1ab5a0fe4fd91bffcc160a6976c06dc6db3ff423a1bd85b8482e7d8400cc9827

Analysis

max time kernel
146s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
02/06/2024, 04:23

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General

Target

2024-06-02_1b8ad3f5f6f5b5a25457a8faf43a856e_cryptolocker.exe
Size

64KB
MD5

1b8ad3f5f6f5b5a25457a8faf43a856e
SHA1

d5634a46787bad3cd951143ab6d8fa154c37da96
SHA256

1ab5a0fe4fd91bffcc160a6976c06dc6db3ff423a1bd85b8482e7d8400cc9827
SHA512

bd90da22fed54f99c339e9a9401e9e0dc7c9d9b7b8512639fd492379ece579b5e6c89129a002160048ba3dcc58d639a2ddd877cae0ce6c1e63e8faee704c5aa3
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61vSbgtsiEp:BbdDmjr+OtEvwDpjM85

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/948-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/948-10-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000900000002326d-14.dat	CryptoLocker_rule2
behavioral2/memory/4632-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/948-10-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4632-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/948-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/948-10-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000900000002326d-14.dat	UPX
behavioral2/memory/4632-27-0x0000000000500000-0x0000000000510000-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	2024-06-02_1b8ad3f5f6f5b5a25457a8faf43a856e_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4632	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 948 wrote to memory of 4632	948	2024-06-02_1b8ad3f5f6f5b5a25457a8faf43a856e_cryptolocker.exe	91
PID 948 wrote to memory of 4632	948	2024-06-02_1b8ad3f5f6f5b5a25457a8faf43a856e_cryptolocker.exe	91
PID 948 wrote to memory of 4632	948	2024-06-02_1b8ad3f5f6f5b5a25457a8faf43a856e_cryptolocker.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-06-02_1b8ad3f5f6f5b5a25457a8faf43a856e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-02_1b8ad3f5f6f5b5a25457a8faf43a856e_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:948
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4632

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=4156 --field-trial-handle=2180,i,12780723798465539942,12010519452607841069,262144 --variations-seed-version /prefetch:8
1⤵
PID:3504

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
64KB

MD5
3b9dd5a4dd3eb39455d47c1799ba32aa

SHA1
1b686cdfcbf31eb382887614cb81b309dfdc9f36

SHA256
7fab997c8e8e54edd22d512f56bd1186a84a8ea792ecd08a3573ebe608e0b63a

SHA512
cb29971195c8beb0cc491bb2ce210971148866e39724b0bac70dd08f685e35c7b1f3c6623617d91f4dac72b7f92a65cbb045f0c74cd5472d11c082616f0fcada

Download Submit
memory/948-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/948-1-0x00000000005F0000-0x00000000005F6000-memory.dmp

Filesize
24KB

Download
memory/948-2-0x00000000005F0000-0x00000000005F6000-memory.dmp

Filesize
24KB

Download
memory/948-3-0x0000000000610000-0x0000000000616000-memory.dmp

Filesize
24KB

Download
memory/948-10-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4632-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4632-20-0x0000000002090000-0x0000000002096000-memory.dmp

Filesize
24KB

Download
memory/4632-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download