b681eab0670237f987c8fa198666d559575243d2d4b1a95cc1e141c80f9a4e7c

Analysis

max time kernel
149s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
26/01/2024, 01:46

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General

Target

2024-01-26_9e97e96963f2536c7f1d11e61b13ba07_cryptolocker.exe
Size

85KB
MD5

9e97e96963f2536c7f1d11e61b13ba07
SHA1

a2d8975ed4e5f61918fc1b6e5a7bbda3606cf0f6
SHA256

b681eab0670237f987c8fa198666d559575243d2d4b1a95cc1e141c80f9a4e7c
SHA512

1959824482dc9cb8668b231dbe7c97ed4c05c184aee97386b56fbe697d4809a02c94d7bf2ef660f576862be988a68c340f737f9e016ef9a28e92e2728d6c58ec
SSDEEP

768:qkmnjFom/kLyMro2GtOOtEvwDpjeY10Y/YMsvlMdwPK80GQuchoIgtISh:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgn

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3008-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000700000002313b-13.dat	CryptoLocker_rule2
behavioral2/memory/3008-21-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1996-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3008-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000700000002313b-13.dat	CryptoLocker_set1
behavioral2/memory/3008-21-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1996-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3008-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x000700000002313b-13.dat	UPX
behavioral2/memory/3008-21-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/1996-26-0x0000000000500000-0x000000000050F000-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-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	2024-01-26_9e97e96963f2536c7f1d11e61b13ba07_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1996	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3008-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x000700000002313b-13.dat	upx
behavioral2/memory/3008-21-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/1996-26-0x0000000000500000-0x000000000050F000-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 3008 wrote to memory of 1996	3008	2024-01-26_9e97e96963f2536c7f1d11e61b13ba07_cryptolocker.exe	89
PID 3008 wrote to memory of 1996	3008	2024-01-26_9e97e96963f2536c7f1d11e61b13ba07_cryptolocker.exe	89
PID 3008 wrote to memory of 1996	3008	2024-01-26_9e97e96963f2536c7f1d11e61b13ba07_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-01-26_9e97e96963f2536c7f1d11e61b13ba07_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-26_9e97e96963f2536c7f1d11e61b13ba07_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3008
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1996

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
85KB

MD5
15b13aa00af78fdb0b91000835b2251e

SHA1
1f3da36af0177cc51a3094eb81c4a523a1896340

SHA256
a90cee968768dfcd3e04f21523b22827d6e49a19818c09872eb25b7f29fa0b25

SHA512
6fb77bad8965a730e0d1644729208d16a6ae773b79489a2bf2eb46078c80752d09b7008b6da5502c460172052663e9ccf42ea43d94d5f265f8e81d9f4adb29be

Download Submit
memory/1996-18-0x0000000000760000-0x0000000000766000-memory.dmp

Filesize
24KB

Download
memory/1996-20-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/1996-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3008-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3008-1-0x0000000000560000-0x0000000000566000-memory.dmp

Filesize
24KB

Download
memory/3008-2-0x0000000000560000-0x0000000000566000-memory.dmp

Filesize
24KB

Download
memory/3008-3-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/3008-21-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download