Analysis
-
max time kernel
129s -
max time network
145s -
platform
windows7_x64 -
resource
win7-20220414-en -
submitted
08-07-2022 20:08
Static task
static1
Behavioral task
behavioral1
Sample
05a68e1fdcf49840097ac9879ff8bf190f7a8a7d7dc33d95d849df9af46a6f85.exe
Resource
win7-20220414-en
General
-
Target
05a68e1fdcf49840097ac9879ff8bf190f7a8a7d7dc33d95d849df9af46a6f85.exe
-
Size
2.6MB
-
MD5
7a8a6b5e4e5c662860bbd3adb7e22622
-
SHA1
234fd518fc22dfd428586a4ba58f85f69be7705d
-
SHA256
05a68e1fdcf49840097ac9879ff8bf190f7a8a7d7dc33d95d849df9af46a6f85
-
SHA512
f8ec8a900a253beb54bd9328a9ada484678a2bd6a6b3a380222fa88c30a4653d4f899958a801ee270c4bc949d9d6aaa7ee46515c28f91013ba99869586c2d9c6
Malware Config
Extracted
asyncrat
0.5.6A
185.70.187.145:5555
pehagymxwo
-
delay
5
-
install
true
-
install_file
gremor.exe
-
install_folder
%AppData%
Signatures
-
Async RAT payload 3 IoCs
Processes:
resource yara_rule behavioral1/memory/1840-58-0x0000000000C80000-0x0000000000F20000-memory.dmp asyncrat behavioral1/memory/1840-59-0x00000000771D0000-0x0000000077350000-memory.dmp asyncrat behavioral1/memory/1840-60-0x00000000771D0000-0x0000000077350000-memory.dmp asyncrat -
Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
Processes:
05a68e1fdcf49840097ac9879ff8bf190f7a8a7d7dc33d95d849df9af46a6f85.exedescription ioc process Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ 05a68e1fdcf49840097ac9879ff8bf190f7a8a7d7dc33d95d849df9af46a6f85.exe -
Checks BIOS information in registry 2 TTPs 2 IoCs
BIOS information is often read in order to detect sandboxing environments.
Processes:
05a68e1fdcf49840097ac9879ff8bf190f7a8a7d7dc33d95d849df9af46a6f85.exedescription ioc process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion 05a68e1fdcf49840097ac9879ff8bf190f7a8a7d7dc33d95d849df9af46a6f85.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion 05a68e1fdcf49840097ac9879ff8bf190f7a8a7d7dc33d95d849df9af46a6f85.exe -
Processes:
resource yara_rule behavioral1/memory/1840-58-0x0000000000C80000-0x0000000000F20000-memory.dmp themida behavioral1/memory/1840-59-0x00000000771D0000-0x0000000077350000-memory.dmp themida -
Processes:
05a68e1fdcf49840097ac9879ff8bf190f7a8a7d7dc33d95d849df9af46a6f85.exedescription ioc process Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA 05a68e1fdcf49840097ac9879ff8bf190f7a8a7d7dc33d95d849df9af46a6f85.exe -
Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
Processes:
05a68e1fdcf49840097ac9879ff8bf190f7a8a7d7dc33d95d849df9af46a6f85.exepid process 1840 05a68e1fdcf49840097ac9879ff8bf190f7a8a7d7dc33d95d849df9af46a6f85.exe -
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 2 IoCs
Processes:
05a68e1fdcf49840097ac9879ff8bf190f7a8a7d7dc33d95d849df9af46a6f85.exepid process 1840 05a68e1fdcf49840097ac9879ff8bf190f7a8a7d7dc33d95d849df9af46a6f85.exe 1840 05a68e1fdcf49840097ac9879ff8bf190f7a8a7d7dc33d95d849df9af46a6f85.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
05a68e1fdcf49840097ac9879ff8bf190f7a8a7d7dc33d95d849df9af46a6f85.exedescription pid process Token: SeDebugPrivilege 1840 05a68e1fdcf49840097ac9879ff8bf190f7a8a7d7dc33d95d849df9af46a6f85.exe -
Suspicious use of WriteProcessMemory 4 IoCs
Processes:
05a68e1fdcf49840097ac9879ff8bf190f7a8a7d7dc33d95d849df9af46a6f85.exedescription pid process target process PID 1840 wrote to memory of 1176 1840 05a68e1fdcf49840097ac9879ff8bf190f7a8a7d7dc33d95d849df9af46a6f85.exe schtasks.exe PID 1840 wrote to memory of 1176 1840 05a68e1fdcf49840097ac9879ff8bf190f7a8a7d7dc33d95d849df9af46a6f85.exe schtasks.exe PID 1840 wrote to memory of 1176 1840 05a68e1fdcf49840097ac9879ff8bf190f7a8a7d7dc33d95d849df9af46a6f85.exe schtasks.exe PID 1840 wrote to memory of 1176 1840 05a68e1fdcf49840097ac9879ff8bf190f7a8a7d7dc33d95d849df9af46a6f85.exe schtasks.exe
Processes
-
C:\Users\Admin\AppData\Local\Temp\05a68e1fdcf49840097ac9879ff8bf190f7a8a7d7dc33d95d849df9af46a6f85.exe"C:\Users\Admin\AppData\Local\Temp\05a68e1fdcf49840097ac9879ff8bf190f7a8a7d7dc33d95d849df9af46a6f85.exe"1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /create /f /sc ONLOGON /RL HIGHEST /tn "'gremor"' /tr "'C:\Users\Admin\AppData\Roaming\gremor.exe"'2⤵
- Creates scheduled task(s)
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
Loading Replay Monitor...
Downloads
-
memory/1176-61-0x0000000000000000-mapping.dmp
-
memory/1840-54-0x00000000751C1000-0x00000000751C3000-memory.dmpFilesize
8KB
-
memory/1840-55-0x0000000000C80000-0x0000000000F20000-memory.dmpFilesize
2.6MB
-
memory/1840-58-0x0000000000C80000-0x0000000000F20000-memory.dmpFilesize
2.6MB
-
memory/1840-59-0x00000000771D0000-0x0000000077350000-memory.dmpFilesize
1.5MB
-
memory/1840-60-0x00000000771D0000-0x0000000077350000-memory.dmpFilesize
1.5MB