21d0f822102d03df49197644d8b32d2839ef7d51830082a41ad149c059bc9d29

Analysis

max time kernel
141s
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
08-03-2024 07:41

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General

Target

2024-03-08_e6d0766cc4a0b186282fbf8aafee1b79_cryptolocker.exe
Size

61KB
MD5

e6d0766cc4a0b186282fbf8aafee1b79
SHA1

0881a08b243871d5a34bb1cd768271f3614859f4
SHA256

21d0f822102d03df49197644d8b32d2839ef7d51830082a41ad149c059bc9d29
SHA512

0a0f7174bcb30b0001783d04e282b9cd17948eb20a8703d5f87daf32ed070448f53d78b4660bbba878508950a5e3981dfb0d8019807d4ab13653d4cdb54102d9
SSDEEP

768:T6LsoEEeegiZPvEhHSG+gkum/kLyMro2GtOOtEvwDpjhXMLamkc8J5h6GM:T6QFElP6n+gxmddpMOtEvwDpjwa34X

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2688-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000900000002324b-13.dat	CryptoLocker_rule2
behavioral2/memory/2688-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2936-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2688-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000900000002324b-13.dat	CryptoLocker_set1
behavioral2/memory/2688-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2936-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2688-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000900000002324b-13.dat	UPX
behavioral2/memory/2688-25-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2936-26-0x0000000000500000-0x0000000000510000-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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-03-08_e6d0766cc4a0b186282fbf8aafee1b79_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2936	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2688-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000900000002324b-13.dat	upx
behavioral2/memory/2688-25-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2936-26-0x0000000000500000-0x0000000000510000-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 2688 wrote to memory of 2936	2688	2024-03-08_e6d0766cc4a0b186282fbf8aafee1b79_cryptolocker.exe	101
PID 2688 wrote to memory of 2936	2688	2024-03-08_e6d0766cc4a0b186282fbf8aafee1b79_cryptolocker.exe	101
PID 2688 wrote to memory of 2936	2688	2024-03-08_e6d0766cc4a0b186282fbf8aafee1b79_cryptolocker.exe	101

C:\Users\Admin\AppData\Local\Temp\2024-03-08_e6d0766cc4a0b186282fbf8aafee1b79_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-08_e6d0766cc4a0b186282fbf8aafee1b79_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2688
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2936

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=1420 --field-trial-handle=1928,i,13242902252791919845,10377620236057253993,262144 --variations-seed-version /prefetch:8
1⤵
PID:2688

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
61KB

MD5
d424d1facb5ae70bcfa8608ccf083677

SHA1
1d53fc466372b45ad009db7cb57d380610b3c354

SHA256
459e421cbd8264bede4a90168408e7c5da8d4e0410080e67c6db2851b1f3c2a9

SHA512
37b23ac8c9fb0aecd33746acf2155b397feadfefd2fd0a2feff8b42020140a12d5384a74388436ae08418c0f008ed4e66cfcd654d3c8c6875d276fee3f373001

Download Submit
memory/2688-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2688-1-0x0000000002140000-0x0000000002146000-memory.dmp

Filesize
24KB

Download
memory/2688-2-0x0000000002140000-0x0000000002146000-memory.dmp

Filesize
24KB

Download
memory/2688-3-0x0000000002060000-0x0000000002066000-memory.dmp

Filesize
24KB

Download
memory/2688-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2936-18-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/2936-22-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/2936-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download