Analysis
- max time kernel
148s - max time network
147s - platform
windows10-2004_x64 - resource
win10v2004-20220414-en - submitted
02/05/2022, 13:16
General
- Target af011ef170eec14497356b28fa8a80e4.exe
- Size 28KB
- Sample220502-qhsdtsffbk
- SHA256 387cc2ebbd93f8207e1fbf6ab34434dfb1dc04811d0937174f6251aa6e1cdaa1
Malware Config
Extracted
-
limerat
-
bc1q2yn60mcqwx3gmwjfzdh2sx6g8ck8s8405q43zy
-
aes_key
nyancat
-
antivm
true
-
c2_url
https://pastebin.com/raw/kJDs9fgb
-
delay
3
-
download_payload
false
-
install
true
-
install_name
Wservices.exe
-
main_folder
AppData
-
pin_spread
false
-
sub_folder
\
-
usb_spread
true
Signatures
- LimeRAT
Simple yet powerful RAT for Windows machines written in .NET.
- Executes dropped EXE 1 IoCs
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Legitimate hosting services abused for malware hosting/C2 1 TTPs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious behavior: EnumeratesProcesses 12 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of WriteProcessMemory 6 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\af011ef170eec14497356b28fa8a80e4.exe"C:\Users\Admin\AppData\Local\Temp\af011ef170eec14497356b28fa8a80e4.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\schtasks.exeschtasks /create /f /sc ONLOGON /RL HIGHEST /tn LimeRAT-Admin /tr "'C:\Users\Admin\AppData\Roaming\Wservices.exe'"2⤵
- Creates scheduled task(s)
-
-
C:\Users\Admin\AppData\Roaming\Wservices.exe"C:\Users\Admin\AppData\Roaming\Wservices.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
Wservices.exe
Wservices.exe
memory/316-138-0x00000000068D0000-0x0000000006962000-memory.dmp
memory/4480-130-0x0000000000F20000-0x0000000000F2C000-memory.dmp
memory/4480-131-0x00000000058D0000-0x000000000596C000-memory.dmp
memory/4480-132-0x0000000005970000-0x00000000059D6000-memory.dmp
memory/4480-133-0x00000000066A0000-0x0000000006C44000-memory.dmp