e0c0c7103dc3170ec277ac25d031ac28e5955f56016b5eecb283a2ba1e3b03dc

Analysis

max time kernel
140s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
05/03/2024, 07:52

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General

Target

2024-03-05_afcbb774300595d998b0f0e692aa9953_cryptolocker.exe
Size

71KB
MD5

afcbb774300595d998b0f0e692aa9953
SHA1

58913a7d007652ae075269fe1ba7d65be2e49428
SHA256

e0c0c7103dc3170ec277ac25d031ac28e5955f56016b5eecb283a2ba1e3b03dc
SHA512

5d1ce435e5e567eff7d4e9bc3c1c78de7c04c656e42808162ca02e77b2358bcf334aef1f384e2ab3d797a81496a0661945b30c2843de63a2fb27b2a74ecd63f4
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsal3SJ:1nK6a+qdOOtEvwDpj8g

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4720-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000800000002324a-13.dat	CryptoLocker_rule2
behavioral2/memory/4720-25-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/5052-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4720-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000800000002324a-13.dat	CryptoLocker_set1
behavioral2/memory/4720-25-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/5052-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4720-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x000800000002324a-13.dat	UPX
behavioral2/memory/4720-25-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/5052-26-0x0000000000500000-0x000000000050F311-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	2024-03-05_afcbb774300595d998b0f0e692aa9953_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
5052	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4720-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x000800000002324a-13.dat	upx
behavioral2/memory/4720-25-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/5052-26-0x0000000000500000-0x000000000050F311-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 4720 wrote to memory of 5052	4720	2024-03-05_afcbb774300595d998b0f0e692aa9953_cryptolocker.exe	98
PID 4720 wrote to memory of 5052	4720	2024-03-05_afcbb774300595d998b0f0e692aa9953_cryptolocker.exe	98
PID 4720 wrote to memory of 5052	4720	2024-03-05_afcbb774300595d998b0f0e692aa9953_cryptolocker.exe	98

C:\Users\Admin\AppData\Local\Temp\2024-03-05_afcbb774300595d998b0f0e692aa9953_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-05_afcbb774300595d998b0f0e692aa9953_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4720
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:5052

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=4136 --field-trial-handle=2744,i,16362475727591565961,3676688664819797550,262144 --variations-seed-version /prefetch:8
1⤵
PID:4612

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
71KB

MD5
768d147487331cb47d0ebff07e5bb00c

SHA1
87e0042a30e26cf2dc1f790444128aae58f26941

SHA256
9a1846d902e6e0d2c33b6d038cae1d7250be5ec9def8fd9e2c7486e91f045904

SHA512
5007cf870880f5b6017555da7ba8eae9f4f575db46386b05f197e37fb0a159b9894d006779f491893817390ce01ad48c43b6ecb03b3667bdaffa13eef6e5d029

Download Submit
memory/4720-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/4720-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4720-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4720-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4720-25-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/5052-18-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/5052-19-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/5052-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download