darkvnc | 52360c0e4a8a0b15142e84efc054178f40b2ed0229a851cff5dfc643497a308a

General

Target

usfive_20210702-192138.exe
Size

478KB
MD5

a72fbbe3a7d5a04db51f223d506f03ec
SHA1

eff774728ed867c29a48deeac1a3b68462b303ed
SHA256

52360c0e4a8a0b15142e84efc054178f40b2ed0229a851cff5dfc643497a308a
SHA512

51eecb7d12094122e6bcd19ad0d65dadd0af98f619df84422348bc993afc7342a7f59d345d67de793d130e154b71ca781df95c80d2aec727fbc1f369bf9ee01d

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/1224-79-0x00000000002B0000-0x0000000000338000-memory.dmp	darkvnc
behavioral1/memory/1224-80-0x0000000000400000-0x0000000000612000-memory.dmp	darkvnc
behavioral1/memory/384-82-0x0000000001C90000-0x0000000001D5A000-memory.dmp	darkvnc

Downloads MZ/PE file

Executes dropped EXE 1 IoCs

pid	Process
1224	XIyVJQ3YvD.exe

Deletes itself 1 IoCs

pid	Process
1692	cmd.exe

Loads dropped DLL 10 IoCs

pid	Process
1116	usfive_20210702-192138.exe
1116	usfive_20210702-192138.exe
1116	usfive_20210702-192138.exe
1116	usfive_20210702-192138.exe
1116	usfive_20210702-192138.exe
1116	usfive_20210702-192138.exe
1116	usfive_20210702-192138.exe
1116	usfive_20210702-192138.exe
1116	usfive_20210702-192138.exe
1116	usfive_20210702-192138.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 1224 set thread context of 384	1224	XIyVJQ3YvD.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_20210702-192138.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\DAC9024F54D8F6DF94935FB1732638CA6AD77C13\Blob = 040000000100000010000000410352dc0ff7501b16f0028eba6f45c50f00000001000000140000005bcaa1c2780f0bcb5a90770451d96f38963f012d0b000000010000001e000000440053005400200052006f006f0074002000430041002000580033000000090000000100000016000000301406082b0601050507030406082b06010505070301140000000100000014000000c4a7b1a47b2c71fadbe14b9075ffc415608589101d00000001000000100000004558d512eecb27464920897de7b66053030000000100000014000000dac9024f54d8f6df94935fb1732638ca6ad77c131900000001000000100000006cf252fec3e8f20996de5d4dd9aef42420000000010000004e0300003082034a30820232a003020102021044afb080d6a327ba893039862ef8406b300d06092a864886f70d0101050500303f31243022060355040a131b4469676974616c205369676e617475726520547275737420436f2e311730150603550403130e44535420526f6f74204341205833301e170d3030303933303231313231395a170d3231303933303134303131355a303f31243022060355040a131b4469676974616c205369676e617475726520547275737420436f2e311730150603550403130e44535420526f6f7420434120583330820122300d06092a864886f70d01010105000382010f003082010a0282010100dfafe99750088357b4cc6265f69082ecc7d32c6b30ca5becd9c37dc740c118148be0e83376492ae33f214993ac4e0eaf3e48cb65eefcd3210f65d22ad9328f8ce5f777b0127bb595c089a3a9baed732e7a0c063283a27e8a1430cd11a0e12a38b9790a31fd50bd8065dfb7516383c8e28861ea4b6181ec526bb9a2e24b1a289f48a39e0cda098e3e172e1edd20df5bc62a8aab2ebd70adc50b1a25907472c57b6aab34d63089ffe568137b540bc8d6aeec5a9c921e3d64b38cc6dfbfc94170ec1672d526ec38553943d0fcfd185c40f197ebd59a9b8d1dbada25b9c6d8dfc115023aabda6ef13e2ef55c089c3cd68369e4109b192ab62957e3e53d9b9ff0025d0203010001a3423040300f0603551d130101ff040530030101ff300e0603551d0f0101ff040403020106301d0603551d0e04160414c4a7b1a47b2c71fadbe14b9075ffc41560858910300d06092a864886f70d01010505000382010100a31a2c9b17005ca91eee2866373abf83c73f4bc309a095205de3d95944d23e0d3ebd8a4ba0741fce10829c741a1d7e981addcb134bb32044e491e9ccfc7da5db6ae5fee6fde04eddb7003ab57049aff2e5eb02f1d1028b19cb943a5e48c4181e58195f1e025af00cf1b1ada9dc59868b6ee991f586cafab96633aa595bcee2a7167347cb2bcc99b03748cfe3564bf5cf0f0c723287c6f044bb53726d43f526489a5267b758abfe67767178db0da256141339243185a2a8025a3047e1dd5007bc02099000eb6463609b16bc88c912e6d27d918bf93d328d65b4e97cb15776eac5b62839bf15651cc8f677966a0a8d770bd8910b048e07db29b60aee9d82353510	usfive_20210702-192138.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
1224	XIyVJQ3YvD.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 1116 wrote to memory of 1224	1116	usfive_20210702-192138.exe	30
PID 1116 wrote to memory of 1224	1116	usfive_20210702-192138.exe	30
PID 1116 wrote to memory of 1224	1116	usfive_20210702-192138.exe	30
PID 1116 wrote to memory of 1224	1116	usfive_20210702-192138.exe	30
PID 1116 wrote to memory of 1692	1116	usfive_20210702-192138.exe	31
PID 1116 wrote to memory of 1692	1116	usfive_20210702-192138.exe	31
PID 1116 wrote to memory of 1692	1116	usfive_20210702-192138.exe	31
PID 1116 wrote to memory of 1692	1116	usfive_20210702-192138.exe	31
PID 1692 wrote to memory of 956	1692	cmd.exe	33
PID 1692 wrote to memory of 956	1692	cmd.exe	33
PID 1692 wrote to memory of 956	1692	cmd.exe	33
PID 1692 wrote to memory of 956	1692	cmd.exe	33
PID 1224 wrote to memory of 384	1224	XIyVJQ3YvD.exe	34
PID 1224 wrote to memory of 384	1224	XIyVJQ3YvD.exe	34
PID 1224 wrote to memory of 384	1224	XIyVJQ3YvD.exe	34
PID 1224 wrote to memory of 384	1224	XIyVJQ3YvD.exe	34
PID 1224 wrote to memory of 384	1224	XIyVJQ3YvD.exe	34
PID 1224 wrote to memory of 384	1224	XIyVJQ3YvD.exe	34
PID 1224 wrote to memory of 384	1224	XIyVJQ3YvD.exe	34

C:\Users\Admin\AppData\Local\Temp\usfive_20210702-192138.exe
"C:\Users\Admin\AppData\Local\Temp\usfive_20210702-192138.exe"
1⤵
- Loads dropped DLL
- Modifies system certificate store
- Suspicious use of WriteProcessMemory
PID:1116
- C:\Users\Admin\AppData\Local\Temp\XIyVJQ3YvD.exe
  "C:\Users\Admin\AppData\Local\Temp\XIyVJQ3YvD.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:1224
- - C:\Windows\system32\WerFault.exe
    C:\Windows\system32\WerFault.exe
    3⤵
    PID:384
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /C timeout /T 10 /NOBREAK > Nul & Del /f /q "C:\Users\Admin\AppData\Local\Temp\usfive_20210702-192138.exe"
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:1692
- - 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/384-81-0x00000000000F0000-0x00000000000F1000-memory.dmp

Filesize
4KB

Download
memory/384-82-0x0000000001C90000-0x0000000001D5A000-memory.dmp

Filesize
808KB

Download
memory/384-78-0x000007FEFC301000-0x000007FEFC303000-memory.dmp

Filesize
8KB

Download
memory/1116-61-0x0000000000400000-0x0000000000622000-memory.dmp

Filesize
2.1MB

Download
memory/1116-60-0x00000000002D0000-0x0000000000361000-memory.dmp

Filesize
580KB

Download
memory/1116-59-0x00000000767B1000-0x00000000767B3000-memory.dmp

Filesize
8KB

Download
memory/1224-79-0x00000000002B0000-0x0000000000338000-memory.dmp

Filesize
544KB

Download
memory/1224-80-0x0000000000400000-0x0000000000612000-memory.dmp

Filesize
2.1MB

Download

Analysis

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