tofsee | e801ec0c491f33580b9474ab6e202b18f6952d48b69019a9c4ed48c279c5cf33

Analysis

max time kernel
151s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
26/03/2024, 12:12

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General

Target
df22722085baaf84cd07e5d92b7ac69a.exe
Size 10.5MB
Sample240326-pdk9aahh62
SHA256 e801ec0c491f33580b9474ab6e202b18f6952d48b69019a9c4ed48c279c5cf33
MD5 df22722085baaf84cd07e5d92b7ac69a
SHA1 9be3215a254149267f6477c8e3e64d18aef0e38d
SHA512 c804dcc3643d69d1a4c330eafddd39e043584220d907d42e7dfeb353f5bc67e0fc0d1614e4e769b1d25b627cbe413369bb13e81243b3d25add5b8ad371589531
SSDEEP 49152:Z88888888888888888888888888888888888888888888888888888888888888f:
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

defeatwax.ru
refabyd.info

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 2 TTPs 1 IoCs

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
3304	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\hgpeothd\ImagePath = "C:\\Windows\\SysWOW64\\hgpeothd\\fjmiudaw.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-1-5-21-609813121-2907144057-1731107329-1000\Control Panel\International\Geo\Nation	df22722085baaf84cd07e5d92b7ac69a.exe

Deletes itself 1 IoCs

pid	Process
4520	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3740	fjmiudaw.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3740 set thread context of 4520	3740	fjmiudaw.exe	111

Launches sc.exe 3 IoCs

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

pid	Process
3536	sc.exe
4436	sc.exe
4136	sc.exe

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

System Information Discovery
T1082

Program crash 2 IoCs

pid	pid_target	Process	procid_target
1436	4064	WerFault.exe	86
3792	3740	WerFault.exe	101

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4064 wrote to memory of 2092	4064	df22722085baaf84cd07e5d92b7ac69a.exe	90
PID 4064 wrote to memory of 2092	4064	df22722085baaf84cd07e5d92b7ac69a.exe	90
PID 4064 wrote to memory of 2092	4064	df22722085baaf84cd07e5d92b7ac69a.exe	90
PID 4064 wrote to memory of 2244	4064	df22722085baaf84cd07e5d92b7ac69a.exe	92
PID 4064 wrote to memory of 2244	4064	df22722085baaf84cd07e5d92b7ac69a.exe	92
PID 4064 wrote to memory of 2244	4064	df22722085baaf84cd07e5d92b7ac69a.exe	92
PID 4064 wrote to memory of 3536	4064	df22722085baaf84cd07e5d92b7ac69a.exe	94
PID 4064 wrote to memory of 3536	4064	df22722085baaf84cd07e5d92b7ac69a.exe	94
PID 4064 wrote to memory of 3536	4064	df22722085baaf84cd07e5d92b7ac69a.exe	94
PID 4064 wrote to memory of 4436	4064	df22722085baaf84cd07e5d92b7ac69a.exe	96
PID 4064 wrote to memory of 4436	4064	df22722085baaf84cd07e5d92b7ac69a.exe	96
PID 4064 wrote to memory of 4436	4064	df22722085baaf84cd07e5d92b7ac69a.exe	96
PID 4064 wrote to memory of 4136	4064	df22722085baaf84cd07e5d92b7ac69a.exe	98
PID 4064 wrote to memory of 4136	4064	df22722085baaf84cd07e5d92b7ac69a.exe	98
PID 4064 wrote to memory of 4136	4064	df22722085baaf84cd07e5d92b7ac69a.exe	98
PID 4064 wrote to memory of 3304	4064	df22722085baaf84cd07e5d92b7ac69a.exe	102
PID 4064 wrote to memory of 3304	4064	df22722085baaf84cd07e5d92b7ac69a.exe	102
PID 4064 wrote to memory of 3304	4064	df22722085baaf84cd07e5d92b7ac69a.exe	102
PID 3740 wrote to memory of 4520	3740	fjmiudaw.exe	111
PID 3740 wrote to memory of 4520	3740	fjmiudaw.exe	111
PID 3740 wrote to memory of 4520	3740	fjmiudaw.exe	111
PID 3740 wrote to memory of 4520	3740	fjmiudaw.exe	111
PID 3740 wrote to memory of 4520	3740	fjmiudaw.exe	111

