91a1926b79b23e1d08e660fe69999ab9463149fe3e8003d166c8b408d09c4dac

Analysis

max time kernel
149s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
12/03/2024, 15:52

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General

Target

2024-03-12_eb8df0b24bd1a89b5cdebe066ec28e22_cryptolocker.exe
Size

80KB
MD5

eb8df0b24bd1a89b5cdebe066ec28e22
SHA1

4a87c6dffd63f8aa2d0b0eb44498643ade4844a8
SHA256

91a1926b79b23e1d08e660fe69999ab9463149fe3e8003d166c8b408d09c4dac
SHA512

adb8c7ba26f702b65a245c1fa9a5c83e9ea2ef1c417aea5fd0dfee9b7df14d1aa43895b3cc0cd6a73978c3bca4c1173465382f00342f00d1602d904828c42726
SSDEEP

1536:zj+soPSMOtEvwDpj4ktBl01hJ0tq1kySeM:zCsanOtEvwDpjn

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3564-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023242-13.dat	CryptoLocker_rule2
behavioral2/memory/3564-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2224-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3564-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0007000000023242-13.dat	CryptoLocker_set1
behavioral2/memory/3564-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2224-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3564-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0007000000023242-13.dat	UPX
behavioral2/memory/3564-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2224-26-0x0000000000500000-0x0000000000510000-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-1-5-21-513485977-2495024337-1260977654-1000\Control Panel\International\Geo\Nation	2024-03-12_eb8df0b24bd1a89b5cdebe066ec28e22_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2224	misid.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3564-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0007000000023242-13.dat	upx
behavioral2/memory/3564-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2224-26-0x0000000000500000-0x0000000000510000-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 3564 wrote to memory of 2224	3564	2024-03-12_eb8df0b24bd1a89b5cdebe066ec28e22_cryptolocker.exe	88
PID 3564 wrote to memory of 2224	3564	2024-03-12_eb8df0b24bd1a89b5cdebe066ec28e22_cryptolocker.exe	88
PID 3564 wrote to memory of 2224	3564	2024-03-12_eb8df0b24bd1a89b5cdebe066ec28e22_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-03-12_eb8df0b24bd1a89b5cdebe066ec28e22_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-12_eb8df0b24bd1a89b5cdebe066ec28e22_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3564
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Executes dropped EXE
  PID:2224

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\misid.exe

Filesize
80KB

MD5
db481ee47658f30f884cd553eb1f957f

SHA1
bc66cb9c961ed11eff69f87caee8224bc7b6b594

SHA256
426bbcae5e8633d54321ea641770aa5c9bd7ffe99bcb72039805ef0ec9773151

SHA512
1ffbd30d47042fe9f799460469bcf1f393ae99d366d27243d382e379e1ec54c45b69f60eacd8706914c3ec5af9597397b477e729cc0ca585f65041682241926e

Download Submit
memory/2224-19-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/2224-22-0x0000000000730000-0x0000000000736000-memory.dmp

Filesize
24KB

Download
memory/2224-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3564-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3564-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/3564-2-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/3564-3-0x0000000000510000-0x0000000000516000-memory.dmp

Filesize
24KB

Download
memory/3564-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download