5e2c758e3acb982c7ef2c21d6365d204eaf2dcdad558fad0eea685df0606c12e

Analysis

max time kernel
146s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240319-en
resource tags

arch:x64arch:x86image:win10v2004-20240319-enlocale:en-usos:windows10-2004-x64system
submitted
25/03/2024, 13:29

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General

Target

2024-03-25_388976866757d6a303c4f543930406ae_cryptolocker.exe
Size

71KB
MD5

388976866757d6a303c4f543930406ae
SHA1

d3c26c53a538ac1b229e95bbc3a9bf1157cac6d6
SHA256

5e2c758e3acb982c7ef2c21d6365d204eaf2dcdad558fad0eea685df0606c12e
SHA512

15d88894182323f487dd2badd1916256a6f300f8dd663d6db14c73e838753f39f38dab0035d480711b3f8f5952108571a2e99768dabd22f40149b4a5f07ea445
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsalV8:1nK6a+qdOOtEvwDpjn

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3736-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000400000001db72-13.dat	CryptoLocker_rule2
behavioral2/memory/3736-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/988-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3736-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000400000001db72-13.dat	CryptoLocker_set1
behavioral2/memory/3736-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/988-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3736-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x000400000001db72-13.dat	UPX
behavioral2/memory/3736-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/988-26-0x0000000000500000-0x000000000050F311-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-1-5-21-817259280-2658881748-983986378-1000\Control Panel\International\Geo\Nation	2024-03-25_388976866757d6a303c4f543930406ae_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
988	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3736-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x000400000001db72-13.dat	upx
behavioral2/memory/3736-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/988-26-0x0000000000500000-0x000000000050F311-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 3736 wrote to memory of 988	3736	2024-03-25_388976866757d6a303c4f543930406ae_cryptolocker.exe	98
PID 3736 wrote to memory of 988	3736	2024-03-25_388976866757d6a303c4f543930406ae_cryptolocker.exe	98
PID 3736 wrote to memory of 988	3736	2024-03-25_388976866757d6a303c4f543930406ae_cryptolocker.exe	98

C:\Users\Admin\AppData\Local\Temp\2024-03-25_388976866757d6a303c4f543930406ae_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-25_388976866757d6a303c4f543930406ae_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3736
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:988

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=3976 --field-trial-handle=2276,i,5672504106535478802,17394903851940863593,262144 --variations-seed-version /prefetch:8
1⤵
PID:5044

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
72KB

MD5
c05ebeac88bf425aba49f304277339ea

SHA1
025ad7d3721212cf7a218e493e64bf3b79ca8f96

SHA256
9ae7c647e9b8c0ef2315516871dc30daf38c5dd6668499e321d85c2406e0f4d1

SHA512
3932ee83c921fdb82d9017b3c478fd1f0cdc57bbe18924ef5d160ad3acbea9f3c977df847f6fb94c8bd404144aec3925155e8827473f80d126d4a0b3b24c6a3e

Download Submit
memory/988-20-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/988-19-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/988-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3736-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3736-1-0x0000000000870000-0x0000000000876000-memory.dmp

Filesize
24KB

Download
memory/3736-2-0x0000000000870000-0x0000000000876000-memory.dmp

Filesize
24KB

Download
memory/3736-3-0x0000000000890000-0x0000000000896000-memory.dmp

Filesize
24KB

Download
memory/3736-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download