nymaim | eeb73a7ee8807b63c2a9e11b578dc3e79c8e7a3afed91b3c242c84587d52596f

Analysis

max time kernel
151s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
12/12/2022, 02:32

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
file.exe
Size 2.3MB
Sample221212-c1bbdach2t
SHA256 eeb73a7ee8807b63c2a9e11b578dc3e79c8e7a3afed91b3c242c84587d52596f
MD5 66d8c1eeb5c860c20d974bfa62102282
SHA1 55fab8c73e20068921d37de4ff2e5df099b83d99
SHA512 66260d087f22bf961be505f6f6ff09ed2534936de63aa400e4adc23a3c75ec829d41dd977d0042d4f677a625ead557d9573200ac4c969431b6f19f1f165f631e
SSDEEP 49152:pz2wLdosPAwGDxbiyblxOJqNQaHUGDHAgJqVv0qQjD:pyidobLyJEDHxEB+
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

nymaim discovery trojan

Malware Config

Extracted

Family

nymaim

45.139.105.171
85.31.46.167

Signatures

NyMaim
NyMaim is a malware with various capabilities written in C++ and first seen in 2013.
trojan nymaim

Executes dropped EXE 3 IoCs

pid	Process
2148	is-4D9AT.tmp
2808	nvFolders.exe
712	OYqFRjjmiSDXoI.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\Control Panel\International\Geo\Nation	nvFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
2148	is-4D9AT.tmp

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Drops file in Program Files directory 9 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\PrintFolders\is-FQ23H.tmp	is-4D9AT.tmp
File created	C:\Program Files (x86)\PrintFolders\is-V99A6.tmp	is-4D9AT.tmp
File created	C:\Program Files (x86)\PrintFolders\is-RJ253.tmp	is-4D9AT.tmp
File created	C:\Program Files (x86)\PrintFolders\is-GGOSU.tmp	is-4D9AT.tmp
File created	C:\Program Files (x86)\PrintFolders\is-TUNAA.tmp	is-4D9AT.tmp
File created	C:\Program Files (x86)\PrintFolders\is-01MSF.tmp	is-4D9AT.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-4D9AT.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\nvFolders.exe	is-4D9AT.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-4D9AT.tmp

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

System Information Discovery
T1082

Kills process with taskkill 1 IoCs

evasion

pid	Process
4972	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2808	nvFolders.exe
2808	nvFolders.exe
2808	nvFolders.exe
2808	nvFolders.exe
2808	nvFolders.exe
2808	nvFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4972	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 368 wrote to memory of 2148	368	file.exe	83
PID 368 wrote to memory of 2148	368	file.exe	83
PID 368 wrote to memory of 2148	368	file.exe	83
PID 2148 wrote to memory of 2808	2148	is-4D9AT.tmp	84
PID 2148 wrote to memory of 2808	2148	is-4D9AT.tmp	84
PID 2148 wrote to memory of 2808	2148	is-4D9AT.tmp	84
PID 2808 wrote to memory of 712	2808	nvFolders.exe	85
PID 2808 wrote to memory of 712	2808	nvFolders.exe	85
PID 2808 wrote to memory of 712	2808	nvFolders.exe	85
PID 2808 wrote to memory of 3908	2808	nvFolders.exe	95
PID 2808 wrote to memory of 3908	2808	nvFolders.exe	95
PID 2808 wrote to memory of 3908	2808	nvFolders.exe	95
PID 3908 wrote to memory of 4972	3908	cmd.exe	97
PID 3908 wrote to memory of 4972	3908	cmd.exe	97
PID 3908 wrote to memory of 4972	3908	cmd.exe	97

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:368
- C:\Users\Admin\AppData\Local\Temp\is-26OE8.tmp\is-4D9AT.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-26OE8.tmp\is-4D9AT.tmp" /SL4 $B01BE "C:\Users\Admin\AppData\Local\Temp\file.exe" 2156088 171520
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:2148
- - C:\Program Files (x86)\PrintFolders\nvFolders.exe
    "C:\Program Files (x86)\PrintFolders\nvFolders.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:2808
  - - C:\Users\Admin\AppData\Roaming\{6e1ce040-6208-11ed-b5ce-806e6f6e6963}\OYqFRjjmiSDXoI.exe
      4⤵
      Executes dropped EXE
      PID:712
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "nvFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\nvFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3908
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "nvFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:4972

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

nvFolders.exe

Path C:\Program Files (x86)\PrintFolders\nvFolders.exe
Size 3.4MB
SHA256 2ce351efdf93e5593756cd6f2b5ff89484d4e014a0b21934b307701bc9cf8c03
MD5 4c76bd48aa3bee5c8d331ac2293c781c
SHA1 7581ceb333642939d08a59e11c8024eaddf97d7f
SHA512 1e2a6fc4884f422ff4507e4eeb18e050a67a0853b9da74fcbd19b1b411dd40f9443ab2c5f3cf443e8c0ad46b4b0486ea9c14d93122b8e444b9e8a5b7261980f7
SSDEEP 49152:gURBT850t/IIqTDvqPkEVqE8WOnZoUIr+Ocw:gURBT850t/InTDvqPkBEEnfROcw
MD5 SHA1 SHA512 SSDEEP

Submit Download

nvFolders.exe

Path C:\Program Files (x86)\PrintFolders\nvFolders.exe
Size 3.4MB
SHA256 2ce351efdf93e5593756cd6f2b5ff89484d4e014a0b21934b307701bc9cf8c03
MD5 4c76bd48aa3bee5c8d331ac2293c781c
SHA1 7581ceb333642939d08a59e11c8024eaddf97d7f
SHA512 1e2a6fc4884f422ff4507e4eeb18e050a67a0853b9da74fcbd19b1b411dd40f9443ab2c5f3cf443e8c0ad46b4b0486ea9c14d93122b8e444b9e8a5b7261980f7
SSDEEP 49152:gURBT850t/IIqTDvqPkEVqE8WOnZoUIr+Ocw:gURBT850t/InTDvqPkBEEnfROcw
MD5 SHA1 SHA512 SSDEEP

Submit Download

is-4D9AT.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-26OE8.tmp\is-4D9AT.tmp
Size 760KB
SHA256 b4ef6313468f57e2134646e25a50b41dd568938b4851fd63a42ffe3d9a3ab317
MD5 a322b20a784ea4c33e6c79160c56e0a6
SHA1 69b4788c3da60a5d4c3a6a2549c42b0953ad7086
SHA512 b219ad0ed9573f00df880b6747ce4c062d5e25904615e7f04d247c0703d2c405fa6e1906dd4bde91ea50bd926a801a48adcb591eb64e59c07ab0a9f8f85f4f64
SSDEEP 12288:gh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvRtq2xO0:y5NoqWolrP837JzHvA6yknyWFxvRt3xz
MD5 SHA1 SHA512 SSDEEP

Submit Download

is-4D9AT.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-26OE8.tmp\is-4D9AT.tmp
Size 760KB
SHA256 b4ef6313468f57e2134646e25a50b41dd568938b4851fd63a42ffe3d9a3ab317
MD5 a322b20a784ea4c33e6c79160c56e0a6
SHA1 69b4788c3da60a5d4c3a6a2549c42b0953ad7086
SHA512 b219ad0ed9573f00df880b6747ce4c062d5e25904615e7f04d247c0703d2c405fa6e1906dd4bde91ea50bd926a801a48adcb591eb64e59c07ab0a9f8f85f4f64
SSDEEP 12288:gh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvRtq2xO0:y5NoqWolrP837JzHvA6yknyWFxvRt3xz
MD5 SHA1 SHA512 SSDEEP

Submit Download

_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-93182.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

Submit Download

OYqFRjjmiSDXoI.exe

Path C:\Users\Admin\AppData\Roaming\{6e1ce040-6208-11ed-b5ce-806e6f6e6963}\OYqFRjjmiSDXoI.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

Submit Download

OYqFRjjmiSDXoI.exe

Path C:\Users\Admin\AppData\Roaming\{6e1ce040-6208-11ed-b5ce-806e6f6e6963}\OYqFRjjmiSDXoI.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/368-138-0x0000000000400000-0x0000000000430000-memory.dmp

Download

memory/368-156-0x0000000000400000-0x0000000000430000-memory.dmp

Download

memory/368-132-0x0000000000400000-0x0000000000430000-memory.dmp

Download

memory/2808-143-0x0000000000400000-0x0000000001571000-memory.dmp

Download

memory/2808-144-0x0000000000400000-0x0000000001571000-memory.dmp

Download

memory/2808-142-0x0000000000400000-0x0000000001571000-memory.dmp

Download

memory/2808-148-0x0000000010000000-0x000000001001B000-memory.dmp

Download

memory/2808-152-0x0000000000400000-0x0000000001571000-memory.dmp

Download

memory/2808-155-0x0000000000400000-0x0000000001571000-memory.dmp

Download