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nsa91fd.tmp

The file nsa91fd.tmp has been detected as a potentially unwanted program by 12 anti-malware scanners. It runs as a separate (within the context of its own process) windows Service named “Form Letter Layer”. The file has been seen being downloaded from d2htwdv930b0cg.cloudfront.net.
MD5:
cabe9f701c7cb33266421ef0615a6ebd

SHA-1:
42a2994a5ee40ea7a9dbfebd9d9a7d5f77280798

SHA-256:
cb81f0a146faa4ffb80f2f0f294a6ad13e4d92f4b714d6aab2305381d4396608

Scanner detections:
12 / 68

Status:
Potentially unwanted

Analysis date:
11/27/2024 9:00:40 AM UTC  (today)

Scan engine
Detection
Engine version

Lavasoft Ad-Aware
Gen:Variant.Mikey.12499
622

Bitdefender
Gen:Variant.Mikey.12499
1.0.20.715

Dr.Web
Adware.ClickMeIn.1150
9.0.1.0156

Emsisoft Anti-Malware
Gen:Variant.Mikey.12499
8.15.05.23.11

ESET NOD32
Win32/Adware.ConvertAd.LA (variant)
9.11568

F-Secure
Gen:Variant.Mikey.12499
11.2015-23-05_7

G Data
Gen:Variant.Mikey.12499
15.5.25

Kaspersky
UDS:DangerousObject.Multi.Generic
14.0.0.1995

MicroWorld eScan
Gen:Variant.Mikey.12499
16.0.0.429

Qihoo 360 Security
HEUR/QVM10.1.Malware.Gen
1.0.0.1015

Reason Heuristics
Threat.Win.Reputation.IMP
15.6.5.0

VIPRE Antivirus
Trojan.Win32.Generic
39978

File size:
334 KB (342,016 bytes)

Common path:
C:\users\{user}\appdata\roaming\401f6ec3-1429215759-e011-84b4-efc588841828\nsa91fd.tmp

File PE Metadata
Compilation timestamp:
4/30/2015 8:01:23 PM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
10.0

CTPH (ssdeep):
6144:UBhUmIfhP6N5H8HLwYUYCTwaryXZ3RQ6XcQs:Bmyh65H8H0UCTwayphQ6k

Entry address:
0x2261C

Entry point:
E8, 10, 78, 00, 00, E9, 89, FE, FF, FF, 8B, FF, 55, 8B, EC, 83, 7D, 08, 00, 74, 2D, FF, 75, 08, 6A, 00, FF, 35, EC, 1D, 45, 00, FF, 15, 38, 50, 44, 00, 85, C0, 75, 18, 56, E8, FF, 06, 00, 00, 8B, F0, FF, 15, 24, 50, 44, 00, 50, E8, AF, 06, 00, 00, 59, 89, 06, 5E, 5D, C3, 8B, FF, 55, 8B, EC, 8B, 4D, 0C, 53, 33, DB, 3B, CB, 76, 1B, 6A, E0, 33, D2, 58, F7, F1, 3B, 45, 10, 73, 0F, E8, CB, 06, 00, 00, C7, 00, 0C, 00, 00, 00, 33, C0, EB, 41, 0F, AF, 4D, 10, 56, 57, 8B, F1, 39, 5D, 08, 74, 0B, FF, 75, 08, E8, 4F...
 
[+]

Entropy:
6.4989

Code size:
272 KB (278,528 bytes)

Service
Display name:
Form Letter Layer

Service name:
bymyheku

Description:
Icon Capital Letters

Type:
Win32OwnProcess


The file nsa91fd.tmp has been seen being distributed by the following URL.

http://d2htwdv930b0cg.cloudfront.net/VOsrv.exe

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