7acb7a1cdd8e9ff3c7f4892b28188a069490ff518dd7c080236d3c1b21ce76b6

Analysis

max time kernel
149s
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
14/03/2024, 11:41

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General

Target

2024-03-14_87b1503a535c46e9d922a38c99c1e38d_cryptolocker.exe
Size

62KB
MD5

87b1503a535c46e9d922a38c99c1e38d
SHA1

9f810de8410021bb5358096e68f2dc3097e768ba
SHA256

7acb7a1cdd8e9ff3c7f4892b28188a069490ff518dd7c080236d3c1b21ce76b6
SHA512

2088a4fbea5763e58f6717405234c832bf8c4833413336bfd20a48eb6e760cc084edb8e79c989307e7be47040b2f7eba600e70662c8e1dc1a8a4782d6b5a5671
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61vSbgts6S:BbdDmjr+OtEvwDpjM8P

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1600-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023322-13.dat	CryptoLocker_rule2
behavioral2/memory/1600-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2148-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/1600-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2148-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1600-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0007000000023322-13.dat	UPX
behavioral2/memory/1600-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2148-26-0x0000000000500000-0x0000000000510000-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	2024-03-14_87b1503a535c46e9d922a38c99c1e38d_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2148	asih.exe

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 1600 wrote to memory of 2148	1600	2024-03-14_87b1503a535c46e9d922a38c99c1e38d_cryptolocker.exe	97
PID 1600 wrote to memory of 2148	1600	2024-03-14_87b1503a535c46e9d922a38c99c1e38d_cryptolocker.exe	97
PID 1600 wrote to memory of 2148	1600	2024-03-14_87b1503a535c46e9d922a38c99c1e38d_cryptolocker.exe	97

C:\Users\Admin\AppData\Local\Temp\2024-03-14_87b1503a535c46e9d922a38c99c1e38d_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-14_87b1503a535c46e9d922a38c99c1e38d_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1600
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2148

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=3748 --field-trial-handle=3044,i,17059189006398306756,4247826696353232857,262144 --variations-seed-version /prefetch:8
1⤵
PID:4700

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
62KB

MD5
ae82d837df9cc5f586068c9152511855

SHA1
deabd5a0640ac92959ca2191b70d23564676da98

SHA256
95deebe9580a1e5dab85e2d63c72888687fefb821b38ff3105729290af581067

SHA512
20abc41279e0ff05dc0fbb0d888383da11e9209cdae924d0b3a97bde9be854befa7298c91e388c16784fb18d094ff5ad8e136e41cb14e86fe3fa2bf9bef19533

Download Submit
memory/1600-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1600-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1600-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1600-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1600-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2148-19-0x0000000001F70000-0x0000000001F76000-memory.dmp

Filesize
24KB

Download
memory/2148-21-0x0000000001F50000-0x0000000001F56000-memory.dmp

Filesize
24KB

Download
memory/2148-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download