4384613e70d6ad8ee66a6f8fd43a9d472da8be6192667a32768734386cd880ee

General

Target

2024-05-08_a1eb3195519ac45d22e51da957533674_cryptolocker.exe
Size

58KB
MD5

a1eb3195519ac45d22e51da957533674
SHA1

bd5c8f2e53ccd6ba42216c9666db8fca252ee800
SHA256

4384613e70d6ad8ee66a6f8fd43a9d472da8be6192667a32768734386cd880ee
SHA512

353653afc7d282b0dd1db0c937265658aaf86a8ceec50dee594710570ee7d835ac5db837305a920c060c58adc7470f9ab34a497e3bc94b77fb9b83bbf3146e59
SSDEEP

768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YMLam5axK3x:z6QFElP6n+gKmddpMOtEvwDpj9aYaQx

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/3012-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023255-13.dat	CryptoLocker_rule2
behavioral2/memory/1228-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3012-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1228-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/3012-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000023255-13.dat	CryptoLocker_set1
behavioral2/memory/1228-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3012-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1228-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/3012-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0008000000023255-13.dat	UPX
behavioral2/memory/1228-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3012-19-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1228-27-0x0000000000500000-0x0000000000510000-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	2024-05-08_a1eb3195519ac45d22e51da957533674_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1228	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3012-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0008000000023255-13.dat	upx
behavioral2/memory/1228-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3012-19-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1228-27-0x0000000000500000-0x0000000000510000-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 3012 wrote to memory of 1228	3012	2024-05-08_a1eb3195519ac45d22e51da957533674_cryptolocker.exe	90
PID 3012 wrote to memory of 1228	3012	2024-05-08_a1eb3195519ac45d22e51da957533674_cryptolocker.exe	90
PID 3012 wrote to memory of 1228	3012	2024-05-08_a1eb3195519ac45d22e51da957533674_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-05-08_a1eb3195519ac45d22e51da957533674_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-08_a1eb3195519ac45d22e51da957533674_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3012
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1228

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=1316 --field-trial-handle=2284,i,9807419199535700662,2319175108930815708,262144 --variations-seed-version /prefetch:8
1⤵
PID:2756

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
58KB

MD5
6dad0e8841ac311bbcacfcf0570d54d2

SHA1
64525a9e8ff5b82263793d921b1f1ca4d8189f61

SHA256
d030e1863bb1a0faf8a27dbb5f2477757760779a0ab7a8286e41d20bd7e4ac5d

SHA512
fd555955a16ec1cbf3ea47d1bf92489420d341e9292009def7e6742464bc4eabb1b7b00cacb6eb46c536547ba1df0d227e7f38d19405d9f2617a5e192566d796

Download Submit
memory/1228-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1228-26-0x0000000001FE0000-0x0000000001FE6000-memory.dmp

Filesize
24KB

Download
memory/1228-20-0x0000000002000000-0x0000000002006000-memory.dmp

Filesize
24KB

Download
memory/1228-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3012-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3012-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/3012-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/3012-3-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/3012-19-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download

Analysis

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