tofsee | 1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195

General

Target

1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195.exe
Size

143KB
MD5

aad43b23811400fcc73d8c22b4420660
SHA1

a9230effebe05616919532d05e2506ed503bd422
SHA256

1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195
SHA512

b928c25bf1e18f45ff91ce307f90186724d4c750702459b3da9672794245488adcc1280132bf342ae76a5c9b1a6cdb9220ce26ae675b0591fc0da38917a29005

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:

eguvjrtd.exe

pid process

4552 eguvjrtd.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

3800 netsh.exe

pid	process
4552	eguvjrtd.exe

pid	process
3800	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\vzsnnbjk\ImagePath = "C:\\Windows\\SysWOW64\\vzsnnbjk\\eguvjrtd.exe"	svchost.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Control Panel\International\Geo\Nation	1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

eguvjrtd.exe

description pid process target process

PID 4552 set thread context of 3048 4552 eguvjrtd.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

1956 sc.exe
1776 sc.exe
4216 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

description	pid	process	target process
PID 4552 set thread context of 3048	4552	eguvjrtd.exe	svchost.exe

pid	process
1956	sc.exe
1776	sc.exe
4216	sc.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195.exeeguvjrtd.exe

description	pid	process	target process
PID 5016 wrote to memory of 2472	5016	1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195.exe	cmd.exe
PID 5016 wrote to memory of 2472	5016	1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195.exe	cmd.exe
PID 5016 wrote to memory of 2472	5016	1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195.exe	cmd.exe
PID 5016 wrote to memory of 3208	5016	1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195.exe	cmd.exe
PID 5016 wrote to memory of 3208	5016	1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195.exe	cmd.exe
PID 5016 wrote to memory of 3208	5016	1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195.exe	cmd.exe
PID 5016 wrote to memory of 1956	5016	1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195.exe	sc.exe
PID 5016 wrote to memory of 1956	5016	1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195.exe	sc.exe
PID 5016 wrote to memory of 1956	5016	1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195.exe	sc.exe
PID 5016 wrote to memory of 1776	5016	1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195.exe	sc.exe
PID 5016 wrote to memory of 1776	5016	1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195.exe	sc.exe
PID 5016 wrote to memory of 1776	5016	1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195.exe	sc.exe
PID 5016 wrote to memory of 4216	5016	1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195.exe	sc.exe
PID 5016 wrote to memory of 4216	5016	1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195.exe	sc.exe
PID 5016 wrote to memory of 4216	5016	1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195.exe	sc.exe
PID 5016 wrote to memory of 3800	5016	1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195.exe	netsh.exe
PID 5016 wrote to memory of 3800	5016	1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195.exe	netsh.exe
PID 5016 wrote to memory of 3800	5016	1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195.exe	netsh.exe
PID 4552 wrote to memory of 3048	4552	eguvjrtd.exe	svchost.exe
PID 4552 wrote to memory of 3048	4552	eguvjrtd.exe	svchost.exe
PID 4552 wrote to memory of 3048	4552	eguvjrtd.exe	svchost.exe
PID 4552 wrote to memory of 3048	4552	eguvjrtd.exe	svchost.exe
PID 4552 wrote to memory of 3048	4552	eguvjrtd.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195.exe
"C:\Users\Admin\AppData\Local\Temp\1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5016
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\vzsnnbjk\
  2⤵
  PID:2472
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\eguvjrtd.exe" C:\Windows\SysWOW64\vzsnnbjk\
  2⤵
  PID:3208
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create vzsnnbjk binPath= "C:\Windows\SysWOW64\vzsnnbjk\eguvjrtd.exe /d\"C:\Users\Admin\AppData\Local\Temp\1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:1956
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description vzsnnbjk "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:1776
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start vzsnnbjk
  2⤵
  - Launches sc.exe
  PID:4216
- 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:3800

C:\Windows\SysWOW64\vzsnnbjk\eguvjrtd.exe
C:\Windows\SysWOW64\vzsnnbjk\eguvjrtd.exe /d"C:\Users\Admin\AppData\Local\Temp\1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4552
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  PID:3048

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

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\eguvjrtd.exe

Filesize
10.4MB

MD5
dcdfe1dc7fdd7759a15fcee0eefa78e2

SHA1
427bd61139477334d54963341630ffb4dffe89c8

SHA256
3c8c43f1b08f70537fb10e70aa02333c66213e654cf0e9ecc22a32991e3ed224

SHA512
0b1c52e2eefc06181ca87b284f8585b48687fd97432aa46ee19602273468d5561c561e6db541710626e62449dadd8c138d790ad22253e627fc3033a4a45ac09e

Download Submit
C:\Windows\SysWOW64\vzsnnbjk\eguvjrtd.exe

Filesize
10.4MB

MD5
dcdfe1dc7fdd7759a15fcee0eefa78e2

SHA1
427bd61139477334d54963341630ffb4dffe89c8

SHA256
3c8c43f1b08f70537fb10e70aa02333c66213e654cf0e9ecc22a32991e3ed224

SHA512
0b1c52e2eefc06181ca87b284f8585b48687fd97432aa46ee19602273468d5561c561e6db541710626e62449dadd8c138d790ad22253e627fc3033a4a45ac09e

Download Submit
memory/1776-135-0x0000000000000000-mapping.dmp

Download
memory/1956-134-0x0000000000000000-mapping.dmp

Download
memory/2472-131-0x0000000000000000-mapping.dmp

Download
memory/3048-141-0x0000000001220000-0x0000000001235000-memory.dmp

Filesize
84KB

Download
memory/3048-145-0x0000000001220000-0x0000000001235000-memory.dmp

Filesize
84KB

Download
memory/3048-144-0x0000000001220000-0x0000000001235000-memory.dmp

Filesize
84KB

Download
memory/3048-140-0x0000000000000000-mapping.dmp

Download
memory/3208-132-0x0000000000000000-mapping.dmp

Download
memory/3800-137-0x0000000000000000-mapping.dmp

Download
memory/4216-136-0x0000000000000000-mapping.dmp

Download
memory/4552-139-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/5016-130-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads