dcrat | 14fe2e3c3da4f7833248a28afe183191cb4a0bb4412fd6b7efdd2606542c8041

General

Target

14fe2e3c3da4f7833248a28afe183191cb4a0bb4412fd6b7efdd2606542c8041N.exe
Size

973KB
MD5

9e2d06b56585b3d7cf2453d98c53de20
SHA1

5858c3ae6bdf0e1a2f4d15d02094cf0172946c52
SHA256

14fe2e3c3da4f7833248a28afe183191cb4a0bb4412fd6b7efdd2606542c8041
SHA512

c6b32a070a557c3bc23c807a419305f6bf91033a9d4a010c110c1221962718c3d0bb582ac20ff9e0344caa504545ea5aacfc17979003327fda1c192b962d4010
SSDEEP

12288:/hhBMuext92N3cit1RGJV/H0uQ1PjmzBd5EBy10cgZMc29ZxasnLlDD:/5E92NRzO/UFdmBchH29Zsg9

Score

10^/10

dcrat infostealer persistence rat

Malware Config

Signatures

DcRat 8 IoCs

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

rat infostealer dcrat

description	ioc	pid	Process
		2656	schtasks.exe
		3036	schtasks.exe
		380	schtasks.exe
		572	schtasks.exe
File created	C:\Windows\PFRO\explorer.exe		14fe2e3c3da4f7833248a28afe183191cb4a0bb4412fd6b7efdd2606542c8041N.exe
File created	C:\Windows\PFRO\7a0fd90576e088		14fe2e3c3da4f7833248a28afe183191cb4a0bb4412fd6b7efdd2606542c8041N.exe
		2760	schtasks.exe
		2592	schtasks.exe

Process spawned unexpected child process 6 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	2760	2692	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2592	2692	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2656	2692	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3036	2692	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	380	2692	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	572	2692	schtasks.exe	30

Executes dropped EXE 1 IoCs

pid	Process
1312	explorer.exe

Adds Run key to start application 2 TTPs 6 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\explorer = "\"C:\\Windows\\PFRO\\explorer.exe\""	14fe2e3c3da4f7833248a28afe183191cb4a0bb4412fd6b7efdd2606542c8041N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\14fe2e3c3da4f7833248a28afe183191cb4a0bb4412fd6b7efdd2606542c8041N = "\"C:\\Documents and Settings\\14fe2e3c3da4f7833248a28afe183191cb4a0bb4412fd6b7efdd2606542c8041N.exe\""	14fe2e3c3da4f7833248a28afe183191cb4a0bb4412fd6b7efdd2606542c8041N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\smss = "\"C:\\ProgramData\\Documents\\smss.exe\""	14fe2e3c3da4f7833248a28afe183191cb4a0bb4412fd6b7efdd2606542c8041N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\MSOCache\\All Users\\{90140000-0117-0409-0000-0000000FF1CE}-C\\Access.en-us\\csrss.exe\""	14fe2e3c3da4f7833248a28afe183191cb4a0bb4412fd6b7efdd2606542c8041N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winlogon = "\"C:\\PerfLogs\\Admin\\winlogon.exe\""	14fe2e3c3da4f7833248a28afe183191cb4a0bb4412fd6b7efdd2606542c8041N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\14fe2e3c3da4f7833248a28afe183191cb4a0bb4412fd6b7efdd2606542c8041N = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\ose00000\\14fe2e3c3da4f7833248a28afe183191cb4a0bb4412fd6b7efdd2606542c8041N.exe\""	14fe2e3c3da4f7833248a28afe183191cb4a0bb4412fd6b7efdd2606542c8041N.exe

Drops file in Windows directory 4 IoCs

description	ioc	Process
File created	C:\Windows\PFRO\explorer.exe	14fe2e3c3da4f7833248a28afe183191cb4a0bb4412fd6b7efdd2606542c8041N.exe
File opened for modification	C:\Windows\PFRO\explorer.exe	14fe2e3c3da4f7833248a28afe183191cb4a0bb4412fd6b7efdd2606542c8041N.exe
File created	C:\Windows\PFRO\7a0fd90576e088	14fe2e3c3da4f7833248a28afe183191cb4a0bb4412fd6b7efdd2606542c8041N.exe
File opened for modification	C:\Windows\PFRO\RCX6ECB.tmp	14fe2e3c3da4f7833248a28afe183191cb4a0bb4412fd6b7efdd2606542c8041N.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 6 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
2656	schtasks.exe
3036	schtasks.exe
380	schtasks.exe
572	schtasks.exe
2760	schtasks.exe
2592	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2876	14fe2e3c3da4f7833248a28afe183191cb4a0bb4412fd6b7efdd2606542c8041N.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2876	14fe2e3c3da4f7833248a28afe183191cb4a0bb4412fd6b7efdd2606542c8041N.exe
Token: SeDebugPrivilege	1312	explorer.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2876 wrote to memory of 2052	2876	14fe2e3c3da4f7833248a28afe183191cb4a0bb4412fd6b7efdd2606542c8041N.exe	37
PID 2876 wrote to memory of 2052	2876	14fe2e3c3da4f7833248a28afe183191cb4a0bb4412fd6b7efdd2606542c8041N.exe	37
PID 2876 wrote to memory of 2052	2876	14fe2e3c3da4f7833248a28afe183191cb4a0bb4412fd6b7efdd2606542c8041N.exe	37
PID 2052 wrote to memory of 2580	2052	cmd.exe	39
PID 2052 wrote to memory of 2580	2052	cmd.exe	39
PID 2052 wrote to memory of 2580	2052	cmd.exe	39
PID 2052 wrote to memory of 1312	2052	cmd.exe	40
PID 2052 wrote to memory of 1312	2052	cmd.exe	40
PID 2052 wrote to memory of 1312	2052	cmd.exe	40

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\14fe2e3c3da4f7833248a28afe183191cb4a0bb4412fd6b7efdd2606542c8041N.exe
"C:\Users\Admin\AppData\Local\Temp\14fe2e3c3da4f7833248a28afe183191cb4a0bb4412fd6b7efdd2606542c8041N.exe"
1⤵
- DcRat
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2876
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\3kUzIpK7rW.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2052
- - C:\Windows\system32\w32tm.exe
    w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
    3⤵
    PID:2580
- - C:\Windows\PFRO\explorer.exe
    "C:\Windows\PFRO\explorer.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:1312

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

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "14fe2e3c3da4f7833248a28afe183191cb4a0bb4412fd6b7efdd2606542c8041N" /sc ONLOGON /tr "'C:\Documents and Settings\14fe2e3c3da4f7833248a28afe183191cb4a0bb4412fd6b7efdd2606542c8041N.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2592

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\ProgramData\Documents\smss.exe'" /rl HIGHEST /f
1⤵
- DcRat
- 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:\MSOCache\All Users\{90140000-0117-0409-0000-0000000FF1CE}-C\Access.en-us\csrss.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3036

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "winlogon" /sc ONLOGON /tr "'C:\PerfLogs\Admin\winlogon.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:380

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "14fe2e3c3da4f7833248a28afe183191cb4a0bb4412fd6b7efdd2606542c8041N" /sc ONLOGON /tr "'C:\Users\Admin\AppData\Local\Temp\ose00000\14fe2e3c3da4f7833248a28afe183191cb4a0bb4412fd6b7efdd2606542c8041N.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:572

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Modify Registry

1

T1112

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:\PerfLogs\Admin\winlogon.exe

Filesize
973KB

MD5
9e2d06b56585b3d7cf2453d98c53de20

SHA1
5858c3ae6bdf0e1a2f4d15d02094cf0172946c52

SHA256
14fe2e3c3da4f7833248a28afe183191cb4a0bb4412fd6b7efdd2606542c8041

SHA512
c6b32a070a557c3bc23c807a419305f6bf91033a9d4a010c110c1221962718c3d0bb582ac20ff9e0344caa504545ea5aacfc17979003327fda1c192b962d4010

Download Submit
C:\Users\Admin\AppData\Local\Temp\3kUzIpK7rW.bat

Filesize
192B

MD5
094271227a9095c74a3f0a1adb377442

SHA1
61ca9164ad741652d2b09469d9b9d4129fb9da97

SHA256
8376c060c82974b10df582d9a71d84098b44f04332ba94f331705fe7237bc581

SHA512
ec37252bc4de31f0a926ac22dec9219534143c4fe138774222865729e086946b0c03a6ea8ad6f97d3d3081f335da721ac604171d7dac579b89d8977ddab84134

Download Submit
C:\Windows\PFRO\explorer.exe

Filesize
973KB

MD5
77941a912b8924c5e8a0332819feba9c

SHA1
35143209431fad92732be779ad1e83c05b8a5453

SHA256
cdcb85ad2b89927c65fe562bde5ecd4e3ef77ccbe963cc8f81d074ba1a059fb6

SHA512
082aa21cd9f1e8f7e52f5c1e238585ab7d48f853df3fe4ebf31b2c68b9de1bca55fa04b38f8dce1d1c980e53d9f61b8a27a96c87e56e9c3ff6b64b2228964fde

Download Submit
memory/1312-70-0x0000000001340000-0x000000000143A000-memory.dmp

Filesize
1000KB

Download
memory/2876-3-0x0000000000570000-0x0000000000578000-memory.dmp

Filesize
32KB

Download
memory/2876-5-0x0000000001F30000-0x0000000001F3C000-memory.dmp

Filesize
48KB

Download
memory/2876-6-0x0000000001F40000-0x0000000001F4C000-memory.dmp

Filesize
48KB

Download
memory/2876-7-0x0000000001F50000-0x0000000001F58000-memory.dmp

Filesize
32KB

Download
memory/2876-4-0x0000000000920000-0x0000000000930000-memory.dmp

Filesize
64KB

Download
memory/2876-0-0x000007FEF5453000-0x000007FEF5454000-memory.dmp

Filesize
4KB

Download
memory/2876-67-0x000007FEF5450000-0x000007FEF5E3C000-memory.dmp

Filesize
9.9MB

Download
memory/2876-2-0x000007FEF5450000-0x000007FEF5E3C000-memory.dmp

Filesize
9.9MB

Download
memory/2876-1-0x0000000000930000-0x0000000000A2A000-memory.dmp

Filesize
1000KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads