951a00c2749e79bf73b3ce235464e5ab8a38ae3c9541ff8296ff979e971a4a0e

Analysis

max time kernel
148s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
07-03-2024 04:23

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General

Target

2024-03-07_17571d3ab7e8922c9ca7bf389ff2606d_cryptolocker.exe
Size

26KB
MD5

17571d3ab7e8922c9ca7bf389ff2606d
SHA1

7d54f22550d3112bbb75d29d8bee88b2de91b6d0
SHA256

951a00c2749e79bf73b3ce235464e5ab8a38ae3c9541ff8296ff979e971a4a0e
SHA512

64e7a416f1b77626eed02bbb1bf523f0afe911bb4d8a3acb527a77338d7f7c9354c0c0bd6b898ffa6082a7e8bff509056fc776196728eb8b7931ecc30181c341
SSDEEP

384:qxOZzyjOnqGAs+8ULueO4NdE8tOOtEvwDpjqIGRYK1sGGYkxlmO:q0ZziOWwULueOSdE8tOOtEvwDpjeox

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3460-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000800000002326a-13.dat	CryptoLocker_rule2
behavioral2/memory/3460-24-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2764-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/3460-24-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2764-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3460-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000800000002326a-13.dat	UPX
behavioral2/memory/3460-24-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2764-25-0x0000000000500000-0x0000000000510000-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	2024-03-07_17571d3ab7e8922c9ca7bf389ff2606d_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2764	asih.exe

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 3460 wrote to memory of 2764	3460	2024-03-07_17571d3ab7e8922c9ca7bf389ff2606d_cryptolocker.exe	100
PID 3460 wrote to memory of 2764	3460	2024-03-07_17571d3ab7e8922c9ca7bf389ff2606d_cryptolocker.exe	100
PID 3460 wrote to memory of 2764	3460	2024-03-07_17571d3ab7e8922c9ca7bf389ff2606d_cryptolocker.exe	100

C:\Users\Admin\AppData\Local\Temp\2024-03-07_17571d3ab7e8922c9ca7bf389ff2606d_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-07_17571d3ab7e8922c9ca7bf389ff2606d_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3460
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2764

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=3688 --field-trial-handle=2252,i,16022092570067181109,3235558581947505669,262144 --variations-seed-version /prefetch:8
1⤵
PID:1360

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
26KB

MD5
89182a170a74d5c4b919b8f8602d2c15

SHA1
c92cecb77f188cd82e65f2823aafbcf560d827c4

SHA256
786923a1f8cffc8a41f295625e120a026941bb02b5d9e41c0b8d18fbb7c7a3e3

SHA512
40c0191c6d42716357a2aac40b76f69146886fbc7b3a64f65da0809b82edce9fda8e9529854aa4388a812ae9ffe059dd2179e3369714af6a5b3ad3b9b1eb9c39

Download Submit
memory/2764-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3460-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3460-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3460-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3460-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3460-24-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download