General
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Target
DHL_INVOICE.exe
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Size
486KB
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Sample
201109-23yfahby2e
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MD5
6bf0c02f8f9746e45d6584f0f52c3eeb
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SHA1
e568f73b84fb6660f62e769b6240a48a5c2a0b79
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SHA256
5d71a063c0b7bdc86b16aaaf0048953f12472ad1383082432274273b485040e1
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SHA512
123c294c2a6d61629beffda3cd017a2be73481786731cbc6b6ad0dc5000dc39b933fcb3d190e275923e3e214533c4b1967018fdff8352d44595d6104857375c5
Malware Config
Extracted
agenttesla
Protocol: smtp- Host:
mail.cosmosgroup.in - Port:
587 - Username:
santosh@cosmosgroup.in - Password:
santosh_cosmos
Targets
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Target
DHL_INVOICE.exe
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Size
486KB
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MD5
6bf0c02f8f9746e45d6584f0f52c3eeb
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SHA1
e568f73b84fb6660f62e769b6240a48a5c2a0b79
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SHA256
5d71a063c0b7bdc86b16aaaf0048953f12472ad1383082432274273b485040e1
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SHA512
123c294c2a6d61629beffda3cd017a2be73481786731cbc6b6ad0dc5000dc39b933fcb3d190e275923e3e214533c4b1967018fdff8352d44595d6104857375c5
Score10/10-
AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
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CoreEntity .NET Packer
A .NET packer called CoreEntity where it has embedded the payload as a BitMap object which is later decrypted.
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AgentTesla Payload
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Looks for VirtualBox Guest Additions in registry
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rezer0
Detects ReZer0, a packer with multiple versions used in various campaigns.
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Looks for VMWare Tools registry key
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Checks BIOS information in registry
BIOS information is often read in order to detect sandboxing environments.
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Reads data files stored by FTP clients
Tries to access configuration files associated with programs like FileZilla.
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Reads user/profile data of local email clients
Email clients store some user data on disk where infostealers will often target it.
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Reads user/profile data of web browsers
Infostealers often target stored browser data, which can include saved credentials etc.
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Maps connected drives based on registry
Disk information is often read in order to detect sandboxing environments.
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Suspicious use of SetThreadContext
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