56c506e1aafad5a70d6a4f4db22bcca548eeb113746eea434d30f543aa83f05e

Analysis

max time kernel
147s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
28/03/2024, 00:42

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General

Target

2024-03-28_08504b0a05384ff6a5433a3779f38faf_cryptolocker.exe
Size

92KB
MD5

08504b0a05384ff6a5433a3779f38faf
SHA1

4888fde6e4cd3edb7ca4246265868a2f2b711082
SHA256

56c506e1aafad5a70d6a4f4db22bcca548eeb113746eea434d30f543aa83f05e
SHA512

403300d0c866e8a9a141a0aae452c8207ad92f6f0382e10ce341629c6d79ce17cf277f920de15945c0bd2c5247971c6cfc228e3356935d7187ef622bb081464a
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgp01O:AnBdOOtEvwDpj6zQ

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/3004-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3004-10-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x001000000002324f-15.dat	CryptoLocker_rule2
behavioral2/memory/1116-19-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1116-29-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/3004-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3004-10-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x001000000002324f-15.dat	CryptoLocker_set1
behavioral2/memory/1116-19-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1116-29-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/3004-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/3004-10-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x001000000002324f-15.dat	UPX
behavioral2/memory/1116-19-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/1116-29-0x0000000000500000-0x000000000050F000-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	2024-03-28_08504b0a05384ff6a5433a3779f38faf_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1116	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3004-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/3004-10-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x001000000002324f-15.dat	upx
behavioral2/memory/1116-19-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/1116-29-0x0000000000500000-0x000000000050F000-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 3004 wrote to memory of 1116	3004	2024-03-28_08504b0a05384ff6a5433a3779f38faf_cryptolocker.exe	94
PID 3004 wrote to memory of 1116	3004	2024-03-28_08504b0a05384ff6a5433a3779f38faf_cryptolocker.exe	94
PID 3004 wrote to memory of 1116	3004	2024-03-28_08504b0a05384ff6a5433a3779f38faf_cryptolocker.exe	94

C:\Users\Admin\AppData\Local\Temp\2024-03-28_08504b0a05384ff6a5433a3779f38faf_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-28_08504b0a05384ff6a5433a3779f38faf_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3004
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1116

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=4412 --field-trial-handle=2676,i,447940133669489189,1353734109898858672,262144 --variations-seed-version /prefetch:8
1⤵
PID:4416

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
92KB

MD5
0acb8695586f95c1f948684a72b4b051

SHA1
ff9545c19b0d97cd779ff4604dc75d8d3ad4d7cf

SHA256
524387b4e345d79626b0f75b067924d368de8f235ce52289c5ca21d80fd8ac71

SHA512
3fec2b17d0bfdfa52d2d73841b520596f67ddbf2bb6d098e919d05f051715413b107c8e109463d738cbb8ce7dfa8d35aa3b4bdf00c37aa1a288910e69eacf9cb

Download Submit
memory/1116-19-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1116-22-0x0000000000640000-0x0000000000646000-memory.dmp

Filesize
24KB

Download
memory/1116-21-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/1116-29-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3004-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3004-1-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download
memory/3004-2-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download
memory/3004-3-0x0000000002040000-0x0000000002046000-memory.dmp

Filesize
24KB

Download
memory/3004-10-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download