20f3bb6009bb595.exe	93
PID 4200 wrote to memory of 888	4200	3b6b4f7a154a49d7e20f3bb6009bb595.exe	95
PID 4200 wrote to memory of 888	4200	3b6b4f7a154a49d7e20f3bb6009bb595.exe	95
PID 4200 wrote to memory of 888	4200	3b6b4f7a154a49d7e20f3bb6009bb595.exe	95
PID 4200 wrote to memory of 484	4200	3b6b4f7a154a49d7e20f3bb6009bb595.exe	97
PID 4200 wrote to memory of 484	4200	3b6b4f7a154a49d7e20f3bb6009bb595.exe	97
PID 4200 wrote to memory of 484	4200	3b6b4f7a154a49d7e20f3bb6009bb595.exe	97
PID 4200 wrote to memory of 4996	4200	3b6b4f7a154a49d7e20f3bb6009bb595.exe	99
PID 4200 wrote to memory of 4996	4200	3b6b4f7a154a49d7e20f3bb6009bb595.exe	99
PID 4200 wrote to memory of 4996	4200	3b6b4f7a154a49d7e20f3bb6009bb595.exe	99
PID 4200 wrote to memory of 3808	4200	3b6b4f7a154a49d7e20f3bb6009bb595.exe	101
PID 4200 wrote to memory of 3808	4200	3b6b4f7a154a49d7e20f3bb6009bb595.exe	101
PID 4200 wrote to memory of 3808	4200	3b6b4f7a154a49d7e20f3bb6009bb595.exe	101
PID 4200 wrote to memory of 2976	4200	3b6b4f7a154a49d7e20f3bb6009bb595.exe	103
PID 4200 wrote to memory of 2976	4200	3b6b4f7a154a49d7e20f3bb6009bb595.exe	103
PID 4200 wrote to memory of 2976	4200	3b6b4f7a154a49d7e20f3bb6009bb595.exe	103
PID 2296 wrote to memory of 944	2296	gidulfmf.exe	106
PID 2296 wrote to memory of 944	2296	gidulfmf.exe	106
PID 2296 wrote to memory of 944	2296	gidulfmf.exe	106
PID 2296 wrote to memory of 944	2296	gidulfmf.exe	106
PID 2296 wrote to memory of 944	2296	gidulfmf.exe	106

C:\Users\Admin\AppData\Local\Temp\3b6b4f7a154a49d7e20f3bb6009bb595.exe
"C:\Users\Admin\AppData\Local\Temp\3b6b4f7a154a49d7e20f3bb6009bb595.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4200
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\eackmboz\
  2⤵
  PID:1400
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\gidulfmf.exe" C:\Windows\SysWOW64\eackmboz\
  2⤵
  PID:888
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create eackmboz binPath= "C:\Windows\SysWOW64\eackmboz\gidulfmf.exe /d\"C:\Users\Admin\AppData\Local\Temp\3b6b4f7a154a49d7e20f3bb6009bb595.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:484
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description eackmboz "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:4996
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start eackmboz
  2⤵
  - Launches sc.exe
  PID:3808
- 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:2976

C:\Windows\SysWOW64\eackmboz\gidulfmf.exe
C:\Windows\SysWOW64\eackmboz\gidulfmf.exe /d"C:\Users\Admin\AppData\Local\Temp\3b6b4f7a154a49d7e20f3bb6009bb595.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2296
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:944

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

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

gidulfmf.exe

Path C:\Users\Admin\AppData\Local\Temp\gidulfmf.exe
Size 12.9MB
SHA256 c39fc72fd25abf322691abb2433319a1104c732cea957909d5be981ac769ebf1
MD5 10e32f7d1b63414200a9c395ad26af91
SHA1 ffffaf9d4d57234625f6feab3ac0adeeceb94cf9
SHA512 05842405a76dce99dbfd20e4741ffdf8f471d2325732211da122bf41eec5a2069b180d449284d340df5354d48eb8cc564d80fc9d5c2587e446624f0fb0163e2c
SSDEEP 49152:Oj5555555555555555555555555555555555555555555555555555555555555/:
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/944-12-0x0000000000C50000-0x0000000000C65000-memory.dmp

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memory/944-18-0x0000000000C50000-0x0000000000C65000-memory.dmp

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memory/944-17-0x0000000000C50000-0x0000000000C65000-memory.dmp

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memory/944-16-0x0000000000C50000-0x0000000000C65000-memory.dmp

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memory/944-15-0x0000000000C50000-0x0000000000C65000-memory.dmp

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memory/2296-13-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/2296-9-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/2296-10-0x0000000000500000-0x0000000000501000-memory.dmp

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memory/4200-1-0x0000000000580000-0x0000000000581000-memory.dmp

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memory/4200-7-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/4200-5-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/4200-0-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/4200-3-0x0000000000590000-0x0000000000591000-memory.dmp

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memory/4200-2-0x0000000000400000-0x000000000041E000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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