446278b00e672276ebd77b7a20356f9fdad4aeb0add39d714de87f3c6b17af89

Resubmissions

22/05/2023, 08:09

230522-j15zbahf9x 7

08/05/2023, 11:01

230508-m4jf9sac65 7

Analysis

max time kernel
8s
max time network
13s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
08/05/2023, 11:01

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General

Target

verybigchimpanzee.exe
Size

344KB
MD5

aec814bf30dd191b641feef457a718ce
SHA1

96c2bea5b416d10a2dae60acd2b7f9c7cebb8115
SHA256

446278b00e672276ebd77b7a20356f9fdad4aeb0add39d714de87f3c6b17af89
SHA512

fdd89bcb64728e88e5b9453f3c93c011fa2f22a5947a3d380ac2768184126c27b0e97556ace1d736cfe4da20281b5c710af78f55460948d5561c979021f5b6b0
SSDEEP

6144:SXRrO+JguvyIs1DkhmgPZw6JXAL5+9bbYZQ4:ir/9m3cYZQ

Score

7^/10

Malware Config

Signatures

Deletes itself 1 IoCs

pid	Process
1924	cmd.exe

Executes dropped EXE 1 IoCs

pid	Process
1272	verybigchimpanzee.exe

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

pid	Process
544	schtasks.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
520	PING.EXE

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1768	verybigchimpanzee.exe
Token: SeDebugPrivilege	1272	verybigchimpanzee.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1768 wrote to memory of 1924	1768	verybigchimpanzee.exe	28
PID 1768 wrote to memory of 1924	1768	verybigchimpanzee.exe	28
PID 1768 wrote to memory of 1924	1768	verybigchimpanzee.exe	28
PID 1924 wrote to memory of 560	1924	cmd.exe	30
PID 1924 wrote to memory of 560	1924	cmd.exe	30
PID 1924 wrote to memory of 560	1924	cmd.exe	30
PID 1924 wrote to memory of 520	1924	cmd.exe	31
PID 1924 wrote to memory of 520	1924	cmd.exe	31
PID 1924 wrote to memory of 520	1924	cmd.exe	31
PID 1924 wrote to memory of 544	1924	cmd.exe	32
PID 1924 wrote to memory of 544	1924	cmd.exe	32
PID 1924 wrote to memory of 544	1924	cmd.exe	32
PID 1924 wrote to memory of 1272	1924	cmd.exe	33
PID 1924 wrote to memory of 1272	1924	cmd.exe	33
PID 1924 wrote to memory of 1272	1924	cmd.exe	33

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\verybigchimpanzee.exe
"C:\Users\Admin\AppData\Local\Temp\verybigchimpanzee.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1768
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C chcp 65001 && ping 127.0.0.1 && schtasks /create /tn "verybigchimpanzee" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\Nvidia\verybigchimpanzee.exe" /rl HIGHEST /f && DEL /F /S /Q /A "C:\Users\Admin\AppData\Local\Temp\verybigchimpanzee.exe" &&START "" "C:\Users\Admin\AppData\Local\Nvidia\verybigchimpanzee.exe"
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:1924
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:560
- - C:\Windows\system32\PING.EXE
    ping 127.0.0.1
    3⤵
    - Runs ping.exe
    PID:520
- - C:\Windows\system32\schtasks.exe
    schtasks /create /tn "verybigchimpanzee" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\Nvidia\verybigchimpanzee.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:544
- - C:\Users\Admin\AppData\Local\Nvidia\verybigchimpanzee.exe
    "C:\Users\Admin\AppData\Local\Nvidia\verybigchimpanzee.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:1272

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Nvidia\verybigchimpanzee.exe

Filesize
344KB

MD5
aec814bf30dd191b641feef457a718ce

SHA1
96c2bea5b416d10a2dae60acd2b7f9c7cebb8115

SHA256
446278b00e672276ebd77b7a20356f9fdad4aeb0add39d714de87f3c6b17af89

SHA512
fdd89bcb64728e88e5b9453f3c93c011fa2f22a5947a3d380ac2768184126c27b0e97556ace1d736cfe4da20281b5c710af78f55460948d5561c979021f5b6b0

Download Submit
C:\Users\Admin\AppData\Local\Nvidia\verybigchimpanzee.exe

Filesize
344KB

MD5
aec814bf30dd191b641feef457a718ce

SHA1
96c2bea5b416d10a2dae60acd2b7f9c7cebb8115

SHA256
446278b00e672276ebd77b7a20356f9fdad4aeb0add39d714de87f3c6b17af89

SHA512
fdd89bcb64728e88e5b9453f3c93c011fa2f22a5947a3d380ac2768184126c27b0e97556ace1d736cfe4da20281b5c710af78f55460948d5561c979021f5b6b0

Download Submit
memory/1272-60-0x0000000000320000-0x000000000037C000-memory.dmp

Filesize
368KB

Download
memory/1272-62-0x000000001B1B0000-0x000000001B230000-memory.dmp

Filesize
512KB

Download
memory/1768-54-0x0000000001380000-0x00000000013DC000-memory.dmp

Filesize
368KB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads