7fd8c3bba179d1dc682b6f4e875cf075e95077ff598964719037c453cf1c7774

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
03/02/2024, 13:38

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General

Target

2024-02-03_efaf90759b1c085bbd3a7038e4c02107_cryptolocker.exe
Size

62KB
MD5

efaf90759b1c085bbd3a7038e4c02107
SHA1

fc97fae602cbbd1af67ca43c563ada2254e40e3a
SHA256

7fd8c3bba179d1dc682b6f4e875cf075e95077ff598964719037c453cf1c7774
SHA512

909c3c093a110235e160fc0bd29c8d6c76c57f64ce4f15b2e9c06b592773c159bb0ca7aae2c941a4288efee3c00c6b3471f46aa9c2ab616bcc8664e3d2da0db2
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjYibAo7:1nK6a+qdOOtEvwDpjF

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2208-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x001000000002315e-13.dat	CryptoLocker_rule2
behavioral2/memory/2208-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1616-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2208-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x001000000002315e-13.dat	CryptoLocker_set1
behavioral2/memory/2208-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/1616-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2208-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x001000000002315e-13.dat	UPX
behavioral2/memory/2208-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/1616-26-0x0000000000500000-0x000000000050F311-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-1-5-21-1232405761-1209240240-3206092754-1000\Control Panel\International\Geo\Nation	2024-02-03_efaf90759b1c085bbd3a7038e4c02107_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1616	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2208-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x001000000002315e-13.dat	upx
behavioral2/memory/2208-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/1616-26-0x0000000000500000-0x000000000050F311-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 2208 wrote to memory of 1616	2208	2024-02-03_efaf90759b1c085bbd3a7038e4c02107_cryptolocker.exe	85
PID 2208 wrote to memory of 1616	2208	2024-02-03_efaf90759b1c085bbd3a7038e4c02107_cryptolocker.exe	85
PID 2208 wrote to memory of 1616	2208	2024-02-03_efaf90759b1c085bbd3a7038e4c02107_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-02-03_efaf90759b1c085bbd3a7038e4c02107_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-03_efaf90759b1c085bbd3a7038e4c02107_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2208
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1616

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
62KB

MD5
ddc01017a790fad91f828dfb7f1a43c0

SHA1
3ca7a8cb8a176e1f567740fbc7e13c88d222bcc9

SHA256
c49fca1603b083698be5d639ad2dc48bd04d504c780cb443ce187eb0144881d1

SHA512
1c3d7e35f67f19859cbe305baf94aec556f027d06a268cd84e7b77720ec178334c3e1b3fa63970fcc5bd45da18fea5ac3c765a21a5f07e983b89e5cdddabe063

Download Submit
memory/1616-19-0x0000000000670000-0x0000000000676000-memory.dmp

Filesize
24KB

Download
memory/1616-24-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1616-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2208-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2208-1-0x0000000000530000-0x0000000000536000-memory.dmp

Filesize
24KB

Download
memory/2208-2-0x0000000000530000-0x0000000000536000-memory.dmp

Filesize
24KB

Download
memory/2208-3-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/2208-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download