nymaim | 5ebf216fb060f8a90376019b3c815f907b3b94c8deaaf27682196047dec7b2d0

Analysis

max time kernel
91s
max time network
105s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
19/12/2022, 15:02

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
file.exe
Size 2.3MB
Sample221219-sefa7sfc67
SHA256 5ebf216fb060f8a90376019b3c815f907b3b94c8deaaf27682196047dec7b2d0
MD5 a28d3e3dcbf15c5ba1348e6da1fc0588
SHA1 aa4f3636d552303724ea78177a6c7a194e28a9b8
SHA512 d09dda3e1e9c1684edd7c84eac109c60c97bf26ce8e0f5ecab4b01fcacabe8f8780d56922eeaa54d2148229ff044fbbdeab9122bfe0230a19c57050184e8bd94
SSDEEP 49152:H1JQTcHO8Vu9/MNiRyqBxINPZKLuOmujpDhQRf/kLsTOTyOH6cNBpcm:HkTcHVM9/MNdqwNAjVKRf/Im14vD
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
4896	is-7K0UP.tmp
3104	odFolders.exe
3640	kqTLv3l.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-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	odFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
4896	is-7K0UP.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\unins000.dat	is-7K0UP.tmp
File created	C:\Program Files (x86)\PrintFolders\is-2REIF.tmp	is-7K0UP.tmp
File created	C:\Program Files (x86)\PrintFolders\is-02H2A.tmp	is-7K0UP.tmp
File created	C:\Program Files (x86)\PrintFolders\is-USO9D.tmp	is-7K0UP.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-7K0UP.tmp
File created	C:\Program Files (x86)\PrintFolders\is-RN4TI.tmp	is-7K0UP.tmp
File created	C:\Program Files (x86)\PrintFolders\is-RL3S9.tmp	is-7K0UP.tmp
File created	C:\Program Files (x86)\PrintFolders\is-3BM36.tmp	is-7K0UP.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\odFolders.exe	is-7K0UP.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
3876	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3104	odFolders.exe
3104	odFolders.exe
3104	odFolders.exe
3104	odFolders.exe
3104	odFolders.exe
3104	odFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3876	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4864 wrote to memory of 4896	4864	file.exe	80
PID 4864 wrote to memory of 4896	4864	file.exe	80
PID 4864 wrote to memory of 4896	4864	file.exe	80
PID 4896 wrote to memory of 3104	4896	is-7K0UP.tmp	81
PID 4896 wrote to memory of 3104	4896	is-7K0UP.tmp	81
PID 4896 wrote to memory of 3104	4896	is-7K0UP.tmp	81
PID 3104 wrote to memory of 3640	3104	odFolders.exe	82
PID 3104 wrote to memory of 3640	3104	odFolders.exe	82
PID 3104 wrote to memory of 3640	3104	odFolders.exe	82
PID 3104 wrote to memory of 1472	3104	odFolders.exe	90
PID 3104 wrote to memory of 1472	3104	odFolders.exe	90
PID 3104 wrote to memory of 1472	3104	odFolders.exe	90
PID 1472 wrote to memory of 3876	1472	cmd.exe	92
PID 1472 wrote to memory of 3876	1472	cmd.exe	92
PID 1472 wrote to memory of 3876	1472	cmd.exe	92

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4864
- C:\Users\Admin\AppData\Local\Temp\is-33EGH.tmp\is-7K0UP.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-33EGH.tmp\is-7K0UP.tmp" /SL4 $1301D8 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2139203 161280
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:4896
- - C:\Program Files (x86)\PrintFolders\odFolders.exe
    "C:\Program Files (x86)\PrintFolders\odFolders.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:3104
  - - C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\kqTLv3l.exe
      4⤵
      Executes dropped EXE
      PID:3640
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "odFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\odFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1472
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "odFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:3876

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

odFolders.exe

Path C:\Program Files (x86)\PrintFolders\odFolders.exe
Size 3.6MB
SHA256 49e99f987096d24d4bb96dfc33a581a887c32c22e7f2a403aac7f371f1c35f40
MD5 892709826630bcdb9843eab1a062f68d
SHA1 fe2552dd1c0eeeb3e2487edc638da2d448972e9a
SHA512 9274daa6cfe701404d62195518b4572278f3d4e64b9ce894ea496ea586a8950739a33be68763443fbfd4e82bed8faa285b391163903b0dd1fbdd9fe99c28fd84
SSDEEP 98304:Q36Fe90m35EffUPBOTc+lhRpmuT0WsRSka9c5bUzChjUDZ/:DHff4kTcbOZ/
MD5 SHA1 SHA512 SSDEEP

Submit Download

odFolders.exe

Path C:\Program Files (x86)\PrintFolders\odFolders.exe
Size 3.6MB
SHA256 49e99f987096d24d4bb96dfc33a581a887c32c22e7f2a403aac7f371f1c35f40
MD5 892709826630bcdb9843eab1a062f68d
SHA1 fe2552dd1c0eeeb3e2487edc638da2d448972e9a
SHA512 9274daa6cfe701404d62195518b4572278f3d4e64b9ce894ea496ea586a8950739a33be68763443fbfd4e82bed8faa285b391163903b0dd1fbdd9fe99c28fd84
SSDEEP 98304:Q36Fe90m35EffUPBOTc+lhRpmuT0WsRSka9c5bUzChjUDZ/:DHff4kTcbOZ/
MD5 SHA1 SHA512 SSDEEP

Submit Download

is-7K0UP.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-33EGH.tmp\is-7K0UP.tmp
Size 751KB
SHA256 d3316d42181fe77bad85e822e98fa046cbe05e18b6a6ba8eff8f8aaecc4e7b69
MD5 8322e8815d733696cc7c78d6a290d792
SHA1 9078fe6640ac394256fae9082ba944b696cecaa9
SHA512 da9b88300b99bed9684fa70e6181d50fa1a12c8e3b711c0524cc512c30b492e64ada750017c60d0f291a0b4b2fde7848c4b6cb8ad5b9209f07ab22762950a03c
SSDEEP 12288:9h5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvXJQTcYoJRxOm:j5NoqWolrP837JzHvA6yknyWFxvXJQTg
MD5 SHA1 SHA512 SSDEEP

Submit Download

is-7K0UP.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-33EGH.tmp\is-7K0UP.tmp
Size 751KB
SHA256 d3316d42181fe77bad85e822e98fa046cbe05e18b6a6ba8eff8f8aaecc4e7b69
MD5 8322e8815d733696cc7c78d6a290d792
SHA1 9078fe6640ac394256fae9082ba944b696cecaa9
SHA512 da9b88300b99bed9684fa70e6181d50fa1a12c8e3b711c0524cc512c30b492e64ada750017c60d0f291a0b4b2fde7848c4b6cb8ad5b9209f07ab22762950a03c
SSDEEP 12288:9h5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvXJQTcYoJRxOm:j5NoqWolrP837JzHvA6yknyWFxvXJQTg
MD5 SHA1 SHA512 SSDEEP

Submit Download

_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-BJ72N.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

Submit Download

kqTLv3l.exe

Path C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\kqTLv3l.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

Submit Download

kqTLv3l.exe

Path C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\kqTLv3l.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/3104-143-0x0000000000400000-0x00000000015A2000-memory.dmp

Download

memory/3104-142-0x0000000000400000-0x00000000015A2000-memory.dmp

Download

memory/3104-147-0x0000000010000000-0x000000001001B000-memory.dmp

Download

memory/3104-151-0x0000000000400000-0x00000000015A2000-memory.dmp

Download

memory/3104-154-0x0000000000400000-0x00000000015A2000-memory.dmp

Download

memory/4864-132-0x0000000000400000-0x000000000042E000-memory.dmp

Download

memory/4864-137-0x0000000000400000-0x000000000042E000-memory.dmp

Download

memory/4864-155-0x0000000000400000-0x000000000042E000-memory.dmp

Download