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
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
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

Cab141F.tmp

Path C:\Users\Admin\AppData\Local\Temp\Cab141F.tmp
Size 70KB
SHA256 b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f
MD5 49aebf8cbd62d92ac215b2923fb1b9f5
SHA1 1723be06719828dda65ad804298d0431f6aff976
SHA512 bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b
SSDEEP 1536:gc257bHnClJ3v5mnAQEBP+bfnW8Ctl8G1G4eu76NWDdB34w18R5cBWcJAm68+Q:gp2ld5jPqW8LgeulxB3fgcEfDQ
MD5 SHA1 SHA512 SSDEEP

Submit Download

Tar1441.tmp

Path C:\Users\Admin\AppData\Local\Temp\Tar1441.tmp
Size 181KB
SHA256 8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8
MD5 4ea6026cf93ec6338144661bf1202cd1
SHA1 a1dec9044f750ad887935a01430bf49322fbdcb7
SHA512 6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b
SSDEEP 1536:aAZw/J+lCUsTRvsqgCyqWlUDNWdm1wpSru2A0XwjY/z02DTr3rmt6mZ:as2J+qTR0XCy/dmASru2AijbdG
MD5 SHA1 SHA512 SSDEEP

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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 \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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jfiag3g_gg.exe

Path \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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memory/2620-59-0x0000000000400000-0x0000000000422000-memory.dmp

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

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

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

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

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

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

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

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

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

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