9c078ebbed5101df2b70d5b06e98a5749608bb433eb95f1d98dabbe745414691

Analysis

max time kernel
150s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
24-05-2024 04:22

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General

Target

2024-05-24_04ddfc65bceaacb93b77fda9cd150517_cryptolocker.exe
Size

41KB
MD5

04ddfc65bceaacb93b77fda9cd150517
SHA1

b3864b7de41b2d6d81ba4b34480a398c9e82f111
SHA256

9c078ebbed5101df2b70d5b06e98a5749608bb433eb95f1d98dabbe745414691
SHA512

8a7552224fde0dc8a97d6332dce26c5a9d6e2b16b91bf17ea37c63913f79e99b976176d26b9d7d146b479a94381603267f035c381295cc8ea88d8c38435c3b18
SSDEEP

384:ba74uGLLQRcsdeQ72ngEr4K7YmE8j6CQYnrz1ZhdaXFXSCVQTLfjDpXqxKH1x:ba74zYcgT/EkdCQgpwXFXSqQXfj0xKVx

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4540-0-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\hasfj.exe	CryptoLocker_rule2
behavioral2/memory/4540-17-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4140-18-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4140-27-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4540-0-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\hasfj.exe	UPX
behavioral2/memory/4540-17-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/memory/4140-18-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/memory/4140-27-0x0000000008000000-0x000000000800F000-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:

2024-05-24_04ddfc65bceaacb93b77fda9cd150517_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation	2024-05-24_04ddfc65bceaacb93b77fda9cd150517_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

hasfj.exe

pid process

4140 hasfj.exe

pid	process
4140	hasfj.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4540-0-0x0000000008000000-0x000000000800F000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\hasfj.exe	upx
behavioral2/memory/4540-17-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/memory/4140-18-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/memory/4140-27-0x0000000008000000-0x000000000800F000-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:

2024-05-24_04ddfc65bceaacb93b77fda9cd150517_cryptolocker.exe

description	pid	process	target process
PID 4540 wrote to memory of 4140	4540	2024-05-24_04ddfc65bceaacb93b77fda9cd150517_cryptolocker.exe	hasfj.exe
PID 4540 wrote to memory of 4140	4540	2024-05-24_04ddfc65bceaacb93b77fda9cd150517_cryptolocker.exe	hasfj.exe
PID 4540 wrote to memory of 4140	4540	2024-05-24_04ddfc65bceaacb93b77fda9cd150517_cryptolocker.exe	hasfj.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-24_04ddfc65bceaacb93b77fda9cd150517_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-24_04ddfc65bceaacb93b77fda9cd150517_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4540
- C:\Users\Admin\AppData\Local\Temp\hasfj.exe
  "C:\Users\Admin\AppData\Local\Temp\hasfj.exe"
  2⤵
  - Executes dropped EXE
  PID:4140

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=3976,i,1999448010053300448,1112699187621658374,262144 --variations-seed-version --mojo-platform-channel-handle=3804 /prefetch:8
1⤵
PID:536

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\hasfj.exe

Filesize
41KB

MD5
6342d03015bcba90028f472b76513286

SHA1
166658dd8dc192aa2f0ef880bd9882799ba039c6

SHA256
f2c23b893821479e8dbd7ca1a4484e2e25e3f0c2f241a048a2444fe86f9c0fca

SHA512
e56cdc5c91a9d079ae3888dd38c27465c92fd74a5ab595ce9d816435021e8abe5179d05b61e559d24e27fc204af8cf42e6497f1ffe608eb3fa8e48a5369fad01

Download Submit
memory/4140-18-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/4140-26-0x0000000000600000-0x0000000000606000-memory.dmp

Filesize
24KB

Download
memory/4140-20-0x0000000003150000-0x0000000003156000-memory.dmp

Filesize
24KB

Download
memory/4140-27-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/4540-0-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/4540-1-0x0000000002D60000-0x0000000002D66000-memory.dmp

Filesize
24KB

Download
memory/4540-3-0x0000000003010000-0x0000000003016000-memory.dmp

Filesize
24KB

Download
memory/4540-2-0x0000000002D60000-0x0000000002D66000-memory.dmp

Filesize
24KB

Download
memory/4540-17-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download