dcrat | d239fc2c02176544f563b8af3a91751613a9c1e85e36372c49ed132976888259

Analysis

max time kernel
118s
max time network
118s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
11-01-2025 05:19

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General

Target

d239fc2c02176544f563b8af3a91751613a9c1e85e36372c49ed132976888259.exe
Size

828KB
MD5

eba23ee4fa3441dd8972973ac7665007
SHA1

a8416561dd666fbeb01688ea9e17dc2cfae18a24
SHA256

d239fc2c02176544f563b8af3a91751613a9c1e85e36372c49ed132976888259
SHA512

c209b7d8535b5be51dd56fecade2f8ea6b853d48d45877ba9ea708face3031ed01ad85d4ac42a7ffb93568c1f2c58475e8f1fa07f54c5321dd44a5bc8ff53e96
SSDEEP

12288:qTwIZR2pvarT1TZnszQGEfIjvOOK2elbuXH82x7F:iZR2pvmpszQcvOOeYsaF

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 family
dcrat

Process spawned unexpected child process 27 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

description	pid	pid_target	Process	procid_target
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2312	2540	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2848	2540	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2948	2540	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2588	2540	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2836	2540	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2820	2540	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2344	2540	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2944	2540	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2868	2540	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2972	2540	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2700	2540	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2776	2540	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1960	2540	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2144	2540	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1824	2540	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1508	2540	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1492	2540	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1532	2540	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2928	2540	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3000	2540	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3036	2540	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2172	2540	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2192	2540	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2336	2540	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	796	2540	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1884	2540	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2804	2540	schtasks.exe	30

DCRat payload 3 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/memory/1980-1-0x0000000000B70000-0x0000000000C46000-memory.dmp	dcrat
behavioral1/files/0x000500000001a41a-11.dat	dcrat
behavioral1/memory/1168-29-0x00000000003B0000-0x0000000000486000-memory.dmp	dcrat

Executes dropped EXE 1 IoCs

pid	Process
1168	OSPPSVC.exe

Drops file in Program Files directory 8 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Uninstall Information\1610b97d3ab4a7	d239fc2c02176544f563b8af3a91751613a9c1e85e36372c49ed132976888259.exe
File created	C:\Program Files\Windows Media Player\csrss.exe	d239fc2c02176544f563b8af3a91751613a9c1e85e36372c49ed132976888259.exe
File created	C:\Program Files\Windows Media Player\886983d96e3d3e	d239fc2c02176544f563b8af3a91751613a9c1e85e36372c49ed132976888259.exe
File created	C:\Program Files\Common Files\smss.exe	d239fc2c02176544f563b8af3a91751613a9c1e85e36372c49ed132976888259.exe
File created	C:\Program Files\Common Files\69ddcba757bf72	d239fc2c02176544f563b8af3a91751613a9c1e85e36372c49ed132976888259.exe
File created	C:\Program Files\Common Files\Microsoft Shared\TextConv\lsm.exe	d239fc2c02176544f563b8af3a91751613a9c1e85e36372c49ed132976888259.exe
File created	C:\Program Files\Common Files\Microsoft Shared\TextConv\101b941d020240	d239fc2c02176544f563b8af3a91751613a9c1e85e36372c49ed132976888259.exe
File created	C:\Program Files (x86)\Uninstall Information\OSPPSVC.exe	d239fc2c02176544f563b8af3a91751613a9c1e85e36372c49ed132976888259.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\Branding\ShellBrd\Idle.exe	d239fc2c02176544f563b8af3a91751613a9c1e85e36372c49ed132976888259.exe
File created	C:\Windows\Branding\ShellBrd\6ccacd8608530f	d239fc2c02176544f563b8af3a91751613a9c1e85e36372c49ed132976888259.exe

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

System Information Discovery
T1082

Scheduled Task/Job: Scheduled Task 1 TTPs 27 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
1508	schtasks.exe
1824	schtasks.exe
1960	schtasks.exe
2948	schtasks.exe
2820	schtasks.exe
3036	schtasks.exe
2172	schtasks.exe
2944	schtasks.exe
2144	schtasks.exe
2804	schtasks.exe
2344	schtasks.exe
1492	schtasks.exe
796	schtasks.exe
2972	schtasks.exe
1532	schtasks.exe
2192	schtasks.exe
2336	schtasks.exe
2848	schtasks.exe
2868	schtasks.exe
2700	schtasks.exe
2776	schtasks.exe
3000	schtasks.exe
2836	schtasks.exe
1884	schtasks.exe
2588	schtasks.exe
2928	schtasks.exe
2312	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1980	d239fc2c02176544f563b8af3a91751613a9c1e85e36372c49ed132976888259.exe
1980	d239fc2c02176544f563b8af3a91751613a9c1e85e36372c49ed132976888259.exe
1980	d239fc2c02176544f563b8af3a91751613a9c1e85e36372c49ed132976888259.exe
1980	d239fc2c02176544f563b8af3a91751613a9c1e85e36372c49ed132976888259.exe
1980	d239fc2c02176544f563b8af3a91751613a9c1e85e36372c49ed132976888259.exe
1168	OSPPSVC.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1980	d239fc2c02176544f563b8af3a91751613a9c1e85e36372c49ed132976888259.exe
Token: SeDebugPrivilege	1168	OSPPSVC.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1980 wrote to memory of 2464	1980	d239fc2c02176544f563b8af3a91751613a9c1e85e36372c49ed132976888259.exe	58
PID 1980 wrote to memory of 2464	1980	d239fc2c02176544f563b8af3a91751613a9c1e85e36372c49ed132976888259.exe	58
PID 1980 wrote to memory of 2464	1980	d239fc2c02176544f563b8af3a91751613a9c1e85e36372c49ed132976888259.exe	58
PID 2464 wrote to memory of 2104	2464	cmd.exe	60
PID 2464 wrote to memory of 2104	2464	cmd.exe	60
PID 2464 wrote to memory of 2104	2464	cmd.exe	60
PID 2464 wrote to memory of 1168	2464	cmd.exe	61
PID 2464 wrote to memory of 1168	2464	cmd.exe	61
PID 2464 wrote to memory of 1168	2464	cmd.exe	61

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\d239fc2c02176544f563b8af3a91751613a9c1e85e36372c49ed132976888259.exe
"C:\Users\Admin\AppData\Local\Temp\d239fc2c02176544f563b8af3a91751613a9c1e85e36372c49ed132976888259.exe"
1⤵
- Drops file in Program Files directory
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1980
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\OzjuDajDRK.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2464
- - C:\Windows\system32\w32tm.exe
    w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
    3⤵
    PID:2104
- - C:\Program Files (x86)\Uninstall Information\OSPPSVC.exe
    "C:\Program Files (x86)\Uninstall Information\OSPPSVC.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1168

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smsss" /sc MINUTE /mo 8 /tr "'C:\Recovery\f6a14ac2-8725-11ef-a9ab-dab21757c799\smss.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2312

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Recovery\f6a14ac2-8725-11ef-a9ab-dab21757c799\smss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2848

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smsss" /sc MINUTE /mo 6 /tr "'C:\Recovery\f6a14ac2-8725-11ef-a9ab-dab21757c799\smss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2948

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 11 /tr "'C:\Program Files\Windows Media Player\csrss.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2588

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Program Files\Windows Media Player\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2836

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 5 /tr "'C:\Program Files\Windows Media Player\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2820

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "audiodga" /sc MINUTE /mo 8 /tr "'C:\Users\Default User\audiodg.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2344

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "audiodg" /sc ONLOGON /tr "'C:\Users\Default User\audiodg.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2944

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "audiodga" /sc MINUTE /mo 14 /tr "'C:\Users\Default User\audiodg.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2868

