5afa72dc8d0d93265083ce2950ddea42b7c808478be5aa1ef19dae5b75b18c23

Analysis

max time kernel
143s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
21-05-2024 15:47

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General

Target

2024-05-21_8ecb9d762611bb0e46b8abda615f8a05_cryptolocker.exe
Size

49KB
MD5

8ecb9d762611bb0e46b8abda615f8a05
SHA1

9150bbc696f841de35f3b575063a22ae65d24f85
SHA256

5afa72dc8d0d93265083ce2950ddea42b7c808478be5aa1ef19dae5b75b18c23
SHA512

65300bad4bbe534f779aad528ca7cd0dc81bc2e0e229186125a96b1d880fc2b5a1aaad05a37f5b81c7f26a389afad69716504292f1e9b3f939c364e8a3acf83e
SSDEEP

768:X6LsoEEeegiZPvEhHSG+gp/BtOOtEvwDpjBVaD3E09vdXfe:X6QFElP6n+gJBMOtEvwDpjBtEdXfe

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2

Detection of Cryptolocker Samples 1 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1

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:

2024-05-21_8ecb9d762611bb0e46b8abda615f8a05_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-05-21_8ecb9d762611bb0e46b8abda615f8a05_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2760 asih.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
2760	asih.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-21_8ecb9d762611bb0e46b8abda615f8a05_cryptolocker.exe

description	pid	process	target process
PID 4664 wrote to memory of 2760	4664	2024-05-21_8ecb9d762611bb0e46b8abda615f8a05_cryptolocker.exe	asih.exe
PID 4664 wrote to memory of 2760	4664	2024-05-21_8ecb9d762611bb0e46b8abda615f8a05_cryptolocker.exe	asih.exe
PID 4664 wrote to memory of 2760	4664	2024-05-21_8ecb9d762611bb0e46b8abda615f8a05_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-21_8ecb9d762611bb0e46b8abda615f8a05_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_8ecb9d762611bb0e46b8abda615f8a05_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4664

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2760

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=3684 --field-trial-handle=2656,i,16940681401824032220,151921362336696246,262144 --variations-seed-version /prefetch:8
1⤵
PID:5052

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe
Filesize
49KB

MD5
c0569ccb8e59fe8e95c94eed1f3519a8

SHA1
041441c5df38ad519a4edd81f0f0c3779fc22222

SHA256
be001b525f58c10add8f367aecd8d226ca609075c1f8773370e1a036a952abf8

SHA512
a25f2183416d8d7e71fab3420b53b4d7a55cd5f77a0b513ca53cb180363a1d0a5bac95dde250f095b39f96b6afb22f525b59eaa2c012516d2bb3f513ee968804

Download Submit
memory/2760-17-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/2760-18-0x00000000007D0000-0x00000000007D6000-memory.dmp

Filesize
24KB

Download
memory/4664-0-0x00000000005F0000-0x00000000005F6000-memory.dmp

Filesize
24KB

Download
memory/4664-1-0x00000000005F0000-0x00000000005F6000-memory.dmp

Filesize
24KB

Download
memory/4664-2-0x00000000021B0000-0x00000000021B6000-memory.dmp

Filesize
24KB

Download