Analysis
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max time kernel
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max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
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submitted
16-01-2023 23:41
General
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Target
HEUR-Trojan-Spy.MSIL.Stealer.gen-21b581a0eee0.exe
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Size
1.3MB
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MD5
67332c4b46c0b9f29d331cafc6aa3564
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SHA1
5c409710f34b49a25ceb4773b879ebcc0c4ad610
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SHA256
21b581a0eee089081f0ee4b52641b33565240499a2eaf2fd7bd0123ee584e98d
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SHA512
9125cc8fed810522e2929c34a8d6dfbbfab2a03d5ee761fb4d86768ac9259e41bc3b57892375301afc3bacd00dd92d13d26f60147455c9d5e224feb812ff3ba7
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SSDEEP
24576:MzaHCAvwbSr2sTzNratLY5gaTfcb+MeZvD6PdG942L+EUL++4:MzEZwbSrf3mFpAKGP+J
Malware Config
Signatures
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DcRat
DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.
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DCRat payload 3 IoCs
Detects payload of DCRat, commonly dropped by NSIS installers.
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Executes dropped EXE 1 IoCs
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Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
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Drops file in System32 directory 4 IoCs
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Drops file in Program Files directory 3 IoCs
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Drops file in Windows directory 2 IoCs
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Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Creates scheduled task(s) 1 TTPs 5 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
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Suspicious behavior: EnumeratesProcesses 2 IoCs
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Suspicious use of AdjustPrivilegeToken 2 IoCs
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Suspicious use of WriteProcessMemory 12 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\HEUR-Trojan-Spy.MSIL.Stealer.gen-21b581a0eee0.exe"C:\Users\Admin\AppData\Local\Temp\HEUR-Trojan-Spy.MSIL.Stealer.gen-21b581a0eee0.exe"1⤵
- Checks computer location settings
- Drops file in System32 directory
- Drops file in Program Files directory
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "services" /sc ONLOGON /tr "'C:\Program Files\Uninstall Information\services.exe'" /rl HIGHEST /f2⤵
- Creates scheduled task(s)
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C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Windows\System32\msvcr100_clr0400\RuntimeBroker.exe'" /rl HIGHEST /f2⤵
- Creates scheduled task(s)
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C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Windows\System32\DavSyncProvider\RuntimeBroker.exe'" /rl HIGHEST /f2⤵
- Creates scheduled task(s)
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C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "upfc" /sc ONLOGON /tr "'C:\odt\upfc.exe'" /rl HIGHEST /f2⤵
- Creates scheduled task(s)
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C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "SearchApp" /sc ONLOGON /tr "'C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApi.CppWinrt\SearchApp.exe'" /rl HIGHEST /f2⤵
- Creates scheduled task(s)
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C:\Windows\System32\msvcr100_clr0400\RuntimeBroker.exe"C:\Windows\System32\msvcr100_clr0400\RuntimeBroker.exe"2⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
1.3MB
MD567332c4b46c0b9f29d331cafc6aa3564
SHA15c409710f34b49a25ceb4773b879ebcc0c4ad610
SHA25621b581a0eee089081f0ee4b52641b33565240499a2eaf2fd7bd0123ee584e98d
SHA5129125cc8fed810522e2929c34a8d6dfbbfab2a03d5ee761fb4d86768ac9259e41bc3b57892375301afc3bacd00dd92d13d26f60147455c9d5e224feb812ff3ba7
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Filesize
1.3MB
MD567332c4b46c0b9f29d331cafc6aa3564
SHA15c409710f34b49a25ceb4773b879ebcc0c4ad610
SHA25621b581a0eee089081f0ee4b52641b33565240499a2eaf2fd7bd0123ee584e98d
SHA5129125cc8fed810522e2929c34a8d6dfbbfab2a03d5ee761fb4d86768ac9259e41bc3b57892375301afc3bacd00dd92d13d26f60147455c9d5e224feb812ff3ba7
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Filesize
10.8MB
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Filesize
10.8MB
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Filesize
1.3MB
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Filesize
10.8MB
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Filesize
10.8MB
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Filesize
10.8MB