cad4e0574f4321cb7086ecd8a68644998bc5739f3756204d387364a1e98e153c

Analysis

max time kernel
151s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
26/04/2024, 23:22

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General

Target

2024-04-26_27aa71ffb977cc758036886c741d8aa4_cryptolocker.exe
Size

40KB
MD5

27aa71ffb977cc758036886c741d8aa4
SHA1

1bec9f3d5bcef0512e2be6b4866bf403bf93d614
SHA256

cad4e0574f4321cb7086ecd8a68644998bc5739f3756204d387364a1e98e153c
SHA512

7f0eb32ef12ad269d6e27086dbebd23bec5262630d46cf60c031b50945bcd77765c1688f2a9d9104f13f1b76fa44b8cfeefbb02545afd0e95c17a75c5d89c101
SSDEEP

384:ba74uGLLQRcsdeQ72ngEr4K7YmE8j6CQYnrz1ZhdaXFXSCVQTLfjDpXqxKHaZ:ba74zYcgT/EkdCQgpwXFXSqQXfj0xKg

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/380-0-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000f00000002324d-13.dat	CryptoLocker_rule2
behavioral2/memory/380-18-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1988-26-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/380-0-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/files/0x000f00000002324d-13.dat	UPX
behavioral2/memory/380-18-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/memory/1988-26-0x0000000008000000-0x000000000800F000-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	2024-04-26_27aa71ffb977cc758036886c741d8aa4_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1988	hasfj.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/380-0-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/files/0x000f00000002324d-13.dat	upx
behavioral2/memory/380-18-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/memory/1988-26-0x0000000008000000-0x000000000800F000-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 380 wrote to memory of 1988	380	2024-04-26_27aa71ffb977cc758036886c741d8aa4_cryptolocker.exe	91
PID 380 wrote to memory of 1988	380	2024-04-26_27aa71ffb977cc758036886c741d8aa4_cryptolocker.exe	91
PID 380 wrote to memory of 1988	380	2024-04-26_27aa71ffb977cc758036886c741d8aa4_cryptolocker.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-04-26_27aa71ffb977cc758036886c741d8aa4_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-26_27aa71ffb977cc758036886c741d8aa4_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:380
- C:\Users\Admin\AppData\Local\Temp\hasfj.exe
  "C:\Users\Admin\AppData\Local\Temp\hasfj.exe"
  2⤵
  - Executes dropped EXE
  PID:1988

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=1028 --field-trial-handle=2272,i,4858140932023865871,5726683989663339295,262144 --variations-seed-version /prefetch:8
1⤵
PID:1448

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\hasfj.exe

Filesize
40KB

MD5
c5922fba53b21dff10c388322e28ff7e

SHA1
1b74ffda2113dc422628ad3b2f36581f999fafb5

SHA256
2fcb0fb3d1f071e8edb6a9e5011b454cda6c675e9fa08686b63041e8ad084764

SHA512
5fa004a9e5f0403ed78676fa3c0dfae843b0c3ff49a0c26b0e982a103c25336e5c340297215107131b094946eba9d5f8db889dfdae42a341c1ce24aea3e21a29

Download Submit
memory/380-0-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/380-1-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/380-2-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/380-3-0x0000000003150000-0x0000000003156000-memory.dmp

Filesize
24KB

Download
memory/380-18-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/1988-19-0x0000000003010000-0x0000000003016000-memory.dmp

Filesize
24KB

Download
memory/1988-25-0x0000000002D60000-0x0000000002D66000-memory.dmp

Filesize
24KB

Download
memory/1988-26-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download