tofsee | 2897e555be336cb52bf83da45ca4cf28ec455f06ad960bb41b1b08bfcc80d74b

General

Target

2897e555be336cb52bf83da45ca4cf28ec455f06ad960bb41b1b08bfcc80d74b.exe
Size

143KB
MD5

dd7f8116f16c8e53b2c25def6db171c9
SHA1

7490dc96c28d8ef777bfa834576a0121c14525cb
SHA256

2897e555be336cb52bf83da45ca4cf28ec455f06ad960bb41b1b08bfcc80d74b
SHA512

6b45456f69753baf62834984ccc9ac2a48c7878e22ef805c93263463d6e73caffcde34aa338a655925d490a4c62395124e2a208ff288e7fd9ec2b28e2511a88f

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\mxgnlgb = "0"	svchost.exe

Creates new service(s) 1 TTPs
persistence

New Service
T1050
Executes dropped EXE 1 IoCs

Processes:

nkvhbcg.exe

pid process

892 nkvhbcg.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

2020 netsh.exe

pid	process
892	nkvhbcg.exe

pid	process
2020	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\mxgnlgb\ImagePath = "C:\\Windows\\SysWOW64\\mxgnlgb\\nkvhbcg.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

1060 svchost.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

nkvhbcg.exe

description pid process target process

PID 892 set thread context of 1060 892 nkvhbcg.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

1336 sc.exe
1708 sc.exe
740 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
1060	svchost.exe

description	pid	process	target process
PID 892 set thread context of 1060	892	nkvhbcg.exe	svchost.exe

pid	process
1336	sc.exe
1708	sc.exe
740	sc.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

2897e555be336cb52bf83da45ca4cf28ec455f06ad960bb41b1b08bfcc80d74b.exenkvhbcg.exe

description	pid	process	target process
PID 1796 wrote to memory of 1956	1796	2897e555be336cb52bf83da45ca4cf28ec455f06ad960bb41b1b08bfcc80d74b.exe	cmd.exe
PID 1796 wrote to memory of 1956	1796	2897e555be336cb52bf83da45ca4cf28ec455f06ad960bb41b1b08bfcc80d74b.exe	cmd.exe
PID 1796 wrote to memory of 1956	1796	2897e555be336cb52bf83da45ca4cf28ec455f06ad960bb41b1b08bfcc80d74b.exe	cmd.exe
PID 1796 wrote to memory of 1956	1796	2897e555be336cb52bf83da45ca4cf28ec455f06ad960bb41b1b08bfcc80d74b.exe	cmd.exe
PID 1796 wrote to memory of 1352	1796	2897e555be336cb52bf83da45ca4cf28ec455f06ad960bb41b1b08bfcc80d74b.exe	cmd.exe
PID 1796 wrote to memory of 1352	1796	2897e555be336cb52bf83da45ca4cf28ec455f06ad960bb41b1b08bfcc80d74b.exe	cmd.exe
PID 1796 wrote to memory of 1352	1796	2897e555be336cb52bf83da45ca4cf28ec455f06ad960bb41b1b08bfcc80d74b.exe	cmd.exe
PID 1796 wrote to memory of 1352	1796	2897e555be336cb52bf83da45ca4cf28ec455f06ad960bb41b1b08bfcc80d74b.exe	cmd.exe
PID 1796 wrote to memory of 1336	1796	2897e555be336cb52bf83da45ca4cf28ec455f06ad960bb41b1b08bfcc80d74b.exe	sc.exe
PID 1796 wrote to memory of 1336	1796	2897e555be336cb52bf83da45ca4cf28ec455f06ad960bb41b1b08bfcc80d74b.exe	sc.exe
PID 1796 wrote to memory of 1336	1796	2897e555be336cb52bf83da45ca4cf28ec455f06ad960bb41b1b08bfcc80d74b.exe	sc.exe
PID 1796 wrote to memory of 1336	1796	2897e555be336cb52bf83da45ca4cf28ec455f06ad960bb41b1b08bfcc80d74b.exe	sc.exe
PID 1796 wrote to memory of 1708	1796	2897e555be336cb52bf83da45ca4cf28ec455f06ad960bb41b1b08bfcc80d74b.exe	sc.exe
PID 1796 wrote to memory of 1708	1796	2897e555be336cb52bf83da45ca4cf28ec455f06ad960bb41b1b08bfcc80d74b.exe	sc.exe
PID 1796 wrote to memory of 1708	1796	2897e555be336cb52bf83da45ca4cf28ec455f06ad960bb41b1b08bfcc80d74b.exe	sc.exe
PID 1796 wrote to memory of 1708	1796	2897e555be336cb52bf83da45ca4cf28ec455f06ad960bb41b1b08bfcc80d74b.exe	sc.exe
PID 1796 wrote to memory of 740	1796	2897e555be336cb52bf83da45ca4cf28ec455f06ad960bb41b1b08bfcc80d74b.exe	sc.exe
PID 1796 wrote to memory of 740	1796	2897e555be336cb52bf83da45ca4cf28ec455f06ad960bb41b1b08bfcc80d74b.exe	sc.exe
PID 1796 wrote to memory of 740	1796	2897e555be336cb52bf83da45ca4cf28ec455f06ad960bb41b1b08bfcc80d74b.exe	sc.exe
PID 1796 wrote to memory of 740	1796	2897e555be336cb52bf83da45ca4cf28ec455f06ad960bb41b1b08bfcc80d74b.exe	sc.exe
PID 1796 wrote to memory of 2020	1796	2897e555be336cb52bf83da45ca4cf28ec455f06ad960bb41b1b08bfcc80d74b.exe	netsh.exe
PID 1796 wrote to memory of 2020	1796	2897e555be336cb52bf83da45ca4cf28ec455f06ad960bb41b1b08bfcc80d74b.exe	netsh.exe
PID 1796 wrote to memory of 2020	1796	2897e555be336cb52bf83da45ca4cf28ec455f06ad960bb41b1b08bfcc80d74b.exe	netsh.exe
PID 1796 wrote to memory of 2020	1796	2897e555be336cb52bf83da45ca4cf28ec455f06ad960bb41b1b08bfcc80d74b.exe	netsh.exe
PID 892 wrote to memory of 1060	892	nkvhbcg.exe	svchost.exe
PID 892 wrote to memory of 1060	892	nkvhbcg.exe	svchost.exe
PID 892 wrote to memory of 1060	892	nkvhbcg.exe	svchost.exe
PID 892 wrote to memory of 1060	892	nkvhbcg.exe	svchost.exe
PID 892 wrote to memory of 1060	892	nkvhbcg.exe	svchost.exe
PID 892 wrote to memory of 1060	892	nkvhbcg.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\2897e555be336cb52bf83da45ca4cf28ec455f06ad960bb41b1b08bfcc80d74b.exe
"C:\Users\Admin\AppData\Local\Temp\2897e555be336cb52bf83da45ca4cf28ec455f06ad960bb41b1b08bfcc80d74b.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1796

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\mxgnlgb\
2⤵
PID:1956

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\nkvhbcg.exe" C:\Windows\SysWOW64\mxgnlgb\
2⤵
PID:1352

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create mxgnlgb binPath= "C:\Windows\SysWOW64\mxgnlgb\nkvhbcg.exe /d\"C:\Users\Admin\AppData\Local\Temp\2897e555be336cb52bf83da45ca4cf28ec455f06ad960bb41b1b08bfcc80d74b.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:1336

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description mxgnlgb "wifi internet conection"
2⤵
- Launches sc.exe
PID:1708

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start mxgnlgb
2⤵
- Launches sc.exe
PID:740

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:2020

C:\Windows\SysWOW64\mxgnlgb\nkvhbcg.exe
C:\Windows\SysWOW64\mxgnlgb\nkvhbcg.exe /d"C:\Users\Admin\AppData\Local\Temp\2897e555be336cb52bf83da45ca4cf28ec455f06ad960bb41b1b08bfcc80d74b.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:892

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Windows security bypass
- Sets service image path in registry
- Deletes itself
PID:1060

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\nkvhbcg.exe
Filesize
11.6MB

MD5
980e8f4b0ffe211c8aeb3cd8e135a50d

SHA1
7e68ba177dce5cd62344f8c59e925ef7d8fb386e

SHA256
6b2c4aa925f5282796912e5bbef047e040379fa48a8d5af705e162bca916590c

SHA512
d595c80d8902b41877a43cc2f1fb351d4c048e72380c2f6c2ead978c61e59601d69c82dc2148287d45dba34108951365ced734944d86b8b28d4be06bbc571385

Download Submit
C:\Windows\SysWOW64\mxgnlgb\nkvhbcg.exe
Filesize
11.6MB

MD5
980e8f4b0ffe211c8aeb3cd8e135a50d

SHA1
7e68ba177dce5cd62344f8c59e925ef7d8fb386e

SHA256
6b2c4aa925f5282796912e5bbef047e040379fa48a8d5af705e162bca916590c

SHA512
d595c80d8902b41877a43cc2f1fb351d4c048e72380c2f6c2ead978c61e59601d69c82dc2148287d45dba34108951365ced734944d86b8b28d4be06bbc571385

Download Submit
memory/740-61-0x0000000000000000-mapping.dmp

Download
memory/892-65-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1060-69-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1060-67-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1060-70-0x0000000000089A6B-mapping.dmp

Download
memory/1060-73-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1060-74-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1060-75-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1336-59-0x0000000000000000-mapping.dmp

Download
memory/1352-57-0x0000000000000000-mapping.dmp

Download
memory/1708-60-0x0000000000000000-mapping.dmp

Download
memory/1796-55-0x0000000075951000-0x0000000075953000-memory.dmp

Filesize
8KB

Download
memory/1796-54-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1956-56-0x0000000000000000-mapping.dmp

Download
memory/2020-62-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads