8d8db10f6abeb6e7cb00a37dbfee83a14c81313552477ca78de1928f378b531f

Analysis

max time kernel
148s
max time network
149s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
27-04-2024 22:23

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General

Target

2024-04-27_0e3d13aaff3ef7d0ee038ace59ff4bcc_cryptolocker.exe
Size

38KB
MD5

0e3d13aaff3ef7d0ee038ace59ff4bcc
SHA1

e519ae91ff709b390fbe97dce870f9d5139bfcd3
SHA256

8d8db10f6abeb6e7cb00a37dbfee83a14c81313552477ca78de1928f378b531f
SHA512

2ebb62fbbfaf4249164c37a09f83df89a197462f48a44ce8d3136d335d8eadc281782930a0348925f35c17b54a87cd91239fd0da54cb4d3f863041baba6acf4e
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITY8:qDdFJy3QMOtEvwDpjjWMl7TZ

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2064-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/2064-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2680-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2064-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/2064-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2680-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2064-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/2064-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2680-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2680 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-04-27_0e3d13aaff3ef7d0ee038ace59ff4bcc_cryptolocker.exe

pid process

2064 2024-04-27_0e3d13aaff3ef7d0ee038ace59ff4bcc_cryptolocker.exe

pid	process
2680	asih.exe

pid	process
2064	2024-04-27_0e3d13aaff3ef7d0ee038ace59ff4bcc_cryptolocker.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2064-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/2064-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2680-26-0x0000000000500000-0x0000000000510000-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

Processes:

2024-04-27_0e3d13aaff3ef7d0ee038ace59ff4bcc_cryptolocker.exe

description	pid	process	target process
PID 2064 wrote to memory of 2680	2064	2024-04-27_0e3d13aaff3ef7d0ee038ace59ff4bcc_cryptolocker.exe	asih.exe
PID 2064 wrote to memory of 2680	2064	2024-04-27_0e3d13aaff3ef7d0ee038ace59ff4bcc_cryptolocker.exe	asih.exe
PID 2064 wrote to memory of 2680	2064	2024-04-27_0e3d13aaff3ef7d0ee038ace59ff4bcc_cryptolocker.exe	asih.exe
PID 2064 wrote to memory of 2680	2064	2024-04-27_0e3d13aaff3ef7d0ee038ace59ff4bcc_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-27_0e3d13aaff3ef7d0ee038ace59ff4bcc_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-27_0e3d13aaff3ef7d0ee038ace59ff4bcc_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2064

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2680

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\asih.exe
Filesize
38KB

MD5
19b0ddead3ff3d81ef7050d446500d61

SHA1
357d25331de12247a4d95fb415a34a59d1952bfb

SHA256
4d101edb5cd29497cfc9df7c6ec12c04107d16fbdbc736bebd862ab04a9c1a6a

SHA512
08ffc4b18bf650b519f406e9405a543618f5e5a450e531c40f5a27242de95981957d079bb46aec62beef7627bdf0199aa8d9a13459c0ef105991c22f71dd5ccd

Download Submit
memory/2064-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2064-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2064-9-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2064-2-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2064-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2680-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2680-25-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2680-18-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download