dcrat | 1d807f0c23384297333d3765556e891a0c25416ecb0eded242582896fa99290e

General

Target

1d807f0c23384297333d3765556e891a0c25416ecb0eded242582896fa99290e.exe
Size

828KB
MD5

0b59760b00daf4fc87ef9e87ba43682d
SHA1

8f441c65cc64c45792568d32042d5c3481821147
SHA256

1d807f0c23384297333d3765556e891a0c25416ecb0eded242582896fa99290e
SHA512

0b8f3a8ab1c7407455d9633f1bcac6174e4e31904ab8e41b204b0048c7bd28eb6abcc1cde5ddd785307081e45564d342d522a31f3a16cf798645129793145bbe
SSDEEP

12288:gR7Dy9/6x+hRJu+hxVv+0+QuP8AAKvELL/1SmIfR9YNpNHHQf2:wyt6x+BdG0+QsvELxSHzYlnJ

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

Process spawned unexpected child process 18 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	1864	4260	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2912	4260	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2440	4260	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4476	4260	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4856	4260	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1520	4260	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4836	4260	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1116	4260	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2924	4260	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2964	4260	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1848	4260	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	5000	4260	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	808	4260	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	640	4260	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2980	4260	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	5012	4260	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4416	4260	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	560	4260	schtasks.exe	83

DCRat payload 2 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral2/memory/3732-1-0x0000000000390000-0x0000000000466000-memory.dmp	dcrat
behavioral2/files/0x0007000000023cb0-11.dat	dcrat

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation	1d807f0c23384297333d3765556e891a0c25416ecb0eded242582896fa99290e.exe

Executes dropped EXE 1 IoCs

pid	Process
4468	OfficeClickToRun.exe

Drops file in Program Files directory 5 IoCs

description	ioc	Process
File created	C:\Program Files\Windows Photo Viewer\es-ES\ea1d8f6d871115	1d807f0c23384297333d3765556e891a0c25416ecb0eded242582896fa99290e.exe
File created	C:\Program Files\ModifiableWindowsApps\dwm.exe	1d807f0c23384297333d3765556e891a0c25416ecb0eded242582896fa99290e.exe
File created	C:\Program Files (x86)\Windows Multimedia Platform\TextInputHost.exe	1d807f0c23384297333d3765556e891a0c25416ecb0eded242582896fa99290e.exe
File created	C:\Program Files (x86)\Windows Multimedia Platform\22eafd247d37c3	1d807f0c23384297333d3765556e891a0c25416ecb0eded242582896fa99290e.exe
File created	C:\Program Files\Windows Photo Viewer\es-ES\upfc.exe	1d807f0c23384297333d3765556e891a0c25416ecb0eded242582896fa99290e.exe

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

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000_Classes\Local Settings	1d807f0c23384297333d3765556e891a0c25416ecb0eded242582896fa99290e.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 18 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
2964	schtasks.exe
5012	schtasks.exe
2912	schtasks.exe
1520	schtasks.exe
4836	schtasks.exe
2980	schtasks.exe
4416	schtasks.exe
1864	schtasks.exe
4476	schtasks.exe
808	schtasks.exe
5000	schtasks.exe
560	schtasks.exe
2440	schtasks.exe
4856	schtasks.exe
2924	schtasks.exe
1116	schtasks.exe
1848	schtasks.exe
640	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3732	1d807f0c23384297333d3765556e891a0c25416ecb0eded242582896fa99290e.exe
3732	1d807f0c23384297333d3765556e891a0c25416ecb0eded242582896fa99290e.exe
3732	1d807f0c23384297333d3765556e891a0c25416ecb0eded242582896fa99290e.exe
3732	1d807f0c23384297333d3765556e891a0c25416ecb0eded242582896fa99290e.exe
3732	1d807f0c23384297333d3765556e891a0c25416ecb0eded242582896fa99290e.exe
4468	OfficeClickToRun.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3732	1d807f0c23384297333d3765556e891a0c25416ecb0eded242582896fa99290e.exe
Token: SeDebugPrivilege	4468	OfficeClickToRun.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3732 wrote to memory of 4064	3732	1d807f0c23384297333d3765556e891a0c25416ecb0eded242582896fa99290e.exe	102
PID 3732 wrote to memory of 4064	3732	1d807f0c23384297333d3765556e891a0c25416ecb0eded242582896fa99290e.exe	102
PID 4064 wrote to memory of 3504	4064	cmd.exe	104
PID 4064 wrote to memory of 3504	4064	cmd.exe	104
PID 4064 wrote to memory of 4468	4064	cmd.exe	108
PID 4064 wrote to memory of 4468	4064	cmd.exe	108

