Analysis
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max time kernel
140s -
max time network
123s -
platform
windows10-2004_x64 -
resource
win10v2004-20240419-en -
resource tags
arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system -
submitted
03-05-2024 03:40
Static task
static1
Behavioral task
behavioral1
Sample
2024-05-03_678c65dd653483f5f857b0aa27462afb_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-05-03_678c65dd653483f5f857b0aa27462afb_cryptolocker.exe
Resource
win10v2004-20240419-en
General
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Target
2024-05-03_678c65dd653483f5f857b0aa27462afb_cryptolocker.exe
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Size
63KB
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MD5
678c65dd653483f5f857b0aa27462afb
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SHA1
d2139819455b4a71d2464b015a57b38219108255
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SHA256
4b5929339e5d0f1613983fbe60d23ad3ed40ff6171b805239cd588d75a43ea66
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SHA512
806a0b1f6287aaead26bc597dfd22ba944e00415202675fa43c95bce48a71d567ba8080870587fdadc508dda716ad7297ec377744a1a7b19341aa6f5dc83ddfa
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SSDEEP
1536:btB9g/xtCSKfxLIc//Xr+/AO/kIZ3ft2nVuTKB6nggOlHdUHaq:btng54SMLr+/AO/kIhfoKMHdw
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral2/files/0x000c000000023b35-12.dat CryptoLocker_rule2 -
Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-877519540-908060166-1852957295-1000\Control Panel\International\Geo\Nation 2024-05-03_678c65dd653483f5f857b0aa27462afb_cryptolocker.exe Key value queried \REGISTRY\USER\S-1-5-21-877519540-908060166-1852957295-1000\Control Panel\International\Geo\Nation gewos.exe -
Executes dropped EXE 1 IoCs
pid Process 2156 gewos.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 4948 wrote to memory of 2156 4948 2024-05-03_678c65dd653483f5f857b0aa27462afb_cryptolocker.exe 84 PID 4948 wrote to memory of 2156 4948 2024-05-03_678c65dd653483f5f857b0aa27462afb_cryptolocker.exe 84 PID 4948 wrote to memory of 2156 4948 2024-05-03_678c65dd653483f5f857b0aa27462afb_cryptolocker.exe 84
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-03_678c65dd653483f5f857b0aa27462afb_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-03_678c65dd653483f5f857b0aa27462afb_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4948 -
C:\Users\Admin\AppData\Local\Temp\gewos.exe"C:\Users\Admin\AppData\Local\Temp\gewos.exe"2⤵
- Checks computer location settings
- Executes dropped EXE
PID:2156
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
63KB
MD5a47c0be8d4f401eb9832a872daed1e56
SHA1fbbbb2548e68abe2a4435fd545db16f227a1f5a0
SHA256da119bc3d7944e2e703964129d41694f045ba916b9edbb6e7e43188147fc771c
SHA5123eb3adb2d63743bd915440c49d58c03cb2ed9d34ae8da966092eff6854c28dd47ceaf173672fe1958d71fe9185f9af8ec7add3b691f2297f437781b09728633d