8d8db10f6abeb6e7cb00a37dbfee83a14c81313552477ca78de1928f378b531f

Analysis

max time kernel
145s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
27-04-2024 22:23

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General

Target

2024-04-27_0e3d13aaff3ef7d0ee038ace59ff4bcc_cryptolocker.exe
Size

38KB
MD5

0e3d13aaff3ef7d0ee038ace59ff4bcc
SHA1

e519ae91ff709b390fbe97dce870f9d5139bfcd3
SHA256

8d8db10f6abeb6e7cb00a37dbfee83a14c81313552477ca78de1928f378b531f
SHA512

2ebb62fbbfaf4249164c37a09f83df89a197462f48a44ce8d3136d335d8eadc281782930a0348925f35c17b54a87cd91239fd0da54cb4d3f863041baba6acf4e
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITY8:qDdFJy3QMOtEvwDpjjWMl7TZ

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/372-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/372-14-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3496-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/372-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/372-14-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3496-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/372-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/372-14-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3496-27-0x0000000000500000-0x0000000000510000-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

Processes:

2024-04-27_0e3d13aaff3ef7d0ee038ace59ff4bcc_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-04-27_0e3d13aaff3ef7d0ee038ace59ff4bcc_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

3496 asih.exe

pid	process
3496	asih.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/372-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/372-14-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3496-27-0x0000000000500000-0x0000000000510000-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

Processes:

2024-04-27_0e3d13aaff3ef7d0ee038ace59ff4bcc_cryptolocker.exe

description	pid	process	target process
PID 372 wrote to memory of 3496	372	2024-04-27_0e3d13aaff3ef7d0ee038ace59ff4bcc_cryptolocker.exe	asih.exe
PID 372 wrote to memory of 3496	372	2024-04-27_0e3d13aaff3ef7d0ee038ace59ff4bcc_cryptolocker.exe	asih.exe
PID 372 wrote to memory of 3496	372	2024-04-27_0e3d13aaff3ef7d0ee038ace59ff4bcc_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-27_0e3d13aaff3ef7d0ee038ace59ff4bcc_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-27_0e3d13aaff3ef7d0ee038ace59ff4bcc_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:372

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:3496

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=4256 --field-trial-handle=2252,i,16022092570067181109,3235558581947505669,262144 --variations-seed-version /prefetch:8
1⤵
PID:4252

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe
Filesize
38KB

MD5
19b0ddead3ff3d81ef7050d446500d61

SHA1
357d25331de12247a4d95fb415a34a59d1952bfb

SHA256
4d101edb5cd29497cfc9df7c6ec12c04107d16fbdbc736bebd862ab04a9c1a6a

SHA512
08ffc4b18bf650b519f406e9405a543618f5e5a450e531c40f5a27242de95981957d079bb46aec62beef7627bdf0199aa8d9a13459c0ef105991c22f71dd5ccd

Download Submit
memory/372-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/372-1-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/372-2-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/372-3-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/372-14-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3496-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3496-26-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3496-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download