6178ddb132f7c7962304a445969dad28d74f2e11ac166133e4206343fd7fcb9e

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
28-02-2024 06:39

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General

Target

2024-02-28_a86b58c09be4602ef473448e023bc14f_cryptolocker.exe
Size

102KB
MD5

a86b58c09be4602ef473448e023bc14f
SHA1

b6252bcca789422e827b8afa735d23d3ad8b7def
SHA256

6178ddb132f7c7962304a445969dad28d74f2e11ac166133e4206343fd7fcb9e
SHA512

1068b3dc3515d7808db1af940ff2f25652651f9423299e2df20f83c1f5163e80916560680b5655dbb0db652e5266cd9fd9778e7871aeefd7f56ea870c8a1ef2a
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgpwqWsviy6r:AnBdOOtEvwDpj6z3

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3260-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000700000001ebc7-13.dat	CryptoLocker_rule2
behavioral2/memory/3260-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1696-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3260-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000700000001ebc7-13.dat	CryptoLocker_set1
behavioral2/memory/3260-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1696-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3260-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x000700000001ebc7-13.dat	UPX
behavioral2/memory/3260-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/1696-26-0x0000000000500000-0x000000000050F000-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-1-5-21-566096764-1992588923-1249862864-1000\Control Panel\International\Geo\Nation	2024-02-28_a86b58c09be4602ef473448e023bc14f_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1696	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3260-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x000700000001ebc7-13.dat	upx
behavioral2/memory/3260-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/1696-26-0x0000000000500000-0x000000000050F000-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 3260 wrote to memory of 1696	3260	2024-02-28_a86b58c09be4602ef473448e023bc14f_cryptolocker.exe	89
PID 3260 wrote to memory of 1696	3260	2024-02-28_a86b58c09be4602ef473448e023bc14f_cryptolocker.exe	89
PID 3260 wrote to memory of 1696	3260	2024-02-28_a86b58c09be4602ef473448e023bc14f_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-02-28_a86b58c09be4602ef473448e023bc14f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-28_a86b58c09be4602ef473448e023bc14f_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3260
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1696

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
102KB

MD5
3fe42544b2427884e6e427be20cb2b5a

SHA1
58ceea1a25a42b1fd9466999bef10207b51e043c

SHA256
92a59496d627c158c4b4c0bdae9355611c165e95c5f9b5a28b084372cda6c5d0

SHA512
3ec795cebc80a959c43cb5af178abedf439619179aa981f2944005dc2d21bfb4aedb7bf989dc6eabd66201d54eb279ec50430a275705b03505e228b806a50d35

Download Submit
memory/1696-19-0x0000000001FF0000-0x0000000001FF6000-memory.dmp

Filesize
24KB

Download
memory/1696-20-0x0000000001FC0000-0x0000000001FC6000-memory.dmp

Filesize
24KB

Download
memory/1696-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3260-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3260-1-0x0000000002200000-0x0000000002206000-memory.dmp

Filesize
24KB

Download
memory/3260-2-0x0000000002200000-0x0000000002206000-memory.dmp

Filesize
24KB

Download
memory/3260-3-0x0000000002220000-0x0000000002226000-memory.dmp

Filesize
24KB

Download
memory/3260-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download