9406361feac84c30660cebab20a043f14f35d8850fb147c3661f05d768f47f86

General

Target

2024-05-21_8ce984931e7724f99f2493f541586f28_cryptolocker.exe
Size

89KB
MD5

8ce984931e7724f99f2493f541586f28
SHA1

34984bbe535c18a06b9f837134089751ef165eab
SHA256

9406361feac84c30660cebab20a043f14f35d8850fb147c3661f05d768f47f86
SHA512

9766a9a0af058a0d8db2ea564312a6662584b6a5a7d31351ca04ea1550ad6927264a223301165e4bce74e145e0a9086d71aacb0d72bc2177be092e91bd1e2933
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgIiW:AnBdOOtEvwDpj6zk

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1528-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/3956-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1528-19-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3956-28-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1528-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/3956-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1528-19-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3956-28-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1528-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/3956-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/1528-19-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/3956-28-0x0000000000500000-0x000000000050F000-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:

2024-05-21_8ce984931e7724f99f2493f541586f28_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation	2024-05-21_8ce984931e7724f99f2493f541586f28_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

3956 asih.exe

pid	process
3956	asih.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/1528-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/3956-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/1528-19-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/3956-28-0x0000000000500000-0x000000000050F000-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:

2024-05-21_8ce984931e7724f99f2493f541586f28_cryptolocker.exe

description	pid	process	target process
PID 1528 wrote to memory of 3956	1528	2024-05-21_8ce984931e7724f99f2493f541586f28_cryptolocker.exe	asih.exe
PID 1528 wrote to memory of 3956	1528	2024-05-21_8ce984931e7724f99f2493f541586f28_cryptolocker.exe	asih.exe
PID 1528 wrote to memory of 3956	1528	2024-05-21_8ce984931e7724f99f2493f541586f28_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-21_8ce984931e7724f99f2493f541586f28_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_8ce984931e7724f99f2493f541586f28_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1528

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:3956

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=996,i,1809100026287847100,9768898026582633513,262144 --variations-seed-version --mojo-platform-channel-handle=1276 /prefetch:8
1⤵
PID:2668

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
90KB

MD5
921327eef4ea578bd0e1acf9c4c3304c

SHA1
1f8b192cdf674172cd1343577127bfd66266a2ac

SHA256
aa1ac3d5c6bcbb33b244f1b794f64b08405c5caf65c6f029dd7dfede01449ec0

SHA512
7e29d810ed68aa6e5f3a527c6689ec349bc7dfceb0edb06c4cb49e074e8b988b70b34cf586ea678737b9239d32cdb84922590f2323dbf50df6aea3e2feec7035

Download Submit
memory/1528-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1528-1-0x00000000020E0000-0x00000000020E6000-memory.dmp

Filesize
24KB

Download
memory/1528-2-0x0000000002100000-0x0000000002106000-memory.dmp

Filesize
24KB

Download
memory/1528-9-0x00000000020E0000-0x00000000020E6000-memory.dmp

Filesize
24KB

Download
memory/1528-19-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3956-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3956-21-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3956-27-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3956-28-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads