706f1df9c67ec3e205dfce9f9144249891820978c4a2bc61964ba2b62ccd26ff

Analysis

max time kernel
141s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
09/04/2024, 11:33

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General

Target

2024-04-09_545b6e67ed7f0c27ac23b76857b68206_cryptolocker.exe
Size

65KB
MD5

545b6e67ed7f0c27ac23b76857b68206
SHA1

d505217cdee4fe86ca8b0335f88c271f6bb61339
SHA256

706f1df9c67ec3e205dfce9f9144249891820978c4a2bc61964ba2b62ccd26ff
SHA512

e41dfe2eca80e967fe730929eb385f6c636c25b6bcf040feb1d0acf4017708f80f32422dc1aacc119675253fe1d4c333cc30d58143f29483256715e78dc712e7
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjYjc3CBy:1nK6a+qdOOtEvwDpjsy

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2752-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0004000000022ea3-13.dat	CryptoLocker_rule2
behavioral2/memory/2752-25-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3680-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2752-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0004000000022ea3-13.dat	CryptoLocker_set1
behavioral2/memory/2752-25-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/3680-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2752-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x0004000000022ea3-13.dat	UPX
behavioral2/memory/2752-25-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/3680-26-0x0000000000500000-0x000000000050F311-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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-04-09_545b6e67ed7f0c27ac23b76857b68206_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3680	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2752-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x0004000000022ea3-13.dat	upx
behavioral2/memory/2752-25-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/3680-26-0x0000000000500000-0x000000000050F311-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 2752 wrote to memory of 3680	2752	2024-04-09_545b6e67ed7f0c27ac23b76857b68206_cryptolocker.exe	97
PID 2752 wrote to memory of 3680	2752	2024-04-09_545b6e67ed7f0c27ac23b76857b68206_cryptolocker.exe	97
PID 2752 wrote to memory of 3680	2752	2024-04-09_545b6e67ed7f0c27ac23b76857b68206_cryptolocker.exe	97

C:\Users\Admin\AppData\Local\Temp\2024-04-09_545b6e67ed7f0c27ac23b76857b68206_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-09_545b6e67ed7f0c27ac23b76857b68206_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2752
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3680

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=1416 --field-trial-handle=3240,i,13319578961094268484,16557498665191861597,262144 --variations-seed-version /prefetch:8
1⤵
PID:4360

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
65KB

MD5
9c139f0bc1cd7180bd7089194140e8b6

SHA1
0bf2bf47ef96cae075cf323c6d90fb97bc22234d

SHA256
c14db5d4b545673a645518c5670f05b07c6564d387a59e156dfada6eee4abd71

SHA512
bfb32ef26c7447ff9786b2aac8f206de108e610781f1b085c1e2e718c1d8376f9f46846ac85f07c1a6fa580a9a4fc9cd104707d6dc5fea002bde2ffce585e484

Download Submit
memory/2752-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2752-1-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/2752-2-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/2752-3-0x0000000002080000-0x0000000002086000-memory.dmp

Filesize
24KB

Download
memory/2752-25-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3680-18-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/3680-19-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/3680-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download