5ed9906031e40939acafd1e02a12dd9985d4b183c40ab31d133dc4b1ef23719e

Analysis

max time kernel
148s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
05/06/2024, 00:34

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General

Target

2024-06-05_636b98cb98d672e90aa139da1f83b8ca_cryptolocker.exe
Size

91KB
MD5

636b98cb98d672e90aa139da1f83b8ca
SHA1

33f258cc18cb64cf7b8eac3f34c6e2516b299881
SHA256

5ed9906031e40939acafd1e02a12dd9985d4b183c40ab31d133dc4b1ef23719e
SHA512

87328cd14d44d70feafb690faae6025b7395bb1ddc97d15bd74b17d15c2681c9176f516a01b2253f08d8cb1742687dd728f45c83eb6a55eda435c7fd652759bf
SSDEEP

1536:n6QFElP6n+g9u9cvMOtEvwDpjYYTjipvF2bx1PQAA/Lp:n6a+1SEOtEvwDpjYYvQd2PW

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1768-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0009000000023547-13.dat	CryptoLocker_rule2
behavioral2/memory/1768-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1760-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1768-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0009000000023547-13.dat	CryptoLocker_set1
behavioral2/memory/1768-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1760-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1768-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0009000000023547-13.dat	UPX
behavioral2/memory/1768-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1760-26-0x0000000000500000-0x0000000000510000-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-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation	2024-06-05_636b98cb98d672e90aa139da1f83b8ca_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1760	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1768-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0009000000023547-13.dat	upx
behavioral2/memory/1768-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1760-26-0x0000000000500000-0x0000000000510000-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 1768 wrote to memory of 1760	1768	2024-06-05_636b98cb98d672e90aa139da1f83b8ca_cryptolocker.exe	90
PID 1768 wrote to memory of 1760	1768	2024-06-05_636b98cb98d672e90aa139da1f83b8ca_cryptolocker.exe	90
PID 1768 wrote to memory of 1760	1768	2024-06-05_636b98cb98d672e90aa139da1f83b8ca_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-06-05_636b98cb98d672e90aa139da1f83b8ca_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-05_636b98cb98d672e90aa139da1f83b8ca_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1768
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1760

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=3452,i,16710585221322798697,8586257254049248207,262144 --variations-seed-version --mojo-platform-channel-handle=4432 /prefetch:8
1⤵
PID:2284

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
91KB

MD5
978b981045ca846d1a54feecfe738f90

SHA1
d137d7e0b92f0721299d357514d788f5b008b0ed

SHA256
0f0017b247df99a0f5271c0a09f1c656a420773dbcd65202771aa43163adbd71

SHA512
e56c10e32e386ca3c21244b9fbc81a515ce022428bff1838ef98fe939e7d9e1dc7f79729508e9d7be10a8e921af9ebcf563739d6b835ad5487814b139f2bda14

Download Submit
memory/1760-25-0x0000000000840000-0x0000000000846000-memory.dmp

Filesize
24KB

Download
memory/1760-19-0x0000000000860000-0x0000000000866000-memory.dmp

Filesize
24KB

Download
memory/1760-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1768-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1768-1-0x00000000020D0000-0x00000000020D6000-memory.dmp

Filesize
24KB

Download
memory/1768-9-0x00000000020D0000-0x00000000020D6000-memory.dmp

Filesize
24KB

Download
memory/1768-2-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/1768-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download