dcrat | ba3402759b71df5f82271b3311fb3229a9ef08298178dd63edd8dea842b42798

Analysis

max time kernel
121s
max time network
122s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
06-11-2024 08:31

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General

Target

5c46eb00a3f517f8a1bddda0d44ef6f1.exe
Size

1.1MB
MD5

5c46eb00a3f517f8a1bddda0d44ef6f1
SHA1

716a518ec7c084161bfc2d7f212c1196e9a3159f
SHA256

ba3402759b71df5f82271b3311fb3229a9ef08298178dd63edd8dea842b42798
SHA512

8fb50b833a3ce919bc4fcbc06214adf68dc8e7a0c967b729958ac002973159078507b03defc2055522aaa38e46cbf953a75dc669c463b33f54a8feb802b7364e
SSDEEP

24576:0hBpEOYFciGLT5KIM+K1BVRSO6lGd4LmujFS9jF:0hXEtcKp+mVRxMGd+Hjw

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	2800	2960	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2688	2960	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2564	2960	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2568	2960	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2584	2960	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2540	2960	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2648	2960	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2580	2960	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2308	2960	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2280	2960	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1916	2960	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1084	2960	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1176	2960	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2740	2960	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2984	2960	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1920	2960	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1824	2960	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1204	2960	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2708	2960	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2752	2960	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2892	2960	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1604	2960	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1556	2960	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2132	2960	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1848	2960	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	588	2960	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1412	2960	schtasks.exe	30

DCRat payload 3 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/memory/2620-1-0x0000000000320000-0x0000000000446000-memory.dmp	dcrat
behavioral1/files/0x00060000000190cd-13.dat	dcrat
behavioral1/memory/2220-31-0x00000000011E0000-0x0000000001306000-memory.dmp	dcrat

Executes dropped EXE 1 IoCs

pid	Process
2220	OSPPSVC.exe

Drops file in Program Files directory 7 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Microsoft Analysis Services\AS OLEDB\56085415360792	5c46eb00a3f517f8a1bddda0d44ef6f1.exe
File created	C:\Program Files\Microsoft Games\Purble Place\OSPPSVC.exe	5c46eb00a3f517f8a1bddda0d44ef6f1.exe
File opened for modification	C:\Program Files\Microsoft Games\Purble Place\OSPPSVC.exe	5c46eb00a3f517f8a1bddda0d44ef6f1.exe
File created	C:\Program Files\Microsoft Games\Purble Place\1610b97d3ab4a7	5c46eb00a3f517f8a1bddda0d44ef6f1.exe
File created	C:\Program Files (x86)\Common Files\Adobe AIR\csrss.exe	5c46eb00a3f517f8a1bddda0d44ef6f1.exe
File created	C:\Program Files (x86)\Common Files\Adobe AIR\886983d96e3d3e	5c46eb00a3f517f8a1bddda0d44ef6f1.exe
File created	C:\Program Files (x86)\Microsoft Analysis Services\AS OLEDB\wininit.exe	5c46eb00a3f517f8a1bddda0d44ef6f1.exe

Drops file in Windows directory 4 IoCs

description	ioc	Process
File created	C:\Windows\Vss\Writers\5940a34987c991	5c46eb00a3f517f8a1bddda0d44ef6f1.exe
File created	C:\Windows\Prefetch\ReadyBoot\dwm.exe	5c46eb00a3f517f8a1bddda0d44ef6f1.exe
File created	C:\Windows\Prefetch\ReadyBoot\6cb0b6c459d5d3	5c46eb00a3f517f8a1bddda0d44ef6f1.exe
File created	C:\Windows\Vss\Writers\dllhost.exe	5c46eb00a3f517f8a1bddda0d44ef6f1.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
1084	schtasks.exe
1204	schtasks.exe
2752	schtasks.exe
1556	schtasks.exe
2580	schtasks.exe
1916	schtasks.exe
2984	schtasks.exe
2688	schtasks.exe
2648	schtasks.exe
1848	schtasks.exe
2564	schtasks.exe
1176	schtasks.exe
1920	schtasks.exe
2132	schtasks.exe
2568	schtasks.exe
2540	schtasks.exe
1604	schtasks.exe
588	schtasks.exe
2280	schtasks.exe
2740	schtasks.exe
1824	schtasks.exe
2708	schtasks.exe
2584	schtasks.exe
2308	schtasks.exe
2800	schtasks.exe
2892	schtasks.exe
1412	schtasks.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
2620	5c46eb00a3f517f8a1bddda0d44ef6f1.exe
2620	5c46eb00a3f517f8a1bddda0d44ef6f1.exe
2620	5c46eb00a3f517f8a1bddda0d44ef6f1.exe
2620	5c46eb00a3f517f8a1bddda0d44ef6f1.exe
2620	5c46eb00a3f517f8a1bddda0d44ef6f1.exe
2620	5c46eb00a3f517f8a1bddda0d44ef6f1.exe
2620	5c46eb00a3f517f8a1bddda0d44ef6f1.exe
2220	OSPPSVC.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2620	5c46eb00a3f517f8a1bddda0d44ef6f1.exe
Token: SeDebugPrivilege	2220	OSPPSVC.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2620 wrote to memory of 2340	2620	5c46eb00a3f517f8a1bddda0d44ef6f1.exe	58
PID 2620 wrote to memory of 2340	2620	5c46eb00a3f517f8a1bddda0d44ef6f1.exe	58
PID 2620 wrote to memory of 2340	2620	5c46eb00a3f517f8a1bddda0d44ef6f1.exe	58
PID 2340 wrote to memory of 2168	2340	cmd.exe	60
PID 2340 wrote to memory of 2168	2340	cmd.exe	60
PID 2340 wrote to memory of 2168	2340	cmd.exe	60
PID 2340 wrote to memory of 2220	2340	cmd.exe	61
PID 2340 wrote to memory of 2220	2340	cmd.exe	61
PID 2340 wrote to memory of 2220	2340	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\5c46eb00a3f517f8a1bddda0d44ef6f1.exe
"C:\Users\Admin\AppData\Local\Temp\5c46eb00a3f517f8a1bddda0d44ef6f1.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:2620
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\fai79tGDnZ.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2340
- - C:\Windows\system32\w32tm.exe
    w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
    3⤵
    PID:2168
- - C:\Program Files\Microsoft Games\Purble Place\OSPPSVC.exe
    "C:\Program Files\Microsoft Games\Purble Place\OSPPSVC.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2220

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "OSPPSVCO" /sc MINUTE /mo 11 /tr "'C:\Program Files\Microsoft Games\Purble Place\OSPPSVC.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2800

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "OSPPSVC" /sc ONLOGON /tr "'C:\Program Files\Microsoft Games\Purble Place\OSPPSVC.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2688

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "OSPPSVCO" /sc MINUTE /mo 14 /tr "'C:\Program Files\Microsoft Games\Purble Place\OSPPSVC.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2564

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 6 /tr "'C:\Program Files (x86)\Common Files\Adobe AIR\csrss.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2568

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Program Files (x86)\Common Files\Adobe AIR\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2584

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 8 /tr "'C:\Program Files (x86)\Common Files\Adobe AIR\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2540

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 9 /tr "'C:\Windows\Prefetch\ReadyBoot\dwm.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2648

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dwm" /sc ONLOGON /tr "'C:\Windows\Prefetch\ReadyBoot\dwm.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2580

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 9 /tr "'C:\Windows\Prefetch\ReadyBoot\dwm.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2308

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 8 /tr "'C:\Recovery\1f276ee2-69f6-11ef-8b31-62cb582c238c\wininit.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2280

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Recovery\1f276ee2-69f6-11ef-8b31-62cb582c238c\wininit.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1916

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 14 /tr "'C:\Recovery\1f276ee2-69f6-11ef-8b31-62cb582c238c\wininit.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1084

