ca0aef7482908df28ea75b42f8b26236aecfcc5b37421fdc0d309cee15500506

Analysis

max time kernel
149s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
04/11/2024, 14:34

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General

Target
arnatic_4.exe
Size 972KB
Sample241104-rxgfjs1dpf
SHA256 d417bd4de6a5227f5ea5cff3567e74fe2b2a25c0a80123b7b37b27db89adc384
MD5 5668cb771643274ba2c375ec6403c266
SHA1 dd78b03428b99368906fe62fc46aaaf1db07a8b9
SHA512 135bd12414773cc84270af5225920a01487626528d7bbc2b703be71652265772c2e5488ee3f7e2c53b0b01c617b8c7920e0b457472b6724cfa9ec4c390b0a55a
SSDEEP 24576:r2FhEQuE3w782S+UWIO5/6TNkdBAnlXG6+Z1mbXRV:Q/3w782SzWn5/akUlXF+Z1IBV
MD5 SHA1 SHA512 SSDEEP

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
behavioral8/memory/4876-6-0x0000000000400000-0x000000000045B000-memory.dmp	Nirsoft
behavioral8/memory/4580-17-0x0000000000400000-0x0000000000422000-memory.dmp	Nirsoft

Executes dropped EXE 2 IoCs

pid	Process
4876	jfiag3g_gg.exe
4580	jfiag3g_gg.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
5	ip-api.com

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral8/files/0x000a000000023c1e-2.dat	upx
behavioral8/memory/4876-3-0x0000000000400000-0x000000000045B000-memory.dmp	upx
behavioral8/memory/4876-6-0x0000000000400000-0x000000000045B000-memory.dmp	upx
behavioral8/files/0x0002000000022dc9-10.dat	upx
behavioral8/memory/4580-11-0x0000000000400000-0x0000000000422000-memory.dmp	upx
behavioral8/memory/4580-17-0x0000000000400000-0x0000000000422000-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 2 IoCs

pid	Process
4580	jfiag3g_gg.exe
4580	jfiag3g_gg.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3664 wrote to memory of 4876	3664	arnatic_4.exe	85
PID 3664 wrote to memory of 4876	3664	arnatic_4.exe	85
PID 3664 wrote to memory of 4876	3664	arnatic_4.exe	85
PID 3664 wrote to memory of 4580	3664	arnatic_4.exe	90
PID 3664 wrote to memory of 4580	3664	arnatic_4.exe	90
PID 3664 wrote to memory of 4580	3664	arnatic_4.exe	90

C:\Users\Admin\AppData\Local\Temp\arnatic_4.exe
"C:\Users\Admin\AppData\Local\Temp\arnatic_4.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3664
- 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:4876
- 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:4580

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

fj4ghga23_fsa.txt

Path C:\Users\Admin\AppData\Local\Temp\fj4ghga23_fsa.txt
Size 1KB
SHA256 0e676be9e3424783ce5d28d5d2536cc61e18513857b632c02f400c418a82c5f2
MD5 35447fbb982f885a40bbecc98339af58
SHA1 06387e0ece5f2e27649330e838e5d8d52b7e96ef
SHA512 a46fa1de3412f7c15d49da4fa64612e2db7b42ed75316349278798a74f598ed6150896a5dc679be8fa81f25d3062f9c040e2ff83d6a3fc265d559ccaf989e39f
MD5 SHA1 SHA512

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fj4ghga23_fsa.txt

Path C:\Users\Admin\AppData\Local\Temp\fj4ghga23_fsa.txt
Size 31B
SHA256 fe9e28ff0b652e22a124b0a05382bc1ac48cbd9c7c76ca647b0c9f8542888f66
MD5 b7161c0845a64ff6d7345b67ff97f3b0
SHA1 d223f855da541fe8e4c1d5c50cb26da0a1deb5fc
SHA512 98d8971ff20ba256cf886a9db416ac9366d2c6ad4ff51a65bd7e539974dc93f4c897f92d8c9c0319c69b27eacf05cd350a0302828e63190b03457a0eda57f680
MD5 SHA1 SHA512

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jfiag3g_gg.exe

Path C:\Users\Admin\AppData\Local\Temp\jfiag3g_gg.exe
Size 61KB
SHA256 8b581869bf8944a8e0aa169adea2a4afe47434123da477132880aff6a5032181
MD5 a6279ec92ff948760ce53bba817d6a77
SHA1 5345505e12f9e4c6d569a226d50e71b5a572dce2
SHA512 213cb374f1273c899e0c88a20c0101a7c28024ce5046a2e0d7898bd182d918288bb80367fea4454c437c057ff9ed4fffd42be48a13ca73653021a6d63e1cfa9c
SSDEEP 1536:kFqVH99TlY1Gsae6hiQ0OghNUenX7snouy8/JVz5:79TlY1Gsae6hKhNUaX7sout/JJ5
MD5 SHA1 SHA512 SSDEEP

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jfiag3g_gg.exe

Path C:\Users\Admin\AppData\Local\Temp\jfiag3g_gg.exe
Size 184KB
SHA256 a45317c374d54e322153afd73f0e90f1486638d77b7fd85746d091071bbecd59
MD5 7fee8223d6e4f82d6cd115a28f0b6d58
SHA1 1b89c25f25253df23426bd9ff6c9208f1202f58b
SHA512 3ed900b83dd178637c2fd4e8444a899f17f12c4ec92a6f4de4fe544fe8d41b521c69b8f348343cb397d0e160f23e27429042d758b5fa5acac0bab5c3584bace4
SSDEEP 3072:Wqpy/Qpjny+xdr+xG1IJQqv5Os/8+lD0y40rIyTZGnq7gUT+uX2uR:M/Ejn0ai5j/8+lDtTZGnql6n
MD5 SHA1 SHA512 SSDEEP

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memory/4580-11-0x0000000000400000-0x0000000000422000-memory.dmp

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memory/4580-17-0x0000000000400000-0x0000000000422000-memory.dmp

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memory/4876-3-0x0000000000400000-0x000000000045B000-memory.dmp

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memory/4876-6-0x0000000000400000-0x000000000045B000-memory.dmp

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