dcrat | a23abaec990907ef2ae7842ac7041a4c61934ed9acdfd023586d2bab3f8a3aa0

Analysis

max time kernel
130s
max time network
161s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
03/02/2023, 09:27

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General

Target

a23abaec990907ef2ae7842ac7041a4c61934ed9acdfd023586d2bab3f8a3aa0.exe
Size

1.3MB
MD5

75d94d9c4b5f51c0d858642511e73a11
SHA1

b195f029c43665db1e6bda1ff2e2ad3296cee307
SHA256

a23abaec990907ef2ae7842ac7041a4c61934ed9acdfd023586d2bab3f8a3aa0
SHA512

c0815f1670e04becfbe8e3bf681040e71e26bdc1508efbaa04b135a0a6c2c856236b7f3ec00f298d22f09a28df2b0a4103a0a5e5eb59ba037934c7c6a3304340
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 9 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	2152	4592	schtasks.exe	29
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3692	4592	schtasks.exe	29
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4308	4592	schtasks.exe	29
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2268	4592	schtasks.exe	29
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	5084	4592	schtasks.exe	29
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4108	4592	schtasks.exe	29
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1544	4592	schtasks.exe	29
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1536	4592	schtasks.exe	29
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3528	4592	schtasks.exe	29

DCRat payload 5 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/files/0x0006000000023176-138.dat	dcrat
behavioral1/files/0x0006000000023176-139.dat	dcrat
behavioral1/memory/3592-140-0x00000000008B0000-0x00000000009C0000-memory.dmp	dcrat
behavioral1/files/0x000600000002317a-162.dat	dcrat
behavioral1/files/0x000600000002317a-163.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-1-5-21-4246620582-653642754-1174164128-1000\Control Panel\International\Geo\Nation	a23abaec990907ef2ae7842ac7041a4c61934ed9acdfd023586d2bab3f8a3aa0.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\Control Panel\International\Geo\Nation	WScript.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\Control Panel\International\Geo\Nation	DllCommonsvc.exe

Executes dropped EXE 2 IoCs

pid	Process
3592	DllCommonsvc.exe
1356	SearchApp.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 9 IoCs

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

persistence

Scheduled Task

T1053

pid	Process
3692	schtasks.exe
2268	schtasks.exe
5084	schtasks.exe
4108	schtasks.exe
1544	schtasks.exe
1536	schtasks.exe
3528	schtasks.exe
2152	schtasks.exe
4308	schtasks.exe

Modifies registry class 2 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000_Classes\Local Settings	a23abaec990907ef2ae7842ac7041a4c61934ed9acdfd023586d2bab3f8a3aa0.exe
Key created	\REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000_Classes\Local Settings	DllCommonsvc.exe

Suspicious behavior: EnumeratesProcesses 30 IoCs

pid	Process
3592	DllCommonsvc.exe
3592	DllCommonsvc.exe
3592	DllCommonsvc.exe
3592	DllCommonsvc.exe
3592	DllCommonsvc.exe
3592	DllCommonsvc.exe
3592	DllCommonsvc.exe
3592	DllCommonsvc.exe
3592	DllCommonsvc.exe
3592	DllCommonsvc.exe
3592	DllCommonsvc.exe
3592	DllCommonsvc.exe
3592	DllCommonsvc.exe
3380	powershell.exe
2580	powershell.exe
3696	powershell.exe
5060	powershell.exe
3696	powershell.exe
5060	powershell.exe
3380	powershell.exe
2580	powershell.exe
1356	SearchApp.exe
1356	SearchApp.exe
1356	SearchApp.exe
1356	SearchApp.exe
1356	SearchApp.exe
1356	SearchApp.exe
1356	SearchApp.exe
1356	SearchApp.exe
1356	SearchApp.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	3592	DllCommonsvc.exe
Token: SeDebugPrivilege	3380	powershell.exe
Token: SeDebugPrivilege	2580	powershell.exe
Token: SeDebugPrivilege	3696	powershell.exe
Token: SeDebugPrivilege	5060	powershell.exe
Token: SeDebugPrivilege	1356	SearchApp.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 3376 wrote to memory of 1692	3376	a23abaec990907ef2ae7842ac7041a4c61934ed9acdfd023586d2bab3f8a3aa0.exe	80
PID 3376 wrote to memory of 1692	3376	a23abaec990907ef2ae7842ac7041a4c61934ed9acdfd023586d2bab3f8a3aa0.exe	80
PID 3376 wrote to memory of 1692	3376	a23abaec990907ef2ae7842ac7041a4c61934ed9acdfd023586d2bab3f8a3aa0.exe	80
PID 1692 wrote to memory of 3596	1692	WScript.exe	81
PID 1692 wrote to memory of 3596	1692	WScript.exe	81
PID 1692 wrote to memory of 3596	1692	WScript.exe	81
PID 3596 wrote to memory of 3592	3596	cmd.exe	83
PID 3596 wrote to memory of 3592	3596	cmd.exe	83
PID 3592 wrote to memory of 5060	3592	DllCommonsvc.exe	93
PID 3592 wrote to memory of 5060	3592	DllCommonsvc.exe	93
PID 3592 wrote to memory of 3696	3592	DllCommonsvc.exe	95
PID 3592 wrote to memory of 3696	3592	DllCommonsvc.exe	95
PID 3592 wrote to memory of 3380	3592	DllCommonsvc.exe	100
PID 3592 wrote to memory of 3380	3592	DllCommonsvc.exe	100
PID 3592 wrote to memory of 2580	3592	DllCommonsvc.exe	99
PID 3592 wrote to memory of 2580	3592	DllCommonsvc.exe	99
PID 3592 wrote to memory of 4844	3592	DllCommonsvc.exe	101
PID 3592 wrote to memory of 4844	3592	DllCommonsvc.exe	101
PID 4844 wrote to memory of 2272	4844	cmd.exe	103
PID 4844 wrote to memory of 2272	4844	cmd.exe	103
PID 4844 wrote to memory of 1356	4844	cmd.exe	104
PID 4844 wrote to memory of 1356	4844	cmd.exe	104

C:\Users\Admin\AppData\Local\Temp\a23abaec990907ef2ae7842ac7041a4c61934ed9acdfd023586d2bab3f8a3aa0.exe
"C:\Users\Admin\AppData\Local\Temp\a23abaec990907ef2ae7842ac7041a4c61934ed9acdfd023586d2bab3f8a3aa0.exe"
1⤵
- Checks computer location settings
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:3376
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\providercommon\yTUdeXjbLOhnrN32dgrxVg.vbe"
  2⤵
  - Checks computer location settings
  - Suspicious use of WriteProcessMemory
  PID:1692
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\providercommon\1zu9dW.bat" "
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3596
  - - C:\providercommon\DllCommonsvc.exe
      "C:\providercommon\DllCommonsvc.exe"
      4⤵
      Checks computer location settings
      Executes dropped EXE
      Modifies registry class
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:3592
    - - 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:5060
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Recovery\WindowsRE\smss.exe'
        5⤵
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:3696
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\odt\RuntimeBroker.exe'
        5⤵
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:2580
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Users\Default User\SearchApp.exe'
        5⤵
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:3380
    - - C:\Windows\System32\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\D96KjH3TUw.bat"
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:4844
      - C:\Windows\system32\w32tm.exe
        
        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
        6⤵
        
        PID:2272
      - C:\Users\Default User\SearchApp.exe
        
        "C:\Users\Default User\SearchApp.exe"
        6⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:1356

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smsss" /sc MINUTE /mo 14 /tr "'C:\Recovery\WindowsRE\smss.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2152

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
- Creates scheduled task(s)
PID:3692

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smsss" /sc MINUTE /mo 10 /tr "'C:\Recovery\WindowsRE\smss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:4308

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SearchAppS" /sc MINUTE /mo 9 /tr "'C:\Users\Default User\SearchApp.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2268

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SearchApp" /sc ONLOGON /tr "'C:\Users\Default User\SearchApp.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:5084

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SearchAppS" /sc MINUTE /mo 5 /tr "'C:\Users\Default User\SearchApp.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:4108

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 9 /tr "'C:\odt\RuntimeBroker.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1544

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\odt\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1536

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 13 /tr "'C:\odt\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:3528

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

Replay Monitor

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Downloads

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
6d42b6da621e8df5674e26b799c8e2aa

SHA1
ab3ce1327ea1eeedb987ec823d5e0cb146bafa48

SHA256
5ab6a1726f425c6d0158f55eb8d81754ddedd51e651aa0a899a29b7a58619c4c

SHA512
53faffbda8a835bc1143e894c118c15901a5fd09cfc2224dd2f754c06dc794897315049a579b9a8382d4564f071576045aaaf824019b7139d939152dca38ce29

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

Filesize
944B

MD5
6d42b6da621e8df5674e26b799c8e2aa

SHA1
ab3ce1327ea1eeedb987ec823d5e0cb146bafa48

SHA256
5ab6a1726f425c6d0158f55eb8d81754ddedd51e651aa0a899a29b7a58619c4c

SHA512
53faffbda8a835bc1143e894c118c15901a5fd09cfc2224dd2f754c06dc794897315049a579b9a8382d4564f071576045aaaf824019b7139d939152dca38ce29

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

Filesize
944B

MD5
6d42b6da621e8df5674e26b799c8e2aa

SHA1
ab3ce1327ea1eeedb987ec823d5e0cb146bafa48

SHA256
5ab6a1726f425c6d0158f55eb8d81754ddedd51e651aa0a899a29b7a58619c4c

SHA512
53faffbda8a835bc1143e894c118c15901a5fd09cfc2224dd2f754c06dc794897315049a579b9a8382d4564f071576045aaaf824019b7139d939152dca38ce29

Download Submit
C:\Users\Admin\AppData\Local\Temp\D96KjH3TUw.bat

Filesize
200B

MD5
b1f7621ddfd3c003387ae7d3a2d8f30f

SHA1
5ff2ecd33c840857a840483633c10b354a528453

SHA256
aa73f1f37288395656524a4f448a710242ee875b6bb9fde8fac45330161ea171

SHA512
7923590956a1f86c46801531fb290bc7dfd5c48ca1830615cf1335852c75e5819f5f3b3c487987f8a3261003663d4f1ff431a28b5f80e16596bc29bcdb9a2a00

Download Submit
C:\Users\Default User\SearchApp.exe

Filesize
1.0MB

MD5
bd31e94b4143c4ce49c17d3af46bcad0

SHA1
f8c51ff3ff909531d9469d4ba1bbabae101853ff

SHA256
b5199d3eb28e7de8ec4a5de66cb339a03d90b297e2292473badaab98ade15c63

SHA512
f96658bd19b672fd84038bd7e95c89e14f4e6f84e3ce9c6fe3216861a41203406148c6a809c2ab350d0d6c5919c845f619deb1fc9b1f1814dfce87e566bc2394

Download Submit
C:\Users\Default\SearchApp.exe

Filesize
1.0MB

MD5
bd31e94b4143c4ce49c17d3af46bcad0

SHA1
f8c51ff3ff909531d9469d4ba1bbabae101853ff

SHA256
b5199d3eb28e7de8ec4a5de66cb339a03d90b297e2292473badaab98ade15c63

SHA512
f96658bd19b672fd84038bd7e95c89e14f4e6f84e3ce9c6fe3216861a41203406148c6a809c2ab350d0d6c5919c845f619deb1fc9b1f1814dfce87e566bc2394

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/1356-164-0x00007FFB6C8E0000-0x00007FFB6D3A1000-memory.dmp

Filesize
10.8MB

Download
memory/1356-166-0x00007FFB6C8E0000-0x00007FFB6D3A1000-memory.dmp

Filesize
10.8MB

Download
memory/2580-165-0x00007FFB6C8E0000-0x00007FFB6D3A1000-memory.dmp

Filesize
10.8MB

Download
memory/2580-158-0x00007FFB6C8E0000-0x00007FFB6D3A1000-memory.dmp

Filesize
10.8MB

Download
memory/3380-146-0x000001C1F5C00000-0x000001C1F5C22000-memory.dmp

Filesize
136KB

Download
memory/3380-152-0x00007FFB6C8E0000-0x00007FFB6D3A1000-memory.dmp

Filesize
10.8MB

Download
memory/3380-157-0x00007FFB6C8E0000-0x00007FFB6D3A1000-memory.dmp

Filesize
10.8MB

Download
memory/3592-141-0x00007FFB6C8E0000-0x00007FFB6D3A1000-memory.dmp

Filesize
10.8MB

Download
memory/3592-148-0x00007FFB6C8E0000-0x00007FFB6D3A1000-memory.dmp

Filesize
10.8MB

Download
memory/3592-140-0x00000000008B0000-0x00000000009C0000-memory.dmp

Filesize
1.1MB

Download
memory/3696-160-0x00007FFB6C8E0000-0x00007FFB6D3A1000-memory.dmp

Filesize
10.8MB

Download
memory/5060-159-0x00007FFB6C8E0000-0x00007FFB6D3A1000-memory.dmp

Filesize
10.8MB

Download
memory/5060-151-0x00007FFB6C8E0000-0x00007FFB6D3A1000-memory.dmp

Filesize
10.8MB

Download