tofsee | 83f46bbf5414ef3e3eba95cbabf5b48802e01a426e14d4ebe51e6a6b6c67a574

General

Target

aff9ab5bd7309235fdfc643d535f89da.exe
Size

15.0MB
MD5

aff9ab5bd7309235fdfc643d535f89da
SHA1

7cbf21edc211abbf977f2ed01e317166e00c84ab
SHA256

83f46bbf5414ef3e3eba95cbabf5b48802e01a426e14d4ebe51e6a6b6c67a574
SHA512

0839288097ed86580fae041b59ac51aceac24e22ba5aef9bd50865de2dc2d897608dde150c4a6cc240bb9cab16a49b1c36d84bde9d07b761b3251878d7ca4cd2

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:

jiwymjkc.exe

pid process

1092 jiwymjkc.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

1588 svchost.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

jiwymjkc.exe

description pid process target process

PID 1092 set thread context of 1588 1092 jiwymjkc.exe svchost.exe
Launches sc.exe
Sc.exe is a Windows utlilty to control services on the system.

pid	process
1092	jiwymjkc.exe

pid	process
1588	svchost.exe

description	pid	process	target process
PID 1092 set thread context of 1588	1092	jiwymjkc.exe	svchost.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

aff9ab5bd7309235fdfc643d535f89da.exejiwymjkc.exe

description	pid	process	target process
PID 1036 wrote to memory of 1768	1036	aff9ab5bd7309235fdfc643d535f89da.exe	cmd.exe
PID 1036 wrote to memory of 1768	1036	aff9ab5bd7309235fdfc643d535f89da.exe	cmd.exe
PID 1036 wrote to memory of 1768	1036	aff9ab5bd7309235fdfc643d535f89da.exe	cmd.exe
PID 1036 wrote to memory of 1768	1036	aff9ab5bd7309235fdfc643d535f89da.exe	cmd.exe
PID 1036 wrote to memory of 1668	1036	aff9ab5bd7309235fdfc643d535f89da.exe	cmd.exe
PID 1036 wrote to memory of 1668	1036	aff9ab5bd7309235fdfc643d535f89da.exe	cmd.exe
PID 1036 wrote to memory of 1668	1036	aff9ab5bd7309235fdfc643d535f89da.exe	cmd.exe
PID 1036 wrote to memory of 1668	1036	aff9ab5bd7309235fdfc643d535f89da.exe	cmd.exe
PID 1036 wrote to memory of 1516	1036	aff9ab5bd7309235fdfc643d535f89da.exe	sc.exe
PID 1036 wrote to memory of 1516	1036	aff9ab5bd7309235fdfc643d535f89da.exe	sc.exe
PID 1036 wrote to memory of 1516	1036	aff9ab5bd7309235fdfc643d535f89da.exe	sc.exe
PID 1036 wrote to memory of 1516	1036	aff9ab5bd7309235fdfc643d535f89da.exe	sc.exe
PID 1036 wrote to memory of 748	1036	aff9ab5bd7309235fdfc643d535f89da.exe	sc.exe
PID 1036 wrote to memory of 748	1036	aff9ab5bd7309235fdfc643d535f89da.exe	sc.exe
PID 1036 wrote to memory of 748	1036	aff9ab5bd7309235fdfc643d535f89da.exe	sc.exe
PID 1036 wrote to memory of 748	1036	aff9ab5bd7309235fdfc643d535f89da.exe	sc.exe
PID 1036 wrote to memory of 864	1036	aff9ab5bd7309235fdfc643d535f89da.exe	sc.exe
PID 1036 wrote to memory of 864	1036	aff9ab5bd7309235fdfc643d535f89da.exe	sc.exe
PID 1036 wrote to memory of 864	1036	aff9ab5bd7309235fdfc643d535f89da.exe	sc.exe
PID 1036 wrote to memory of 864	1036	aff9ab5bd7309235fdfc643d535f89da.exe	sc.exe
PID 1036 wrote to memory of 932	1036	aff9ab5bd7309235fdfc643d535f89da.exe	netsh.exe
PID 1036 wrote to memory of 932	1036	aff9ab5bd7309235fdfc643d535f89da.exe	netsh.exe
PID 1036 wrote to memory of 932	1036	aff9ab5bd7309235fdfc643d535f89da.exe	netsh.exe
PID 1036 wrote to memory of 932	1036	aff9ab5bd7309235fdfc643d535f89da.exe	netsh.exe
PID 1092 wrote to memory of 1588	1092	jiwymjkc.exe	svchost.exe
PID 1092 wrote to memory of 1588	1092	jiwymjkc.exe	svchost.exe
PID 1092 wrote to memory of 1588	1092	jiwymjkc.exe	svchost.exe
PID 1092 wrote to memory of 1588	1092	jiwymjkc.exe	svchost.exe
PID 1092 wrote to memory of 1588	1092	jiwymjkc.exe	svchost.exe
PID 1092 wrote to memory of 1588	1092	jiwymjkc.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\aff9ab5bd7309235fdfc643d535f89da.exe
"C:\Users\Admin\AppData\Local\Temp\aff9ab5bd7309235fdfc643d535f89da.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1036

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\jnjmaugx\
2⤵
PID:1768

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\jiwymjkc.exe" C:\Windows\SysWOW64\jnjmaugx\
2⤵
PID:1668

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create jnjmaugx binPath= "C:\Windows\SysWOW64\jnjmaugx\jiwymjkc.exe /d\"C:\Users\Admin\AppData\Local\Temp\aff9ab5bd7309235fdfc643d535f89da.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
PID:1516

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description jnjmaugx "wifi internet conection"
2⤵
PID:748

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start jnjmaugx
2⤵
PID:864

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:932

C:\Windows\SysWOW64\jnjmaugx\jiwymjkc.exe
C:\Windows\SysWOW64\jnjmaugx\jiwymjkc.exe /d"C:\Users\Admin\AppData\Local\Temp\aff9ab5bd7309235fdfc643d535f89da.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1092

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Deletes itself
PID:1588

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\jiwymjkc.exe
MD5
51788a91f00c75ab2005ea4ae8861fee

SHA1
08d78c98b544ed972b870c589c2e1b03f13ed3cd

SHA256
5e5b8d6729d3e0d8227f5543f389431740b0dfb9265527952b870a9aece71b1f

SHA512
ab3679d8a3071f2438289f705b6b2d9a75bbb216ea28f1208e88ea075537e755c40414f925ce3b355b041698f77d6725126d3548ef4dfec3a860572e20b02135

Download Submit
C:\Windows\SysWOW64\jnjmaugx\jiwymjkc.exe
MD5
51788a91f00c75ab2005ea4ae8861fee

SHA1
08d78c98b544ed972b870c589c2e1b03f13ed3cd

SHA256
5e5b8d6729d3e0d8227f5543f389431740b0dfb9265527952b870a9aece71b1f

SHA512
ab3679d8a3071f2438289f705b6b2d9a75bbb216ea28f1208e88ea075537e755c40414f925ce3b355b041698f77d6725126d3548ef4dfec3a860572e20b02135

Download Submit
memory/748-8-0x0000000000000000-mapping.dmp

Download
memory/864-9-0x0000000000000000-mapping.dmp

Download
memory/932-11-0x0000000000000000-mapping.dmp

Download
memory/1036-3-0x0000000003C80000-0x0000000003C91000-memory.dmp

Filesize
68KB

Download
memory/1036-2-0x000000000245D000-0x000000000245E000-memory.dmp

Filesize
4KB

Download
memory/1092-12-0x00000000023DF000-0x00000000023E0000-memory.dmp

Filesize
4KB

Download
memory/1092-13-0x00000000029E0000-0x00000000029F1000-memory.dmp

Filesize
68KB

Download
memory/1516-7-0x0000000000000000-mapping.dmp

Download
memory/1588-14-0x00000000000D0000-0x00000000000E5000-memory.dmp

Filesize
84KB

Download
memory/1588-15-0x00000000000D9A6B-mapping.dmp

Download
memory/1668-5-0x0000000000000000-mapping.dmp

Download
memory/1768-4-0x0000000000000000-mapping.dmp

Download

Analysis

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