0bdb5a8a22632fe9d799b12f4e7bf097cc372c1ba5ddd62f4350677b08b233e0

Analysis

max time kernel
115s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
29/12/2022, 18:22

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General

Target

FoxitPDFReader121_L10N_Setup_Prom.exe
Size

189.8MB
MD5

685029bef19e567e0dab08bf1394fa78
SHA1

405f1117247a339904d05b9c917669cac24fda75
SHA256

0bdb5a8a22632fe9d799b12f4e7bf097cc372c1ba5ddd62f4350677b08b233e0
SHA512

9140a3013866de682dc0dca058842ee29b8621117958d10971ec847913cbc61e91ac5663d97c9c3df31f805e5d26aec039e9a8bbb68dd3431ef078f33c8845ed
SSDEEP

3145728:wBxnlrm34XwH+7axsA48DvVmh3XjyJ8oXVfCtXN/BAXi6jkT6pOUR:wBVlrm3CUlWd8DvVmw8oFfCtXFuyT6pH

Score

8^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
4308	FoxitPDFReader121_L10N_Setup_Prom.tmp

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	FoxitPDFReader121_L10N_Setup_Prom.tmp

Loads dropped DLL 1 IoCs

pid	Process
4308	FoxitPDFReader121_L10N_Setup_Prom.tmp

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

System Information Discovery
T1082

Kills process with taskkill 1 IoCs

evasion

pid	Process
4000	taskkill.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4000	taskkill.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 5000 wrote to memory of 4308	5000	FoxitPDFReader121_L10N_Setup_Prom.exe	83
PID 5000 wrote to memory of 4308	5000	FoxitPDFReader121_L10N_Setup_Prom.exe	83
PID 5000 wrote to memory of 4308	5000	FoxitPDFReader121_L10N_Setup_Prom.exe	83
PID 4308 wrote to memory of 4000	4308	FoxitPDFReader121_L10N_Setup_Prom.tmp	92
PID 4308 wrote to memory of 4000	4308	FoxitPDFReader121_L10N_Setup_Prom.tmp	92
PID 4308 wrote to memory of 4000	4308	FoxitPDFReader121_L10N_Setup_Prom.tmp	92

C:\Users\Admin\AppData\Local\Temp\FoxitPDFReader121_L10N_Setup_Prom.exe
"C:\Users\Admin\AppData\Local\Temp\FoxitPDFReader121_L10N_Setup_Prom.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:5000
- C:\Users\Admin\AppData\Local\Temp\is-8HAD2.tmp\FoxitPDFReader121_L10N_Setup_Prom.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-8HAD2.tmp\FoxitPDFReader121_L10N_Setup_Prom.tmp" /SL5="$601F0,198129579,421376,C:\Users\Admin\AppData\Local\Temp\FoxitPDFReader121_L10N_Setup_Prom.exe"
  2⤵
  - Executes dropped EXE
  - Checks computer location settings
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:4308
- - C:\Windows\SysWOW64\taskkill.exe
    "C:\Windows\system32\taskkill.exe" /f /im FoxitReaderUpdater.exe
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:4000

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\is-8HAD2.tmp\FoxitPDFReader121_L10N_Setup_Prom.tmp

Filesize
1.4MB

MD5
a3166f0ff65dbef6b16f3ad26088c64d

SHA1
7810039b5b60a35b0a4e2518b8d3d59a45d88957

SHA256
5585de8001ba59a2061485a2c8d49b288b8baea4b107beb4d54e62581e991ff4

SHA512
6032a4d3de1ef0fe3ac09e1a05efea3c8162b1a0e983d230354e6830d5e1661dc7bba452286b80d76ff1432e9190361afbaa22b5e47216e6b9ffa3b9e5ac4809

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-DN0MC.tmp\FXCUSTOM.dll

Filesize
2.1MB

MD5
acbe87ed13e8a2448d4e47aea9923958

SHA1
c1999c3cad3eb33d8d0cc02312e0a549bac102bd

SHA256
ca843f1f5f4cb38a945c9865cc5c17f287480c1123c5f6b0d5985472a94b77ae

SHA512
26528b8e429cb9047ec6f761e09ee7cce293c0e7902ca0f65b044795c881daa96a3fb2e9e0619bc560881dd81c1ac9f8dd0ae4be9491bc8595437a459124c028

Download Submit
memory/5000-132-0x0000000000400000-0x0000000000471000-memory.dmp

Filesize
452KB

Download
memory/5000-136-0x0000000000400000-0x0000000000471000-memory.dmp

Filesize
452KB

Download