7b2879e675064e8dd0c91ad43788f2adff47f1d621fbb734ba5cf1033ddb6cf1

Analysis

max time kernel
140s
max time network
161s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
28/03/2024, 09:43

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General

Target

2024-03-28_762a0f89409ec40d245daf8f0ffb4bff_cryptolocker.exe
Size

106KB
MD5

762a0f89409ec40d245daf8f0ffb4bff
SHA1

b6a15f5dd4dcd3e899858cdb4dab792c26c70caf
SHA256

7b2879e675064e8dd0c91ad43788f2adff47f1d621fbb734ba5cf1033ddb6cf1
SHA512

d79a27c67a37d36c005520886ca8b75e1bd38371e8a99845ee34c7cf975eb26adaccc263f6ff707edcef94c42f3c8614ca6e3c913b87621ee8180f646890fca2
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsalRn5iF1j6GksaLaC:1nK6a+qdOOtEvwDpjW

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2292-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0010000000023259-13.dat	CryptoLocker_rule2
behavioral2/memory/2292-20-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2704-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2292-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0010000000023259-13.dat	CryptoLocker_set1
behavioral2/memory/2292-20-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/2704-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2292-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x0010000000023259-13.dat	UPX
behavioral2/memory/2292-20-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/2704-26-0x0000000000500000-0x000000000050F311-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	2024-03-28_762a0f89409ec40d245daf8f0ffb4bff_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2704	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2292-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x0010000000023259-13.dat	upx
behavioral2/memory/2292-20-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/2704-26-0x0000000000500000-0x000000000050F311-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 2292 wrote to memory of 2704	2292	2024-03-28_762a0f89409ec40d245daf8f0ffb4bff_cryptolocker.exe	96
PID 2292 wrote to memory of 2704	2292	2024-03-28_762a0f89409ec40d245daf8f0ffb4bff_cryptolocker.exe	96
PID 2292 wrote to memory of 2704	2292	2024-03-28_762a0f89409ec40d245daf8f0ffb4bff_cryptolocker.exe	96

C:\Users\Admin\AppData\Local\Temp\2024-03-28_762a0f89409ec40d245daf8f0ffb4bff_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-28_762a0f89409ec40d245daf8f0ffb4bff_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2292
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2704

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=3828 --field-trial-handle=2292,i,2103142837140538807,15881446839139365070,262144 --variations-seed-version /prefetch:8
1⤵
PID:732

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

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
106KB

MD5
e3c9272603da5c048448c0a31ae7a35c

SHA1
906faa2846a5912bc463bd3832e2319f36e36ef6

SHA256
719afa9cabba933473ed55779880065abb9a495aa2822505501b7de3b900fa02

SHA512
a8200bbca471c4cda14796ae182cdbef468ca75abf8e64ee3cb08e78fab0e8b62db8df8a881efa05c206826114a13d4b4137a53957a6f9f3767c7b788f30d79f

Download Submit
memory/2292-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2292-1-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/2292-2-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/2292-3-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/2292-20-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2704-18-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/2704-19-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/2704-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download