b72d6e73c8348dc1e997781e5034893f5332145cd2c4fdfb99554279ea3c2bbe

Analysis

max time kernel
149s
max time network
153s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
28/01/2024, 08:25

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General

Target

2024-01-28_20a59c8f9e39e7ce168ba514c6d0fc45_cryptolocker.exe
Size

96KB
MD5

20a59c8f9e39e7ce168ba514c6d0fc45
SHA1

d32b64350bd689f91cd322a371fb71863e2c7919
SHA256

b72d6e73c8348dc1e997781e5034893f5332145cd2c4fdfb99554279ea3c2bbe
SHA512

4d70d88d1d2877e934cd6b2537f5fbe1e5884918b64c59504a90918366ceb3fb04d8e295fe0f7596973b12506187e8eb3fcf5e2e13e3c0a84860689a66242ed5
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj3GYQbbr/BKW:z6a+CdOOtEvwDpjcX

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2248-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000c00000001225f-11.dat	CryptoLocker_rule2
behavioral1/memory/2248-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1796-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1796-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/2248-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000c00000001225f-11.dat	CryptoLocker_set1
behavioral1/memory/2248-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1796-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1796-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2248-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000c00000001225f-11.dat	UPX
behavioral1/memory/2248-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/1796-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/1796-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
1796	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2248	2024-01-28_20a59c8f9e39e7ce168ba514c6d0fc45_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2248-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000c00000001225f-11.dat	upx
behavioral1/memory/2248-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/1796-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/1796-26-0x0000000000500000-0x0000000000510000-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

description	pid	Process	procid_target
PID 2248 wrote to memory of 1796	2248	2024-01-28_20a59c8f9e39e7ce168ba514c6d0fc45_cryptolocker.exe	28
PID 2248 wrote to memory of 1796	2248	2024-01-28_20a59c8f9e39e7ce168ba514c6d0fc45_cryptolocker.exe	28
PID 2248 wrote to memory of 1796	2248	2024-01-28_20a59c8f9e39e7ce168ba514c6d0fc45_cryptolocker.exe	28
PID 2248 wrote to memory of 1796	2248	2024-01-28_20a59c8f9e39e7ce168ba514c6d0fc45_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-01-28_20a59c8f9e39e7ce168ba514c6d0fc45_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-28_20a59c8f9e39e7ce168ba514c6d0fc45_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2248
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1796

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
96KB

MD5
e60b534f68a94bf1bdb649b52909ab02

SHA1
2f0b8c42587399657e5e99772b4e11652bfb3787

SHA256
ea4282518b326d6f6fa9c79590a7b28cab948181f340d5938d4f7335c4a73605

SHA512
742466638c22ee4a1e3ba3f18e3d76ff3c5bf7f051a5cf2efb4b1ff11d1da7c36355635880b14b38c9b904e2d6c9c89efbe908f04c5e6ed54f2769c63382a167

Download Submit
memory/1796-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1796-18-0x0000000000510000-0x0000000000516000-memory.dmp

Filesize
24KB

Download
memory/1796-25-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/1796-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2248-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2248-1-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2248-3-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2248-2-0x0000000000470000-0x0000000000476000-memory.dmp

Filesize
24KB

Download
memory/2248-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download