691bd76a801ffa36123118d6dd30d2e2b4ddc627665655b6fa1f83035aaa70c2

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
06/06/2024, 07:24

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General

Target

2024-06-06_59a1e256ad6f2117e8c18c2942d3c1c6_cryptolocker.exe
Size

41KB
MD5

59a1e256ad6f2117e8c18c2942d3c1c6
SHA1

aaa4a4b0d5a8cd47f400749087b5f4dc8b39642c
SHA256

691bd76a801ffa36123118d6dd30d2e2b4ddc627665655b6fa1f83035aaa70c2
SHA512

0ad50a6e405a9d63c492e13212488c69cd245aea87292b1ad5fdeb506c0ea1f3cb7106f676d0ca863c3b1350ac7295fd4dd0cefb57417767d7105f68c509a092
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITY/0p:qDdFJy3QMOtEvwDpjjWMl7TF

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3408-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023289-13.dat	CryptoLocker_rule2
behavioral2/memory/3408-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/5024-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3408-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0007000000023289-13.dat	CryptoLocker_set1
behavioral2/memory/3408-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/5024-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3408-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0007000000023289-13.dat	UPX
behavioral2/memory/3408-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/5024-26-0x0000000000500000-0x0000000000510000-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-1-5-21-3906287020-2915474608-1755617787-1000\Control Panel\International\Geo\Nation	2024-06-06_59a1e256ad6f2117e8c18c2942d3c1c6_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
5024	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3408-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0007000000023289-13.dat	upx
behavioral2/memory/3408-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/5024-26-0x0000000000500000-0x0000000000510000-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 3408 wrote to memory of 5024	3408	2024-06-06_59a1e256ad6f2117e8c18c2942d3c1c6_cryptolocker.exe	83
PID 3408 wrote to memory of 5024	3408	2024-06-06_59a1e256ad6f2117e8c18c2942d3c1c6_cryptolocker.exe	83
PID 3408 wrote to memory of 5024	3408	2024-06-06_59a1e256ad6f2117e8c18c2942d3c1c6_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-06-06_59a1e256ad6f2117e8c18c2942d3c1c6_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-06_59a1e256ad6f2117e8c18c2942d3c1c6_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3408
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:5024

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
41KB

MD5
459d347093694055fb83c9cddc9ce2fe

SHA1
3df9f708eef8e9646c25bf4dcc4d7e3690e6134b

SHA256
01b8d919777bb77fc09156bf88b69815fd8e6fb27bc4dff00ac52b93546d7cf2

SHA512
9c6c0e1dd4205595eb2600d4c318a3daa806033e018130ceb449b579b0d76436b527c33c8c82ac97098149e2cc24e01d26f10d5f4871f1ca1279d594e3c1032f

Download Submit
memory/3408-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3408-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/3408-2-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/3408-9-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/3408-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/5024-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/5024-25-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/5024-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download