a85435407c14de447db3a39040332eb53e98b4cfc6b00d9930599dab639dc0a5

Analysis

max time kernel
148s
max time network
149s
platform
windows7_x64
resource
win7-20240215-en
resource tags

arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system
submitted
19/03/2024, 11:02

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General

Target

2024-03-19_9a7a40a9732eb9cc131ccab75c090774_cryptolocker.exe
Size

57KB
MD5

9a7a40a9732eb9cc131ccab75c090774
SHA1

43e3db31fdd26365fff117656061956f024f9f2a
SHA256

a85435407c14de447db3a39040332eb53e98b4cfc6b00d9930599dab639dc0a5
SHA512

85259198010545ea6742dcf54dfaf36531820fcc01d186c8abfc9dacb113ae801e398b8e068db8e670cf0ccbe35269e6d5ed5a3d640161d319c884c4145af876
SSDEEP

768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YMLam5ax8iHS:z6QFElP6n+gKmddpMOtEvwDpj9aYa9S

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral1/memory/2204-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000c000000012320-11.dat	CryptoLocker_rule2
behavioral1/memory/2204-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2540-20-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral1/memory/2204-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000c000000012320-11.dat	CryptoLocker_set1
behavioral1/memory/2204-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2540-20-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral1/memory/2204-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000c000000012320-11.dat	UPX
behavioral1/memory/2204-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2540-20-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2540	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2204	2024-03-19_9a7a40a9732eb9cc131ccab75c090774_cryptolocker.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2204-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000c000000012320-11.dat	upx
behavioral1/memory/2204-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2540-20-0x0000000000500000-0x0000000000510000-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 4 IoCs

description	pid	Process	procid_target
PID 2204 wrote to memory of 2540	2204	2024-03-19_9a7a40a9732eb9cc131ccab75c090774_cryptolocker.exe	28
PID 2204 wrote to memory of 2540	2204	2024-03-19_9a7a40a9732eb9cc131ccab75c090774_cryptolocker.exe	28
PID 2204 wrote to memory of 2540	2204	2024-03-19_9a7a40a9732eb9cc131ccab75c090774_cryptolocker.exe	28
PID 2204 wrote to memory of 2540	2204	2024-03-19_9a7a40a9732eb9cc131ccab75c090774_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-03-19_9a7a40a9732eb9cc131ccab75c090774_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-19_9a7a40a9732eb9cc131ccab75c090774_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2204
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2540

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
57KB

MD5
79c224241689f0dcb55d9e72305819d8

SHA1
e6fc3cb28d9103b310a2f3149f9257aa8e38785a

SHA256
ce5a2775dbea632eea86bce34c7ef740feeec71824b415d8dcec46afaa368cc1

SHA512
c82ff6269e3e481a1615290743770f36d2ceff7893590d4a915dbc0c765975b93763e21e1a50a23e0e1a3621a4b2a84d004fa41decd6c0b01719098a38e23554

Download Submit
memory/2204-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2204-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2204-2-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2204-4-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2204-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2540-18-0x0000000000300000-0x0000000000306000-memory.dmp

Filesize
24KB

Download
memory/2540-17-0x00000000004A0000-0x00000000004A6000-memory.dmp

Filesize
24KB

Download
memory/2540-20-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download