fb0f285282cd08c2f6980612f283b1e99efe5701bffe239980b5b576f45f5668

General

Target

2024-05-10_7e6d5f49f6bab493253ade002c80aad4_cryptolocker.exe
Size

52KB
MD5

7e6d5f49f6bab493253ade002c80aad4
SHA1

9d8509df6466924483bda01936510b9d269eab15
SHA256

fb0f285282cd08c2f6980612f283b1e99efe5701bffe239980b5b576f45f5668
SHA512

47dd73455ad64460e61d8be1fecdc271594b02c3538c40ec7ea31226d4c764d54747d683085c50ce1668aafdde3a6425c1cdbc154af1cbc85cb548b91a265294
SSDEEP

768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YY1J+OTOp5:z6QFElP6n+gKmddpMOtEvwDpj31ip5

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/1768-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023552-13.dat	CryptoLocker_rule2
behavioral2/memory/5012-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1768-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/5012-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/1768-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000023552-13.dat	CryptoLocker_set1
behavioral2/memory/5012-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1768-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/5012-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/1768-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0008000000023552-13.dat	UPX
behavioral2/memory/5012-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1768-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/5012-27-0x0000000000500000-0x0000000000510000-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-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation	2024-05-10_7e6d5f49f6bab493253ade002c80aad4_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
5012	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1768-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0008000000023552-13.dat	upx
behavioral2/memory/5012-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1768-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/5012-27-0x0000000000500000-0x0000000000510000-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 1768 wrote to memory of 5012	1768	2024-05-10_7e6d5f49f6bab493253ade002c80aad4_cryptolocker.exe	89
PID 1768 wrote to memory of 5012	1768	2024-05-10_7e6d5f49f6bab493253ade002c80aad4_cryptolocker.exe	89
PID 1768 wrote to memory of 5012	1768	2024-05-10_7e6d5f49f6bab493253ade002c80aad4_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-05-10_7e6d5f49f6bab493253ade002c80aad4_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-10_7e6d5f49f6bab493253ade002c80aad4_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1768
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:5012

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 --field-trial-handle=4356,i,5047420736443372512,9747851268033796534,262144 --variations-seed-version --mojo-platform-channel-handle=4292 /prefetch:8
1⤵
PID:5016

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
52KB

MD5
0d8a44ecf3a27ecf20fd613adf5059b1

SHA1
91f0c85aef3a494940fa2b1f0c0238a21229cec2

SHA256
18261538ccdaf81bf16aaef257ed1ea675282567a7e12470ca7d3fd025fa9452

SHA512
e972a30633d36c187ddf0dff54aff58bfe1052a4e80e8de754ea5e902d129f8a3e31a8fdb352dbd6b6e00b14583b06403dc3332e02c42efacd692d9a0fb64648

Download Submit
memory/1768-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1768-1-0x00000000021C0000-0x00000000021C6000-memory.dmp

Filesize
24KB

Download
memory/1768-2-0x00000000020D0000-0x00000000020D6000-memory.dmp

Filesize
24KB

Download
memory/1768-9-0x00000000021C0000-0x00000000021C6000-memory.dmp

Filesize
24KB

Download
memory/1768-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/5012-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/5012-20-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/5012-21-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/5012-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download

Analysis

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