dcrat | e2d7af5ece97e32f2518977081188e7df2706e71a71d27dc739c68e0117542a6

Analysis

max time kernel
9s
max time network
129s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
11/01/2024, 04:19

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General

Target
52840b21329e395164b93a484e12a024.exe
Size 2.1MB
Sample240111-expqpsedgr
SHA256 e2d7af5ece97e32f2518977081188e7df2706e71a71d27dc739c68e0117542a6
MD5 52840b21329e395164b93a484e12a024
SHA1 761833037303a70ee7058cdb2bef1ab6102dff6e
SHA512 87876036fc116f416cacab94be5269618723b0497be3b05698011dae26b55b1f5d391bc2808af11f78f4b5051f5259c27ffef2b73c2ebf989849df7ca7f6c81b
SSDEEP 24576:IYvhk8mtcbjQe0cjg+nufbNfLNsnop+4jYvhk8mtcbjQe0cjg+nufbNfLNsnop+4:R+W04184N+W04184
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

dcrat 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 4 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral2/memory/488-0-0x0000000000750000-0x0000000000864000-memory.dmp	dcrat
behavioral2/files/0x0006000000023231-21.dat	dcrat
behavioral2/files/0x0006000000023286-90.dat	dcrat
behavioral2/files/0x0006000000023286-89.dat	dcrat

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\System32\fdprint\dllhost.exe	52840b21329e395164b93a484e12a024.exe
File opened for modification	C:\Windows\System32\fdprint\dllhost.exe	52840b21329e395164b93a484e12a024.exe
File created	C:\Windows\System32\fdprint\5940a34987c99120d96dace90a3f93f329dcad63	52840b21329e395164b93a484e12a024.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\bootstat\explorer.exe	52840b21329e395164b93a484e12a024.exe
File created	C:\Windows\bootstat\7a0fd90576e08807bde2cc57bcf9854bbce05fe3	52840b21329e395164b93a484e12a024.exe

Creates scheduled task(s) 1 TTPs 26 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
4496	schtasks.exe
2504	schtasks.exe
5092	schtasks.exe
1488	schtasks.exe
216	schtasks.exe
4352	schtasks.exe
4408	schtasks.exe
4016	schtasks.exe
1136	schtasks.exe
3312	schtasks.exe
4536	schtasks.exe
2668	schtasks.exe
1692	schtasks.exe
1464	schtasks.exe
4572	schtasks.exe
4996	schtasks.exe
2060	schtasks.exe
2504	schtasks.exe
1156	schtasks.exe
1640	schtasks.exe
2600	schtasks.exe
3348	schtasks.exe
2340	schtasks.exe
4976	schtasks.exe
2692	schtasks.exe
2480	schtasks.exe

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
4332	PING.EXE
4496	PING.EXE
1044	PING.EXE

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
488	52840b21329e395164b93a484e12a024.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	488	52840b21329e395164b93a484e12a024.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 488 wrote to memory of 4496	488	52840b21329e395164b93a484e12a024.exe	126
PID 488 wrote to memory of 4496	488	52840b21329e395164b93a484e12a024.exe	126
PID 488 wrote to memory of 3348	488	52840b21329e395164b93a484e12a024.exe	92
PID 488 wrote to memory of 3348	488	52840b21329e395164b93a484e12a024.exe	92
PID 488 wrote to memory of 2504	488	52840b21329e395164b93a484e12a024.exe	153
PID 488 wrote to memory of 2504	488	52840b21329e395164b93a484e12a024.exe	153
PID 488 wrote to memory of 2340	488	52840b21329e395164b93a484e12a024.exe	95
PID 488 wrote to memory of 2340	488	52840b21329e395164b93a484e12a024.exe	95

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\52840b21329e395164b93a484e12a024.exe
"C:\Users\Admin\AppData\Local\Temp\52840b21329e395164b93a484e12a024.exe"
1⤵
- Drops file in System32 directory
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:488
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "dllhost" /sc ONLOGON /tr "'C:\Windows\System32\fdprint\dllhost.exe'" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:4496
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Users\All Users\Application Data\RuntimeBroker.exe'" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:3348
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "sppsvc" /sc ONLOGON /tr "'C:\ProgramData\Start Menu\sppsvc.exe'" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:2340
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "explorer" /sc ONLOGON /tr "'C:\Windows\bootstat\explorer.exe'" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:2504
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\Ui7bMzIuXT.bat"
  2⤵
  PID:2480
- - C:\Users\Admin\AppData\Local\Temp\52840b21329e395164b93a484e12a024.exe
    "C:\Users\Admin\AppData\Local\Temp\52840b21329e395164b93a484e12a024.exe"
    3⤵
    PID:4276
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /create /tn "dllhost" /sc ONLOGON /tr "'C:\Documents and Settings\dllhost.exe'" /rl HIGHEST /f
      4⤵
      Creates scheduled task(s)
      PID:1640
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /create /tn "TextInputHost" /sc ONLOGON /tr "'C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\InputApp\LayoutData\TextInputHost.exe'" /rl HIGHEST /f
      4⤵
      Creates scheduled task(s)
      PID:2600
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /create /tn "SearchApp" /sc ONLOGON /tr "'C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApi\SearchApp.exe'" /rl HIGHEST /f
      4⤵
      Creates scheduled task(s)
      PID:4408
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /create /tn "OfficeClickToRun" /sc ONLOGON /tr "'C:\Windows\Provisioning\Packages\OfficeClickToRun.exe'" /rl HIGHEST /f
      4⤵
      Creates scheduled task(s)
      PID:4572
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /create /tn "WmiPrvSE" /sc ONLOGON /tr "'C:\Windows\System32\wbem\wmipsess\WmiPrvSE.exe'" /rl HIGHEST /f
      4⤵
      Creates scheduled task(s)
      PID:4016
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /create /tn "sysmon" /sc ONLOGON /tr "'C:\Users\Public\AccountPictures\sysmon.exe'" /rl HIGHEST /f
      4⤵
      Creates scheduled task(s)
      PID:5092
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /create /tn "dllhost" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\dllhost.exe'" /rl HIGHEST /f
      4⤵
      Creates scheduled task(s)
      PID:4996
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /create /tn "smss" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\smss.exe'" /rl HIGHEST /f
      4⤵
      Creates scheduled task(s)
      PID:1488
  - - C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\gmhLSWZDfV.bat"
      4⤵
      PID:1348
    - - C:\Users\Admin\AppData\Local\Temp\52840b21329e395164b93a484e12a024.exe
        
        "C:\Users\Admin\AppData\Local\Temp\52840b21329e395164b93a484e12a024.exe"
        5⤵
        
        PID:2800
      - C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "lsass" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Mail\lsass.exe'" /rl HIGHEST /f
        6⤵
        Creates scheduled task(s)
        
        PID:216
      - C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\RuntimeBroker.exe'" /rl HIGHEST /f
        6⤵
        Creates scheduled task(s)
        
        PID:4976
      - C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "taskhostw" /sc ONLOGON /tr "'C:\Windows\System32\KeyboardSystemToastIcon.contrast-white\taskhostw.exe'" /rl HIGHEST /f
        6⤵
        Creates scheduled task(s)
        
        PID:3312
      - C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "backgroundTaskHost" /sc ONLOGON /tr "'C:\Windows\System32\KBDUSX\backgroundTaskHost.exe'" /rl HIGHEST /f
        6⤵
        Creates scheduled task(s)
        
        PID:2060
      - C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "MoUsoCoreWorker" /sc ONLOGON /tr "'C:\odt\MoUsoCoreWorker.exe'" /rl HIGHEST /f
        6⤵
        Creates scheduled task(s)
        
        PID:4536
      - C:\Windows\System32\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\vYDI8DB00r.bat"
        6⤵
        
        PID:4208
        
        C:\Users\Admin\AppData\Local\Temp\52840b21329e395164b93a484e12a024.exe
        
        "C:\Users\Admin\AppData\Local\Temp\52840b21329e395164b93a484e12a024.exe"
        7⤵
        
        PID:1412
        
        C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "explorer" /sc ONLOGON /tr "'C:\Windows\WindowsUpdate\explorer.exe'" /rl HIGHEST /f
        8⤵
        Creates scheduled task(s)
        
        PID:1136
        
        C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "backgroundTaskHost" /sc ONLOGON /tr "'C:\Windows\System32\wlancfg\backgroundTaskHost.exe'" /rl HIGHEST /f
        8⤵
        Creates scheduled task(s)
        
        PID:2504
        
        C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "backgroundTaskHost" /sc ONLOGON /tr "'C:\PerfLogs\backgroundTaskHost.exe'" /rl HIGHEST /f
        8⤵
        Creates scheduled task(s)
        
        PID:1464
        
        C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "dllhost" /sc ONLOGON /tr "'C:\odt\dllhost.exe'" /rl HIGHEST /f
        8⤵
        Creates scheduled task(s)
        
        PID:2692
        
        C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "MoUsoCoreWorker" /sc ONLOGON /tr "'C:\Windows\System32\winrs\MoUsoCoreWorker.exe'" /rl HIGHEST /f
        8⤵
        Creates scheduled task(s)
        
        PID:2480
        
        C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Windows\System32\MRINFO\RuntimeBroker.exe'" /rl HIGHEST /f
        8⤵
        Creates scheduled task(s)
        
        PID:2668
        
        C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "dllhost" /sc ONLOGON /tr "'C:\Windows\System32\AppXDeploymentClient\dllhost.exe'" /rl HIGHEST /f
        8⤵
        Creates scheduled task(s)
        
        PID:1692
        
        C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "services" /sc ONLOGON /tr "'C:\Windows\CbsTemp\services.exe'" /rl HIGHEST /f
        8⤵
        Creates scheduled task(s)
        
        PID:4352
        
        C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Windows\bcastdvr\RuntimeBroker.exe'" /rl HIGHEST /f
        8⤵
        Creates scheduled task(s)
        
        PID:1156
        
        C:\Windows\System32\AppXDeploymentClient\dllhost.exe
        
        "C:\Windows\System32\AppXDeploymentClient\dllhost.exe"
        8⤵
        
        PID:1580

C:\Windows\system32\PING.EXE
ping -n 5 localhost
1⤵
- Runs ping.exe
PID:4332

C:\Windows\system32\chcp.com
chcp 65001
1⤵
PID:3736

C:\Windows\system32\PING.EXE
ping -n 5 localhost
1⤵
- Runs ping.exe
PID:4496

C:\Windows\system32\chcp.com
chcp 65001
1⤵
PID:4964

C:\Windows\system32\PING.EXE
ping -n 5 localhost
1⤵
- Runs ping.exe
PID:1044

C:\Windows\system32\chcp.com
chcp 65001
1⤵
PID:2720

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

Remote System Discovery

T1018

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

52840b21329e395164b93a484e12a024.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\52840b21329e395164b93a484e12a024.exe.log
Size 1KB
SHA256 96c09cd40aca8463fd210b8b66856d3e38c0a0f7ca54a8b797f97ebca3d4ea63
MD5 29901c9eca42ea66eacb5b816d7dc106
SHA1 69683b3029b7b086002e3cbecced9bf64f031e01
SHA512 e7e17297f9b14b3dae0aa8abf01cffe4353a65fb73b851ced178efb29df858bbacdcf5e75642b9806b4b09dc2eba337cfe28459694911b2f1c4dfdeabab13e0b
MD5 SHA1 SHA512

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Ui7bMzIuXT.bat

Path C:\Users\Admin\AppData\Local\Temp\Ui7bMzIuXT.bat
Size 236B
SHA256 b7f82a1951911b3b57d9920fc5f2e5b4501e88a836073b515b55a6aee9f2e37f
MD5 588792e237c2917be74695dfde60043a
SHA1 a5ff3886bfd291b712d265a64a9426caf34cf43d
SHA512 193b08b7b835d8fb0f881de3c1ce3380ab48eb9c9efc911f326219658bdc6e6a13f04ad0f594b2cf0a797688bd775310a8211039ea78b55c97f4824052b79521
MD5 SHA1 SHA512

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gmhLSWZDfV.bat

Path C:\Users\Admin\AppData\Local\Temp\gmhLSWZDfV.bat
Size 236B
SHA256 c1043f209babfbbd122eab4cb23cfdd897dcf123a6fef1d4cafcb5a58cc26bbc
MD5 261565fd3102ae4a52bf2cfe2cd18f04
SHA1 77997d92855ca9da78571452817da742e6e5eeb1
SHA512 d618eb58b432f07ea31646c7574c23670e00da8df5349aff05d57e77bea1a3829f65a84725bafb2d1080e96977b8285471cb2f7d737972539158884bc5624ba8
MD5 SHA1 SHA512

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vYDI8DB00r.bat

Path C:\Users\Admin\AppData\Local\Temp\vYDI8DB00r.bat
Size 236B
SHA256 0cf061e78bbfce60c759fe59583a14a6d0be70566821771033a94c03606643a9
MD5 8992298aa74f7300c614d82f4aa92a63
SHA1 730f07f6db2261a1bd5a6bf57d28c04bc8568e51
SHA512 c06890b1d9d0c753e604e6bfe9563ac23f67f16e2c585b6fa9b9dbd022fb0ce446eb9aead566d859e3ac27b48e25da5c43e9b7d6c9ac72b901da0dbb9c17e100
MD5 SHA1 SHA512

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dllhost.exe

Path C:\Users\dllhost.exe
Size 57KB
SHA256 c4296a3b0fc6cdd231d962e465ed752b286892621c323fb7c55a808b58c94e78
MD5 e7f837dee8ecfd703aa34007cdfad5d6
SHA1 2f269dd8f4146b5961a3f25106fb9c87ef9355aa
SHA512 a5db657fbb41f792f1ff7a529c24f072f214b1baf17c55389f34ebc1331961db14a9c8820ebf18b59f2dae23291895cdf572a5ef14dca2b869afd702ab73437b
SSDEEP 768:dP8r0XuwBgjgakneiP37enMPDfmcJG4W+b7YgKxUmuLz72QzGf3/rn950xQdZ0+7:dGke+KnMo2sjxOfGt
MD5 SHA1 SHA512 SSDEEP

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dllhost.exe

Path C:\Windows\System32\AppXDeploymentClient\dllhost.exe
Size 248KB
SHA256 09af83b54c06da3dd4bd6242cc2c58783d045847b0da852ffbea1b1365fe18e5
MD5 8cd21fbe0f71c48392c9b0ccfcea2d73
SHA1 eaa47dd8bcf3141aaa8c44756523bc318faad40a
SHA512 e02181ee10d502ecbd3f5ffbf3f2034acbd046ab1301476a0ff9912e37b4d8fbda032ae5ae6f5397391c9091fc3f6d10d503af35b126830898d793c53b2ef16f
SSDEEP 3072:dGwKnh5jGGJZRaAf6a4TGiKFf7mF0NbDL5f3MT/pBCGv47:jGZUACOiKFf7muJ30xBRvO
MD5 SHA1 SHA512 SSDEEP

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dllhost.exe

Path C:\Windows\System32\AppXDeploymentClient\dllhost.exe
Size 294KB
SHA256 8d271f778d84384222764857e7f7b2c8a794c10994d3a44cea7b19c7f470bb1d
MD5 2816fb475e2ecd2157f4231c4ca8a0a5
SHA1 148fdd1303c51767ad73fbb6a159379fd47e16b8
SHA512 3d0dae662e4802f432f99ff9f493d89836bb06bcdf63d6255e4941f2670e8e81704b94c53d28ca7d80993fd8078eda8103423e4342996e29a968a57c4ff91bbf
SSDEEP 3072:dGwKnh5jGGJZRaAf6a4TGiKFf7mF0NbDL5f3MT/pBCGv4kyk+gEgi:jGZUACOiKFf7muJ30xBRv6gi
MD5 SHA1 SHA512 SSDEEP

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memory/488-2-0x00000000029F0000-0x0000000002A00000-memory.dmp

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memory/488-17-0x00007FFDB1890000-0x00007FFDB2351000-memory.dmp

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memory/488-0-0x0000000000750000-0x0000000000864000-memory.dmp

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memory/488-1-0x00007FFDB1890000-0x00007FFDB2351000-memory.dmp

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memory/1412-91-0x00007FFDB0DB0000-0x00007FFDB1871000-memory.dmp

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memory/1412-61-0x00007FFDB0DB0000-0x00007FFDB1871000-memory.dmp

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memory/1412-62-0x00000000019B0000-0x00000000019C0000-memory.dmp

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memory/1580-95-0x00007FFDB0DB0000-0x00007FFDB1871000-memory.dmp

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memory/1580-93-0x000000001B410000-0x000000001B420000-memory.dmp

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memory/1580-92-0x00007FFDB0DB0000-0x00007FFDB1871000-memory.dmp

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memory/2800-60-0x00007FFDB1250000-0x00007FFDB1D11000-memory.dmp

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memory/2800-44-0x0000000000E00000-0x0000000000E10000-memory.dmp

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memory/2800-43-0x00007FFDB1250000-0x00007FFDB1D11000-memory.dmp

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memory/4276-20-0x000000001B0F0000-0x000000001B100000-memory.dmp

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memory/4276-42-0x00007FFDB1300000-0x00007FFDB1DC1000-memory.dmp

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memory/4276-19-0x00007FFDB1300000-0x00007FFDB1DC1000-memory.dmp

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