dcrat | 77c5f17e97ac13be2f3b9f632d2a1cea5a17b598b533840d2996985d218445fe

General

Target

AnyDesk.exe.exe
Size

1.1MB
MD5

3f3906f8ced4518fe1f773cc8539c00a
SHA1

5910cb6fac241a38403053e54091c1260ac99b76
SHA256

77c5f17e97ac13be2f3b9f632d2a1cea5a17b598b533840d2996985d218445fe
SHA512

4e5e3750cf93f3f46b2916b8aa9ddd9cc5c1098d003875f48a5fa20cc963a6ffb4a297c008679b38cc8d2512009bf34c9f802fc0ace22dc0d32dd2abd5bdc2ec
SSDEEP

12288:aRZ+IoG/n9IQxW3OBsee2X+t4RbG8xAWZvo/WmZmzoCALJRWNutN4C99ZxzNxiTd:U2G/nvxW3Ww0tzZvo/EzouCRxq55R

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 21 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	2804	2572	schtasks.exe	32
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2368	2572	schtasks.exe	32
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2668	2572	schtasks.exe	32
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2764	2572	schtasks.exe	32
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2500	2572	schtasks.exe	32
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2404	2572	schtasks.exe	32
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2356	2572	schtasks.exe	32
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2428	2572	schtasks.exe	32
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2964	2572	schtasks.exe	32
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1492	2572	schtasks.exe	32
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1060	2572	schtasks.exe	32
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2692	2572	schtasks.exe	32
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2756	2572	schtasks.exe	32
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2256	2572	schtasks.exe	32
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2596	2572	schtasks.exe	32
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2348	2572	schtasks.exe	32
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2580	2572	schtasks.exe	32
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2688	2572	schtasks.exe	32
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2752	2572	schtasks.exe	32
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2032	2572	schtasks.exe	32
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1648	2572	schtasks.exe	32

DCRat payload 3 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/files/0x0008000000014185-12.dat	dcrat
behavioral1/memory/2120-13-0x00000000003E0000-0x00000000004B6000-memory.dmp	dcrat
behavioral1/memory/1644-34-0x00000000010F0000-0x00000000011C6000-memory.dmp	dcrat

Executes dropped EXE 2 IoCs

pid	Process
2120	Perfdhcp.exe
1644	explorer.exe

Loads dropped DLL 2 IoCs

pid	Process
2132	cmd.exe
2132	cmd.exe

Drops file in Program Files directory 9 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Common Files\SpeechEngines\56085415360792	Perfdhcp.exe
File created	C:\Program Files (x86)\Windows Portable Devices\explorer.exe	Perfdhcp.exe
File created	C:\Program Files (x86)\Windows Portable Devices\7a0fd90576e088	Perfdhcp.exe
File created	C:\Program Files (x86)\Microsoft Office\conhost.exe	Perfdhcp.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\conhost.exe	Perfdhcp.exe
File created	C:\Program Files\Windows Journal\ja-JP\f3b6ecef712a24	Perfdhcp.exe
File created	C:\Program Files (x86)\Common Files\SpeechEngines\wininit.exe	Perfdhcp.exe
File created	C:\Program Files (x86)\Microsoft Office\088424020bedd6	Perfdhcp.exe
File created	C:\Program Files\Windows Journal\ja-JP\spoolsv.exe	Perfdhcp.exe

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 21 IoCs

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

persistence

Scheduled Task/Job

T1053

pid	Process
2752	schtasks.exe
2668	schtasks.exe
2428	schtasks.exe
2756	schtasks.exe
2256	schtasks.exe
2804	schtasks.exe
2368	schtasks.exe
2764	schtasks.exe
2348	schtasks.exe
2580	schtasks.exe
1648	schtasks.exe
2404	schtasks.exe
2964	schtasks.exe
1492	schtasks.exe
2596	schtasks.exe
2688	schtasks.exe
2032	schtasks.exe
2500	schtasks.exe
2356	schtasks.exe
1060	schtasks.exe
2692	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2120	Perfdhcp.exe
2120	Perfdhcp.exe
2120	Perfdhcp.exe
1644	explorer.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2120	Perfdhcp.exe
Token: SeDebugPrivilege	1644	explorer.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2176 wrote to memory of 1724	2176	AnyDesk.exe.exe	28
PID 2176 wrote to memory of 1724	2176	AnyDesk.exe.exe	28
PID 2176 wrote to memory of 1724	2176	AnyDesk.exe.exe	28
PID 2176 wrote to memory of 1724	2176	AnyDesk.exe.exe	28
PID 1724 wrote to memory of 2132	1724	WScript.exe	29
PID 1724 wrote to memory of 2132	1724	WScript.exe	29
PID 1724 wrote to memory of 2132	1724	WScript.exe	29
PID 1724 wrote to memory of 2132	1724	WScript.exe	29
PID 2132 wrote to memory of 2120	2132	cmd.exe	31
PID 2132 wrote to memory of 2120	2132	cmd.exe	31
PID 2132 wrote to memory of 2120	2132	cmd.exe	31
PID 2132 wrote to memory of 2120	2132	cmd.exe	31
PID 2120 wrote to memory of 1644	2120	Perfdhcp.exe	54
PID 2120 wrote to memory of 1644	2120	Perfdhcp.exe	54
PID 2120 wrote to memory of 1644	2120	Perfdhcp.exe	54

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\AnyDesk.exe.exe
"C:\Users\Admin\AppData\Local\Temp\AnyDesk.exe.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2176
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\ServerSaves\xEkSKuT.vbe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1724
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\ServerSaves\9utlu4N9jMYY.bat" "
    3⤵
    - Loads dropped DLL
    - Suspicious use of WriteProcessMemory
    PID:2132
  - - C:\ServerSaves\Perfdhcp.exe
      "C:\ServerSaves\Perfdhcp.exe"
      4⤵
      Executes dropped EXE
      Drops file in Program Files directory
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:2120
    - - C:\Program Files (x86)\Windows Portable Devices\explorer.exe
        
        "C:\Program Files (x86)\Windows Portable Devices\explorer.exe"
        5⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:1644

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "conhostc" /sc MINUTE /mo 9 /tr "'C:\Program Files (x86)\Microsoft Office\conhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2804

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "conhost" /sc ONLOGON /tr "'C:\Program Files (x86)\Microsoft Office\conhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2368

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "conhostc" /sc MINUTE /mo 7 /tr "'C:\Program Files (x86)\Microsoft Office\conhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2668

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 7 /tr "'C:\Program Files\Windows Journal\ja-JP\spoolsv.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2764

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Program Files\Windows Journal\ja-JP\spoolsv.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2500

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 8 /tr "'C:\Program Files\Windows Journal\ja-JP\spoolsv.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2404

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 12 /tr "'C:\Program Files (x86)\Common Files\SpeechEngines\wininit.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2356

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Program Files (x86)\Common Files\SpeechEngines\wininit.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2428

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 8 /tr "'C:\Program Files (x86)\Common Files\SpeechEngines\wininit.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2964

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "PerfdhcpP" /sc MINUTE /mo 13 /tr "'C:\Recovery\5b7985c2-d100-11ee-bb00-c695cbc44580\Perfdhcp.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1492

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "Perfdhcp" /sc ONLOGON /tr "'C:\Recovery\5b7985c2-d100-11ee-bb00-c695cbc44580\Perfdhcp.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1060

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "PerfdhcpP" /sc MINUTE /mo 11 /tr "'C:\Recovery\5b7985c2-d100-11ee-bb00-c695cbc44580\Perfdhcp.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2692

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsml" /sc MINUTE /mo 5 /tr "'C:\Users\Admin\Application Data\lsm.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2756

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsm" /sc ONLOGON /tr "'C:\Users\Admin\Application Data\lsm.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2256

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsml" /sc MINUTE /mo 13 /tr "'C:\Users\Admin\Application Data\lsm.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2596

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "cmdc" /sc MINUTE /mo 7 /tr "'C:\ServerSaves\cmd.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2348

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "cmd" /sc ONLOGON /tr "'C:\ServerSaves\cmd.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2580

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "cmdc" /sc MINUTE /mo 14 /tr "'C:\ServerSaves\cmd.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2688

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorere" /sc MINUTE /mo 9 /tr "'C:\Program Files (x86)\Windows Portable Devices\explorer.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2752

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Portable Devices\explorer.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2032

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorere" /sc MINUTE /mo 14 /tr "'C:\Program Files (x86)\Windows Portable Devices\explorer.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1648

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Scheduled Task/Job

1

T1053

Privilege Escalation

Scheduled Task/Job

1

T1053

Defense Evasion

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:\ServerSaves\9utlu4N9jMYY.bat

Filesize
29B

MD5
e7df233b682d7f6e42b14eb701f9a9e7

SHA1
37b15dd8d912859ad04fb2b211b61aedb8467a96

SHA256
c1d207f5f0ae71cf9842d7ed133a6ecde862459423a20d525a75e1745050b51f

SHA512
0b3151e241a8718e649c50a6c5f13c403689ea048a98d4f369e9db49f5a96576fdf3a1d80a9cbc4cafef217416bea71d3130adb707f204f32eef229da9362d7b

Download Submit
C:\ServerSaves\Perfdhcp.exe

Filesize
827KB

MD5
af544acc9123c753c94da56296c6a1fc

SHA1
416f6f28bd3c92a9a9d78973104c203667896f3e

SHA256
7503e7b46f9c46b16c8598f647b1a9bb75e8d7b8e534fc7042c72693b1cbdc7f

SHA512
90db52192ad0b6e736f544754e07fea5f4836e70785949547929772a75a5d00ba686c0dc0db263948a9f79b5611c9d9202090ff44df78bd023931546d8a3e288

Download Submit
C:\ServerSaves\xEkSKuT.vbe

Filesize
200B

MD5
3f3e10474645632811ac1e556e32c820

SHA1
afd8bcc7639a38454334c8b4a7cde9969205211e

SHA256
15fd3d8f2a1e798de4d2ee0aa77c91ff7bf63444e94cfbda07fca0b0636e3d4a

SHA512
e435ddd64862b10746c1a07d9658f6173f23cf92c573732731617112653395c647138cf75631739bc4050a421908863caceb8b547054ef9dfb4cb98b5ad4a7b6

Download Submit
memory/1644-34-0x00000000010F0000-0x00000000011C6000-memory.dmp

Filesize
856KB

Download
memory/2120-13-0x00000000003E0000-0x00000000004B6000-memory.dmp

Filesize
856KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads