4ef851df3bc38602fc42c96232a1bbb31ea053c7511956305762586cef024148

General

Target

2024-05-22_20571b786e609af10f7f63484ff357e3_cryptolocker.exe
Size

39KB
MD5

20571b786e609af10f7f63484ff357e3
SHA1

ea3c13c893e46cf1a149b08c1762445c3c54410c
SHA256

4ef851df3bc38602fc42c96232a1bbb31ea053c7511956305762586cef024148
SHA512

38a21c34c3c38b2f1ff84ad71a607b618097745f94e84ce3350c56797425773569e7a39a716a569219bb3ac2faa2c001f805e459fb71dd8651e68dbc3e879310
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITY97:qDdFJy3QMOtEvwDpjjWMl7Tk

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4180-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/4592-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4180-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4592-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4180-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/4592-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4180-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4592-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4180-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/4592-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4180-19-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4592-28-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-22_20571b786e609af10f7f63484ff357e3_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation	2024-05-22_20571b786e609af10f7f63484ff357e3_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

4592 asih.exe

pid	process
4592	asih.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4180-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/4592-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4180-19-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4592-28-0x0000000000500000-0x0000000000510000-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 3 IoCs

Processes:

2024-05-22_20571b786e609af10f7f63484ff357e3_cryptolocker.exe

description	pid	process	target process
PID 4180 wrote to memory of 4592	4180	2024-05-22_20571b786e609af10f7f63484ff357e3_cryptolocker.exe	asih.exe
PID 4180 wrote to memory of 4592	4180	2024-05-22_20571b786e609af10f7f63484ff357e3_cryptolocker.exe	asih.exe
PID 4180 wrote to memory of 4592	4180	2024-05-22_20571b786e609af10f7f63484ff357e3_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_20571b786e609af10f7f63484ff357e3_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_20571b786e609af10f7f63484ff357e3_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4180
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4592

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=3804,i,1999448010053300448,1112699187621658374,262144 --variations-seed-version --mojo-platform-channel-handle=3404 /prefetch:8
1⤵
PID:2516

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
40KB

MD5
2178121d3b8f17b5b30bd71189f267af

SHA1
cbe3d451bfbbc36d03614466e3a11109b713fee9

SHA256
b0825c273e8f9c4f0cdd514f1a6509324b93aeb673200851b1d04d842282df19

SHA512
f12b57a5ee06add726438a87e2849fe9d6688bfb05b4542433e5e9a51ecd26cf93cd8999353ae3414e7033e954d6b8d12d4aefcd8528835014fbfc693bcc6959

Download Submit
memory/4180-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4180-1-0x0000000002140000-0x0000000002146000-memory.dmp

Filesize
24KB

Download
memory/4180-2-0x0000000002140000-0x0000000002146000-memory.dmp

Filesize
24KB

Download
memory/4180-3-0x0000000002040000-0x0000000002046000-memory.dmp

Filesize
24KB

Download
memory/4180-19-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4592-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4592-21-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4592-27-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4592-28-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads