eece98865bb0903c7473c7ae1749f31c8144214b281a9a6ee3f9fd4a4cd5dfb1

Analysis

max time kernel
141s
max time network
17s
platform
windows7_x64
resource
win7-20240705-en
resource tags

arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system
submitted
18-08-2024 17:32

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General

Target

pdfstamp.exe
Size

1.3MB
MD5

9737f4badfc7733593a888d33e1b3054
SHA1

0de4d607f97d620447661b32b6ef1aefd0f69618
SHA256

99eb6167fc4160e7a8b81d13c3e6c1d2b65d1ed306ae36209ca354286ee6b1fd
SHA512

a9d6392ee2523534de73e1d291b335fca12cdc452c61426412fa937481296050bb13b9293927739d3a3183a157511ea5f7f78e62157d375c4a8adaa1287d411d
SSDEEP

24576:7I39d3dKcN6Cw7T0oM8Kjb0qKSZRAGStta2uO93cVTvTUuDhgebVKo0Ld8:76dtKcN5wkoAX8vL9MtrFVbv4e

Score

7^/10

discovery

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
2744	is-9UBF0.tmp

Loads dropped DLL 3 IoCs

pid	Process
1740	pdfstamp.exe
2744	is-9UBF0.tmp
2744	is-9UBF0.tmp

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	pdfstamp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	is-9UBF0.tmp

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2744	is-9UBF0.tmp

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1740 wrote to memory of 2744	1740	pdfstamp.exe	30
PID 1740 wrote to memory of 2744	1740	pdfstamp.exe	30
PID 1740 wrote to memory of 2744	1740	pdfstamp.exe	30
PID 1740 wrote to memory of 2744	1740	pdfstamp.exe	30
PID 1740 wrote to memory of 2744	1740	pdfstamp.exe	30
PID 1740 wrote to memory of 2744	1740	pdfstamp.exe	30
PID 1740 wrote to memory of 2744	1740	pdfstamp.exe	30

C:\Users\Admin\AppData\Local\Temp\pdfstamp.exe
"C:\Users\Admin\AppData\Local\Temp\pdfstamp.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1740
- C:\Users\Admin\AppData\Local\Temp\is-AMS17.tmp\is-9UBF0.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-AMS17.tmp\is-9UBF0.tmp" /SL4 $30150 "C:\Users\Admin\AppData\Local\Temp\pdfstamp.exe" 1083843 52224
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: GetForegroundWindowSpam
  PID:2744

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\is-AMS17.tmp\is-9UBF0.tmp

Filesize
647KB

MD5
b683339ce008e97a0243a0f83bca1e09

SHA1
a8a4c078225ec9d94912762bda3a745d83dbe8f4

SHA256
5c6b8a1ab73cd03140040a3093e0d8466c666cd3fe17e8660dbc1a30d0b6f925

SHA512
c39b2501f5887c363633c94b04d58396a0d285ff65963ed513e99ff2dd7f36da323904278c6a64b9f1f637aaeed17e3d9d40540baa9805369cc664a32c62c780

Download Submit
\Users\Admin\AppData\Local\Temp\is-SA5DK.tmp\_isetup\_shfoldr.dll

Filesize
22KB

MD5
92dc6ef532fbb4a5c3201469a5b5eb63

SHA1
3e89ff837147c16b4e41c30d6c796374e0b8e62c

SHA256
9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

SHA512
9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

Download Submit
memory/1740-2-0x0000000000401000-0x000000000040A000-memory.dmp

Filesize
36KB

Download
memory/1740-0-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/1740-16-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/2744-17-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download