0d2cee9667c730f482bb79a2cda45d0e349608e27528338d98652143cd8a8dd3

Analysis

max time kernel
151s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
29/02/2024, 03:47

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General

Target

2024-02-29_ca8cc8615c6b62ededcb24ee1b25e262_cryptolocker.exe
Size

78KB
MD5

ca8cc8615c6b62ededcb24ee1b25e262
SHA1

775bf524f9bc75f35105520a12c9ad8cb1b4634b
SHA256

0d2cee9667c730f482bb79a2cda45d0e349608e27528338d98652143cd8a8dd3
SHA512

9745cd2e726c81a2839a6bf1279d530b1b2808fa55f11247ab74ddfc4ca6d02036c872e77492b06953629a3862b0d4f244be39dd842bfc4edd9474ceda7eed09
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOA+YSP7e:T6a+rdOOtEvwDpjNg

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3864-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000022745-13.dat	CryptoLocker_rule2
behavioral2/memory/3864-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3668-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3864-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000022745-13.dat	CryptoLocker_set1
behavioral2/memory/3864-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3668-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3864-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0008000000022745-13.dat	UPX
behavioral2/memory/3864-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3668-26-0x0000000000500000-0x0000000000510000-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-1-5-21-3045580317-3728985860-206385570-1000\Control Panel\International\Geo\Nation	2024-02-29_ca8cc8615c6b62ededcb24ee1b25e262_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3668	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3864-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0008000000022745-13.dat	upx
behavioral2/memory/3864-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3668-26-0x0000000000500000-0x0000000000510000-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 3864 wrote to memory of 3668	3864	2024-02-29_ca8cc8615c6b62ededcb24ee1b25e262_cryptolocker.exe	89
PID 3864 wrote to memory of 3668	3864	2024-02-29_ca8cc8615c6b62ededcb24ee1b25e262_cryptolocker.exe	89
PID 3864 wrote to memory of 3668	3864	2024-02-29_ca8cc8615c6b62ededcb24ee1b25e262_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-02-29_ca8cc8615c6b62ededcb24ee1b25e262_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-29_ca8cc8615c6b62ededcb24ee1b25e262_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3864
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3668

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
78KB

MD5
3ef1311ab046f17d002ae345fd8bb66d

SHA1
a12ecdd30ef9cf70f900b617ecee65f0f3ddcbf5

SHA256
da79e796446b026f43f332c26199138e2cac0eb990ea65ec7d4b31f0d39dafd9

SHA512
562820e80eb1e3f9b316719d26cd58dec62497fa1d7debcc62b65491e0d13dd7f197f8ac08c41a4e097602c23558e3e730e329412aac36477ffd1e7dd241df0b

Download Submit
memory/3668-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3668-21-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3668-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3864-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3864-1-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/3864-2-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/3864-3-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/3864-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download