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

Suspicious use of NtCreateProcessExOtherParentProcess 1 IoCs

description	pid	Process	procid_target
PID 2484 created 1256	2484	WerFault.exe	78

DarkVNC Payload 3 IoCs

rat

resource	yara_rule
behavioral2/memory/1256-128-0x0000000000690000-0x000000000073E000-memory.dmp	darkvnc
behavioral2/memory/1256-129-0x0000000000400000-0x0000000000612000-memory.dmp	darkvnc
behavioral2/memory/3832-132-0x000001A0D5950000-0x000001A0D5AF9000-memory.dmp	darkvnc

Downloads MZ/PE file

Executes dropped EXE 1 IoCs

pid	Process
1256	wP4x2sDay4.exe

Loads dropped DLL 6 IoCs

pid	Process
568	usfive_20210702-140549.exe
568	usfive_20210702-140549.exe
568	usfive_20210702-140549.exe
568	usfive_20210702-140549.exe
568	usfive_20210702-140549.exe
568	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 1256 set thread context of 3832	1256	wP4x2sDay4.exe	82

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2484	1256	WerFault.exe	78

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
3520	timeout.exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

pid	Process
2484	WerFault.exe
2484	WerFault.exe
2484	WerFault.exe
2484	WerFault.exe
2484	WerFault.exe
2484	WerFault.exe
2484	WerFault.exe
2484	WerFault.exe
2484	WerFault.exe
2484	WerFault.exe
2484	WerFault.exe
2484	WerFault.exe
2484	WerFault.exe
2484	WerFault.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
1256	wP4x2sDay4.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeRestorePrivilege	2484	WerFault.exe
Token: SeBackupPrivilege	2484	WerFault.exe
Token: SeDebugPrivilege	2484	WerFault.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 568 wrote to memory of 1256	568	usfive_20210702-140549.exe	78
PID 568 wrote to memory of 1256	568	usfive_20210702-140549.exe	78
PID 568 wrote to memory of 1256	568	usfive_20210702-140549.exe	78
PID 568 wrote to memory of 3692	568	usfive_20210702-140549.exe	79
PID 568 wrote to memory of 3692	568	usfive_20210702-140549.exe	79
PID 568 wrote to memory of 3692	568	usfive_20210702-140549.exe	79
PID 3692 wrote to memory of 3520	3692	cmd.exe	81
PID 3692 wrote to memory of 3520	3692	cmd.exe	81
PID 3692 wrote to memory of 3520	3692	cmd.exe	81
PID 1256 wrote to memory of 3832	1256	wP4x2sDay4.exe	82
PID 1256 wrote to memory of 3832	1256	wP4x2sDay4.exe	82
PID 1256 wrote to memory of 3832	1256	wP4x2sDay4.exe	82
PID 1256 wrote to memory of 3832	1256	wP4x2sDay4.exe	82
PID 1256 wrote to memory of 3832	1256	wP4x2sDay4.exe	82

C:\Users\Admin\AppData\Local\Temp\usfive_20210702-140549.exe
"C:\Users\Admin\AppData\Local\Temp\usfive_20210702-140549.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:568
- C:\Users\Admin\AppData\Local\Temp\wP4x2sDay4.exe
  "C:\Users\Admin\AppData\Local\Temp\wP4x2sDay4.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:1256
- - C:\Windows\system32\WerFault.exe
    C:\Windows\system32\WerFault.exe
    3⤵
    PID:3832
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1256 -s 480
    3⤵
    - Suspicious use of NtCreateProcessExOtherParentProcess
    - Program crash
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2484
- 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⤵
  - Suspicious use of WriteProcessMemory
  PID:3692
- - C:\Windows\SysWOW64\timeout.exe
    timeout /T 10 /NOBREAK
    3⤵
    - Delays execution with timeout.exe
    PID:3520

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

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

Loading Replay Monitor...

Downloads

memory/568-115-0x0000000000400000-0x0000000000622000-memory.dmp

Filesize
2.1MB

Download
memory/568-114-0x0000000000A60000-0x0000000000AF1000-memory.dmp

Filesize
580KB

Download
memory/1256-128-0x0000000000690000-0x000000000073E000-memory.dmp

Filesize
696KB

Download
memory/1256-129-0x0000000000400000-0x0000000000612000-memory.dmp

Filesize
2.1MB

Download
memory/3832-132-0x000001A0D5950000-0x000001A0D5AF9000-memory.dmp

Filesize
1.7MB

Download
memory/3832-131-0x000001A0D57D0000-0x000001A0D57D1000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing