dcrat | f896c6618235d320b62e6662673830cbd21d7be057b356eef83aac8f21684b6f

General

Target

048AC151CE97E95A980399E849DAAE95.exe
Size

428KB
MD5

048ac151ce97e95a980399e849daae95
SHA1

3a89733c03e49f7504f6731ee9f626dad52fb369
SHA256

f896c6618235d320b62e6662673830cbd21d7be057b356eef83aac8f21684b6f
SHA512

2532c573dc938ff3401c15bd916312228a09a33a09b92723dcc979c499dbe9078812cc3a73428cc3dc9dd98edf8a0f61a15e3a399acd516a2fda02d4a95dd394

Score

10^/10

dcrat infostealer rat spyware stealer

Malware Config

Signatures

DcRat
DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.
rat infostealer dcrat

DCRat Payload 2 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

Processes:

resource	yara_rule
C:\Windows\System32\DataUsageHandlers\dwm.exe	dcrat
C:\Windows\System32\DataUsageHandlers\dwm.exe	dcrat

Executes dropped EXE 1 IoCs

Processes:

dwm.exe

pid process

3380 dwm.exe
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials in Files
T1081
Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

11 ipinfo.io
12 ipinfo.io

pid	process
3380	dwm.exe

flow	ioc
11	ipinfo.io
12	ipinfo.io

Drops file in System32 directory 5 IoCs

Processes:

048AC151CE97E95A980399E849DAAE95.exe

description	ioc	process
File created	C:\Windows\System32\DataUsageHandlers\6cb0b6c459d5d3455a3da700e713f2e2529862ff	048AC151CE97E95A980399E849DAAE95.exe
File created	C:\Windows\System32\KeywordDetectorMsftSidAdapter\winlogon.exe	048AC151CE97E95A980399E849DAAE95.exe
File created	C:\Windows\System32\KeywordDetectorMsftSidAdapter\cc11b995f2a76da408ea6a601e682e64743153ad	048AC151CE97E95A980399E849DAAE95.exe
File created	C:\Windows\System32\DataUsageHandlers\dwm.exe	048AC151CE97E95A980399E849DAAE95.exe
File opened for modification	C:\Windows\System32\DataUsageHandlers\dwm.exe	048AC151CE97E95A980399E849DAAE95.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 4 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exeschtasks.exeschtasks.exeschtasks.exe

pid process

2724 schtasks.exe
188 schtasks.exe
2496 schtasks.exe
1512 schtasks.exe
Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

048AC151CE97E95A980399E849DAAE95.exedwm.exe

pid process

3744 048AC151CE97E95A980399E849DAAE95.exe
3380 dwm.exe
3380 dwm.exe
Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

dwm.exe

pid process

3380 dwm.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

048AC151CE97E95A980399E849DAAE95.exedwm.exe

description pid process

Token: SeDebugPrivilege 3744 048AC151CE97E95A980399E849DAAE95.exe
Token: SeDebugPrivilege 3380 dwm.exe

pid	process
2724	schtasks.exe
188	schtasks.exe
2496	schtasks.exe
1512	schtasks.exe

pid	process
3744	048AC151CE97E95A980399E849DAAE95.exe
3380	dwm.exe
3380	dwm.exe

pid	process
3380	dwm.exe

description	pid	process
Token: SeDebugPrivilege	3744	048AC151CE97E95A980399E849DAAE95.exe
Token: SeDebugPrivilege	3380	dwm.exe

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

048AC151CE97E95A980399E849DAAE95.exe

description	pid	process	target process
PID 3744 wrote to memory of 188	3744	048AC151CE97E95A980399E849DAAE95.exe	schtasks.exe
PID 3744 wrote to memory of 188	3744	048AC151CE97E95A980399E849DAAE95.exe	schtasks.exe
PID 3744 wrote to memory of 2496	3744	048AC151CE97E95A980399E849DAAE95.exe	schtasks.exe
PID 3744 wrote to memory of 2496	3744	048AC151CE97E95A980399E849DAAE95.exe	schtasks.exe
PID 3744 wrote to memory of 1512	3744	048AC151CE97E95A980399E849DAAE95.exe	schtasks.exe
PID 3744 wrote to memory of 1512	3744	048AC151CE97E95A980399E849DAAE95.exe	schtasks.exe
PID 3744 wrote to memory of 2724	3744	048AC151CE97E95A980399E849DAAE95.exe	schtasks.exe
PID 3744 wrote to memory of 2724	3744	048AC151CE97E95A980399E849DAAE95.exe	schtasks.exe
PID 3744 wrote to memory of 3380	3744	048AC151CE97E95A980399E849DAAE95.exe	dwm.exe
PID 3744 wrote to memory of 3380	3744	048AC151CE97E95A980399E849DAAE95.exe	dwm.exe

C:\Users\Admin\AppData\Local\Temp\048AC151CE97E95A980399E849DAAE95.exe
"C:\Users\Admin\AppData\Local\Temp\048AC151CE97E95A980399E849DAAE95.exe"
1⤵
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3744
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "dwm" /sc ONLOGON /tr "'C:\Windows\System32\DataUsageHandlers\dwm.exe'" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:188
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "WmiPrvSE" /sc ONLOGON /tr "'C:\Documents and Settings\WmiPrvSE.exe'" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:2496
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "winlogon" /sc ONLOGON /tr "'C:\Windows\System32\KeywordDetectorMsftSidAdapter\winlogon.exe'" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:1512
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\PerfLogs\fontdrvhost.exe'" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:2724
- C:\Windows\System32\DataUsageHandlers\dwm.exe
  "C:\Windows\System32\DataUsageHandlers\dwm.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of AdjustPrivilegeToken
  PID:3380

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Credential Access

Credentials in Files

2

T1081

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

2

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\System32\DataUsageHandlers\dwm.exe

MD5
048ac151ce97e95a980399e849daae95

SHA1
3a89733c03e49f7504f6731ee9f626dad52fb369

SHA256
f896c6618235d320b62e6662673830cbd21d7be057b356eef83aac8f21684b6f

SHA512
2532c573dc938ff3401c15bd916312228a09a33a09b92723dcc979c499dbe9078812cc3a73428cc3dc9dd98edf8a0f61a15e3a399acd516a2fda02d4a95dd394

Download Submit
C:\Windows\System32\DataUsageHandlers\dwm.exe

MD5
048ac151ce97e95a980399e849daae95

SHA1
3a89733c03e49f7504f6731ee9f626dad52fb369

SHA256
f896c6618235d320b62e6662673830cbd21d7be057b356eef83aac8f21684b6f

SHA512
2532c573dc938ff3401c15bd916312228a09a33a09b92723dcc979c499dbe9078812cc3a73428cc3dc9dd98edf8a0f61a15e3a399acd516a2fda02d4a95dd394

Download Submit
memory/188-117-0x0000000000000000-mapping.dmp

Download
memory/1512-119-0x0000000000000000-mapping.dmp

Download
memory/2496-118-0x0000000000000000-mapping.dmp

Download
memory/2724-120-0x0000000000000000-mapping.dmp

Download
memory/3380-128-0x00000161CC9F0000-0x00000161CC9F1000-memory.dmp

Filesize
4KB

Download
memory/3380-121-0x0000000000000000-mapping.dmp

Download
memory/3380-126-0x00000161CB180000-0x00000161CB182000-memory.dmp

Filesize
8KB

Download
memory/3380-127-0x00000161CB1E0000-0x00000161CB1E7000-memory.dmp

Filesize
28KB

Download
memory/3380-129-0x00000161CCA10000-0x00000161CCA15000-memory.dmp

Filesize
20KB

Download
memory/3380-130-0x00000161CC9D0000-0x00000161CC9D2000-memory.dmp

Filesize
8KB

Download
memory/3380-131-0x00000161CC9E0000-0x00000161CC9E2000-memory.dmp

Filesize
8KB

Download
memory/3380-132-0x00000161E5750000-0x00000161E5751000-memory.dmp

Filesize
4KB

Download
memory/3380-133-0x00000161E6050000-0x00000161E6051000-memory.dmp

Filesize
4KB

Download
memory/3744-116-0x0000023D53C20000-0x0000023D53C22000-memory.dmp

Filesize
8KB

Download
memory/3744-114-0x0000023D397A0000-0x0000023D397A1000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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