bfa0da975c55775e8adee95db2015abd77a7dc5cfec47863f08b790f134adcb8

Analysis

max time kernel
147s
max time network
159s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
11/04/2024, 02:47

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General

Target

2024-04-11_d1340a8696496d8a65e472389dd05a44_cryptolocker.exe
Size

102KB
MD5

d1340a8696496d8a65e472389dd05a44
SHA1

a5c2f2dda58d3009551b92069d422005c7847bbe
SHA256

bfa0da975c55775e8adee95db2015abd77a7dc5cfec47863f08b790f134adcb8
SHA512

72f5883b4344c5b66e6168560e7d85dca26be2014d4bc56fef2aaa72c62dfdd4ded97902b785287660f6a64b1ec260619c96c1c6dac69bce5060b35252f19be2
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgpwqWsviPeBk:AnBdOOtEvwDpj6zT

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1972-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1972-11-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000800000002326a-14.dat	CryptoLocker_rule2
behavioral2/memory/3496-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1972-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1972-11-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000800000002326a-14.dat	CryptoLocker_set1
behavioral2/memory/3496-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1972-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/1972-11-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x000800000002326a-14.dat	UPX
behavioral2/memory/3496-27-0x0000000000500000-0x000000000050F000-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-04-11_d1340a8696496d8a65e472389dd05a44_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3496	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1972-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/1972-11-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x000800000002326a-14.dat	upx
behavioral2/memory/3496-27-0x0000000000500000-0x000000000050F000-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

description	pid	Process	procid_target
PID 1972 wrote to memory of 3496	1972	2024-04-11_d1340a8696496d8a65e472389dd05a44_cryptolocker.exe	91
PID 1972 wrote to memory of 3496	1972	2024-04-11_d1340a8696496d8a65e472389dd05a44_cryptolocker.exe	91
PID 1972 wrote to memory of 3496	1972	2024-04-11_d1340a8696496d8a65e472389dd05a44_cryptolocker.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-04-11_d1340a8696496d8a65e472389dd05a44_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-11_d1340a8696496d8a65e472389dd05a44_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1972
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3496

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 --mojo-platform-channel-handle=4340 --field-trial-handle=2252,i,16022092570067181109,3235558581947505669,262144 --variations-seed-version /prefetch:8
1⤵
PID:4692

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

Replay Monitor

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Downloads

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

Filesize
102KB

MD5
2777708858f78a7c311d97ee0bd6e675

SHA1
c9d1f4f3a5bef175707a5d0e9c8b054e5e18d0f5

SHA256
ac96567f7bc4a6b93bb136713ec03835bcc77efd5b308b7fd5aa6de2138634be

SHA512
fe00f9c9c81c77243c04e515cceb12a1a930557ebbc1f60cb7d877cc581b7aa97885875f2288d028a6ee3a4a1ce48b8b21e98c8d4411ae2a4cb9d5ca8296a7ce

Download Submit
memory/1972-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1972-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/1972-2-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/1972-3-0x0000000000510000-0x0000000000516000-memory.dmp

Filesize
24KB

Download
memory/1972-11-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3496-19-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/3496-20-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/3496-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download