tofsee | 2e0a35235d3eaf1073af214c45b50f60639cd9e9050b990611302493caf666a5

General

Target

2e0a35235d3eaf1073af214c45b50f60639cd9e9050b990611302493caf666a5.exe
Size

137KB
MD5

2ccea0b6d24c740b88eb1ac98db1548f
SHA1

38fc1c6b54b9d0804340d99f9e0c14bd566c4dad
SHA256

2e0a35235d3eaf1073af214c45b50f60639cd9e9050b990611302493caf666a5
SHA512

a0b225e1835efd43fb69b2c429da8bef2a30a518ab59940e9d35bab45cc37c1d5817ede5f07b5995ceec2d0d292fb850d736003a8222a43c8214432addce5d0e

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

43.231.4.7

lazystax.ru

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\blbflvzz = "0"	svchost.exe

Creates new service(s) 1 TTPs
persistence

New Service
T1050
Executes dropped EXE 1 IoCs

Processes:

kxnwhuhb.exe

pid process

432 kxnwhuhb.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

508 netsh.exe

pid	process
432	kxnwhuhb.exe

pid	process
508	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\blbflvzz\ImagePath = "C:\\Windows\\SysWOW64\\blbflvzz\\kxnwhuhb.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

1296 svchost.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

kxnwhuhb.exe

description pid process target process

PID 432 set thread context of 1296 432 kxnwhuhb.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

952 sc.exe
240 sc.exe
664 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
1296	svchost.exe

description	pid	process	target process
PID 432 set thread context of 1296	432	kxnwhuhb.exe	svchost.exe

pid	process
952	sc.exe
240	sc.exe
664	sc.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

2e0a35235d3eaf1073af214c45b50f60639cd9e9050b990611302493caf666a5.exekxnwhuhb.exe

description	pid	process	target process
PID 2032 wrote to memory of 1724	2032	2e0a35235d3eaf1073af214c45b50f60639cd9e9050b990611302493caf666a5.exe	cmd.exe
PID 2032 wrote to memory of 1724	2032	2e0a35235d3eaf1073af214c45b50f60639cd9e9050b990611302493caf666a5.exe	cmd.exe
PID 2032 wrote to memory of 1724	2032	2e0a35235d3eaf1073af214c45b50f60639cd9e9050b990611302493caf666a5.exe	cmd.exe
PID 2032 wrote to memory of 1724	2032	2e0a35235d3eaf1073af214c45b50f60639cd9e9050b990611302493caf666a5.exe	cmd.exe
PID 2032 wrote to memory of 1536	2032	2e0a35235d3eaf1073af214c45b50f60639cd9e9050b990611302493caf666a5.exe	cmd.exe
PID 2032 wrote to memory of 1536	2032	2e0a35235d3eaf1073af214c45b50f60639cd9e9050b990611302493caf666a5.exe	cmd.exe
PID 2032 wrote to memory of 1536	2032	2e0a35235d3eaf1073af214c45b50f60639cd9e9050b990611302493caf666a5.exe	cmd.exe
PID 2032 wrote to memory of 1536	2032	2e0a35235d3eaf1073af214c45b50f60639cd9e9050b990611302493caf666a5.exe	cmd.exe
PID 2032 wrote to memory of 952	2032	2e0a35235d3eaf1073af214c45b50f60639cd9e9050b990611302493caf666a5.exe	sc.exe
PID 2032 wrote to memory of 952	2032	2e0a35235d3eaf1073af214c45b50f60639cd9e9050b990611302493caf666a5.exe	sc.exe
PID 2032 wrote to memory of 952	2032	2e0a35235d3eaf1073af214c45b50f60639cd9e9050b990611302493caf666a5.exe	sc.exe
PID 2032 wrote to memory of 952	2032	2e0a35235d3eaf1073af214c45b50f60639cd9e9050b990611302493caf666a5.exe	sc.exe
PID 2032 wrote to memory of 240	2032	2e0a35235d3eaf1073af214c45b50f60639cd9e9050b990611302493caf666a5.exe	sc.exe
PID 2032 wrote to memory of 240	2032	2e0a35235d3eaf1073af214c45b50f60639cd9e9050b990611302493caf666a5.exe	sc.exe
PID 2032 wrote to memory of 240	2032	2e0a35235d3eaf1073af214c45b50f60639cd9e9050b990611302493caf666a5.exe	sc.exe
PID 2032 wrote to memory of 240	2032	2e0a35235d3eaf1073af214c45b50f60639cd9e9050b990611302493caf666a5.exe	sc.exe
PID 2032 wrote to memory of 664	2032	2e0a35235d3eaf1073af214c45b50f60639cd9e9050b990611302493caf666a5.exe	sc.exe
PID 2032 wrote to memory of 664	2032	2e0a35235d3eaf1073af214c45b50f60639cd9e9050b990611302493caf666a5.exe	sc.exe
PID 2032 wrote to memory of 664	2032	2e0a35235d3eaf1073af214c45b50f60639cd9e9050b990611302493caf666a5.exe	sc.exe
PID 2032 wrote to memory of 664	2032	2e0a35235d3eaf1073af214c45b50f60639cd9e9050b990611302493caf666a5.exe	sc.exe
PID 2032 wrote to memory of 508	2032	2e0a35235d3eaf1073af214c45b50f60639cd9e9050b990611302493caf666a5.exe	netsh.exe
PID 2032 wrote to memory of 508	2032	2e0a35235d3eaf1073af214c45b50f60639cd9e9050b990611302493caf666a5.exe	netsh.exe
PID 2032 wrote to memory of 508	2032	2e0a35235d3eaf1073af214c45b50f60639cd9e9050b990611302493caf666a5.exe	netsh.exe
PID 2032 wrote to memory of 508	2032	2e0a35235d3eaf1073af214c45b50f60639cd9e9050b990611302493caf666a5.exe	netsh.exe
PID 432 wrote to memory of 1296	432	kxnwhuhb.exe	svchost.exe
PID 432 wrote to memory of 1296	432	kxnwhuhb.exe	svchost.exe
PID 432 wrote to memory of 1296	432	kxnwhuhb.exe	svchost.exe
PID 432 wrote to memory of 1296	432	kxnwhuhb.exe	svchost.exe
PID 432 wrote to memory of 1296	432	kxnwhuhb.exe	svchost.exe
PID 432 wrote to memory of 1296	432	kxnwhuhb.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\2e0a35235d3eaf1073af214c45b50f60639cd9e9050b990611302493caf666a5.exe
"C:\Users\Admin\AppData\Local\Temp\2e0a35235d3eaf1073af214c45b50f60639cd9e9050b990611302493caf666a5.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2032

