b378d9cb56f4828ae28ac53603a8541346510e1484dc2f36abef2641f7487678

Analysis

max time kernel
145s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
18/04/2024, 12:36

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General

Target

2024-04-18_59a5eb6ef8a2ce3f4da88feab58e563d_cryptolocker.exe
Size

51KB
MD5

59a5eb6ef8a2ce3f4da88feab58e563d
SHA1

c09a037d7e785a6e1d7d26d8ec1792bbf48f80ed
SHA256

b378d9cb56f4828ae28ac53603a8541346510e1484dc2f36abef2641f7487678
SHA512

df8afcec514cb6d134593f2ecb7fa766ba7021eaf258ee1cee7d8f648ba631ff99b7504d2e4395b1eb0e5046b1cbdd14a3bd1299985aef80919119367d705cdd
SSDEEP

768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YY1J+OTOL:z6QFElP6n+gKmddpMOtEvwDpj31iL

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1380-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000b000000023227-13.dat	CryptoLocker_rule2
behavioral2/memory/1380-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/452-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1380-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000b000000023227-13.dat	CryptoLocker_set1
behavioral2/memory/1380-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/452-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1380-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000b000000023227-13.dat	UPX
behavioral2/memory/1380-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/452-26-0x0000000000500000-0x0000000000510000-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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-04-18_59a5eb6ef8a2ce3f4da88feab58e563d_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
452	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1380-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000b000000023227-13.dat	upx
behavioral2/memory/1380-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/452-26-0x0000000000500000-0x0000000000510000-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 1380 wrote to memory of 452	1380	2024-04-18_59a5eb6ef8a2ce3f4da88feab58e563d_cryptolocker.exe	91
PID 1380 wrote to memory of 452	1380	2024-04-18_59a5eb6ef8a2ce3f4da88feab58e563d_cryptolocker.exe	91
PID 1380 wrote to memory of 452	1380	2024-04-18_59a5eb6ef8a2ce3f4da88feab58e563d_cryptolocker.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-04-18_59a5eb6ef8a2ce3f4da88feab58e563d_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-18_59a5eb6ef8a2ce3f4da88feab58e563d_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1380
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:452

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=1860 --field-trial-handle=2256,i,6670388345726423024,18382795228658886258,262144 --variations-seed-version /prefetch:8
1⤵
PID:3080

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
51KB

MD5
3c8884b0826efa8171d4019908df8390

SHA1
d83463e04cc71bd6ac5439e5427f63ed9c5f6f3c

SHA256
502fc5d69ee7874692a83b71e4cb4992dc21262e36cba2dfeef68dd2d7c8a9ac

SHA512
53ae411c9493dbf0d7daf966252f50df8565c86474cd40d0d754e19dfcdc8bf2062e8080bf933959bdc3a7f6210727237c6800cc064c1b8d58178a70e2202796

Download Submit
memory/452-19-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/452-24-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/452-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1380-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1380-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1380-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1380-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1380-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download