tofsee | 628c1bfb9195b74c5a9846331f42886bc78aed36ac4049d010fe62fe4347f7ab

General

Target

18643a9a6e4b61e967e428fadb2d4bb52dfed8a949b4a39cb461c2e3a8e6d207.exe
Size

303KB
MD5

dd18a455e9d700d656ce6965cee1a068
SHA1

bb23d970e98a6a6ec178fc6c9c82689b3e92ee7c
SHA256

18643a9a6e4b61e967e428fadb2d4bb52dfed8a949b4a39cb461c2e3a8e6d207
SHA512

71dc5ce080f2f95f2b68bcd135cfbbb9d020e10f58972b4f90ac98a3794f7791857139d45f417d127182bb26caca996a94c95008f2fc0ccc8a3c1b16dd07b531
SSDEEP

3072:duhpDHOnUv1WfCBuL4IdkVDJNhA+GHRIBiSp5z5DT4zknffhd+OH:shpDH9vEfQQrdkB7Fi05ykn3v+y

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

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

New Service
T1050
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

1268 netsh.exe

pid	process
1268	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\tiutgkcm\ImagePath = "C:\\Windows\\SysWOW64\\tiutgkcm\\oeapkcai.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

692 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

oeapkcai.exe

pid process

976 oeapkcai.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

oeapkcai.exe

description pid process target process

PID 976 set thread context of 692 976 oeapkcai.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

1736 sc.exe
1204 sc.exe
1108 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
692	svchost.exe

pid	process
976	oeapkcai.exe

description	pid	process	target process
PID 976 set thread context of 692	976	oeapkcai.exe	svchost.exe

pid	process
1736	sc.exe
1204	sc.exe
1108	sc.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

18643a9a6e4b61e967e428fadb2d4bb52dfed8a949b4a39cb461c2e3a8e6d207.exeoeapkcai.exe

description	pid	process	target process
PID 924 wrote to memory of 436	924	18643a9a6e4b61e967e428fadb2d4bb52dfed8a949b4a39cb461c2e3a8e6d207.exe	cmd.exe
PID 924 wrote to memory of 436	924	18643a9a6e4b61e967e428fadb2d4bb52dfed8a949b4a39cb461c2e3a8e6d207.exe	cmd.exe
PID 924 wrote to memory of 436	924	18643a9a6e4b61e967e428fadb2d4bb52dfed8a949b4a39cb461c2e3a8e6d207.exe	cmd.exe
PID 924 wrote to memory of 436	924	18643a9a6e4b61e967e428fadb2d4bb52dfed8a949b4a39cb461c2e3a8e6d207.exe	cmd.exe
PID 924 wrote to memory of 1416	924	18643a9a6e4b61e967e428fadb2d4bb52dfed8a949b4a39cb461c2e3a8e6d207.exe	cmd.exe
PID 924 wrote to memory of 1416	924	18643a9a6e4b61e967e428fadb2d4bb52dfed8a949b4a39cb461c2e3a8e6d207.exe	cmd.exe
PID 924 wrote to memory of 1416	924	18643a9a6e4b61e967e428fadb2d4bb52dfed8a949b4a39cb461c2e3a8e6d207.exe	cmd.exe
PID 924 wrote to memory of 1416	924	18643a9a6e4b61e967e428fadb2d4bb52dfed8a949b4a39cb461c2e3a8e6d207.exe	cmd.exe
PID 924 wrote to memory of 1736	924	18643a9a6e4b61e967e428fadb2d4bb52dfed8a949b4a39cb461c2e3a8e6d207.exe	sc.exe
PID 924 wrote to memory of 1736	924	18643a9a6e4b61e967e428fadb2d4bb52dfed8a949b4a39cb461c2e3a8e6d207.exe	sc.exe
PID 924 wrote to memory of 1736	924	18643a9a6e4b61e967e428fadb2d4bb52dfed8a949b4a39cb461c2e3a8e6d207.exe	sc.exe
PID 924 wrote to memory of 1736	924	18643a9a6e4b61e967e428fadb2d4bb52dfed8a949b4a39cb461c2e3a8e6d207.exe	sc.exe
PID 924 wrote to memory of 1204	924	18643a9a6e4b61e967e428fadb2d4bb52dfed8a949b4a39cb461c2e3a8e6d207.exe	sc.exe
PID 924 wrote to memory of 1204	924	18643a9a6e4b61e967e428fadb2d4bb52dfed8a949b4a39cb461c2e3a8e6d207.exe	sc.exe
PID 924 wrote to memory of 1204	924	18643a9a6e4b61e967e428fadb2d4bb52dfed8a949b4a39cb461c2e3a8e6d207.exe	sc.exe
PID 924 wrote to memory of 1204	924	18643a9a6e4b61e967e428fadb2d4bb52dfed8a949b4a39cb461c2e3a8e6d207.exe	sc.exe
PID 924 wrote to memory of 1108	924	18643a9a6e4b61e967e428fadb2d4bb52dfed8a949b4a39cb461c2e3a8e6d207.exe	sc.exe
PID 924 wrote to memory of 1108	924	18643a9a6e4b61e967e428fadb2d4bb52dfed8a949b4a39cb461c2e3a8e6d207.exe	sc.exe
PID 924 wrote to memory of 1108	924	18643a9a6e4b61e967e428fadb2d4bb52dfed8a949b4a39cb461c2e3a8e6d207.exe	sc.exe
PID 924 wrote to memory of 1108	924	18643a9a6e4b61e967e428fadb2d4bb52dfed8a949b4a39cb461c2e3a8e6d207.exe	sc.exe
PID 924 wrote to memory of 1268	924	18643a9a6e4b61e967e428fadb2d4bb52dfed8a949b4a39cb461c2e3a8e6d207.exe	netsh.exe
PID 924 wrote to memory of 1268	924	18643a9a6e4b61e967e428fadb2d4bb52dfed8a949b4a39cb461c2e3a8e6d207.exe	netsh.exe
PID 924 wrote to memory of 1268	924	18643a9a6e4b61e967e428fadb2d4bb52dfed8a949b4a39cb461c2e3a8e6d207.exe	netsh.exe
PID 924 wrote to memory of 1268	924	18643a9a6e4b61e967e428fadb2d4bb52dfed8a949b4a39cb461c2e3a8e6d207.exe	netsh.exe
PID 976 wrote to memory of 692	976	oeapkcai.exe	svchost.exe
PID 976 wrote to memory of 692	976	oeapkcai.exe	svchost.exe
PID 976 wrote to memory of 692	976	oeapkcai.exe	svchost.exe
PID 976 wrote to memory of 692	976	oeapkcai.exe	svchost.exe
PID 976 wrote to memory of 692	976	oeapkcai.exe	svchost.exe
PID 976 wrote to memory of 692	976	oeapkcai.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\18643a9a6e4b61e967e428fadb2d4bb52dfed8a949b4a39cb461c2e3a8e6d207.exe
"C:\Users\Admin\AppData\Local\Temp\18643a9a6e4b61e967e428fadb2d4bb52dfed8a949b4a39cb461c2e3a8e6d207.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:924

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\tiutgkcm\
2⤵
PID:436

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\oeapkcai.exe" C:\Windows\SysWOW64\tiutgkcm\
2⤵
PID:1416

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create tiutgkcm binPath= "C:\Windows\SysWOW64\tiutgkcm\oeapkcai.exe /d\"C:\Users\Admin\AppData\Local\Temp\18643a9a6e4b61e967e428fadb2d4bb52dfed8a949b4a39cb461c2e3a8e6d207.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:1736

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description tiutgkcm "wifi internet conection"
2⤵
- Launches sc.exe
PID:1204

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start tiutgkcm
2⤵
- Launches sc.exe
PID:1108

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:1268

C:\Windows\SysWOW64\tiutgkcm\oeapkcai.exe
C:\Windows\SysWOW64\tiutgkcm\oeapkcai.exe /d"C:\Users\Admin\AppData\Local\Temp\18643a9a6e4b61e967e428fadb2d4bb52dfed8a949b4a39cb461c2e3a8e6d207.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:976

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
- Deletes itself
PID:692

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

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\oeapkcai.exe
Filesize
10.6MB

MD5
feca19f5412e401aed16f6594cb40dc4

SHA1
73ff2105ca4cc9531a364b24ba4874ba0638d076

SHA256
064fcc6308f7d12b308756a532ccedf54bcf1cb30928e3773fd30fed0d13b662

SHA512
6ef47a7562f67221141c0638842f7604f2a79c5afeef2a45fbb4c9b69098efb549542e7db199fc44fff9a93928db56f08812c36633fa4f74ef8431b4c8fa06e2

Download Submit
C:\Windows\SysWOW64\tiutgkcm\oeapkcai.exe
Filesize
10.6MB

MD5
feca19f5412e401aed16f6594cb40dc4

SHA1
73ff2105ca4cc9531a364b24ba4874ba0638d076

SHA256
064fcc6308f7d12b308756a532ccedf54bcf1cb30928e3773fd30fed0d13b662

SHA512
6ef47a7562f67221141c0638842f7604f2a79c5afeef2a45fbb4c9b69098efb549542e7db199fc44fff9a93928db56f08812c36633fa4f74ef8431b4c8fa06e2

Download Submit
memory/692-70-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/692-66-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/692-65-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/692-67-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/692-72-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/692-73-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/692-74-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/924-62-0x0000000000400000-0x0000000000A5C000-memory.dmp

Filesize
6.4MB

Download
memory/924-57-0x0000000000400000-0x0000000000A5C000-memory.dmp

Filesize
6.4MB

Download
memory/924-56-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/976-71-0x0000000000400000-0x0000000000A5C000-memory.dmp

Filesize
6.4MB

Download

Analysis

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