f073d3af6616b9696c0c1d604c602cd5df67594124444fa48b6f9a486baaea8a

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
13-03-2024 00:39

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General

Target

2024-03-13_b1654bdf0a30a499f70a8105b9e26ff4_cryptolocker.exe
Size

71KB
MD5

b1654bdf0a30a499f70a8105b9e26ff4
SHA1

7605f4a5758c4385d2e67b28455b769996a9ce6e
SHA256

f073d3af6616b9696c0c1d604c602cd5df67594124444fa48b6f9a486baaea8a
SHA512

e99174486405bdbd06c44fd833ed90d86e076d8c565ca73a89d8097387ff290042b8435876c820c084989b412b062dfcb997f0d70a98bd410277c3f987feb458
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj9aYaFAeBW:z6a+CdOOtEvwDpjQI

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4584-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000400000001e5eb-13.dat	CryptoLocker_rule2
behavioral2/memory/4584-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1584-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4584-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000400000001e5eb-13.dat	CryptoLocker_set1
behavioral2/memory/4584-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1584-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4584-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000400000001e5eb-13.dat	UPX
behavioral2/memory/4584-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1584-26-0x0000000000500000-0x0000000000510000-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-1-5-21-983155329-280873152-1838004294-1000\Control Panel\International\Geo\Nation	2024-03-13_b1654bdf0a30a499f70a8105b9e26ff4_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1584	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4584-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000400000001e5eb-13.dat	upx
behavioral2/memory/4584-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1584-26-0x0000000000500000-0x0000000000510000-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 4584 wrote to memory of 1584	4584	2024-03-13_b1654bdf0a30a499f70a8105b9e26ff4_cryptolocker.exe	88
PID 4584 wrote to memory of 1584	4584	2024-03-13_b1654bdf0a30a499f70a8105b9e26ff4_cryptolocker.exe	88
PID 4584 wrote to memory of 1584	4584	2024-03-13_b1654bdf0a30a499f70a8105b9e26ff4_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-03-13_b1654bdf0a30a499f70a8105b9e26ff4_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-13_b1654bdf0a30a499f70a8105b9e26ff4_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4584
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1584

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
71KB

MD5
12720be545b8ecd150cc9342a5e8b009

SHA1
c51f17d72ca357d82dfbbd656b3bf9906c4a1b7c

SHA256
fa6caeb21a4bbc242f9becb960cdfaae905f5a3445adedb8e1cdd9bff5f98f5a

SHA512
b7da173eaea9e93e35c5ebaf35a7a83417c05b3f30ef6b52497c6323b08bda102595bc9d6c62d15e855b8668528160dc2da54ed632734a31043413e2f05aed37

Download Submit
memory/1584-19-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/1584-21-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/1584-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4584-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4584-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4584-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4584-3-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/4584-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download