Analysis
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max time kernel
134s -
max time network
156s -
platform
windows10-2004_x64 -
resource
win10v2004-20220414-en -
submitted
21-05-2022 00:32
Static task
static1
Behavioral task
behavioral1
Sample
37d6832272f4b87fd9194539e17c5da57b8c4508d54e586b8c6bcf8b856f82be.exe
Resource
win7-20220414-en
General
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Target
37d6832272f4b87fd9194539e17c5da57b8c4508d54e586b8c6bcf8b856f82be.exe
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Size
28KB
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MD5
07c27d514bfbde4482b8e1b6ea27b456
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SHA1
535e1b3f81abcfcbae2066f28f3bcbded60e6829
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SHA256
37d6832272f4b87fd9194539e17c5da57b8c4508d54e586b8c6bcf8b856f82be
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SHA512
f69492a2c8a6eca0abfb57f4b7e0d9bd347f8c8b6e952ce1998b13bf0df898e47ad87dfb3d28f6a47ff8e7652fd4ed3305fce5103b4c3e9ec29fd8af599555d2
Malware Config
Extracted
limerat
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aes_key
yourmomisobesaporcodio
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antivm
true
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c2_url
https://pastebin.com/raw/Si5Hcuvu
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delay
3
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download_payload
false
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install
true
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install_name
RuntimeBroker.exe
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main_folder
UserProfile
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pin_spread
false
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sub_folder
\VM\
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usb_spread
true
Signatures
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Executes dropped EXE 1 IoCs
Processes:
RuntimeBroker.exepid process 4328 RuntimeBroker.exe -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
37d6832272f4b87fd9194539e17c5da57b8c4508d54e586b8c6bcf8b856f82be.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Control Panel\International\Geo\Nation 37d6832272f4b87fd9194539e17c5da57b8c4508d54e586b8c6bcf8b856f82be.exe -
Legitimate hosting services abused for malware hosting/C2 1 TTPs
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Maps connected drives based on registry 3 TTPs 4 IoCs
Disk information is often read in order to detect sandboxing environments.
Processes:
RuntimeBroker.exe37d6832272f4b87fd9194539e17c5da57b8c4508d54e586b8c6bcf8b856f82be.exedescription ioc process Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0 RuntimeBroker.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum 37d6832272f4b87fd9194539e17c5da57b8c4508d54e586b8c6bcf8b856f82be.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0 37d6832272f4b87fd9194539e17c5da57b8c4508d54e586b8c6bcf8b856f82be.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum RuntimeBroker.exe -
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 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
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Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
RuntimeBroker.exedescription pid process Token: SeDebugPrivilege 4328 RuntimeBroker.exe Token: SeDebugPrivilege 4328 RuntimeBroker.exe -
Suspicious use of WriteProcessMemory 6 IoCs
Processes:
37d6832272f4b87fd9194539e17c5da57b8c4508d54e586b8c6bcf8b856f82be.exedescription pid process target process PID 4912 wrote to memory of 1200 4912 37d6832272f4b87fd9194539e17c5da57b8c4508d54e586b8c6bcf8b856f82be.exe schtasks.exe PID 4912 wrote to memory of 1200 4912 37d6832272f4b87fd9194539e17c5da57b8c4508d54e586b8c6bcf8b856f82be.exe schtasks.exe PID 4912 wrote to memory of 1200 4912 37d6832272f4b87fd9194539e17c5da57b8c4508d54e586b8c6bcf8b856f82be.exe schtasks.exe PID 4912 wrote to memory of 4328 4912 37d6832272f4b87fd9194539e17c5da57b8c4508d54e586b8c6bcf8b856f82be.exe RuntimeBroker.exe PID 4912 wrote to memory of 4328 4912 37d6832272f4b87fd9194539e17c5da57b8c4508d54e586b8c6bcf8b856f82be.exe RuntimeBroker.exe PID 4912 wrote to memory of 4328 4912 37d6832272f4b87fd9194539e17c5da57b8c4508d54e586b8c6bcf8b856f82be.exe RuntimeBroker.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\37d6832272f4b87fd9194539e17c5da57b8c4508d54e586b8c6bcf8b856f82be.exe"C:\Users\Admin\AppData\Local\Temp\37d6832272f4b87fd9194539e17c5da57b8c4508d54e586b8c6bcf8b856f82be.exe"1⤵
- Checks computer location settings
- Maps connected drives based on registry
- Suspicious use of WriteProcessMemory
PID:4912 -
C:\Windows\SysWOW64\schtasks.exeschtasks /create /f /sc ONLOGON /RL HIGHEST /tn LimeRAT-Admin /tr "'C:\Users\Admin\VM\RuntimeBroker.exe'"2⤵
- Creates scheduled task(s)
PID:1200
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C:\Users\Admin\VM\RuntimeBroker.exe"C:\Users\Admin\VM\RuntimeBroker.exe"2⤵
- Executes dropped EXE
- Maps connected drives based on registry
- Suspicious use of AdjustPrivilegeToken
PID:4328
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
28KB
MD507c27d514bfbde4482b8e1b6ea27b456
SHA1535e1b3f81abcfcbae2066f28f3bcbded60e6829
SHA25637d6832272f4b87fd9194539e17c5da57b8c4508d54e586b8c6bcf8b856f82be
SHA512f69492a2c8a6eca0abfb57f4b7e0d9bd347f8c8b6e952ce1998b13bf0df898e47ad87dfb3d28f6a47ff8e7652fd4ed3305fce5103b4c3e9ec29fd8af599555d2
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Filesize
28KB
MD507c27d514bfbde4482b8e1b6ea27b456
SHA1535e1b3f81abcfcbae2066f28f3bcbded60e6829
SHA25637d6832272f4b87fd9194539e17c5da57b8c4508d54e586b8c6bcf8b856f82be
SHA512f69492a2c8a6eca0abfb57f4b7e0d9bd347f8c8b6e952ce1998b13bf0df898e47ad87dfb3d28f6a47ff8e7652fd4ed3305fce5103b4c3e9ec29fd8af599555d2