tofsee | 2603757f92034678ded0d4e72bbb78f2b29d6f7ee8f809b02d6056750fa579e4

General

Target

00f168270e8ebf2584f151d7cc7236da.exe
Size

11.7MB
MD5

00f168270e8ebf2584f151d7cc7236da
SHA1

527dac58289ec820691048cb320d65c01c193e65
SHA256

2603757f92034678ded0d4e72bbb78f2b29d6f7ee8f809b02d6056750fa579e4
SHA512

184b6b12d02c673dcc6d6c4f478fba8f8a5fd036fc94118ecbd490ef2735d7dd8aeee8132932e3ea43d5a45a02823d3c473a713037a4fd9c871723db6e350837

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee
Windows security bypass 2 TTPs
evasion trojan

Disabling Security Tools
T1089

Modify Registry
T1112
Creates new service(s) 1 TTPs
persistence

New Service
T1050
Executes dropped EXE 1 IoCs

Processes:

dcsovrw.exe

pid process

4092 dcsovrw.exe
Modifies Windows Firewall 1 TTPs
evasion

Modify Existing Service
T1031
Sets service image path in registry 2 TTPs
persistence

Registry Run Keys / Startup Folder
T1060

Modify Registry
T1112
Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

4068 svchost.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

dcsovrw.exe

description pid process target process

PID 4092 set thread context of 4068 4092 dcsovrw.exe svchost.exe
Launches sc.exe
Sc.exe is a Windows utlilty to control services on the system.

pid	process
4092	dcsovrw.exe

pid	process
4068	svchost.exe

description	pid	process	target process
PID 4092 set thread context of 4068	4092	dcsovrw.exe	svchost.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

00f168270e8ebf2584f151d7cc7236da.exedcsovrw.exe

description	pid	process	target process
PID 4712 wrote to memory of 1720	4712	00f168270e8ebf2584f151d7cc7236da.exe	cmd.exe
PID 4712 wrote to memory of 1720	4712	00f168270e8ebf2584f151d7cc7236da.exe	cmd.exe
PID 4712 wrote to memory of 1720	4712	00f168270e8ebf2584f151d7cc7236da.exe	cmd.exe
PID 4712 wrote to memory of 504	4712	00f168270e8ebf2584f151d7cc7236da.exe	cmd.exe
PID 4712 wrote to memory of 504	4712	00f168270e8ebf2584f151d7cc7236da.exe	cmd.exe
PID 4712 wrote to memory of 504	4712	00f168270e8ebf2584f151d7cc7236da.exe	cmd.exe
PID 4712 wrote to memory of 4180	4712	00f168270e8ebf2584f151d7cc7236da.exe	sc.exe
PID 4712 wrote to memory of 4180	4712	00f168270e8ebf2584f151d7cc7236da.exe	sc.exe
PID 4712 wrote to memory of 4180	4712	00f168270e8ebf2584f151d7cc7236da.exe	sc.exe
PID 4712 wrote to memory of 3828	4712	00f168270e8ebf2584f151d7cc7236da.exe	sc.exe
PID 4712 wrote to memory of 3828	4712	00f168270e8ebf2584f151d7cc7236da.exe	sc.exe
PID 4712 wrote to memory of 3828	4712	00f168270e8ebf2584f151d7cc7236da.exe	sc.exe
PID 4712 wrote to memory of 2136	4712	00f168270e8ebf2584f151d7cc7236da.exe	sc.exe
PID 4712 wrote to memory of 2136	4712	00f168270e8ebf2584f151d7cc7236da.exe	sc.exe
PID 4712 wrote to memory of 2136	4712	00f168270e8ebf2584f151d7cc7236da.exe	sc.exe
PID 4092 wrote to memory of 4068	4092	dcsovrw.exe	svchost.exe
PID 4092 wrote to memory of 4068	4092	dcsovrw.exe	svchost.exe
PID 4092 wrote to memory of 4068	4092	dcsovrw.exe	svchost.exe
PID 4092 wrote to memory of 4068	4092	dcsovrw.exe	svchost.exe
PID 4092 wrote to memory of 4068	4092	dcsovrw.exe	svchost.exe
PID 4712 wrote to memory of 3104	4712	00f168270e8ebf2584f151d7cc7236da.exe	netsh.exe
PID 4712 wrote to memory of 3104	4712	00f168270e8ebf2584f151d7cc7236da.exe	netsh.exe
PID 4712 wrote to memory of 3104	4712	00f168270e8ebf2584f151d7cc7236da.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\00f168270e8ebf2584f151d7cc7236da.exe
"C:\Users\Admin\AppData\Local\Temp\00f168270e8ebf2584f151d7cc7236da.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4712

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\bprlvgpv\
2⤵
PID:1720

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\dcsovrw.exe" C:\Windows\SysWOW64\bprlvgpv\
2⤵
PID:504

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create bprlvgpv binPath= "C:\Windows\SysWOW64\bprlvgpv\dcsovrw.exe /d\"C:\Users\Admin\AppData\Local\Temp\00f168270e8ebf2584f151d7cc7236da.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
PID:4180

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description bprlvgpv "wifi internet conection"
2⤵
PID:3828

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start bprlvgpv
2⤵
PID:2136

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⤵
PID:3104

C:\Windows\SysWOW64\bprlvgpv\dcsovrw.exe
C:\Windows\SysWOW64\bprlvgpv\dcsovrw.exe /d"C:\Users\Admin\AppData\Local\Temp\00f168270e8ebf2584f151d7cc7236da.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4092

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Deletes itself
PID:4068

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

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\dcsovrw.exe
MD5
2749c9ef723b4a160984319e90c390f8

SHA1
b9228326cbde7819685ff7c3edf2cc47e32982e5

SHA256
26affe22fd763660c23b01beefa97aaaa7607937c39ae86d12f10bf6f215064e

SHA512
89f38ab97d2079ce961b9178c156cfaeaf52732e88b7067ab564a34ce32a1a18db3588a4fe83351afd54192c9b6f77cfa8f3312119d9befb1830383b5d40e25c

Download Submit
C:\Windows\SysWOW64\bprlvgpv\dcsovrw.exe
MD5
2749c9ef723b4a160984319e90c390f8

SHA1
b9228326cbde7819685ff7c3edf2cc47e32982e5

SHA256
26affe22fd763660c23b01beefa97aaaa7607937c39ae86d12f10bf6f215064e

SHA512
89f38ab97d2079ce961b9178c156cfaeaf52732e88b7067ab564a34ce32a1a18db3588a4fe83351afd54192c9b6f77cfa8f3312119d9befb1830383b5d40e25c

Download Submit
memory/504-3-0x0000000000000000-mapping.dmp

Download
memory/1720-2-0x0000000000000000-mapping.dmp

Download
memory/2136-7-0x0000000000000000-mapping.dmp

Download
memory/3104-12-0x0000000000000000-mapping.dmp

Download
memory/3828-6-0x0000000000000000-mapping.dmp

Download
memory/4068-9-0x00000000009B0000-0x00000000009C5000-memory.dmp

Filesize
84KB

Download
memory/4068-10-0x00000000009B9A6B-mapping.dmp

Download
memory/4180-5-0x0000000000000000-mapping.dmp

Download

Analysis

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