9bbc4dbd375d6a7a19dc51c90cee88f0c4ff456c0c373d6b391749cdb811cd36

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
22-05-2024 02:30

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General

Target

2024-05-22_4190a8badb15f3ec0bc2f17cdeca669f_cryptolocker.exe
Size

69KB
MD5

4190a8badb15f3ec0bc2f17cdeca669f
SHA1

3ce3d9e9005b6762e4df199f444604eefc3a9238
SHA256

9bbc4dbd375d6a7a19dc51c90cee88f0c4ff456c0c373d6b391749cdb811cd36
SHA512

9dc01a9a23cd81c69a97048c30a4b40d6bb5e086dbdf41746afd3377127be66cafa17a025f150b3d49e1518644a94c84e97d29fe447e282bc40ea4b2101ebebc
SSDEEP

768:quVbxjgQNQXtckstOOtEvwDpjAaDOK6PsED3VK2+ZtyOjgO4r9vFAg2rq6W1A1PY:quJu9cvMOtEvwDpjWYTjipvF2bx1PQAY

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/672-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/672-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3236-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/672-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/672-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3236-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/672-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/672-18-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/3236-27-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Checks computer location settings 2 TTPs 1 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

2024-05-22_4190a8badb15f3ec0bc2f17cdeca669f_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation	2024-05-22_4190a8badb15f3ec0bc2f17cdeca669f_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

3236 asih.exe

pid	process
3236	asih.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/672-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/672-18-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/3236-27-0x0000000000500000-0x000000000050F000-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_4190a8badb15f3ec0bc2f17cdeca669f_cryptolocker.exe

description	pid	process	target process
PID 672 wrote to memory of 3236	672	2024-05-22_4190a8badb15f3ec0bc2f17cdeca669f_cryptolocker.exe	asih.exe
PID 672 wrote to memory of 3236	672	2024-05-22_4190a8badb15f3ec0bc2f17cdeca669f_cryptolocker.exe	asih.exe
PID 672 wrote to memory of 3236	672	2024-05-22_4190a8badb15f3ec0bc2f17cdeca669f_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_4190a8badb15f3ec0bc2f17cdeca669f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_4190a8badb15f3ec0bc2f17cdeca669f_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:672

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:3236

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=3824,i,13281073920029625837,8253721632651544158,262144 --variations-seed-version --mojo-platform-channel-handle=4168 /prefetch:8
1⤵
PID:1808

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\asih.exe
Filesize
69KB

MD5
e6c25ebe85122181cf96a25262543838

SHA1
8318d0df416f90a55ca9fa851044b996a72178c6

SHA256
3b49ab7826d3ca8d15fe6c399fdc3954636d4c1c7f9ea879b7034fee264e6cc9

SHA512
8335ba9dab44468a5f95b36565a0f542a0bcd26b507a77d39b3ba48c408c4d6cb7e56504a19c6684832b3f32e49445490d31734e0a1848e0f6af0ef546cdf43e

Download Submit
memory/672-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/672-1-0x00000000007B0000-0x00000000007B6000-memory.dmp

Filesize
24KB

Download
memory/672-2-0x00000000007D0000-0x00000000007D6000-memory.dmp

Filesize
24KB

Download
memory/672-9-0x00000000007B0000-0x00000000007B6000-memory.dmp

Filesize
24KB

Download
memory/672-18-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3236-20-0x0000000002100000-0x0000000002106000-memory.dmp

Filesize
24KB

Download
memory/3236-26-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3236-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download