dcrat | 5a76c4af4d3f402b6c5dbd4bdaf27fbce4f8c7dbeb37aa7360e2ef1412ecbf36

General

Target

bca88c932c62e07a93e63843fa98683c.exe
Size

864KB
MD5

bca88c932c62e07a93e63843fa98683c
SHA1

a32de96450ead432f934752f1d654a6b904f8800
SHA256

5a76c4af4d3f402b6c5dbd4bdaf27fbce4f8c7dbeb37aa7360e2ef1412ecbf36
SHA512

d5d06c4306c9c6aa1f1485f35e8f074da7c92fbfcac34080802650d0e52123c729cbdf1c5736ea0eb5f83b2b43f907ca28a59ae2e139467e4c1596464370427c
SSDEEP

12288:frdd+xFusWBUS2uBLxvWluhvWYpWw1zuNuHP1YHUPnnCBao:pdiusWxpxvW+y8vqH8nvo

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 12 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	2708	2616	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2628	2616	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2704	2616	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2492	2616	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3036	2616	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2572	2616	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2424	2616	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2476	2616	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3040	2616	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3008	2616	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2380	2616	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2808	2616	schtasks.exe	28

DCRat payload 3 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/memory/1728-0-0x0000000000DC0000-0x0000000000EA0000-memory.dmp	dcrat
behavioral1/files/0x003800000001471d-18.dat	dcrat
behavioral1/memory/1872-21-0x0000000001240000-0x0000000001320000-memory.dmp	dcrat

Executes dropped EXE 1 IoCs

pid	Process
1872	spoolsv.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
4	pastebin.com
5	pastebin.com

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files\Windows Media Player\Network Sharing\spoolsv.exe	bca88c932c62e07a93e63843fa98683c.exe
File created	C:\Program Files\Windows Media Player\Network Sharing\f3b6ecef712a24	bca88c932c62e07a93e63843fa98683c.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\ShellNew\dwm.exe	bca88c932c62e07a93e63843fa98683c.exe
File created	C:\Windows\ShellNew\6cb0b6c459d5d3	bca88c932c62e07a93e63843fa98683c.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 12 IoCs

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

persistence

Scheduled Task/Job

T1053

pid	Process
2708	schtasks.exe
3040	schtasks.exe
2380	schtasks.exe
2628	schtasks.exe
2704	schtasks.exe
2492	schtasks.exe
3036	schtasks.exe
2572	schtasks.exe
2424	schtasks.exe
2476	schtasks.exe
3008	schtasks.exe
2808	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1728	bca88c932c62e07a93e63843fa98683c.exe
1728	bca88c932c62e07a93e63843fa98683c.exe
1728	bca88c932c62e07a93e63843fa98683c.exe
1872	spoolsv.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1728	bca88c932c62e07a93e63843fa98683c.exe
Token: SeDebugPrivilege	1872	spoolsv.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1728 wrote to memory of 2952	1728	bca88c932c62e07a93e63843fa98683c.exe	41
PID 1728 wrote to memory of 2952	1728	bca88c932c62e07a93e63843fa98683c.exe	41
PID 1728 wrote to memory of 2952	1728	bca88c932c62e07a93e63843fa98683c.exe	41
PID 2952 wrote to memory of 2948	2952	cmd.exe	43
PID 2952 wrote to memory of 2948	2952	cmd.exe	43
PID 2952 wrote to memory of 2948	2952	cmd.exe	43
PID 2952 wrote to memory of 1872	2952	cmd.exe	44
PID 2952 wrote to memory of 1872	2952	cmd.exe	44
PID 2952 wrote to memory of 1872	2952	cmd.exe	44

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\bca88c932c62e07a93e63843fa98683c.exe
"C:\Users\Admin\AppData\Local\Temp\bca88c932c62e07a93e63843fa98683c.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:1728
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\ntPJIf1c0e.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2952
- - C:\Windows\system32\w32tm.exe
    w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
    3⤵
    PID:2948
- - C:\Program Files\Windows Media Player\Network Sharing\spoolsv.exe
    "C:\Program Files\Windows Media Player\Network Sharing\spoolsv.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1872

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsml" /sc MINUTE /mo 11 /tr "'C:\Recovery\5b7985c2-d100-11ee-bb00-c695cbc44580\lsm.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2708

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsm" /sc ONLOGON /tr "'C:\Recovery\5b7985c2-d100-11ee-bb00-c695cbc44580\lsm.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2628

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsml" /sc MINUTE /mo 5 /tr "'C:\Recovery\5b7985c2-d100-11ee-bb00-c695cbc44580\lsm.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2704

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 13 /tr "'C:\Recovery\5b7985c2-d100-11ee-bb00-c695cbc44580\Idle.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2492

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\Recovery\5b7985c2-d100-11ee-bb00-c695cbc44580\Idle.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:3036

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 5 /tr "'C:\Recovery\5b7985c2-d100-11ee-bb00-c695cbc44580\Idle.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2572

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 5 /tr "'C:\Program Files\Windows Media Player\Network Sharing\spoolsv.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2424

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Program Files\Windows Media Player\Network Sharing\spoolsv.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2476

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 8 /tr "'C:\Program Files\Windows Media Player\Network Sharing\spoolsv.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:3040

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 13 /tr "'C:\Windows\ShellNew\dwm.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:3008

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dwm" /sc ONLOGON /tr "'C:\Windows\ShellNew\dwm.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2380

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 14 /tr "'C:\Windows\ShellNew\dwm.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2808

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

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\Program Files\Windows Media Player\Network Sharing\spoolsv.exe

Filesize
864KB

MD5
bca88c932c62e07a93e63843fa98683c

SHA1
a32de96450ead432f934752f1d654a6b904f8800

SHA256
5a76c4af4d3f402b6c5dbd4bdaf27fbce4f8c7dbeb37aa7360e2ef1412ecbf36

SHA512
d5d06c4306c9c6aa1f1485f35e8f074da7c92fbfcac34080802650d0e52123c729cbdf1c5736ea0eb5f83b2b43f907ca28a59ae2e139467e4c1596464370427c

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015

Filesize
68KB

MD5
29f65ba8e88c063813cc50a4ea544e93

SHA1
05a7040d5c127e68c25d81cc51271ffb8bef3568

SHA256
1ed81fa8dfb6999a9fedc6e779138ffd99568992e22d300acd181a6d2c8de184

SHA512
e29b2e92c496245bed3372578074407e8ef8882906ce10c35b3c8deebfefe01b5fd7f3030acaa693e175f4b7aca6cd7d8d10ae1c731b09c5fa19035e005de3aa

Download Submit
C:\Users\Admin\AppData\Local\Temp\Tar5AF3.tmp

Filesize
177KB

MD5
435a9ac180383f9fa094131b173a2f7b

SHA1
76944ea657a9db94f9a4bef38f88c46ed4166983

SHA256
67dc37ed50b8e63272b49a254a6039ee225974f1d767bb83eb1fd80e759a7c34

SHA512
1a6b277611959720a9c71114957620517ad94541302f164eb872bd322292a952409bafb8bc2ac793b16ad5f25d83f8594ccff2b7834e3c2b2b941e6fc84c009a

Download Submit
C:\Users\Admin\AppData\Local\Temp\ntPJIf1c0e.bat

Filesize
230B

MD5
3f7b8eed0e75c79839a0886fd39bce91

SHA1
529cbbb1b600d186a7c135e7d758863cfa215c42

SHA256
e64cf761f8a2a75960faeecd5c5f51809c53d4799dc87fb9164e5c86c97a0ba2

SHA512
1ccf91f3191200257e420d6ac916d6338160160172ebcabb2ad6d7cc350b6fb1f9981336c2517e181bf9c462e88b52698450042980948889aaadfc84fdbff97a

Download Submit
memory/1728-3-0x00000000001E0000-0x00000000001EA000-memory.dmp

Filesize
40KB

Download
memory/1728-17-0x000007FEF5C50000-0x000007FEF663C000-memory.dmp

Filesize
9.9MB

Download
memory/1728-0-0x0000000000DC0000-0x0000000000EA0000-memory.dmp

Filesize
896KB

Download
memory/1728-2-0x0000000000C00000-0x0000000000C80000-memory.dmp

Filesize
512KB

Download
memory/1728-1-0x000007FEF5C50000-0x000007FEF663C000-memory.dmp

Filesize
9.9MB

Download
memory/1872-21-0x0000000001240000-0x0000000001320000-memory.dmp

Filesize
896KB

Download
memory/1872-20-0x000007FEF5260000-0x000007FEF5C4C000-memory.dmp

Filesize
9.9MB

Download
memory/1872-22-0x000000001B070000-0x000000001B0F0000-memory.dmp

Filesize
512KB

Download
memory/1872-60-0x000007FEF5260000-0x000007FEF5C4C000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads