b7c4f61681a128c3440bbdb20c507c198968f027c70c6d3843bcf951a2aa6e70

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
13/02/2024, 16:44

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General

Target

2024-02-13_5865600efc0bbf077c76db28d2f9d69f_cryptolocker.exe
Size

86KB
MD5

5865600efc0bbf077c76db28d2f9d69f
SHA1

af311ef9eaef4730e03763a1267ee3fc5cd6ab37
SHA256

b7c4f61681a128c3440bbdb20c507c198968f027c70c6d3843bcf951a2aa6e70
SHA512

9208cfce45a1fc95e76b791e45652413edca63ecc2fc90e43fdabb2047b69b76d440ca7f4b06a71259260e28dfd95640d5a14c94d5ee06e1f34d9d7e6476b47d
SSDEEP

768:qkmnjFom/kLyMro2GtOOtEvwDpjeY10Y/YMsvlMdwPK80GQuchoIgtISGt:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgK

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3988-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00080000000231f7-13.dat	CryptoLocker_rule2
behavioral2/memory/3988-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/760-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3988-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00080000000231f7-13.dat	CryptoLocker_set1
behavioral2/memory/3988-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/760-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3988-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x00080000000231f7-13.dat	UPX
behavioral2/memory/3988-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/760-26-0x0000000000500000-0x000000000050F000-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1168293393-3419776239-306423207-1000\Control Panel\International\Geo\Nation	2024-02-13_5865600efc0bbf077c76db28d2f9d69f_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
760	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3988-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x00080000000231f7-13.dat	upx
behavioral2/memory/3988-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/760-26-0x0000000000500000-0x000000000050F000-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

description	pid	Process	procid_target
PID 3988 wrote to memory of 760	3988	2024-02-13_5865600efc0bbf077c76db28d2f9d69f_cryptolocker.exe	83
PID 3988 wrote to memory of 760	3988	2024-02-13_5865600efc0bbf077c76db28d2f9d69f_cryptolocker.exe	83
PID 3988 wrote to memory of 760	3988	2024-02-13_5865600efc0bbf077c76db28d2f9d69f_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-02-13_5865600efc0bbf077c76db28d2f9d69f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-13_5865600efc0bbf077c76db28d2f9d69f_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3988
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:760

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
86KB

MD5
48f9140ff3d272df72f82ae037ff66f6

SHA1
646f8f1c2c993f7e38c84a882c4817d663292a87

SHA256
b41fee757dd9b3c14659b06f37c1539de8904ed89688d7260b98200dfde3a817

SHA512
ff97206b173e05df6aae1415e466f94c7e5fbbaed792804f06199abe1e581d7bc2b3eb84a2b5378c9d8fd50d45638e5b0f22d52e68db13bfdfaa74d5ca966072

Download Submit
memory/760-19-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/760-21-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/760-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3988-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3988-1-0x0000000002310000-0x0000000002316000-memory.dmp

Filesize
24KB

Download
memory/3988-2-0x0000000002310000-0x0000000002316000-memory.dmp

Filesize
24KB

Download
memory/3988-3-0x00000000021B0000-0x00000000021B6000-memory.dmp

Filesize
24KB

Download
memory/3988-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download