05b68ef797b3e18a0c1f9193b2923be82fc7c1cf3efa6d462b973464b69b530c

General

Target

2024-03-16_0c79175d37435b9e0cf1ee97785521d1_cryptolocker.exe
Size

71KB
MD5

0c79175d37435b9e0cf1ee97785521d1
SHA1

f0c96e7dca11a0a1bf6178d2f23f021600ac402e
SHA256

05b68ef797b3e18a0c1f9193b2923be82fc7c1cf3efa6d462b973464b69b530c
SHA512

7f249c9323795d703aec102def3a3dd6e618d71f7b26dd90ac2767cbc8f69f05c1caadfce266ff1a306e910d2279b8f6e138cf6ada765c58978da768896fc92e
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj9aYaFAeBA:z6a+CdOOtEvwDpjQe

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/4864-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00020000000227ea-13.dat	CryptoLocker_rule2
behavioral2/memory/2960-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4864-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2960-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/4864-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00020000000227ea-13.dat	CryptoLocker_set1
behavioral2/memory/2960-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4864-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2960-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/4864-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x00020000000227ea-13.dat	UPX
behavioral2/memory/2960-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4864-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2960-27-0x0000000000500000-0x0000000000510000-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	2024-03-16_0c79175d37435b9e0cf1ee97785521d1_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2960	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4864-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x00020000000227ea-13.dat	upx
behavioral2/memory/2960-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4864-26-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2960-27-0x0000000000500000-0x0000000000510000-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 4864 wrote to memory of 2960	4864	2024-03-16_0c79175d37435b9e0cf1ee97785521d1_cryptolocker.exe	100
PID 4864 wrote to memory of 2960	4864	2024-03-16_0c79175d37435b9e0cf1ee97785521d1_cryptolocker.exe	100
PID 4864 wrote to memory of 2960	4864	2024-03-16_0c79175d37435b9e0cf1ee97785521d1_cryptolocker.exe	100

C:\Users\Admin\AppData\Local\Temp\2024-03-16_0c79175d37435b9e0cf1ee97785521d1_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-16_0c79175d37435b9e0cf1ee97785521d1_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4864
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2960

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=1328 --field-trial-handle=3060,i,1774866140584649235,8085848018931772189,262144 --variations-seed-version /prefetch:8
1⤵
PID:3388

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

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
71KB

MD5
99a6a32060bee8777a3efff812a5cb33

SHA1
af8df042a9e3e7e32e196c66a82e38a995c013e1

SHA256
70f4bcb47c173eb1193094f5355427c8fa26b9e241ecdb86ecc0e8110561127f

SHA512
55c7f9926057029613c402bfc324b086fb0196f4b12202acd1efd9ee6a6f11ad40dcd4fdf5a9c12d8338ea399a184080ada2bd7302b029aaf963c7b82ec65334

Download Submit
memory/2960-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2960-19-0x0000000000630000-0x0000000000636000-memory.dmp

Filesize
24KB

Download
memory/2960-20-0x0000000000650000-0x0000000000656000-memory.dmp

Filesize
24KB

Download
memory/2960-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4864-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4864-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4864-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4864-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4864-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download

Analysis

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