darkvnc | 3803b0d480e36400557365f3f32e264b80d89acded0921d0d28e1f11ea1710a1

General

Target

usfive_20210702-140549.exe
Size

478KB
MD5

235dfb514cc7c9d0115e881531b22fe0
SHA1

963119b6160695cc30d5f827e12e9c843b666f2f
SHA256

3803b0d480e36400557365f3f32e264b80d89acded0921d0d28e1f11ea1710a1
SHA512

89d50c7d5f540ceadd41d5f68500bedaae029cbd92a6f4161dcc84fabda74cc5799dee27a0c98e9254bd662f0a8abef818af8988eb381f2acfa52faa5c72374b

Score

10^/10

darkvnc raccoon 7ea5512058d479def2eeb58bd2231423ad2fdf37 discovery rat spyware stealer

Malware Config

Extracted

Family

raccoon

Botnet

7ea5512058d479def2eeb58bd2231423ad2fdf37

Attributes

url4cnc
https://telete.in/h_electricryptors2

rc4.plain

Signatures

DarkVNC
DarkVNC is a malicious version of the famous VNC software.
rat darkvnc
Raccoon
Simple but powerful infostealer which was very active in 2019.
stealer raccoon

DarkVNC Payload 3 IoCs

rat

resource	yara_rule
behavioral1/memory/1752-79-0x00000000002A0000-0x0000000000328000-memory.dmp	darkvnc
behavioral1/memory/1752-80-0x0000000000400000-0x0000000000612000-memory.dmp	darkvnc
behavioral1/memory/1604-82-0x00000000002A0000-0x000000000036A000-memory.dmp	darkvnc

Downloads MZ/PE file

Executes dropped EXE 1 IoCs

pid	Process
1752	AWeMrJWlFF.exe

Deletes itself 1 IoCs

pid	Process
532	cmd.exe

Loads dropped DLL 10 IoCs

pid	Process
1180	usfive_20210702-140549.exe
1180	usfive_20210702-140549.exe
1180	usfive_20210702-140549.exe
1180	usfive_20210702-140549.exe
1180	usfive_20210702-140549.exe
1180	usfive_20210702-140549.exe
1180	usfive_20210702-140549.exe
1180	usfive_20210702-140549.exe
1180	usfive_20210702-140549.exe
1180	usfive_20210702-140549.exe

Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1752 set thread context of 1604	1752	AWeMrJWlFF.exe	34

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

System Information Discovery
T1082

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
956	timeout.exe

Modifies system certificate store 2 TTPs 2 IoCs

evasion spyware trojan

Install Root Certificate

T1130

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\DAC9024F54D8F6DF94935FB1732638CA6AD77C13	usfive_20210702-140549.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\DAC9024F54D8F6DF94935FB1732638CA6AD77C13\Blob = 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	usfive_20210702-140549.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
1752	AWeMrJWlFF.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 1180 wrote to memory of 1752	1180	usfive_20210702-140549.exe	30
PID 1180 wrote to memory of 1752	1180	usfive_20210702-140549.exe	30
PID 1180 wrote to memory of 1752	1180	usfive_20210702-140549.exe	30
PID 1180 wrote to memory of 1752	1180	usfive_20210702-140549.exe	30
PID 1180 wrote to memory of 532	1180	usfive_20210702-140549.exe	31
PID 1180 wrote to memory of 532	1180	usfive_20210702-140549.exe	31
PID 1180 wrote to memory of 532	1180	usfive_20210702-140549.exe	31
PID 1180 wrote to memory of 532	1180	usfive_20210702-140549.exe	31
PID 532 wrote to memory of 956	532	cmd.exe	33
PID 532 wrote to memory of 956	532	cmd.exe	33
PID 532 wrote to memory of 956	532	cmd.exe	33
PID 532 wrote to memory of 956	532	cmd.exe	33
PID 1752 wrote to memory of 1604	1752	AWeMrJWlFF.exe	34
PID 1752 wrote to memory of 1604	1752	AWeMrJWlFF.exe	34
PID 1752 wrote to memory of 1604	1752	AWeMrJWlFF.exe	34
PID 1752 wrote to memory of 1604	1752	AWeMrJWlFF.exe	34
PID 1752 wrote to memory of 1604	1752	AWeMrJWlFF.exe	34
PID 1752 wrote to memory of 1604	1752	AWeMrJWlFF.exe	34
PID 1752 wrote to memory of 1604	1752	AWeMrJWlFF.exe	34

C:\Users\Admin\AppData\Local\Temp\usfive_20210702-140549.exe
"C:\Users\Admin\AppData\Local\Temp\usfive_20210702-140549.exe"
1⤵
- Loads dropped DLL
- Modifies system certificate store
- Suspicious use of WriteProcessMemory
PID:1180
- C:\Users\Admin\AppData\Local\Temp\AWeMrJWlFF.exe
  "C:\Users\Admin\AppData\Local\Temp\AWeMrJWlFF.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:1752
- - C:\Windows\system32\WerFault.exe
    C:\Windows\system32\WerFault.exe
    3⤵
    PID:1604
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /C timeout /T 10 /NOBREAK > Nul & Del /f /q "C:\Users\Admin\AppData\Local\Temp\usfive_20210702-140549.exe"
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:532
- - C:\Windows\SysWOW64\timeout.exe
    timeout /T 10 /NOBREAK
    3⤵
    - Delays execution with timeout.exe
    PID:956

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Install Root Certificate

Modify Registry

Credential Access

Credentials in Files

2

T1081

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

2

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1180-61-0x0000000000400000-0x0000000000622000-memory.dmp

Filesize
2.1MB

Download
memory/1180-59-0x0000000075EF1000-0x0000000075EF3000-memory.dmp

Filesize
8KB

Download
memory/1180-60-0x0000000000220000-0x00000000002B1000-memory.dmp

Filesize
580KB

Download
memory/1604-78-0x000007FEFC181000-0x000007FEFC183000-memory.dmp

Filesize
8KB

Download
memory/1604-81-0x0000000000200000-0x0000000000201000-memory.dmp

Filesize
4KB

Download
memory/1604-82-0x00000000002A0000-0x000000000036A000-memory.dmp

Filesize
808KB

Download
memory/1752-79-0x00000000002A0000-0x0000000000328000-memory.dmp

Filesize
544KB

Download
memory/1752-80-0x0000000000400000-0x0000000000612000-memory.dmp

Filesize
2.1MB

Download

Analysis

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