tofsee | d080665a2e670ebca96d72f5766911321583b00cb822dabc4d7a5da13e5c04e4

General

Target

53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exe
Size

292KB
MD5

4e39579f1251ae570e145e352e7393f7
SHA1

07497b310187f77e2c18364c7a0e31068be822d1
SHA256

53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462
SHA512

29dd728463e77e3988a074a97b36ebba3f0876e684ea96746b3ec0aeaf78e4ee25182b34a51900b6400fd8a22ea9a911bb15ae195bd04419f8303b9412920009
SSDEEP

3072:Xk6e+HiNFjbrieXWP72/BRczZpgAhtBE3k2Bxz+4a2GMW/ft/Dr05xK:7zkjbrFi78BkpgKC3z2YK

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

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\ltywuewf = "0"	svchost.exe

Creates new service(s) 1 TTPs
persistence

New Service
T1050
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

1464 netsh.exe

pid	process
1464	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\ltywuewf\ImagePath = "C:\\Windows\\SysWOW64\\ltywuewf\\dkjweemq.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

936 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

dkjweemq.exe

pid process

928 dkjweemq.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

dkjweemq.exe

description pid process target process

PID 928 set thread context of 936 928 dkjweemq.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

1476 sc.exe
332 sc.exe
1748 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
936	svchost.exe

pid	process
928	dkjweemq.exe

description	pid	process	target process
PID 928 set thread context of 936	928	dkjweemq.exe	svchost.exe

pid	process
1476	sc.exe
332	sc.exe
1748	sc.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exedkjweemq.exe

description	pid	process	target process
PID 1524 wrote to memory of 868	1524	53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exe	cmd.exe
PID 1524 wrote to memory of 868	1524	53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exe	cmd.exe
PID 1524 wrote to memory of 868	1524	53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exe	cmd.exe
PID 1524 wrote to memory of 868	1524	53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exe	cmd.exe
PID 1524 wrote to memory of 568	1524	53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exe	cmd.exe
PID 1524 wrote to memory of 568	1524	53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exe	cmd.exe
PID 1524 wrote to memory of 568	1524	53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exe	cmd.exe
PID 1524 wrote to memory of 568	1524	53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exe	cmd.exe
PID 1524 wrote to memory of 1476	1524	53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exe	sc.exe
PID 1524 wrote to memory of 1476	1524	53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exe	sc.exe
PID 1524 wrote to memory of 1476	1524	53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exe	sc.exe
PID 1524 wrote to memory of 1476	1524	53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exe	sc.exe
PID 1524 wrote to memory of 332	1524	53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exe	sc.exe
PID 1524 wrote to memory of 332	1524	53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exe	sc.exe
PID 1524 wrote to memory of 332	1524	53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exe	sc.exe
PID 1524 wrote to memory of 332	1524	53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exe	sc.exe
PID 1524 wrote to memory of 1748	1524	53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exe	sc.exe
PID 1524 wrote to memory of 1748	1524	53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exe	sc.exe
PID 1524 wrote to memory of 1748	1524	53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exe	sc.exe
PID 1524 wrote to memory of 1748	1524	53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exe	sc.exe
PID 1524 wrote to memory of 1464	1524	53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exe	netsh.exe
PID 1524 wrote to memory of 1464	1524	53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exe	netsh.exe
PID 1524 wrote to memory of 1464	1524	53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exe	netsh.exe
PID 1524 wrote to memory of 1464	1524	53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exe	netsh.exe
PID 928 wrote to memory of 936	928	dkjweemq.exe	svchost.exe
PID 928 wrote to memory of 936	928	dkjweemq.exe	svchost.exe
PID 928 wrote to memory of 936	928	dkjweemq.exe	svchost.exe
PID 928 wrote to memory of 936	928	dkjweemq.exe	svchost.exe
PID 928 wrote to memory of 936	928	dkjweemq.exe	svchost.exe
PID 928 wrote to memory of 936	928	dkjweemq.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exe
"C:\Users\Admin\AppData\Local\Temp\53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1524

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ltywuewf\
2⤵
PID:868

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\dkjweemq.exe" C:\Windows\SysWOW64\ltywuewf\
2⤵
PID:568

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create ltywuewf binPath= "C:\Windows\SysWOW64\ltywuewf\dkjweemq.exe /d\"C:\Users\Admin\AppData\Local\Temp\53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:1476

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description ltywuewf "wifi internet conection"
2⤵
- Launches sc.exe
PID:332

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start ltywuewf
2⤵
- Launches sc.exe
PID:1748

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:1464

C:\Windows\SysWOW64\ltywuewf\dkjweemq.exe
C:\Windows\SysWOW64\ltywuewf\dkjweemq.exe /d"C:\Users\Admin\AppData\Local\Temp\53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:928

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Windows security bypass
- Sets service image path in registry
- Deletes itself
PID:936

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\dkjweemq.exe
Filesize
14.1MB

MD5
4a784b9fb2f1e9d74e5fe6ff01fc1adc

SHA1
e435981edacf0112f9efcdc86ba6a5b09aad02f2

SHA256
56ea1b6849cdf6f47e907231b9f85e36669a83ecd0cbc6f3168dce370e9a0582

SHA512
93ef93c8bf37ffa21b64a4cd0cfdb51b8cf0e8bf9684ae1bc11e190d7dc86475fb87489c7a00794cd4a730bc5d266ef2b5169f03ef6e934fb533859ba0219dc2

Download Submit
C:\Windows\SysWOW64\ltywuewf\dkjweemq.exe
Filesize
14.1MB

MD5
4a784b9fb2f1e9d74e5fe6ff01fc1adc

SHA1
e435981edacf0112f9efcdc86ba6a5b09aad02f2

SHA256
56ea1b6849cdf6f47e907231b9f85e36669a83ecd0cbc6f3168dce370e9a0582

SHA512
93ef93c8bf37ffa21b64a4cd0cfdb51b8cf0e8bf9684ae1bc11e190d7dc86475fb87489c7a00794cd4a730bc5d266ef2b5169f03ef6e934fb533859ba0219dc2

Download Submit
memory/928-64-0x0000000000400000-0x00000000006C7000-memory.dmp

Filesize
2.8MB

Download
memory/936-62-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/936-61-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/936-63-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/936-67-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/936-68-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/936-69-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/936-70-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1524-56-0x00000000003A0000-0x00000000003B3000-memory.dmp

Filesize
76KB

Download
memory/1524-59-0x0000000000400000-0x00000000006C7000-memory.dmp

Filesize
2.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads