tofsee | 204e71a886288bb5d37336b601c608f2b2ce3b8cf3003adef9a3db70d13f0257

General

Target

204e71a886288bb5d37336b601c608f2b2ce3b8cf3003adef9a3db70d13f0257.exe
Size

143KB
MD5

6a07816512f5c3fc626e4f8fcc9b0058
SHA1

217533c5246f3133256dbf6cf09f450bd7e3edcd
SHA256

204e71a886288bb5d37336b601c608f2b2ce3b8cf3003adef9a3db70d13f0257
SHA512

1e65a4680b1e3e2fb94e3a7e0fe53189ebe306bfe61d2a18b3ae4226e28078cd37ad0fcaba58de5b0b542d205b9152c26e32cd596e2954f29cb200b816bfc721

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
Creates new service(s) 1 TTPs
persistence

New Service
T1050
Executes dropped EXE 1 IoCs

Processes:

hhnjxxdv.exe

pid process

832 hhnjxxdv.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

1680 netsh.exe

pid	process
832	hhnjxxdv.exe

pid	process
1680	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\zxsshzty\ImagePath = "C:\\Windows\\SysWOW64\\zxsshzty\\hhnjxxdv.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

1560 svchost.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

hhnjxxdv.exe

description pid process target process

PID 832 set thread context of 1560 832 hhnjxxdv.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

1284 sc.exe
1792 sc.exe
932 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
1560	svchost.exe

description	pid	process	target process
PID 832 set thread context of 1560	832	hhnjxxdv.exe	svchost.exe

pid	process
1284	sc.exe
1792	sc.exe
932	sc.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

204e71a886288bb5d37336b601c608f2b2ce3b8cf3003adef9a3db70d13f0257.exehhnjxxdv.exe

description	pid	process	target process
PID 1840 wrote to memory of 632	1840	204e71a886288bb5d37336b601c608f2b2ce3b8cf3003adef9a3db70d13f0257.exe	cmd.exe
PID 1840 wrote to memory of 632	1840	204e71a886288bb5d37336b601c608f2b2ce3b8cf3003adef9a3db70d13f0257.exe	cmd.exe
PID 1840 wrote to memory of 632	1840	204e71a886288bb5d37336b601c608f2b2ce3b8cf3003adef9a3db70d13f0257.exe	cmd.exe
PID 1840 wrote to memory of 632	1840	204e71a886288bb5d37336b601c608f2b2ce3b8cf3003adef9a3db70d13f0257.exe	cmd.exe
PID 1840 wrote to memory of 1380	1840	204e71a886288bb5d37336b601c608f2b2ce3b8cf3003adef9a3db70d13f0257.exe	cmd.exe
PID 1840 wrote to memory of 1380	1840	204e71a886288bb5d37336b601c608f2b2ce3b8cf3003adef9a3db70d13f0257.exe	cmd.exe
PID 1840 wrote to memory of 1380	1840	204e71a886288bb5d37336b601c608f2b2ce3b8cf3003adef9a3db70d13f0257.exe	cmd.exe
PID 1840 wrote to memory of 1380	1840	204e71a886288bb5d37336b601c608f2b2ce3b8cf3003adef9a3db70d13f0257.exe	cmd.exe
PID 1840 wrote to memory of 1284	1840	204e71a886288bb5d37336b601c608f2b2ce3b8cf3003adef9a3db70d13f0257.exe	sc.exe
PID 1840 wrote to memory of 1284	1840	204e71a886288bb5d37336b601c608f2b2ce3b8cf3003adef9a3db70d13f0257.exe	sc.exe
PID 1840 wrote to memory of 1284	1840	204e71a886288bb5d37336b601c608f2b2ce3b8cf3003adef9a3db70d13f0257.exe	sc.exe
PID 1840 wrote to memory of 1284	1840	204e71a886288bb5d37336b601c608f2b2ce3b8cf3003adef9a3db70d13f0257.exe	sc.exe
PID 1840 wrote to memory of 1792	1840	204e71a886288bb5d37336b601c608f2b2ce3b8cf3003adef9a3db70d13f0257.exe	sc.exe
PID 1840 wrote to memory of 1792	1840	204e71a886288bb5d37336b601c608f2b2ce3b8cf3003adef9a3db70d13f0257.exe	sc.exe
PID 1840 wrote to memory of 1792	1840	204e71a886288bb5d37336b601c608f2b2ce3b8cf3003adef9a3db70d13f0257.exe	sc.exe
PID 1840 wrote to memory of 1792	1840	204e71a886288bb5d37336b601c608f2b2ce3b8cf3003adef9a3db70d13f0257.exe	sc.exe
PID 1840 wrote to memory of 932	1840	204e71a886288bb5d37336b601c608f2b2ce3b8cf3003adef9a3db70d13f0257.exe	sc.exe
PID 1840 wrote to memory of 932	1840	204e71a886288bb5d37336b601c608f2b2ce3b8cf3003adef9a3db70d13f0257.exe	sc.exe
PID 1840 wrote to memory of 932	1840	204e71a886288bb5d37336b601c608f2b2ce3b8cf3003adef9a3db70d13f0257.exe	sc.exe
PID 1840 wrote to memory of 932	1840	204e71a886288bb5d37336b601c608f2b2ce3b8cf3003adef9a3db70d13f0257.exe	sc.exe
PID 1840 wrote to memory of 1680	1840	204e71a886288bb5d37336b601c608f2b2ce3b8cf3003adef9a3db70d13f0257.exe	netsh.exe
PID 1840 wrote to memory of 1680	1840	204e71a886288bb5d37336b601c608f2b2ce3b8cf3003adef9a3db70d13f0257.exe	netsh.exe
PID 1840 wrote to memory of 1680	1840	204e71a886288bb5d37336b601c608f2b2ce3b8cf3003adef9a3db70d13f0257.exe	netsh.exe
PID 1840 wrote to memory of 1680	1840	204e71a886288bb5d37336b601c608f2b2ce3b8cf3003adef9a3db70d13f0257.exe	netsh.exe
PID 832 wrote to memory of 1560	832	hhnjxxdv.exe	svchost.exe
PID 832 wrote to memory of 1560	832	hhnjxxdv.exe	svchost.exe
PID 832 wrote to memory of 1560	832	hhnjxxdv.exe	svchost.exe
PID 832 wrote to memory of 1560	832	hhnjxxdv.exe	svchost.exe
PID 832 wrote to memory of 1560	832	hhnjxxdv.exe	svchost.exe
PID 832 wrote to memory of 1560	832	hhnjxxdv.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\204e71a886288bb5d37336b601c608f2b2ce3b8cf3003adef9a3db70d13f0257.exe
"C:\Users\Admin\AppData\Local\Temp\204e71a886288bb5d37336b601c608f2b2ce3b8cf3003adef9a3db70d13f0257.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1840

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\zxsshzty\
2⤵
PID:632

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\hhnjxxdv.exe" C:\Windows\SysWOW64\zxsshzty\
2⤵
PID:1380

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create zxsshzty binPath= "C:\Windows\SysWOW64\zxsshzty\hhnjxxdv.exe /d\"C:\Users\Admin\AppData\Local\Temp\204e71a886288bb5d37336b601c608f2b2ce3b8cf3003adef9a3db70d13f0257.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:1284

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description zxsshzty "wifi internet conection"
2⤵
- Launches sc.exe
PID:1792

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start zxsshzty
2⤵
- Launches sc.exe
PID:932

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:1680

C:\Windows\SysWOW64\zxsshzty\hhnjxxdv.exe
C:\Windows\SysWOW64\zxsshzty\hhnjxxdv.exe /d"C:\Users\Admin\AppData\Local\Temp\204e71a886288bb5d37336b601c608f2b2ce3b8cf3003adef9a3db70d13f0257.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:832

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
- Deletes itself
PID:1560

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Modify Existing Service

New Service

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

New Service

1

T1050

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\hhnjxxdv.exe
Filesize
13.5MB

MD5
1dca3615722cad90c41f28b6e6d6386a

SHA1
5bf6275b7e96d7c6c3363e85a976c669d8c52b69

SHA256
4bef4668cd937a13bde3798f21dcace5f769a7d925d1b895f92f126d312c9465

SHA512
12db228ef7d1d0c48cff9d2dfcc3c2b78f030f1c69b96f8927fbc57d1531b07ae81dba54781c9b7a8e55d741348701b846f9843002631ef24e28af89ff7d057e

Download Submit
C:\Windows\SysWOW64\zxsshzty\hhnjxxdv.exe
Filesize
13.5MB

MD5
1dca3615722cad90c41f28b6e6d6386a

SHA1
5bf6275b7e96d7c6c3363e85a976c669d8c52b69

SHA256
4bef4668cd937a13bde3798f21dcace5f769a7d925d1b895f92f126d312c9465

SHA512
12db228ef7d1d0c48cff9d2dfcc3c2b78f030f1c69b96f8927fbc57d1531b07ae81dba54781c9b7a8e55d741348701b846f9843002631ef24e28af89ff7d057e

Download Submit
memory/632-56-0x0000000000000000-mapping.dmp

Download
memory/832-65-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/932-61-0x0000000000000000-mapping.dmp

Download
memory/1284-59-0x0000000000000000-mapping.dmp

Download
memory/1380-57-0x0000000000000000-mapping.dmp

Download
memory/1560-67-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1560-69-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1560-70-0x0000000000089A6B-mapping.dmp

Download
memory/1560-74-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1560-75-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1680-62-0x0000000000000000-mapping.dmp

Download
memory/1792-60-0x0000000000000000-mapping.dmp

Download
memory/1840-55-0x0000000074F91000-0x0000000074F93000-memory.dmp

Filesize
8KB

Download
memory/1840-54-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download

Analysis

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