ced6ec3fd9c9428cfbcf6aeacfe4727438900ff9118b3b560bfe2f8668903ec1

Analysis

max time kernel
142s
max time network
158s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
15/03/2024, 13:42

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General

Target

2024-03-15_672cbd9ad71ad85c9dcce93e3de93766_cryptolocker.exe
Size

82KB
MD5

672cbd9ad71ad85c9dcce93e3de93766
SHA1

c1651030b2776893a84faeec62c56e20a0a58f53
SHA256

ced6ec3fd9c9428cfbcf6aeacfe4727438900ff9118b3b560bfe2f8668903ec1
SHA512

2045c64adee57086f36be1a129b41fc66bdedea2baefcbfc493f1c403df9ca9c904aeb20032194642c6675e68b77fffdf7472b10ab71c62859f86aab2254ed13
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOT7G3:T6a+rdOOtEvwDpjNK

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3660-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000800000002324b-13.dat	CryptoLocker_rule2
behavioral2/memory/3660-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2984-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3660-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000800000002324b-13.dat	CryptoLocker_set1
behavioral2/memory/3660-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2984-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3660-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000800000002324b-13.dat	UPX
behavioral2/memory/3660-25-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2984-26-0x0000000000500000-0x0000000000510000-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	2024-03-15_672cbd9ad71ad85c9dcce93e3de93766_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2984	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3660-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000800000002324b-13.dat	upx
behavioral2/memory/3660-25-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2984-26-0x0000000000500000-0x0000000000510000-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 3660 wrote to memory of 2984	3660	2024-03-15_672cbd9ad71ad85c9dcce93e3de93766_cryptolocker.exe	100
PID 3660 wrote to memory of 2984	3660	2024-03-15_672cbd9ad71ad85c9dcce93e3de93766_cryptolocker.exe	100
PID 3660 wrote to memory of 2984	3660	2024-03-15_672cbd9ad71ad85c9dcce93e3de93766_cryptolocker.exe	100

C:\Users\Admin\AppData\Local\Temp\2024-03-15_672cbd9ad71ad85c9dcce93e3de93766_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-15_672cbd9ad71ad85c9dcce93e3de93766_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3660
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2984

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=1408 --field-trial-handle=2744,i,16362475727591565961,3676688664819797550,262144 --variations-seed-version /prefetch:8
1⤵
PID:3168

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
82KB

MD5
c8e4e21839afbefd93543f2cd532cf57

SHA1
e8504c4d2ec4e593555fd290ec3ecc5cdc02d4aa

SHA256
8bfe3493061f1970e8203e3a0a099da850efff8c615099fe21ad693a38015deb

SHA512
f2e7b056017fdaf1c818ec19d6f6f54f31a78592aa2b44c6c338209cc15b0d2dee2f5edf9a411e81b6561baa0c62467289b60cc5f1b271e1c3b8628c12e0ab6f

Download Submit
memory/2984-18-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/2984-20-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/2984-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3660-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3660-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3660-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3660-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3660-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download