dcrat | a22e4b92ef53c22a69ef02fa17403fcdf74d3c4b3efc8d28604040286f4cdedf

General

Target

a22e4b92ef53c22a69ef02fa17403fcdf74d3c4b3efc8d28604040286f4cdedf.exe
Size

827KB
MD5

50887c3ed5676401f9cab09d742bbce4
SHA1

1e4016e50cffe51614df5a31817d50de7b85af26
SHA256

a22e4b92ef53c22a69ef02fa17403fcdf74d3c4b3efc8d28604040286f4cdedf
SHA512

bd8ec53d02ba47c8656c4260d2112f50755526898b681d1affbd50a6bdda69f01fa78d091ff812d3a25454afd03eca815fea7b869f037b4f492b1d188f376ab2
SSDEEP

12288:2NultHBphsl8LvoS8wXO0DzXLYFlTvyk31:ZHBp+ovohwDeTv131

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 18 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	3044	2372	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2364	2372	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2052	2372	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2060	2372	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2084	2372	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1604	2372	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2664	2372	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2992	2372	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2948	2372	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2704	2372	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2756	2372	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2808	2372	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2956	2372	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2760	2372	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2660	2372	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2656	2372	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2536	2372	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2500	2372	schtasks.exe	28

DCRat payload 3 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/memory/2908-1-0x0000000000160000-0x0000000000236000-memory.dmp	dcrat
behavioral1/files/0x0007000000018687-11.dat	dcrat
behavioral1/memory/1924-23-0x0000000000840000-0x0000000000916000-memory.dmp	dcrat

Executes dropped EXE 1 IoCs

pid	Process
1924	Idle.exe

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Uninstall Information\spoolsv.exe	a22e4b92ef53c22a69ef02fa17403fcdf74d3c4b3efc8d28604040286f4cdedf.exe
File created	C:\Program Files (x86)\Uninstall Information\f3b6ecef712a24	a22e4b92ef53c22a69ef02fa17403fcdf74d3c4b3efc8d28604040286f4cdedf.exe
File created	C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\csrss.exe	a22e4b92ef53c22a69ef02fa17403fcdf74d3c4b3efc8d28604040286f4cdedf.exe
File created	C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\886983d96e3d3e	a22e4b92ef53c22a69ef02fa17403fcdf74d3c4b3efc8d28604040286f4cdedf.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 18 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
2948	schtasks.exe
2500	schtasks.exe
3044	schtasks.exe
2060	schtasks.exe
2664	schtasks.exe
2992	schtasks.exe
2052	schtasks.exe
2084	schtasks.exe
2660	schtasks.exe
2760	schtasks.exe
2656	schtasks.exe
1604	schtasks.exe
2704	schtasks.exe
2808	schtasks.exe
2956	schtasks.exe
2364	schtasks.exe
2756	schtasks.exe
2536	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2908	a22e4b92ef53c22a69ef02fa17403fcdf74d3c4b3efc8d28604040286f4cdedf.exe
1924	Idle.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2908	a22e4b92ef53c22a69ef02fa17403fcdf74d3c4b3efc8d28604040286f4cdedf.exe
Token: SeDebugPrivilege	1924	Idle.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2908 wrote to memory of 2748	2908	a22e4b92ef53c22a69ef02fa17403fcdf74d3c4b3efc8d28604040286f4cdedf.exe	47
PID 2908 wrote to memory of 2748	2908	a22e4b92ef53c22a69ef02fa17403fcdf74d3c4b3efc8d28604040286f4cdedf.exe	47
PID 2908 wrote to memory of 2748	2908	a22e4b92ef53c22a69ef02fa17403fcdf74d3c4b3efc8d28604040286f4cdedf.exe	47
PID 2748 wrote to memory of 1380	2748	cmd.exe	49
PID 2748 wrote to memory of 1380	2748	cmd.exe	49
PID 2748 wrote to memory of 1380	2748	cmd.exe	49
PID 2748 wrote to memory of 1924	2748	cmd.exe	50
PID 2748 wrote to memory of 1924	2748	cmd.exe	50
PID 2748 wrote to memory of 1924	2748	cmd.exe	50

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\a22e4b92ef53c22a69ef02fa17403fcdf74d3c4b3efc8d28604040286f4cdedf.exe
"C:\Users\Admin\AppData\Local\Temp\a22e4b92ef53c22a69ef02fa17403fcdf74d3c4b3efc8d28604040286f4cdedf.exe"
1⤵
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2908
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\vY3w7treqw.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2748
- - C:\Windows\system32\w32tm.exe
    w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
    3⤵
    PID:1380
- - C:\MSOCache\All Users\{90140000-0044-0409-0000-0000000FF1CE}-C\Idle.exe
    "C:\MSOCache\All Users\{90140000-0044-0409-0000-0000000FF1CE}-C\Idle.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1924

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 8 /tr "'C:\MSOCache\All Users\{90140000-0044-0409-0000-0000000FF1CE}-C\Idle.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3044

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-0044-0409-0000-0000000FF1CE}-C\Idle.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2364

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 14 /tr "'C:\MSOCache\All Users\{90140000-0044-0409-0000-0000000FF1CE}-C\Idle.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2052

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "audiodga" /sc MINUTE /mo 13 /tr "'C:\MSOCache\All Users\{90140000-0044-0409-0000-0000000FF1CE}-C\audiodg.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2060

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "audiodg" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-0044-0409-0000-0000000FF1CE}-C\audiodg.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2084

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "audiodga" /sc MINUTE /mo 11 /tr "'C:\MSOCache\All Users\{90140000-0044-0409-0000-0000000FF1CE}-C\audiodg.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1604

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 9 /tr "'C:\MSOCache\All Users\{90140000-0016-0409-0000-0000000FF1CE}-C\System.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2664

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "System" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-0016-0409-0000-0000000FF1CE}-C\System.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2992

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 5 /tr "'C:\MSOCache\All Users\{90140000-0016-0409-0000-0000000FF1CE}-C\System.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 "spoolsvs" /sc MINUTE /mo 11 /tr "'C:\Program Files (x86)\Uninstall Information\spoolsv.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2704

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Program Files (x86)\Uninstall Information\spoolsv.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2756

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 14 /tr "'C:\Program Files (x86)\Uninstall Information\spoolsv.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2808

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 10 /tr "'C:\Users\Public\spoolsv.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2956

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Users\Public\spoolsv.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2760

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 8 /tr "'C:\Users\Public\spoolsv.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2660

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 5 /tr "'C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\csrss.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2656

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2536

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 12 /tr "'C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2500

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\vY3w7treqw.bat

Filesize
236B

MD5
3f8eae45d46c67ae28c11100f52f1fbc

SHA1
027fd1cfbc4b0180f29297e7df9c8d2afbbec94c

SHA256
66ca2c827ce6f2633fe5a1b6605d2382eade142b4ebbf62c4bfac223953d7c64

SHA512
fde32f2c1dce9f3b0e030f6378d4cc1d2f2f543183b1786652b1b00fbe5a91d65024d7021bcc532d4022309ad73add2538a13dcf213b5b9cc78019e37893ccc5

Download Submit
C:\Users\Public\spoolsv.exe

Filesize
827KB

MD5
50887c3ed5676401f9cab09d742bbce4

SHA1
1e4016e50cffe51614df5a31817d50de7b85af26

SHA256
a22e4b92ef53c22a69ef02fa17403fcdf74d3c4b3efc8d28604040286f4cdedf

SHA512
bd8ec53d02ba47c8656c4260d2112f50755526898b681d1affbd50a6bdda69f01fa78d091ff812d3a25454afd03eca815fea7b869f037b4f492b1d188f376ab2

Download Submit
memory/1924-23-0x0000000000840000-0x0000000000916000-memory.dmp

Filesize
856KB

Download
memory/2908-0-0x000007FEF56D3000-0x000007FEF56D4000-memory.dmp

Filesize
4KB

Download
memory/2908-1-0x0000000000160000-0x0000000000236000-memory.dmp

Filesize
856KB

Download
memory/2908-2-0x000007FEF56D0000-0x000007FEF60BC000-memory.dmp

Filesize
9.9MB

Download
memory/2908-19-0x000007FEF56D0000-0x000007FEF60BC000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads