8a2876616c613fc35ce8f1e3f83947c7dfd1fc0d5ff6db9677fe4fd60646aa05

Analysis

max time kernel
141s
max time network
127s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
21-05-2024 20:55

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General

Target

2024-05-21_8532875c0a005085dccd2eeab2f923d6_cryptolocker.exe
Size

57KB
MD5

8532875c0a005085dccd2eeab2f923d6
SHA1

e36998994c5161e2d37dd88210c90cb29e87e03a
SHA256

8a2876616c613fc35ce8f1e3f83947c7dfd1fc0d5ff6db9677fe4fd60646aa05
SHA512

bf49a08ebebafa1f69a2a1977d4668c82ced0d947a1c518a033a2fb7de382d6441a49d012bf4cb28b0f411a6612c6a20c1aaac52bcb3af442a0175d2f8fc6b47
SSDEEP

768:bP9g/WItCSsAfFaeOcfXVr3BPOz5CFBmNuFgUjlbQ9mER:bP9g/xtCS3Dxx0AQUO

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2948-0-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\gewos.exe	CryptoLocker_rule2
behavioral2/memory/2348-18-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 3 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2948-0-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\gewos.exe	UPX
behavioral2/memory/2348-18-0x0000000000400000-0x000000000040E000-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:

2024-05-21_8532875c0a005085dccd2eeab2f923d6_cryptolocker.exegewos.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation	2024-05-21_8532875c0a005085dccd2eeab2f923d6_cryptolocker.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation	gewos.exe

Executes dropped EXE 1 IoCs

Processes:

gewos.exe

pid process

2348 gewos.exe

pid	process
2348	gewos.exe

UPX packed file 3 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/2948-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\gewos.exe	upx
behavioral2/memory/2348-18-0x0000000000400000-0x000000000040E000-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:

2024-05-21_8532875c0a005085dccd2eeab2f923d6_cryptolocker.exe

description	pid	process	target process
PID 2948 wrote to memory of 2348	2948	2024-05-21_8532875c0a005085dccd2eeab2f923d6_cryptolocker.exe	gewos.exe
PID 2948 wrote to memory of 2348	2948	2024-05-21_8532875c0a005085dccd2eeab2f923d6_cryptolocker.exe	gewos.exe
PID 2948 wrote to memory of 2348	2948	2024-05-21_8532875c0a005085dccd2eeab2f923d6_cryptolocker.exe	gewos.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-21_8532875c0a005085dccd2eeab2f923d6_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_8532875c0a005085dccd2eeab2f923d6_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2948

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:2348

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=4436,i,7012731823941922179,12386606396608877869,262144 --variations-seed-version --mojo-platform-channel-handle=4376 /prefetch:8
1⤵
PID:3620

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\gewos.exe

Filesize
57KB

MD5
23656322d7227d9b038c7d7d3d8920f7

SHA1
3c106f84723c4727f43b5ab43f74cc1bf84a401c

SHA256
ee0d67d39b1834df3c012ff3a9dff7ed5a2c18d8b075aba79b6d5dd78aee33d1

SHA512
e8decb93e1918ef2e5eadcedff9aa44c2ce638ce0d56ff3b9a68499d0e44990e88d8bf727fad52704731eb42176c58d8e40f172f7426267e71124d5ddad86174

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

Filesize
185B

MD5
19318417cd0a019b490be949a1491269

SHA1
62325a2c59c9a9a1be2746f7becdd2b1c9dd8a8d

SHA256
67e478b75fa0140c1a7237e73a6e01682280d568f85e0eb7b15b244f5b99b015

SHA512
d1d961ef598140553badee68caba0b5eae1aaca3d89c175d9460673169eaf736ff6c0dbc73cc5b969f0285008830eb2d43a981260dc3c2d7064c7c9aa66de10c

Download Submit
memory/2348-18-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2348-27-0x0000000002210000-0x0000000002216000-memory.dmp

Filesize
24KB

Download
memory/2948-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2948-1-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/2948-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2948-9-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download