tofsee | ef514682a7ab092326100883aa5a4101cb49a2054f538e3731d80c19e065f016

General

Target

file.exe
Size

350KB
MD5

64b84c266e164427f5ff999f0852817c
SHA1

2ac627bc23ec6669c2d8a95f6c3f35c6e1e753a9
SHA256

ef514682a7ab092326100883aa5a4101cb49a2054f538e3731d80c19e065f016
SHA512

f1e36be5e459c71eef8c3880d3cb905bf7f4f909fe00bafb255b45e89b1657cbb3cb6596ffe91751fe690dd7d1923ad8884a4198813ce4a0253ea4025c9ff69b
SSDEEP

6144:Y825LbuPCD71fzEEtPBYNd2LNDRyjkuRjMgU:Y7nuKRlRKd2RDA1RQg

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

jotunheim.name

Signatures

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

Windows security bypass 2 TTPs 1 IoCs

evasion trojan

Disabling Security Tools

T1089

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\SysWOW64\ugdcnrio = "0"	svchost.exe

Creates new service(s) 1 TTPs
persistence

New Service
T1050
Executes dropped EXE 1 IoCs

Processes:

jgabygwd.exe

pid process

580 jgabygwd.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

520 netsh.exe

pid	process
580	jgabygwd.exe

pid	process
520	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\ugdcnrio\ImagePath = "C:\\Windows\\SysWOW64\\ugdcnrio\\jgabygwd.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

1468 svchost.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

jgabygwd.exe

description pid process target process

PID 580 set thread context of 1468 580 jgabygwd.exe svchost.exe
Launches sc.exe 3 IoCs
Sc.exe is a Windows utlilty to control services on the system.

Processes:

sc.exesc.exesc.exe

pid process

1828 sc.exe
1340 sc.exe
1824 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

pid	process
1468	svchost.exe

description	pid	process	target process
PID 580 set thread context of 1468	580	jgabygwd.exe	svchost.exe

pid	process
1828	sc.exe
1340	sc.exe
1824	sc.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

file.exejgabygwd.exe

description	pid	process	target process
PID 1668 wrote to memory of 1348	1668	file.exe	cmd.exe
PID 1668 wrote to memory of 1348	1668	file.exe	cmd.exe
PID 1668 wrote to memory of 1348	1668	file.exe	cmd.exe
PID 1668 wrote to memory of 1348	1668	file.exe	cmd.exe
PID 1668 wrote to memory of 1840	1668	file.exe	cmd.exe
PID 1668 wrote to memory of 1840	1668	file.exe	cmd.exe
PID 1668 wrote to memory of 1840	1668	file.exe	cmd.exe
PID 1668 wrote to memory of 1840	1668	file.exe	cmd.exe
PID 1668 wrote to memory of 1828	1668	file.exe	sc.exe
PID 1668 wrote to memory of 1828	1668	file.exe	sc.exe
PID 1668 wrote to memory of 1828	1668	file.exe	sc.exe
PID 1668 wrote to memory of 1828	1668	file.exe	sc.exe
PID 1668 wrote to memory of 1340	1668	file.exe	sc.exe
PID 1668 wrote to memory of 1340	1668	file.exe	sc.exe
PID 1668 wrote to memory of 1340	1668	file.exe	sc.exe
PID 1668 wrote to memory of 1340	1668	file.exe	sc.exe
PID 1668 wrote to memory of 1824	1668	file.exe	sc.exe
PID 1668 wrote to memory of 1824	1668	file.exe	sc.exe
PID 1668 wrote to memory of 1824	1668	file.exe	sc.exe
PID 1668 wrote to memory of 1824	1668	file.exe	sc.exe
PID 1668 wrote to memory of 520	1668	file.exe	netsh.exe
PID 1668 wrote to memory of 520	1668	file.exe	netsh.exe
PID 1668 wrote to memory of 520	1668	file.exe	netsh.exe
PID 1668 wrote to memory of 520	1668	file.exe	netsh.exe
PID 580 wrote to memory of 1468	580	jgabygwd.exe	svchost.exe
PID 580 wrote to memory of 1468	580	jgabygwd.exe	svchost.exe
PID 580 wrote to memory of 1468	580	jgabygwd.exe	svchost.exe
PID 580 wrote to memory of 1468	580	jgabygwd.exe	svchost.exe
PID 580 wrote to memory of 1468	580	jgabygwd.exe	svchost.exe
PID 580 wrote to memory of 1468	580	jgabygwd.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1668

