ca0aef7482908df28ea75b42f8b26236aecfcc5b37421fdc0d309cee15500506

Analysis

max time kernel
150s
max time network
160s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
04-11-2024 14:34

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General

Target

arnatic_4.exe
Size

972KB
MD5

5668cb771643274ba2c375ec6403c266
SHA1

dd78b03428b99368906fe62fc46aaaf1db07a8b9
SHA256

d417bd4de6a5227f5ea5cff3567e74fe2b2a25c0a80123b7b37b27db89adc384
SHA512

135bd12414773cc84270af5225920a01487626528d7bbc2b703be71652265772c2e5488ee3f7e2c53b0b01c617b8c7920e0b457472b6724cfa9ec4c390b0a55a
SSDEEP

24576:r2FhEQuE3w782S+UWIO5/6TNkdBAnlXG6+Z1mbXRV:Q/3w782SzWn5/akUlXF+Z1IBV

Score

9^/10

discovery upx

Malware Config

Signatures

Detected Nirsoft tools 2 IoCs

Free utilities often used by attackers which can steal passwords, product keys, etc.

resource	yara_rule
behavioral7/memory/2968-11-0x0000000000400000-0x000000000045B000-memory.dmp	Nirsoft
behavioral7/memory/2620-66-0x0000000000400000-0x0000000000422000-memory.dmp	Nirsoft

Executes dropped EXE 2 IoCs

pid	Process
2968	jfiag3g_gg.exe
2620	jfiag3g_gg.exe

Loads dropped DLL 4 IoCs

pid	Process
2688	arnatic_4.exe
2688	arnatic_4.exe
2688	arnatic_4.exe
2688	arnatic_4.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
4	ip-api.com

UPX packed file 10 IoCs

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

upx

resource	yara_rule
behavioral7/files/0x0004000000004ed7-1.dat	upx
behavioral7/memory/2688-3-0x0000000000470000-0x00000000004CB000-memory.dmp	upx
behavioral7/memory/2968-11-0x0000000000400000-0x000000000045B000-memory.dmp	upx
behavioral7/files/0x0009000000004ed7-49.dat	upx
behavioral7/memory/2688-51-0x0000000000470000-0x0000000000492000-memory.dmp	upx
behavioral7/memory/2620-59-0x0000000000400000-0x0000000000422000-memory.dmp	upx
behavioral7/memory/2688-58-0x0000000000470000-0x0000000000492000-memory.dmp	upx
behavioral7/memory/2688-57-0x0000000000470000-0x00000000004CB000-memory.dmp	upx
behavioral7/memory/2620-66-0x0000000000400000-0x0000000000422000-memory.dmp	upx
behavioral7/memory/2688-67-0x0000000000470000-0x00000000004CB000-memory.dmp	upx

System Location Discovery: System Language Discovery 1 TTPs 3 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	arnatic_4.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	jfiag3g_gg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	jfiag3g_gg.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2620	jfiag3g_gg.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2688 wrote to memory of 2968	2688	arnatic_4.exe	31
PID 2688 wrote to memory of 2968	2688	arnatic_4.exe	31
PID 2688 wrote to memory of 2968	2688	arnatic_4.exe	31
PID 2688 wrote to memory of 2968	2688	arnatic_4.exe	31
PID 2688 wrote to memory of 2620	2688	arnatic_4.exe	32
PID 2688 wrote to memory of 2620	2688	arnatic_4.exe	32
PID 2688 wrote to memory of 2620	2688	arnatic_4.exe	32
PID 2688 wrote to memory of 2620	2688	arnatic_4.exe	32

C:\Users\Admin\AppData\Local\Temp\arnatic_4.exe
"C:\Users\Admin\AppData\Local\Temp\arnatic_4.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2688
- C:\Users\Admin\AppData\Local\Temp\jfiag3g_gg.exe
  C:\Users\Admin\AppData\Local\Temp\jfiag3g_gg.exe /scookiestxt C:\Users\Admin\AppData\Local\Temp\fj4ghga23_fsa.txt
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:2968
- C:\Users\Admin\AppData\Local\Temp\jfiag3g_gg.exe
  C:\Users\Admin\AppData\Local\Temp\jfiag3g_gg.exe /scookiestxt C:\Users\Admin\AppData\Local\Temp\fj4ghga23_fsa.txt
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:2620

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\Cab141F.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\Tar1441.tmp

Filesize
181KB

MD5
4ea6026cf93ec6338144661bf1202cd1

SHA1
a1dec9044f750ad887935a01430bf49322fbdcb7

SHA256
8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

SHA512
6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

Download Submit
C:\Users\Admin\AppData\Local\Temp\fj4ghga23_fsa.txt

Filesize
31B

MD5
b7161c0845a64ff6d7345b67ff97f3b0

SHA1
d223f855da541fe8e4c1d5c50cb26da0a1deb5fc

SHA256
fe9e28ff0b652e22a124b0a05382bc1ac48cbd9c7c76ca647b0c9f8542888f66

SHA512
98d8971ff20ba256cf886a9db416ac9366d2c6ad4ff51a65bd7e539974dc93f4c897f92d8c9c0319c69b27eacf05cd350a0302828e63190b03457a0eda57f680

Download Submit
\Users\Admin\AppData\Local\Temp\jfiag3g_gg.exe

Filesize
184KB

MD5
7fee8223d6e4f82d6cd115a28f0b6d58

SHA1
1b89c25f25253df23426bd9ff6c9208f1202f58b

SHA256
a45317c374d54e322153afd73f0e90f1486638d77b7fd85746d091071bbecd59

SHA512
3ed900b83dd178637c2fd4e8444a899f17f12c4ec92a6f4de4fe544fe8d41b521c69b8f348343cb397d0e160f23e27429042d758b5fa5acac0bab5c3584bace4

Download Submit
\Users\Admin\AppData\Local\Temp\jfiag3g_gg.exe

Filesize
61KB

MD5
a6279ec92ff948760ce53bba817d6a77

SHA1
5345505e12f9e4c6d569a226d50e71b5a572dce2

SHA256
8b581869bf8944a8e0aa169adea2a4afe47434123da477132880aff6a5032181

SHA512
213cb374f1273c899e0c88a20c0101a7c28024ce5046a2e0d7898bd182d918288bb80367fea4454c437c057ff9ed4fffd42be48a13ca73653021a6d63e1cfa9c

Download Submit
memory/2620-59-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/2620-66-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/2688-8-0x0000000000470000-0x00000000004CB000-memory.dmp

Filesize
364KB

Download
memory/2688-51-0x0000000000470000-0x0000000000492000-memory.dmp

Filesize
136KB

Download
memory/2688-3-0x0000000000470000-0x00000000004CB000-memory.dmp

Filesize
364KB

Download
memory/2688-58-0x0000000000470000-0x0000000000492000-memory.dmp

Filesize
136KB

Download
memory/2688-57-0x0000000000470000-0x00000000004CB000-memory.dmp

Filesize
364KB

Download
memory/2688-67-0x0000000000470000-0x00000000004CB000-memory.dmp

Filesize
364KB

Download
memory/2688-69-0x0000000000470000-0x0000000000492000-memory.dmp

Filesize
136KB

Download
memory/2968-11-0x0000000000400000-0x000000000045B000-memory.dmp

Filesize
364KB

Download