C:\Users\Admin\AppData\Local\Temp\df22722085baaf84cd07e5d92b7ac69a.exe
"C:\Users\Admin\AppData\Local\Temp\df22722085baaf84cd07e5d92b7ac69a.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4064
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\hgpeothd\
  2⤵
  PID:2092
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\fjmiudaw.exe" C:\Windows\SysWOW64\hgpeothd\
  2⤵
  PID:2244
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create hgpeothd binPath= "C:\Windows\SysWOW64\hgpeothd\fjmiudaw.exe /d\"C:\Users\Admin\AppData\Local\Temp\df22722085baaf84cd07e5d92b7ac69a.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:3536
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description hgpeothd "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:4436
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start hgpeothd
  2⤵
  - Launches sc.exe
  PID:4136
- 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:3304
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4064 -s 1304
  2⤵
  - Program crash
  PID:1436

C:\Windows\SysWOW64\hgpeothd\fjmiudaw.exe
C:\Windows\SysWOW64\hgpeothd\fjmiudaw.exe /d"C:\Users\Admin\AppData\Local\Temp\df22722085baaf84cd07e5d92b7ac69a.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3740
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:4520
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3740 -s 524
  2⤵
  - Program crash
  PID:3792

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4064 -ip 4064
1⤵
PID:1020

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 3740 -ip 3740
1⤵
PID:4996

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

Impair Defenses

T1562

Disable or Modify System Firewall

T1562.004

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

fjmiudaw.exe

Path C:\Users\Admin\AppData\Local\Temp\fjmiudaw.exe
Size 5.6MB
SHA256 ce45efa4712146b5d6b14c4e9b800711d1ed33cdc97661763294d50e6fd95217
MD5 4b2cdf265bdc4663c7d8d5fce329af3a
SHA1 ddf85d2d30c6dd4bd7c7f74a7a1d3180bfe3a8d2
SHA512 d076a1dfc932e43dd055126259de55c7e9dccd3f6ecef16ca427e230f18074ced8c52cf869d59dcbde61cc2f22bfe521c09d563600e87112c9a5b413094c1200
SSDEEP 49152:888888888888888888888888888888888888888888888888888888888888888m:p
MD5 SHA1 SHA512 SSDEEP

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fjmiudaw.exe

Path C:\Windows\SysWOW64\hgpeothd\fjmiudaw.exe
Size 13.3MB
SHA256 27dd0b8dd92e40b9c717f890bbdc2c772954e290ec9c02513fdafb980acdbe7a
MD5 95de3d2d8e0b2f36d46e9df8224207eb
SHA1 dc69d77831d53ec917654cc3a3a8dba797f94ce5
SHA512 7dc449bd4d4fb358f241f8fa2619ebc970808128aaacd5aea32bf4c5fd87135a531a00f7154cbefeabb79dd1839ebe9515f9d22792be87f1e4e49a0dbb049c72
SSDEEP 49152:888888888888888888888888888888888888888888888888888888888888888X:
MD5 SHA1 SHA512 SSDEEP

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memory/3740-18-0x0000000000400000-0x0000000002C68000-memory.dmp

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memory/3740-12-0x0000000000400000-0x0000000002C68000-memory.dmp

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memory/3740-11-0x0000000002EA0000-0x0000000002FA0000-memory.dmp

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memory/4064-5-0x0000000000400000-0x0000000002C68000-memory.dmp

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memory/4064-9-0x0000000000400000-0x0000000002C68000-memory.dmp

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memory/4064-10-0x00000000049B0000-0x00000000049C3000-memory.dmp

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memory/4064-1-0x0000000002D40000-0x0000000002E40000-memory.dmp

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memory/4064-3-0x0000000000400000-0x0000000002C68000-memory.dmp

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memory/4064-2-0x00000000049B0000-0x00000000049C3000-memory.dmp

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memory/4520-13-0x0000000000410000-0x0000000000425000-memory.dmp

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memory/4520-17-0x0000000000410000-0x0000000000425000-memory.dmp

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memory/4520-19-0x0000000000410000-0x0000000000425000-memory.dmp

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memory/4520-20-0x0000000000410000-0x0000000000425000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads