Analysis
-
max time kernel
90s -
max time network
123s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
02/06/2024, 05:22
Behavioral task
behavioral1
Sample
2024-06-02_3d024fb7baaa334c2960f3fbeedd05fb_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-06-02_3d024fb7baaa334c2960f3fbeedd05fb_cryptolocker.exe
Resource
win10v2004-20240426-en
General
-
Target
2024-06-02_3d024fb7baaa334c2960f3fbeedd05fb_cryptolocker.exe
-
Size
57KB
-
MD5
3d024fb7baaa334c2960f3fbeedd05fb
-
SHA1
2bd256a8081615f46de79e90a1f31cf5518bd19d
-
SHA256
5ec61f5a1d05c4c65b3416e73daa69b8453d62140cdadf5f3b967fd66cdb6ceb
-
SHA512
200322915004cd627c2e5264fd8e6eebfa3cc83a70fa86c6baf92077ea1c072770d202ad7e5b383b9d6cf75a97d52be9c4ba79c35293660b3374f4f09c57d90a
-
SSDEEP
768:bP9g/WItCSsAfFaeOcfXVr3BPOz5CFBmNuFgUjlgzl:bP9g/xtCS3Dxx0nl
Malware Config
Signatures
-
Detection of CryptoLocker Variants 3 IoCs
resource yara_rule behavioral2/memory/1140-0-0x0000000000400000-0x000000000040E000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x0007000000023305-13.dat CryptoLocker_rule2 behavioral2/memory/2584-19-0x0000000000400000-0x000000000040E000-memory.dmp CryptoLocker_rule2 -
UPX dump on OEP (original entry point) 3 IoCs
resource yara_rule behavioral2/memory/1140-0-0x0000000000400000-0x000000000040E000-memory.dmp UPX behavioral2/files/0x0007000000023305-13.dat UPX behavioral2/memory/2584-19-0x0000000000400000-0x000000000040E000-memory.dmp UPX -
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-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation 2024-06-02_3d024fb7baaa334c2960f3fbeedd05fb_cryptolocker.exe Key value queried \REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation gewos.exe -
Executes dropped EXE 1 IoCs
pid Process 2584 gewos.exe -
resource yara_rule behavioral2/memory/1140-0-0x0000000000400000-0x000000000040E000-memory.dmp upx behavioral2/files/0x0007000000023305-13.dat upx behavioral2/memory/2584-19-0x0000000000400000-0x000000000040E000-memory.dmp upx -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
-
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 1140 wrote to memory of 2584 1140 2024-06-02_3d024fb7baaa334c2960f3fbeedd05fb_cryptolocker.exe 82 PID 1140 wrote to memory of 2584 1140 2024-06-02_3d024fb7baaa334c2960f3fbeedd05fb_cryptolocker.exe 82 PID 1140 wrote to memory of 2584 1140 2024-06-02_3d024fb7baaa334c2960f3fbeedd05fb_cryptolocker.exe 82
Processes
-
C:\Users\Admin\AppData\Local\Temp\2024-06-02_3d024fb7baaa334c2960f3fbeedd05fb_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-02_3d024fb7baaa334c2960f3fbeedd05fb_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1140 -
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:2584
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
-
Filesize
57KB
MD5c2f7c450456777d0bbd7c871567731db
SHA17e003d132fdacd1cbe4cc4daa0eb534f78523a45
SHA2565c10a9ac7d93af10f0979da619232bb83d4f0f01eb059fbcdd8f6bff8bcc86ee
SHA51233e9f599be7a6743265995c2d0ace6223ae0a508037d1181a8394506292275aa38b9cced192e67dfa795cbc1aea1908a4af04ed4db669a577a24bc354b6126ec
-
Filesize
185B
MD54f0ca1b622d722145d4362acd91c5ce5
SHA1ddab15c0781a9c08bae9e6366d47f1be91708851
SHA2562bd91df1429af0bf0a2a68156d3be3379a20313d8537b7ba495c1c2812e34a5d
SHA51277915e078ddf6caadd2b367fdccbbe0cc5435b106636f49bca58ab2e8514350ef21b4c8741da520d4b41e1233ee0cec3b96c025a588201cba622831a7387021c