nymaim | 6b8ddf4f82fbb9a3958d9ea3576c514c493b360aadab054e1a73a1ce072f6597

Analysis

max time kernel
83s
max time network
136s
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, 20:18

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General

Target
file.exe
Size 2.1MB
Sample221212-y29ffsfc6s
SHA256 6b8ddf4f82fbb9a3958d9ea3576c514c493b360aadab054e1a73a1ce072f6597
MD5 34792ae83abac3a737eac0ecbaf6468c
SHA1 30239bd9f04f3d56a2064fc941b408c2667deb95
SHA512 2608224435c32d81a62eb12774460b26cbfe3b2ebaefa570144cae5f9c87d55f80dd2fadf333342dfd06f0181c063fcfdf0c32269de35d0a111f3b7d6d309aea
SSDEEP 24576:BizFaCnhvzdbEm4Ldr/Ey+jYC+CNOHciCRDmqCRdJcwWx0VUjj9jte/mAzT/SKpd:qFDniZg2yNm5dNYFsmmOT6nDQZg
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
4468	is-VNBC5.tmp
2032	nwFolders.exe
464	7U6tNsb.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-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation	nwFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
4468	is-VNBC5.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-2T5L7.tmp	is-VNBC5.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-VNBC5.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\nwFolders.exe	is-VNBC5.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-VNBC5.tmp
File created	C:\Program Files (x86)\PrintFolders\is-LM2CI.tmp	is-VNBC5.tmp
File created	C:\Program Files (x86)\PrintFolders\is-IAHAA.tmp	is-VNBC5.tmp
File created	C:\Program Files (x86)\PrintFolders\is-0M3R1.tmp	is-VNBC5.tmp
File created	C:\Program Files (x86)\PrintFolders\is-7KT4C.tmp	is-VNBC5.tmp
File created	C:\Program Files (x86)\PrintFolders\is-NDFG9.tmp	is-VNBC5.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
548	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2032	nwFolders.exe
2032	nwFolders.exe
2032	nwFolders.exe
2032	nwFolders.exe
2032	nwFolders.exe
2032	nwFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	548	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1120 wrote to memory of 4468	1120	file.exe	83
PID 1120 wrote to memory of 4468	1120	file.exe	83
PID 1120 wrote to memory of 4468	1120	file.exe	83
PID 4468 wrote to memory of 2032	4468	is-VNBC5.tmp	84
PID 4468 wrote to memory of 2032	4468	is-VNBC5.tmp	84
PID 4468 wrote to memory of 2032	4468	is-VNBC5.tmp	84
PID 2032 wrote to memory of 464	2032	nwFolders.exe	90
PID 2032 wrote to memory of 464	2032	nwFolders.exe	90
PID 2032 wrote to memory of 464	2032	nwFolders.exe	90
PID 2032 wrote to memory of 3792	2032	nwFolders.exe	100
PID 2032 wrote to memory of 3792	2032	nwFolders.exe	100
PID 2032 wrote to memory of 3792	2032	nwFolders.exe	100
PID 3792 wrote to memory of 548	3792	cmd.exe	102
PID 3792 wrote to memory of 548	3792	cmd.exe	102
PID 3792 wrote to memory of 548	3792	cmd.exe	102

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1120
- C:\Users\Admin\AppData\Local\Temp\is-5BL08.tmp\is-VNBC5.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-5BL08.tmp\is-VNBC5.tmp" /SL4 $A01DE "C:\Users\Admin\AppData\Local\Temp\file.exe" 1989799 96256
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:4468
- - C:\Program Files (x86)\PrintFolders\nwFolders.exe
    "C:\Program Files (x86)\PrintFolders\nwFolders.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:2032
  - - C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\7U6tNsb.exe
      4⤵
      Executes dropped EXE
      PID:464
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "nwFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\nwFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3792
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "nwFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:548

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

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Downloads

nwFolders.exe

Path C:\Program Files (x86)\PrintFolders\nwFolders.exe
Size 3.2MB
SHA256 1d50fa3e64882c50f331962a83c2a446f7a205a8b5c6280565636ff1acdbe5a3
MD5 de0e926226626ff39f077453472bb59c
SHA1 8e5f6b927675c6387dab606113386a909b2985b6
SHA512 a9a3732475c731ef5f353e39cd6daea40d270d82a5c6a9b3706fd1e482d66d104820e2987a38b3c834135af5432763592a6fb301cd09db287b13b15ffaa31df8
SSDEEP 98304:a3/rY0nJW5DuHWxJSWfmuw2ACq8sffVVcrnC8:35X4qnC8
MD5 SHA1 SHA512 SSDEEP

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nwFolders.exe

Path C:\Program Files (x86)\PrintFolders\nwFolders.exe
Size 3.2MB
SHA256 1d50fa3e64882c50f331962a83c2a446f7a205a8b5c6280565636ff1acdbe5a3
MD5 de0e926226626ff39f077453472bb59c
SHA1 8e5f6b927675c6387dab606113386a909b2985b6
SHA512 a9a3732475c731ef5f353e39cd6daea40d270d82a5c6a9b3706fd1e482d66d104820e2987a38b3c834135af5432763592a6fb301cd09db287b13b15ffaa31df8
SSDEEP 98304:a3/rY0nJW5DuHWxJSWfmuw2ACq8sffVVcrnC8:35X4qnC8
MD5 SHA1 SHA512 SSDEEP

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is-VNBC5.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-5BL08.tmp\is-VNBC5.tmp
Size 687KB
SHA256 b5060a812c76a050304de3fd25542775644a816a1ea4d36f9c850106fb2e7452
MD5 6b9249ef93da4e9eeaec3a23ba930ea7
SHA1 f9e9d433c638356d4e6bb5b14a93a37abd0ac345
SHA512 ac4797bb3035dc10c85161acea00390c93918da0376d514b6fc047c86bb4cc55e6d084b15f6dbfe9f10bee339eaa70fee3d30d1a0060cbc97e642e0e6485e85b
SSDEEP 12288:gh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvgXxOM:y5NoqWolrP837JzHvA6yknyWFxvgXxOM
MD5 SHA1 SHA512 SSDEEP

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is-VNBC5.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-5BL08.tmp\is-VNBC5.tmp
Size 687KB
SHA256 b5060a812c76a050304de3fd25542775644a816a1ea4d36f9c850106fb2e7452
MD5 6b9249ef93da4e9eeaec3a23ba930ea7
SHA1 f9e9d433c638356d4e6bb5b14a93a37abd0ac345
SHA512 ac4797bb3035dc10c85161acea00390c93918da0376d514b6fc047c86bb4cc55e6d084b15f6dbfe9f10bee339eaa70fee3d30d1a0060cbc97e642e0e6485e85b
SSDEEP 12288:gh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvgXxOM:y5NoqWolrP837JzHvA6yknyWFxvgXxOM
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-VL9MS.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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7U6tNsb.exe

Path C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\7U6tNsb.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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7U6tNsb.exe

Path C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\7U6tNsb.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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memory/1120-156-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/1120-138-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/1120-132-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/2032-143-0x0000000000400000-0x000000000153C000-memory.dmp

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memory/2032-144-0x0000000000400000-0x000000000153C000-memory.dmp

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memory/2032-142-0x0000000000400000-0x000000000153C000-memory.dmp

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memory/2032-148-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/2032-152-0x0000000000400000-0x000000000153C000-memory.dmp

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memory/2032-155-0x0000000000400000-0x000000000153C000-memory.dmp

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