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ugdcnrio\
2⤵
PID:1348

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\jgabygwd.exe" C:\Windows\SysWOW64\ugdcnrio\
2⤵
PID:1840

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create ugdcnrio binPath= "C:\Windows\SysWOW64\ugdcnrio\jgabygwd.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:1828

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description ugdcnrio "wifi internet conection"
2⤵
- Launches sc.exe
PID:1340

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start ugdcnrio
2⤵
- Launches sc.exe
PID:1824

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:520

C:\Windows\SysWOW64\ugdcnrio\jgabygwd.exe
C:\Windows\SysWOW64\ugdcnrio\jgabygwd.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:580

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Windows security bypass
- Sets service image path in registry
- Deletes itself
PID:1468

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

New Service

1

T1050

Modify Existing Service

1

T1031

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

New Service

1

T1050

Defense Evasion

Disabling Security Tools

1

T1089

Modify Registry

2

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\jgabygwd.exe
Filesize
14.0MB

MD5
dba0612823bbf6f8e9192e0e2c5b7928

SHA1
be50987f212a315cc30622943d40cdc3558e8eb9

SHA256
a9b2c3d538bce40f036a33b369b59df69d23b29d3448dadcdafb5bdc7d975ea7

SHA512
8a65fbbf0b8f10ac1bae59d075053ea1872a6199291506e75f440aea2e7cd6b6b1039f17b95c93d98581dcd5b1d7c3fe957eef613f2874565275be65559e2ad3

Download Submit
C:\Windows\SysWOW64\ugdcnrio\jgabygwd.exe
Filesize
14.0MB

MD5
dba0612823bbf6f8e9192e0e2c5b7928

SHA1
be50987f212a315cc30622943d40cdc3558e8eb9

SHA256
a9b2c3d538bce40f036a33b369b59df69d23b29d3448dadcdafb5bdc7d975ea7

SHA512
8a65fbbf0b8f10ac1bae59d075053ea1872a6199291506e75f440aea2e7cd6b6b1039f17b95c93d98581dcd5b1d7c3fe957eef613f2874565275be65559e2ad3

Download Submit
memory/520-65-0x0000000000000000-mapping.dmp

Download
memory/580-74-0x000000000050A000-0x000000000051F000-memory.dmp

Filesize
84KB

Download
memory/580-76-0x0000000000400000-0x000000000045D000-memory.dmp

Filesize
372KB

Download
memory/1340-62-0x0000000000000000-mapping.dmp

Download
memory/1348-58-0x0000000000000000-mapping.dmp

Download
memory/1468-72-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1468-70-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1468-80-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1468-79-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1468-73-0x0000000000089A6B-mapping.dmp

Download
memory/1668-57-0x0000000000400000-0x000000000045D000-memory.dmp

Filesize
372KB

Download
memory/1668-67-0x0000000000400000-0x000000000045D000-memory.dmp

Filesize
372KB

Download
memory/1668-66-0x000000000026A000-0x000000000027F000-memory.dmp

Filesize
84KB

Download
memory/1668-54-0x0000000075071000-0x0000000075073000-memory.dmp

Filesize
8KB

Download
memory/1668-56-0x00000000003C0000-0x00000000003D3000-memory.dmp

Filesize
76KB

Download
memory/1668-55-0x000000000026A000-0x000000000027F000-memory.dmp

Filesize
84KB

Download
memory/1824-63-0x0000000000000000-mapping.dmp

Download
memory/1828-61-0x0000000000000000-mapping.dmp

Download
memory/1840-59-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads