tofsee | 61d06bf851691930e040bb472f567fa64a973936bd43fe325096e33b4bc48334

General

Target

61d06bf851691930e040bb472f567fa64a973936bd43fe325096e33b4bc48334.exe
Size

139KB
MD5

59716c29133bdaf34175ab183a1a7e3c
SHA1

e265094493c86a5a5a2596563cb9c47c592ec599
SHA256

61d06bf851691930e040bb472f567fa64a973936bd43fe325096e33b4bc48334
SHA512

68b05b8a8ca0c40a395de19ed8792c59641155f69e0a9704505a016872de88c5c7f6784f54b0740f0ffb3668bcf85bb263cfc59f7dcdcc50c73444a18976b3eb

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:

caoabwua.exe

pid process

548 caoabwua.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

988 netsh.exe

pid	process
548	caoabwua.exe

pid	process
988	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\cyrxspkx\ImagePath = "C:\\Windows\\SysWOW64\\cyrxspkx\\caoabwua.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

692 svchost.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

caoabwua.exe

description pid process target process

PID 548 set thread context of 692 548 caoabwua.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

908 sc.exe
1036 sc.exe
1500 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
692	svchost.exe

description	pid	process	target process
PID 548 set thread context of 692	548	caoabwua.exe	svchost.exe

pid	process
908	sc.exe
1036	sc.exe
1500	sc.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

61d06bf851691930e040bb472f567fa64a973936bd43fe325096e33b4bc48334.execaoabwua.exe

description	pid	process	target process
PID 272 wrote to memory of 1424	272	61d06bf851691930e040bb472f567fa64a973936bd43fe325096e33b4bc48334.exe	cmd.exe
PID 272 wrote to memory of 1424	272	61d06bf851691930e040bb472f567fa64a973936bd43fe325096e33b4bc48334.exe	cmd.exe
PID 272 wrote to memory of 1424	272	61d06bf851691930e040bb472f567fa64a973936bd43fe325096e33b4bc48334.exe	cmd.exe
PID 272 wrote to memory of 1424	272	61d06bf851691930e040bb472f567fa64a973936bd43fe325096e33b4bc48334.exe	cmd.exe
PID 272 wrote to memory of 1292	272	61d06bf851691930e040bb472f567fa64a973936bd43fe325096e33b4bc48334.exe	cmd.exe
PID 272 wrote to memory of 1292	272	61d06bf851691930e040bb472f567fa64a973936bd43fe325096e33b4bc48334.exe	cmd.exe
PID 272 wrote to memory of 1292	272	61d06bf851691930e040bb472f567fa64a973936bd43fe325096e33b4bc48334.exe	cmd.exe
PID 272 wrote to memory of 1292	272	61d06bf851691930e040bb472f567fa64a973936bd43fe325096e33b4bc48334.exe	cmd.exe
PID 272 wrote to memory of 908	272	61d06bf851691930e040bb472f567fa64a973936bd43fe325096e33b4bc48334.exe	sc.exe
PID 272 wrote to memory of 908	272	61d06bf851691930e040bb472f567fa64a973936bd43fe325096e33b4bc48334.exe	sc.exe
PID 272 wrote to memory of 908	272	61d06bf851691930e040bb472f567fa64a973936bd43fe325096e33b4bc48334.exe	sc.exe
PID 272 wrote to memory of 908	272	61d06bf851691930e040bb472f567fa64a973936bd43fe325096e33b4bc48334.exe	sc.exe
PID 272 wrote to memory of 1036	272	61d06bf851691930e040bb472f567fa64a973936bd43fe325096e33b4bc48334.exe	sc.exe
PID 272 wrote to memory of 1036	272	61d06bf851691930e040bb472f567fa64a973936bd43fe325096e33b4bc48334.exe	sc.exe
PID 272 wrote to memory of 1036	272	61d06bf851691930e040bb472f567fa64a973936bd43fe325096e33b4bc48334.exe	sc.exe
PID 272 wrote to memory of 1036	272	61d06bf851691930e040bb472f567fa64a973936bd43fe325096e33b4bc48334.exe	sc.exe
PID 272 wrote to memory of 1500	272	61d06bf851691930e040bb472f567fa64a973936bd43fe325096e33b4bc48334.exe	sc.exe
PID 272 wrote to memory of 1500	272	61d06bf851691930e040bb472f567fa64a973936bd43fe325096e33b4bc48334.exe	sc.exe
PID 272 wrote to memory of 1500	272	61d06bf851691930e040bb472f567fa64a973936bd43fe325096e33b4bc48334.exe	sc.exe
PID 272 wrote to memory of 1500	272	61d06bf851691930e040bb472f567fa64a973936bd43fe325096e33b4bc48334.exe	sc.exe
PID 272 wrote to memory of 988	272	61d06bf851691930e040bb472f567fa64a973936bd43fe325096e33b4bc48334.exe	netsh.exe
PID 272 wrote to memory of 988	272	61d06bf851691930e040bb472f567fa64a973936bd43fe325096e33b4bc48334.exe	netsh.exe
PID 272 wrote to memory of 988	272	61d06bf851691930e040bb472f567fa64a973936bd43fe325096e33b4bc48334.exe	netsh.exe
PID 272 wrote to memory of 988	272	61d06bf851691930e040bb472f567fa64a973936bd43fe325096e33b4bc48334.exe	netsh.exe
PID 548 wrote to memory of 692	548	caoabwua.exe	svchost.exe
PID 548 wrote to memory of 692	548	caoabwua.exe	svchost.exe
PID 548 wrote to memory of 692	548	caoabwua.exe	svchost.exe
PID 548 wrote to memory of 692	548	caoabwua.exe	svchost.exe
PID 548 wrote to memory of 692	548	caoabwua.exe	svchost.exe
PID 548 wrote to memory of 692	548	caoabwua.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\61d06bf851691930e040bb472f567fa64a973936bd43fe325096e33b4bc48334.exe
"C:\Users\Admin\AppData\Local\Temp\61d06bf851691930e040bb472f567fa64a973936bd43fe325096e33b4bc48334.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:272

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\cyrxspkx\
2⤵
PID:1424

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\caoabwua.exe" C:\Windows\SysWOW64\cyrxspkx\
2⤵
PID:1292

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create cyrxspkx binPath= "C:\Windows\SysWOW64\cyrxspkx\caoabwua.exe /d\"C:\Users\Admin\AppData\Local\Temp\61d06bf851691930e040bb472f567fa64a973936bd43fe325096e33b4bc48334.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:908

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description cyrxspkx "wifi internet conection"
2⤵
- Launches sc.exe
PID:1036

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start cyrxspkx
2⤵
- Launches sc.exe
PID:1500

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:988

C:\Windows\SysWOW64\cyrxspkx\caoabwua.exe
C:\Windows\SysWOW64\cyrxspkx\caoabwua.exe /d"C:\Users\Admin\AppData\Local\Temp\61d06bf851691930e040bb472f567fa64a973936bd43fe325096e33b4bc48334.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:548

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
- Deletes itself
PID:692

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

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\caoabwua.exe
Filesize
11.3MB

MD5
0af183b5374863285d46fbcf2a5949ae

SHA1
695e80cb1d7d8ff29dd6aeda10e0ffe144ff8792

SHA256
9214c60a714dad619bee94cd218eb64c9571e407ffbf2bea6df6a6948c11e858

SHA512
fc4c14fe3dd70fa6237d72f294da34513ea08323b72ae95f2f29970d43b43d0ccb83acc0124571a69c8d9da105cebd39081b55d2194fb3cf14672978bf221117

Download Submit
C:\Windows\SysWOW64\cyrxspkx\caoabwua.exe
Filesize
11.3MB

MD5
0af183b5374863285d46fbcf2a5949ae

SHA1
695e80cb1d7d8ff29dd6aeda10e0ffe144ff8792

SHA256
9214c60a714dad619bee94cd218eb64c9571e407ffbf2bea6df6a6948c11e858

SHA512
fc4c14fe3dd70fa6237d72f294da34513ea08323b72ae95f2f29970d43b43d0ccb83acc0124571a69c8d9da105cebd39081b55d2194fb3cf14672978bf221117

Download Submit
memory/272-55-0x0000000075CE1000-0x0000000075CE3000-memory.dmp

Filesize
8KB

Download
memory/272-54-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/548-65-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/692-69-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/692-75-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/692-74-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/692-73-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/692-70-0x00000000000C9A6B-mapping.dmp

Download
memory/692-67-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/908-59-0x0000000000000000-mapping.dmp

Download
memory/988-63-0x0000000000000000-mapping.dmp

Download
memory/1036-60-0x0000000000000000-mapping.dmp

Download
memory/1292-57-0x0000000000000000-mapping.dmp

Download
memory/1424-56-0x0000000000000000-mapping.dmp

Download
memory/1500-61-0x0000000000000000-mapping.dmp

Download

Analysis

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