tofsee | 3f6038c5aaf6de7bfb3361774f3fade01c05435542fccb445314287e2a252d19

General

Target

bd650f0d1cdae90e4a008e0ad214fdb8d16a549a5463d06d25d284c019b7657b.exe
Size

147KB
MD5

1b8099400f9b3df55bb4b9a6b4e0b849
SHA1

9f737eeb8a5b084511a4b655cb5ace0413d2ed8b
SHA256

bd650f0d1cdae90e4a008e0ad214fdb8d16a549a5463d06d25d284c019b7657b
SHA512

da97e8411dc9cc7427906a427a3cd36bfcba2e6881c54764234588d6e1371339753469ddba9635366c51b58eb0314fe76235e96db011d59274cd6ca03bea9193
SSDEEP

3072:rsL7PaCvJSVUn5fOkOVCvvj8n/NTWYtWmxP88xq9:gWCvJSVgOktHjufWm1E

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
Creates new service(s) 1 TTPs
persistence

New Service
T1050
Executes dropped EXE 1 IoCs

Processes:

firccyyv.exe

pid process

1048 firccyyv.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

1784 netsh.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

firccyyv.exe

description pid process target process

PID 1048 set thread context of 1864 1048 firccyyv.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

528 sc.exe
2004 sc.exe
776 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
1048	firccyyv.exe

pid	process
1784	netsh.exe

description	pid	process	target process
PID 1048 set thread context of 1864	1048	firccyyv.exe	svchost.exe

pid	process
528	sc.exe
2004	sc.exe
776	sc.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

bd650f0d1cdae90e4a008e0ad214fdb8d16a549a5463d06d25d284c019b7657b.exefirccyyv.exe

description	pid	process	target process
PID 748 wrote to memory of 940	748	bd650f0d1cdae90e4a008e0ad214fdb8d16a549a5463d06d25d284c019b7657b.exe	cmd.exe
PID 748 wrote to memory of 940	748	bd650f0d1cdae90e4a008e0ad214fdb8d16a549a5463d06d25d284c019b7657b.exe	cmd.exe
PID 748 wrote to memory of 940	748	bd650f0d1cdae90e4a008e0ad214fdb8d16a549a5463d06d25d284c019b7657b.exe	cmd.exe
PID 748 wrote to memory of 940	748	bd650f0d1cdae90e4a008e0ad214fdb8d16a549a5463d06d25d284c019b7657b.exe	cmd.exe
PID 748 wrote to memory of 1792	748	bd650f0d1cdae90e4a008e0ad214fdb8d16a549a5463d06d25d284c019b7657b.exe	cmd.exe
PID 748 wrote to memory of 1792	748	bd650f0d1cdae90e4a008e0ad214fdb8d16a549a5463d06d25d284c019b7657b.exe	cmd.exe
PID 748 wrote to memory of 1792	748	bd650f0d1cdae90e4a008e0ad214fdb8d16a549a5463d06d25d284c019b7657b.exe	cmd.exe
PID 748 wrote to memory of 1792	748	bd650f0d1cdae90e4a008e0ad214fdb8d16a549a5463d06d25d284c019b7657b.exe	cmd.exe
PID 748 wrote to memory of 2004	748	bd650f0d1cdae90e4a008e0ad214fdb8d16a549a5463d06d25d284c019b7657b.exe	sc.exe
PID 748 wrote to memory of 2004	748	bd650f0d1cdae90e4a008e0ad214fdb8d16a549a5463d06d25d284c019b7657b.exe	sc.exe
PID 748 wrote to memory of 2004	748	bd650f0d1cdae90e4a008e0ad214fdb8d16a549a5463d06d25d284c019b7657b.exe	sc.exe
PID 748 wrote to memory of 2004	748	bd650f0d1cdae90e4a008e0ad214fdb8d16a549a5463d06d25d284c019b7657b.exe	sc.exe
PID 748 wrote to memory of 776	748	bd650f0d1cdae90e4a008e0ad214fdb8d16a549a5463d06d25d284c019b7657b.exe	sc.exe
PID 748 wrote to memory of 776	748	bd650f0d1cdae90e4a008e0ad214fdb8d16a549a5463d06d25d284c019b7657b.exe	sc.exe
PID 748 wrote to memory of 776	748	bd650f0d1cdae90e4a008e0ad214fdb8d16a549a5463d06d25d284c019b7657b.exe	sc.exe
PID 748 wrote to memory of 776	748	bd650f0d1cdae90e4a008e0ad214fdb8d16a549a5463d06d25d284c019b7657b.exe	sc.exe
PID 748 wrote to memory of 528	748	bd650f0d1cdae90e4a008e0ad214fdb8d16a549a5463d06d25d284c019b7657b.exe	sc.exe
PID 748 wrote to memory of 528	748	bd650f0d1cdae90e4a008e0ad214fdb8d16a549a5463d06d25d284c019b7657b.exe	sc.exe
PID 748 wrote to memory of 528	748	bd650f0d1cdae90e4a008e0ad214fdb8d16a549a5463d06d25d284c019b7657b.exe	sc.exe
PID 748 wrote to memory of 528	748	bd650f0d1cdae90e4a008e0ad214fdb8d16a549a5463d06d25d284c019b7657b.exe	sc.exe
PID 748 wrote to memory of 1784	748	bd650f0d1cdae90e4a008e0ad214fdb8d16a549a5463d06d25d284c019b7657b.exe	netsh.exe
PID 748 wrote to memory of 1784	748	bd650f0d1cdae90e4a008e0ad214fdb8d16a549a5463d06d25d284c019b7657b.exe	netsh.exe
PID 748 wrote to memory of 1784	748	bd650f0d1cdae90e4a008e0ad214fdb8d16a549a5463d06d25d284c019b7657b.exe	netsh.exe
PID 748 wrote to memory of 1784	748	bd650f0d1cdae90e4a008e0ad214fdb8d16a549a5463d06d25d284c019b7657b.exe	netsh.exe
PID 1048 wrote to memory of 1864	1048	firccyyv.exe	svchost.exe
PID 1048 wrote to memory of 1864	1048	firccyyv.exe	svchost.exe
PID 1048 wrote to memory of 1864	1048	firccyyv.exe	svchost.exe
PID 1048 wrote to memory of 1864	1048	firccyyv.exe	svchost.exe
PID 1048 wrote to memory of 1864	1048	firccyyv.exe	svchost.exe
PID 1048 wrote to memory of 1864	1048	firccyyv.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\bd650f0d1cdae90e4a008e0ad214fdb8d16a549a5463d06d25d284c019b7657b.exe
"C:\Users\Admin\AppData\Local\Temp\bd650f0d1cdae90e4a008e0ad214fdb8d16a549a5463d06d25d284c019b7657b.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:748

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\urymciej\
2⤵
PID:940

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\firccyyv.exe" C:\Windows\SysWOW64\urymciej\
2⤵
PID:1792

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create urymciej binPath= "C:\Windows\SysWOW64\urymciej\firccyyv.exe /d\"C:\Users\Admin\AppData\Local\Temp\bd650f0d1cdae90e4a008e0ad214fdb8d16a549a5463d06d25d284c019b7657b.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:2004

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description urymciej "wifi internet conection"
2⤵
- Launches sc.exe
PID:776

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start urymciej
2⤵
- Launches sc.exe
PID:528

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:1784

C:\Windows\SysWOW64\urymciej\firccyyv.exe
C:\Windows\SysWOW64\urymciej\firccyyv.exe /d"C:\Users\Admin\AppData\Local\Temp\bd650f0d1cdae90e4a008e0ad214fdb8d16a549a5463d06d25d284c019b7657b.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1048

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
PID:1864

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

New Service

1

T1050

Modify Existing Service

1

T1031

Privilege Escalation

New Service

1

T1050

Defense Evasion

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\firccyyv.exe
Filesize
10.9MB

MD5
f34d611cd063b495385e2dfd67f21f2c

SHA1
a1ea4fc231285fe31c275b1f37a8f91e12b5f25e

SHA256
44642cf840ef991e8843e81f0a109af7c08a1cd78843878bb1ed7a7ea9fc4fb4

SHA512
8149be18c68017833dbdad56a19e0e0cae3a953d6691f9fe071d0809041bb3e780a6e9747cc8d3958843050aae2ec45fb4c06335ddd6e87d9f65dd66f61379cf

Download Submit
C:\Windows\SysWOW64\urymciej\firccyyv.exe
Filesize
10.9MB

MD5
f34d611cd063b495385e2dfd67f21f2c

SHA1
a1ea4fc231285fe31c275b1f37a8f91e12b5f25e

SHA256
44642cf840ef991e8843e81f0a109af7c08a1cd78843878bb1ed7a7ea9fc4fb4

SHA512
8149be18c68017833dbdad56a19e0e0cae3a953d6691f9fe071d0809041bb3e780a6e9747cc8d3958843050aae2ec45fb4c06335ddd6e87d9f65dd66f61379cf

Download Submit
memory/528-63-0x0000000000000000-mapping.dmp

Download
memory/748-58-0x0000000000400000-0x0000000000AD6000-memory.dmp

Filesize
6.8MB

Download
memory/748-54-0x0000000074FB1000-0x0000000074FB3000-memory.dmp

Filesize
8KB

Download
memory/748-56-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/748-66-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/748-65-0x0000000000CCB000-0x0000000000CDC000-memory.dmp

Filesize
68KB

Download
memory/748-67-0x0000000000400000-0x0000000000AD6000-memory.dmp

Filesize
6.8MB

Download
memory/748-55-0x0000000000CCB000-0x0000000000CDC000-memory.dmp

Filesize
68KB

Download
memory/776-62-0x0000000000000000-mapping.dmp

Download
memory/940-57-0x0000000000000000-mapping.dmp

Download
memory/1048-78-0x0000000000400000-0x0000000000AD6000-memory.dmp

Filesize
6.8MB

Download
memory/1048-74-0x0000000000C6B000-0x0000000000C7C000-memory.dmp

Filesize
68KB

Download
memory/1784-64-0x0000000000000000-mapping.dmp

Download
memory/1792-59-0x0000000000000000-mapping.dmp

Download
memory/1864-72-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1864-73-0x0000000000089A6B-mapping.dmp

Download
memory/1864-70-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2004-61-0x0000000000000000-mapping.dmp

Download

Analysis

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