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 14 /tr "'C:\Recovery\1f276ee2-69f6-11ef-8b31-62cb582c238c\spoolsv.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1176

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Recovery\1f276ee2-69f6-11ef-8b31-62cb582c238c\spoolsv.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2740

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 9 /tr "'C:\Recovery\1f276ee2-69f6-11ef-8b31-62cb582c238c\spoolsv.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2984

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "5c46eb00a3f517f8a1bddda0d44ef6f15" /sc MINUTE /mo 13 /tr "'C:\MSOCache\All Users\5c46eb00a3f517f8a1bddda0d44ef6f1.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1920

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "5c46eb00a3f517f8a1bddda0d44ef6f1" /sc ONLOGON /tr "'C:\MSOCache\All Users\5c46eb00a3f517f8a1bddda0d44ef6f1.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 "5c46eb00a3f517f8a1bddda0d44ef6f15" /sc MINUTE /mo 14 /tr "'C:\MSOCache\All Users\5c46eb00a3f517f8a1bddda0d44ef6f1.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1204

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 5 /tr "'C:\Program Files (x86)\Microsoft Analysis Services\AS OLEDB\wininit.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2708

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Program Files (x86)\Microsoft Analysis Services\AS OLEDB\wininit.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2752

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 12 /tr "'C:\Program Files (x86)\Microsoft Analysis Services\AS OLEDB\wininit.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2892

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 5 /tr "'C:\Windows\Vss\Writers\dllhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1604

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Windows\Vss\Writers\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1556

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 9 /tr "'C:\Windows\Vss\Writers\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2132

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 14 /tr "'C:\Users\All Users\Application Data\taskhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1848

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhost" /sc ONLOGON /tr "'C:\Users\All Users\Application Data\taskhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:588

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 9 /tr "'C:\Users\All Users\Application Data\taskhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1412

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:\Recovery\1f276ee2-69f6-11ef-8b31-62cb582c238c\spoolsv.exe

Filesize
1.1MB

MD5
5c46eb00a3f517f8a1bddda0d44ef6f1

SHA1
716a518ec7c084161bfc2d7f212c1196e9a3159f

SHA256
ba3402759b71df5f82271b3311fb3229a9ef08298178dd63edd8dea842b42798

SHA512
8fb50b833a3ce919bc4fcbc06214adf68dc8e7a0c967b729958ac002973159078507b03defc2055522aaa38e46cbf953a75dc669c463b33f54a8feb802b7364e

Download Submit
C:\Users\Admin\AppData\Local\Temp\fai79tGDnZ.bat

Filesize
222B

MD5
c957b7ca073aa45cedda9e3351cecb53

SHA1
e04c4580ed4c57ec60373c3e9468fc8ffa8aec39

SHA256
71bcf3a786500669b9aa642898114da7259e793d8e46d6b1fd0ca9c8088601dd

SHA512
623ce0ae580ccd4a87f7c0b775d5a8c2aad6afa17853c71cf746326af47be54121ad057f6d4ed06ce287d1083eec0b3014f91e42c431f189993451cf12c9e84b

Download Submit
memory/2220-31-0x00000000011E0000-0x0000000001306000-memory.dmp

Filesize
1.1MB

Download
memory/2620-0-0x000007FEF6473000-0x000007FEF6474000-memory.dmp

Filesize
4KB

Download
memory/2620-1-0x0000000000320000-0x0000000000446000-memory.dmp

Filesize
1.1MB

Download
memory/2620-2-0x000007FEF6470000-0x000007FEF6E5C000-memory.dmp

Filesize
9.9MB

Download
memory/2620-3-0x0000000000140000-0x000000000015C000-memory.dmp

Filesize
112KB

Download
memory/2620-4-0x0000000000160000-0x0000000000176000-memory.dmp

Filesize
88KB

Download
memory/2620-27-0x000007FEF6470000-0x000007FEF6E5C000-memory.dmp

Filesize
9.9MB

Download