nymaim | d1a6ec7fce50c1bf1bc864559ef593786f3a4985902c989c8bfc5e987fcdd9b6

Analysis

max time kernel
91s
max time network
132s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
26/11/2022, 00:47

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General

Target
file.exe
Size 1.3MB
Sample221126-a47smsad28
SHA256 d1a6ec7fce50c1bf1bc864559ef593786f3a4985902c989c8bfc5e987fcdd9b6
MD5 899fe23d229ba295032ab3f2b204683e
SHA1 1f86ceda70fb6ff3b4ef0b5c029c558e7efc5e13
SHA512 62f66eb033b20e73889d1e9a6ace9a9d819ca5eef6197634cc96fca666fd6c2cdddfb5fcd6b05124b6156e08e5a35c29a5f294ac8efb47f9d46c3def87aa2f6e
SSDEEP 24576:lizOoTpkEbh/q6As7dZnS6iDNklY3X8LouBeoPTqTx0bQnwNNIAdQ/FgZIY7eCLH:OnLqsJdySCXksoPTcnwPIAd5NeViV
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
4332	is-HPI50.tmp
4992	PrintFolders.exe
4952	mfaT8vnGYrZn.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-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation	PrintFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
4332	is-HPI50.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-69IC1.tmp	is-HPI50.tmp
File created	C:\Program Files (x86)\PrintFolders\is-UD12H.tmp	is-HPI50.tmp
File created	C:\Program Files (x86)\PrintFolders\is-LUIH4.tmp	is-HPI50.tmp
File created	C:\Program Files (x86)\PrintFolders\is-U0IK9.tmp	is-HPI50.tmp
File created	C:\Program Files (x86)\PrintFolders\is-90779.tmp	is-HPI50.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-HPI50.tmp
File created	C:\Program Files (x86)\PrintFolders\is-A1N72.tmp	is-HPI50.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-HPI50.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-HPI50.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
204	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4992	PrintFolders.exe
4992	PrintFolders.exe
4992	PrintFolders.exe
4992	PrintFolders.exe
4992	PrintFolders.exe
4992	PrintFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	204	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4512 wrote to memory of 4332	4512	file.exe	79
PID 4512 wrote to memory of 4332	4512	file.exe	79
PID 4512 wrote to memory of 4332	4512	file.exe	79
PID 4332 wrote to memory of 4992	4332	is-HPI50.tmp	80
PID 4332 wrote to memory of 4992	4332	is-HPI50.tmp	80
PID 4332 wrote to memory of 4992	4332	is-HPI50.tmp	80
PID 4992 wrote to memory of 4952	4992	PrintFolders.exe	81
PID 4992 wrote to memory of 4952	4992	PrintFolders.exe	81
PID 4992 wrote to memory of 4952	4992	PrintFolders.exe	81
PID 4992 wrote to memory of 3544	4992	PrintFolders.exe	84
PID 4992 wrote to memory of 3544	4992	PrintFolders.exe	84
PID 4992 wrote to memory of 3544	4992	PrintFolders.exe	84
PID 3544 wrote to memory of 204	3544	cmd.exe	86
PID 3544 wrote to memory of 204	3544	cmd.exe	86
PID 3544 wrote to memory of 204	3544	cmd.exe	86

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4512
- C:\Users\Admin\AppData\Local\Temp\is-EVT3D.tmp\is-HPI50.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-EVT3D.tmp\is-HPI50.tmp" /SL4 $80028 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1126686 51712
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:4332
- - C:\Program Files (x86)\PrintFolders\PrintFolders.exe
    "C:\Program Files (x86)\PrintFolders\PrintFolders.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:4992
  - - C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\mfaT8vnGYrZn.exe
      4⤵
      Executes dropped EXE
      PID:4952
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "PrintFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\PrintFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3544
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PrintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:204

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

PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 1.5MB
SHA256 f27b80bad655954e28fd9034ad985a18690be105d7151371e4fa65c59ee1bb4f
MD5 fdd703f7a409d8311360c9f16724c2e0
SHA1 445df962bfdb5efdff3129cd97b0a50c80ec7a18
SHA512 d71b7a7b76a81f9c4712acc6c1cb734daa1fa417d6c0716b509583baa84e1f55125c013df261924409c9d8bc23a8573bcd69390eaf19e29846b9850109922e9d
SSDEEP 24576:zghBaC/bAnRqLJlDfPXkJmEEcZwDPOThiycAA6Ktri:s3aCCqjfP+ZwjiiK
MD5 SHA1 SHA512 SSDEEP

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PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 1.5MB
SHA256 f27b80bad655954e28fd9034ad985a18690be105d7151371e4fa65c59ee1bb4f
MD5 fdd703f7a409d8311360c9f16724c2e0
SHA1 445df962bfdb5efdff3129cd97b0a50c80ec7a18
SHA512 d71b7a7b76a81f9c4712acc6c1cb734daa1fa417d6c0716b509583baa84e1f55125c013df261924409c9d8bc23a8573bcd69390eaf19e29846b9850109922e9d
SSDEEP 24576:zghBaC/bAnRqLJlDfPXkJmEEcZwDPOThiycAA6Ktri:s3aCCqjfP+ZwjiiK
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-747HL.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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is-HPI50.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-EVT3D.tmp\is-HPI50.tmp
Size 643KB
SHA256 1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7
MD5 85b94e72c3f2d2b5464e2aaf3c9e242a
SHA1 ce7ccae5f50a990d059d59292d4a332979e162ba
SHA512 c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880
SSDEEP 12288:Oh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvJxO0:05NoqWolrP837JzHvA6yknyWFxvJxO0
MD5 SHA1 SHA512 SSDEEP

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is-HPI50.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-EVT3D.tmp\is-HPI50.tmp
Size 643KB
SHA256 1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7
MD5 85b94e72c3f2d2b5464e2aaf3c9e242a
SHA1 ce7ccae5f50a990d059d59292d4a332979e162ba
SHA512 c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880
SSDEEP 12288:Oh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvJxO0:05NoqWolrP837JzHvA6yknyWFxvJxO0
MD5 SHA1 SHA512 SSDEEP

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mfaT8vnGYrZn.exe

Path C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\mfaT8vnGYrZn.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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mfaT8vnGYrZn.exe

Path C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\mfaT8vnGYrZn.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/4512-137-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/4512-156-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/4512-132-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/4992-143-0x0000000000400000-0x0000000001384000-memory.dmp

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memory/4992-148-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/4992-152-0x0000000000400000-0x0000000001384000-memory.dmp

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memory/4992-144-0x0000000000400000-0x0000000001384000-memory.dmp

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memory/4992-142-0x0000000000400000-0x0000000001384000-memory.dmp

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memory/4992-155-0x0000000000400000-0x0000000001384000-memory.dmp

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