dcrat | faa426705d165290c5748fbd2d6022a4e269d704fb6dbb24d0167aea0741c3b8

Analysis

max time kernel
42s
max time network
45s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
24/10/2022, 18:01

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General

Target
FAA426705D165290C5748FBD2D6022A4E269D704FB6DB.exe
Size 2.3MB
Sample221024-wlymxaaaak
SHA256 faa426705d165290c5748fbd2d6022a4e269d704fb6dbb24d0167aea0741c3b8
MD5 7a3673360005748ae7855199875ffd75
SHA1 48a43a28451d85a04b6337e49a7c2a5fa026664e
SHA512 ef9366353f40f17986890e476c0ed4696177c8f710399b1fb8776cf4e5ba97dead2907778812a0305bbbe8e57b235d5c8a16e20af1683f9f82c3fb43d7c6656f
SSDEEP 49152:XkIOEDTD5PrzrO1FzQBt14rs/IiijcRLsc/sDBDf463fF:XlTlQrViijc9/sVDf463N
MD5 SHA1 SHA512 SSDEEP

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

Process spawned unexpected child process 15 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	580	1996	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1820	1996	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	472	1996	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	900	1996	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2008	1996	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1796	1996	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	784	1996	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1656	1996	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1660	1996	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1732	1996	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1992	1996	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1496	1996	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1260	1996	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	836	1996	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1504	1996	schtasks.exe	28

DCRat payload 4 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/memory/1936-54-0x00000000013C0000-0x0000000001612000-memory.dmp	dcrat
behavioral1/files/0x0007000000013a13-63.dat	dcrat
behavioral1/files/0x0007000000013a13-64.dat	dcrat
behavioral1/memory/1512-65-0x0000000000230000-0x0000000000482000-memory.dmp	dcrat

Executes dropped EXE 1 IoCs

pid	Process
1512	Idle.exe

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File created	C:\Program Files\Windows NT\Accessories\it-IT\System.exe	FAA426705D165290C5748FBD2D6022A4E269D704FB6DB.exe
File created	C:\Program Files\Windows NT\Accessories\it-IT\27d1bcfc3c54e0	FAA426705D165290C5748FBD2D6022A4E269D704FB6DB.exe
File created	C:\Program Files (x86)\Microsoft Synchronization Services\ADO.NET\v1.0\winlogon.exe	FAA426705D165290C5748FBD2D6022A4E269D704FB6DB.exe
File created	C:\Program Files (x86)\Microsoft Synchronization Services\ADO.NET\v1.0\cc11b995f2a76d	FAA426705D165290C5748FBD2D6022A4E269D704FB6DB.exe

Drops file in Windows directory 4 IoCs

description	ioc	Process
File created	C:\Windows\inf\de-DE\services.exe	FAA426705D165290C5748FBD2D6022A4E269D704FB6DB.exe
File created	C:\Windows\inf\de-DE\c5b4cb5e9653cc	FAA426705D165290C5748FBD2D6022A4E269D704FB6DB.exe
File created	C:\Windows\addins\Idle.exe	FAA426705D165290C5748FBD2D6022A4E269D704FB6DB.exe
File created	C:\Windows\addins\6ccacd8608530f	FAA426705D165290C5748FBD2D6022A4E269D704FB6DB.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 15 IoCs

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

persistence

Scheduled Task

T1053

pid	Process
1992	schtasks.exe
580	schtasks.exe
2008	schtasks.exe
1496	schtasks.exe
1260	schtasks.exe
1820	schtasks.exe
900	schtasks.exe
836	schtasks.exe
1504	schtasks.exe
1732	schtasks.exe
472	schtasks.exe
1796	schtasks.exe
784	schtasks.exe
1656	schtasks.exe
1660	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1936	FAA426705D165290C5748FBD2D6022A4E269D704FB6DB.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1936	FAA426705D165290C5748FBD2D6022A4E269D704FB6DB.exe
Token: SeDebugPrivilege	1512	Idle.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1936 wrote to memory of 1512	1936	FAA426705D165290C5748FBD2D6022A4E269D704FB6DB.exe	44
PID 1936 wrote to memory of 1512	1936	FAA426705D165290C5748FBD2D6022A4E269D704FB6DB.exe	44
PID 1936 wrote to memory of 1512	1936	FAA426705D165290C5748FBD2D6022A4E269D704FB6DB.exe	44

C:\Users\Admin\AppData\Local\Temp\FAA426705D165290C5748FBD2D6022A4E269D704FB6DB.exe
"C:\Users\Admin\AppData\Local\Temp\FAA426705D165290C5748FBD2D6022A4E269D704FB6DB.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:1936
- C:\Windows\addins\Idle.exe
  "C:\Windows\addins\Idle.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1512

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 6 /tr "'C:\Recovery\c11c4da2-1a8a-11ed-8505-e0b24281b398\spoolsv.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:580

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Recovery\c11c4da2-1a8a-11ed-8505-e0b24281b398\spoolsv.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1820

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 8 /tr "'C:\Recovery\c11c4da2-1a8a-11ed-8505-e0b24281b398\spoolsv.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:472

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 5 /tr "'C:\Program Files\Windows NT\Accessories\it-IT\System.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:900

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "System" /sc ONLOGON /tr "'C:\Program Files\Windows NT\Accessories\it-IT\System.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2008

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 13 /tr "'C:\Program Files\Windows NT\Accessories\it-IT\System.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1796

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "servicess" /sc MINUTE /mo 10 /tr "'C:\Windows\inf\de-DE\services.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:784

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\Windows\inf\de-DE\services.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1656

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "servicess" /sc MINUTE /mo 7 /tr "'C:\Windows\inf\de-DE\services.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1660

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 8 /tr "'C:\Program Files (x86)\Microsoft Synchronization Services\ADO.NET\v1.0\winlogon.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1732

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "winlogon" /sc ONLOGON /tr "'C:\Program Files (x86)\Microsoft Synchronization Services\ADO.NET\v1.0\winlogon.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1992

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 13 /tr "'C:\Program Files (x86)\Microsoft Synchronization Services\ADO.NET\v1.0\winlogon.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1496

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 6 /tr "'C:\Windows\addins\Idle.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1260

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\Windows\addins\Idle.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:836

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 9 /tr "'C:\Windows\addins\Idle.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1504

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

Idle.exe

Path C:\Windows\addins\Idle.exe
Size 2.3MB
SHA256 faa426705d165290c5748fbd2d6022a4e269d704fb6dbb24d0167aea0741c3b8
MD5 7a3673360005748ae7855199875ffd75
SHA1 48a43a28451d85a04b6337e49a7c2a5fa026664e
SHA512 ef9366353f40f17986890e476c0ed4696177c8f710399b1fb8776cf4e5ba97dead2907778812a0305bbbe8e57b235d5c8a16e20af1683f9f82c3fb43d7c6656f
SSDEEP 49152:XkIOEDTD5PrzrO1FzQBt14rs/IiijcRLsc/sDBDf463fF:XlTlQrViijc9/sVDf463N
MD5 SHA1 SHA512 SSDEEP

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Idle.exe

Path C:\Windows\addins\Idle.exe
Size 2.3MB
SHA256 faa426705d165290c5748fbd2d6022a4e269d704fb6dbb24d0167aea0741c3b8
MD5 7a3673360005748ae7855199875ffd75
SHA1 48a43a28451d85a04b6337e49a7c2a5fa026664e
SHA512 ef9366353f40f17986890e476c0ed4696177c8f710399b1fb8776cf4e5ba97dead2907778812a0305bbbe8e57b235d5c8a16e20af1683f9f82c3fb43d7c6656f
SSDEEP 49152:XkIOEDTD5PrzrO1FzQBt14rs/IiijcRLsc/sDBDf463fF:XlTlQrViijc9/sVDf463N
MD5 SHA1 SHA512 SSDEEP

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memory/1512-65-0x0000000000230000-0x0000000000482000-memory.dmp

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memory/1936-54-0x00000000013C0000-0x0000000001612000-memory.dmp

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memory/1936-55-0x0000000000340000-0x0000000000348000-memory.dmp

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memory/1936-56-0x00000000006E0000-0x00000000006FC000-memory.dmp

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memory/1936-57-0x0000000000700000-0x0000000000716000-memory.dmp

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memory/1936-58-0x0000000000A60000-0x0000000000AB6000-memory.dmp

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memory/1936-59-0x0000000000350000-0x0000000000362000-memory.dmp

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memory/1936-60-0x0000000000450000-0x000000000045E000-memory.dmp

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memory/1936-61-0x00000000005C0000-0x00000000005C8000-memory.dmp

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