dcrat | 05b123c99c5736a62f1cfd6bc6a9335a533849fe663d875d20ece0caca82e077

General

Target

05b123c99c5736a62f1cfd6bc6a9335a533849fe663d875d20ece0caca82e077.exe
Size

828KB
MD5

deb7ba77dcf2e54fb23d1a9b0e51088d
SHA1

6468abad160c22594fc014d948963ba4a8565074
SHA256

05b123c99c5736a62f1cfd6bc6a9335a533849fe663d875d20ece0caca82e077
SHA512

18cedb50ceab47fed77100586bbb68692d82e4d3afe59815e0fb0d7c88677362756d2bcdc3003f0e6e1b2a3edff36ac450a9864d4d64ef5218612bc86e538de2
SSDEEP

12288:GKLmyuewe+aR5pDIBqIBpoAmxkPnGZKYKvwdUyBWwKoX6t:GoBuQ+I5p5qpLhu33BWwXqt

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 12 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	1476	1000	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4656	1000	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2940	1000	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4476	1000	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2712	1000	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3396	1000	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3976	1000	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1496	1000	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3316	1000	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3840	1000	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	668	1000	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	948	1000	schtasks.exe	82

DCRat payload 2 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral2/memory/940-1-0x00000000002B0000-0x0000000000386000-memory.dmp	dcrat
behavioral2/files/0x000a000000023b95-11.dat	dcrat

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	05b123c99c5736a62f1cfd6bc6a9335a533849fe663d875d20ece0caca82e077.exe

Executes dropped EXE 1 IoCs

pid	Process
1380	fontdrvhost.exe

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\fontdrvhost.exe	05b123c99c5736a62f1cfd6bc6a9335a533849fe663d875d20ece0caca82e077.exe
File created	C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\5b884080fd4f94	05b123c99c5736a62f1cfd6bc6a9335a533849fe663d875d20ece0caca82e077.exe
File created	C:\Program Files (x86)\Microsoft.NET\csrss.exe	05b123c99c5736a62f1cfd6bc6a9335a533849fe663d875d20ece0caca82e077.exe
File created	C:\Program Files (x86)\Microsoft.NET\886983d96e3d3e	05b123c99c5736a62f1cfd6bc6a9335a533849fe663d875d20ece0caca82e077.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\Panther\UnattendGC\fontdrvhost.exe	05b123c99c5736a62f1cfd6bc6a9335a533849fe663d875d20ece0caca82e077.exe
File created	C:\Windows\Panther\UnattendGC\5b884080fd4f94	05b123c99c5736a62f1cfd6bc6a9335a533849fe663d875d20ece0caca82e077.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 12 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
3976	schtasks.exe
1476	schtasks.exe
4656	schtasks.exe
4476	schtasks.exe
2712	schtasks.exe
3396	schtasks.exe
948	schtasks.exe
2940	schtasks.exe
1496	schtasks.exe
3316	schtasks.exe
3840	schtasks.exe
668	schtasks.exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

pid	Process
940	05b123c99c5736a62f1cfd6bc6a9335a533849fe663d875d20ece0caca82e077.exe
940	05b123c99c5736a62f1cfd6bc6a9335a533849fe663d875d20ece0caca82e077.exe
940	05b123c99c5736a62f1cfd6bc6a9335a533849fe663d875d20ece0caca82e077.exe
940	05b123c99c5736a62f1cfd6bc6a9335a533849fe663d875d20ece0caca82e077.exe
940	05b123c99c5736a62f1cfd6bc6a9335a533849fe663d875d20ece0caca82e077.exe
1380	fontdrvhost.exe
1380	fontdrvhost.exe
1380	fontdrvhost.exe
1380	fontdrvhost.exe
1380	fontdrvhost.exe
1380	fontdrvhost.exe
1380	fontdrvhost.exe
1380	fontdrvhost.exe
1380	fontdrvhost.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	940	05b123c99c5736a62f1cfd6bc6a9335a533849fe663d875d20ece0caca82e077.exe
Token: SeDebugPrivilege	1380	fontdrvhost.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 940 wrote to memory of 1380	940	05b123c99c5736a62f1cfd6bc6a9335a533849fe663d875d20ece0caca82e077.exe	95
PID 940 wrote to memory of 1380	940	05b123c99c5736a62f1cfd6bc6a9335a533849fe663d875d20ece0caca82e077.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\05b123c99c5736a62f1cfd6bc6a9335a533849fe663d875d20ece0caca82e077.exe
"C:\Users\Admin\AppData\Local\Temp\05b123c99c5736a62f1cfd6bc6a9335a533849fe663d875d20ece0caca82e077.exe"
1⤵
- Checks computer location settings
- Drops file in Program Files directory
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:940
- C:\Windows\Panther\UnattendGC\fontdrvhost.exe
  "C:\Windows\Panther\UnattendGC\fontdrvhost.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1380

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 8 /tr "'C:\Recovery\WindowsRE\wininit.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1476

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\wininit.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4656

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 12 /tr "'C:\Recovery\WindowsRE\wininit.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2940

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 13 /tr "'C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\fontdrvhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4476

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\fontdrvhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2712

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 6 /tr "'C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\fontdrvhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3396

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 10 /tr "'C:\Windows\Panther\UnattendGC\fontdrvhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3976

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\Windows\Panther\UnattendGC\fontdrvhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1496

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 6 /tr "'C:\Windows\Panther\UnattendGC\fontdrvhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3316

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 10 /tr "'C:\Program Files (x86)\Microsoft.NET\csrss.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3840

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Program Files (x86)\Microsoft.NET\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:668

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 12 /tr "'C:\Program Files (x86)\Microsoft.NET\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:948

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

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\Panther\UnattendGC\fontdrvhost.exe

Filesize
828KB

MD5
deb7ba77dcf2e54fb23d1a9b0e51088d

SHA1
6468abad160c22594fc014d948963ba4a8565074

SHA256
05b123c99c5736a62f1cfd6bc6a9335a533849fe663d875d20ece0caca82e077

SHA512
18cedb50ceab47fed77100586bbb68692d82e4d3afe59815e0fb0d7c88677362756d2bcdc3003f0e6e1b2a3edff36ac450a9864d4d64ef5218612bc86e538de2

Download Submit
memory/940-0-0x00007FF878A33000-0x00007FF878A35000-memory.dmp

Filesize
8KB

Download
memory/940-1-0x00000000002B0000-0x0000000000386000-memory.dmp

Filesize
856KB

Download
memory/940-4-0x00007FF878A30000-0x00007FF8794F1000-memory.dmp

Filesize
10.8MB

Download
memory/940-22-0x00007FF878A30000-0x00007FF8794F1000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads