General
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Target
fd42e618223f510d694c5fb2f8ecbc1a88cabf003bcf20da6227da30a1352a0f.exe
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Size
579KB
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Sample
240531-l4p4daeb91
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MD5
a991da123f34074f2ee8ea0d798990f9
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SHA1
3988195503348626e8f9185747a216c8e7839130
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SHA256
fd42e618223f510d694c5fb2f8ecbc1a88cabf003bcf20da6227da30a1352a0f
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SHA512
1f958cacb820833ea8b5ac2d9ca7f596625e688f8f6b6e3ab6f27aa3b25b8c9e5b57e1eed532a8d2519da6c1b41492eb8ac930fc25eaf2be2f344c2f32e81a49
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SSDEEP
12288:ntSXI9aVcVXyB7qngm/krqaeAPu3YNEYId/yhlJQNXU:neI9aucNSk2H+yCId/iQC
Static task
static1
Behavioral task
behavioral1
Sample
fd42e618223f510d694c5fb2f8ecbc1a88cabf003bcf20da6227da30a1352a0f.exe
Resource
win7-20240419-en
Behavioral task
behavioral2
Sample
fd42e618223f510d694c5fb2f8ecbc1a88cabf003bcf20da6227da30a1352a0f.exe
Resource
win10v2004-20240426-en
Malware Config
Extracted
asyncrat
AsyncRAT
Fresh
pepecasas123.net:4608
AsyncMutex_5952
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delay
3
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install
false
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install_folder
%AppData%
Extracted
smokeloader
pub2
Targets
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Target
fd42e618223f510d694c5fb2f8ecbc1a88cabf003bcf20da6227da30a1352a0f.exe
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Size
579KB
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MD5
a991da123f34074f2ee8ea0d798990f9
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SHA1
3988195503348626e8f9185747a216c8e7839130
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SHA256
fd42e618223f510d694c5fb2f8ecbc1a88cabf003bcf20da6227da30a1352a0f
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SHA512
1f958cacb820833ea8b5ac2d9ca7f596625e688f8f6b6e3ab6f27aa3b25b8c9e5b57e1eed532a8d2519da6c1b41492eb8ac930fc25eaf2be2f344c2f32e81a49
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SSDEEP
12288:ntSXI9aVcVXyB7qngm/krqaeAPu3YNEYId/yhlJQNXU:neI9aucNSk2H+yCId/iQC
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Modifies firewall policy service
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PrivateLoader
PrivateLoader is a downloader sold as a pay-per-install malware distribution service.
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Blocklisted process makes network request
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Downloads MZ/PE file
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Drops file in Drivers directory
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Modifies Installed Components in the registry
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Sets service image path in registry
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Checks BIOS information in registry
BIOS information is often read in order to detect sandboxing environments.
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Checks computer location settings
Looks up country code configured in the registry, likely geofence.
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Drops startup file
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Executes dropped EXE
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Loads dropped DLL
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Modifies system executable filetype association
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Registers COM server for autorun
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Unexpected DNS network traffic destination
Network traffic to other servers than the configured DNS servers was detected on the DNS port.
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Accesses cryptocurrency files/wallets, possible credential harvesting
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Adds Run key to start application
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Checks for any installed AV software in registry
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Checks installed software on the system
Looks up Uninstall key entries in the registry to enumerate software on the system.
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Drops Chrome extension
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Drops desktop.ini file(s)
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Enumerates connected drives
Attempts to read the root path of hard drives other than the default C: drive.
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Legitimate hosting services abused for malware hosting/C2
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Looks up external IP address via web service
Uses a legitimate IP lookup service to find the infected system's external IP.
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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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Writes to the Master Boot Record (MBR)
Bootkits write to the MBR to gain persistence at a level below the operating system.
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Drops file in System32 directory
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Suspicious use of SetThreadContext
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MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
4Registry Run Keys / Startup Folder
4Browser Extensions
1Create or Modify System Process
1Windows Service
1Event Triggered Execution
1Change Default File Association
1Pre-OS Boot
1Bootkit
1Scheduled Task/Job
1Privilege Escalation
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Boot or Logon Autostart Execution
4Registry Run Keys / Startup Folder
4Create or Modify System Process
1Windows Service
1Event Triggered Execution
1Change Default File Association
1Scheduled Task/Job
1Defense Evasion
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Impair Defenses
3Disable or Modify Tools
3Modify Registry
11Pre-OS Boot
1Bootkit
1Subvert Trust Controls
1Install Root Certificate
1