9589acb43837d64790b1498dace36cb1c548af0cc89ddd483ccd803f3b6cc4cb

General

Target

2024-06-14_8165bc49e68efebc75f25764d4890274_cryptolocker.exe
Size

40KB
MD5

8165bc49e68efebc75f25764d4890274
SHA1

d26da10a63990c6a7b2d06f7d5a84686d1143f12
SHA256

9589acb43837d64790b1498dace36cb1c548af0cc89ddd483ccd803f3b6cc4cb
SHA512

bb4aadc475112d0f24bac88d2f031b5a36ad0ad03d39c611a3899194d54f4f7f964f9020e64d468543ba1e5fc1efdd73b2d8e938dcbde34156e4f50721436bca
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYlO:qDdFJy3QMOtEvwDpjjWMl7T6O

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/3304-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3304-1-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3304-13-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000800000002324f-15.dat	CryptoLocker_rule2
behavioral2/memory/2520-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/3304-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3304-1-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3304-13-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000800000002324f-15.dat	CryptoLocker_set1
behavioral2/memory/2520-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/3304-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3304-1-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3304-13-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000800000002324f-15.dat	UPX
behavioral2/memory/2520-28-0x0000000000500000-0x0000000000510000-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	2024-06-14_8165bc49e68efebc75f25764d4890274_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2520	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3304-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3304-1-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3304-13-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000800000002324f-15.dat	upx
behavioral2/memory/2520-28-0x0000000000500000-0x0000000000510000-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 3304 wrote to memory of 2520	3304	2024-06-14_8165bc49e68efebc75f25764d4890274_cryptolocker.exe	92
PID 3304 wrote to memory of 2520	3304	2024-06-14_8165bc49e68efebc75f25764d4890274_cryptolocker.exe	92
PID 3304 wrote to memory of 2520	3304	2024-06-14_8165bc49e68efebc75f25764d4890274_cryptolocker.exe	92

C:\Users\Admin\AppData\Local\Temp\2024-06-14_8165bc49e68efebc75f25764d4890274_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-14_8165bc49e68efebc75f25764d4890274_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3304
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2520

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=3696 --field-trial-handle=3192,i,2785050981002401924,4037047756083432660,262144 --variations-seed-version /prefetch:8
1⤵
PID:3232

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

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
3cb7d70c838f528c80af4f360b0e6be0

SHA1
c8ffc529b987f2bde988f66050928643a57cd596

SHA256
749df8bd218748e8cb31f4f14450de3907085dfa12e9c4fb0f1267705a524deb

SHA512
868cd02655a96722589beef7df90ab945e014732dd30eb647402c399043792d0264cbafe7faf1185aace25cd09d90839c7ec50c19d4d69ff904e97f4d9900164

Download Submit
memory/2520-20-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/2520-21-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/2520-28-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3304-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3304-1-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3304-2-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/3304-3-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/3304-4-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/3304-13-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download

Analysis

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