dcrat | 6d46b5019e2ff15d922d83d923dc3d97490a7e4e6e14d263db67d8a72bf64849

Analysis

max time kernel
125s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
03-02-2023 07:26

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General

Target

6d46b5019e2ff15d922d83d923dc3d97490a7e4e6e14d263db67d8a72bf64849.exe
Size

1.3MB
MD5

905982c49891112cb3b7dd232cf94f5a
SHA1

c002947be363ddaf875037a8687cb2fcd9f35574
SHA256

6d46b5019e2ff15d922d83d923dc3d97490a7e4e6e14d263db67d8a72bf64849
SHA512

e761513b440e5e38ed6af5917ae5da1d58bfa6cab2615943e158055430d0a47e0b82ef50c10dde5cb5ca3312b98045deef1cc40e1a836c650c95500af1f87da1
SSDEEP

24576:U2G/nvxW3Ww0t6TnzGmVBDh4+aknuRRZJND0gFJ4rD/IjC:UbA30GnzV/q+DnsXg

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 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	1452	1664	schtasks.exe	70
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2448	1664	schtasks.exe	70
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2260	1664	schtasks.exe	70
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2040	1664	schtasks.exe	70
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3860	1664	schtasks.exe	70
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3276	1664	schtasks.exe	70

DCRat payload 5 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/files/0x0002000000022e4a-137.dat	dcrat
behavioral1/files/0x0002000000022e4a-138.dat	dcrat
behavioral1/memory/1752-139-0x0000000000A40000-0x0000000000B50000-memory.dmp	dcrat
behavioral1/files/0x0002000000022e50-146.dat	dcrat
behavioral1/files/0x0002000000022e50-145.dat	dcrat

Checks computer location settings 2 TTPs 3 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-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	6d46b5019e2ff15d922d83d923dc3d97490a7e4e6e14d263db67d8a72bf64849.exe
Key value queried	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	WScript.exe
Key value queried	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	DllCommonsvc.exe

Executes dropped EXE 2 IoCs

pid	Process
1752	DllCommonsvc.exe
3088	dllhost.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102
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 6 IoCs

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

persistence

Scheduled Task

T1053

pid	Process
1452	schtasks.exe
2448	schtasks.exe
2260	schtasks.exe
2040	schtasks.exe
3860	schtasks.exe
3276	schtasks.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000_Classes\Local Settings	6d46b5019e2ff15d922d83d923dc3d97490a7e4e6e14d263db67d8a72bf64849.exe

Suspicious behavior: EnumeratesProcesses 16 IoCs

pid	Process
1752	DllCommonsvc.exe
3748	powershell.exe
3820	powershell.exe
4248	powershell.exe
3748	powershell.exe
3088	dllhost.exe
4248	powershell.exe
3820	powershell.exe
3088	dllhost.exe
3088	dllhost.exe
3088	dllhost.exe
3088	dllhost.exe
3088	dllhost.exe
3088	dllhost.exe
3088	dllhost.exe
3088	dllhost.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
3088	dllhost.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	1752	DllCommonsvc.exe
Token: SeDebugPrivilege	3748	powershell.exe
Token: SeDebugPrivilege	3820	powershell.exe
Token: SeDebugPrivilege	4248	powershell.exe
Token: SeDebugPrivilege	3088	dllhost.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 5060 wrote to memory of 3616	5060	6d46b5019e2ff15d922d83d923dc3d97490a7e4e6e14d263db67d8a72bf64849.exe	82
PID 5060 wrote to memory of 3616	5060	6d46b5019e2ff15d922d83d923dc3d97490a7e4e6e14d263db67d8a72bf64849.exe	82
PID 5060 wrote to memory of 3616	5060	6d46b5019e2ff15d922d83d923dc3d97490a7e4e6e14d263db67d8a72bf64849.exe	82
PID 3616 wrote to memory of 3300	3616	WScript.exe	83
PID 3616 wrote to memory of 3300	3616	WScript.exe	83
PID 3616 wrote to memory of 3300	3616	WScript.exe	83
PID 3300 wrote to memory of 1752	3300	cmd.exe	85
PID 3300 wrote to memory of 1752	3300	cmd.exe	85
PID 1752 wrote to memory of 3748	1752	DllCommonsvc.exe	92
PID 1752 wrote to memory of 3748	1752	DllCommonsvc.exe	92
PID 1752 wrote to memory of 3820	1752	DllCommonsvc.exe	97
PID 1752 wrote to memory of 3820	1752	DllCommonsvc.exe	97
PID 1752 wrote to memory of 4248	1752	DllCommonsvc.exe	95
PID 1752 wrote to memory of 4248	1752	DllCommonsvc.exe	95
PID 1752 wrote to memory of 3088	1752	DllCommonsvc.exe	98
PID 1752 wrote to memory of 3088	1752	DllCommonsvc.exe	98

C:\Users\Admin\AppData\Local\Temp\6d46b5019e2ff15d922d83d923dc3d97490a7e4e6e14d263db67d8a72bf64849.exe
"C:\Users\Admin\AppData\Local\Temp\6d46b5019e2ff15d922d83d923dc3d97490a7e4e6e14d263db67d8a72bf64849.exe"
1⤵
- Checks computer location settings
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:5060
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\providercommon\yTUdeXjbLOhnrN32dgrxVg.vbe"
  2⤵
  - Checks computer location settings
  - Suspicious use of WriteProcessMemory
  PID:3616
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\providercommon\1zu9dW.bat" "
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3300
  - - C:\providercommon\DllCommonsvc.exe
      "C:\providercommon\DllCommonsvc.exe"
      4⤵
      Checks computer location settings
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:1752
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\providercommon\DllCommonsvc.exe'
        5⤵
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:3748
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Recovery\WindowsRE\dllhost.exe'
        5⤵
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:4248
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Users\Default User\csrss.exe'
        5⤵
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:3820
    - - C:\Recovery\WindowsRE\dllhost.exe
        
        "C:\Recovery\WindowsRE\dllhost.exe"
        5⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        Suspicious behavior: GetForegroundWindowSpam
        Suspicious use of AdjustPrivilegeToken
        
        PID:3088

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 5 /tr "'C:\Users\Default User\csrss.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1452

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Users\Default User\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2448

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 7 /tr "'C:\Users\Default User\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2260

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 5 /tr "'C:\Recovery\WindowsRE\dllhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2040

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:3860

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 10 /tr "'C:\Recovery\WindowsRE\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:3276

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Web Service

T1102

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

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Downloads

C:\Recovery\WindowsRE\dllhost.exe

Filesize
1.0MB

MD5
bd31e94b4143c4ce49c17d3af46bcad0

SHA1
f8c51ff3ff909531d9469d4ba1bbabae101853ff

SHA256
b5199d3eb28e7de8ec4a5de66cb339a03d90b297e2292473badaab98ade15c63

SHA512
f96658bd19b672fd84038bd7e95c89e14f4e6f84e3ce9c6fe3216861a41203406148c6a809c2ab350d0d6c5919c845f619deb1fc9b1f1814dfce87e566bc2394

Download Submit
C:\Recovery\WindowsRE\dllhost.exe

Filesize
1.0MB

MD5
bd31e94b4143c4ce49c17d3af46bcad0

SHA1
f8c51ff3ff909531d9469d4ba1bbabae101853ff

SHA256
b5199d3eb28e7de8ec4a5de66cb339a03d90b297e2292473badaab98ade15c63

SHA512
f96658bd19b672fd84038bd7e95c89e14f4e6f84e3ce9c6fe3216861a41203406148c6a809c2ab350d0d6c5919c845f619deb1fc9b1f1814dfce87e566bc2394

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
3a6bad9528f8e23fb5c77fbd81fa28e8

SHA1
f127317c3bc6407f536c0f0600dcbcf1aabfba36

SHA256
986366767de5873f1b170a63f2a33ce05132d1afd90c8f5017afbca8ef1beb05

SHA512
846002154a0ece6f3e9feda6f115d3161dc21b3789525dd62ae1d9188495171293efdbe7be4710666dd8a15e66b557315b5a02918a741ed1d5f3ff0c515b98e2

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
496B

MD5
a3622e12ac7f36a4e9155595caddaba9

SHA1
98c45d9cd5df7cd43232d1c59e3c578152d3fb1d

SHA256
f811710e0022af82463534fe4599b12a04c77a3b4d7014169b9025c7b1ea3e85

SHA512
b7547f1a8950e5598d1cc9067ab7ee35fff6f93aeae5c23c12818eee7be3ded3773173d3fc0003904f046fc0b6ff791980137d68751801fc0dad7a39edba8a66

Download Submit
C:\providercommon\1zu9dW.bat

Filesize
36B

MD5
6783c3ee07c7d151ceac57f1f9c8bed7

SHA1
17468f98f95bf504cc1f83c49e49a78526b3ea03

SHA256
8ab782f0f327a2021530e7230d3aee8abbecb7eed59482a3a46e78b9e3862322

SHA512
c6012d4bfac1ed14d0fd9f0eabd0e1c3d647b343db292a907b246271d52a4b7469c809db43910ddba2e8c5045f9cb3d24d0af62d363281e6cb8b39ee94a183e8

Download Submit
C:\providercommon\DllCommonsvc.exe

Filesize
1.0MB

MD5
bd31e94b4143c4ce49c17d3af46bcad0

SHA1
f8c51ff3ff909531d9469d4ba1bbabae101853ff

SHA256
b5199d3eb28e7de8ec4a5de66cb339a03d90b297e2292473badaab98ade15c63

SHA512
f96658bd19b672fd84038bd7e95c89e14f4e6f84e3ce9c6fe3216861a41203406148c6a809c2ab350d0d6c5919c845f619deb1fc9b1f1814dfce87e566bc2394

Download Submit
C:\providercommon\DllCommonsvc.exe

Filesize
1.0MB

MD5
bd31e94b4143c4ce49c17d3af46bcad0

SHA1
f8c51ff3ff909531d9469d4ba1bbabae101853ff

SHA256
b5199d3eb28e7de8ec4a5de66cb339a03d90b297e2292473badaab98ade15c63

SHA512
f96658bd19b672fd84038bd7e95c89e14f4e6f84e3ce9c6fe3216861a41203406148c6a809c2ab350d0d6c5919c845f619deb1fc9b1f1814dfce87e566bc2394

Download Submit
C:\providercommon\yTUdeXjbLOhnrN32dgrxVg.vbe

Filesize
197B

MD5
8088241160261560a02c84025d107592

SHA1
083121f7027557570994c9fc211df61730455bb5

SHA256
2072cc9a4a3b84d4c5178ab41c5588eea7d0103e3928e34d64f17bf97f3d1cc1

SHA512
20d9369dd359315848ea30144383a0bb479d86059fdbc3b3256ac84f998193512feb3b1799ab663619920c99fe7e0ebba33ada31a3855094b956fcd351c90478

Download Submit
memory/1752-140-0x00007FFF3BA70000-0x00007FFF3C531000-memory.dmp

Filesize
10.8MB

Download
memory/1752-139-0x0000000000A40000-0x0000000000B50000-memory.dmp

Filesize
1.1MB

Download
memory/1752-148-0x00007FFF3BA70000-0x00007FFF3C531000-memory.dmp

Filesize
10.8MB

Download
memory/1752-136-0x0000000000000000-mapping.dmp

Download
memory/3088-152-0x00007FFF3BA70000-0x00007FFF3C531000-memory.dmp

Filesize
10.8MB

Download
memory/3088-144-0x0000000000000000-mapping.dmp

Download
memory/3088-159-0x00007FFF3BA70000-0x00007FFF3C531000-memory.dmp

Filesize
10.8MB

Download
memory/3300-135-0x0000000000000000-mapping.dmp

Download
memory/3616-132-0x0000000000000000-mapping.dmp

Download
memory/3748-149-0x00007FFF3BA70000-0x00007FFF3C531000-memory.dmp

Filesize
10.8MB

Download
memory/3748-156-0x00007FFF3BA70000-0x00007FFF3C531000-memory.dmp

Filesize
10.8MB

Download
memory/3748-141-0x0000000000000000-mapping.dmp

Download
memory/3748-147-0x00000262E9000000-0x00000262E9022000-memory.dmp

Filesize
136KB

Download
memory/3820-150-0x00007FFF3BA70000-0x00007FFF3C531000-memory.dmp

Filesize
10.8MB

Download
memory/3820-142-0x0000000000000000-mapping.dmp

Download
memory/3820-158-0x00007FFF3BA70000-0x00007FFF3C531000-memory.dmp

Filesize
10.8MB

Download
memory/4248-151-0x00007FFF3BA70000-0x00007FFF3C531000-memory.dmp

Filesize
10.8MB

Download
memory/4248-143-0x0000000000000000-mapping.dmp

Download
memory/4248-155-0x00007FFF3BA70000-0x00007FFF3C531000-memory.dmp

Filesize
10.8MB

Download