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smsss" /sc MINUTE /mo 6 /tr "'C:\Program Files\Common Files\smss.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2972

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Program Files\Common Files\smss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2700

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smsss" /sc MINUTE /mo 10 /tr "'C:\Program Files\Common Files\smss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2776

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 8 /tr "'C:\Windows\Branding\ShellBrd\Idle.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1960

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\Windows\Branding\ShellBrd\Idle.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2144

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 12 /tr "'C:\Windows\Branding\ShellBrd\Idle.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1824

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsml" /sc MINUTE /mo 5 /tr "'C:\Program Files\Common Files\Microsoft Shared\TextConv\lsm.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1508

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsm" /sc ONLOGON /tr "'C:\Program Files\Common Files\Microsoft Shared\TextConv\lsm.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1492

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsml" /sc MINUTE /mo 12 /tr "'C:\Program Files\Common Files\Microsoft Shared\TextConv\lsm.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1532

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WmiPrvSEW" /sc MINUTE /mo 13 /tr "'C:\MSOCache\All Users\{90140000-0117-0409-0000-0000000FF1CE}-C\Access.en-us\WmiPrvSE.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2928

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WmiPrvSE" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-0117-0409-0000-0000000FF1CE}-C\Access.en-us\WmiPrvSE.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3000

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WmiPrvSEW" /sc MINUTE /mo 10 /tr "'C:\MSOCache\All Users\{90140000-0117-0409-0000-0000000FF1CE}-C\Access.en-us\WmiPrvSE.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3036

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "OSPPSVCO" /sc MINUTE /mo 10 /tr "'C:\Program Files (x86)\Uninstall Information\OSPPSVC.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2172

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "OSPPSVC" /sc ONLOGON /tr "'C:\Program Files (x86)\Uninstall Information\OSPPSVC.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2192

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "OSPPSVCO" /sc MINUTE /mo 8 /tr "'C:\Program Files (x86)\Uninstall Information\OSPPSVC.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2336

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 5 /tr "'C:\Users\All Users\Favorites\Idle.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:796

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\Users\All Users\Favorites\Idle.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1884

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 13 /tr "'C:\Users\All Users\Favorites\Idle.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2804

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\OzjuDajDRK.bat

Filesize
221B

MD5
7ab8c2d0afb809c808dd1da358b6d8a7

SHA1
816c6403cd05357385cad582f66bf15318204e68

SHA256
9e059ce9702b52738758acab8e9af2d1215fab088255a19204bd8d3e469c5e7c

SHA512
139b4be721d012663e4d91e75df1faca7b79119bc91d2a7ea884336880e11bf2ef0a25737149554f6dec4f241e757b21ea692dbed558c4b4791a62f9c42ac28d

Download Submit
C:\Windows\Branding\ShellBrd\Idle.exe

Filesize
828KB

MD5
eba23ee4fa3441dd8972973ac7665007

SHA1
a8416561dd666fbeb01688ea9e17dc2cfae18a24

SHA256
d239fc2c02176544f563b8af3a91751613a9c1e85e36372c49ed132976888259

SHA512
c209b7d8535b5be51dd56fecade2f8ea6b853d48d45877ba9ea708face3031ed01ad85d4ac42a7ffb93568c1f2c58475e8f1fa07f54c5321dd44a5bc8ff53e96

Download Submit
memory/1168-29-0x00000000003B0000-0x0000000000486000-memory.dmp

Filesize
856KB

Download
memory/1980-0-0x000007FEF5C83000-0x000007FEF5C84000-memory.dmp

Filesize
4KB

Download
memory/1980-1-0x0000000000B70000-0x0000000000C46000-memory.dmp

Filesize
856KB

Download
memory/1980-2-0x000007FEF5C80000-0x000007FEF666C000-memory.dmp

Filesize
9.9MB

Download
memory/1980-25-0x000007FEF5C80000-0x000007FEF666C000-memory.dmp

Filesize
9.9MB

Download