dcrat | 4b6302643800dafe4629960e243ba26663f8510c42f4eaf656b1cc510406e408 | Triage

Analysis

max time kernel
147s
max time network
150s
platform
windows11-21h2_x64
resource
win11-20241007-en
resource tags

arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
submitted
23-11-2024 01:12

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General

Target

portperf.exe
Size

829KB
MD5

a054982f7e12c1f491eccd25d9c1b5d7
SHA1

b3c78b1c7c8a95486db06e39f56910d0f3e90996
SHA256

4b6302643800dafe4629960e243ba26663f8510c42f4eaf656b1cc510406e408
SHA512

d57be5af22f21e7c20d330f5714ddcf1936152e3d9bd2254c1a2c83f420bfe183ae204c871b1ce2d8f5361a1661afbe39a9b5bec12fb00195a8c0b967977a925
SSDEEP

24576:b3eblFYt2e9esxtDyVjD7D1NauFd3YP+ow7:b2rejxtDydhc

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

DCRat payload 2 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

resource	yara_rule
behavioral3/memory/2820-1-0x0000000000A20000-0x0000000000AF6000-memory.dmp	dcrat
behavioral3/files/0x001900000002aace-11.dat	dcrat

Executes dropped EXE 1 IoCs

pid	Process
4908	fontdrvhost.exe

Drops file in Program Files directory 6 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Common Files\Oracle\Java\javapath_target_151796\6ccacd8608530f	portperf.exe
File created	C:\Program Files\Mozilla Firefox\browser\fontdrvhost.exe	portperf.exe
File created	C:\Program Files\Mozilla Firefox\browser\5b884080fd4f94	portperf.exe
File created	C:\Program Files (x86)\WindowsPowerShell\Configuration\portperf.exe	portperf.exe
File created	C:\Program Files (x86)\WindowsPowerShell\Configuration\15e6245453a3ff	portperf.exe
File created	C:\Program Files (x86)\Common Files\Oracle\Java\javapath_target_151796\Idle.exe	portperf.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SystemTemp\winlogon.exe	portperf.exe
File created	C:\Windows\SystemTemp\cc11b995f2a76d	portperf.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 21 IoCs

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

persistence execution

Scheduled Task

pid	Process
4880	schtasks.exe
4336	schtasks.exe
3344	schtasks.exe
2700	schtasks.exe
4228	schtasks.exe
4244	schtasks.exe
1504	schtasks.exe
1180	schtasks.exe
416	schtasks.exe
4456	schtasks.exe
2096	schtasks.exe
4332	schtasks.exe
4856	schtasks.exe
4036	schtasks.exe
2804	schtasks.exe
792	schtasks.exe
608	schtasks.exe
3540	schtasks.exe
4708	schtasks.exe
2744	schtasks.exe
5048	schtasks.exe

Suspicious behavior: EnumeratesProcesses 32 IoCs

pid	Process
2820	portperf.exe
2820	portperf.exe
2820	portperf.exe
2820	portperf.exe
2820	portperf.exe
2820	portperf.exe
2820	portperf.exe
2820	portperf.exe
2820	portperf.exe
2820	portperf.exe
2820	portperf.exe
2820	portperf.exe
2820	portperf.exe
2820	portperf.exe
2820	portperf.exe
2820	portperf.exe
2820	portperf.exe
2820	portperf.exe
2820	portperf.exe
2820	portperf.exe
2820	portperf.exe
2820	portperf.exe
2820	portperf.exe
4908	fontdrvhost.exe
4908	fontdrvhost.exe
4908	fontdrvhost.exe
4908	fontdrvhost.exe
4908	fontdrvhost.exe
4908	fontdrvhost.exe
4908	fontdrvhost.exe
4908	fontdrvhost.exe
4908	fontdrvhost.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
4908	fontdrvhost.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2820	portperf.exe
Token: SeDebugPrivilege	4908	fontdrvhost.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 2820 wrote to memory of 4908	2820	portperf.exe	99
PID 2820 wrote to memory of 4908	2820	portperf.exe	99

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\portperf.exe
"C:\Users\Admin\AppData\Local\Temp\portperf.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:2820
- C:\Program Files\Mozilla Firefox\browser\fontdrvhost.exe
  "C:\Program Files\Mozilla Firefox\browser\fontdrvhost.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of AdjustPrivilegeToken
  PID:4908

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 9 /tr "'C:\Recovery\WindowsRE\Idle.exe'" /f
1⤵
- Scheduled Task/Job: Scheduled Task
PID:2744

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\Idle.exe'" /rl HIGHEST /f
1⤵
- Scheduled Task/Job: Scheduled Task
PID:1180

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 7 /tr "'C:\Recovery\WindowsRE\Idle.exe'" /rl HIGHEST /f
1⤵
- Scheduled Task/Job: Scheduled Task
PID:416

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "portperfp" /sc MINUTE /mo 13 /tr "'C:\Program Files (x86)\WindowsPowerShell\Configuration\portperf.exe'" /f
1⤵
- Scheduled Task/Job: Scheduled Task
PID:5048

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "portperf" /sc ONLOGON /tr "'C:\Program Files (x86)\WindowsPowerShell\Configuration\portperf.exe'" /rl HIGHEST /f
1⤵
- Scheduled Task/Job: Scheduled Task
PID:608

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "portperfp" /sc MINUTE /mo 11 /tr "'C:\Program Files (x86)\WindowsPowerShell\Configuration\portperf.exe'" /rl HIGHEST /f
1⤵
- Scheduled Task/Job: Scheduled Task
PID:792

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 7 /tr "'C:\Program Files (x86)\Common Files\Oracle\Java\javapath_target_151796\Idle.exe'" /f
1⤵
- Scheduled Task/Job: Scheduled Task
PID:4708

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\Program Files (x86)\Common Files\Oracle\Java\javapath_target_151796\Idle.exe'" /rl HIGHEST /f
1⤵
- Scheduled Task/Job: Scheduled Task
PID:4856

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 10 /tr "'C:\Program Files (x86)\Common Files\Oracle\Java\javapath_target_151796\Idle.exe'" /rl HIGHEST /f
1⤵
- Scheduled Task/Job: Scheduled Task
PID:4880

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "portperfp" /sc MINUTE /mo 10 /tr "'C:\Recovery\WindowsRE\portperf.exe'" /f
1⤵
- Scheduled Task/Job: Scheduled Task
PID:4036

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "portperf" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\portperf.exe'" /rl HIGHEST /f
1⤵
- Scheduled Task/Job: Scheduled Task
PID:4332

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "portperfp" /sc MINUTE /mo 5 /tr "'C:\Recovery\WindowsRE\portperf.exe'" /rl HIGHEST /f
1⤵
- Scheduled Task/Job: Scheduled Task
PID:1504

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 5 /tr "'C:\Program Files\Mozilla Firefox\browser\fontdrvhost.exe'" /f
1⤵
- Scheduled Task/Job: Scheduled Task
PID:2096

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\Program Files\Mozilla Firefox\browser\fontdrvhost.exe'" /rl HIGHEST /f
1⤵
- Scheduled Task/Job: Scheduled Task
PID:4244

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 9 /tr "'C:\Program Files\Mozilla Firefox\browser\fontdrvhost.exe'" /rl HIGHEST /f
1⤵
- Scheduled Task/Job: Scheduled Task
PID:3344

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 12 /tr "'C:\Windows\SystemTemp\winlogon.exe'" /f
1⤵
- Scheduled Task/Job: Scheduled Task
PID:4336

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "winlogon" /sc ONLOGON /tr "'C:\Windows\SystemTemp\winlogon.exe'" /rl HIGHEST /f
1⤵
- Scheduled Task/Job: Scheduled Task
PID:4228

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 14 /tr "'C:\Windows\SystemTemp\winlogon.exe'" /rl HIGHEST /f
1⤵
- Scheduled Task/Job: Scheduled Task
PID:4456

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 6 /tr "'C:\Users\Admin\Cookies\sppsvc.exe'" /f
1⤵
- Scheduled Task/Job: Scheduled Task
PID:3540

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sppsvc" /sc ONLOGON /tr "'C:\Users\Admin\Cookies\sppsvc.exe'" /rl HIGHEST /f
1⤵
- Scheduled Task/Job: Scheduled Task
PID:2700

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 6 /tr "'C:\Users\Admin\Cookies\sppsvc.exe'" /rl HIGHEST /f
1⤵
- Scheduled Task/Job: Scheduled Task
PID:2804

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

Scheduled Task

Persistence

Scheduled Task/Job

Scheduled Task

Privilege Escalation

Scheduled Task/Job

Scheduled Task

Defense Evasion

Credential Access

Discovery

Query Registry

System Information Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Program Files\Mozilla Firefox\browser\fontdrvhost.exe

Filesize
829KB

MD5
a054982f7e12c1f491eccd25d9c1b5d7

SHA1
b3c78b1c7c8a95486db06e39f56910d0f3e90996

SHA256
4b6302643800dafe4629960e243ba26663f8510c42f4eaf656b1cc510406e408

SHA512
d57be5af22f21e7c20d330f5714ddcf1936152e3d9bd2254c1a2c83f420bfe183ae204c871b1ce2d8f5361a1661afbe39a9b5bec12fb00195a8c0b967977a925

Download Submit
memory/2820-0-0x00007FFFCDB53000-0x00007FFFCDB55000-memory.dmp

Filesize
8KB

Download
memory/2820-1-0x0000000000A20000-0x0000000000AF6000-memory.dmp

Filesize
856KB

Download
memory/2820-2-0x00007FFFCDB50000-0x00007FFFCE612000-memory.dmp

Filesize
10.8MB

Download
memory/2820-28-0x00007FFFCDB50000-0x00007FFFCE612000-memory.dmp

Filesize
10.8MB

Download
memory/4908-29-0x000000001C7C0000-0x000000001C806000-memory.dmp

Filesize
280KB

Download
memory/4908-33-0x000000001C860000-0x000000001C86B000-memory.dmp

Filesize
44KB

Download
memory/4908-32-0x000000001C840000-0x000000001C85E000-memory.dmp

Filesize
120KB

Download
memory/4908-31-0x000000001C830000-0x000000001C83D000-memory.dmp

Filesize
52KB

Download
memory/4908-30-0x000000001BD20000-0x000000001BD29000-memory.dmp

Filesize
36KB

Download