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\1d807f0c23384297333d3765556e891a0c25416ecb0eded242582896fa99290e.exe
"C:\Users\Admin\AppData\Local\Temp\1d807f0c23384297333d3765556e891a0c25416ecb0eded242582896fa99290e.exe"
1⤵
- Checks computer location settings
- Drops file in Program Files directory
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3732
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\KlyHtYfLWv.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4064
- - C:\Windows\system32\w32tm.exe
    w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
    3⤵
    PID:3504
- - C:\Recovery\WindowsRE\OfficeClickToRun.exe
    "C:\Recovery\WindowsRE\OfficeClickToRun.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4468

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "OfficeClickToRunO" /sc MINUTE /mo 10 /tr "'C:\Recovery\WindowsRE\OfficeClickToRun.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1864

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "OfficeClickToRun" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\OfficeClickToRun.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2912

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "OfficeClickToRunO" /sc MINUTE /mo 14 /tr "'C:\Recovery\WindowsRE\OfficeClickToRun.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2440

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smsss" /sc MINUTE /mo 6 /tr "'C:\Recovery\WindowsRE\smss.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4476

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\smss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4856

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smsss" /sc MINUTE /mo 7 /tr "'C:\Recovery\WindowsRE\smss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1520

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "TextInputHostT" /sc MINUTE /mo 8 /tr "'C:\Program Files (x86)\Windows Multimedia Platform\TextInputHost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4836

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "TextInputHost" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Multimedia Platform\TextInputHost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1116

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "TextInputHostT" /sc MINUTE /mo 8 /tr "'C:\Program Files (x86)\Windows Multimedia Platform\TextInputHost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2924

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "upfcu" /sc MINUTE /mo 9 /tr "'C:\Program Files\Windows Photo Viewer\es-ES\upfc.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2964

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "upfc" /sc ONLOGON /tr "'C:\Program Files\Windows Photo Viewer\es-ES\upfc.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1848

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "upfcu" /sc MINUTE /mo 10 /tr "'C:\Program Files\Windows Photo Viewer\es-ES\upfc.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:5000

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SearchAppS" /sc MINUTE /mo 12 /tr "'C:\Recovery\WindowsRE\SearchApp.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:808

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SearchApp" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\SearchApp.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:640

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SearchAppS" /sc MINUTE /mo 11 /tr "'C:\Recovery\WindowsRE\SearchApp.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2980

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 6 /tr "'C:\Users\Default\RuntimeBroker.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:5012

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Users\Default\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4416

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 14 /tr "'C:\Users\Default\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:560

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Recovery\WindowsRE\SearchApp.exe

Filesize
828KB

MD5
0b59760b00daf4fc87ef9e87ba43682d

SHA1
8f441c65cc64c45792568d32042d5c3481821147

SHA256
1d807f0c23384297333d3765556e891a0c25416ecb0eded242582896fa99290e

SHA512
0b8f3a8ab1c7407455d9633f1bcac6174e4e31904ab8e41b204b0048c7bd28eb6abcc1cde5ddd785307081e45564d342d522a31f3a16cf798645129793145bbe

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

Filesize
207B

MD5
8e0e29651587b8d4d94bf177176a299e

SHA1
eb36d03e38572a8399660e25d3be00d5979666b8

SHA256
27380098b9fb1082430a6d16275dfe094195528edb99eed939ae5ce9cb0f0301

SHA512
6e4bbbd7a36faaab077a307924467cdfd818161fba16fbc3852bdfcce0ada72eeeb69a22668e0d4edd9d8d5df6c4a484e57d1b89c58d076262a7a5de2cd176e3

Download Submit
memory/3732-0-0x00007FFD8D803000-0x00007FFD8D805000-memory.dmp

Filesize
8KB

Download
memory/3732-1-0x0000000000390000-0x0000000000466000-memory.dmp

Filesize
856KB

Download
memory/3732-4-0x00007FFD8D800000-0x00007FFD8E2C1000-memory.dmp

Filesize
10.8MB

Download
memory/3732-20-0x00007FFD8D800000-0x00007FFD8E2C1000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads