bd9008a23dc09d2b5a85776dbdbaa9f2770a635e9e90e95144389d18c170cdc8

Analysis

max time kernel
150s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
27/03/2024, 05:27

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General

Target

2024-03-27_2be1dbd483daad2e2474ff3bfcef2ab6_cryptolocker.exe
Size

74KB
MD5

2be1dbd483daad2e2474ff3bfcef2ab6
SHA1

6d0efee2c729c72250b01919c76fdd3bcd494ce1
SHA256

bd9008a23dc09d2b5a85776dbdbaa9f2770a635e9e90e95144389d18c170cdc8
SHA512

79e1ed00a58afc9c7aca6aa2b70a67e242ca11485f029709a6e9770cbe4708c93b83c941b547bb8a001edf03e8282dc4dc505347dd80c900a65e8e860ec13d1f
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdxPUxH:T6a+rdOOtEvwDpjNtHPA

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/568-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023343-13.dat	CryptoLocker_rule2
behavioral2/memory/568-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2712-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/568-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000023343-13.dat	CryptoLocker_set1
behavioral2/memory/568-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2712-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/568-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0008000000023343-13.dat	UPX
behavioral2/memory/568-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2712-26-0x0000000000500000-0x0000000000510000-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-1-5-21-1904519900-954640453-4250331663-1000\Control Panel\International\Geo\Nation	2024-03-27_2be1dbd483daad2e2474ff3bfcef2ab6_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2712	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/568-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0008000000023343-13.dat	upx
behavioral2/memory/568-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2712-26-0x0000000000500000-0x0000000000510000-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 568 wrote to memory of 2712	568	2024-03-27_2be1dbd483daad2e2474ff3bfcef2ab6_cryptolocker.exe	96
PID 568 wrote to memory of 2712	568	2024-03-27_2be1dbd483daad2e2474ff3bfcef2ab6_cryptolocker.exe	96
PID 568 wrote to memory of 2712	568	2024-03-27_2be1dbd483daad2e2474ff3bfcef2ab6_cryptolocker.exe	96

C:\Users\Admin\AppData\Local\Temp\2024-03-27_2be1dbd483daad2e2474ff3bfcef2ab6_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-27_2be1dbd483daad2e2474ff3bfcef2ab6_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:568
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2712

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=3688 --field-trial-handle=2260,i,9938964625802268469,1928462186077019554,262144 --variations-seed-version /prefetch:8
1⤵
PID:3700

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
75KB

MD5
da2bf7f9265fd047d8e63de550222b7b

SHA1
8fee057f8fa9c96cbe2447a1b7059179d8dfd94f

SHA256
9c8e5d2d9f9196460b8151292ab5e937c8399f5cddabbcb1ca3eff4ea4dc281e

SHA512
246df7e249e5df70b94b82e3fa161439c9c00155a37b2d00a8fb3554ad454a0a0b6943294e533603b36f9cda579a0fa0913a0717f5f8adf5ddd71501b9afa8de

Download Submit
memory/568-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/568-1-0x0000000000840000-0x0000000000846000-memory.dmp

Filesize
24KB

Download
memory/568-2-0x0000000000840000-0x0000000000846000-memory.dmp

Filesize
24KB

Download
memory/568-3-0x0000000002110000-0x0000000002116000-memory.dmp

Filesize
24KB

Download
memory/568-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2712-19-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/2712-21-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2712-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download