02c93346144a41330282f2221eec48f37eb21a08022986a40aa0a06be33022f2

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
22-05-2024 02:43

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General

Target

2024-05-22_a07fb3a814698d1d2aac2e85f216f6d6_cryptolocker.exe
Size

55KB
MD5

a07fb3a814698d1d2aac2e85f216f6d6
SHA1

0a3fb8f3cf80889df45a3776adb45c971892b427
SHA256

02c93346144a41330282f2221eec48f37eb21a08022986a40aa0a06be33022f2
SHA512

271b75953a6ce2e41c5a4ae8caecb813e6270b00e744fc593e560ff6757fd1fa7f1a756f3ff57d69aed5599fe9e09196cf0943800b4c6ae23da99bb4252fdfea
SSDEEP

768:bP9g/WItCSsAfFaeOcfXVr3BPOz5CFBmNuFgUjlu:bP9g/xtCS3Dxx0h

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1324-0-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\gewos.exe	CryptoLocker_rule2
behavioral2/memory/3980-19-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 3 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1324-0-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\gewos.exe	UPX
behavioral2/memory/3980-19-0x0000000000400000-0x000000000040E000-memory.dmp	UPX

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

2024-05-22_a07fb3a814698d1d2aac2e85f216f6d6_cryptolocker.exegewos.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation	2024-05-22_a07fb3a814698d1d2aac2e85f216f6d6_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

Processes:

gewos.exe

pid process

3980 gewos.exe

pid	process
3980	gewos.exe

UPX packed file 3 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
behavioral2/memory/1324-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\gewos.exe	upx
behavioral2/memory/3980-19-0x0000000000400000-0x000000000040E000-memory.dmp	upx

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-22_a07fb3a814698d1d2aac2e85f216f6d6_cryptolocker.exe

description	pid	process	target process
PID 1324 wrote to memory of 3980	1324	2024-05-22_a07fb3a814698d1d2aac2e85f216f6d6_cryptolocker.exe	gewos.exe
PID 1324 wrote to memory of 3980	1324	2024-05-22_a07fb3a814698d1d2aac2e85f216f6d6_cryptolocker.exe	gewos.exe
PID 1324 wrote to memory of 3980	1324	2024-05-22_a07fb3a814698d1d2aac2e85f216f6d6_cryptolocker.exe	gewos.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_a07fb3a814698d1d2aac2e85f216f6d6_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_a07fb3a814698d1d2aac2e85f216f6d6_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1324

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:3980

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\gewos.exe
Filesize
56KB

MD5
ac21bd4accac87a9352295bef88aa1b3

SHA1
004b412f905c9fcd723ed788234cec72dec520dd

SHA256
ab75aa8bc320d613a0df123cce20a89826b90fc602a3f75e023f77248da0a9d9

SHA512
89e5259ab4ed51d9c3b144bca28ea13ca44ae9d12149623bb6a886c4c4535d90d9cc3abe366d92b91e3040c3854ab95f1d82f88b5d0f9daf1445a258d7d6c800

Download Submit
C:\Users\Admin\AppData\Local\Temp\gewosik.exe
Filesize
185B

MD5
e2aeaee03a5f16d007ee5ab110b86bab

SHA1
aa95282a2000a012140a91dc950820d0fcd51e94

SHA256
1bf12dba35bf3ef61c41f2eec3d758648b20fa5011d9913c2430bbfa431cb898

SHA512
a53a68c2f4ef4335984f3830dbce9096f0cf358c02f265d9dae160a865242d5e99a8e8b9322425530ad10f2fe87bf3464ddfcf617a0dc63e3c641e197ebaa6e0

Download Submit
memory/1324-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/1324-1-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/1324-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1324-9-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/3980-19-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/3980-27-0x0000000002D60000-0x0000000002D66000-memory.dmp

Filesize
24KB

Download