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\blbflvzz\
2⤵
PID:1724

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\kxnwhuhb.exe" C:\Windows\SysWOW64\blbflvzz\
2⤵
PID:1536

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create blbflvzz binPath= "C:\Windows\SysWOW64\blbflvzz\kxnwhuhb.exe /d\"C:\Users\Admin\AppData\Local\Temp\2e0a35235d3eaf1073af214c45b50f60639cd9e9050b990611302493caf666a5.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:952

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description blbflvzz "wifi internet conection"
2⤵
- Launches sc.exe
PID:240

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start blbflvzz
2⤵
- Launches sc.exe
PID:664

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:508

C:\Windows\SysWOW64\blbflvzz\kxnwhuhb.exe
C:\Windows\SysWOW64\blbflvzz\kxnwhuhb.exe /d"C:\Users\Admin\AppData\Local\Temp\2e0a35235d3eaf1073af214c45b50f60639cd9e9050b990611302493caf666a5.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:432

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Windows security bypass
- Sets service image path in registry
- Deletes itself
PID:1296

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\kxnwhuhb.exe
Filesize
10.8MB

MD5
99638efde63cd875ac31aa8113db70a9

SHA1
a8d95f972b1d9027dfdd63d75c6e2e2f52d7efde

SHA256
e13bed5080ea30776923ad5395082d11dd1027277e7f7bd96fe043a75cd10da1

SHA512
0716b4d9c0be6201329b14939c06171325adf93ea784728dda808fd9a7cfe76a3e5155489c2f701714dc5d248fe5db401e1cef41b4dc6fb8717da01f2c1c3147

Download Submit
C:\Windows\SysWOW64\blbflvzz\kxnwhuhb.exe
Filesize
10.8MB

MD5
99638efde63cd875ac31aa8113db70a9

SHA1
a8d95f972b1d9027dfdd63d75c6e2e2f52d7efde

SHA256
e13bed5080ea30776923ad5395082d11dd1027277e7f7bd96fe043a75cd10da1

SHA512
0716b4d9c0be6201329b14939c06171325adf93ea784728dda808fd9a7cfe76a3e5155489c2f701714dc5d248fe5db401e1cef41b4dc6fb8717da01f2c1c3147

Download Submit
memory/240-60-0x0000000000000000-mapping.dmp

Download
memory/432-65-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/508-62-0x0000000000000000-mapping.dmp

Download
memory/664-61-0x0000000000000000-mapping.dmp

Download
memory/952-59-0x0000000000000000-mapping.dmp

Download
memory/1296-67-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1296-69-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1296-70-0x0000000000089A6B-mapping.dmp

Download
memory/1296-73-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1296-74-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1296-75-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1536-57-0x0000000000000000-mapping.dmp

Download
memory/1724-56-0x0000000000000000-mapping.dmp

Download
memory/2032-54-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/2032-55-0x00000000759F1000-0x00000000759F3000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads