a368077a7e78e2f6cf3fa94e12c3bf1b6c82af0591af74fb574096bda9ede5f8

General

Target

2024-05-21_c9a806ce5baa9df5b534b6386d68d3ac_cryptolocker.exe
Size

90KB
MD5

c9a806ce5baa9df5b534b6386d68d3ac
SHA1

321cd998284c7abccbd437de125fb2aa1504d6a7
SHA256

a368077a7e78e2f6cf3fa94e12c3bf1b6c82af0591af74fb574096bda9ede5f8
SHA512

e0950ef3f98df12e8c1bda95eb1479846a7d84e8f6a99e4a3f3651c3e05ac157aec80d4751308c83df8b7c20a3aaf218ff9cd0d8146ee4e17a158eb674f0245d
SSDEEP

1536:n6QFElP6n+g9u9cvMOtEvwDpjYYTjipvF2bx1PQAA/u:n6a+1SEOtEvwDpjYYvQd2Pl

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/744-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/988-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/744-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/988-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/744-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/988-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/744-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/988-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/744-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/988-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/744-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/988-27-0x0000000000500000-0x0000000000510000-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:

2024-05-21_c9a806ce5baa9df5b534b6386d68d3ac_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_c9a806ce5baa9df5b534b6386d68d3ac_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

988 asih.exe

pid	process
988	asih.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/744-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/988-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/744-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/988-27-0x0000000000500000-0x0000000000510000-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:

2024-05-21_c9a806ce5baa9df5b534b6386d68d3ac_cryptolocker.exe

description	pid	process	target process
PID 744 wrote to memory of 988	744	2024-05-21_c9a806ce5baa9df5b534b6386d68d3ac_cryptolocker.exe	asih.exe
PID 744 wrote to memory of 988	744	2024-05-21_c9a806ce5baa9df5b534b6386d68d3ac_cryptolocker.exe	asih.exe
PID 744 wrote to memory of 988	744	2024-05-21_c9a806ce5baa9df5b534b6386d68d3ac_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-21_c9a806ce5baa9df5b534b6386d68d3ac_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_c9a806ce5baa9df5b534b6386d68d3ac_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:744

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:988

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=4080,i,5711962389779687290,1245653010537220991,262144 --variations-seed-version --mojo-platform-channel-handle=4208 /prefetch:8
1⤵
PID:2724

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe
Filesize
90KB

MD5
dacbcde30fcc094532609fbe09091182

SHA1
fe8d7844aa935310f05d966dbb5a8460a7dc994a

SHA256
6a9483a6b25835a7babe64c9c602bca30fcd7d72ca11fceaa9b36b856d44023d

SHA512
65e8a6ed3f8666b641376ea8b62f65c6e34f06a304a9ecbbd451dc7057658fc1895e25efabd2e30c8c20e7864136b45c52482bac552932741754cf3267c00d4e

Download Submit
memory/744-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/744-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/744-2-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/744-9-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/744-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/988-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/988-20-0x0000000000760000-0x0000000000766000-memory.dmp

Filesize
24KB

Download
memory/988-26-0x0000000000730000-0x0000000000736000-memory.dmp

Filesize
24KB

Download
memory/988-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads