dcrat | bc3f7e752971227983d7c0eec18816ae2dbdd4444ddc26dec020159f11ff640f

General

Target

bc3f7e752971227983d7c0eec18816ae2dbdd4444ddc26dec020159f11ff640f.exe
Size

828KB
MD5

2f9ff2f250a639e72310b4ebc02054d7
SHA1

ddaa6f6ce1729f7cb390e89a91c200dc11aec4d0
SHA256

bc3f7e752971227983d7c0eec18816ae2dbdd4444ddc26dec020159f11ff640f
SHA512

7920a80dead2c84e7348813eb344bba991634a71c9f4d1089e555d4f02173bb96529bac8365319da821ed473ca5fb5733a19be756951077e7af5c782f4b41256
SSDEEP

12288:TviNmUgaxKEQo+Hg5GHYv63A26CLjNh6lSS3zRNJm8nZfN:Tv+DrsEQxgIHYv6wfah6lJjRuan

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 9 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	1888	1984	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2764	1984	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2824	1984	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3004	1984	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3000	1984	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1904	1984	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2812	1984	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2884	1984	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2784	1984	schtasks.exe	30

DCRat payload 3 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/memory/2528-1-0x0000000001010000-0x00000000010E6000-memory.dmp	dcrat
behavioral1/files/0x0008000000016d31-16.dat	dcrat
behavioral1/memory/1852-17-0x00000000001D0000-0x00000000002A6000-memory.dmp	dcrat

Executes dropped EXE 1 IoCs

pid	Process
1852	sppsvc.exe

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Program Files\Windows Defender\it-IT\audiodg.exe	bc3f7e752971227983d7c0eec18816ae2dbdd4444ddc26dec020159f11ff640f.exe
File created	C:\Program Files\Windows Defender\it-IT\42af1c969fbb7b	bc3f7e752971227983d7c0eec18816ae2dbdd4444ddc26dec020159f11ff640f.exe
File created	C:\Program Files\Windows Defender\it-IT\audiodg.exe	bc3f7e752971227983d7c0eec18816ae2dbdd4444ddc26dec020159f11ff640f.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\PolicyDefinitions\fr-FR\0a1fd5f707cd16	bc3f7e752971227983d7c0eec18816ae2dbdd4444ddc26dec020159f11ff640f.exe
File created	C:\Windows\PolicyDefinitions\fr-FR\sppsvc.exe	bc3f7e752971227983d7c0eec18816ae2dbdd4444ddc26dec020159f11ff640f.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 9 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
1888	schtasks.exe
2824	schtasks.exe
3004	schtasks.exe
3000	schtasks.exe
2812	schtasks.exe
2764	schtasks.exe
1904	schtasks.exe
2884	schtasks.exe
2784	schtasks.exe

Suspicious behavior: CmdExeWriteProcessMemorySpam 1 IoCs

pid	Process
1852	sppsvc.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2528	bc3f7e752971227983d7c0eec18816ae2dbdd4444ddc26dec020159f11ff640f.exe
1852	sppsvc.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2528	bc3f7e752971227983d7c0eec18816ae2dbdd4444ddc26dec020159f11ff640f.exe
Token: SeDebugPrivilege	1852	sppsvc.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2528 wrote to memory of 2632	2528	bc3f7e752971227983d7c0eec18816ae2dbdd4444ddc26dec020159f11ff640f.exe	40
PID 2528 wrote to memory of 2632	2528	bc3f7e752971227983d7c0eec18816ae2dbdd4444ddc26dec020159f11ff640f.exe	40
PID 2528 wrote to memory of 2632	2528	bc3f7e752971227983d7c0eec18816ae2dbdd4444ddc26dec020159f11ff640f.exe	40
PID 2632 wrote to memory of 2740	2632	cmd.exe	42
PID 2632 wrote to memory of 2740	2632	cmd.exe	42
PID 2632 wrote to memory of 2740	2632	cmd.exe	42
PID 2632 wrote to memory of 1852	2632	cmd.exe	43
PID 2632 wrote to memory of 1852	2632	cmd.exe	43
PID 2632 wrote to memory of 1852	2632	cmd.exe	43
PID 2632 wrote to memory of 1852	2632	cmd.exe	43
PID 2632 wrote to memory of 1852	2632	cmd.exe	43

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\bc3f7e752971227983d7c0eec18816ae2dbdd4444ddc26dec020159f11ff640f.exe
"C:\Users\Admin\AppData\Local\Temp\bc3f7e752971227983d7c0eec18816ae2dbdd4444ddc26dec020159f11ff640f.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:2528
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\r2XKqKAXvE.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2632
- - C:\Windows\system32\w32tm.exe
    w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
    3⤵
    PID:2740
- - C:\Windows\PolicyDefinitions\fr-FR\sppsvc.exe
    "C:\Windows\PolicyDefinitions\fr-FR\sppsvc.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: CmdExeWriteProcessMemorySpam
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1852

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "audiodga" /sc MINUTE /mo 14 /tr "'C:\Program Files\Windows Defender\it-IT\audiodg.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1888

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "audiodg" /sc ONLOGON /tr "'C:\Program Files\Windows Defender\it-IT\audiodg.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2764

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "audiodga" /sc MINUTE /mo 8 /tr "'C:\Program Files\Windows Defender\it-IT\audiodg.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2824

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 14 /tr "'C:\Windows\PolicyDefinitions\fr-FR\sppsvc.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3004

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sppsvc" /sc ONLOGON /tr "'C:\Windows\PolicyDefinitions\fr-FR\sppsvc.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 "sppsvcs" /sc MINUTE /mo 12 /tr "'C:\Windows\PolicyDefinitions\fr-FR\sppsvc.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1904

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 12 /tr "'C:\Users\Default User\dllhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2812

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Users\Default User\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2884

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 14 /tr "'C:\Users\Default User\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2784

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\r2XKqKAXvE.bat

Filesize
210B

MD5
6a47a2e2ede76df0701a76203686c0fc

SHA1
7f84ec7d42d7403924470ba98b9835c0bcce369c

SHA256
2f5f0536a3c0e15cd2b31cb7a54db2977d74317247e2eaf6f00a5f9d42a56358

SHA512
bb1163bd0e992e55bcb0830e6177a6735092d1fd494d3bb4b2108e3c97c8f3367de421c7badb177d96a0b11b6cb23213301c5d7dfe5dde9363bdfcf7cf2fe902

Download Submit
C:\Windows\PolicyDefinitions\fr-FR\sppsvc.exe

Filesize
828KB

MD5
2f9ff2f250a639e72310b4ebc02054d7

SHA1
ddaa6f6ce1729f7cb390e89a91c200dc11aec4d0

SHA256
bc3f7e752971227983d7c0eec18816ae2dbdd4444ddc26dec020159f11ff640f

SHA512
7920a80dead2c84e7348813eb344bba991634a71c9f4d1089e555d4f02173bb96529bac8365319da821ed473ca5fb5733a19be756951077e7af5c782f4b41256

Download Submit
memory/1852-17-0x00000000001D0000-0x00000000002A6000-memory.dmp

Filesize
856KB

Download
memory/2528-0-0x000007FEF5DA3000-0x000007FEF5DA4000-memory.dmp

Filesize
4KB

Download
memory/2528-1-0x0000000001010000-0x00000000010E6000-memory.dmp

Filesize
856KB

Download
memory/2528-2-0x000007FEF5DA0000-0x000007FEF678C000-memory.dmp

Filesize
9.9MB

Download
memory/2528-14-0x000007FEF5DA0000-0x000007FEF678C000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads